1 //===-- ARMISelLowering.cpp - ARM DAG Lowering Implementation -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interfaces that ARM uses to lower LLVM code into a
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "arm-isel"
17 #include "ARMCallingConv.h"
18 #include "ARMConstantPoolValue.h"
19 #include "ARMISelLowering.h"
20 #include "ARMMachineFunctionInfo.h"
21 #include "ARMPerfectShuffle.h"
22 #include "ARMRegisterInfo.h"
23 #include "ARMSubtarget.h"
24 #include "ARMTargetMachine.h"
25 #include "ARMTargetObjectFile.h"
26 #include "MCTargetDesc/ARMAddressingModes.h"
27 #include "llvm/CallingConv.h"
28 #include "llvm/Constants.h"
29 #include "llvm/Function.h"
30 #include "llvm/GlobalValue.h"
31 #include "llvm/Instruction.h"
32 #include "llvm/Instructions.h"
33 #include "llvm/Intrinsics.h"
34 #include "llvm/Type.h"
35 #include "llvm/CodeGen/CallingConvLower.h"
36 #include "llvm/CodeGen/IntrinsicLowering.h"
37 #include "llvm/CodeGen/MachineBasicBlock.h"
38 #include "llvm/CodeGen/MachineFrameInfo.h"
39 #include "llvm/CodeGen/MachineFunction.h"
40 #include "llvm/CodeGen/MachineInstrBuilder.h"
41 #include "llvm/CodeGen/MachineModuleInfo.h"
42 #include "llvm/CodeGen/MachineRegisterInfo.h"
43 #include "llvm/CodeGen/SelectionDAG.h"
44 #include "llvm/MC/MCSectionMachO.h"
45 #include "llvm/Target/TargetOptions.h"
46 #include "llvm/ADT/StringExtras.h"
47 #include "llvm/ADT/Statistic.h"
48 #include "llvm/Support/CommandLine.h"
49 #include "llvm/Support/ErrorHandling.h"
50 #include "llvm/Support/MathExtras.h"
51 #include "llvm/Support/raw_ostream.h"
55 STATISTIC(NumTailCalls, "Number of tail calls");
56 STATISTIC(NumMovwMovt, "Number of GAs materialized with movw + movt");
58 // This option should go away when tail calls fully work.
60 EnableARMTailCalls("arm-tail-calls", cl::Hidden,
61 cl::desc("Generate tail calls (TEMPORARY OPTION)."),
65 EnableARMLongCalls("arm-long-calls", cl::Hidden,
66 cl::desc("Generate calls via indirect call instructions"),
70 ARMInterworking("arm-interworking", cl::Hidden,
71 cl::desc("Enable / disable ARM interworking (for debugging only)"),
75 class ARMCCState : public CCState {
77 ARMCCState(CallingConv::ID CC, bool isVarArg, MachineFunction &MF,
78 const TargetMachine &TM, SmallVector<CCValAssign, 16> &locs,
79 LLVMContext &C, ParmContext PC)
80 : CCState(CC, isVarArg, MF, TM, locs, C) {
81 assert(((PC == Call) || (PC == Prologue)) &&
82 "ARMCCState users must specify whether their context is call"
83 "or prologue generation.");
89 // The APCS parameter registers.
90 static const unsigned GPRArgRegs[] = {
91 ARM::R0, ARM::R1, ARM::R2, ARM::R3
94 void ARMTargetLowering::addTypeForNEON(EVT VT, EVT PromotedLdStVT,
95 EVT PromotedBitwiseVT) {
96 if (VT != PromotedLdStVT) {
97 setOperationAction(ISD::LOAD, VT.getSimpleVT(), Promote);
98 AddPromotedToType (ISD::LOAD, VT.getSimpleVT(),
99 PromotedLdStVT.getSimpleVT());
101 setOperationAction(ISD::STORE, VT.getSimpleVT(), Promote);
102 AddPromotedToType (ISD::STORE, VT.getSimpleVT(),
103 PromotedLdStVT.getSimpleVT());
106 EVT ElemTy = VT.getVectorElementType();
107 if (ElemTy != MVT::i64 && ElemTy != MVT::f64)
108 setOperationAction(ISD::SETCC, VT.getSimpleVT(), Custom);
109 setOperationAction(ISD::INSERT_VECTOR_ELT, VT.getSimpleVT(), Custom);
110 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT.getSimpleVT(), Custom);
111 if (ElemTy == MVT::i32) {
112 setOperationAction(ISD::SINT_TO_FP, VT.getSimpleVT(), Custom);
113 setOperationAction(ISD::UINT_TO_FP, VT.getSimpleVT(), Custom);
114 setOperationAction(ISD::FP_TO_SINT, VT.getSimpleVT(), Custom);
115 setOperationAction(ISD::FP_TO_UINT, VT.getSimpleVT(), Custom);
117 setOperationAction(ISD::SINT_TO_FP, VT.getSimpleVT(), Expand);
118 setOperationAction(ISD::UINT_TO_FP, VT.getSimpleVT(), Expand);
119 setOperationAction(ISD::FP_TO_SINT, VT.getSimpleVT(), Expand);
120 setOperationAction(ISD::FP_TO_UINT, VT.getSimpleVT(), Expand);
122 setOperationAction(ISD::BUILD_VECTOR, VT.getSimpleVT(), Custom);
123 setOperationAction(ISD::VECTOR_SHUFFLE, VT.getSimpleVT(), Custom);
124 setOperationAction(ISD::CONCAT_VECTORS, VT.getSimpleVT(), Legal);
125 setOperationAction(ISD::EXTRACT_SUBVECTOR, VT.getSimpleVT(), Legal);
126 setOperationAction(ISD::SELECT, VT.getSimpleVT(), Expand);
127 setOperationAction(ISD::SELECT_CC, VT.getSimpleVT(), Expand);
128 setOperationAction(ISD::SIGN_EXTEND_INREG, VT.getSimpleVT(), Expand);
129 if (VT.isInteger()) {
130 setOperationAction(ISD::SHL, VT.getSimpleVT(), Custom);
131 setOperationAction(ISD::SRA, VT.getSimpleVT(), Custom);
132 setOperationAction(ISD::SRL, VT.getSimpleVT(), Custom);
135 // Promote all bit-wise operations.
136 if (VT.isInteger() && VT != PromotedBitwiseVT) {
137 setOperationAction(ISD::AND, VT.getSimpleVT(), Promote);
138 AddPromotedToType (ISD::AND, VT.getSimpleVT(),
139 PromotedBitwiseVT.getSimpleVT());
140 setOperationAction(ISD::OR, VT.getSimpleVT(), Promote);
141 AddPromotedToType (ISD::OR, VT.getSimpleVT(),
142 PromotedBitwiseVT.getSimpleVT());
143 setOperationAction(ISD::XOR, VT.getSimpleVT(), Promote);
144 AddPromotedToType (ISD::XOR, VT.getSimpleVT(),
145 PromotedBitwiseVT.getSimpleVT());
148 // Neon does not support vector divide/remainder operations.
149 setOperationAction(ISD::SDIV, VT.getSimpleVT(), Expand);
150 setOperationAction(ISD::UDIV, VT.getSimpleVT(), Expand);
151 setOperationAction(ISD::FDIV, VT.getSimpleVT(), Expand);
152 setOperationAction(ISD::SREM, VT.getSimpleVT(), Expand);
153 setOperationAction(ISD::UREM, VT.getSimpleVT(), Expand);
154 setOperationAction(ISD::FREM, VT.getSimpleVT(), Expand);
157 void ARMTargetLowering::addDRTypeForNEON(EVT VT) {
158 addRegisterClass(VT, ARM::DPRRegisterClass);
159 addTypeForNEON(VT, MVT::f64, MVT::v2i32);
162 void ARMTargetLowering::addQRTypeForNEON(EVT VT) {
163 addRegisterClass(VT, ARM::QPRRegisterClass);
164 addTypeForNEON(VT, MVT::v2f64, MVT::v4i32);
167 static TargetLoweringObjectFile *createTLOF(TargetMachine &TM) {
168 if (TM.getSubtarget<ARMSubtarget>().isTargetDarwin())
169 return new TargetLoweringObjectFileMachO();
171 return new ARMElfTargetObjectFile();
174 ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
175 : TargetLowering(TM, createTLOF(TM)) {
176 Subtarget = &TM.getSubtarget<ARMSubtarget>();
177 RegInfo = TM.getRegisterInfo();
178 Itins = TM.getInstrItineraryData();
180 setBooleanVectorContents(ZeroOrNegativeOneBooleanContent);
182 if (Subtarget->isTargetDarwin()) {
183 // Uses VFP for Thumb libfuncs if available.
184 if (Subtarget->isThumb() && Subtarget->hasVFP2()) {
185 // Single-precision floating-point arithmetic.
186 setLibcallName(RTLIB::ADD_F32, "__addsf3vfp");
187 setLibcallName(RTLIB::SUB_F32, "__subsf3vfp");
188 setLibcallName(RTLIB::MUL_F32, "__mulsf3vfp");
189 setLibcallName(RTLIB::DIV_F32, "__divsf3vfp");
191 // Double-precision floating-point arithmetic.
192 setLibcallName(RTLIB::ADD_F64, "__adddf3vfp");
193 setLibcallName(RTLIB::SUB_F64, "__subdf3vfp");
194 setLibcallName(RTLIB::MUL_F64, "__muldf3vfp");
195 setLibcallName(RTLIB::DIV_F64, "__divdf3vfp");
197 // Single-precision comparisons.
198 setLibcallName(RTLIB::OEQ_F32, "__eqsf2vfp");
199 setLibcallName(RTLIB::UNE_F32, "__nesf2vfp");
200 setLibcallName(RTLIB::OLT_F32, "__ltsf2vfp");
201 setLibcallName(RTLIB::OLE_F32, "__lesf2vfp");
202 setLibcallName(RTLIB::OGE_F32, "__gesf2vfp");
203 setLibcallName(RTLIB::OGT_F32, "__gtsf2vfp");
204 setLibcallName(RTLIB::UO_F32, "__unordsf2vfp");
205 setLibcallName(RTLIB::O_F32, "__unordsf2vfp");
207 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
208 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETNE);
209 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
210 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
211 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
212 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
213 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
214 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
216 // Double-precision comparisons.
217 setLibcallName(RTLIB::OEQ_F64, "__eqdf2vfp");
218 setLibcallName(RTLIB::UNE_F64, "__nedf2vfp");
219 setLibcallName(RTLIB::OLT_F64, "__ltdf2vfp");
220 setLibcallName(RTLIB::OLE_F64, "__ledf2vfp");
221 setLibcallName(RTLIB::OGE_F64, "__gedf2vfp");
222 setLibcallName(RTLIB::OGT_F64, "__gtdf2vfp");
223 setLibcallName(RTLIB::UO_F64, "__unorddf2vfp");
224 setLibcallName(RTLIB::O_F64, "__unorddf2vfp");
226 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
227 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETNE);
228 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
229 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
230 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
231 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
232 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
233 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
235 // Floating-point to integer conversions.
236 // i64 conversions are done via library routines even when generating VFP
237 // instructions, so use the same ones.
238 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__fixdfsivfp");
239 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__fixunsdfsivfp");
240 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__fixsfsivfp");
241 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__fixunssfsivfp");
243 // Conversions between floating types.
244 setLibcallName(RTLIB::FPROUND_F64_F32, "__truncdfsf2vfp");
245 setLibcallName(RTLIB::FPEXT_F32_F64, "__extendsfdf2vfp");
247 // Integer to floating-point conversions.
248 // i64 conversions are done via library routines even when generating VFP
249 // instructions, so use the same ones.
250 // FIXME: There appears to be some naming inconsistency in ARM libgcc:
251 // e.g., __floatunsidf vs. __floatunssidfvfp.
252 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__floatsidfvfp");
253 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__floatunssidfvfp");
254 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__floatsisfvfp");
255 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__floatunssisfvfp");
259 // These libcalls are not available in 32-bit.
260 setLibcallName(RTLIB::SHL_I128, 0);
261 setLibcallName(RTLIB::SRL_I128, 0);
262 setLibcallName(RTLIB::SRA_I128, 0);
264 if (Subtarget->isAAPCS_ABI() && !Subtarget->isTargetDarwin()) {
265 // Double-precision floating-point arithmetic helper functions
266 // RTABI chapter 4.1.2, Table 2
267 setLibcallName(RTLIB::ADD_F64, "__aeabi_dadd");
268 setLibcallName(RTLIB::DIV_F64, "__aeabi_ddiv");
269 setLibcallName(RTLIB::MUL_F64, "__aeabi_dmul");
270 setLibcallName(RTLIB::SUB_F64, "__aeabi_dsub");
271 setLibcallCallingConv(RTLIB::ADD_F64, CallingConv::ARM_AAPCS);
272 setLibcallCallingConv(RTLIB::DIV_F64, CallingConv::ARM_AAPCS);
273 setLibcallCallingConv(RTLIB::MUL_F64, CallingConv::ARM_AAPCS);
274 setLibcallCallingConv(RTLIB::SUB_F64, CallingConv::ARM_AAPCS);
276 // Double-precision floating-point comparison helper functions
277 // RTABI chapter 4.1.2, Table 3
278 setLibcallName(RTLIB::OEQ_F64, "__aeabi_dcmpeq");
279 setCmpLibcallCC(RTLIB::OEQ_F64, ISD::SETNE);
280 setLibcallName(RTLIB::UNE_F64, "__aeabi_dcmpeq");
281 setCmpLibcallCC(RTLIB::UNE_F64, ISD::SETEQ);
282 setLibcallName(RTLIB::OLT_F64, "__aeabi_dcmplt");
283 setCmpLibcallCC(RTLIB::OLT_F64, ISD::SETNE);
284 setLibcallName(RTLIB::OLE_F64, "__aeabi_dcmple");
285 setCmpLibcallCC(RTLIB::OLE_F64, ISD::SETNE);
286 setLibcallName(RTLIB::OGE_F64, "__aeabi_dcmpge");
287 setCmpLibcallCC(RTLIB::OGE_F64, ISD::SETNE);
288 setLibcallName(RTLIB::OGT_F64, "__aeabi_dcmpgt");
289 setCmpLibcallCC(RTLIB::OGT_F64, ISD::SETNE);
290 setLibcallName(RTLIB::UO_F64, "__aeabi_dcmpun");
291 setCmpLibcallCC(RTLIB::UO_F64, ISD::SETNE);
292 setLibcallName(RTLIB::O_F64, "__aeabi_dcmpun");
293 setCmpLibcallCC(RTLIB::O_F64, ISD::SETEQ);
294 setLibcallCallingConv(RTLIB::OEQ_F64, CallingConv::ARM_AAPCS);
295 setLibcallCallingConv(RTLIB::UNE_F64, CallingConv::ARM_AAPCS);
296 setLibcallCallingConv(RTLIB::OLT_F64, CallingConv::ARM_AAPCS);
297 setLibcallCallingConv(RTLIB::OLE_F64, CallingConv::ARM_AAPCS);
298 setLibcallCallingConv(RTLIB::OGE_F64, CallingConv::ARM_AAPCS);
299 setLibcallCallingConv(RTLIB::OGT_F64, CallingConv::ARM_AAPCS);
300 setLibcallCallingConv(RTLIB::UO_F64, CallingConv::ARM_AAPCS);
301 setLibcallCallingConv(RTLIB::O_F64, CallingConv::ARM_AAPCS);
303 // Single-precision floating-point arithmetic helper functions
304 // RTABI chapter 4.1.2, Table 4
305 setLibcallName(RTLIB::ADD_F32, "__aeabi_fadd");
306 setLibcallName(RTLIB::DIV_F32, "__aeabi_fdiv");
307 setLibcallName(RTLIB::MUL_F32, "__aeabi_fmul");
308 setLibcallName(RTLIB::SUB_F32, "__aeabi_fsub");
309 setLibcallCallingConv(RTLIB::ADD_F32, CallingConv::ARM_AAPCS);
310 setLibcallCallingConv(RTLIB::DIV_F32, CallingConv::ARM_AAPCS);
311 setLibcallCallingConv(RTLIB::MUL_F32, CallingConv::ARM_AAPCS);
312 setLibcallCallingConv(RTLIB::SUB_F32, CallingConv::ARM_AAPCS);
314 // Single-precision floating-point comparison helper functions
315 // RTABI chapter 4.1.2, Table 5
316 setLibcallName(RTLIB::OEQ_F32, "__aeabi_fcmpeq");
317 setCmpLibcallCC(RTLIB::OEQ_F32, ISD::SETNE);
318 setLibcallName(RTLIB::UNE_F32, "__aeabi_fcmpeq");
319 setCmpLibcallCC(RTLIB::UNE_F32, ISD::SETEQ);
320 setLibcallName(RTLIB::OLT_F32, "__aeabi_fcmplt");
321 setCmpLibcallCC(RTLIB::OLT_F32, ISD::SETNE);
322 setLibcallName(RTLIB::OLE_F32, "__aeabi_fcmple");
323 setCmpLibcallCC(RTLIB::OLE_F32, ISD::SETNE);
324 setLibcallName(RTLIB::OGE_F32, "__aeabi_fcmpge");
325 setCmpLibcallCC(RTLIB::OGE_F32, ISD::SETNE);
326 setLibcallName(RTLIB::OGT_F32, "__aeabi_fcmpgt");
327 setCmpLibcallCC(RTLIB::OGT_F32, ISD::SETNE);
328 setLibcallName(RTLIB::UO_F32, "__aeabi_fcmpun");
329 setCmpLibcallCC(RTLIB::UO_F32, ISD::SETNE);
330 setLibcallName(RTLIB::O_F32, "__aeabi_fcmpun");
331 setCmpLibcallCC(RTLIB::O_F32, ISD::SETEQ);
332 setLibcallCallingConv(RTLIB::OEQ_F32, CallingConv::ARM_AAPCS);
333 setLibcallCallingConv(RTLIB::UNE_F32, CallingConv::ARM_AAPCS);
334 setLibcallCallingConv(RTLIB::OLT_F32, CallingConv::ARM_AAPCS);
335 setLibcallCallingConv(RTLIB::OLE_F32, CallingConv::ARM_AAPCS);
336 setLibcallCallingConv(RTLIB::OGE_F32, CallingConv::ARM_AAPCS);
337 setLibcallCallingConv(RTLIB::OGT_F32, CallingConv::ARM_AAPCS);
338 setLibcallCallingConv(RTLIB::UO_F32, CallingConv::ARM_AAPCS);
339 setLibcallCallingConv(RTLIB::O_F32, CallingConv::ARM_AAPCS);
341 // Floating-point to integer conversions.
342 // RTABI chapter 4.1.2, Table 6
343 setLibcallName(RTLIB::FPTOSINT_F64_I32, "__aeabi_d2iz");
344 setLibcallName(RTLIB::FPTOUINT_F64_I32, "__aeabi_d2uiz");
345 setLibcallName(RTLIB::FPTOSINT_F64_I64, "__aeabi_d2lz");
346 setLibcallName(RTLIB::FPTOUINT_F64_I64, "__aeabi_d2ulz");
347 setLibcallName(RTLIB::FPTOSINT_F32_I32, "__aeabi_f2iz");
348 setLibcallName(RTLIB::FPTOUINT_F32_I32, "__aeabi_f2uiz");
349 setLibcallName(RTLIB::FPTOSINT_F32_I64, "__aeabi_f2lz");
350 setLibcallName(RTLIB::FPTOUINT_F32_I64, "__aeabi_f2ulz");
351 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I32, CallingConv::ARM_AAPCS);
352 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I32, CallingConv::ARM_AAPCS);
353 setLibcallCallingConv(RTLIB::FPTOSINT_F64_I64, CallingConv::ARM_AAPCS);
354 setLibcallCallingConv(RTLIB::FPTOUINT_F64_I64, CallingConv::ARM_AAPCS);
355 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I32, CallingConv::ARM_AAPCS);
356 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I32, CallingConv::ARM_AAPCS);
357 setLibcallCallingConv(RTLIB::FPTOSINT_F32_I64, CallingConv::ARM_AAPCS);
358 setLibcallCallingConv(RTLIB::FPTOUINT_F32_I64, CallingConv::ARM_AAPCS);
360 // Conversions between floating types.
361 // RTABI chapter 4.1.2, Table 7
362 setLibcallName(RTLIB::FPROUND_F64_F32, "__aeabi_d2f");
363 setLibcallName(RTLIB::FPEXT_F32_F64, "__aeabi_f2d");
364 setLibcallCallingConv(RTLIB::FPROUND_F64_F32, CallingConv::ARM_AAPCS);
365 setLibcallCallingConv(RTLIB::FPEXT_F32_F64, CallingConv::ARM_AAPCS);
367 // Integer to floating-point conversions.
368 // RTABI chapter 4.1.2, Table 8
369 setLibcallName(RTLIB::SINTTOFP_I32_F64, "__aeabi_i2d");
370 setLibcallName(RTLIB::UINTTOFP_I32_F64, "__aeabi_ui2d");
371 setLibcallName(RTLIB::SINTTOFP_I64_F64, "__aeabi_l2d");
372 setLibcallName(RTLIB::UINTTOFP_I64_F64, "__aeabi_ul2d");
373 setLibcallName(RTLIB::SINTTOFP_I32_F32, "__aeabi_i2f");
374 setLibcallName(RTLIB::UINTTOFP_I32_F32, "__aeabi_ui2f");
375 setLibcallName(RTLIB::SINTTOFP_I64_F32, "__aeabi_l2f");
376 setLibcallName(RTLIB::UINTTOFP_I64_F32, "__aeabi_ul2f");
377 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
378 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F64, CallingConv::ARM_AAPCS);
379 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
380 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F64, CallingConv::ARM_AAPCS);
381 setLibcallCallingConv(RTLIB::SINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
382 setLibcallCallingConv(RTLIB::UINTTOFP_I32_F32, CallingConv::ARM_AAPCS);
383 setLibcallCallingConv(RTLIB::SINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
384 setLibcallCallingConv(RTLIB::UINTTOFP_I64_F32, CallingConv::ARM_AAPCS);
386 // Long long helper functions
387 // RTABI chapter 4.2, Table 9
388 setLibcallName(RTLIB::MUL_I64, "__aeabi_lmul");
389 setLibcallName(RTLIB::SHL_I64, "__aeabi_llsl");
390 setLibcallName(RTLIB::SRL_I64, "__aeabi_llsr");
391 setLibcallName(RTLIB::SRA_I64, "__aeabi_lasr");
392 setLibcallCallingConv(RTLIB::MUL_I64, CallingConv::ARM_AAPCS);
393 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
394 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
395 setLibcallCallingConv(RTLIB::SHL_I64, CallingConv::ARM_AAPCS);
396 setLibcallCallingConv(RTLIB::SRL_I64, CallingConv::ARM_AAPCS);
397 setLibcallCallingConv(RTLIB::SRA_I64, CallingConv::ARM_AAPCS);
399 // Integer division functions
400 // RTABI chapter 4.3.1
401 setLibcallName(RTLIB::SDIV_I8, "__aeabi_idiv");
402 setLibcallName(RTLIB::SDIV_I16, "__aeabi_idiv");
403 setLibcallName(RTLIB::SDIV_I32, "__aeabi_idiv");
404 setLibcallName(RTLIB::SDIV_I64, "__aeabi_ldivmod");
405 setLibcallName(RTLIB::UDIV_I8, "__aeabi_uidiv");
406 setLibcallName(RTLIB::UDIV_I16, "__aeabi_uidiv");
407 setLibcallName(RTLIB::UDIV_I32, "__aeabi_uidiv");
408 setLibcallName(RTLIB::UDIV_I64, "__aeabi_uldivmod");
409 setLibcallCallingConv(RTLIB::SDIV_I8, CallingConv::ARM_AAPCS);
410 setLibcallCallingConv(RTLIB::SDIV_I16, CallingConv::ARM_AAPCS);
411 setLibcallCallingConv(RTLIB::SDIV_I32, CallingConv::ARM_AAPCS);
412 setLibcallCallingConv(RTLIB::SDIV_I64, CallingConv::ARM_AAPCS);
413 setLibcallCallingConv(RTLIB::UDIV_I8, CallingConv::ARM_AAPCS);
414 setLibcallCallingConv(RTLIB::UDIV_I16, CallingConv::ARM_AAPCS);
415 setLibcallCallingConv(RTLIB::UDIV_I32, CallingConv::ARM_AAPCS);
416 setLibcallCallingConv(RTLIB::UDIV_I64, CallingConv::ARM_AAPCS);
419 // RTABI chapter 4.3.4
420 setLibcallName(RTLIB::MEMCPY, "__aeabi_memcpy");
421 setLibcallName(RTLIB::MEMMOVE, "__aeabi_memmove");
422 setLibcallName(RTLIB::MEMSET, "__aeabi_memset");
423 setLibcallCallingConv(RTLIB::MEMCPY, CallingConv::ARM_AAPCS);
424 setLibcallCallingConv(RTLIB::MEMMOVE, CallingConv::ARM_AAPCS);
425 setLibcallCallingConv(RTLIB::MEMSET, CallingConv::ARM_AAPCS);
428 // Use divmod compiler-rt calls for iOS 5.0 and later.
429 if (Subtarget->getTargetTriple().getOS() == Triple::IOS &&
430 !Subtarget->getTargetTriple().isOSVersionLT(5, 0)) {
431 setLibcallName(RTLIB::SDIVREM_I32, "__divmodsi4");
432 setLibcallName(RTLIB::UDIVREM_I32, "__udivmodsi4");
435 if (Subtarget->isThumb1Only())
436 addRegisterClass(MVT::i32, ARM::tGPRRegisterClass);
438 addRegisterClass(MVT::i32, ARM::GPRRegisterClass);
439 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
440 !Subtarget->isThumb1Only()) {
441 addRegisterClass(MVT::f32, ARM::SPRRegisterClass);
442 if (!Subtarget->isFPOnlySP())
443 addRegisterClass(MVT::f64, ARM::DPRRegisterClass);
445 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
448 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
449 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
450 for (unsigned InnerVT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
451 InnerVT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++InnerVT)
452 setTruncStoreAction((MVT::SimpleValueType)VT,
453 (MVT::SimpleValueType)InnerVT, Expand);
454 setLoadExtAction(ISD::SEXTLOAD, (MVT::SimpleValueType)VT, Expand);
455 setLoadExtAction(ISD::ZEXTLOAD, (MVT::SimpleValueType)VT, Expand);
456 setLoadExtAction(ISD::EXTLOAD, (MVT::SimpleValueType)VT, Expand);
459 if (Subtarget->hasNEON()) {
460 addDRTypeForNEON(MVT::v2f32);
461 addDRTypeForNEON(MVT::v8i8);
462 addDRTypeForNEON(MVT::v4i16);
463 addDRTypeForNEON(MVT::v2i32);
464 addDRTypeForNEON(MVT::v1i64);
466 addQRTypeForNEON(MVT::v4f32);
467 addQRTypeForNEON(MVT::v2f64);
468 addQRTypeForNEON(MVT::v16i8);
469 addQRTypeForNEON(MVT::v8i16);
470 addQRTypeForNEON(MVT::v4i32);
471 addQRTypeForNEON(MVT::v2i64);
473 // v2f64 is legal so that QR subregs can be extracted as f64 elements, but
474 // neither Neon nor VFP support any arithmetic operations on it.
475 // The same with v4f32. But keep in mind that vadd, vsub, vmul are natively
476 // supported for v4f32.
477 setOperationAction(ISD::FADD, MVT::v2f64, Expand);
478 setOperationAction(ISD::FSUB, MVT::v2f64, Expand);
479 setOperationAction(ISD::FMUL, MVT::v2f64, Expand);
480 // FIXME: Code duplication: FDIV and FREM are expanded always, see
481 // ARMTargetLowering::addTypeForNEON method for details.
482 setOperationAction(ISD::FDIV, MVT::v2f64, Expand);
483 setOperationAction(ISD::FREM, MVT::v2f64, Expand);
484 // FIXME: Create unittest.
485 // In another words, find a way when "copysign" appears in DAG with vector
487 setOperationAction(ISD::FCOPYSIGN, MVT::v2f64, Expand);
488 // FIXME: Code duplication: SETCC has custom operation action, see
489 // ARMTargetLowering::addTypeForNEON method for details.
490 setOperationAction(ISD::SETCC, MVT::v2f64, Expand);
491 // FIXME: Create unittest for FNEG and for FABS.
492 setOperationAction(ISD::FNEG, MVT::v2f64, Expand);
493 setOperationAction(ISD::FABS, MVT::v2f64, Expand);
494 setOperationAction(ISD::FSQRT, MVT::v2f64, Expand);
495 setOperationAction(ISD::FSIN, MVT::v2f64, Expand);
496 setOperationAction(ISD::FCOS, MVT::v2f64, Expand);
497 setOperationAction(ISD::FPOWI, MVT::v2f64, Expand);
498 setOperationAction(ISD::FPOW, MVT::v2f64, Expand);
499 setOperationAction(ISD::FLOG, MVT::v2f64, Expand);
500 setOperationAction(ISD::FLOG2, MVT::v2f64, Expand);
501 setOperationAction(ISD::FLOG10, MVT::v2f64, Expand);
502 setOperationAction(ISD::FEXP, MVT::v2f64, Expand);
503 setOperationAction(ISD::FEXP2, MVT::v2f64, Expand);
504 // FIXME: Create unittest for FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR.
505 setOperationAction(ISD::FCEIL, MVT::v2f64, Expand);
506 setOperationAction(ISD::FTRUNC, MVT::v2f64, Expand);
507 setOperationAction(ISD::FRINT, MVT::v2f64, Expand);
508 setOperationAction(ISD::FNEARBYINT, MVT::v2f64, Expand);
509 setOperationAction(ISD::FFLOOR, MVT::v2f64, Expand);
511 setOperationAction(ISD::FSQRT, MVT::v4f32, Expand);
512 setOperationAction(ISD::FSIN, MVT::v4f32, Expand);
513 setOperationAction(ISD::FCOS, MVT::v4f32, Expand);
514 setOperationAction(ISD::FPOWI, MVT::v4f32, Expand);
515 setOperationAction(ISD::FPOW, MVT::v4f32, Expand);
516 setOperationAction(ISD::FLOG, MVT::v4f32, Expand);
517 setOperationAction(ISD::FLOG2, MVT::v4f32, Expand);
518 setOperationAction(ISD::FLOG10, MVT::v4f32, Expand);
519 setOperationAction(ISD::FEXP, MVT::v4f32, Expand);
520 setOperationAction(ISD::FEXP2, MVT::v4f32, Expand);
522 // Neon does not support some operations on v1i64 and v2i64 types.
523 setOperationAction(ISD::MUL, MVT::v1i64, Expand);
524 // Custom handling for some quad-vector types to detect VMULL.
525 setOperationAction(ISD::MUL, MVT::v8i16, Custom);
526 setOperationAction(ISD::MUL, MVT::v4i32, Custom);
527 setOperationAction(ISD::MUL, MVT::v2i64, Custom);
528 // Custom handling for some vector types to avoid expensive expansions
529 setOperationAction(ISD::SDIV, MVT::v4i16, Custom);
530 setOperationAction(ISD::SDIV, MVT::v8i8, Custom);
531 setOperationAction(ISD::UDIV, MVT::v4i16, Custom);
532 setOperationAction(ISD::UDIV, MVT::v8i8, Custom);
533 setOperationAction(ISD::SETCC, MVT::v1i64, Expand);
534 setOperationAction(ISD::SETCC, MVT::v2i64, Expand);
535 // Neon does not have single instruction SINT_TO_FP and UINT_TO_FP with
536 // a destination type that is wider than the source, and nor does
537 // it have a FP_TO_[SU]INT instruction with a narrower destination than
539 setOperationAction(ISD::SINT_TO_FP, MVT::v4i16, Custom);
540 setOperationAction(ISD::UINT_TO_FP, MVT::v4i16, Custom);
541 setOperationAction(ISD::FP_TO_UINT, MVT::v4i16, Custom);
542 setOperationAction(ISD::FP_TO_SINT, MVT::v4i16, Custom);
544 setTargetDAGCombine(ISD::INTRINSIC_VOID);
545 setTargetDAGCombine(ISD::INTRINSIC_W_CHAIN);
546 setTargetDAGCombine(ISD::INTRINSIC_WO_CHAIN);
547 setTargetDAGCombine(ISD::SHL);
548 setTargetDAGCombine(ISD::SRL);
549 setTargetDAGCombine(ISD::SRA);
550 setTargetDAGCombine(ISD::SIGN_EXTEND);
551 setTargetDAGCombine(ISD::ZERO_EXTEND);
552 setTargetDAGCombine(ISD::ANY_EXTEND);
553 setTargetDAGCombine(ISD::SELECT_CC);
554 setTargetDAGCombine(ISD::BUILD_VECTOR);
555 setTargetDAGCombine(ISD::VECTOR_SHUFFLE);
556 setTargetDAGCombine(ISD::INSERT_VECTOR_ELT);
557 setTargetDAGCombine(ISD::STORE);
558 setTargetDAGCombine(ISD::FP_TO_SINT);
559 setTargetDAGCombine(ISD::FP_TO_UINT);
560 setTargetDAGCombine(ISD::FDIV);
562 // It is legal to extload from v4i8 to v4i16 or v4i32.
563 MVT Tys[6] = {MVT::v8i8, MVT::v4i8, MVT::v2i8,
564 MVT::v4i16, MVT::v2i16,
566 for (unsigned i = 0; i < 6; ++i) {
567 setLoadExtAction(ISD::EXTLOAD, Tys[i], Legal);
568 setLoadExtAction(ISD::ZEXTLOAD, Tys[i], Legal);
569 setLoadExtAction(ISD::SEXTLOAD, Tys[i], Legal);
573 computeRegisterProperties();
575 // ARM does not have f32 extending load.
576 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
578 // ARM does not have i1 sign extending load.
579 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
581 // ARM supports all 4 flavors of integer indexed load / store.
582 if (!Subtarget->isThumb1Only()) {
583 for (unsigned im = (unsigned)ISD::PRE_INC;
584 im != (unsigned)ISD::LAST_INDEXED_MODE; ++im) {
585 setIndexedLoadAction(im, MVT::i1, Legal);
586 setIndexedLoadAction(im, MVT::i8, Legal);
587 setIndexedLoadAction(im, MVT::i16, Legal);
588 setIndexedLoadAction(im, MVT::i32, Legal);
589 setIndexedStoreAction(im, MVT::i1, Legal);
590 setIndexedStoreAction(im, MVT::i8, Legal);
591 setIndexedStoreAction(im, MVT::i16, Legal);
592 setIndexedStoreAction(im, MVT::i32, Legal);
596 // i64 operation support.
597 setOperationAction(ISD::MUL, MVT::i64, Expand);
598 setOperationAction(ISD::MULHU, MVT::i32, Expand);
599 if (Subtarget->isThumb1Only()) {
600 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
601 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
603 if (Subtarget->isThumb1Only() || !Subtarget->hasV6Ops()
604 || (Subtarget->isThumb2() && !Subtarget->hasThumb2DSP()))
605 setOperationAction(ISD::MULHS, MVT::i32, Expand);
607 setOperationAction(ISD::SHL_PARTS, MVT::i32, Custom);
608 setOperationAction(ISD::SRA_PARTS, MVT::i32, Custom);
609 setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom);
610 setOperationAction(ISD::SRL, MVT::i64, Custom);
611 setOperationAction(ISD::SRA, MVT::i64, Custom);
613 if (!Subtarget->isThumb1Only()) {
614 // FIXME: We should do this for Thumb1 as well.
615 setOperationAction(ISD::ADDC, MVT::i32, Custom);
616 setOperationAction(ISD::ADDE, MVT::i32, Custom);
617 setOperationAction(ISD::SUBC, MVT::i32, Custom);
618 setOperationAction(ISD::SUBE, MVT::i32, Custom);
621 // ARM does not have ROTL.
622 setOperationAction(ISD::ROTL, MVT::i32, Expand);
623 setOperationAction(ISD::CTTZ, MVT::i32, Custom);
624 setOperationAction(ISD::CTPOP, MVT::i32, Expand);
625 if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
626 setOperationAction(ISD::CTLZ, MVT::i32, Expand);
628 // These just redirect to CTTZ and CTLZ on ARM.
629 setOperationAction(ISD::CTTZ_ZERO_UNDEF , MVT::i32 , Expand);
630 setOperationAction(ISD::CTLZ_ZERO_UNDEF , MVT::i32 , Expand);
632 // Only ARMv6 has BSWAP.
633 if (!Subtarget->hasV6Ops())
634 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
636 // These are expanded into libcalls.
637 if (!Subtarget->hasDivide() || !Subtarget->isThumb2()) {
638 // v7M has a hardware divider
639 setOperationAction(ISD::SDIV, MVT::i32, Expand);
640 setOperationAction(ISD::UDIV, MVT::i32, Expand);
642 setOperationAction(ISD::SREM, MVT::i32, Expand);
643 setOperationAction(ISD::UREM, MVT::i32, Expand);
644 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
645 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
647 setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
648 setOperationAction(ISD::ConstantPool, MVT::i32, Custom);
649 setOperationAction(ISD::GLOBAL_OFFSET_TABLE, MVT::i32, Custom);
650 setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
651 setOperationAction(ISD::BlockAddress, MVT::i32, Custom);
653 setOperationAction(ISD::TRAP, MVT::Other, Legal);
655 // Use the default implementation.
656 setOperationAction(ISD::VASTART, MVT::Other, Custom);
657 setOperationAction(ISD::VAARG, MVT::Other, Expand);
658 setOperationAction(ISD::VACOPY, MVT::Other, Expand);
659 setOperationAction(ISD::VAEND, MVT::Other, Expand);
660 setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
661 setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
663 if (!Subtarget->isTargetDarwin()) {
664 // Non-Darwin platforms may return values in these registers via the
665 // personality function.
666 setOperationAction(ISD::EHSELECTION, MVT::i32, Expand);
667 setOperationAction(ISD::EXCEPTIONADDR, MVT::i32, Expand);
668 setExceptionPointerRegister(ARM::R0);
669 setExceptionSelectorRegister(ARM::R1);
672 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Expand);
673 // ARMv6 Thumb1 (except for CPUs that support dmb / dsb) and earlier use
674 // the default expansion.
675 // FIXME: This should be checking for v6k, not just v6.
676 if (Subtarget->hasDataBarrier() ||
677 (Subtarget->hasV6Ops() && !Subtarget->isThumb())) {
678 // membarrier needs custom lowering; the rest are legal and handled
680 setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
681 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
682 // Custom lowering for 64-bit ops
683 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i64, Custom);
684 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i64, Custom);
685 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i64, Custom);
686 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i64, Custom);
687 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Custom);
688 setOperationAction(ISD::ATOMIC_SWAP, MVT::i64, Custom);
689 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i64, Custom);
690 // Automatically insert fences (dmb ist) around ATOMIC_SWAP etc.
691 setInsertFencesForAtomic(true);
693 // Set them all for expansion, which will force libcalls.
694 setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
695 setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Expand);
696 setOperationAction(ISD::ATOMIC_CMP_SWAP, MVT::i32, Expand);
697 setOperationAction(ISD::ATOMIC_SWAP, MVT::i32, Expand);
698 setOperationAction(ISD::ATOMIC_LOAD_ADD, MVT::i32, Expand);
699 setOperationAction(ISD::ATOMIC_LOAD_SUB, MVT::i32, Expand);
700 setOperationAction(ISD::ATOMIC_LOAD_AND, MVT::i32, Expand);
701 setOperationAction(ISD::ATOMIC_LOAD_OR, MVT::i32, Expand);
702 setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i32, Expand);
703 setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i32, Expand);
704 setOperationAction(ISD::ATOMIC_LOAD_MIN, MVT::i32, Expand);
705 setOperationAction(ISD::ATOMIC_LOAD_MAX, MVT::i32, Expand);
706 setOperationAction(ISD::ATOMIC_LOAD_UMIN, MVT::i32, Expand);
707 setOperationAction(ISD::ATOMIC_LOAD_UMAX, MVT::i32, Expand);
708 // Mark ATOMIC_LOAD and ATOMIC_STORE custom so we can handle the
709 // Unordered/Monotonic case.
710 setOperationAction(ISD::ATOMIC_LOAD, MVT::i32, Custom);
711 setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Custom);
712 // Since the libcalls include locking, fold in the fences
713 setShouldFoldAtomicFences(true);
716 setOperationAction(ISD::PREFETCH, MVT::Other, Custom);
718 // Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes.
719 if (!Subtarget->hasV6Ops()) {
720 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
721 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8, Expand);
723 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
725 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
726 !Subtarget->isThumb1Only()) {
727 // Turn f64->i64 into VMOVRRD, i64 -> f64 to VMOVDRR
728 // iff target supports vfp2.
729 setOperationAction(ISD::BITCAST, MVT::i64, Custom);
730 setOperationAction(ISD::FLT_ROUNDS_, MVT::i32, Custom);
733 // We want to custom lower some of our intrinsics.
734 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
735 if (Subtarget->isTargetDarwin()) {
736 setOperationAction(ISD::EH_SJLJ_SETJMP, MVT::i32, Custom);
737 setOperationAction(ISD::EH_SJLJ_LONGJMP, MVT::Other, Custom);
738 setLibcallName(RTLIB::UNWIND_RESUME, "_Unwind_SjLj_Resume");
741 setOperationAction(ISD::SETCC, MVT::i32, Expand);
742 setOperationAction(ISD::SETCC, MVT::f32, Expand);
743 setOperationAction(ISD::SETCC, MVT::f64, Expand);
744 setOperationAction(ISD::SELECT, MVT::i32, Custom);
745 setOperationAction(ISD::SELECT, MVT::f32, Custom);
746 setOperationAction(ISD::SELECT, MVT::f64, Custom);
747 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
748 setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
749 setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
751 setOperationAction(ISD::BRCOND, MVT::Other, Expand);
752 setOperationAction(ISD::BR_CC, MVT::i32, Custom);
753 setOperationAction(ISD::BR_CC, MVT::f32, Custom);
754 setOperationAction(ISD::BR_CC, MVT::f64, Custom);
755 setOperationAction(ISD::BR_JT, MVT::Other, Custom);
757 // We don't support sin/cos/fmod/copysign/pow
758 setOperationAction(ISD::FSIN, MVT::f64, Expand);
759 setOperationAction(ISD::FSIN, MVT::f32, Expand);
760 setOperationAction(ISD::FCOS, MVT::f32, Expand);
761 setOperationAction(ISD::FCOS, MVT::f64, Expand);
762 setOperationAction(ISD::FREM, MVT::f64, Expand);
763 setOperationAction(ISD::FREM, MVT::f32, Expand);
764 if (!TM.Options.UseSoftFloat && Subtarget->hasVFP2() &&
765 !Subtarget->isThumb1Only()) {
766 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Custom);
767 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Custom);
769 setOperationAction(ISD::FPOW, MVT::f64, Expand);
770 setOperationAction(ISD::FPOW, MVT::f32, Expand);
772 setOperationAction(ISD::FMA, MVT::f64, Expand);
773 setOperationAction(ISD::FMA, MVT::f32, Expand);
775 // Various VFP goodness
776 if (!TM.Options.UseSoftFloat && !Subtarget->isThumb1Only()) {
777 // int <-> fp are custom expanded into bit_convert + ARMISD ops.
778 if (Subtarget->hasVFP2()) {
779 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
780 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
781 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
782 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
784 // Special handling for half-precision FP.
785 if (!Subtarget->hasFP16()) {
786 setOperationAction(ISD::FP16_TO_FP32, MVT::f32, Expand);
787 setOperationAction(ISD::FP32_TO_FP16, MVT::i32, Expand);
791 // We have target-specific dag combine patterns for the following nodes:
792 // ARMISD::VMOVRRD - No need to call setTargetDAGCombine
793 setTargetDAGCombine(ISD::ADD);
794 setTargetDAGCombine(ISD::SUB);
795 setTargetDAGCombine(ISD::MUL);
797 if (Subtarget->hasV6T2Ops() || Subtarget->hasNEON()) {
798 setTargetDAGCombine(ISD::AND);
799 setTargetDAGCombine(ISD::OR);
800 setTargetDAGCombine(ISD::XOR);
803 if (Subtarget->hasV6Ops())
804 setTargetDAGCombine(ISD::SRL);
806 setStackPointerRegisterToSaveRestore(ARM::SP);
808 if (TM.Options.UseSoftFloat || Subtarget->isThumb1Only() ||
809 !Subtarget->hasVFP2())
810 setSchedulingPreference(Sched::RegPressure);
812 setSchedulingPreference(Sched::Hybrid);
814 //// temporary - rewrite interface to use type
815 maxStoresPerMemcpy = maxStoresPerMemcpyOptSize = 1;
816 maxStoresPerMemset = 16;
817 maxStoresPerMemsetOptSize = Subtarget->isTargetDarwin() ? 8 : 4;
819 // On ARM arguments smaller than 4 bytes are extended, so all arguments
820 // are at least 4 bytes aligned.
821 setMinStackArgumentAlignment(4);
823 benefitFromCodePlacementOpt = true;
825 setMinFunctionAlignment(Subtarget->isThumb() ? 1 : 2);
828 // FIXME: It might make sense to define the representative register class as the
829 // nearest super-register that has a non-null superset. For example, DPR_VFP2 is
830 // a super-register of SPR, and DPR is a superset if DPR_VFP2. Consequently,
831 // SPR's representative would be DPR_VFP2. This should work well if register
832 // pressure tracking were modified such that a register use would increment the
833 // pressure of the register class's representative and all of it's super
834 // classes' representatives transitively. We have not implemented this because
835 // of the difficulty prior to coalescing of modeling operand register classes
836 // due to the common occurrence of cross class copies and subregister insertions
838 std::pair<const TargetRegisterClass*, uint8_t>
839 ARMTargetLowering::findRepresentativeClass(EVT VT) const{
840 const TargetRegisterClass *RRC = 0;
842 switch (VT.getSimpleVT().SimpleTy) {
844 return TargetLowering::findRepresentativeClass(VT);
845 // Use DPR as representative register class for all floating point
846 // and vector types. Since there are 32 SPR registers and 32 DPR registers so
847 // the cost is 1 for both f32 and f64.
848 case MVT::f32: case MVT::f64: case MVT::v8i8: case MVT::v4i16:
849 case MVT::v2i32: case MVT::v1i64: case MVT::v2f32:
850 RRC = ARM::DPRRegisterClass;
851 // When NEON is used for SP, only half of the register file is available
852 // because operations that define both SP and DP results will be constrained
853 // to the VFP2 class (D0-D15). We currently model this constraint prior to
854 // coalescing by double-counting the SP regs. See the FIXME above.
855 if (Subtarget->useNEONForSinglePrecisionFP())
858 case MVT::v16i8: case MVT::v8i16: case MVT::v4i32: case MVT::v2i64:
859 case MVT::v4f32: case MVT::v2f64:
860 RRC = ARM::DPRRegisterClass;
864 RRC = ARM::DPRRegisterClass;
868 RRC = ARM::DPRRegisterClass;
872 return std::make_pair(RRC, Cost);
875 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {
878 case ARMISD::Wrapper: return "ARMISD::Wrapper";
879 case ARMISD::WrapperDYN: return "ARMISD::WrapperDYN";
880 case ARMISD::WrapperPIC: return "ARMISD::WrapperPIC";
881 case ARMISD::WrapperJT: return "ARMISD::WrapperJT";
882 case ARMISD::CALL: return "ARMISD::CALL";
883 case ARMISD::CALL_PRED: return "ARMISD::CALL_PRED";
884 case ARMISD::CALL_NOLINK: return "ARMISD::CALL_NOLINK";
885 case ARMISD::tCALL: return "ARMISD::tCALL";
886 case ARMISD::BRCOND: return "ARMISD::BRCOND";
887 case ARMISD::BR_JT: return "ARMISD::BR_JT";
888 case ARMISD::BR2_JT: return "ARMISD::BR2_JT";
889 case ARMISD::RET_FLAG: return "ARMISD::RET_FLAG";
890 case ARMISD::PIC_ADD: return "ARMISD::PIC_ADD";
891 case ARMISD::CMP: return "ARMISD::CMP";
892 case ARMISD::CMPZ: return "ARMISD::CMPZ";
893 case ARMISD::CMPFP: return "ARMISD::CMPFP";
894 case ARMISD::CMPFPw0: return "ARMISD::CMPFPw0";
895 case ARMISD::BCC_i64: return "ARMISD::BCC_i64";
896 case ARMISD::FMSTAT: return "ARMISD::FMSTAT";
898 case ARMISD::CMOV: return "ARMISD::CMOV";
899 case ARMISD::CAND: return "ARMISD::CAND";
900 case ARMISD::COR: return "ARMISD::COR";
901 case ARMISD::CXOR: return "ARMISD::CXOR";
903 case ARMISD::RBIT: return "ARMISD::RBIT";
905 case ARMISD::FTOSI: return "ARMISD::FTOSI";
906 case ARMISD::FTOUI: return "ARMISD::FTOUI";
907 case ARMISD::SITOF: return "ARMISD::SITOF";
908 case ARMISD::UITOF: return "ARMISD::UITOF";
910 case ARMISD::SRL_FLAG: return "ARMISD::SRL_FLAG";
911 case ARMISD::SRA_FLAG: return "ARMISD::SRA_FLAG";
912 case ARMISD::RRX: return "ARMISD::RRX";
914 case ARMISD::ADDC: return "ARMISD::ADDC";
915 case ARMISD::ADDE: return "ARMISD::ADDE";
916 case ARMISD::SUBC: return "ARMISD::SUBC";
917 case ARMISD::SUBE: return "ARMISD::SUBE";
919 case ARMISD::VMOVRRD: return "ARMISD::VMOVRRD";
920 case ARMISD::VMOVDRR: return "ARMISD::VMOVDRR";
922 case ARMISD::EH_SJLJ_SETJMP: return "ARMISD::EH_SJLJ_SETJMP";
923 case ARMISD::EH_SJLJ_LONGJMP:return "ARMISD::EH_SJLJ_LONGJMP";
925 case ARMISD::TC_RETURN: return "ARMISD::TC_RETURN";
927 case ARMISD::THREAD_POINTER:return "ARMISD::THREAD_POINTER";
929 case ARMISD::DYN_ALLOC: return "ARMISD::DYN_ALLOC";
931 case ARMISD::MEMBARRIER: return "ARMISD::MEMBARRIER";
932 case ARMISD::MEMBARRIER_MCR: return "ARMISD::MEMBARRIER_MCR";
934 case ARMISD::PRELOAD: return "ARMISD::PRELOAD";
936 case ARMISD::VCEQ: return "ARMISD::VCEQ";
937 case ARMISD::VCEQZ: return "ARMISD::VCEQZ";
938 case ARMISD::VCGE: return "ARMISD::VCGE";
939 case ARMISD::VCGEZ: return "ARMISD::VCGEZ";
940 case ARMISD::VCLEZ: return "ARMISD::VCLEZ";
941 case ARMISD::VCGEU: return "ARMISD::VCGEU";
942 case ARMISD::VCGT: return "ARMISD::VCGT";
943 case ARMISD::VCGTZ: return "ARMISD::VCGTZ";
944 case ARMISD::VCLTZ: return "ARMISD::VCLTZ";
945 case ARMISD::VCGTU: return "ARMISD::VCGTU";
946 case ARMISD::VTST: return "ARMISD::VTST";
948 case ARMISD::VSHL: return "ARMISD::VSHL";
949 case ARMISD::VSHRs: return "ARMISD::VSHRs";
950 case ARMISD::VSHRu: return "ARMISD::VSHRu";
951 case ARMISD::VSHLLs: return "ARMISD::VSHLLs";
952 case ARMISD::VSHLLu: return "ARMISD::VSHLLu";
953 case ARMISD::VSHLLi: return "ARMISD::VSHLLi";
954 case ARMISD::VSHRN: return "ARMISD::VSHRN";
955 case ARMISD::VRSHRs: return "ARMISD::VRSHRs";
956 case ARMISD::VRSHRu: return "ARMISD::VRSHRu";
957 case ARMISD::VRSHRN: return "ARMISD::VRSHRN";
958 case ARMISD::VQSHLs: return "ARMISD::VQSHLs";
959 case ARMISD::VQSHLu: return "ARMISD::VQSHLu";
960 case ARMISD::VQSHLsu: return "ARMISD::VQSHLsu";
961 case ARMISD::VQSHRNs: return "ARMISD::VQSHRNs";
962 case ARMISD::VQSHRNu: return "ARMISD::VQSHRNu";
963 case ARMISD::VQSHRNsu: return "ARMISD::VQSHRNsu";
964 case ARMISD::VQRSHRNs: return "ARMISD::VQRSHRNs";
965 case ARMISD::VQRSHRNu: return "ARMISD::VQRSHRNu";
966 case ARMISD::VQRSHRNsu: return "ARMISD::VQRSHRNsu";
967 case ARMISD::VGETLANEu: return "ARMISD::VGETLANEu";
968 case ARMISD::VGETLANEs: return "ARMISD::VGETLANEs";
969 case ARMISD::VMOVIMM: return "ARMISD::VMOVIMM";
970 case ARMISD::VMVNIMM: return "ARMISD::VMVNIMM";
971 case ARMISD::VMOVFPIMM: return "ARMISD::VMOVFPIMM";
972 case ARMISD::VDUP: return "ARMISD::VDUP";
973 case ARMISD::VDUPLANE: return "ARMISD::VDUPLANE";
974 case ARMISD::VEXT: return "ARMISD::VEXT";
975 case ARMISD::VREV64: return "ARMISD::VREV64";
976 case ARMISD::VREV32: return "ARMISD::VREV32";
977 case ARMISD::VREV16: return "ARMISD::VREV16";
978 case ARMISD::VZIP: return "ARMISD::VZIP";
979 case ARMISD::VUZP: return "ARMISD::VUZP";
980 case ARMISD::VTRN: return "ARMISD::VTRN";
981 case ARMISD::VTBL1: return "ARMISD::VTBL1";
982 case ARMISD::VTBL2: return "ARMISD::VTBL2";
983 case ARMISD::VMULLs: return "ARMISD::VMULLs";
984 case ARMISD::VMULLu: return "ARMISD::VMULLu";
985 case ARMISD::BUILD_VECTOR: return "ARMISD::BUILD_VECTOR";
986 case ARMISD::FMAX: return "ARMISD::FMAX";
987 case ARMISD::FMIN: return "ARMISD::FMIN";
988 case ARMISD::BFI: return "ARMISD::BFI";
989 case ARMISD::VORRIMM: return "ARMISD::VORRIMM";
990 case ARMISD::VBICIMM: return "ARMISD::VBICIMM";
991 case ARMISD::VBSL: return "ARMISD::VBSL";
992 case ARMISD::VLD2DUP: return "ARMISD::VLD2DUP";
993 case ARMISD::VLD3DUP: return "ARMISD::VLD3DUP";
994 case ARMISD::VLD4DUP: return "ARMISD::VLD4DUP";
995 case ARMISD::VLD1_UPD: return "ARMISD::VLD1_UPD";
996 case ARMISD::VLD2_UPD: return "ARMISD::VLD2_UPD";
997 case ARMISD::VLD3_UPD: return "ARMISD::VLD3_UPD";
998 case ARMISD::VLD4_UPD: return "ARMISD::VLD4_UPD";
999 case ARMISD::VLD2LN_UPD: return "ARMISD::VLD2LN_UPD";
1000 case ARMISD::VLD3LN_UPD: return "ARMISD::VLD3LN_UPD";
1001 case ARMISD::VLD4LN_UPD: return "ARMISD::VLD4LN_UPD";
1002 case ARMISD::VLD2DUP_UPD: return "ARMISD::VLD2DUP_UPD";
1003 case ARMISD::VLD3DUP_UPD: return "ARMISD::VLD3DUP_UPD";
1004 case ARMISD::VLD4DUP_UPD: return "ARMISD::VLD4DUP_UPD";
1005 case ARMISD::VST1_UPD: return "ARMISD::VST1_UPD";
1006 case ARMISD::VST2_UPD: return "ARMISD::VST2_UPD";
1007 case ARMISD::VST3_UPD: return "ARMISD::VST3_UPD";
1008 case ARMISD::VST4_UPD: return "ARMISD::VST4_UPD";
1009 case ARMISD::VST2LN_UPD: return "ARMISD::VST2LN_UPD";
1010 case ARMISD::VST3LN_UPD: return "ARMISD::VST3LN_UPD";
1011 case ARMISD::VST4LN_UPD: return "ARMISD::VST4LN_UPD";
1015 EVT ARMTargetLowering::getSetCCResultType(EVT VT) const {
1016 if (!VT.isVector()) return getPointerTy();
1017 return VT.changeVectorElementTypeToInteger();
1020 /// getRegClassFor - Return the register class that should be used for the
1021 /// specified value type.
1022 const TargetRegisterClass *ARMTargetLowering::getRegClassFor(EVT VT) const {
1023 // Map v4i64 to QQ registers but do not make the type legal. Similarly map
1024 // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
1025 // load / store 4 to 8 consecutive D registers.
1026 if (Subtarget->hasNEON()) {
1027 if (VT == MVT::v4i64)
1028 return ARM::QQPRRegisterClass;
1029 else if (VT == MVT::v8i64)
1030 return ARM::QQQQPRRegisterClass;
1032 return TargetLowering::getRegClassFor(VT);
1035 // Create a fast isel object.
1037 ARMTargetLowering::createFastISel(FunctionLoweringInfo &funcInfo) const {
1038 return ARM::createFastISel(funcInfo);
1041 /// getMaximalGlobalOffset - Returns the maximal possible offset which can
1042 /// be used for loads / stores from the global.
1043 unsigned ARMTargetLowering::getMaximalGlobalOffset() const {
1044 return (Subtarget->isThumb1Only() ? 127 : 4095);
1047 Sched::Preference ARMTargetLowering::getSchedulingPreference(SDNode *N) const {
1048 unsigned NumVals = N->getNumValues();
1050 return Sched::RegPressure;
1052 for (unsigned i = 0; i != NumVals; ++i) {
1053 EVT VT = N->getValueType(i);
1054 if (VT == MVT::Glue || VT == MVT::Other)
1056 if (VT.isFloatingPoint() || VT.isVector())
1060 if (!N->isMachineOpcode())
1061 return Sched::RegPressure;
1063 // Load are scheduled for latency even if there instruction itinerary
1064 // is not available.
1065 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
1066 const MCInstrDesc &MCID = TII->get(N->getMachineOpcode());
1068 if (MCID.getNumDefs() == 0)
1069 return Sched::RegPressure;
1070 if (!Itins->isEmpty() &&
1071 Itins->getOperandCycle(MCID.getSchedClass(), 0) > 2)
1074 return Sched::RegPressure;
1077 //===----------------------------------------------------------------------===//
1079 //===----------------------------------------------------------------------===//
1081 /// IntCCToARMCC - Convert a DAG integer condition code to an ARM CC
1082 static ARMCC::CondCodes IntCCToARMCC(ISD::CondCode CC) {
1084 default: llvm_unreachable("Unknown condition code!");
1085 case ISD::SETNE: return ARMCC::NE;
1086 case ISD::SETEQ: return ARMCC::EQ;
1087 case ISD::SETGT: return ARMCC::GT;
1088 case ISD::SETGE: return ARMCC::GE;
1089 case ISD::SETLT: return ARMCC::LT;
1090 case ISD::SETLE: return ARMCC::LE;
1091 case ISD::SETUGT: return ARMCC::HI;
1092 case ISD::SETUGE: return ARMCC::HS;
1093 case ISD::SETULT: return ARMCC::LO;
1094 case ISD::SETULE: return ARMCC::LS;
1098 /// FPCCToARMCC - Convert a DAG fp condition code to an ARM CC.
1099 static void FPCCToARMCC(ISD::CondCode CC, ARMCC::CondCodes &CondCode,
1100 ARMCC::CondCodes &CondCode2) {
1101 CondCode2 = ARMCC::AL;
1103 default: llvm_unreachable("Unknown FP condition!");
1105 case ISD::SETOEQ: CondCode = ARMCC::EQ; break;
1107 case ISD::SETOGT: CondCode = ARMCC::GT; break;
1109 case ISD::SETOGE: CondCode = ARMCC::GE; break;
1110 case ISD::SETOLT: CondCode = ARMCC::MI; break;
1111 case ISD::SETOLE: CondCode = ARMCC::LS; break;
1112 case ISD::SETONE: CondCode = ARMCC::MI; CondCode2 = ARMCC::GT; break;
1113 case ISD::SETO: CondCode = ARMCC::VC; break;
1114 case ISD::SETUO: CondCode = ARMCC::VS; break;
1115 case ISD::SETUEQ: CondCode = ARMCC::EQ; CondCode2 = ARMCC::VS; break;
1116 case ISD::SETUGT: CondCode = ARMCC::HI; break;
1117 case ISD::SETUGE: CondCode = ARMCC::PL; break;
1119 case ISD::SETULT: CondCode = ARMCC::LT; break;
1121 case ISD::SETULE: CondCode = ARMCC::LE; break;
1123 case ISD::SETUNE: CondCode = ARMCC::NE; break;
1127 //===----------------------------------------------------------------------===//
1128 // Calling Convention Implementation
1129 //===----------------------------------------------------------------------===//
1131 #include "ARMGenCallingConv.inc"
1133 /// CCAssignFnForNode - Selects the correct CCAssignFn for a the
1134 /// given CallingConvention value.
1135 CCAssignFn *ARMTargetLowering::CCAssignFnForNode(CallingConv::ID CC,
1137 bool isVarArg) const {
1140 llvm_unreachable("Unsupported calling convention");
1141 case CallingConv::Fast:
1142 if (Subtarget->hasVFP2() && !isVarArg) {
1143 if (!Subtarget->isAAPCS_ABI())
1144 return (Return ? RetFastCC_ARM_APCS : FastCC_ARM_APCS);
1145 // For AAPCS ABI targets, just use VFP variant of the calling convention.
1146 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1149 case CallingConv::C: {
1150 // Use target triple & subtarget features to do actual dispatch.
1151 if (!Subtarget->isAAPCS_ABI())
1152 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1153 else if (Subtarget->hasVFP2() &&
1154 getTargetMachine().Options.FloatABIType == FloatABI::Hard &&
1156 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1157 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1159 case CallingConv::ARM_AAPCS_VFP:
1161 return (Return ? RetCC_ARM_AAPCS_VFP : CC_ARM_AAPCS_VFP);
1163 case CallingConv::ARM_AAPCS:
1164 return (Return ? RetCC_ARM_AAPCS : CC_ARM_AAPCS);
1165 case CallingConv::ARM_APCS:
1166 return (Return ? RetCC_ARM_APCS : CC_ARM_APCS);
1170 /// LowerCallResult - Lower the result values of a call into the
1171 /// appropriate copies out of appropriate physical registers.
1173 ARMTargetLowering::LowerCallResult(SDValue Chain, SDValue InFlag,
1174 CallingConv::ID CallConv, bool isVarArg,
1175 const SmallVectorImpl<ISD::InputArg> &Ins,
1176 DebugLoc dl, SelectionDAG &DAG,
1177 SmallVectorImpl<SDValue> &InVals) const {
1179 // Assign locations to each value returned by this call.
1180 SmallVector<CCValAssign, 16> RVLocs;
1181 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1182 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1183 CCInfo.AnalyzeCallResult(Ins,
1184 CCAssignFnForNode(CallConv, /* Return*/ true,
1187 // Copy all of the result registers out of their specified physreg.
1188 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1189 CCValAssign VA = RVLocs[i];
1192 if (VA.needsCustom()) {
1193 // Handle f64 or half of a v2f64.
1194 SDValue Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1196 Chain = Lo.getValue(1);
1197 InFlag = Lo.getValue(2);
1198 VA = RVLocs[++i]; // skip ahead to next loc
1199 SDValue Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32,
1201 Chain = Hi.getValue(1);
1202 InFlag = Hi.getValue(2);
1203 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1205 if (VA.getLocVT() == MVT::v2f64) {
1206 SDValue Vec = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
1207 Vec = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1208 DAG.getConstant(0, MVT::i32));
1210 VA = RVLocs[++i]; // skip ahead to next loc
1211 Lo = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1212 Chain = Lo.getValue(1);
1213 InFlag = Lo.getValue(2);
1214 VA = RVLocs[++i]; // skip ahead to next loc
1215 Hi = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), MVT::i32, InFlag);
1216 Chain = Hi.getValue(1);
1217 InFlag = Hi.getValue(2);
1218 Val = DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
1219 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Vec, Val,
1220 DAG.getConstant(1, MVT::i32));
1223 Val = DAG.getCopyFromReg(Chain, dl, VA.getLocReg(), VA.getLocVT(),
1225 Chain = Val.getValue(1);
1226 InFlag = Val.getValue(2);
1229 switch (VA.getLocInfo()) {
1230 default: llvm_unreachable("Unknown loc info!");
1231 case CCValAssign::Full: break;
1232 case CCValAssign::BCvt:
1233 Val = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), Val);
1237 InVals.push_back(Val);
1243 /// LowerMemOpCallTo - Store the argument to the stack.
1245 ARMTargetLowering::LowerMemOpCallTo(SDValue Chain,
1246 SDValue StackPtr, SDValue Arg,
1247 DebugLoc dl, SelectionDAG &DAG,
1248 const CCValAssign &VA,
1249 ISD::ArgFlagsTy Flags) const {
1250 unsigned LocMemOffset = VA.getLocMemOffset();
1251 SDValue PtrOff = DAG.getIntPtrConstant(LocMemOffset);
1252 PtrOff = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr, PtrOff);
1253 return DAG.getStore(Chain, dl, Arg, PtrOff,
1254 MachinePointerInfo::getStack(LocMemOffset),
1258 void ARMTargetLowering::PassF64ArgInRegs(DebugLoc dl, SelectionDAG &DAG,
1259 SDValue Chain, SDValue &Arg,
1260 RegsToPassVector &RegsToPass,
1261 CCValAssign &VA, CCValAssign &NextVA,
1263 SmallVector<SDValue, 8> &MemOpChains,
1264 ISD::ArgFlagsTy Flags) const {
1266 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1267 DAG.getVTList(MVT::i32, MVT::i32), Arg);
1268 RegsToPass.push_back(std::make_pair(VA.getLocReg(), fmrrd));
1270 if (NextVA.isRegLoc())
1271 RegsToPass.push_back(std::make_pair(NextVA.getLocReg(), fmrrd.getValue(1)));
1273 assert(NextVA.isMemLoc());
1274 if (StackPtr.getNode() == 0)
1275 StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1277 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, fmrrd.getValue(1),
1283 /// LowerCall - Lowering a call into a callseq_start <-
1284 /// ARMISD:CALL <- callseq_end chain. Also add input and output parameter
1287 ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
1288 CallingConv::ID CallConv, bool isVarArg,
1289 bool doesNotRet, bool &isTailCall,
1290 const SmallVectorImpl<ISD::OutputArg> &Outs,
1291 const SmallVectorImpl<SDValue> &OutVals,
1292 const SmallVectorImpl<ISD::InputArg> &Ins,
1293 DebugLoc dl, SelectionDAG &DAG,
1294 SmallVectorImpl<SDValue> &InVals) const {
1295 MachineFunction &MF = DAG.getMachineFunction();
1296 bool IsStructRet = (Outs.empty()) ? false : Outs[0].Flags.isSRet();
1297 bool IsSibCall = false;
1298 // Disable tail calls if they're not supported.
1299 if (!EnableARMTailCalls && !Subtarget->supportsTailCall())
1302 // Check if it's really possible to do a tail call.
1303 isTailCall = IsEligibleForTailCallOptimization(Callee, CallConv,
1304 isVarArg, IsStructRet, MF.getFunction()->hasStructRetAttr(),
1305 Outs, OutVals, Ins, DAG);
1306 // We don't support GuaranteedTailCallOpt for ARM, only automatically
1307 // detected sibcalls.
1314 // Analyze operands of the call, assigning locations to each operand.
1315 SmallVector<CCValAssign, 16> ArgLocs;
1316 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1317 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1318 CCInfo.AnalyzeCallOperands(Outs,
1319 CCAssignFnForNode(CallConv, /* Return*/ false,
1322 // Get a count of how many bytes are to be pushed on the stack.
1323 unsigned NumBytes = CCInfo.getNextStackOffset();
1325 // For tail calls, memory operands are available in our caller's stack.
1329 // Adjust the stack pointer for the new arguments...
1330 // These operations are automatically eliminated by the prolog/epilog pass
1332 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumBytes, true));
1334 SDValue StackPtr = DAG.getCopyFromReg(Chain, dl, ARM::SP, getPointerTy());
1336 RegsToPassVector RegsToPass;
1337 SmallVector<SDValue, 8> MemOpChains;
1339 // Walk the register/memloc assignments, inserting copies/loads. In the case
1340 // of tail call optimization, arguments are handled later.
1341 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1343 ++i, ++realArgIdx) {
1344 CCValAssign &VA = ArgLocs[i];
1345 SDValue Arg = OutVals[realArgIdx];
1346 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1347 bool isByVal = Flags.isByVal();
1349 // Promote the value if needed.
1350 switch (VA.getLocInfo()) {
1351 default: llvm_unreachable("Unknown loc info!");
1352 case CCValAssign::Full: break;
1353 case CCValAssign::SExt:
1354 Arg = DAG.getNode(ISD::SIGN_EXTEND, dl, VA.getLocVT(), Arg);
1356 case CCValAssign::ZExt:
1357 Arg = DAG.getNode(ISD::ZERO_EXTEND, dl, VA.getLocVT(), Arg);
1359 case CCValAssign::AExt:
1360 Arg = DAG.getNode(ISD::ANY_EXTEND, dl, VA.getLocVT(), Arg);
1362 case CCValAssign::BCvt:
1363 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1367 // f64 and v2f64 might be passed in i32 pairs and must be split into pieces
1368 if (VA.needsCustom()) {
1369 if (VA.getLocVT() == MVT::v2f64) {
1370 SDValue Op0 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1371 DAG.getConstant(0, MVT::i32));
1372 SDValue Op1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1373 DAG.getConstant(1, MVT::i32));
1375 PassF64ArgInRegs(dl, DAG, Chain, Op0, RegsToPass,
1376 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1378 VA = ArgLocs[++i]; // skip ahead to next loc
1379 if (VA.isRegLoc()) {
1380 PassF64ArgInRegs(dl, DAG, Chain, Op1, RegsToPass,
1381 VA, ArgLocs[++i], StackPtr, MemOpChains, Flags);
1383 assert(VA.isMemLoc());
1385 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Op1,
1386 dl, DAG, VA, Flags));
1389 PassF64ArgInRegs(dl, DAG, Chain, Arg, RegsToPass, VA, ArgLocs[++i],
1390 StackPtr, MemOpChains, Flags);
1392 } else if (VA.isRegLoc()) {
1393 RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
1394 } else if (isByVal) {
1395 assert(VA.isMemLoc());
1396 unsigned offset = 0;
1398 // True if this byval aggregate will be split between registers
1400 if (CCInfo.isFirstByValRegValid()) {
1401 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1403 for (i = 0, j = CCInfo.getFirstByValReg(); j < ARM::R4; i++, j++) {
1404 SDValue Const = DAG.getConstant(4*i, MVT::i32);
1405 SDValue AddArg = DAG.getNode(ISD::ADD, dl, PtrVT, Arg, Const);
1406 SDValue Load = DAG.getLoad(PtrVT, dl, Chain, AddArg,
1407 MachinePointerInfo(),
1408 false, false, false, 0);
1409 MemOpChains.push_back(Load.getValue(1));
1410 RegsToPass.push_back(std::make_pair(j, Load));
1412 offset = ARM::R4 - CCInfo.getFirstByValReg();
1413 CCInfo.clearFirstByValReg();
1416 unsigned LocMemOffset = VA.getLocMemOffset();
1417 SDValue StkPtrOff = DAG.getIntPtrConstant(LocMemOffset);
1418 SDValue Dst = DAG.getNode(ISD::ADD, dl, getPointerTy(), StackPtr,
1420 SDValue SrcOffset = DAG.getIntPtrConstant(4*offset);
1421 SDValue Src = DAG.getNode(ISD::ADD, dl, getPointerTy(), Arg, SrcOffset);
1422 SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset,
1424 MemOpChains.push_back(DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode,
1425 Flags.getByValAlign(),
1426 /*isVolatile=*/false,
1427 /*AlwaysInline=*/false,
1428 MachinePointerInfo(0),
1429 MachinePointerInfo(0)));
1431 } else if (!IsSibCall) {
1432 assert(VA.isMemLoc());
1434 MemOpChains.push_back(LowerMemOpCallTo(Chain, StackPtr, Arg,
1435 dl, DAG, VA, Flags));
1439 if (!MemOpChains.empty())
1440 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1441 &MemOpChains[0], MemOpChains.size());
1443 // Build a sequence of copy-to-reg nodes chained together with token chain
1444 // and flag operands which copy the outgoing args into the appropriate regs.
1446 // Tail call byval lowering might overwrite argument registers so in case of
1447 // tail call optimization the copies to registers are lowered later.
1449 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1450 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1451 RegsToPass[i].second, InFlag);
1452 InFlag = Chain.getValue(1);
1455 // For tail calls lower the arguments to the 'real' stack slot.
1457 // Force all the incoming stack arguments to be loaded from the stack
1458 // before any new outgoing arguments are stored to the stack, because the
1459 // outgoing stack slots may alias the incoming argument stack slots, and
1460 // the alias isn't otherwise explicit. This is slightly more conservative
1461 // than necessary, because it means that each store effectively depends
1462 // on every argument instead of just those arguments it would clobber.
1464 // Do not flag preceding copytoreg stuff together with the following stuff.
1466 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1467 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1468 RegsToPass[i].second, InFlag);
1469 InFlag = Chain.getValue(1);
1474 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1475 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1476 // node so that legalize doesn't hack it.
1477 bool isDirect = false;
1478 bool isARMFunc = false;
1479 bool isLocalARMFunc = false;
1480 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
1482 if (EnableARMLongCalls) {
1483 assert (getTargetMachine().getRelocationModel() == Reloc::Static
1484 && "long-calls with non-static relocation model!");
1485 // Handle a global address or an external symbol. If it's not one of
1486 // those, the target's already in a register, so we don't need to do
1488 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1489 const GlobalValue *GV = G->getGlobal();
1490 // Create a constant pool entry for the callee address
1491 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1492 ARMConstantPoolValue *CPV =
1493 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 0);
1495 // Get the address of the callee into a register
1496 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1497 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1498 Callee = DAG.getLoad(getPointerTy(), dl,
1499 DAG.getEntryNode(), CPAddr,
1500 MachinePointerInfo::getConstantPool(),
1501 false, false, false, 0);
1502 } else if (ExternalSymbolSDNode *S=dyn_cast<ExternalSymbolSDNode>(Callee)) {
1503 const char *Sym = S->getSymbol();
1505 // Create a constant pool entry for the callee address
1506 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1507 ARMConstantPoolValue *CPV =
1508 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1509 ARMPCLabelIndex, 0);
1510 // Get the address of the callee into a register
1511 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1512 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1513 Callee = DAG.getLoad(getPointerTy(), dl,
1514 DAG.getEntryNode(), CPAddr,
1515 MachinePointerInfo::getConstantPool(),
1516 false, false, false, 0);
1518 } else if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1519 const GlobalValue *GV = G->getGlobal();
1521 bool isExt = GV->isDeclaration() || GV->isWeakForLinker();
1522 bool isStub = (isExt && Subtarget->isTargetDarwin()) &&
1523 getTargetMachine().getRelocationModel() != Reloc::Static;
1524 isARMFunc = !Subtarget->isThumb() || isStub;
1525 // ARM call to a local ARM function is predicable.
1526 isLocalARMFunc = !Subtarget->isThumb() && (!isExt || !ARMInterworking);
1527 // tBX takes a register source operand.
1528 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1529 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1530 ARMConstantPoolValue *CPV =
1531 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue, 4);
1532 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1533 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1534 Callee = DAG.getLoad(getPointerTy(), dl,
1535 DAG.getEntryNode(), CPAddr,
1536 MachinePointerInfo::getConstantPool(),
1537 false, false, false, 0);
1538 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1539 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1540 getPointerTy(), Callee, PICLabel);
1542 // On ELF targets for PIC code, direct calls should go through the PLT
1543 unsigned OpFlags = 0;
1544 if (Subtarget->isTargetELF() &&
1545 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1546 OpFlags = ARMII::MO_PLT;
1547 Callee = DAG.getTargetGlobalAddress(GV, dl, getPointerTy(), 0, OpFlags);
1549 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1551 bool isStub = Subtarget->isTargetDarwin() &&
1552 getTargetMachine().getRelocationModel() != Reloc::Static;
1553 isARMFunc = !Subtarget->isThumb() || isStub;
1554 // tBX takes a register source operand.
1555 const char *Sym = S->getSymbol();
1556 if (isARMFunc && Subtarget->isThumb1Only() && !Subtarget->hasV5TOps()) {
1557 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
1558 ARMConstantPoolValue *CPV =
1559 ARMConstantPoolSymbol::Create(*DAG.getContext(), Sym,
1560 ARMPCLabelIndex, 4);
1561 SDValue CPAddr = DAG.getTargetConstantPool(CPV, getPointerTy(), 4);
1562 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
1563 Callee = DAG.getLoad(getPointerTy(), dl,
1564 DAG.getEntryNode(), CPAddr,
1565 MachinePointerInfo::getConstantPool(),
1566 false, false, false, 0);
1567 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
1568 Callee = DAG.getNode(ARMISD::PIC_ADD, dl,
1569 getPointerTy(), Callee, PICLabel);
1571 unsigned OpFlags = 0;
1572 // On ELF targets for PIC code, direct calls should go through the PLT
1573 if (Subtarget->isTargetELF() &&
1574 getTargetMachine().getRelocationModel() == Reloc::PIC_)
1575 OpFlags = ARMII::MO_PLT;
1576 Callee = DAG.getTargetExternalSymbol(Sym, getPointerTy(), OpFlags);
1580 // FIXME: handle tail calls differently.
1582 if (Subtarget->isThumb()) {
1583 if ((!isDirect || isARMFunc) && !Subtarget->hasV5TOps())
1584 CallOpc = ARMISD::CALL_NOLINK;
1585 else if (doesNotRet && isDirect && !isARMFunc &&
1586 Subtarget->hasRAS() && !Subtarget->isThumb1Only())
1587 // "mov lr, pc; b _foo" to avoid confusing the RSP
1588 CallOpc = ARMISD::CALL_NOLINK;
1590 CallOpc = isARMFunc ? ARMISD::CALL : ARMISD::tCALL;
1592 if (!isDirect && !Subtarget->hasV5TOps()) {
1593 CallOpc = ARMISD::CALL_NOLINK;
1594 } else if (doesNotRet && isDirect && Subtarget->hasRAS())
1595 // "mov lr, pc; b _foo" to avoid confusing the RSP
1596 CallOpc = ARMISD::CALL_NOLINK;
1598 CallOpc = isLocalARMFunc ? ARMISD::CALL_PRED : ARMISD::CALL;
1601 std::vector<SDValue> Ops;
1602 Ops.push_back(Chain);
1603 Ops.push_back(Callee);
1605 // Add argument registers to the end of the list so that they are known live
1607 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1608 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1609 RegsToPass[i].second.getValueType()));
1611 // Add a register mask operand representing the call-preserved registers.
1612 const TargetRegisterInfo *TRI = getTargetMachine().getRegisterInfo();
1613 const uint32_t *Mask = TRI->getCallPreservedMask(CallConv);
1614 assert(Mask && "Missing call preserved mask for calling convention");
1615 Ops.push_back(DAG.getRegisterMask(Mask));
1617 if (InFlag.getNode())
1618 Ops.push_back(InFlag);
1620 SDVTList NodeTys = DAG.getVTList(MVT::Other, MVT::Glue);
1622 return DAG.getNode(ARMISD::TC_RETURN, dl, NodeTys, &Ops[0], Ops.size());
1624 // Returns a chain and a flag for retval copy to use.
1625 Chain = DAG.getNode(CallOpc, dl, NodeTys, &Ops[0], Ops.size());
1626 InFlag = Chain.getValue(1);
1628 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumBytes, true),
1629 DAG.getIntPtrConstant(0, true), InFlag);
1631 InFlag = Chain.getValue(1);
1633 // Handle result values, copying them out of physregs into vregs that we
1635 return LowerCallResult(Chain, InFlag, CallConv, isVarArg, Ins,
1639 /// HandleByVal - Every parameter *after* a byval parameter is passed
1640 /// on the stack. Remember the next parameter register to allocate,
1641 /// and then confiscate the rest of the parameter registers to insure
1644 llvm::ARMTargetLowering::HandleByVal(CCState *State, unsigned &size) const {
1645 unsigned reg = State->AllocateReg(GPRArgRegs, 4);
1646 assert((State->getCallOrPrologue() == Prologue ||
1647 State->getCallOrPrologue() == Call) &&
1648 "unhandled ParmContext");
1649 if ((!State->isFirstByValRegValid()) &&
1650 (ARM::R0 <= reg) && (reg <= ARM::R3)) {
1651 State->setFirstByValReg(reg);
1652 // At a call site, a byval parameter that is split between
1653 // registers and memory needs its size truncated here. In a
1654 // function prologue, such byval parameters are reassembled in
1655 // memory, and are not truncated.
1656 if (State->getCallOrPrologue() == Call) {
1657 unsigned excess = 4 * (ARM::R4 - reg);
1658 assert(size >= excess && "expected larger existing stack allocation");
1662 // Confiscate any remaining parameter registers to preclude their
1663 // assignment to subsequent parameters.
1664 while (State->AllocateReg(GPRArgRegs, 4))
1668 /// MatchingStackOffset - Return true if the given stack call argument is
1669 /// already available in the same position (relatively) of the caller's
1670 /// incoming argument stack.
1672 bool MatchingStackOffset(SDValue Arg, unsigned Offset, ISD::ArgFlagsTy Flags,
1673 MachineFrameInfo *MFI, const MachineRegisterInfo *MRI,
1674 const ARMInstrInfo *TII) {
1675 unsigned Bytes = Arg.getValueType().getSizeInBits() / 8;
1677 if (Arg.getOpcode() == ISD::CopyFromReg) {
1678 unsigned VR = cast<RegisterSDNode>(Arg.getOperand(1))->getReg();
1679 if (!TargetRegisterInfo::isVirtualRegister(VR))
1681 MachineInstr *Def = MRI->getVRegDef(VR);
1684 if (!Flags.isByVal()) {
1685 if (!TII->isLoadFromStackSlot(Def, FI))
1690 } else if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Arg)) {
1691 if (Flags.isByVal())
1692 // ByVal argument is passed in as a pointer but it's now being
1693 // dereferenced. e.g.
1694 // define @foo(%struct.X* %A) {
1695 // tail call @bar(%struct.X* byval %A)
1698 SDValue Ptr = Ld->getBasePtr();
1699 FrameIndexSDNode *FINode = dyn_cast<FrameIndexSDNode>(Ptr);
1702 FI = FINode->getIndex();
1706 assert(FI != INT_MAX);
1707 if (!MFI->isFixedObjectIndex(FI))
1709 return Offset == MFI->getObjectOffset(FI) && Bytes == MFI->getObjectSize(FI);
1712 /// IsEligibleForTailCallOptimization - Check whether the call is eligible
1713 /// for tail call optimization. Targets which want to do tail call
1714 /// optimization should implement this function.
1716 ARMTargetLowering::IsEligibleForTailCallOptimization(SDValue Callee,
1717 CallingConv::ID CalleeCC,
1719 bool isCalleeStructRet,
1720 bool isCallerStructRet,
1721 const SmallVectorImpl<ISD::OutputArg> &Outs,
1722 const SmallVectorImpl<SDValue> &OutVals,
1723 const SmallVectorImpl<ISD::InputArg> &Ins,
1724 SelectionDAG& DAG) const {
1725 const Function *CallerF = DAG.getMachineFunction().getFunction();
1726 CallingConv::ID CallerCC = CallerF->getCallingConv();
1727 bool CCMatch = CallerCC == CalleeCC;
1729 // Look for obvious safe cases to perform tail call optimization that do not
1730 // require ABI changes. This is what gcc calls sibcall.
1732 // Do not sibcall optimize vararg calls unless the call site is not passing
1734 if (isVarArg && !Outs.empty())
1737 // Also avoid sibcall optimization if either caller or callee uses struct
1738 // return semantics.
1739 if (isCalleeStructRet || isCallerStructRet)
1742 // FIXME: Completely disable sibcall for Thumb1 since Thumb1RegisterInfo::
1743 // emitEpilogue is not ready for them. Thumb tail calls also use t2B, as
1744 // the Thumb1 16-bit unconditional branch doesn't have sufficient relocation
1745 // support in the assembler and linker to be used. This would need to be
1746 // fixed to fully support tail calls in Thumb1.
1748 // Doing this is tricky, since the LDM/POP instruction on Thumb doesn't take
1749 // LR. This means if we need to reload LR, it takes an extra instructions,
1750 // which outweighs the value of the tail call; but here we don't know yet
1751 // whether LR is going to be used. Probably the right approach is to
1752 // generate the tail call here and turn it back into CALL/RET in
1753 // emitEpilogue if LR is used.
1755 // Thumb1 PIC calls to external symbols use BX, so they can be tail calls,
1756 // but we need to make sure there are enough registers; the only valid
1757 // registers are the 4 used for parameters. We don't currently do this
1759 if (Subtarget->isThumb1Only())
1762 // If the calling conventions do not match, then we'd better make sure the
1763 // results are returned in the same way as what the caller expects.
1765 SmallVector<CCValAssign, 16> RVLocs1;
1766 ARMCCState CCInfo1(CalleeCC, false, DAG.getMachineFunction(),
1767 getTargetMachine(), RVLocs1, *DAG.getContext(), Call);
1768 CCInfo1.AnalyzeCallResult(Ins, CCAssignFnForNode(CalleeCC, true, isVarArg));
1770 SmallVector<CCValAssign, 16> RVLocs2;
1771 ARMCCState CCInfo2(CallerCC, false, DAG.getMachineFunction(),
1772 getTargetMachine(), RVLocs2, *DAG.getContext(), Call);
1773 CCInfo2.AnalyzeCallResult(Ins, CCAssignFnForNode(CallerCC, true, isVarArg));
1775 if (RVLocs1.size() != RVLocs2.size())
1777 for (unsigned i = 0, e = RVLocs1.size(); i != e; ++i) {
1778 if (RVLocs1[i].isRegLoc() != RVLocs2[i].isRegLoc())
1780 if (RVLocs1[i].getLocInfo() != RVLocs2[i].getLocInfo())
1782 if (RVLocs1[i].isRegLoc()) {
1783 if (RVLocs1[i].getLocReg() != RVLocs2[i].getLocReg())
1786 if (RVLocs1[i].getLocMemOffset() != RVLocs2[i].getLocMemOffset())
1792 // If the callee takes no arguments then go on to check the results of the
1794 if (!Outs.empty()) {
1795 // Check if stack adjustment is needed. For now, do not do this if any
1796 // argument is passed on the stack.
1797 SmallVector<CCValAssign, 16> ArgLocs;
1798 ARMCCState CCInfo(CalleeCC, isVarArg, DAG.getMachineFunction(),
1799 getTargetMachine(), ArgLocs, *DAG.getContext(), Call);
1800 CCInfo.AnalyzeCallOperands(Outs,
1801 CCAssignFnForNode(CalleeCC, false, isVarArg));
1802 if (CCInfo.getNextStackOffset()) {
1803 MachineFunction &MF = DAG.getMachineFunction();
1805 // Check if the arguments are already laid out in the right way as
1806 // the caller's fixed stack objects.
1807 MachineFrameInfo *MFI = MF.getFrameInfo();
1808 const MachineRegisterInfo *MRI = &MF.getRegInfo();
1809 const ARMInstrInfo *TII =
1810 ((ARMTargetMachine&)getTargetMachine()).getInstrInfo();
1811 for (unsigned i = 0, realArgIdx = 0, e = ArgLocs.size();
1813 ++i, ++realArgIdx) {
1814 CCValAssign &VA = ArgLocs[i];
1815 EVT RegVT = VA.getLocVT();
1816 SDValue Arg = OutVals[realArgIdx];
1817 ISD::ArgFlagsTy Flags = Outs[realArgIdx].Flags;
1818 if (VA.getLocInfo() == CCValAssign::Indirect)
1820 if (VA.needsCustom()) {
1821 // f64 and vector types are split into multiple registers or
1822 // register/stack-slot combinations. The types will not match
1823 // the registers; give up on memory f64 refs until we figure
1824 // out what to do about this.
1827 if (!ArgLocs[++i].isRegLoc())
1829 if (RegVT == MVT::v2f64) {
1830 if (!ArgLocs[++i].isRegLoc())
1832 if (!ArgLocs[++i].isRegLoc())
1835 } else if (!VA.isRegLoc()) {
1836 if (!MatchingStackOffset(Arg, VA.getLocMemOffset(), Flags,
1848 ARMTargetLowering::LowerReturn(SDValue Chain,
1849 CallingConv::ID CallConv, bool isVarArg,
1850 const SmallVectorImpl<ISD::OutputArg> &Outs,
1851 const SmallVectorImpl<SDValue> &OutVals,
1852 DebugLoc dl, SelectionDAG &DAG) const {
1854 // CCValAssign - represent the assignment of the return value to a location.
1855 SmallVector<CCValAssign, 16> RVLocs;
1857 // CCState - Info about the registers and stack slots.
1858 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
1859 getTargetMachine(), RVLocs, *DAG.getContext(), Call);
1861 // Analyze outgoing return values.
1862 CCInfo.AnalyzeReturn(Outs, CCAssignFnForNode(CallConv, /* Return */ true,
1865 // If this is the first return lowered for this function, add
1866 // the regs to the liveout set for the function.
1867 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
1868 for (unsigned i = 0; i != RVLocs.size(); ++i)
1869 if (RVLocs[i].isRegLoc())
1870 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
1875 // Copy the result values into the output registers.
1876 for (unsigned i = 0, realRVLocIdx = 0;
1878 ++i, ++realRVLocIdx) {
1879 CCValAssign &VA = RVLocs[i];
1880 assert(VA.isRegLoc() && "Can only return in registers!");
1882 SDValue Arg = OutVals[realRVLocIdx];
1884 switch (VA.getLocInfo()) {
1885 default: llvm_unreachable("Unknown loc info!");
1886 case CCValAssign::Full: break;
1887 case CCValAssign::BCvt:
1888 Arg = DAG.getNode(ISD::BITCAST, dl, VA.getLocVT(), Arg);
1892 if (VA.needsCustom()) {
1893 if (VA.getLocVT() == MVT::v2f64) {
1894 // Extract the first half and return it in two registers.
1895 SDValue Half = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1896 DAG.getConstant(0, MVT::i32));
1897 SDValue HalfGPRs = DAG.getNode(ARMISD::VMOVRRD, dl,
1898 DAG.getVTList(MVT::i32, MVT::i32), Half);
1900 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), HalfGPRs, Flag);
1901 Flag = Chain.getValue(1);
1902 VA = RVLocs[++i]; // skip ahead to next loc
1903 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
1904 HalfGPRs.getValue(1), Flag);
1905 Flag = Chain.getValue(1);
1906 VA = RVLocs[++i]; // skip ahead to next loc
1908 // Extract the 2nd half and fall through to handle it as an f64 value.
1909 Arg = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64, Arg,
1910 DAG.getConstant(1, MVT::i32));
1912 // Legalize ret f64 -> ret 2 x i32. We always have fmrrd if f64 is
1914 SDValue fmrrd = DAG.getNode(ARMISD::VMOVRRD, dl,
1915 DAG.getVTList(MVT::i32, MVT::i32), &Arg, 1);
1916 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd, Flag);
1917 Flag = Chain.getValue(1);
1918 VA = RVLocs[++i]; // skip ahead to next loc
1919 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), fmrrd.getValue(1),
1922 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(), Arg, Flag);
1924 // Guarantee that all emitted copies are
1925 // stuck together, avoiding something bad.
1926 Flag = Chain.getValue(1);
1931 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
1933 result = DAG.getNode(ARMISD::RET_FLAG, dl, MVT::Other, Chain);
1938 bool ARMTargetLowering::isUsedByReturnOnly(SDNode *N) const {
1939 if (N->getNumValues() != 1)
1941 if (!N->hasNUsesOfValue(1, 0))
1944 unsigned NumCopies = 0;
1945 SDNode* Copies[2] = { 0, 0 };
1946 SDNode *Use = *N->use_begin();
1947 if (Use->getOpcode() == ISD::CopyToReg) {
1948 Copies[NumCopies++] = Use;
1949 } else if (Use->getOpcode() == ARMISD::VMOVRRD) {
1950 // f64 returned in a pair of GPRs.
1951 for (SDNode::use_iterator UI = Use->use_begin(), UE = Use->use_end();
1953 if (UI->getOpcode() != ISD::CopyToReg)
1955 Copies[UI.getUse().getResNo()] = *UI;
1958 } else if (Use->getOpcode() == ISD::BITCAST) {
1959 // f32 returned in a single GPR.
1960 if (!Use->hasNUsesOfValue(1, 0))
1962 Use = *Use->use_begin();
1963 if (Use->getOpcode() != ISD::CopyToReg || !Use->hasNUsesOfValue(1, 0))
1965 Copies[NumCopies++] = Use;
1970 if (NumCopies != 1 && NumCopies != 2)
1973 bool HasRet = false;
1974 for (unsigned i = 0; i < NumCopies; ++i) {
1975 SDNode *Copy = Copies[i];
1976 for (SDNode::use_iterator UI = Copy->use_begin(), UE = Copy->use_end();
1978 if (UI->getOpcode() == ISD::CopyToReg) {
1980 if (Use == Copies[0] || ((NumCopies == 2) && (Use == Copies[1])))
1984 if (UI->getOpcode() != ARMISD::RET_FLAG)
1993 bool ARMTargetLowering::mayBeEmittedAsTailCall(CallInst *CI) const {
1994 if (!EnableARMTailCalls)
1997 if (!CI->isTailCall())
2000 return !Subtarget->isThumb1Only();
2003 // ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
2004 // their target counterpart wrapped in the ARMISD::Wrapper node. Suppose N is
2005 // one of the above mentioned nodes. It has to be wrapped because otherwise
2006 // Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
2007 // be used to form addressing mode. These wrapped nodes will be selected
2009 static SDValue LowerConstantPool(SDValue Op, SelectionDAG &DAG) {
2010 EVT PtrVT = Op.getValueType();
2011 // FIXME there is no actual debug info here
2012 DebugLoc dl = Op.getDebugLoc();
2013 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
2015 if (CP->isMachineConstantPoolEntry())
2016 Res = DAG.getTargetConstantPool(CP->getMachineCPVal(), PtrVT,
2017 CP->getAlignment());
2019 Res = DAG.getTargetConstantPool(CP->getConstVal(), PtrVT,
2020 CP->getAlignment());
2021 return DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Res);
2024 unsigned ARMTargetLowering::getJumpTableEncoding() const {
2025 return MachineJumpTableInfo::EK_Inline;
2028 SDValue ARMTargetLowering::LowerBlockAddress(SDValue Op,
2029 SelectionDAG &DAG) const {
2030 MachineFunction &MF = DAG.getMachineFunction();
2031 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2032 unsigned ARMPCLabelIndex = 0;
2033 DebugLoc DL = Op.getDebugLoc();
2034 EVT PtrVT = getPointerTy();
2035 const BlockAddress *BA = cast<BlockAddressSDNode>(Op)->getBlockAddress();
2036 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2038 if (RelocM == Reloc::Static) {
2039 CPAddr = DAG.getTargetConstantPool(BA, PtrVT, 4);
2041 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2042 ARMPCLabelIndex = AFI->createPICLabelUId();
2043 ARMConstantPoolValue *CPV =
2044 ARMConstantPoolConstant::Create(BA, ARMPCLabelIndex,
2045 ARMCP::CPBlockAddress, PCAdj);
2046 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2048 CPAddr = DAG.getNode(ARMISD::Wrapper, DL, PtrVT, CPAddr);
2049 SDValue Result = DAG.getLoad(PtrVT, DL, DAG.getEntryNode(), CPAddr,
2050 MachinePointerInfo::getConstantPool(),
2051 false, false, false, 0);
2052 if (RelocM == Reloc::Static)
2054 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2055 return DAG.getNode(ARMISD::PIC_ADD, DL, PtrVT, Result, PICLabel);
2058 // Lower ISD::GlobalTLSAddress using the "general dynamic" model
2060 ARMTargetLowering::LowerToTLSGeneralDynamicModel(GlobalAddressSDNode *GA,
2061 SelectionDAG &DAG) const {
2062 DebugLoc dl = GA->getDebugLoc();
2063 EVT PtrVT = getPointerTy();
2064 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2065 MachineFunction &MF = DAG.getMachineFunction();
2066 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2067 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2068 ARMConstantPoolValue *CPV =
2069 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2070 ARMCP::CPValue, PCAdj, ARMCP::TLSGD, true);
2071 SDValue Argument = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2072 Argument = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Argument);
2073 Argument = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Argument,
2074 MachinePointerInfo::getConstantPool(),
2075 false, false, false, 0);
2076 SDValue Chain = Argument.getValue(1);
2078 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2079 Argument = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Argument, PICLabel);
2081 // call __tls_get_addr.
2084 Entry.Node = Argument;
2085 Entry.Ty = (Type *) Type::getInt32Ty(*DAG.getContext());
2086 Args.push_back(Entry);
2087 // FIXME: is there useful debug info available here?
2088 std::pair<SDValue, SDValue> CallResult =
2089 LowerCallTo(Chain, (Type *) Type::getInt32Ty(*DAG.getContext()),
2090 false, false, false, false,
2091 0, CallingConv::C, /*isTailCall=*/false,
2092 /*doesNotRet=*/false, /*isReturnValueUsed=*/true,
2093 DAG.getExternalSymbol("__tls_get_addr", PtrVT), Args, DAG, dl);
2094 return CallResult.first;
2097 // Lower ISD::GlobalTLSAddress using the "initial exec" or
2098 // "local exec" model.
2100 ARMTargetLowering::LowerToTLSExecModels(GlobalAddressSDNode *GA,
2101 SelectionDAG &DAG) const {
2102 const GlobalValue *GV = GA->getGlobal();
2103 DebugLoc dl = GA->getDebugLoc();
2105 SDValue Chain = DAG.getEntryNode();
2106 EVT PtrVT = getPointerTy();
2107 // Get the Thread Pointer
2108 SDValue ThreadPointer = DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2110 if (GV->isDeclaration()) {
2111 MachineFunction &MF = DAG.getMachineFunction();
2112 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2113 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2114 // Initial exec model.
2115 unsigned char PCAdj = Subtarget->isThumb() ? 4 : 8;
2116 ARMConstantPoolValue *CPV =
2117 ARMConstantPoolConstant::Create(GA->getGlobal(), ARMPCLabelIndex,
2118 ARMCP::CPValue, PCAdj, ARMCP::GOTTPOFF,
2120 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2121 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2122 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2123 MachinePointerInfo::getConstantPool(),
2124 false, false, false, 0);
2125 Chain = Offset.getValue(1);
2127 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2128 Offset = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Offset, PICLabel);
2130 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2131 MachinePointerInfo::getConstantPool(),
2132 false, false, false, 0);
2135 ARMConstantPoolValue *CPV =
2136 ARMConstantPoolConstant::Create(GV, ARMCP::TPOFF);
2137 Offset = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2138 Offset = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, Offset);
2139 Offset = DAG.getLoad(PtrVT, dl, Chain, Offset,
2140 MachinePointerInfo::getConstantPool(),
2141 false, false, false, 0);
2144 // The address of the thread local variable is the add of the thread
2145 // pointer with the offset of the variable.
2146 return DAG.getNode(ISD::ADD, dl, PtrVT, ThreadPointer, Offset);
2150 ARMTargetLowering::LowerGlobalTLSAddress(SDValue Op, SelectionDAG &DAG) const {
2151 // TODO: implement the "local dynamic" model
2152 assert(Subtarget->isTargetELF() &&
2153 "TLS not implemented for non-ELF targets");
2154 GlobalAddressSDNode *GA = cast<GlobalAddressSDNode>(Op);
2155 // If the relocation model is PIC, use the "General Dynamic" TLS Model,
2156 // otherwise use the "Local Exec" TLS Model
2157 if (getTargetMachine().getRelocationModel() == Reloc::PIC_)
2158 return LowerToTLSGeneralDynamicModel(GA, DAG);
2160 return LowerToTLSExecModels(GA, DAG);
2163 SDValue ARMTargetLowering::LowerGlobalAddressELF(SDValue Op,
2164 SelectionDAG &DAG) const {
2165 EVT PtrVT = getPointerTy();
2166 DebugLoc dl = Op.getDebugLoc();
2167 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2168 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2169 if (RelocM == Reloc::PIC_) {
2170 bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
2171 ARMConstantPoolValue *CPV =
2172 ARMConstantPoolConstant::Create(GV,
2173 UseGOTOFF ? ARMCP::GOTOFF : ARMCP::GOT);
2174 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2175 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2176 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(),
2178 MachinePointerInfo::getConstantPool(),
2179 false, false, false, 0);
2180 SDValue Chain = Result.getValue(1);
2181 SDValue GOT = DAG.getGLOBAL_OFFSET_TABLE(PtrVT);
2182 Result = DAG.getNode(ISD::ADD, dl, PtrVT, Result, GOT);
2184 Result = DAG.getLoad(PtrVT, dl, Chain, Result,
2185 MachinePointerInfo::getGOT(),
2186 false, false, false, 0);
2190 // If we have T2 ops, we can materialize the address directly via movt/movw
2191 // pair. This is always cheaper.
2192 if (Subtarget->useMovt()) {
2194 // FIXME: Once remat is capable of dealing with instructions with register
2195 // operands, expand this into two nodes.
2196 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2197 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2199 SDValue CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2200 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2201 return DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2202 MachinePointerInfo::getConstantPool(),
2203 false, false, false, 0);
2207 SDValue ARMTargetLowering::LowerGlobalAddressDarwin(SDValue Op,
2208 SelectionDAG &DAG) const {
2209 EVT PtrVT = getPointerTy();
2210 DebugLoc dl = Op.getDebugLoc();
2211 const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
2212 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2213 MachineFunction &MF = DAG.getMachineFunction();
2214 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2216 // FIXME: Enable this for static codegen when tool issues are fixed. Also
2217 // update ARMFastISel::ARMMaterializeGV.
2218 if (Subtarget->useMovt() && RelocM != Reloc::Static) {
2220 // FIXME: Once remat is capable of dealing with instructions with register
2221 // operands, expand this into two nodes.
2222 if (RelocM == Reloc::Static)
2223 return DAG.getNode(ARMISD::Wrapper, dl, PtrVT,
2224 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2226 unsigned Wrapper = (RelocM == Reloc::PIC_)
2227 ? ARMISD::WrapperPIC : ARMISD::WrapperDYN;
2228 SDValue Result = DAG.getNode(Wrapper, dl, PtrVT,
2229 DAG.getTargetGlobalAddress(GV, dl, PtrVT));
2230 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2231 Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), Result,
2232 MachinePointerInfo::getGOT(),
2233 false, false, false, 0);
2237 unsigned ARMPCLabelIndex = 0;
2239 if (RelocM == Reloc::Static) {
2240 CPAddr = DAG.getTargetConstantPool(GV, PtrVT, 4);
2242 ARMPCLabelIndex = AFI->createPICLabelUId();
2243 unsigned PCAdj = (RelocM != Reloc::PIC_) ? 0 : (Subtarget->isThumb()?4:8);
2244 ARMConstantPoolValue *CPV =
2245 ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex, ARMCP::CPValue,
2247 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2249 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2251 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2252 MachinePointerInfo::getConstantPool(),
2253 false, false, false, 0);
2254 SDValue Chain = Result.getValue(1);
2256 if (RelocM == Reloc::PIC_) {
2257 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2258 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2261 if (Subtarget->GVIsIndirectSymbol(GV, RelocM))
2262 Result = DAG.getLoad(PtrVT, dl, Chain, Result, MachinePointerInfo::getGOT(),
2263 false, false, false, 0);
2268 SDValue ARMTargetLowering::LowerGLOBAL_OFFSET_TABLE(SDValue Op,
2269 SelectionDAG &DAG) const {
2270 assert(Subtarget->isTargetELF() &&
2271 "GLOBAL OFFSET TABLE not implemented for non-ELF targets");
2272 MachineFunction &MF = DAG.getMachineFunction();
2273 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2274 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2275 EVT PtrVT = getPointerTy();
2276 DebugLoc dl = Op.getDebugLoc();
2277 unsigned PCAdj = Subtarget->isThumb() ? 4 : 8;
2278 ARMConstantPoolValue *CPV =
2279 ARMConstantPoolSymbol::Create(*DAG.getContext(), "_GLOBAL_OFFSET_TABLE_",
2280 ARMPCLabelIndex, PCAdj);
2281 SDValue CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2282 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2283 SDValue Result = DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2284 MachinePointerInfo::getConstantPool(),
2285 false, false, false, 0);
2286 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2287 return DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2291 ARMTargetLowering::LowerEH_SJLJ_SETJMP(SDValue Op, SelectionDAG &DAG) const {
2292 DebugLoc dl = Op.getDebugLoc();
2293 SDValue Val = DAG.getConstant(0, MVT::i32);
2294 return DAG.getNode(ARMISD::EH_SJLJ_SETJMP, dl,
2295 DAG.getVTList(MVT::i32, MVT::Other), Op.getOperand(0),
2296 Op.getOperand(1), Val);
2300 ARMTargetLowering::LowerEH_SJLJ_LONGJMP(SDValue Op, SelectionDAG &DAG) const {
2301 DebugLoc dl = Op.getDebugLoc();
2302 return DAG.getNode(ARMISD::EH_SJLJ_LONGJMP, dl, MVT::Other, Op.getOperand(0),
2303 Op.getOperand(1), DAG.getConstant(0, MVT::i32));
2307 ARMTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG,
2308 const ARMSubtarget *Subtarget) const {
2309 unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
2310 DebugLoc dl = Op.getDebugLoc();
2312 default: return SDValue(); // Don't custom lower most intrinsics.
2313 case Intrinsic::arm_thread_pointer: {
2314 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2315 return DAG.getNode(ARMISD::THREAD_POINTER, dl, PtrVT);
2317 case Intrinsic::eh_sjlj_lsda: {
2318 MachineFunction &MF = DAG.getMachineFunction();
2319 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2320 unsigned ARMPCLabelIndex = AFI->createPICLabelUId();
2321 EVT PtrVT = getPointerTy();
2322 DebugLoc dl = Op.getDebugLoc();
2323 Reloc::Model RelocM = getTargetMachine().getRelocationModel();
2325 unsigned PCAdj = (RelocM != Reloc::PIC_)
2326 ? 0 : (Subtarget->isThumb() ? 4 : 8);
2327 ARMConstantPoolValue *CPV =
2328 ARMConstantPoolConstant::Create(MF.getFunction(), ARMPCLabelIndex,
2329 ARMCP::CPLSDA, PCAdj);
2330 CPAddr = DAG.getTargetConstantPool(CPV, PtrVT, 4);
2331 CPAddr = DAG.getNode(ARMISD::Wrapper, dl, MVT::i32, CPAddr);
2333 DAG.getLoad(PtrVT, dl, DAG.getEntryNode(), CPAddr,
2334 MachinePointerInfo::getConstantPool(),
2335 false, false, false, 0);
2337 if (RelocM == Reloc::PIC_) {
2338 SDValue PICLabel = DAG.getConstant(ARMPCLabelIndex, MVT::i32);
2339 Result = DAG.getNode(ARMISD::PIC_ADD, dl, PtrVT, Result, PICLabel);
2343 case Intrinsic::arm_neon_vmulls:
2344 case Intrinsic::arm_neon_vmullu: {
2345 unsigned NewOpc = (IntNo == Intrinsic::arm_neon_vmulls)
2346 ? ARMISD::VMULLs : ARMISD::VMULLu;
2347 return DAG.getNode(NewOpc, Op.getDebugLoc(), Op.getValueType(),
2348 Op.getOperand(1), Op.getOperand(2));
2353 static SDValue LowerMEMBARRIER(SDValue Op, SelectionDAG &DAG,
2354 const ARMSubtarget *Subtarget) {
2355 DebugLoc dl = Op.getDebugLoc();
2356 if (!Subtarget->hasDataBarrier()) {
2357 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2358 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2360 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2361 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2362 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2363 DAG.getConstant(0, MVT::i32));
2366 SDValue Op5 = Op.getOperand(5);
2367 bool isDeviceBarrier = cast<ConstantSDNode>(Op5)->getZExtValue() != 0;
2368 unsigned isLL = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
2369 unsigned isLS = cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue();
2370 bool isOnlyStoreBarrier = (isLL == 0 && isLS == 0);
2372 ARM_MB::MemBOpt DMBOpt;
2373 if (isDeviceBarrier)
2374 DMBOpt = isOnlyStoreBarrier ? ARM_MB::ST : ARM_MB::SY;
2376 DMBOpt = isOnlyStoreBarrier ? ARM_MB::ISHST : ARM_MB::ISH;
2377 return DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
2378 DAG.getConstant(DMBOpt, MVT::i32));
2382 static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG,
2383 const ARMSubtarget *Subtarget) {
2384 // FIXME: handle "fence singlethread" more efficiently.
2385 DebugLoc dl = Op.getDebugLoc();
2386 if (!Subtarget->hasDataBarrier()) {
2387 // Some ARMv6 cpus can support data barriers with an mcr instruction.
2388 // Thumb1 and pre-v6 ARM mode use a libcall instead and should never get
2390 assert(Subtarget->hasV6Ops() && !Subtarget->isThumb() &&
2391 "Unexpected ISD::MEMBARRIER encountered. Should be libcall!");
2392 return DAG.getNode(ARMISD::MEMBARRIER_MCR, dl, MVT::Other, Op.getOperand(0),
2393 DAG.getConstant(0, MVT::i32));
2396 return DAG.getNode(ARMISD::MEMBARRIER, dl, MVT::Other, Op.getOperand(0),
2397 DAG.getConstant(ARM_MB::ISH, MVT::i32));
2400 static SDValue LowerPREFETCH(SDValue Op, SelectionDAG &DAG,
2401 const ARMSubtarget *Subtarget) {
2402 // ARM pre v5TE and Thumb1 does not have preload instructions.
2403 if (!(Subtarget->isThumb2() ||
2404 (!Subtarget->isThumb1Only() && Subtarget->hasV5TEOps())))
2405 // Just preserve the chain.
2406 return Op.getOperand(0);
2408 DebugLoc dl = Op.getDebugLoc();
2409 unsigned isRead = ~cast<ConstantSDNode>(Op.getOperand(2))->getZExtValue() & 1;
2411 (!Subtarget->hasV7Ops() || !Subtarget->hasMPExtension()))
2412 // ARMv7 with MP extension has PLDW.
2413 return Op.getOperand(0);
2415 unsigned isData = cast<ConstantSDNode>(Op.getOperand(4))->getZExtValue();
2416 if (Subtarget->isThumb()) {
2418 isRead = ~isRead & 1;
2419 isData = ~isData & 1;
2422 return DAG.getNode(ARMISD::PRELOAD, dl, MVT::Other, Op.getOperand(0),
2423 Op.getOperand(1), DAG.getConstant(isRead, MVT::i32),
2424 DAG.getConstant(isData, MVT::i32));
2427 static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG) {
2428 MachineFunction &MF = DAG.getMachineFunction();
2429 ARMFunctionInfo *FuncInfo = MF.getInfo<ARMFunctionInfo>();
2431 // vastart just stores the address of the VarArgsFrameIndex slot into the
2432 // memory location argument.
2433 DebugLoc dl = Op.getDebugLoc();
2434 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2435 SDValue FR = DAG.getFrameIndex(FuncInfo->getVarArgsFrameIndex(), PtrVT);
2436 const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
2437 return DAG.getStore(Op.getOperand(0), dl, FR, Op.getOperand(1),
2438 MachinePointerInfo(SV), false, false, 0);
2442 ARMTargetLowering::GetF64FormalArgument(CCValAssign &VA, CCValAssign &NextVA,
2443 SDValue &Root, SelectionDAG &DAG,
2444 DebugLoc dl) const {
2445 MachineFunction &MF = DAG.getMachineFunction();
2446 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2448 const TargetRegisterClass *RC;
2449 if (AFI->isThumb1OnlyFunction())
2450 RC = ARM::tGPRRegisterClass;
2452 RC = ARM::GPRRegisterClass;
2454 // Transform the arguments stored in physical registers into virtual ones.
2455 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2456 SDValue ArgValue = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2459 if (NextVA.isMemLoc()) {
2460 MachineFrameInfo *MFI = MF.getFrameInfo();
2461 int FI = MFI->CreateFixedObject(4, NextVA.getLocMemOffset(), true);
2463 // Create load node to retrieve arguments from the stack.
2464 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2465 ArgValue2 = DAG.getLoad(MVT::i32, dl, Root, FIN,
2466 MachinePointerInfo::getFixedStack(FI),
2467 false, false, false, 0);
2469 Reg = MF.addLiveIn(NextVA.getLocReg(), RC);
2470 ArgValue2 = DAG.getCopyFromReg(Root, dl, Reg, MVT::i32);
2473 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, ArgValue, ArgValue2);
2477 ARMTargetLowering::computeRegArea(CCState &CCInfo, MachineFunction &MF,
2478 unsigned &VARegSize, unsigned &VARegSaveSize)
2481 if (CCInfo.isFirstByValRegValid())
2482 NumGPRs = ARM::R4 - CCInfo.getFirstByValReg();
2484 unsigned int firstUnalloced;
2485 firstUnalloced = CCInfo.getFirstUnallocated(GPRArgRegs,
2486 sizeof(GPRArgRegs) /
2487 sizeof(GPRArgRegs[0]));
2488 NumGPRs = (firstUnalloced <= 3) ? (4 - firstUnalloced) : 0;
2491 unsigned Align = MF.getTarget().getFrameLowering()->getStackAlignment();
2492 VARegSize = NumGPRs * 4;
2493 VARegSaveSize = (VARegSize + Align - 1) & ~(Align - 1);
2496 // The remaining GPRs hold either the beginning of variable-argument
2497 // data, or the beginning of an aggregate passed by value (usuall
2498 // byval). Either way, we allocate stack slots adjacent to the data
2499 // provided by our caller, and store the unallocated registers there.
2500 // If this is a variadic function, the va_list pointer will begin with
2501 // these values; otherwise, this reassembles a (byval) structure that
2502 // was split between registers and memory.
2504 ARMTargetLowering::VarArgStyleRegisters(CCState &CCInfo, SelectionDAG &DAG,
2505 DebugLoc dl, SDValue &Chain,
2506 unsigned ArgOffset) const {
2507 MachineFunction &MF = DAG.getMachineFunction();
2508 MachineFrameInfo *MFI = MF.getFrameInfo();
2509 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2510 unsigned firstRegToSaveIndex;
2511 if (CCInfo.isFirstByValRegValid())
2512 firstRegToSaveIndex = CCInfo.getFirstByValReg() - ARM::R0;
2514 firstRegToSaveIndex = CCInfo.getFirstUnallocated
2515 (GPRArgRegs, sizeof(GPRArgRegs) / sizeof(GPRArgRegs[0]));
2518 unsigned VARegSize, VARegSaveSize;
2519 computeRegArea(CCInfo, MF, VARegSize, VARegSaveSize);
2520 if (VARegSaveSize) {
2521 // If this function is vararg, store any remaining integer argument regs
2522 // to their spots on the stack so that they may be loaded by deferencing
2523 // the result of va_next.
2524 AFI->setVarArgsRegSaveSize(VARegSaveSize);
2525 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(VARegSaveSize,
2526 ArgOffset + VARegSaveSize
2529 SDValue FIN = DAG.getFrameIndex(AFI->getVarArgsFrameIndex(),
2532 SmallVector<SDValue, 4> MemOps;
2533 for (; firstRegToSaveIndex < 4; ++firstRegToSaveIndex) {
2534 const TargetRegisterClass *RC;
2535 if (AFI->isThumb1OnlyFunction())
2536 RC = ARM::tGPRRegisterClass;
2538 RC = ARM::GPRRegisterClass;
2540 unsigned VReg = MF.addLiveIn(GPRArgRegs[firstRegToSaveIndex], RC);
2541 SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
2543 DAG.getStore(Val.getValue(1), dl, Val, FIN,
2544 MachinePointerInfo::getFixedStack(AFI->getVarArgsFrameIndex()),
2546 MemOps.push_back(Store);
2547 FIN = DAG.getNode(ISD::ADD, dl, getPointerTy(), FIN,
2548 DAG.getConstant(4, getPointerTy()));
2550 if (!MemOps.empty())
2551 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
2552 &MemOps[0], MemOps.size());
2554 // This will point to the next argument passed via stack.
2555 AFI->setVarArgsFrameIndex(MFI->CreateFixedObject(4, ArgOffset, true));
2559 ARMTargetLowering::LowerFormalArguments(SDValue Chain,
2560 CallingConv::ID CallConv, bool isVarArg,
2561 const SmallVectorImpl<ISD::InputArg>
2563 DebugLoc dl, SelectionDAG &DAG,
2564 SmallVectorImpl<SDValue> &InVals)
2566 MachineFunction &MF = DAG.getMachineFunction();
2567 MachineFrameInfo *MFI = MF.getFrameInfo();
2569 ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
2571 // Assign locations to all of the incoming arguments.
2572 SmallVector<CCValAssign, 16> ArgLocs;
2573 ARMCCState CCInfo(CallConv, isVarArg, DAG.getMachineFunction(),
2574 getTargetMachine(), ArgLocs, *DAG.getContext(), Prologue);
2575 CCInfo.AnalyzeFormalArguments(Ins,
2576 CCAssignFnForNode(CallConv, /* Return*/ false,
2579 SmallVector<SDValue, 16> ArgValues;
2580 int lastInsIndex = -1;
2583 for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
2584 CCValAssign &VA = ArgLocs[i];
2586 // Arguments stored in registers.
2587 if (VA.isRegLoc()) {
2588 EVT RegVT = VA.getLocVT();
2590 if (VA.needsCustom()) {
2591 // f64 and vector types are split up into multiple registers or
2592 // combinations of registers and stack slots.
2593 if (VA.getLocVT() == MVT::v2f64) {
2594 SDValue ArgValue1 = GetF64FormalArgument(VA, ArgLocs[++i],
2596 VA = ArgLocs[++i]; // skip ahead to next loc
2598 if (VA.isMemLoc()) {
2599 int FI = MFI->CreateFixedObject(8, VA.getLocMemOffset(), true);
2600 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2601 ArgValue2 = DAG.getLoad(MVT::f64, dl, Chain, FIN,
2602 MachinePointerInfo::getFixedStack(FI),
2603 false, false, false, 0);
2605 ArgValue2 = GetF64FormalArgument(VA, ArgLocs[++i],
2608 ArgValue = DAG.getNode(ISD::UNDEF, dl, MVT::v2f64);
2609 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2610 ArgValue, ArgValue1, DAG.getIntPtrConstant(0));
2611 ArgValue = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64,
2612 ArgValue, ArgValue2, DAG.getIntPtrConstant(1));
2614 ArgValue = GetF64FormalArgument(VA, ArgLocs[++i], Chain, DAG, dl);
2617 const TargetRegisterClass *RC;
2619 if (RegVT == MVT::f32)
2620 RC = ARM::SPRRegisterClass;
2621 else if (RegVT == MVT::f64)
2622 RC = ARM::DPRRegisterClass;
2623 else if (RegVT == MVT::v2f64)
2624 RC = ARM::QPRRegisterClass;
2625 else if (RegVT == MVT::i32)
2626 RC = (AFI->isThumb1OnlyFunction() ?
2627 ARM::tGPRRegisterClass : ARM::GPRRegisterClass);
2629 llvm_unreachable("RegVT not supported by FORMAL_ARGUMENTS Lowering");
2631 // Transform the arguments in physical registers into virtual ones.
2632 unsigned Reg = MF.addLiveIn(VA.getLocReg(), RC);
2633 ArgValue = DAG.getCopyFromReg(Chain, dl, Reg, RegVT);
2636 // If this is an 8 or 16-bit value, it is really passed promoted
2637 // to 32 bits. Insert an assert[sz]ext to capture this, then
2638 // truncate to the right size.
2639 switch (VA.getLocInfo()) {
2640 default: llvm_unreachable("Unknown loc info!");
2641 case CCValAssign::Full: break;
2642 case CCValAssign::BCvt:
2643 ArgValue = DAG.getNode(ISD::BITCAST, dl, VA.getValVT(), ArgValue);
2645 case CCValAssign::SExt:
2646 ArgValue = DAG.getNode(ISD::AssertSext, dl, RegVT, ArgValue,
2647 DAG.getValueType(VA.getValVT()));
2648 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2650 case CCValAssign::ZExt:
2651 ArgValue = DAG.getNode(ISD::AssertZext, dl, RegVT, ArgValue,
2652 DAG.getValueType(VA.getValVT()));
2653 ArgValue = DAG.getNode(ISD::TRUNCATE, dl, VA.getValVT(), ArgValue);
2657 InVals.push_back(ArgValue);
2659 } else { // VA.isRegLoc()
2662 assert(VA.isMemLoc());
2663 assert(VA.getValVT() != MVT::i64 && "i64 should already be lowered");
2665 int index = ArgLocs[i].getValNo();
2667 // Some Ins[] entries become multiple ArgLoc[] entries.
2668 // Process them only once.
2669 if (index != lastInsIndex)
2671 ISD::ArgFlagsTy Flags = Ins[index].Flags;
2672 // FIXME: For now, all byval parameter objects are marked mutable.
2673 // This can be changed with more analysis.
2674 // In case of tail call optimization mark all arguments mutable.
2675 // Since they could be overwritten by lowering of arguments in case of
2677 if (Flags.isByVal()) {
2678 unsigned VARegSize, VARegSaveSize;
2679 computeRegArea(CCInfo, MF, VARegSize, VARegSaveSize);
2680 VarArgStyleRegisters(CCInfo, DAG, dl, Chain, 0);
2681 unsigned Bytes = Flags.getByValSize() - VARegSize;
2682 if (Bytes == 0) Bytes = 1; // Don't create zero-sized stack objects.
2683 int FI = MFI->CreateFixedObject(Bytes,
2684 VA.getLocMemOffset(), false);
2685 InVals.push_back(DAG.getFrameIndex(FI, getPointerTy()));
2687 int FI = MFI->CreateFixedObject(VA.getLocVT().getSizeInBits()/8,
2688 VA.getLocMemOffset(), true);
2690 // Create load nodes to retrieve arguments from the stack.
2691 SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
2692 InVals.push_back(DAG.getLoad(VA.getValVT(), dl, Chain, FIN,
2693 MachinePointerInfo::getFixedStack(FI),
2694 false, false, false, 0));
2696 lastInsIndex = index;
2703 VarArgStyleRegisters(CCInfo, DAG, dl, Chain, CCInfo.getNextStackOffset());
2708 /// isFloatingPointZero - Return true if this is +0.0.
2709 static bool isFloatingPointZero(SDValue Op) {
2710 if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(Op))
2711 return CFP->getValueAPF().isPosZero();
2712 else if (ISD::isEXTLoad(Op.getNode()) || ISD::isNON_EXTLoad(Op.getNode())) {
2713 // Maybe this has already been legalized into the constant pool?
2714 if (Op.getOperand(1).getOpcode() == ARMISD::Wrapper) {
2715 SDValue WrapperOp = Op.getOperand(1).getOperand(0);
2716 if (ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(WrapperOp))
2717 if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CP->getConstVal()))
2718 return CFP->getValueAPF().isPosZero();
2724 /// Returns appropriate ARM CMP (cmp) and corresponding condition code for
2725 /// the given operands.
2727 ARMTargetLowering::getARMCmp(SDValue LHS, SDValue RHS, ISD::CondCode CC,
2728 SDValue &ARMcc, SelectionDAG &DAG,
2729 DebugLoc dl) const {
2730 if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(RHS.getNode())) {
2731 unsigned C = RHSC->getZExtValue();
2732 if (!isLegalICmpImmediate(C)) {
2733 // Constant does not fit, try adjusting it by one?
2738 if (C != 0x80000000 && isLegalICmpImmediate(C-1)) {
2739 CC = (CC == ISD::SETLT) ? ISD::SETLE : ISD::SETGT;
2740 RHS = DAG.getConstant(C-1, MVT::i32);
2745 if (C != 0 && isLegalICmpImmediate(C-1)) {
2746 CC = (CC == ISD::SETULT) ? ISD::SETULE : ISD::SETUGT;
2747 RHS = DAG.getConstant(C-1, MVT::i32);
2752 if (C != 0x7fffffff && isLegalICmpImmediate(C+1)) {
2753 CC = (CC == ISD::SETLE) ? ISD::SETLT : ISD::SETGE;
2754 RHS = DAG.getConstant(C+1, MVT::i32);
2759 if (C != 0xffffffff && isLegalICmpImmediate(C+1)) {
2760 CC = (CC == ISD::SETULE) ? ISD::SETULT : ISD::SETUGE;
2761 RHS = DAG.getConstant(C+1, MVT::i32);
2768 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
2769 ARMISD::NodeType CompareType;
2772 CompareType = ARMISD::CMP;
2777 CompareType = ARMISD::CMPZ;
2780 ARMcc = DAG.getConstant(CondCode, MVT::i32);
2781 return DAG.getNode(CompareType, dl, MVT::Glue, LHS, RHS);
2784 /// Returns a appropriate VFP CMP (fcmp{s|d}+fmstat) for the given operands.
2786 ARMTargetLowering::getVFPCmp(SDValue LHS, SDValue RHS, SelectionDAG &DAG,
2787 DebugLoc dl) const {
2789 if (!isFloatingPointZero(RHS))
2790 Cmp = DAG.getNode(ARMISD::CMPFP, dl, MVT::Glue, LHS, RHS);
2792 Cmp = DAG.getNode(ARMISD::CMPFPw0, dl, MVT::Glue, LHS);
2793 return DAG.getNode(ARMISD::FMSTAT, dl, MVT::Glue, Cmp);
2796 /// duplicateCmp - Glue values can have only one use, so this function
2797 /// duplicates a comparison node.
2799 ARMTargetLowering::duplicateCmp(SDValue Cmp, SelectionDAG &DAG) const {
2800 unsigned Opc = Cmp.getOpcode();
2801 DebugLoc DL = Cmp.getDebugLoc();
2802 if (Opc == ARMISD::CMP || Opc == ARMISD::CMPZ)
2803 return DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
2805 assert(Opc == ARMISD::FMSTAT && "unexpected comparison operation");
2806 Cmp = Cmp.getOperand(0);
2807 Opc = Cmp.getOpcode();
2808 if (Opc == ARMISD::CMPFP)
2809 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0),Cmp.getOperand(1));
2811 assert(Opc == ARMISD::CMPFPw0 && "unexpected operand of FMSTAT");
2812 Cmp = DAG.getNode(Opc, DL, MVT::Glue, Cmp.getOperand(0));
2814 return DAG.getNode(ARMISD::FMSTAT, DL, MVT::Glue, Cmp);
2817 SDValue ARMTargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
2818 SDValue Cond = Op.getOperand(0);
2819 SDValue SelectTrue = Op.getOperand(1);
2820 SDValue SelectFalse = Op.getOperand(2);
2821 DebugLoc dl = Op.getDebugLoc();
2825 // (select (cmov 1, 0, cond), t, f) -> (cmov t, f, cond)
2826 // (select (cmov 0, 1, cond), t, f) -> (cmov f, t, cond)
2828 if (Cond.getOpcode() == ARMISD::CMOV && Cond.hasOneUse()) {
2829 const ConstantSDNode *CMOVTrue =
2830 dyn_cast<ConstantSDNode>(Cond.getOperand(0));
2831 const ConstantSDNode *CMOVFalse =
2832 dyn_cast<ConstantSDNode>(Cond.getOperand(1));
2834 if (CMOVTrue && CMOVFalse) {
2835 unsigned CMOVTrueVal = CMOVTrue->getZExtValue();
2836 unsigned CMOVFalseVal = CMOVFalse->getZExtValue();
2840 if (CMOVTrueVal == 1 && CMOVFalseVal == 0) {
2842 False = SelectFalse;
2843 } else if (CMOVTrueVal == 0 && CMOVFalseVal == 1) {
2848 if (True.getNode() && False.getNode()) {
2849 EVT VT = Op.getValueType();
2850 SDValue ARMcc = Cond.getOperand(2);
2851 SDValue CCR = Cond.getOperand(3);
2852 SDValue Cmp = duplicateCmp(Cond.getOperand(4), DAG);
2853 assert(True.getValueType() == VT);
2854 return DAG.getNode(ARMISD::CMOV, dl, VT, True, False, ARMcc, CCR, Cmp);
2859 // ARM's BooleanContents value is UndefinedBooleanContent. Mask out the
2860 // undefined bits before doing a full-word comparison with zero.
2861 Cond = DAG.getNode(ISD::AND, dl, Cond.getValueType(), Cond,
2862 DAG.getConstant(1, Cond.getValueType()));
2864 return DAG.getSelectCC(dl, Cond,
2865 DAG.getConstant(0, Cond.getValueType()),
2866 SelectTrue, SelectFalse, ISD::SETNE);
2869 SDValue ARMTargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const {
2870 EVT VT = Op.getValueType();
2871 SDValue LHS = Op.getOperand(0);
2872 SDValue RHS = Op.getOperand(1);
2873 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
2874 SDValue TrueVal = Op.getOperand(2);
2875 SDValue FalseVal = Op.getOperand(3);
2876 DebugLoc dl = Op.getDebugLoc();
2878 if (LHS.getValueType() == MVT::i32) {
2880 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2881 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
2882 return DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc, CCR,Cmp);
2885 ARMCC::CondCodes CondCode, CondCode2;
2886 FPCCToARMCC(CC, CondCode, CondCode2);
2888 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
2889 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
2890 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
2891 SDValue Result = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal,
2893 if (CondCode2 != ARMCC::AL) {
2894 SDValue ARMcc2 = DAG.getConstant(CondCode2, MVT::i32);
2895 // FIXME: Needs another CMP because flag can have but one use.
2896 SDValue Cmp2 = getVFPCmp(LHS, RHS, DAG, dl);
2897 Result = DAG.getNode(ARMISD::CMOV, dl, VT,
2898 Result, TrueVal, ARMcc2, CCR, Cmp2);
2903 /// canChangeToInt - Given the fp compare operand, return true if it is suitable
2904 /// to morph to an integer compare sequence.
2905 static bool canChangeToInt(SDValue Op, bool &SeenZero,
2906 const ARMSubtarget *Subtarget) {
2907 SDNode *N = Op.getNode();
2908 if (!N->hasOneUse())
2909 // Otherwise it requires moving the value from fp to integer registers.
2911 if (!N->getNumValues())
2913 EVT VT = Op.getValueType();
2914 if (VT != MVT::f32 && !Subtarget->isFPBrccSlow())
2915 // f32 case is generally profitable. f64 case only makes sense when vcmpe +
2916 // vmrs are very slow, e.g. cortex-a8.
2919 if (isFloatingPointZero(Op)) {
2923 return ISD::isNormalLoad(N);
2926 static SDValue bitcastf32Toi32(SDValue Op, SelectionDAG &DAG) {
2927 if (isFloatingPointZero(Op))
2928 return DAG.getConstant(0, MVT::i32);
2930 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op))
2931 return DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2932 Ld->getChain(), Ld->getBasePtr(), Ld->getPointerInfo(),
2933 Ld->isVolatile(), Ld->isNonTemporal(),
2934 Ld->isInvariant(), Ld->getAlignment());
2936 llvm_unreachable("Unknown VFP cmp argument!");
2939 static void expandf64Toi32(SDValue Op, SelectionDAG &DAG,
2940 SDValue &RetVal1, SDValue &RetVal2) {
2941 if (isFloatingPointZero(Op)) {
2942 RetVal1 = DAG.getConstant(0, MVT::i32);
2943 RetVal2 = DAG.getConstant(0, MVT::i32);
2947 if (LoadSDNode *Ld = dyn_cast<LoadSDNode>(Op)) {
2948 SDValue Ptr = Ld->getBasePtr();
2949 RetVal1 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2950 Ld->getChain(), Ptr,
2951 Ld->getPointerInfo(),
2952 Ld->isVolatile(), Ld->isNonTemporal(),
2953 Ld->isInvariant(), Ld->getAlignment());
2955 EVT PtrType = Ptr.getValueType();
2956 unsigned NewAlign = MinAlign(Ld->getAlignment(), 4);
2957 SDValue NewPtr = DAG.getNode(ISD::ADD, Op.getDebugLoc(),
2958 PtrType, Ptr, DAG.getConstant(4, PtrType));
2959 RetVal2 = DAG.getLoad(MVT::i32, Op.getDebugLoc(),
2960 Ld->getChain(), NewPtr,
2961 Ld->getPointerInfo().getWithOffset(4),
2962 Ld->isVolatile(), Ld->isNonTemporal(),
2963 Ld->isInvariant(), NewAlign);
2967 llvm_unreachable("Unknown VFP cmp argument!");
2970 /// OptimizeVFPBrcond - With -enable-unsafe-fp-math, it's legal to optimize some
2971 /// f32 and even f64 comparisons to integer ones.
2973 ARMTargetLowering::OptimizeVFPBrcond(SDValue Op, SelectionDAG &DAG) const {
2974 SDValue Chain = Op.getOperand(0);
2975 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
2976 SDValue LHS = Op.getOperand(2);
2977 SDValue RHS = Op.getOperand(3);
2978 SDValue Dest = Op.getOperand(4);
2979 DebugLoc dl = Op.getDebugLoc();
2981 bool LHSSeenZero = false;
2982 bool LHSOk = canChangeToInt(LHS, LHSSeenZero, Subtarget);
2983 bool RHSSeenZero = false;
2984 bool RHSOk = canChangeToInt(RHS, RHSSeenZero, Subtarget);
2985 if (LHSOk && RHSOk && (LHSSeenZero || RHSSeenZero)) {
2986 // If unsafe fp math optimization is enabled and there are no other uses of
2987 // the CMP operands, and the condition code is EQ or NE, we can optimize it
2988 // to an integer comparison.
2989 if (CC == ISD::SETOEQ)
2991 else if (CC == ISD::SETUNE)
2994 SDValue Mask = DAG.getConstant(0x7fffffff, MVT::i32);
2996 if (LHS.getValueType() == MVT::f32) {
2997 LHS = DAG.getNode(ISD::AND, dl, MVT::i32,
2998 bitcastf32Toi32(LHS, DAG), Mask);
2999 RHS = DAG.getNode(ISD::AND, dl, MVT::i32,
3000 bitcastf32Toi32(RHS, DAG), Mask);
3001 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3002 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3003 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3004 Chain, Dest, ARMcc, CCR, Cmp);
3009 expandf64Toi32(LHS, DAG, LHS1, LHS2);
3010 expandf64Toi32(RHS, DAG, RHS1, RHS2);
3011 LHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, LHS2, Mask);
3012 RHS2 = DAG.getNode(ISD::AND, dl, MVT::i32, RHS2, Mask);
3013 ARMCC::CondCodes CondCode = IntCCToARMCC(CC);
3014 ARMcc = DAG.getConstant(CondCode, MVT::i32);
3015 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3016 SDValue Ops[] = { Chain, ARMcc, LHS1, LHS2, RHS1, RHS2, Dest };
3017 return DAG.getNode(ARMISD::BCC_i64, dl, VTList, Ops, 7);
3023 SDValue ARMTargetLowering::LowerBR_CC(SDValue Op, SelectionDAG &DAG) const {
3024 SDValue Chain = Op.getOperand(0);
3025 ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
3026 SDValue LHS = Op.getOperand(2);
3027 SDValue RHS = Op.getOperand(3);
3028 SDValue Dest = Op.getOperand(4);
3029 DebugLoc dl = Op.getDebugLoc();
3031 if (LHS.getValueType() == MVT::i32) {
3033 SDValue Cmp = getARMCmp(LHS, RHS, CC, ARMcc, DAG, dl);
3034 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3035 return DAG.getNode(ARMISD::BRCOND, dl, MVT::Other,
3036 Chain, Dest, ARMcc, CCR, Cmp);
3039 assert(LHS.getValueType() == MVT::f32 || LHS.getValueType() == MVT::f64);
3041 if (getTargetMachine().Options.UnsafeFPMath &&
3042 (CC == ISD::SETEQ || CC == ISD::SETOEQ ||
3043 CC == ISD::SETNE || CC == ISD::SETUNE)) {
3044 SDValue Result = OptimizeVFPBrcond(Op, DAG);
3045 if (Result.getNode())
3049 ARMCC::CondCodes CondCode, CondCode2;
3050 FPCCToARMCC(CC, CondCode, CondCode2);
3052 SDValue ARMcc = DAG.getConstant(CondCode, MVT::i32);
3053 SDValue Cmp = getVFPCmp(LHS, RHS, DAG, dl);
3054 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3055 SDVTList VTList = DAG.getVTList(MVT::Other, MVT::Glue);
3056 SDValue Ops[] = { Chain, Dest, ARMcc, CCR, Cmp };
3057 SDValue Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
3058 if (CondCode2 != ARMCC::AL) {
3059 ARMcc = DAG.getConstant(CondCode2, MVT::i32);
3060 SDValue Ops[] = { Res, Dest, ARMcc, CCR, Res.getValue(1) };
3061 Res = DAG.getNode(ARMISD::BRCOND, dl, VTList, Ops, 5);
3066 SDValue ARMTargetLowering::LowerBR_JT(SDValue Op, SelectionDAG &DAG) const {
3067 SDValue Chain = Op.getOperand(0);
3068 SDValue Table = Op.getOperand(1);
3069 SDValue Index = Op.getOperand(2);
3070 DebugLoc dl = Op.getDebugLoc();
3072 EVT PTy = getPointerTy();
3073 JumpTableSDNode *JT = cast<JumpTableSDNode>(Table);
3074 ARMFunctionInfo *AFI = DAG.getMachineFunction().getInfo<ARMFunctionInfo>();
3075 SDValue UId = DAG.getConstant(AFI->createJumpTableUId(), PTy);
3076 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PTy);
3077 Table = DAG.getNode(ARMISD::WrapperJT, dl, MVT::i32, JTI, UId);
3078 Index = DAG.getNode(ISD::MUL, dl, PTy, Index, DAG.getConstant(4, PTy));
3079 SDValue Addr = DAG.getNode(ISD::ADD, dl, PTy, Index, Table);
3080 if (Subtarget->isThumb2()) {
3081 // Thumb2 uses a two-level jump. That is, it jumps into the jump table
3082 // which does another jump to the destination. This also makes it easier
3083 // to translate it to TBB / TBH later.
3084 // FIXME: This might not work if the function is extremely large.
3085 return DAG.getNode(ARMISD::BR2_JT, dl, MVT::Other, Chain,
3086 Addr, Op.getOperand(2), JTI, UId);
3088 if (getTargetMachine().getRelocationModel() == Reloc::PIC_) {
3089 Addr = DAG.getLoad((EVT)MVT::i32, dl, Chain, Addr,
3090 MachinePointerInfo::getJumpTable(),
3091 false, false, false, 0);
3092 Chain = Addr.getValue(1);
3093 Addr = DAG.getNode(ISD::ADD, dl, PTy, Addr, Table);
3094 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3096 Addr = DAG.getLoad(PTy, dl, Chain, Addr,
3097 MachinePointerInfo::getJumpTable(),
3098 false, false, false, 0);
3099 Chain = Addr.getValue(1);
3100 return DAG.getNode(ARMISD::BR_JT, dl, MVT::Other, Chain, Addr, JTI, UId);
3104 static SDValue LowerVectorFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3105 EVT VT = Op.getValueType();
3106 DebugLoc dl = Op.getDebugLoc();
3108 if (Op.getValueType().getVectorElementType() == MVT::i32) {
3109 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::f32)
3111 return DAG.UnrollVectorOp(Op.getNode());
3114 assert(Op.getOperand(0).getValueType() == MVT::v4f32 &&
3115 "Invalid type for custom lowering!");
3116 if (VT != MVT::v4i16)
3117 return DAG.UnrollVectorOp(Op.getNode());
3119 Op = DAG.getNode(Op.getOpcode(), dl, MVT::v4i32, Op.getOperand(0));
3120 return DAG.getNode(ISD::TRUNCATE, dl, VT, Op);
3123 static SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG) {
3124 EVT VT = Op.getValueType();
3126 return LowerVectorFP_TO_INT(Op, DAG);
3128 DebugLoc dl = Op.getDebugLoc();
3131 switch (Op.getOpcode()) {
3132 default: llvm_unreachable("Invalid opcode!");
3133 case ISD::FP_TO_SINT:
3134 Opc = ARMISD::FTOSI;
3136 case ISD::FP_TO_UINT:
3137 Opc = ARMISD::FTOUI;
3140 Op = DAG.getNode(Opc, dl, MVT::f32, Op.getOperand(0));
3141 return DAG.getNode(ISD::BITCAST, dl, MVT::i32, Op);
3144 static SDValue LowerVectorINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3145 EVT VT = Op.getValueType();
3146 DebugLoc dl = Op.getDebugLoc();
3148 if (Op.getOperand(0).getValueType().getVectorElementType() == MVT::i32) {
3149 if (VT.getVectorElementType() == MVT::f32)
3151 return DAG.UnrollVectorOp(Op.getNode());
3154 assert(Op.getOperand(0).getValueType() == MVT::v4i16 &&
3155 "Invalid type for custom lowering!");
3156 if (VT != MVT::v4f32)
3157 return DAG.UnrollVectorOp(Op.getNode());
3161 switch (Op.getOpcode()) {
3162 default: llvm_unreachable("Invalid opcode!");
3163 case ISD::SINT_TO_FP:
3164 CastOpc = ISD::SIGN_EXTEND;
3165 Opc = ISD::SINT_TO_FP;
3167 case ISD::UINT_TO_FP:
3168 CastOpc = ISD::ZERO_EXTEND;
3169 Opc = ISD::UINT_TO_FP;
3173 Op = DAG.getNode(CastOpc, dl, MVT::v4i32, Op.getOperand(0));
3174 return DAG.getNode(Opc, dl, VT, Op);
3177 static SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
3178 EVT VT = Op.getValueType();
3180 return LowerVectorINT_TO_FP(Op, DAG);
3182 DebugLoc dl = Op.getDebugLoc();
3185 switch (Op.getOpcode()) {
3186 default: llvm_unreachable("Invalid opcode!");
3187 case ISD::SINT_TO_FP:
3188 Opc = ARMISD::SITOF;
3190 case ISD::UINT_TO_FP:
3191 Opc = ARMISD::UITOF;
3195 Op = DAG.getNode(ISD::BITCAST, dl, MVT::f32, Op.getOperand(0));
3196 return DAG.getNode(Opc, dl, VT, Op);
3199 SDValue ARMTargetLowering::LowerFCOPYSIGN(SDValue Op, SelectionDAG &DAG) const {
3200 // Implement fcopysign with a fabs and a conditional fneg.
3201 SDValue Tmp0 = Op.getOperand(0);
3202 SDValue Tmp1 = Op.getOperand(1);
3203 DebugLoc dl = Op.getDebugLoc();
3204 EVT VT = Op.getValueType();
3205 EVT SrcVT = Tmp1.getValueType();
3206 bool InGPR = Tmp0.getOpcode() == ISD::BITCAST ||
3207 Tmp0.getOpcode() == ARMISD::VMOVDRR;
3208 bool UseNEON = !InGPR && Subtarget->hasNEON();
3211 // Use VBSL to copy the sign bit.
3212 unsigned EncodedVal = ARM_AM::createNEONModImm(0x6, 0x80);
3213 SDValue Mask = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v2i32,
3214 DAG.getTargetConstant(EncodedVal, MVT::i32));
3215 EVT OpVT = (VT == MVT::f32) ? MVT::v2i32 : MVT::v1i64;
3217 Mask = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3218 DAG.getNode(ISD::BITCAST, dl, OpVT, Mask),
3219 DAG.getConstant(32, MVT::i32));
3220 else /*if (VT == MVT::f32)*/
3221 Tmp0 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp0);
3222 if (SrcVT == MVT::f32) {
3223 Tmp1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, MVT::v2f32, Tmp1);
3225 Tmp1 = DAG.getNode(ARMISD::VSHL, dl, OpVT,
3226 DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1),
3227 DAG.getConstant(32, MVT::i32));
3228 } else if (VT == MVT::f32)
3229 Tmp1 = DAG.getNode(ARMISD::VSHRu, dl, MVT::v1i64,
3230 DAG.getNode(ISD::BITCAST, dl, MVT::v1i64, Tmp1),
3231 DAG.getConstant(32, MVT::i32));
3232 Tmp0 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp0);
3233 Tmp1 = DAG.getNode(ISD::BITCAST, dl, OpVT, Tmp1);
3235 SDValue AllOnes = DAG.getTargetConstant(ARM_AM::createNEONModImm(0xe, 0xff),
3237 AllOnes = DAG.getNode(ARMISD::VMOVIMM, dl, MVT::v8i8, AllOnes);
3238 SDValue MaskNot = DAG.getNode(ISD::XOR, dl, OpVT, Mask,
3239 DAG.getNode(ISD::BITCAST, dl, OpVT, AllOnes));
3241 SDValue Res = DAG.getNode(ISD::OR, dl, OpVT,
3242 DAG.getNode(ISD::AND, dl, OpVT, Tmp1, Mask),
3243 DAG.getNode(ISD::AND, dl, OpVT, Tmp0, MaskNot));
3244 if (VT == MVT::f32) {
3245 Res = DAG.getNode(ISD::BITCAST, dl, MVT::v2f32, Res);
3246 Res = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f32, Res,
3247 DAG.getConstant(0, MVT::i32));
3249 Res = DAG.getNode(ISD::BITCAST, dl, MVT::f64, Res);
3255 // Bitcast operand 1 to i32.
3256 if (SrcVT == MVT::f64)
3257 Tmp1 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3258 &Tmp1, 1).getValue(1);
3259 Tmp1 = DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp1);
3261 // Or in the signbit with integer operations.
3262 SDValue Mask1 = DAG.getConstant(0x80000000, MVT::i32);
3263 SDValue Mask2 = DAG.getConstant(0x7fffffff, MVT::i32);
3264 Tmp1 = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp1, Mask1);
3265 if (VT == MVT::f32) {
3266 Tmp0 = DAG.getNode(ISD::AND, dl, MVT::i32,
3267 DAG.getNode(ISD::BITCAST, dl, MVT::i32, Tmp0), Mask2);
3268 return DAG.getNode(ISD::BITCAST, dl, MVT::f32,
3269 DAG.getNode(ISD::OR, dl, MVT::i32, Tmp0, Tmp1));
3272 // f64: Or the high part with signbit and then combine two parts.
3273 Tmp0 = DAG.getNode(ARMISD::VMOVRRD, dl, DAG.getVTList(MVT::i32, MVT::i32),
3275 SDValue Lo = Tmp0.getValue(0);
3276 SDValue Hi = DAG.getNode(ISD::AND, dl, MVT::i32, Tmp0.getValue(1), Mask2);
3277 Hi = DAG.getNode(ISD::OR, dl, MVT::i32, Hi, Tmp1);
3278 return DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi);
3281 SDValue ARMTargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) const{
3282 MachineFunction &MF = DAG.getMachineFunction();
3283 MachineFrameInfo *MFI = MF.getFrameInfo();
3284 MFI->setReturnAddressIsTaken(true);
3286 EVT VT = Op.getValueType();
3287 DebugLoc dl = Op.getDebugLoc();
3288 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3290 SDValue FrameAddr = LowerFRAMEADDR(Op, DAG);
3291 SDValue Offset = DAG.getConstant(4, MVT::i32);
3292 return DAG.getLoad(VT, dl, DAG.getEntryNode(),
3293 DAG.getNode(ISD::ADD, dl, VT, FrameAddr, Offset),
3294 MachinePointerInfo(), false, false, false, 0);
3297 // Return LR, which contains the return address. Mark it an implicit live-in.
3298 unsigned Reg = MF.addLiveIn(ARM::LR, getRegClassFor(MVT::i32));
3299 return DAG.getCopyFromReg(DAG.getEntryNode(), dl, Reg, VT);
3302 SDValue ARMTargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) const {
3303 MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
3304 MFI->setFrameAddressIsTaken(true);
3306 EVT VT = Op.getValueType();
3307 DebugLoc dl = Op.getDebugLoc(); // FIXME probably not meaningful
3308 unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
3309 unsigned FrameReg = (Subtarget->isThumb() || Subtarget->isTargetDarwin())
3310 ? ARM::R7 : ARM::R11;
3311 SDValue FrameAddr = DAG.getCopyFromReg(DAG.getEntryNode(), dl, FrameReg, VT);
3313 FrameAddr = DAG.getLoad(VT, dl, DAG.getEntryNode(), FrameAddr,
3314 MachinePointerInfo(),
3315 false, false, false, 0);
3319 /// ExpandBITCAST - If the target supports VFP, this function is called to
3320 /// expand a bit convert where either the source or destination type is i64 to
3321 /// use a VMOVDRR or VMOVRRD node. This should not be done when the non-i64
3322 /// operand type is illegal (e.g., v2f32 for a target that doesn't support
3323 /// vectors), since the legalizer won't know what to do with that.
3324 static SDValue ExpandBITCAST(SDNode *N, SelectionDAG &DAG) {
3325 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
3326 DebugLoc dl = N->getDebugLoc();
3327 SDValue Op = N->getOperand(0);
3329 // This function is only supposed to be called for i64 types, either as the
3330 // source or destination of the bit convert.
3331 EVT SrcVT = Op.getValueType();
3332 EVT DstVT = N->getValueType(0);
3333 assert((SrcVT == MVT::i64 || DstVT == MVT::i64) &&
3334 "ExpandBITCAST called for non-i64 type");
3336 // Turn i64->f64 into VMOVDRR.
3337 if (SrcVT == MVT::i64 && TLI.isTypeLegal(DstVT)) {
3338 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3339 DAG.getConstant(0, MVT::i32));
3340 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Op,
3341 DAG.getConstant(1, MVT::i32));
3342 return DAG.getNode(ISD::BITCAST, dl, DstVT,
3343 DAG.getNode(ARMISD::VMOVDRR, dl, MVT::f64, Lo, Hi));
3346 // Turn f64->i64 into VMOVRRD.
3347 if (DstVT == MVT::i64 && TLI.isTypeLegal(SrcVT)) {
3348 SDValue Cvt = DAG.getNode(ARMISD::VMOVRRD, dl,
3349 DAG.getVTList(MVT::i32, MVT::i32), &Op, 1);
3350 // Merge the pieces into a single i64 value.
3351 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Cvt, Cvt.getValue(1));
3357 /// getZeroVector - Returns a vector of specified type with all zero elements.
3358 /// Zero vectors are used to represent vector negation and in those cases
3359 /// will be implemented with the NEON VNEG instruction. However, VNEG does
3360 /// not support i64 elements, so sometimes the zero vectors will need to be
3361 /// explicitly constructed. Regardless, use a canonical VMOV to create the
3363 static SDValue getZeroVector(EVT VT, SelectionDAG &DAG, DebugLoc dl) {
3364 assert(VT.isVector() && "Expected a vector type");
3365 // The canonical modified immediate encoding of a zero vector is....0!
3366 SDValue EncodedVal = DAG.getTargetConstant(0, MVT::i32);
3367 EVT VmovVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
3368 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, EncodedVal);
3369 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
3372 /// LowerShiftRightParts - Lower SRA_PARTS, which returns two
3373 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3374 SDValue ARMTargetLowering::LowerShiftRightParts(SDValue Op,
3375 SelectionDAG &DAG) const {
3376 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3377 EVT VT = Op.getValueType();
3378 unsigned VTBits = VT.getSizeInBits();
3379 DebugLoc dl = Op.getDebugLoc();
3380 SDValue ShOpLo = Op.getOperand(0);
3381 SDValue ShOpHi = Op.getOperand(1);
3382 SDValue ShAmt = Op.getOperand(2);
3384 unsigned Opc = (Op.getOpcode() == ISD::SRA_PARTS) ? ISD::SRA : ISD::SRL;
3386 assert(Op.getOpcode() == ISD::SRA_PARTS || Op.getOpcode() == ISD::SRL_PARTS);
3388 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
3389 DAG.getConstant(VTBits, MVT::i32), ShAmt);
3390 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, ShAmt);
3391 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
3392 DAG.getConstant(VTBits, MVT::i32));
3393 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, RevShAmt);
3394 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3395 SDValue TrueVal = DAG.getNode(Opc, dl, VT, ShOpHi, ExtraShAmt);
3397 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3398 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
3400 SDValue Hi = DAG.getNode(Opc, dl, VT, ShOpHi, ShAmt);
3401 SDValue Lo = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, TrueVal, ARMcc,
3404 SDValue Ops[2] = { Lo, Hi };
3405 return DAG.getMergeValues(Ops, 2, dl);
3408 /// LowerShiftLeftParts - Lower SHL_PARTS, which returns two
3409 /// i32 values and take a 2 x i32 value to shift plus a shift amount.
3410 SDValue ARMTargetLowering::LowerShiftLeftParts(SDValue Op,
3411 SelectionDAG &DAG) const {
3412 assert(Op.getNumOperands() == 3 && "Not a double-shift!");
3413 EVT VT = Op.getValueType();
3414 unsigned VTBits = VT.getSizeInBits();
3415 DebugLoc dl = Op.getDebugLoc();
3416 SDValue ShOpLo = Op.getOperand(0);
3417 SDValue ShOpHi = Op.getOperand(1);
3418 SDValue ShAmt = Op.getOperand(2);
3421 assert(Op.getOpcode() == ISD::SHL_PARTS);
3422 SDValue RevShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32,
3423 DAG.getConstant(VTBits, MVT::i32), ShAmt);
3424 SDValue Tmp1 = DAG.getNode(ISD::SRL, dl, VT, ShOpLo, RevShAmt);
3425 SDValue ExtraShAmt = DAG.getNode(ISD::SUB, dl, MVT::i32, ShAmt,
3426 DAG.getConstant(VTBits, MVT::i32));
3427 SDValue Tmp2 = DAG.getNode(ISD::SHL, dl, VT, ShOpHi, ShAmt);
3428 SDValue Tmp3 = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ExtraShAmt);
3430 SDValue FalseVal = DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2);
3431 SDValue CCR = DAG.getRegister(ARM::CPSR, MVT::i32);
3432 SDValue Cmp = getARMCmp(ExtraShAmt, DAG.getConstant(0, MVT::i32), ISD::SETGE,
3434 SDValue Lo = DAG.getNode(ISD::SHL, dl, VT, ShOpLo, ShAmt);
3435 SDValue Hi = DAG.getNode(ARMISD::CMOV, dl, VT, FalseVal, Tmp3, ARMcc,
3438 SDValue Ops[2] = { Lo, Hi };
3439 return DAG.getMergeValues(Ops, 2, dl);
3442 SDValue ARMTargetLowering::LowerFLT_ROUNDS_(SDValue Op,
3443 SelectionDAG &DAG) const {
3444 // The rounding mode is in bits 23:22 of the FPSCR.
3445 // The ARM rounding mode value to FLT_ROUNDS mapping is 0->1, 1->2, 2->3, 3->0
3446 // The formula we use to implement this is (((FPSCR + 1 << 22) >> 22) & 3)
3447 // so that the shift + and get folded into a bitfield extract.
3448 DebugLoc dl = Op.getDebugLoc();
3449 SDValue FPSCR = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::i32,
3450 DAG.getConstant(Intrinsic::arm_get_fpscr,
3452 SDValue FltRounds = DAG.getNode(ISD::ADD, dl, MVT::i32, FPSCR,
3453 DAG.getConstant(1U << 22, MVT::i32));
3454 SDValue RMODE = DAG.getNode(ISD::SRL, dl, MVT::i32, FltRounds,
3455 DAG.getConstant(22, MVT::i32));
3456 return DAG.getNode(ISD::AND, dl, MVT::i32, RMODE,
3457 DAG.getConstant(3, MVT::i32));
3460 static SDValue LowerCTTZ(SDNode *N, SelectionDAG &DAG,
3461 const ARMSubtarget *ST) {
3462 EVT VT = N->getValueType(0);
3463 DebugLoc dl = N->getDebugLoc();
3465 if (!ST->hasV6T2Ops())
3468 SDValue rbit = DAG.getNode(ARMISD::RBIT, dl, VT, N->getOperand(0));
3469 return DAG.getNode(ISD::CTLZ, dl, VT, rbit);
3472 static SDValue LowerShift(SDNode *N, SelectionDAG &DAG,
3473 const ARMSubtarget *ST) {
3474 EVT VT = N->getValueType(0);
3475 DebugLoc dl = N->getDebugLoc();
3480 // Lower vector shifts on NEON to use VSHL.
3481 assert(ST->hasNEON() && "unexpected vector shift");
3483 // Left shifts translate directly to the vshiftu intrinsic.
3484 if (N->getOpcode() == ISD::SHL)
3485 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
3486 DAG.getConstant(Intrinsic::arm_neon_vshiftu, MVT::i32),
3487 N->getOperand(0), N->getOperand(1));
3489 assert((N->getOpcode() == ISD::SRA ||
3490 N->getOpcode() == ISD::SRL) && "unexpected vector shift opcode");
3492 // NEON uses the same intrinsics for both left and right shifts. For
3493 // right shifts, the shift amounts are negative, so negate the vector of
3495 EVT ShiftVT = N->getOperand(1).getValueType();
3496 SDValue NegatedCount = DAG.getNode(ISD::SUB, dl, ShiftVT,
3497 getZeroVector(ShiftVT, DAG, dl),
3499 Intrinsic::ID vshiftInt = (N->getOpcode() == ISD::SRA ?
3500 Intrinsic::arm_neon_vshifts :
3501 Intrinsic::arm_neon_vshiftu);
3502 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, VT,
3503 DAG.getConstant(vshiftInt, MVT::i32),
3504 N->getOperand(0), NegatedCount);
3507 static SDValue Expand64BitShift(SDNode *N, SelectionDAG &DAG,
3508 const ARMSubtarget *ST) {
3509 EVT VT = N->getValueType(0);
3510 DebugLoc dl = N->getDebugLoc();
3512 // We can get here for a node like i32 = ISD::SHL i32, i64
3516 assert((N->getOpcode() == ISD::SRL || N->getOpcode() == ISD::SRA) &&
3517 "Unknown shift to lower!");
3519 // We only lower SRA, SRL of 1 here, all others use generic lowering.
3520 if (!isa<ConstantSDNode>(N->getOperand(1)) ||
3521 cast<ConstantSDNode>(N->getOperand(1))->getZExtValue() != 1)
3524 // If we are in thumb mode, we don't have RRX.
3525 if (ST->isThumb1Only()) return SDValue();
3527 // Okay, we have a 64-bit SRA or SRL of 1. Lower this to an RRX expr.
3528 SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
3529 DAG.getConstant(0, MVT::i32));
3530 SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, N->getOperand(0),
3531 DAG.getConstant(1, MVT::i32));
3533 // First, build a SRA_FLAG/SRL_FLAG op, which shifts the top part by one and
3534 // captures the result into a carry flag.
3535 unsigned Opc = N->getOpcode() == ISD::SRL ? ARMISD::SRL_FLAG:ARMISD::SRA_FLAG;
3536 Hi = DAG.getNode(Opc, dl, DAG.getVTList(MVT::i32, MVT::Glue), &Hi, 1);
3538 // The low part is an ARMISD::RRX operand, which shifts the carry in.
3539 Lo = DAG.getNode(ARMISD::RRX, dl, MVT::i32, Lo, Hi.getValue(1));
3541 // Merge the pieces into a single i64 value.
3542 return DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, Lo, Hi);
3545 static SDValue LowerVSETCC(SDValue Op, SelectionDAG &DAG) {
3546 SDValue TmpOp0, TmpOp1;
3547 bool Invert = false;
3551 SDValue Op0 = Op.getOperand(0);
3552 SDValue Op1 = Op.getOperand(1);
3553 SDValue CC = Op.getOperand(2);
3554 EVT VT = Op.getValueType();
3555 ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
3556 DebugLoc dl = Op.getDebugLoc();
3558 if (Op.getOperand(1).getValueType().isFloatingPoint()) {
3559 switch (SetCCOpcode) {
3560 default: llvm_unreachable("Illegal FP comparison");
3562 case ISD::SETNE: Invert = true; // Fallthrough
3564 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
3566 case ISD::SETLT: Swap = true; // Fallthrough
3568 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3570 case ISD::SETLE: Swap = true; // Fallthrough
3572 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3573 case ISD::SETUGE: Swap = true; // Fallthrough
3574 case ISD::SETULE: Invert = true; Opc = ARMISD::VCGT; break;
3575 case ISD::SETUGT: Swap = true; // Fallthrough
3576 case ISD::SETULT: Invert = true; Opc = ARMISD::VCGE; break;
3577 case ISD::SETUEQ: Invert = true; // Fallthrough
3579 // Expand this to (OLT | OGT).
3583 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
3584 Op1 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp0, TmpOp1);
3586 case ISD::SETUO: Invert = true; // Fallthrough
3588 // Expand this to (OLT | OGE).
3592 Op0 = DAG.getNode(ARMISD::VCGT, dl, VT, TmpOp1, TmpOp0);
3593 Op1 = DAG.getNode(ARMISD::VCGE, dl, VT, TmpOp0, TmpOp1);
3597 // Integer comparisons.
3598 switch (SetCCOpcode) {
3599 default: llvm_unreachable("Illegal integer comparison");
3600 case ISD::SETNE: Invert = true;
3601 case ISD::SETEQ: Opc = ARMISD::VCEQ; break;
3602 case ISD::SETLT: Swap = true;
3603 case ISD::SETGT: Opc = ARMISD::VCGT; break;
3604 case ISD::SETLE: Swap = true;
3605 case ISD::SETGE: Opc = ARMISD::VCGE; break;
3606 case ISD::SETULT: Swap = true;
3607 case ISD::SETUGT: Opc = ARMISD::VCGTU; break;
3608 case ISD::SETULE: Swap = true;
3609 case ISD::SETUGE: Opc = ARMISD::VCGEU; break;
3612 // Detect VTST (Vector Test Bits) = icmp ne (and (op0, op1), zero).
3613 if (Opc == ARMISD::VCEQ) {
3616 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3618 else if (ISD::isBuildVectorAllZeros(Op0.getNode()))
3621 // Ignore bitconvert.
3622 if (AndOp.getNode() && AndOp.getOpcode() == ISD::BITCAST)
3623 AndOp = AndOp.getOperand(0);
3625 if (AndOp.getNode() && AndOp.getOpcode() == ISD::AND) {
3627 Op0 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(0));
3628 Op1 = DAG.getNode(ISD::BITCAST, dl, VT, AndOp.getOperand(1));
3635 std::swap(Op0, Op1);
3637 // If one of the operands is a constant vector zero, attempt to fold the
3638 // comparison to a specialized compare-against-zero form.
3640 if (ISD::isBuildVectorAllZeros(Op1.getNode()))
3642 else if (ISD::isBuildVectorAllZeros(Op0.getNode())) {
3643 if (Opc == ARMISD::VCGE)
3644 Opc = ARMISD::VCLEZ;
3645 else if (Opc == ARMISD::VCGT)
3646 Opc = ARMISD::VCLTZ;
3651 if (SingleOp.getNode()) {
3654 Result = DAG.getNode(ARMISD::VCEQZ, dl, VT, SingleOp); break;
3656 Result = DAG.getNode(ARMISD::VCGEZ, dl, VT, SingleOp); break;
3658 Result = DAG.getNode(ARMISD::VCLEZ, dl, VT, SingleOp); break;
3660 Result = DAG.getNode(ARMISD::VCGTZ, dl, VT, SingleOp); break;
3662 Result = DAG.getNode(ARMISD::VCLTZ, dl, VT, SingleOp); break;
3664 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3667 Result = DAG.getNode(Opc, dl, VT, Op0, Op1);
3671 Result = DAG.getNOT(dl, Result, VT);
3676 /// isNEONModifiedImm - Check if the specified splat value corresponds to a
3677 /// valid vector constant for a NEON instruction with a "modified immediate"
3678 /// operand (e.g., VMOV). If so, return the encoded value.
3679 static SDValue isNEONModifiedImm(uint64_t SplatBits, uint64_t SplatUndef,
3680 unsigned SplatBitSize, SelectionDAG &DAG,
3681 EVT &VT, bool is128Bits, NEONModImmType type) {
3682 unsigned OpCmode, Imm;
3684 // SplatBitSize is set to the smallest size that splats the vector, so a
3685 // zero vector will always have SplatBitSize == 8. However, NEON modified
3686 // immediate instructions others than VMOV do not support the 8-bit encoding
3687 // of a zero vector, and the default encoding of zero is supposed to be the
3692 switch (SplatBitSize) {
3694 if (type != VMOVModImm)
3696 // Any 1-byte value is OK. Op=0, Cmode=1110.
3697 assert((SplatBits & ~0xff) == 0 && "one byte splat value is too big");
3700 VT = is128Bits ? MVT::v16i8 : MVT::v8i8;
3704 // NEON's 16-bit VMOV supports splat values where only one byte is nonzero.
3705 VT = is128Bits ? MVT::v8i16 : MVT::v4i16;
3706 if ((SplatBits & ~0xff) == 0) {
3707 // Value = 0x00nn: Op=x, Cmode=100x.
3712 if ((SplatBits & ~0xff00) == 0) {
3713 // Value = 0xnn00: Op=x, Cmode=101x.
3715 Imm = SplatBits >> 8;
3721 // NEON's 32-bit VMOV supports splat values where:
3722 // * only one byte is nonzero, or
3723 // * the least significant byte is 0xff and the second byte is nonzero, or
3724 // * the least significant 2 bytes are 0xff and the third is nonzero.
3725 VT = is128Bits ? MVT::v4i32 : MVT::v2i32;
3726 if ((SplatBits & ~0xff) == 0) {
3727 // Value = 0x000000nn: Op=x, Cmode=000x.
3732 if ((SplatBits & ~0xff00) == 0) {
3733 // Value = 0x0000nn00: Op=x, Cmode=001x.
3735 Imm = SplatBits >> 8;
3738 if ((SplatBits & ~0xff0000) == 0) {
3739 // Value = 0x00nn0000: Op=x, Cmode=010x.
3741 Imm = SplatBits >> 16;
3744 if ((SplatBits & ~0xff000000) == 0) {
3745 // Value = 0xnn000000: Op=x, Cmode=011x.
3747 Imm = SplatBits >> 24;
3751 // cmode == 0b1100 and cmode == 0b1101 are not supported for VORR or VBIC
3752 if (type == OtherModImm) return SDValue();
3754 if ((SplatBits & ~0xffff) == 0 &&
3755 ((SplatBits | SplatUndef) & 0xff) == 0xff) {
3756 // Value = 0x0000nnff: Op=x, Cmode=1100.
3758 Imm = SplatBits >> 8;
3763 if ((SplatBits & ~0xffffff) == 0 &&
3764 ((SplatBits | SplatUndef) & 0xffff) == 0xffff) {
3765 // Value = 0x00nnffff: Op=x, Cmode=1101.
3767 Imm = SplatBits >> 16;
3768 SplatBits |= 0xffff;
3772 // Note: there are a few 32-bit splat values (specifically: 00ffff00,
3773 // ff000000, ff0000ff, and ffff00ff) that are valid for VMOV.I64 but not
3774 // VMOV.I32. A (very) minor optimization would be to replicate the value
3775 // and fall through here to test for a valid 64-bit splat. But, then the
3776 // caller would also need to check and handle the change in size.
3780 if (type != VMOVModImm)
3782 // NEON has a 64-bit VMOV splat where each byte is either 0 or 0xff.
3783 uint64_t BitMask = 0xff;
3785 unsigned ImmMask = 1;
3787 for (int ByteNum = 0; ByteNum < 8; ++ByteNum) {
3788 if (((SplatBits | SplatUndef) & BitMask) == BitMask) {
3791 } else if ((SplatBits & BitMask) != 0) {
3797 // Op=1, Cmode=1110.
3800 VT = is128Bits ? MVT::v2i64 : MVT::v1i64;
3805 llvm_unreachable("unexpected size for isNEONModifiedImm");
3808 unsigned EncodedVal = ARM_AM::createNEONModImm(OpCmode, Imm);
3809 return DAG.getTargetConstant(EncodedVal, MVT::i32);
3812 static bool isVEXTMask(ArrayRef<int> M, EVT VT,
3813 bool &ReverseVEXT, unsigned &Imm) {
3814 unsigned NumElts = VT.getVectorNumElements();
3815 ReverseVEXT = false;
3817 // Assume that the first shuffle index is not UNDEF. Fail if it is.
3823 // If this is a VEXT shuffle, the immediate value is the index of the first
3824 // element. The other shuffle indices must be the successive elements after
3826 unsigned ExpectedElt = Imm;
3827 for (unsigned i = 1; i < NumElts; ++i) {
3828 // Increment the expected index. If it wraps around, it may still be
3829 // a VEXT but the source vectors must be swapped.
3831 if (ExpectedElt == NumElts * 2) {
3836 if (M[i] < 0) continue; // ignore UNDEF indices
3837 if (ExpectedElt != static_cast<unsigned>(M[i]))
3841 // Adjust the index value if the source operands will be swapped.
3848 /// isVREVMask - Check if a vector shuffle corresponds to a VREV
3849 /// instruction with the specified blocksize. (The order of the elements
3850 /// within each block of the vector is reversed.)
3851 static bool isVREVMask(ArrayRef<int> M, EVT VT, unsigned BlockSize) {
3852 assert((BlockSize==16 || BlockSize==32 || BlockSize==64) &&
3853 "Only possible block sizes for VREV are: 16, 32, 64");
3855 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3859 unsigned NumElts = VT.getVectorNumElements();
3860 unsigned BlockElts = M[0] + 1;
3861 // If the first shuffle index is UNDEF, be optimistic.
3863 BlockElts = BlockSize / EltSz;
3865 if (BlockSize <= EltSz || BlockSize != BlockElts * EltSz)
3868 for (unsigned i = 0; i < NumElts; ++i) {
3869 if (M[i] < 0) continue; // ignore UNDEF indices
3870 if ((unsigned) M[i] != (i - i%BlockElts) + (BlockElts - 1 - i%BlockElts))
3877 static bool isVTBLMask(ArrayRef<int> M, EVT VT) {
3878 // We can handle <8 x i8> vector shuffles. If the index in the mask is out of
3879 // range, then 0 is placed into the resulting vector. So pretty much any mask
3880 // of 8 elements can work here.
3881 return VT == MVT::v8i8 && M.size() == 8;
3884 static bool isVTRNMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
3885 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3889 unsigned NumElts = VT.getVectorNumElements();
3890 WhichResult = (M[0] == 0 ? 0 : 1);
3891 for (unsigned i = 0; i < NumElts; i += 2) {
3892 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3893 (M[i+1] >= 0 && (unsigned) M[i+1] != i + NumElts + WhichResult))
3899 /// isVTRN_v_undef_Mask - Special case of isVTRNMask for canonical form of
3900 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3901 /// Mask is e.g., <0, 0, 2, 2> instead of <0, 4, 2, 6>.
3902 static bool isVTRN_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
3903 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3907 unsigned NumElts = VT.getVectorNumElements();
3908 WhichResult = (M[0] == 0 ? 0 : 1);
3909 for (unsigned i = 0; i < NumElts; i += 2) {
3910 if ((M[i] >= 0 && (unsigned) M[i] != i + WhichResult) ||
3911 (M[i+1] >= 0 && (unsigned) M[i+1] != i + WhichResult))
3917 static bool isVUZPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
3918 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3922 unsigned NumElts = VT.getVectorNumElements();
3923 WhichResult = (M[0] == 0 ? 0 : 1);
3924 for (unsigned i = 0; i != NumElts; ++i) {
3925 if (M[i] < 0) continue; // ignore UNDEF indices
3926 if ((unsigned) M[i] != 2 * i + WhichResult)
3930 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3931 if (VT.is64BitVector() && EltSz == 32)
3937 /// isVUZP_v_undef_Mask - Special case of isVUZPMask for canonical form of
3938 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3939 /// Mask is e.g., <0, 2, 0, 2> instead of <0, 2, 4, 6>,
3940 static bool isVUZP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
3941 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3945 unsigned Half = VT.getVectorNumElements() / 2;
3946 WhichResult = (M[0] == 0 ? 0 : 1);
3947 for (unsigned j = 0; j != 2; ++j) {
3948 unsigned Idx = WhichResult;
3949 for (unsigned i = 0; i != Half; ++i) {
3950 int MIdx = M[i + j * Half];
3951 if (MIdx >= 0 && (unsigned) MIdx != Idx)
3957 // VUZP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3958 if (VT.is64BitVector() && EltSz == 32)
3964 static bool isVZIPMask(ArrayRef<int> M, EVT VT, unsigned &WhichResult) {
3965 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3969 unsigned NumElts = VT.getVectorNumElements();
3970 WhichResult = (M[0] == 0 ? 0 : 1);
3971 unsigned Idx = WhichResult * NumElts / 2;
3972 for (unsigned i = 0; i != NumElts; i += 2) {
3973 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
3974 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx + NumElts))
3979 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
3980 if (VT.is64BitVector() && EltSz == 32)
3986 /// isVZIP_v_undef_Mask - Special case of isVZIPMask for canonical form of
3987 /// "vector_shuffle v, v", i.e., "vector_shuffle v, undef".
3988 /// Mask is e.g., <0, 0, 1, 1> instead of <0, 4, 1, 5>.
3989 static bool isVZIP_v_undef_Mask(ArrayRef<int> M, EVT VT, unsigned &WhichResult){
3990 unsigned EltSz = VT.getVectorElementType().getSizeInBits();
3994 unsigned NumElts = VT.getVectorNumElements();
3995 WhichResult = (M[0] == 0 ? 0 : 1);
3996 unsigned Idx = WhichResult * NumElts / 2;
3997 for (unsigned i = 0; i != NumElts; i += 2) {
3998 if ((M[i] >= 0 && (unsigned) M[i] != Idx) ||
3999 (M[i+1] >= 0 && (unsigned) M[i+1] != Idx))
4004 // VZIP.32 for 64-bit vectors is a pseudo-instruction alias for VTRN.32.
4005 if (VT.is64BitVector() && EltSz == 32)
4011 // If N is an integer constant that can be moved into a register in one
4012 // instruction, return an SDValue of such a constant (will become a MOV
4013 // instruction). Otherwise return null.
4014 static SDValue IsSingleInstrConstant(SDValue N, SelectionDAG &DAG,
4015 const ARMSubtarget *ST, DebugLoc dl) {
4017 if (!isa<ConstantSDNode>(N))
4019 Val = cast<ConstantSDNode>(N)->getZExtValue();
4021 if (ST->isThumb1Only()) {
4022 if (Val <= 255 || ~Val <= 255)
4023 return DAG.getConstant(Val, MVT::i32);
4025 if (ARM_AM::getSOImmVal(Val) != -1 || ARM_AM::getSOImmVal(~Val) != -1)
4026 return DAG.getConstant(Val, MVT::i32);
4031 // If this is a case we can't handle, return null and let the default
4032 // expansion code take care of it.
4033 SDValue ARMTargetLowering::LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
4034 const ARMSubtarget *ST) const {
4035 BuildVectorSDNode *BVN = cast<BuildVectorSDNode>(Op.getNode());
4036 DebugLoc dl = Op.getDebugLoc();
4037 EVT VT = Op.getValueType();
4039 APInt SplatBits, SplatUndef;
4040 unsigned SplatBitSize;
4042 if (BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
4043 if (SplatBitSize <= 64) {
4044 // Check if an immediate VMOV works.
4046 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
4047 SplatUndef.getZExtValue(), SplatBitSize,
4048 DAG, VmovVT, VT.is128BitVector(),
4050 if (Val.getNode()) {
4051 SDValue Vmov = DAG.getNode(ARMISD::VMOVIMM, dl, VmovVT, Val);
4052 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4055 // Try an immediate VMVN.
4056 uint64_t NegatedImm = (~SplatBits).getZExtValue();
4057 Val = isNEONModifiedImm(NegatedImm,
4058 SplatUndef.getZExtValue(), SplatBitSize,
4059 DAG, VmovVT, VT.is128BitVector(),
4061 if (Val.getNode()) {
4062 SDValue Vmov = DAG.getNode(ARMISD::VMVNIMM, dl, VmovVT, Val);
4063 return DAG.getNode(ISD::BITCAST, dl, VT, Vmov);
4066 // Use vmov.f32 to materialize other v2f32 and v4f32 splats.
4067 if ((VT == MVT::v2f32 || VT == MVT::v4f32) && SplatBitSize == 32) {
4068 int ImmVal = ARM_AM::getFP32Imm(SplatBits);
4070 SDValue Val = DAG.getTargetConstant(ImmVal, MVT::i32);
4071 return DAG.getNode(ARMISD::VMOVFPIMM, dl, VT, Val);
4077 // Scan through the operands to see if only one value is used.
4078 unsigned NumElts = VT.getVectorNumElements();
4079 bool isOnlyLowElement = true;
4080 bool usesOnlyOneValue = true;
4081 bool isConstant = true;
4083 for (unsigned i = 0; i < NumElts; ++i) {
4084 SDValue V = Op.getOperand(i);
4085 if (V.getOpcode() == ISD::UNDEF)
4088 isOnlyLowElement = false;
4089 if (!isa<ConstantFPSDNode>(V) && !isa<ConstantSDNode>(V))
4092 if (!Value.getNode())
4094 else if (V != Value)
4095 usesOnlyOneValue = false;
4098 if (!Value.getNode())
4099 return DAG.getUNDEF(VT);
4101 if (isOnlyLowElement)
4102 return DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, Value);
4104 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4106 // Use VDUP for non-constant splats. For f32 constant splats, reduce to
4107 // i32 and try again.
4108 if (usesOnlyOneValue && EltSize <= 32) {
4110 return DAG.getNode(ARMISD::VDUP, dl, VT, Value);
4111 if (VT.getVectorElementType().isFloatingPoint()) {
4112 SmallVector<SDValue, 8> Ops;
4113 for (unsigned i = 0; i < NumElts; ++i)
4114 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, MVT::i32,
4116 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), MVT::i32, NumElts);
4117 SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, VecVT, &Ops[0], NumElts);
4118 Val = LowerBUILD_VECTOR(Val, DAG, ST);
4120 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4122 SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl);
4124 return DAG.getNode(ARMISD::VDUP, dl, VT, Val);
4127 // If all elements are constants and the case above didn't get hit, fall back
4128 // to the default expansion, which will generate a load from the constant
4133 // Empirical tests suggest this is rarely worth it for vectors of length <= 2.
4135 SDValue shuffle = ReconstructShuffle(Op, DAG);
4136 if (shuffle != SDValue())
4140 // Vectors with 32- or 64-bit elements can be built by directly assigning
4141 // the subregisters. Lower it to an ARMISD::BUILD_VECTOR so the operands
4142 // will be legalized.
4143 if (EltSize >= 32) {
4144 // Do the expansion with floating-point types, since that is what the VFP
4145 // registers are defined to use, and since i64 is not legal.
4146 EVT EltVT = EVT::getFloatingPointVT(EltSize);
4147 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
4148 SmallVector<SDValue, 8> Ops;
4149 for (unsigned i = 0; i < NumElts; ++i)
4150 Ops.push_back(DAG.getNode(ISD::BITCAST, dl, EltVT, Op.getOperand(i)));
4151 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
4152 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4158 // Gather data to see if the operation can be modelled as a
4159 // shuffle in combination with VEXTs.
4160 SDValue ARMTargetLowering::ReconstructShuffle(SDValue Op,
4161 SelectionDAG &DAG) const {
4162 DebugLoc dl = Op.getDebugLoc();
4163 EVT VT = Op.getValueType();
4164 unsigned NumElts = VT.getVectorNumElements();
4166 SmallVector<SDValue, 2> SourceVecs;
4167 SmallVector<unsigned, 2> MinElts;
4168 SmallVector<unsigned, 2> MaxElts;
4170 for (unsigned i = 0; i < NumElts; ++i) {
4171 SDValue V = Op.getOperand(i);
4172 if (V.getOpcode() == ISD::UNDEF)
4174 else if (V.getOpcode() != ISD::EXTRACT_VECTOR_ELT) {
4175 // A shuffle can only come from building a vector from various
4176 // elements of other vectors.
4178 } else if (V.getOperand(0).getValueType().getVectorElementType() !=
4179 VT.getVectorElementType()) {
4180 // This code doesn't know how to handle shuffles where the vector
4181 // element types do not match (this happens because type legalization
4182 // promotes the return type of EXTRACT_VECTOR_ELT).
4183 // FIXME: It might be appropriate to extend this code to handle
4184 // mismatched types.
4188 // Record this extraction against the appropriate vector if possible...
4189 SDValue SourceVec = V.getOperand(0);
4190 unsigned EltNo = cast<ConstantSDNode>(V.getOperand(1))->getZExtValue();
4191 bool FoundSource = false;
4192 for (unsigned j = 0; j < SourceVecs.size(); ++j) {
4193 if (SourceVecs[j] == SourceVec) {
4194 if (MinElts[j] > EltNo)
4196 if (MaxElts[j] < EltNo)
4203 // Or record a new source if not...
4205 SourceVecs.push_back(SourceVec);
4206 MinElts.push_back(EltNo);
4207 MaxElts.push_back(EltNo);
4211 // Currently only do something sane when at most two source vectors
4213 if (SourceVecs.size() > 2)
4216 SDValue ShuffleSrcs[2] = {DAG.getUNDEF(VT), DAG.getUNDEF(VT) };
4217 int VEXTOffsets[2] = {0, 0};
4219 // This loop extracts the usage patterns of the source vectors
4220 // and prepares appropriate SDValues for a shuffle if possible.
4221 for (unsigned i = 0; i < SourceVecs.size(); ++i) {
4222 if (SourceVecs[i].getValueType() == VT) {
4223 // No VEXT necessary
4224 ShuffleSrcs[i] = SourceVecs[i];
4227 } else if (SourceVecs[i].getValueType().getVectorNumElements() < NumElts) {
4228 // It probably isn't worth padding out a smaller vector just to
4229 // break it down again in a shuffle.
4233 // Since only 64-bit and 128-bit vectors are legal on ARM and
4234 // we've eliminated the other cases...
4235 assert(SourceVecs[i].getValueType().getVectorNumElements() == 2*NumElts &&
4236 "unexpected vector sizes in ReconstructShuffle");
4238 if (MaxElts[i] - MinElts[i] >= NumElts) {
4239 // Span too large for a VEXT to cope
4243 if (MinElts[i] >= NumElts) {
4244 // The extraction can just take the second half
4245 VEXTOffsets[i] = NumElts;
4246 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4248 DAG.getIntPtrConstant(NumElts));
4249 } else if (MaxElts[i] < NumElts) {
4250 // The extraction can just take the first half
4252 ShuffleSrcs[i] = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4254 DAG.getIntPtrConstant(0));
4256 // An actual VEXT is needed
4257 VEXTOffsets[i] = MinElts[i];
4258 SDValue VEXTSrc1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4260 DAG.getIntPtrConstant(0));
4261 SDValue VEXTSrc2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, VT,
4263 DAG.getIntPtrConstant(NumElts));
4264 ShuffleSrcs[i] = DAG.getNode(ARMISD::VEXT, dl, VT, VEXTSrc1, VEXTSrc2,
4265 DAG.getConstant(VEXTOffsets[i], MVT::i32));
4269 SmallVector<int, 8> Mask;
4271 for (unsigned i = 0; i < NumElts; ++i) {
4272 SDValue Entry = Op.getOperand(i);
4273 if (Entry.getOpcode() == ISD::UNDEF) {
4278 SDValue ExtractVec = Entry.getOperand(0);
4279 int ExtractElt = cast<ConstantSDNode>(Op.getOperand(i)
4280 .getOperand(1))->getSExtValue();
4281 if (ExtractVec == SourceVecs[0]) {
4282 Mask.push_back(ExtractElt - VEXTOffsets[0]);
4284 Mask.push_back(ExtractElt + NumElts - VEXTOffsets[1]);
4288 // Final check before we try to produce nonsense...
4289 if (isShuffleMaskLegal(Mask, VT))
4290 return DAG.getVectorShuffle(VT, dl, ShuffleSrcs[0], ShuffleSrcs[1],
4296 /// isShuffleMaskLegal - Targets can use this to indicate that they only
4297 /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
4298 /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
4299 /// are assumed to be legal.
4301 ARMTargetLowering::isShuffleMaskLegal(const SmallVectorImpl<int> &M,
4303 if (VT.getVectorNumElements() == 4 &&
4304 (VT.is128BitVector() || VT.is64BitVector())) {
4305 unsigned PFIndexes[4];
4306 for (unsigned i = 0; i != 4; ++i) {
4310 PFIndexes[i] = M[i];
4313 // Compute the index in the perfect shuffle table.
4314 unsigned PFTableIndex =
4315 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4316 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4317 unsigned Cost = (PFEntry >> 30);
4324 unsigned Imm, WhichResult;
4326 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4327 return (EltSize >= 32 ||
4328 ShuffleVectorSDNode::isSplatMask(&M[0], VT) ||
4329 isVREVMask(M, VT, 64) ||
4330 isVREVMask(M, VT, 32) ||
4331 isVREVMask(M, VT, 16) ||
4332 isVEXTMask(M, VT, ReverseVEXT, Imm) ||
4333 isVTBLMask(M, VT) ||
4334 isVTRNMask(M, VT, WhichResult) ||
4335 isVUZPMask(M, VT, WhichResult) ||
4336 isVZIPMask(M, VT, WhichResult) ||
4337 isVTRN_v_undef_Mask(M, VT, WhichResult) ||
4338 isVUZP_v_undef_Mask(M, VT, WhichResult) ||
4339 isVZIP_v_undef_Mask(M, VT, WhichResult));
4342 /// GeneratePerfectShuffle - Given an entry in the perfect-shuffle table, emit
4343 /// the specified operations to build the shuffle.
4344 static SDValue GeneratePerfectShuffle(unsigned PFEntry, SDValue LHS,
4345 SDValue RHS, SelectionDAG &DAG,
4347 unsigned OpNum = (PFEntry >> 26) & 0x0F;
4348 unsigned LHSID = (PFEntry >> 13) & ((1 << 13)-1);
4349 unsigned RHSID = (PFEntry >> 0) & ((1 << 13)-1);
4352 OP_COPY = 0, // Copy, used for things like <u,u,u,3> to say it is <0,1,2,3>
4361 OP_VUZPL, // VUZP, left result
4362 OP_VUZPR, // VUZP, right result
4363 OP_VZIPL, // VZIP, left result
4364 OP_VZIPR, // VZIP, right result
4365 OP_VTRNL, // VTRN, left result
4366 OP_VTRNR // VTRN, right result
4369 if (OpNum == OP_COPY) {
4370 if (LHSID == (1*9+2)*9+3) return LHS;
4371 assert(LHSID == ((4*9+5)*9+6)*9+7 && "Illegal OP_COPY!");
4375 SDValue OpLHS, OpRHS;
4376 OpLHS = GeneratePerfectShuffle(PerfectShuffleTable[LHSID], LHS, RHS, DAG, dl);
4377 OpRHS = GeneratePerfectShuffle(PerfectShuffleTable[RHSID], LHS, RHS, DAG, dl);
4378 EVT VT = OpLHS.getValueType();
4381 default: llvm_unreachable("Unknown shuffle opcode!");
4383 // VREV divides the vector in half and swaps within the half.
4384 if (VT.getVectorElementType() == MVT::i32 ||
4385 VT.getVectorElementType() == MVT::f32)
4386 return DAG.getNode(ARMISD::VREV64, dl, VT, OpLHS);
4387 // vrev <4 x i16> -> VREV32
4388 if (VT.getVectorElementType() == MVT::i16)
4389 return DAG.getNode(ARMISD::VREV32, dl, VT, OpLHS);
4390 // vrev <4 x i8> -> VREV16
4391 assert(VT.getVectorElementType() == MVT::i8);
4392 return DAG.getNode(ARMISD::VREV16, dl, VT, OpLHS);
4397 return DAG.getNode(ARMISD::VDUPLANE, dl, VT,
4398 OpLHS, DAG.getConstant(OpNum-OP_VDUP0, MVT::i32));
4402 return DAG.getNode(ARMISD::VEXT, dl, VT,
4404 DAG.getConstant(OpNum-OP_VEXT1+1, MVT::i32));
4407 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4408 OpLHS, OpRHS).getValue(OpNum-OP_VUZPL);
4411 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4412 OpLHS, OpRHS).getValue(OpNum-OP_VZIPL);
4415 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4416 OpLHS, OpRHS).getValue(OpNum-OP_VTRNL);
4420 static SDValue LowerVECTOR_SHUFFLEv8i8(SDValue Op,
4421 ArrayRef<int> ShuffleMask,
4422 SelectionDAG &DAG) {
4423 // Check to see if we can use the VTBL instruction.
4424 SDValue V1 = Op.getOperand(0);
4425 SDValue V2 = Op.getOperand(1);
4426 DebugLoc DL = Op.getDebugLoc();
4428 SmallVector<SDValue, 8> VTBLMask;
4429 for (ArrayRef<int>::iterator
4430 I = ShuffleMask.begin(), E = ShuffleMask.end(); I != E; ++I)
4431 VTBLMask.push_back(DAG.getConstant(*I, MVT::i32));
4433 if (V2.getNode()->getOpcode() == ISD::UNDEF)
4434 return DAG.getNode(ARMISD::VTBL1, DL, MVT::v8i8, V1,
4435 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8,
4438 return DAG.getNode(ARMISD::VTBL2, DL, MVT::v8i8, V1, V2,
4439 DAG.getNode(ISD::BUILD_VECTOR, DL, MVT::v8i8,
4443 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
4444 SDValue V1 = Op.getOperand(0);
4445 SDValue V2 = Op.getOperand(1);
4446 DebugLoc dl = Op.getDebugLoc();
4447 EVT VT = Op.getValueType();
4448 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op.getNode());
4450 // Convert shuffles that are directly supported on NEON to target-specific
4451 // DAG nodes, instead of keeping them as shuffles and matching them again
4452 // during code selection. This is more efficient and avoids the possibility
4453 // of inconsistencies between legalization and selection.
4454 // FIXME: floating-point vectors should be canonicalized to integer vectors
4455 // of the same time so that they get CSEd properly.
4456 ArrayRef<int> ShuffleMask = SVN->getMask();
4458 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4459 if (EltSize <= 32) {
4460 if (ShuffleVectorSDNode::isSplatMask(&ShuffleMask[0], VT)) {
4461 int Lane = SVN->getSplatIndex();
4462 // If this is undef splat, generate it via "just" vdup, if possible.
4463 if (Lane == -1) Lane = 0;
4465 // Test if V1 is a SCALAR_TO_VECTOR.
4466 if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
4467 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
4469 // Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR
4470 // (and probably will turn into a SCALAR_TO_VECTOR once legalization
4472 if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR &&
4473 !isa<ConstantSDNode>(V1.getOperand(0))) {
4474 bool IsScalarToVector = true;
4475 for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i)
4476 if (V1.getOperand(i).getOpcode() != ISD::UNDEF) {
4477 IsScalarToVector = false;
4480 if (IsScalarToVector)
4481 return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
4483 return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
4484 DAG.getConstant(Lane, MVT::i32));
4489 if (isVEXTMask(ShuffleMask, VT, ReverseVEXT, Imm)) {
4492 return DAG.getNode(ARMISD::VEXT, dl, VT, V1, V2,
4493 DAG.getConstant(Imm, MVT::i32));
4496 if (isVREVMask(ShuffleMask, VT, 64))
4497 return DAG.getNode(ARMISD::VREV64, dl, VT, V1);
4498 if (isVREVMask(ShuffleMask, VT, 32))
4499 return DAG.getNode(ARMISD::VREV32, dl, VT, V1);
4500 if (isVREVMask(ShuffleMask, VT, 16))
4501 return DAG.getNode(ARMISD::VREV16, dl, VT, V1);
4503 // Check for Neon shuffles that modify both input vectors in place.
4504 // If both results are used, i.e., if there are two shuffles with the same
4505 // source operands and with masks corresponding to both results of one of
4506 // these operations, DAG memoization will ensure that a single node is
4507 // used for both shuffles.
4508 unsigned WhichResult;
4509 if (isVTRNMask(ShuffleMask, VT, WhichResult))
4510 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4511 V1, V2).getValue(WhichResult);
4512 if (isVUZPMask(ShuffleMask, VT, WhichResult))
4513 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4514 V1, V2).getValue(WhichResult);
4515 if (isVZIPMask(ShuffleMask, VT, WhichResult))
4516 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4517 V1, V2).getValue(WhichResult);
4519 if (isVTRN_v_undef_Mask(ShuffleMask, VT, WhichResult))
4520 return DAG.getNode(ARMISD::VTRN, dl, DAG.getVTList(VT, VT),
4521 V1, V1).getValue(WhichResult);
4522 if (isVUZP_v_undef_Mask(ShuffleMask, VT, WhichResult))
4523 return DAG.getNode(ARMISD::VUZP, dl, DAG.getVTList(VT, VT),
4524 V1, V1).getValue(WhichResult);
4525 if (isVZIP_v_undef_Mask(ShuffleMask, VT, WhichResult))
4526 return DAG.getNode(ARMISD::VZIP, dl, DAG.getVTList(VT, VT),
4527 V1, V1).getValue(WhichResult);
4530 // If the shuffle is not directly supported and it has 4 elements, use
4531 // the PerfectShuffle-generated table to synthesize it from other shuffles.
4532 unsigned NumElts = VT.getVectorNumElements();
4534 unsigned PFIndexes[4];
4535 for (unsigned i = 0; i != 4; ++i) {
4536 if (ShuffleMask[i] < 0)
4539 PFIndexes[i] = ShuffleMask[i];
4542 // Compute the index in the perfect shuffle table.
4543 unsigned PFTableIndex =
4544 PFIndexes[0]*9*9*9+PFIndexes[1]*9*9+PFIndexes[2]*9+PFIndexes[3];
4545 unsigned PFEntry = PerfectShuffleTable[PFTableIndex];
4546 unsigned Cost = (PFEntry >> 30);
4549 return GeneratePerfectShuffle(PFEntry, V1, V2, DAG, dl);
4552 // Implement shuffles with 32- or 64-bit elements as ARMISD::BUILD_VECTORs.
4553 if (EltSize >= 32) {
4554 // Do the expansion with floating-point types, since that is what the VFP
4555 // registers are defined to use, and since i64 is not legal.
4556 EVT EltVT = EVT::getFloatingPointVT(EltSize);
4557 EVT VecVT = EVT::getVectorVT(*DAG.getContext(), EltVT, NumElts);
4558 V1 = DAG.getNode(ISD::BITCAST, dl, VecVT, V1);
4559 V2 = DAG.getNode(ISD::BITCAST, dl, VecVT, V2);
4560 SmallVector<SDValue, 8> Ops;
4561 for (unsigned i = 0; i < NumElts; ++i) {
4562 if (ShuffleMask[i] < 0)
4563 Ops.push_back(DAG.getUNDEF(EltVT));
4565 Ops.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, EltVT,
4566 ShuffleMask[i] < (int)NumElts ? V1 : V2,
4567 DAG.getConstant(ShuffleMask[i] & (NumElts-1),
4570 SDValue Val = DAG.getNode(ARMISD::BUILD_VECTOR, dl, VecVT, &Ops[0],NumElts);
4571 return DAG.getNode(ISD::BITCAST, dl, VT, Val);
4574 if (VT == MVT::v8i8) {
4575 SDValue NewOp = LowerVECTOR_SHUFFLEv8i8(Op, ShuffleMask, DAG);
4576 if (NewOp.getNode())
4583 static SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4584 // INSERT_VECTOR_ELT is legal only for immediate indexes.
4585 SDValue Lane = Op.getOperand(2);
4586 if (!isa<ConstantSDNode>(Lane))
4592 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
4593 // EXTRACT_VECTOR_ELT is legal only for immediate indexes.
4594 SDValue Lane = Op.getOperand(1);
4595 if (!isa<ConstantSDNode>(Lane))
4598 SDValue Vec = Op.getOperand(0);
4599 if (Op.getValueType() == MVT::i32 &&
4600 Vec.getValueType().getVectorElementType().getSizeInBits() < 32) {
4601 DebugLoc dl = Op.getDebugLoc();
4602 return DAG.getNode(ARMISD::VGETLANEu, dl, MVT::i32, Vec, Lane);
4608 static SDValue LowerCONCAT_VECTORS(SDValue Op, SelectionDAG &DAG) {
4609 // The only time a CONCAT_VECTORS operation can have legal types is when
4610 // two 64-bit vectors are concatenated to a 128-bit vector.
4611 assert(Op.getValueType().is128BitVector() && Op.getNumOperands() == 2 &&
4612 "unexpected CONCAT_VECTORS");
4613 DebugLoc dl = Op.getDebugLoc();
4614 SDValue Val = DAG.getUNDEF(MVT::v2f64);
4615 SDValue Op0 = Op.getOperand(0);
4616 SDValue Op1 = Op.getOperand(1);
4617 if (Op0.getOpcode() != ISD::UNDEF)
4618 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
4619 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op0),
4620 DAG.getIntPtrConstant(0));
4621 if (Op1.getOpcode() != ISD::UNDEF)
4622 Val = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, MVT::v2f64, Val,
4623 DAG.getNode(ISD::BITCAST, dl, MVT::f64, Op1),
4624 DAG.getIntPtrConstant(1));
4625 return DAG.getNode(ISD::BITCAST, dl, Op.getValueType(), Val);
4628 /// isExtendedBUILD_VECTOR - Check if N is a constant BUILD_VECTOR where each
4629 /// element has been zero/sign-extended, depending on the isSigned parameter,
4630 /// from an integer type half its size.
4631 static bool isExtendedBUILD_VECTOR(SDNode *N, SelectionDAG &DAG,
4633 // A v2i64 BUILD_VECTOR will have been legalized to a BITCAST from v4i32.
4634 EVT VT = N->getValueType(0);
4635 if (VT == MVT::v2i64 && N->getOpcode() == ISD::BITCAST) {
4636 SDNode *BVN = N->getOperand(0).getNode();
4637 if (BVN->getValueType(0) != MVT::v4i32 ||
4638 BVN->getOpcode() != ISD::BUILD_VECTOR)
4640 unsigned LoElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
4641 unsigned HiElt = 1 - LoElt;
4642 ConstantSDNode *Lo0 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt));
4643 ConstantSDNode *Hi0 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt));
4644 ConstantSDNode *Lo1 = dyn_cast<ConstantSDNode>(BVN->getOperand(LoElt+2));
4645 ConstantSDNode *Hi1 = dyn_cast<ConstantSDNode>(BVN->getOperand(HiElt+2));
4646 if (!Lo0 || !Hi0 || !Lo1 || !Hi1)
4649 if (Hi0->getSExtValue() == Lo0->getSExtValue() >> 32 &&
4650 Hi1->getSExtValue() == Lo1->getSExtValue() >> 32)
4653 if (Hi0->isNullValue() && Hi1->isNullValue())
4659 if (N->getOpcode() != ISD::BUILD_VECTOR)
4662 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
4663 SDNode *Elt = N->getOperand(i).getNode();
4664 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) {
4665 unsigned EltSize = VT.getVectorElementType().getSizeInBits();
4666 unsigned HalfSize = EltSize / 2;
4668 if (!isIntN(HalfSize, C->getSExtValue()))
4671 if (!isUIntN(HalfSize, C->getZExtValue()))
4682 /// isSignExtended - Check if a node is a vector value that is sign-extended
4683 /// or a constant BUILD_VECTOR with sign-extended elements.
4684 static bool isSignExtended(SDNode *N, SelectionDAG &DAG) {
4685 if (N->getOpcode() == ISD::SIGN_EXTEND || ISD::isSEXTLoad(N))
4687 if (isExtendedBUILD_VECTOR(N, DAG, true))
4692 /// isZeroExtended - Check if a node is a vector value that is zero-extended
4693 /// or a constant BUILD_VECTOR with zero-extended elements.
4694 static bool isZeroExtended(SDNode *N, SelectionDAG &DAG) {
4695 if (N->getOpcode() == ISD::ZERO_EXTEND || ISD::isZEXTLoad(N))
4697 if (isExtendedBUILD_VECTOR(N, DAG, false))
4702 /// SkipExtension - For a node that is a SIGN_EXTEND, ZERO_EXTEND, extending
4703 /// load, or BUILD_VECTOR with extended elements, return the unextended value.
4704 static SDValue SkipExtension(SDNode *N, SelectionDAG &DAG) {
4705 if (N->getOpcode() == ISD::SIGN_EXTEND || N->getOpcode() == ISD::ZERO_EXTEND)
4706 return N->getOperand(0);
4707 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N))
4708 return DAG.getLoad(LD->getMemoryVT(), N->getDebugLoc(), LD->getChain(),
4709 LD->getBasePtr(), LD->getPointerInfo(), LD->isVolatile(),
4710 LD->isNonTemporal(), LD->isInvariant(),
4711 LD->getAlignment());
4712 // Otherwise, the value must be a BUILD_VECTOR. For v2i64, it will
4713 // have been legalized as a BITCAST from v4i32.
4714 if (N->getOpcode() == ISD::BITCAST) {
4715 SDNode *BVN = N->getOperand(0).getNode();
4716 assert(BVN->getOpcode() == ISD::BUILD_VECTOR &&
4717 BVN->getValueType(0) == MVT::v4i32 && "expected v4i32 BUILD_VECTOR");
4718 unsigned LowElt = DAG.getTargetLoweringInfo().isBigEndian() ? 1 : 0;
4719 return DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(), MVT::v2i32,
4720 BVN->getOperand(LowElt), BVN->getOperand(LowElt+2));
4722 // Construct a new BUILD_VECTOR with elements truncated to half the size.
4723 assert(N->getOpcode() == ISD::BUILD_VECTOR && "expected BUILD_VECTOR");
4724 EVT VT = N->getValueType(0);
4725 unsigned EltSize = VT.getVectorElementType().getSizeInBits() / 2;
4726 unsigned NumElts = VT.getVectorNumElements();
4727 MVT TruncVT = MVT::getIntegerVT(EltSize);
4728 SmallVector<SDValue, 8> Ops;
4729 for (unsigned i = 0; i != NumElts; ++i) {
4730 ConstantSDNode *C = cast<ConstantSDNode>(N->getOperand(i));
4731 const APInt &CInt = C->getAPIntValue();
4732 Ops.push_back(DAG.getConstant(CInt.trunc(EltSize), TruncVT));
4734 return DAG.getNode(ISD::BUILD_VECTOR, N->getDebugLoc(),
4735 MVT::getVectorVT(TruncVT, NumElts), Ops.data(), NumElts);
4738 static bool isAddSubSExt(SDNode *N, SelectionDAG &DAG) {
4739 unsigned Opcode = N->getOpcode();
4740 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
4741 SDNode *N0 = N->getOperand(0).getNode();
4742 SDNode *N1 = N->getOperand(1).getNode();
4743 return N0->hasOneUse() && N1->hasOneUse() &&
4744 isSignExtended(N0, DAG) && isSignExtended(N1, DAG);
4749 static bool isAddSubZExt(SDNode *N, SelectionDAG &DAG) {
4750 unsigned Opcode = N->getOpcode();
4751 if (Opcode == ISD::ADD || Opcode == ISD::SUB) {
4752 SDNode *N0 = N->getOperand(0).getNode();
4753 SDNode *N1 = N->getOperand(1).getNode();
4754 return N0->hasOneUse() && N1->hasOneUse() &&
4755 isZeroExtended(N0, DAG) && isZeroExtended(N1, DAG);
4760 static SDValue LowerMUL(SDValue Op, SelectionDAG &DAG) {
4761 // Multiplications are only custom-lowered for 128-bit vectors so that
4762 // VMULL can be detected. Otherwise v2i64 multiplications are not legal.
4763 EVT VT = Op.getValueType();
4764 assert(VT.is128BitVector() && "unexpected type for custom-lowering ISD::MUL");
4765 SDNode *N0 = Op.getOperand(0).getNode();
4766 SDNode *N1 = Op.getOperand(1).getNode();
4767 unsigned NewOpc = 0;
4769 bool isN0SExt = isSignExtended(N0, DAG);
4770 bool isN1SExt = isSignExtended(N1, DAG);
4771 if (isN0SExt && isN1SExt)
4772 NewOpc = ARMISD::VMULLs;
4774 bool isN0ZExt = isZeroExtended(N0, DAG);
4775 bool isN1ZExt = isZeroExtended(N1, DAG);
4776 if (isN0ZExt && isN1ZExt)
4777 NewOpc = ARMISD::VMULLu;
4778 else if (isN1SExt || isN1ZExt) {
4779 // Look for (s/zext A + s/zext B) * (s/zext C). We want to turn these
4780 // into (s/zext A * s/zext C) + (s/zext B * s/zext C)
4781 if (isN1SExt && isAddSubSExt(N0, DAG)) {
4782 NewOpc = ARMISD::VMULLs;
4784 } else if (isN1ZExt && isAddSubZExt(N0, DAG)) {
4785 NewOpc = ARMISD::VMULLu;
4787 } else if (isN0ZExt && isAddSubZExt(N1, DAG)) {
4789 NewOpc = ARMISD::VMULLu;
4795 if (VT == MVT::v2i64)
4796 // Fall through to expand this. It is not legal.
4799 // Other vector multiplications are legal.
4804 // Legalize to a VMULL instruction.
4805 DebugLoc DL = Op.getDebugLoc();
4807 SDValue Op1 = SkipExtension(N1, DAG);
4809 Op0 = SkipExtension(N0, DAG);
4810 assert(Op0.getValueType().is64BitVector() &&
4811 Op1.getValueType().is64BitVector() &&
4812 "unexpected types for extended operands to VMULL");
4813 return DAG.getNode(NewOpc, DL, VT, Op0, Op1);
4816 // Optimizing (zext A + zext B) * C, to (VMULL A, C) + (VMULL B, C) during
4817 // isel lowering to take advantage of no-stall back to back vmul + vmla.
4824 SDValue N00 = SkipExtension(N0->getOperand(0).getNode(), DAG);
4825 SDValue N01 = SkipExtension(N0->getOperand(1).getNode(), DAG);
4826 EVT Op1VT = Op1.getValueType();
4827 return DAG.getNode(N0->getOpcode(), DL, VT,
4828 DAG.getNode(NewOpc, DL, VT,
4829 DAG.getNode(ISD::BITCAST, DL, Op1VT, N00), Op1),
4830 DAG.getNode(NewOpc, DL, VT,
4831 DAG.getNode(ISD::BITCAST, DL, Op1VT, N01), Op1));
4835 LowerSDIV_v4i8(SDValue X, SDValue Y, DebugLoc dl, SelectionDAG &DAG) {
4837 // float4 xf = vcvt_f32_s32(vmovl_s16(a.lo));
4838 // float4 yf = vcvt_f32_s32(vmovl_s16(b.lo));
4839 X = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, X);
4840 Y = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, Y);
4841 X = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, X);
4842 Y = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, Y);
4843 // Get reciprocal estimate.
4844 // float4 recip = vrecpeq_f32(yf);
4845 Y = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4846 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), Y);
4847 // Because char has a smaller range than uchar, we can actually get away
4848 // without any newton steps. This requires that we use a weird bias
4849 // of 0xb000, however (again, this has been exhaustively tested).
4850 // float4 result = as_float4(as_int4(xf*recip) + 0xb000);
4851 X = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, X, Y);
4852 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, X);
4853 Y = DAG.getConstant(0xb000, MVT::i32);
4854 Y = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, Y, Y, Y, Y);
4855 X = DAG.getNode(ISD::ADD, dl, MVT::v4i32, X, Y);
4856 X = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, X);
4857 // Convert back to short.
4858 X = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, X);
4859 X = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, X);
4864 LowerSDIV_v4i16(SDValue N0, SDValue N1, DebugLoc dl, SelectionDAG &DAG) {
4866 // Convert to float.
4867 // float4 yf = vcvt_f32_s32(vmovl_s16(y));
4868 // float4 xf = vcvt_f32_s32(vmovl_s16(x));
4869 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N0);
4870 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v4i32, N1);
4871 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
4872 N1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
4874 // Use reciprocal estimate and one refinement step.
4875 // float4 recip = vrecpeq_f32(yf);
4876 // recip *= vrecpsq_f32(yf, recip);
4877 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4878 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), N1);
4879 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4880 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4882 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4883 // Because short has a smaller range than ushort, we can actually get away
4884 // with only a single newton step. This requires that we use a weird bias
4885 // of 89, however (again, this has been exhaustively tested).
4886 // float4 result = as_float4(as_int4(xf*recip) + 0x89);
4887 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
4888 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
4889 N1 = DAG.getConstant(0x89, MVT::i32);
4890 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
4891 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
4892 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
4893 // Convert back to integer and return.
4894 // return vmovn_s32(vcvt_s32_f32(result));
4895 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
4896 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
4900 static SDValue LowerSDIV(SDValue Op, SelectionDAG &DAG) {
4901 EVT VT = Op.getValueType();
4902 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
4903 "unexpected type for custom-lowering ISD::SDIV");
4905 DebugLoc dl = Op.getDebugLoc();
4906 SDValue N0 = Op.getOperand(0);
4907 SDValue N1 = Op.getOperand(1);
4910 if (VT == MVT::v8i8) {
4911 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N0);
4912 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::v8i16, N1);
4914 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4915 DAG.getIntPtrConstant(4));
4916 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4917 DAG.getIntPtrConstant(4));
4918 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4919 DAG.getIntPtrConstant(0));
4920 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4921 DAG.getIntPtrConstant(0));
4923 N0 = LowerSDIV_v4i8(N0, N1, dl, DAG); // v4i16
4924 N2 = LowerSDIV_v4i8(N2, N3, dl, DAG); // v4i16
4926 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
4927 N0 = LowerCONCAT_VECTORS(N0, DAG);
4929 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v8i8, N0);
4932 return LowerSDIV_v4i16(N0, N1, dl, DAG);
4935 static SDValue LowerUDIV(SDValue Op, SelectionDAG &DAG) {
4936 EVT VT = Op.getValueType();
4937 assert((VT == MVT::v4i16 || VT == MVT::v8i8) &&
4938 "unexpected type for custom-lowering ISD::UDIV");
4940 DebugLoc dl = Op.getDebugLoc();
4941 SDValue N0 = Op.getOperand(0);
4942 SDValue N1 = Op.getOperand(1);
4945 if (VT == MVT::v8i8) {
4946 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N0);
4947 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v8i16, N1);
4949 N2 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4950 DAG.getIntPtrConstant(4));
4951 N3 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4952 DAG.getIntPtrConstant(4));
4953 N0 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N0,
4954 DAG.getIntPtrConstant(0));
4955 N1 = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, MVT::v4i16, N1,
4956 DAG.getIntPtrConstant(0));
4958 N0 = LowerSDIV_v4i16(N0, N1, dl, DAG); // v4i16
4959 N2 = LowerSDIV_v4i16(N2, N3, dl, DAG); // v4i16
4961 N0 = DAG.getNode(ISD::CONCAT_VECTORS, dl, MVT::v8i16, N0, N2);
4962 N0 = LowerCONCAT_VECTORS(N0, DAG);
4964 N0 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v8i8,
4965 DAG.getConstant(Intrinsic::arm_neon_vqmovnsu, MVT::i32),
4970 // v4i16 sdiv ... Convert to float.
4971 // float4 yf = vcvt_f32_s32(vmovl_u16(y));
4972 // float4 xf = vcvt_f32_s32(vmovl_u16(x));
4973 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N0);
4974 N1 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::v4i32, N1);
4975 N0 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N0);
4976 SDValue BN1 = DAG.getNode(ISD::SINT_TO_FP, dl, MVT::v4f32, N1);
4978 // Use reciprocal estimate and two refinement steps.
4979 // float4 recip = vrecpeq_f32(yf);
4980 // recip *= vrecpsq_f32(yf, recip);
4981 // recip *= vrecpsq_f32(yf, recip);
4982 N2 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4983 DAG.getConstant(Intrinsic::arm_neon_vrecpe, MVT::i32), BN1);
4984 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4985 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4987 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4988 N1 = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, dl, MVT::v4f32,
4989 DAG.getConstant(Intrinsic::arm_neon_vrecps, MVT::i32),
4991 N2 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N1, N2);
4992 // Simply multiplying by the reciprocal estimate can leave us a few ulps
4993 // too low, so we add 2 ulps (exhaustive testing shows that this is enough,
4994 // and that it will never cause us to return an answer too large).
4995 // float4 result = as_float4(as_int4(xf*recip) + 2);
4996 N0 = DAG.getNode(ISD::FMUL, dl, MVT::v4f32, N0, N2);
4997 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4i32, N0);
4998 N1 = DAG.getConstant(2, MVT::i32);
4999 N1 = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, N1, N1, N1, N1);
5000 N0 = DAG.getNode(ISD::ADD, dl, MVT::v4i32, N0, N1);
5001 N0 = DAG.getNode(ISD::BITCAST, dl, MVT::v4f32, N0);
5002 // Convert back to integer and return.
5003 // return vmovn_u32(vcvt_s32_f32(result));
5004 N0 = DAG.getNode(ISD::FP_TO_SINT, dl, MVT::v4i32, N0);
5005 N0 = DAG.getNode(ISD::TRUNCATE, dl, MVT::v4i16, N0);
5009 static SDValue LowerADDC_ADDE_SUBC_SUBE(SDValue Op, SelectionDAG &DAG) {
5010 EVT VT = Op.getNode()->getValueType(0);
5011 SDVTList VTs = DAG.getVTList(VT, MVT::i32);
5014 bool ExtraOp = false;
5015 switch (Op.getOpcode()) {
5016 default: llvm_unreachable("Invalid code");
5017 case ISD::ADDC: Opc = ARMISD::ADDC; break;
5018 case ISD::ADDE: Opc = ARMISD::ADDE; ExtraOp = true; break;
5019 case ISD::SUBC: Opc = ARMISD::SUBC; break;
5020 case ISD::SUBE: Opc = ARMISD::SUBE; ExtraOp = true; break;
5024 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
5026 return DAG.getNode(Opc, Op->getDebugLoc(), VTs, Op.getOperand(0),
5027 Op.getOperand(1), Op.getOperand(2));
5030 static SDValue LowerAtomicLoadStore(SDValue Op, SelectionDAG &DAG) {
5031 // Monotonic load/store is legal for all targets
5032 if (cast<AtomicSDNode>(Op)->getOrdering() <= Monotonic)
5035 // Aquire/Release load/store is not legal for targets without a
5036 // dmb or equivalent available.
5042 ReplaceATOMIC_OP_64(SDNode *Node, SmallVectorImpl<SDValue>& Results,
5043 SelectionDAG &DAG, unsigned NewOp) {
5044 DebugLoc dl = Node->getDebugLoc();
5045 assert (Node->getValueType(0) == MVT::i64 &&
5046 "Only know how to expand i64 atomics");
5048 SmallVector<SDValue, 6> Ops;
5049 Ops.push_back(Node->getOperand(0)); // Chain
5050 Ops.push_back(Node->getOperand(1)); // Ptr
5052 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5053 Node->getOperand(2), DAG.getIntPtrConstant(0)));
5054 // High part of Val1
5055 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5056 Node->getOperand(2), DAG.getIntPtrConstant(1)));
5057 if (NewOp == ARMISD::ATOMCMPXCHG64_DAG) {
5058 // High part of Val1
5059 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5060 Node->getOperand(3), DAG.getIntPtrConstant(0)));
5061 // High part of Val2
5062 Ops.push_back(DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32,
5063 Node->getOperand(3), DAG.getIntPtrConstant(1)));
5065 SDVTList Tys = DAG.getVTList(MVT::i32, MVT::i32, MVT::Other);
5067 DAG.getMemIntrinsicNode(NewOp, dl, Tys, Ops.data(), Ops.size(), MVT::i64,
5068 cast<MemSDNode>(Node)->getMemOperand());
5069 SDValue OpsF[] = { Result.getValue(0), Result.getValue(1) };
5070 Results.push_back(DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, OpsF, 2));
5071 Results.push_back(Result.getValue(2));
5074 SDValue ARMTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG) const {
5075 switch (Op.getOpcode()) {
5076 default: llvm_unreachable("Don't know how to custom lower this!");
5077 case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
5078 case ISD::BlockAddress: return LowerBlockAddress(Op, DAG);
5079 case ISD::GlobalAddress:
5080 return Subtarget->isTargetDarwin() ? LowerGlobalAddressDarwin(Op, DAG) :
5081 LowerGlobalAddressELF(Op, DAG);
5082 case ISD::GlobalTLSAddress: return LowerGlobalTLSAddress(Op, DAG);
5083 case ISD::SELECT: return LowerSELECT(Op, DAG);
5084 case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
5085 case ISD::BR_CC: return LowerBR_CC(Op, DAG);
5086 case ISD::BR_JT: return LowerBR_JT(Op, DAG);
5087 case ISD::VASTART: return LowerVASTART(Op, DAG);
5088 case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG, Subtarget);
5089 case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG, Subtarget);
5090 case ISD::PREFETCH: return LowerPREFETCH(Op, DAG, Subtarget);
5091 case ISD::SINT_TO_FP:
5092 case ISD::UINT_TO_FP: return LowerINT_TO_FP(Op, DAG);
5093 case ISD::FP_TO_SINT:
5094 case ISD::FP_TO_UINT: return LowerFP_TO_INT(Op, DAG);
5095 case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
5096 case ISD::RETURNADDR: return LowerRETURNADDR(Op, DAG);
5097 case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
5098 case ISD::GLOBAL_OFFSET_TABLE: return LowerGLOBAL_OFFSET_TABLE(Op, DAG);
5099 case ISD::EH_SJLJ_SETJMP: return LowerEH_SJLJ_SETJMP(Op, DAG);
5100 case ISD::EH_SJLJ_LONGJMP: return LowerEH_SJLJ_LONGJMP(Op, DAG);
5101 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG,
5103 case ISD::BITCAST: return ExpandBITCAST(Op.getNode(), DAG);
5106 case ISD::SRA: return LowerShift(Op.getNode(), DAG, Subtarget);
5107 case ISD::SHL_PARTS: return LowerShiftLeftParts(Op, DAG);
5108 case ISD::SRL_PARTS:
5109 case ISD::SRA_PARTS: return LowerShiftRightParts(Op, DAG);
5110 case ISD::CTTZ: return LowerCTTZ(Op.getNode(), DAG, Subtarget);
5111 case ISD::SETCC: return LowerVSETCC(Op, DAG);
5112 case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG, Subtarget);
5113 case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
5114 case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
5115 case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
5116 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
5117 case ISD::FLT_ROUNDS_: return LowerFLT_ROUNDS_(Op, DAG);
5118 case ISD::MUL: return LowerMUL(Op, DAG);
5119 case ISD::SDIV: return LowerSDIV(Op, DAG);
5120 case ISD::UDIV: return LowerUDIV(Op, DAG);
5124 case ISD::SUBE: return LowerADDC_ADDE_SUBC_SUBE(Op, DAG);
5125 case ISD::ATOMIC_LOAD:
5126 case ISD::ATOMIC_STORE: return LowerAtomicLoadStore(Op, DAG);
5130 /// ReplaceNodeResults - Replace the results of node with an illegal result
5131 /// type with new values built out of custom code.
5132 void ARMTargetLowering::ReplaceNodeResults(SDNode *N,
5133 SmallVectorImpl<SDValue>&Results,
5134 SelectionDAG &DAG) const {
5136 switch (N->getOpcode()) {
5138 llvm_unreachable("Don't know how to custom expand this!");
5140 Res = ExpandBITCAST(N, DAG);
5144 Res = Expand64BitShift(N, DAG, Subtarget);
5146 case ISD::ATOMIC_LOAD_ADD:
5147 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMADD64_DAG);
5149 case ISD::ATOMIC_LOAD_AND:
5150 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMAND64_DAG);
5152 case ISD::ATOMIC_LOAD_NAND:
5153 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMNAND64_DAG);
5155 case ISD::ATOMIC_LOAD_OR:
5156 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMOR64_DAG);
5158 case ISD::ATOMIC_LOAD_SUB:
5159 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMSUB64_DAG);
5161 case ISD::ATOMIC_LOAD_XOR:
5162 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMXOR64_DAG);
5164 case ISD::ATOMIC_SWAP:
5165 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMSWAP64_DAG);
5167 case ISD::ATOMIC_CMP_SWAP:
5168 ReplaceATOMIC_OP_64(N, Results, DAG, ARMISD::ATOMCMPXCHG64_DAG);
5172 Results.push_back(Res);
5175 //===----------------------------------------------------------------------===//
5176 // ARM Scheduler Hooks
5177 //===----------------------------------------------------------------------===//
5180 ARMTargetLowering::EmitAtomicCmpSwap(MachineInstr *MI,
5181 MachineBasicBlock *BB,
5182 unsigned Size) const {
5183 unsigned dest = MI->getOperand(0).getReg();
5184 unsigned ptr = MI->getOperand(1).getReg();
5185 unsigned oldval = MI->getOperand(2).getReg();
5186 unsigned newval = MI->getOperand(3).getReg();
5187 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5188 DebugLoc dl = MI->getDebugLoc();
5189 bool isThumb2 = Subtarget->isThumb2();
5191 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5193 MRI.createVirtualRegister(isThumb2 ? ARM::rGPRRegisterClass
5194 : ARM::GPRRegisterClass);
5197 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5198 MRI.constrainRegClass(oldval, ARM::rGPRRegisterClass);
5199 MRI.constrainRegClass(newval, ARM::rGPRRegisterClass);
5202 unsigned ldrOpc, strOpc;
5204 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5206 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5207 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5210 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5211 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5214 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5215 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5219 MachineFunction *MF = BB->getParent();
5220 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5221 MachineFunction::iterator It = BB;
5222 ++It; // insert the new blocks after the current block
5224 MachineBasicBlock *loop1MBB = MF->CreateMachineBasicBlock(LLVM_BB);
5225 MachineBasicBlock *loop2MBB = MF->CreateMachineBasicBlock(LLVM_BB);
5226 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5227 MF->insert(It, loop1MBB);
5228 MF->insert(It, loop2MBB);
5229 MF->insert(It, exitMBB);
5231 // Transfer the remainder of BB and its successor edges to exitMBB.
5232 exitMBB->splice(exitMBB->begin(), BB,
5233 llvm::next(MachineBasicBlock::iterator(MI)),
5235 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5239 // fallthrough --> loop1MBB
5240 BB->addSuccessor(loop1MBB);
5243 // ldrex dest, [ptr]
5247 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5248 if (ldrOpc == ARM::t2LDREX)
5250 AddDefaultPred(MIB);
5251 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5252 .addReg(dest).addReg(oldval));
5253 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5254 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5255 BB->addSuccessor(loop2MBB);
5256 BB->addSuccessor(exitMBB);
5259 // strex scratch, newval, [ptr]
5263 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(newval).addReg(ptr);
5264 if (strOpc == ARM::t2STREX)
5266 AddDefaultPred(MIB);
5267 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5268 .addReg(scratch).addImm(0));
5269 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5270 .addMBB(loop1MBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5271 BB->addSuccessor(loop1MBB);
5272 BB->addSuccessor(exitMBB);
5278 MI->eraseFromParent(); // The instruction is gone now.
5284 ARMTargetLowering::EmitAtomicBinary(MachineInstr *MI, MachineBasicBlock *BB,
5285 unsigned Size, unsigned BinOpcode) const {
5286 // This also handles ATOMIC_SWAP, indicated by BinOpcode==0.
5287 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5289 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5290 MachineFunction *MF = BB->getParent();
5291 MachineFunction::iterator It = BB;
5294 unsigned dest = MI->getOperand(0).getReg();
5295 unsigned ptr = MI->getOperand(1).getReg();
5296 unsigned incr = MI->getOperand(2).getReg();
5297 DebugLoc dl = MI->getDebugLoc();
5298 bool isThumb2 = Subtarget->isThumb2();
5300 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5302 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5303 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5306 unsigned ldrOpc, strOpc;
5308 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5310 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5311 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5314 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5315 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5318 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5319 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5323 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5324 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5325 MF->insert(It, loopMBB);
5326 MF->insert(It, exitMBB);
5328 // Transfer the remainder of BB and its successor edges to exitMBB.
5329 exitMBB->splice(exitMBB->begin(), BB,
5330 llvm::next(MachineBasicBlock::iterator(MI)),
5332 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5334 const TargetRegisterClass *TRC =
5335 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5336 unsigned scratch = MRI.createVirtualRegister(TRC);
5337 unsigned scratch2 = (!BinOpcode) ? incr : MRI.createVirtualRegister(TRC);
5341 // fallthrough --> loopMBB
5342 BB->addSuccessor(loopMBB);
5346 // <binop> scratch2, dest, incr
5347 // strex scratch, scratch2, ptr
5350 // fallthrough --> exitMBB
5352 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5353 if (ldrOpc == ARM::t2LDREX)
5355 AddDefaultPred(MIB);
5357 // operand order needs to go the other way for NAND
5358 if (BinOpcode == ARM::BICrr || BinOpcode == ARM::t2BICrr)
5359 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
5360 addReg(incr).addReg(dest)).addReg(0);
5362 AddDefaultPred(BuildMI(BB, dl, TII->get(BinOpcode), scratch2).
5363 addReg(dest).addReg(incr)).addReg(0);
5366 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2).addReg(ptr);
5367 if (strOpc == ARM::t2STREX)
5369 AddDefaultPred(MIB);
5370 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5371 .addReg(scratch).addImm(0));
5372 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5373 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5375 BB->addSuccessor(loopMBB);
5376 BB->addSuccessor(exitMBB);
5382 MI->eraseFromParent(); // The instruction is gone now.
5388 ARMTargetLowering::EmitAtomicBinaryMinMax(MachineInstr *MI,
5389 MachineBasicBlock *BB,
5392 ARMCC::CondCodes Cond) const {
5393 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5395 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5396 MachineFunction *MF = BB->getParent();
5397 MachineFunction::iterator It = BB;
5400 unsigned dest = MI->getOperand(0).getReg();
5401 unsigned ptr = MI->getOperand(1).getReg();
5402 unsigned incr = MI->getOperand(2).getReg();
5403 unsigned oldval = dest;
5404 DebugLoc dl = MI->getDebugLoc();
5405 bool isThumb2 = Subtarget->isThumb2();
5407 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5409 MRI.constrainRegClass(dest, ARM::rGPRRegisterClass);
5410 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5413 unsigned ldrOpc, strOpc, extendOpc;
5415 default: llvm_unreachable("unsupported size for AtomicCmpSwap!");
5417 ldrOpc = isThumb2 ? ARM::t2LDREXB : ARM::LDREXB;
5418 strOpc = isThumb2 ? ARM::t2STREXB : ARM::STREXB;
5419 extendOpc = isThumb2 ? ARM::t2SXTB : ARM::SXTB;
5422 ldrOpc = isThumb2 ? ARM::t2LDREXH : ARM::LDREXH;
5423 strOpc = isThumb2 ? ARM::t2STREXH : ARM::STREXH;
5424 extendOpc = isThumb2 ? ARM::t2SXTH : ARM::SXTH;
5427 ldrOpc = isThumb2 ? ARM::t2LDREX : ARM::LDREX;
5428 strOpc = isThumb2 ? ARM::t2STREX : ARM::STREX;
5433 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5434 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5435 MF->insert(It, loopMBB);
5436 MF->insert(It, exitMBB);
5438 // Transfer the remainder of BB and its successor edges to exitMBB.
5439 exitMBB->splice(exitMBB->begin(), BB,
5440 llvm::next(MachineBasicBlock::iterator(MI)),
5442 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5444 const TargetRegisterClass *TRC =
5445 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5446 unsigned scratch = MRI.createVirtualRegister(TRC);
5447 unsigned scratch2 = MRI.createVirtualRegister(TRC);
5451 // fallthrough --> loopMBB
5452 BB->addSuccessor(loopMBB);
5456 // (sign extend dest, if required)
5458 // cmov.cond scratch2, dest, incr
5459 // strex scratch, scratch2, ptr
5462 // fallthrough --> exitMBB
5464 MachineInstrBuilder MIB = BuildMI(BB, dl, TII->get(ldrOpc), dest).addReg(ptr);
5465 if (ldrOpc == ARM::t2LDREX)
5467 AddDefaultPred(MIB);
5469 // Sign extend the value, if necessary.
5470 if (signExtend && extendOpc) {
5471 oldval = MRI.createVirtualRegister(ARM::GPRRegisterClass);
5472 AddDefaultPred(BuildMI(BB, dl, TII->get(extendOpc), oldval)
5477 // Build compare and cmov instructions.
5478 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
5479 .addReg(oldval).addReg(incr));
5480 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2MOVCCr : ARM::MOVCCr), scratch2)
5481 .addReg(oldval).addReg(incr).addImm(Cond).addReg(ARM::CPSR);
5483 MIB = BuildMI(BB, dl, TII->get(strOpc), scratch).addReg(scratch2).addReg(ptr);
5484 if (strOpc == ARM::t2STREX)
5486 AddDefaultPred(MIB);
5487 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5488 .addReg(scratch).addImm(0));
5489 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5490 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5492 BB->addSuccessor(loopMBB);
5493 BB->addSuccessor(exitMBB);
5499 MI->eraseFromParent(); // The instruction is gone now.
5505 ARMTargetLowering::EmitAtomicBinary64(MachineInstr *MI, MachineBasicBlock *BB,
5506 unsigned Op1, unsigned Op2,
5507 bool NeedsCarry, bool IsCmpxchg) const {
5508 // This also handles ATOMIC_SWAP, indicated by Op1==0.
5509 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5511 const BasicBlock *LLVM_BB = BB->getBasicBlock();
5512 MachineFunction *MF = BB->getParent();
5513 MachineFunction::iterator It = BB;
5516 unsigned destlo = MI->getOperand(0).getReg();
5517 unsigned desthi = MI->getOperand(1).getReg();
5518 unsigned ptr = MI->getOperand(2).getReg();
5519 unsigned vallo = MI->getOperand(3).getReg();
5520 unsigned valhi = MI->getOperand(4).getReg();
5521 DebugLoc dl = MI->getDebugLoc();
5522 bool isThumb2 = Subtarget->isThumb2();
5524 MachineRegisterInfo &MRI = BB->getParent()->getRegInfo();
5526 MRI.constrainRegClass(destlo, ARM::rGPRRegisterClass);
5527 MRI.constrainRegClass(desthi, ARM::rGPRRegisterClass);
5528 MRI.constrainRegClass(ptr, ARM::rGPRRegisterClass);
5531 unsigned ldrOpc = isThumb2 ? ARM::t2LDREXD : ARM::LDREXD;
5532 unsigned strOpc = isThumb2 ? ARM::t2STREXD : ARM::STREXD;
5534 MachineBasicBlock *loopMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5535 MachineBasicBlock *contBB = 0, *cont2BB = 0;
5537 contBB = MF->CreateMachineBasicBlock(LLVM_BB);
5538 cont2BB = MF->CreateMachineBasicBlock(LLVM_BB);
5540 MachineBasicBlock *exitMBB = MF->CreateMachineBasicBlock(LLVM_BB);
5541 MF->insert(It, loopMBB);
5543 MF->insert(It, contBB);
5544 MF->insert(It, cont2BB);
5546 MF->insert(It, exitMBB);
5548 // Transfer the remainder of BB and its successor edges to exitMBB.
5549 exitMBB->splice(exitMBB->begin(), BB,
5550 llvm::next(MachineBasicBlock::iterator(MI)),
5552 exitMBB->transferSuccessorsAndUpdatePHIs(BB);
5554 const TargetRegisterClass *TRC =
5555 isThumb2 ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5556 unsigned storesuccess = MRI.createVirtualRegister(TRC);
5560 // fallthrough --> loopMBB
5561 BB->addSuccessor(loopMBB);
5564 // ldrexd r2, r3, ptr
5565 // <binopa> r0, r2, incr
5566 // <binopb> r1, r3, incr
5567 // strexd storesuccess, r0, r1, ptr
5568 // cmp storesuccess, #0
5570 // fallthrough --> exitMBB
5572 // Note that the registers are explicitly specified because there is not any
5573 // way to force the register allocator to allocate a register pair.
5575 // FIXME: The hardcoded registers are not necessary for Thumb2, but we
5576 // need to properly enforce the restriction that the two output registers
5577 // for ldrexd must be different.
5580 AddDefaultPred(BuildMI(BB, dl, TII->get(ldrOpc))
5581 .addReg(ARM::R2, RegState::Define)
5582 .addReg(ARM::R3, RegState::Define).addReg(ptr));
5583 // Copy r2/r3 into dest. (This copy will normally be coalesced.)
5584 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), destlo).addReg(ARM::R2);
5585 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), desthi).addReg(ARM::R3);
5589 for (unsigned i = 0; i < 2; i++) {
5590 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr :
5592 .addReg(i == 0 ? destlo : desthi)
5593 .addReg(i == 0 ? vallo : valhi));
5594 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5595 .addMBB(exitMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5596 BB->addSuccessor(exitMBB);
5597 BB->addSuccessor(i == 0 ? contBB : cont2BB);
5598 BB = (i == 0 ? contBB : cont2BB);
5601 // Copy to physregs for strexd
5602 unsigned setlo = MI->getOperand(5).getReg();
5603 unsigned sethi = MI->getOperand(6).getReg();
5604 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R0).addReg(setlo);
5605 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R1).addReg(sethi);
5607 // Perform binary operation
5608 AddDefaultPred(BuildMI(BB, dl, TII->get(Op1), ARM::R0)
5609 .addReg(destlo).addReg(vallo))
5610 .addReg(NeedsCarry ? ARM::CPSR : 0, getDefRegState(NeedsCarry));
5611 AddDefaultPred(BuildMI(BB, dl, TII->get(Op2), ARM::R1)
5612 .addReg(desthi).addReg(valhi)).addReg(0);
5614 // Copy to physregs for strexd
5615 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R0).addReg(vallo);
5616 BuildMI(BB, dl, TII->get(TargetOpcode::COPY), ARM::R1).addReg(valhi);
5620 AddDefaultPred(BuildMI(BB, dl, TII->get(strOpc), storesuccess)
5621 .addReg(ARM::R0).addReg(ARM::R1).addReg(ptr));
5623 AddDefaultPred(BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
5624 .addReg(storesuccess).addImm(0));
5625 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
5626 .addMBB(loopMBB).addImm(ARMCC::NE).addReg(ARM::CPSR);
5628 BB->addSuccessor(loopMBB);
5629 BB->addSuccessor(exitMBB);
5635 MI->eraseFromParent(); // The instruction is gone now.
5640 /// SetupEntryBlockForSjLj - Insert code into the entry block that creates and
5641 /// registers the function context.
5642 void ARMTargetLowering::
5643 SetupEntryBlockForSjLj(MachineInstr *MI, MachineBasicBlock *MBB,
5644 MachineBasicBlock *DispatchBB, int FI) const {
5645 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5646 DebugLoc dl = MI->getDebugLoc();
5647 MachineFunction *MF = MBB->getParent();
5648 MachineRegisterInfo *MRI = &MF->getRegInfo();
5649 MachineConstantPool *MCP = MF->getConstantPool();
5650 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
5651 const Function *F = MF->getFunction();
5653 bool isThumb = Subtarget->isThumb();
5654 bool isThumb2 = Subtarget->isThumb2();
5656 unsigned PCLabelId = AFI->createPICLabelUId();
5657 unsigned PCAdj = (isThumb || isThumb2) ? 4 : 8;
5658 ARMConstantPoolValue *CPV =
5659 ARMConstantPoolMBB::Create(F->getContext(), DispatchBB, PCLabelId, PCAdj);
5660 unsigned CPI = MCP->getConstantPoolIndex(CPV, 4);
5662 const TargetRegisterClass *TRC =
5663 isThumb ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5665 // Grab constant pool and fixed stack memory operands.
5666 MachineMemOperand *CPMMO =
5667 MF->getMachineMemOperand(MachinePointerInfo::getConstantPool(),
5668 MachineMemOperand::MOLoad, 4, 4);
5670 MachineMemOperand *FIMMOSt =
5671 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
5672 MachineMemOperand::MOStore, 4, 4);
5674 // Load the address of the dispatch MBB into the jump buffer.
5676 // Incoming value: jbuf
5677 // ldr.n r5, LCPI1_1
5680 // str r5, [$jbuf, #+4] ; &jbuf[1]
5681 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5682 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2LDRpci), NewVReg1)
5683 .addConstantPoolIndex(CPI)
5684 .addMemOperand(CPMMO));
5685 // Set the low bit because of thumb mode.
5686 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5688 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2ORRri), NewVReg2)
5689 .addReg(NewVReg1, RegState::Kill)
5691 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5692 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg3)
5693 .addReg(NewVReg2, RegState::Kill)
5695 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::t2STRi12))
5696 .addReg(NewVReg3, RegState::Kill)
5698 .addImm(36) // &jbuf[1] :: pc
5699 .addMemOperand(FIMMOSt));
5700 } else if (isThumb) {
5701 // Incoming value: jbuf
5702 // ldr.n r1, LCPI1_4
5706 // add r2, $jbuf, #+4 ; &jbuf[1]
5708 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5709 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tLDRpci), NewVReg1)
5710 .addConstantPoolIndex(CPI)
5711 .addMemOperand(CPMMO));
5712 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5713 BuildMI(*MBB, MI, dl, TII->get(ARM::tPICADD), NewVReg2)
5714 .addReg(NewVReg1, RegState::Kill)
5716 // Set the low bit because of thumb mode.
5717 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5718 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tMOVi8), NewVReg3)
5719 .addReg(ARM::CPSR, RegState::Define)
5721 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
5722 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tORR), NewVReg4)
5723 .addReg(ARM::CPSR, RegState::Define)
5724 .addReg(NewVReg2, RegState::Kill)
5725 .addReg(NewVReg3, RegState::Kill));
5726 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
5727 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tADDrSPi), NewVReg5)
5729 .addImm(36)); // &jbuf[1] :: pc
5730 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::tSTRi))
5731 .addReg(NewVReg4, RegState::Kill)
5732 .addReg(NewVReg5, RegState::Kill)
5734 .addMemOperand(FIMMOSt));
5736 // Incoming value: jbuf
5739 // str r1, [$jbuf, #+4] ; &jbuf[1]
5740 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5741 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::LDRi12), NewVReg1)
5742 .addConstantPoolIndex(CPI)
5744 .addMemOperand(CPMMO));
5745 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5746 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::PICADD), NewVReg2)
5747 .addReg(NewVReg1, RegState::Kill)
5748 .addImm(PCLabelId));
5749 AddDefaultPred(BuildMI(*MBB, MI, dl, TII->get(ARM::STRi12))
5750 .addReg(NewVReg2, RegState::Kill)
5752 .addImm(36) // &jbuf[1] :: pc
5753 .addMemOperand(FIMMOSt));
5757 MachineBasicBlock *ARMTargetLowering::
5758 EmitSjLjDispatchBlock(MachineInstr *MI, MachineBasicBlock *MBB) const {
5759 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
5760 DebugLoc dl = MI->getDebugLoc();
5761 MachineFunction *MF = MBB->getParent();
5762 MachineRegisterInfo *MRI = &MF->getRegInfo();
5763 ARMFunctionInfo *AFI = MF->getInfo<ARMFunctionInfo>();
5764 MachineFrameInfo *MFI = MF->getFrameInfo();
5765 int FI = MFI->getFunctionContextIndex();
5767 const TargetRegisterClass *TRC =
5768 Subtarget->isThumb() ? ARM::tGPRRegisterClass : ARM::GPRRegisterClass;
5770 // Get a mapping of the call site numbers to all of the landing pads they're
5772 DenseMap<unsigned, SmallVector<MachineBasicBlock*, 2> > CallSiteNumToLPad;
5773 unsigned MaxCSNum = 0;
5774 MachineModuleInfo &MMI = MF->getMMI();
5775 for (MachineFunction::iterator BB = MF->begin(), E = MF->end(); BB != E; ++BB) {
5776 if (!BB->isLandingPad()) continue;
5778 // FIXME: We should assert that the EH_LABEL is the first MI in the landing
5780 for (MachineBasicBlock::iterator
5781 II = BB->begin(), IE = BB->end(); II != IE; ++II) {
5782 if (!II->isEHLabel()) continue;
5784 MCSymbol *Sym = II->getOperand(0).getMCSymbol();
5785 if (!MMI.hasCallSiteLandingPad(Sym)) continue;
5787 SmallVectorImpl<unsigned> &CallSiteIdxs = MMI.getCallSiteLandingPad(Sym);
5788 for (SmallVectorImpl<unsigned>::iterator
5789 CSI = CallSiteIdxs.begin(), CSE = CallSiteIdxs.end();
5790 CSI != CSE; ++CSI) {
5791 CallSiteNumToLPad[*CSI].push_back(BB);
5792 MaxCSNum = std::max(MaxCSNum, *CSI);
5798 // Get an ordered list of the machine basic blocks for the jump table.
5799 std::vector<MachineBasicBlock*> LPadList;
5800 SmallPtrSet<MachineBasicBlock*, 64> InvokeBBs;
5801 LPadList.reserve(CallSiteNumToLPad.size());
5802 for (unsigned I = 1; I <= MaxCSNum; ++I) {
5803 SmallVectorImpl<MachineBasicBlock*> &MBBList = CallSiteNumToLPad[I];
5804 for (SmallVectorImpl<MachineBasicBlock*>::iterator
5805 II = MBBList.begin(), IE = MBBList.end(); II != IE; ++II) {
5806 LPadList.push_back(*II);
5807 InvokeBBs.insert((*II)->pred_begin(), (*II)->pred_end());
5811 assert(!LPadList.empty() &&
5812 "No landing pad destinations for the dispatch jump table!");
5814 // Create the jump table and associated information.
5815 MachineJumpTableInfo *JTI =
5816 MF->getOrCreateJumpTableInfo(MachineJumpTableInfo::EK_Inline);
5817 unsigned MJTI = JTI->createJumpTableIndex(LPadList);
5818 unsigned UId = AFI->createJumpTableUId();
5820 // Create the MBBs for the dispatch code.
5822 // Shove the dispatch's address into the return slot in the function context.
5823 MachineBasicBlock *DispatchBB = MF->CreateMachineBasicBlock();
5824 DispatchBB->setIsLandingPad();
5826 MachineBasicBlock *TrapBB = MF->CreateMachineBasicBlock();
5827 BuildMI(TrapBB, dl, TII->get(Subtarget->isThumb() ? ARM::tTRAP : ARM::TRAP));
5828 DispatchBB->addSuccessor(TrapBB);
5830 MachineBasicBlock *DispContBB = MF->CreateMachineBasicBlock();
5831 DispatchBB->addSuccessor(DispContBB);
5834 MF->insert(MF->end(), DispatchBB);
5835 MF->insert(MF->end(), DispContBB);
5836 MF->insert(MF->end(), TrapBB);
5838 // Insert code into the entry block that creates and registers the function
5840 SetupEntryBlockForSjLj(MI, MBB, DispatchBB, FI);
5842 MachineMemOperand *FIMMOLd =
5843 MF->getMachineMemOperand(MachinePointerInfo::getFixedStack(FI),
5844 MachineMemOperand::MOLoad |
5845 MachineMemOperand::MOVolatile, 4, 4);
5847 if (AFI->isThumb1OnlyFunction())
5848 BuildMI(DispatchBB, dl, TII->get(ARM::tInt_eh_sjlj_dispatchsetup));
5849 else if (!Subtarget->hasVFP2())
5850 BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup_nofp));
5852 BuildMI(DispatchBB, dl, TII->get(ARM::Int_eh_sjlj_dispatchsetup));
5854 unsigned NumLPads = LPadList.size();
5855 if (Subtarget->isThumb2()) {
5856 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5857 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2LDRi12), NewVReg1)
5860 .addMemOperand(FIMMOLd));
5862 if (NumLPads < 256) {
5863 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPri))
5865 .addImm(LPadList.size()));
5867 unsigned VReg1 = MRI->createVirtualRegister(TRC);
5868 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVi16), VReg1)
5869 .addImm(NumLPads & 0xFFFF));
5871 unsigned VReg2 = VReg1;
5872 if ((NumLPads & 0xFFFF0000) != 0) {
5873 VReg2 = MRI->createVirtualRegister(TRC);
5874 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVTi16), VReg2)
5876 .addImm(NumLPads >> 16));
5879 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPrr))
5884 BuildMI(DispatchBB, dl, TII->get(ARM::t2Bcc))
5889 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5890 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::t2LEApcrelJT),NewVReg3)
5891 .addJumpTableIndex(MJTI)
5894 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
5897 BuildMI(DispContBB, dl, TII->get(ARM::t2ADDrs), NewVReg4)
5898 .addReg(NewVReg3, RegState::Kill)
5900 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
5902 BuildMI(DispContBB, dl, TII->get(ARM::t2BR_JT))
5903 .addReg(NewVReg4, RegState::Kill)
5905 .addJumpTableIndex(MJTI)
5907 } else if (Subtarget->isThumb()) {
5908 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5909 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRspi), NewVReg1)
5912 .addMemOperand(FIMMOLd));
5914 if (NumLPads < 256) {
5915 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPi8))
5919 MachineConstantPool *ConstantPool = MF->getConstantPool();
5920 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
5921 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
5923 // MachineConstantPool wants an explicit alignment.
5924 unsigned Align = getTargetData()->getPrefTypeAlignment(Int32Ty);
5926 Align = getTargetData()->getTypeAllocSize(C->getType());
5927 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
5929 unsigned VReg1 = MRI->createVirtualRegister(TRC);
5930 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tLDRpci))
5931 .addReg(VReg1, RegState::Define)
5932 .addConstantPoolIndex(Idx));
5933 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::tCMPr))
5938 BuildMI(DispatchBB, dl, TII->get(ARM::tBcc))
5943 unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
5944 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLSLri), NewVReg2)
5945 .addReg(ARM::CPSR, RegState::Define)
5949 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
5950 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLEApcrelJT), NewVReg3)
5951 .addJumpTableIndex(MJTI)
5954 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
5955 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg4)
5956 .addReg(ARM::CPSR, RegState::Define)
5957 .addReg(NewVReg2, RegState::Kill)
5960 MachineMemOperand *JTMMOLd =
5961 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
5962 MachineMemOperand::MOLoad, 4, 4);
5964 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
5965 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tLDRi), NewVReg5)
5966 .addReg(NewVReg4, RegState::Kill)
5968 .addMemOperand(JTMMOLd));
5970 unsigned NewVReg6 = MRI->createVirtualRegister(TRC);
5971 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::tADDrr), NewVReg6)
5972 .addReg(ARM::CPSR, RegState::Define)
5973 .addReg(NewVReg5, RegState::Kill)
5976 BuildMI(DispContBB, dl, TII->get(ARM::tBR_JTr))
5977 .addReg(NewVReg6, RegState::Kill)
5978 .addJumpTableIndex(MJTI)
5981 unsigned NewVReg1 = MRI->createVirtualRegister(TRC);
5982 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRi12), NewVReg1)
5985 .addMemOperand(FIMMOLd));
5987 if (NumLPads < 256) {
5988 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPri))
5991 } else if (Subtarget->hasV6T2Ops() && isUInt<16>(NumLPads)) {
5992 unsigned VReg1 = MRI->createVirtualRegister(TRC);
5993 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVi16), VReg1)
5994 .addImm(NumLPads & 0xFFFF));
5996 unsigned VReg2 = VReg1;
5997 if ((NumLPads & 0xFFFF0000) != 0) {
5998 VReg2 = MRI->createVirtualRegister(TRC);
5999 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::MOVTi16), VReg2)
6001 .addImm(NumLPads >> 16));
6004 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
6008 MachineConstantPool *ConstantPool = MF->getConstantPool();
6009 Type *Int32Ty = Type::getInt32Ty(MF->getFunction()->getContext());
6010 const Constant *C = ConstantInt::get(Int32Ty, NumLPads);
6012 // MachineConstantPool wants an explicit alignment.
6013 unsigned Align = getTargetData()->getPrefTypeAlignment(Int32Ty);
6015 Align = getTargetData()->getTypeAllocSize(C->getType());
6016 unsigned Idx = ConstantPool->getConstantPoolIndex(C, Align);
6018 unsigned VReg1 = MRI->createVirtualRegister(TRC);
6019 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::LDRcp))
6020 .addReg(VReg1, RegState::Define)
6021 .addConstantPoolIndex(Idx)
6023 AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::CMPrr))
6025 .addReg(VReg1, RegState::Kill));
6028 BuildMI(DispatchBB, dl, TII->get(ARM::Bcc))
6033 unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
6035 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::MOVsi), NewVReg3)
6037 .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
6038 unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
6039 AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::LEApcrelJT), NewVReg4)
6040 .addJumpTableIndex(MJTI)
6043 MachineMemOperand *JTMMOLd =
6044 MF->getMachineMemOperand(MachinePointerInfo::getJumpTable(),
6045 MachineMemOperand::MOLoad, 4, 4);
6046 unsigned NewVReg5 = MRI->createVirtualRegister(TRC);
6048 BuildMI(DispContBB, dl, TII->get(ARM::LDRrs), NewVReg5)
6049 .addReg(NewVReg3, RegState::Kill)
6052 .addMemOperand(JTMMOLd));
6054 BuildMI(DispContBB, dl, TII->get(ARM::BR_JTadd))
6055 .addReg(NewVReg5, RegState::Kill)
6057 .addJumpTableIndex(MJTI)
6061 // Add the jump table entries as successors to the MBB.
6062 MachineBasicBlock *PrevMBB = 0;
6063 for (std::vector<MachineBasicBlock*>::iterator
6064 I = LPadList.begin(), E = LPadList.end(); I != E; ++I) {
6065 MachineBasicBlock *CurMBB = *I;
6066 if (PrevMBB != CurMBB)
6067 DispContBB->addSuccessor(CurMBB);
6071 // N.B. the order the invoke BBs are processed in doesn't matter here.
6072 const ARMBaseInstrInfo *AII = static_cast<const ARMBaseInstrInfo*>(TII);
6073 const ARMBaseRegisterInfo &RI = AII->getRegisterInfo();
6074 const unsigned *SavedRegs = RI.getCalleeSavedRegs(MF);
6075 SmallVector<MachineBasicBlock*, 64> MBBLPads;
6076 for (SmallPtrSet<MachineBasicBlock*, 64>::iterator
6077 I = InvokeBBs.begin(), E = InvokeBBs.end(); I != E; ++I) {
6078 MachineBasicBlock *BB = *I;
6080 // Remove the landing pad successor from the invoke block and replace it
6081 // with the new dispatch block.
6082 SmallVector<MachineBasicBlock*, 4> Successors(BB->succ_begin(),
6084 while (!Successors.empty()) {
6085 MachineBasicBlock *SMBB = Successors.pop_back_val();
6086 if (SMBB->isLandingPad()) {
6087 BB->removeSuccessor(SMBB);
6088 MBBLPads.push_back(SMBB);
6092 BB->addSuccessor(DispatchBB);
6094 // Find the invoke call and mark all of the callee-saved registers as
6095 // 'implicit defined' so that they're spilled. This prevents code from
6096 // moving instructions to before the EH block, where they will never be
6098 for (MachineBasicBlock::reverse_iterator
6099 II = BB->rbegin(), IE = BB->rend(); II != IE; ++II) {
6100 if (!II->isCall()) continue;
6102 DenseMap<unsigned, bool> DefRegs;
6103 for (MachineInstr::mop_iterator
6104 OI = II->operands_begin(), OE = II->operands_end();
6106 if (!OI->isReg()) continue;
6107 DefRegs[OI->getReg()] = true;
6110 MachineInstrBuilder MIB(&*II);
6112 for (unsigned i = 0; SavedRegs[i] != 0; ++i) {
6113 unsigned Reg = SavedRegs[i];
6114 if (Subtarget->isThumb2() &&
6115 !ARM::tGPRRegisterClass->contains(Reg) &&
6116 !ARM::hGPRRegisterClass->contains(Reg))
6118 else if (Subtarget->isThumb1Only() &&
6119 !ARM::tGPRRegisterClass->contains(Reg))
6121 else if (!Subtarget->isThumb() &&
6122 !ARM::GPRRegisterClass->contains(Reg))
6125 MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead);
6132 // Mark all former landing pads as non-landing pads. The dispatch is the only
6134 for (SmallVectorImpl<MachineBasicBlock*>::iterator
6135 I = MBBLPads.begin(), E = MBBLPads.end(); I != E; ++I)
6136 (*I)->setIsLandingPad(false);
6138 // The instruction is gone now.
6139 MI->eraseFromParent();
6145 MachineBasicBlock *OtherSucc(MachineBasicBlock *MBB, MachineBasicBlock *Succ) {
6146 for (MachineBasicBlock::succ_iterator I = MBB->succ_begin(),
6147 E = MBB->succ_end(); I != E; ++I)
6150 llvm_unreachable("Expecting a BB with two successors!");
6154 ARMTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
6155 MachineBasicBlock *BB) const {
6156 const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
6157 DebugLoc dl = MI->getDebugLoc();
6158 bool isThumb2 = Subtarget->isThumb2();
6159 switch (MI->getOpcode()) {
6162 llvm_unreachable("Unexpected instr type to insert");
6164 // The Thumb2 pre-indexed stores have the same MI operands, they just
6165 // define them differently in the .td files from the isel patterns, so
6166 // they need pseudos.
6167 case ARM::t2STR_preidx:
6168 MI->setDesc(TII->get(ARM::t2STR_PRE));
6170 case ARM::t2STRB_preidx:
6171 MI->setDesc(TII->get(ARM::t2STRB_PRE));
6173 case ARM::t2STRH_preidx:
6174 MI->setDesc(TII->get(ARM::t2STRH_PRE));
6177 case ARM::STRi_preidx:
6178 case ARM::STRBi_preidx: {
6179 unsigned NewOpc = MI->getOpcode() == ARM::STRi_preidx ?
6180 ARM::STR_PRE_IMM : ARM::STRB_PRE_IMM;
6181 // Decode the offset.
6182 unsigned Offset = MI->getOperand(4).getImm();
6183 bool isSub = ARM_AM::getAM2Op(Offset) == ARM_AM::sub;
6184 Offset = ARM_AM::getAM2Offset(Offset);
6188 MachineMemOperand *MMO = *MI->memoperands_begin();
6189 BuildMI(*BB, MI, dl, TII->get(NewOpc))
6190 .addOperand(MI->getOperand(0)) // Rn_wb
6191 .addOperand(MI->getOperand(1)) // Rt
6192 .addOperand(MI->getOperand(2)) // Rn
6193 .addImm(Offset) // offset (skip GPR==zero_reg)
6194 .addOperand(MI->getOperand(5)) // pred
6195 .addOperand(MI->getOperand(6))
6196 .addMemOperand(MMO);
6197 MI->eraseFromParent();
6200 case ARM::STRr_preidx:
6201 case ARM::STRBr_preidx:
6202 case ARM::STRH_preidx: {
6204 switch (MI->getOpcode()) {
6205 default: llvm_unreachable("unexpected opcode!");
6206 case ARM::STRr_preidx: NewOpc = ARM::STR_PRE_REG; break;
6207 case ARM::STRBr_preidx: NewOpc = ARM::STRB_PRE_REG; break;
6208 case ARM::STRH_preidx: NewOpc = ARM::STRH_PRE; break;
6210 MachineInstrBuilder MIB = BuildMI(*BB, MI, dl, TII->get(NewOpc));
6211 for (unsigned i = 0; i < MI->getNumOperands(); ++i)
6212 MIB.addOperand(MI->getOperand(i));
6213 MI->eraseFromParent();
6216 case ARM::ATOMIC_LOAD_ADD_I8:
6217 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6218 case ARM::ATOMIC_LOAD_ADD_I16:
6219 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6220 case ARM::ATOMIC_LOAD_ADD_I32:
6221 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr);
6223 case ARM::ATOMIC_LOAD_AND_I8:
6224 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6225 case ARM::ATOMIC_LOAD_AND_I16:
6226 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6227 case ARM::ATOMIC_LOAD_AND_I32:
6228 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6230 case ARM::ATOMIC_LOAD_OR_I8:
6231 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6232 case ARM::ATOMIC_LOAD_OR_I16:
6233 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6234 case ARM::ATOMIC_LOAD_OR_I32:
6235 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6237 case ARM::ATOMIC_LOAD_XOR_I8:
6238 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6239 case ARM::ATOMIC_LOAD_XOR_I16:
6240 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6241 case ARM::ATOMIC_LOAD_XOR_I32:
6242 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6244 case ARM::ATOMIC_LOAD_NAND_I8:
6245 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6246 case ARM::ATOMIC_LOAD_NAND_I16:
6247 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6248 case ARM::ATOMIC_LOAD_NAND_I32:
6249 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2BICrr : ARM::BICrr);
6251 case ARM::ATOMIC_LOAD_SUB_I8:
6252 return EmitAtomicBinary(MI, BB, 1, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6253 case ARM::ATOMIC_LOAD_SUB_I16:
6254 return EmitAtomicBinary(MI, BB, 2, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6255 case ARM::ATOMIC_LOAD_SUB_I32:
6256 return EmitAtomicBinary(MI, BB, 4, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr);
6258 case ARM::ATOMIC_LOAD_MIN_I8:
6259 return EmitAtomicBinaryMinMax(MI, BB, 1, true, ARMCC::LT);
6260 case ARM::ATOMIC_LOAD_MIN_I16:
6261 return EmitAtomicBinaryMinMax(MI, BB, 2, true, ARMCC::LT);
6262 case ARM::ATOMIC_LOAD_MIN_I32:
6263 return EmitAtomicBinaryMinMax(MI, BB, 4, true, ARMCC::LT);
6265 case ARM::ATOMIC_LOAD_MAX_I8:
6266 return EmitAtomicBinaryMinMax(MI, BB, 1, true, ARMCC::GT);
6267 case ARM::ATOMIC_LOAD_MAX_I16:
6268 return EmitAtomicBinaryMinMax(MI, BB, 2, true, ARMCC::GT);
6269 case ARM::ATOMIC_LOAD_MAX_I32:
6270 return EmitAtomicBinaryMinMax(MI, BB, 4, true, ARMCC::GT);
6272 case ARM::ATOMIC_LOAD_UMIN_I8:
6273 return EmitAtomicBinaryMinMax(MI, BB, 1, false, ARMCC::LO);
6274 case ARM::ATOMIC_LOAD_UMIN_I16:
6275 return EmitAtomicBinaryMinMax(MI, BB, 2, false, ARMCC::LO);
6276 case ARM::ATOMIC_LOAD_UMIN_I32:
6277 return EmitAtomicBinaryMinMax(MI, BB, 4, false, ARMCC::LO);
6279 case ARM::ATOMIC_LOAD_UMAX_I8:
6280 return EmitAtomicBinaryMinMax(MI, BB, 1, false, ARMCC::HI);
6281 case ARM::ATOMIC_LOAD_UMAX_I16:
6282 return EmitAtomicBinaryMinMax(MI, BB, 2, false, ARMCC::HI);
6283 case ARM::ATOMIC_LOAD_UMAX_I32:
6284 return EmitAtomicBinaryMinMax(MI, BB, 4, false, ARMCC::HI);
6286 case ARM::ATOMIC_SWAP_I8: return EmitAtomicBinary(MI, BB, 1, 0);
6287 case ARM::ATOMIC_SWAP_I16: return EmitAtomicBinary(MI, BB, 2, 0);
6288 case ARM::ATOMIC_SWAP_I32: return EmitAtomicBinary(MI, BB, 4, 0);
6290 case ARM::ATOMIC_CMP_SWAP_I8: return EmitAtomicCmpSwap(MI, BB, 1);
6291 case ARM::ATOMIC_CMP_SWAP_I16: return EmitAtomicCmpSwap(MI, BB, 2);
6292 case ARM::ATOMIC_CMP_SWAP_I32: return EmitAtomicCmpSwap(MI, BB, 4);
6295 case ARM::ATOMADD6432:
6296 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ADDrr : ARM::ADDrr,
6297 isThumb2 ? ARM::t2ADCrr : ARM::ADCrr,
6298 /*NeedsCarry*/ true);
6299 case ARM::ATOMSUB6432:
6300 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr,
6301 isThumb2 ? ARM::t2SBCrr : ARM::SBCrr,
6302 /*NeedsCarry*/ true);
6303 case ARM::ATOMOR6432:
6304 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ORRrr : ARM::ORRrr,
6305 isThumb2 ? ARM::t2ORRrr : ARM::ORRrr);
6306 case ARM::ATOMXOR6432:
6307 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2EORrr : ARM::EORrr,
6308 isThumb2 ? ARM::t2EORrr : ARM::EORrr);
6309 case ARM::ATOMAND6432:
6310 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2ANDrr : ARM::ANDrr,
6311 isThumb2 ? ARM::t2ANDrr : ARM::ANDrr);
6312 case ARM::ATOMSWAP6432:
6313 return EmitAtomicBinary64(MI, BB, 0, 0, false);
6314 case ARM::ATOMCMPXCHG6432:
6315 return EmitAtomicBinary64(MI, BB, isThumb2 ? ARM::t2SUBrr : ARM::SUBrr,
6316 isThumb2 ? ARM::t2SBCrr : ARM::SBCrr,
6317 /*NeedsCarry*/ false, /*IsCmpxchg*/true);
6319 case ARM::tMOVCCr_pseudo: {
6320 // To "insert" a SELECT_CC instruction, we actually have to insert the
6321 // diamond control-flow pattern. The incoming instruction knows the
6322 // destination vreg to set, the condition code register to branch on, the
6323 // true/false values to select between, and a branch opcode to use.
6324 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6325 MachineFunction::iterator It = BB;
6331 // cmpTY ccX, r1, r2
6333 // fallthrough --> copy0MBB
6334 MachineBasicBlock *thisMBB = BB;
6335 MachineFunction *F = BB->getParent();
6336 MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
6337 MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
6338 F->insert(It, copy0MBB);
6339 F->insert(It, sinkMBB);
6341 // Transfer the remainder of BB and its successor edges to sinkMBB.
6342 sinkMBB->splice(sinkMBB->begin(), BB,
6343 llvm::next(MachineBasicBlock::iterator(MI)),
6345 sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
6347 BB->addSuccessor(copy0MBB);
6348 BB->addSuccessor(sinkMBB);
6350 BuildMI(BB, dl, TII->get(ARM::tBcc)).addMBB(sinkMBB)
6351 .addImm(MI->getOperand(3).getImm()).addReg(MI->getOperand(4).getReg());
6354 // %FalseValue = ...
6355 // # fallthrough to sinkMBB
6358 // Update machine-CFG edges
6359 BB->addSuccessor(sinkMBB);
6362 // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
6365 BuildMI(*BB, BB->begin(), dl,
6366 TII->get(ARM::PHI), MI->getOperand(0).getReg())
6367 .addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
6368 .addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
6370 MI->eraseFromParent(); // The pseudo instruction is gone now.
6375 case ARM::BCCZi64: {
6376 // If there is an unconditional branch to the other successor, remove it.
6377 BB->erase(llvm::next(MachineBasicBlock::iterator(MI)), BB->end());
6379 // Compare both parts that make up the double comparison separately for
6381 bool RHSisZero = MI->getOpcode() == ARM::BCCZi64;
6383 unsigned LHS1 = MI->getOperand(1).getReg();
6384 unsigned LHS2 = MI->getOperand(2).getReg();
6386 AddDefaultPred(BuildMI(BB, dl,
6387 TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
6388 .addReg(LHS1).addImm(0));
6389 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPri : ARM::CMPri))
6390 .addReg(LHS2).addImm(0)
6391 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
6393 unsigned RHS1 = MI->getOperand(3).getReg();
6394 unsigned RHS2 = MI->getOperand(4).getReg();
6395 AddDefaultPred(BuildMI(BB, dl,
6396 TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
6397 .addReg(LHS1).addReg(RHS1));
6398 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2CMPrr : ARM::CMPrr))
6399 .addReg(LHS2).addReg(RHS2)
6400 .addImm(ARMCC::EQ).addReg(ARM::CPSR);
6403 MachineBasicBlock *destMBB = MI->getOperand(RHSisZero ? 3 : 5).getMBB();
6404 MachineBasicBlock *exitMBB = OtherSucc(BB, destMBB);
6405 if (MI->getOperand(0).getImm() == ARMCC::NE)
6406 std::swap(destMBB, exitMBB);
6408 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc))
6409 .addMBB(destMBB).addImm(ARMCC::EQ).addReg(ARM::CPSR);
6411 AddDefaultPred(BuildMI(BB, dl, TII->get(ARM::t2B)).addMBB(exitMBB));
6413 BuildMI(BB, dl, TII->get(ARM::B)) .addMBB(exitMBB);
6415 MI->eraseFromParent(); // The pseudo instruction is gone now.
6419 case ARM::Int_eh_sjlj_setjmp:
6420 case ARM::Int_eh_sjlj_setjmp_nofp:
6421 case ARM::tInt_eh_sjlj_setjmp:
6422 case ARM::t2Int_eh_sjlj_setjmp:
6423 case ARM::t2Int_eh_sjlj_setjmp_nofp:
6424 EmitSjLjDispatchBlock(MI, BB);
6429 // To insert an ABS instruction, we have to insert the
6430 // diamond control-flow pattern. The incoming instruction knows the
6431 // source vreg to test against 0, the destination vreg to set,
6432 // the condition code register to branch on, the
6433 // true/false values to select between, and a branch opcode to use.
6438 // BCC (branch to SinkBB if V0 >= 0)
6439 // RSBBB: V3 = RSBri V2, 0 (compute ABS if V2 < 0)
6440 // SinkBB: V1 = PHI(V2, V3)
6441 const BasicBlock *LLVM_BB = BB->getBasicBlock();
6442 MachineFunction::iterator BBI = BB;
6444 MachineFunction *Fn = BB->getParent();
6445 MachineBasicBlock *RSBBB = Fn->CreateMachineBasicBlock(LLVM_BB);
6446 MachineBasicBlock *SinkBB = Fn->CreateMachineBasicBlock(LLVM_BB);
6447 Fn->insert(BBI, RSBBB);
6448 Fn->insert(BBI, SinkBB);
6450 unsigned int ABSSrcReg = MI->getOperand(1).getReg();
6451 unsigned int ABSDstReg = MI->getOperand(0).getReg();
6452 bool isThumb2 = Subtarget->isThumb2();
6453 MachineRegisterInfo &MRI = Fn->getRegInfo();
6454 // In Thumb mode S must not be specified if source register is the SP or
6455 // PC and if destination register is the SP, so restrict register class
6456 unsigned NewMovDstReg = MRI.createVirtualRegister(
6457 isThumb2 ? ARM::rGPRRegisterClass : ARM::GPRRegisterClass);
6458 unsigned NewRsbDstReg = MRI.createVirtualRegister(
6459 isThumb2 ? ARM::rGPRRegisterClass : ARM::GPRRegisterClass);
6461 // Transfer the remainder of BB and its successor edges to sinkMBB.
6462 SinkBB->splice(SinkBB->begin(), BB,
6463 llvm::next(MachineBasicBlock::iterator(MI)),
6465 SinkBB->transferSuccessorsAndUpdatePHIs(BB);
6467 BB->addSuccessor(RSBBB);
6468 BB->addSuccessor(SinkBB);
6470 // fall through to SinkMBB
6471 RSBBB->addSuccessor(SinkBB);
6473 // insert a movs at the end of BB
6474 BuildMI(BB, dl, TII->get(isThumb2 ? ARM::t2MOVr : ARM::MOVr),
6476 .addReg(ABSSrcReg, RegState::Kill)
6477 .addImm((unsigned)ARMCC::AL).addReg(0)
6478 .addReg(ARM::CPSR, RegState::Define);
6480 // insert a bcc with opposite CC to ARMCC::MI at the end of BB
6482 TII->get(isThumb2 ? ARM::t2Bcc : ARM::Bcc)).addMBB(SinkBB)
6483 .addImm(ARMCC::getOppositeCondition(ARMCC::MI)).addReg(ARM::CPSR);
6485 // insert rsbri in RSBBB
6486 // Note: BCC and rsbri will be converted into predicated rsbmi
6487 // by if-conversion pass
6488 BuildMI(*RSBBB, RSBBB->begin(), dl,
6489 TII->get(isThumb2 ? ARM::t2RSBri : ARM::RSBri), NewRsbDstReg)
6490 .addReg(NewMovDstReg, RegState::Kill)
6491 .addImm(0).addImm((unsigned)ARMCC::AL).addReg(0).addReg(0);
6493 // insert PHI in SinkBB,
6494 // reuse ABSDstReg to not change uses of ABS instruction
6495 BuildMI(*SinkBB, SinkBB->begin(), dl,
6496 TII->get(ARM::PHI), ABSDstReg)
6497 .addReg(NewRsbDstReg).addMBB(RSBBB)
6498 .addReg(NewMovDstReg).addMBB(BB);
6500 // remove ABS instruction
6501 MI->eraseFromParent();
6503 // return last added BB
6509 void ARMTargetLowering::AdjustInstrPostInstrSelection(MachineInstr *MI,
6510 SDNode *Node) const {
6511 if (!MI->hasPostISelHook()) {
6512 assert(!convertAddSubFlagsOpcode(MI->getOpcode()) &&
6513 "Pseudo flag-setting opcodes must be marked with 'hasPostISelHook'");
6517 const MCInstrDesc *MCID = &MI->getDesc();
6518 // Adjust potentially 's' setting instructions after isel, i.e. ADC, SBC, RSB,
6519 // RSC. Coming out of isel, they have an implicit CPSR def, but the optional
6520 // operand is still set to noreg. If needed, set the optional operand's
6521 // register to CPSR, and remove the redundant implicit def.
6523 // e.g. ADCS (..., CPSR<imp-def>) -> ADC (... opt:CPSR<def>).
6525 // Rename pseudo opcodes.
6526 unsigned NewOpc = convertAddSubFlagsOpcode(MI->getOpcode());
6528 const ARMBaseInstrInfo *TII =
6529 static_cast<const ARMBaseInstrInfo*>(getTargetMachine().getInstrInfo());
6530 MCID = &TII->get(NewOpc);
6532 assert(MCID->getNumOperands() == MI->getDesc().getNumOperands() + 1 &&
6533 "converted opcode should be the same except for cc_out");
6537 // Add the optional cc_out operand
6538 MI->addOperand(MachineOperand::CreateReg(0, /*isDef=*/true));
6540 unsigned ccOutIdx = MCID->getNumOperands() - 1;
6542 // Any ARM instruction that sets the 's' bit should specify an optional
6543 // "cc_out" operand in the last operand position.
6544 if (!MI->hasOptionalDef() || !MCID->OpInfo[ccOutIdx].isOptionalDef()) {
6545 assert(!NewOpc && "Optional cc_out operand required");
6548 // Look for an implicit def of CPSR added by MachineInstr ctor. Remove it
6549 // since we already have an optional CPSR def.
6550 bool definesCPSR = false;
6551 bool deadCPSR = false;
6552 for (unsigned i = MCID->getNumOperands(), e = MI->getNumOperands();
6554 const MachineOperand &MO = MI->getOperand(i);
6555 if (MO.isReg() && MO.isDef() && MO.getReg() == ARM::CPSR) {
6559 MI->RemoveOperand(i);
6564 assert(!NewOpc && "Optional cc_out operand required");
6567 assert(deadCPSR == !Node->hasAnyUseOfValue(1) && "inconsistent dead flag");
6569 assert(!MI->getOperand(ccOutIdx).getReg() &&
6570 "expect uninitialized optional cc_out operand");
6574 // If this instruction was defined with an optional CPSR def and its dag node
6575 // had a live implicit CPSR def, then activate the optional CPSR def.
6576 MachineOperand &MO = MI->getOperand(ccOutIdx);
6577 MO.setReg(ARM::CPSR);
6581 //===----------------------------------------------------------------------===//
6582 // ARM Optimization Hooks
6583 //===----------------------------------------------------------------------===//
6586 SDValue combineSelectAndUse(SDNode *N, SDValue Slct, SDValue OtherOp,
6587 TargetLowering::DAGCombinerInfo &DCI) {
6588 SelectionDAG &DAG = DCI.DAG;
6589 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
6590 EVT VT = N->getValueType(0);
6591 unsigned Opc = N->getOpcode();
6592 bool isSlctCC = Slct.getOpcode() == ISD::SELECT_CC;
6593 SDValue LHS = isSlctCC ? Slct.getOperand(2) : Slct.getOperand(1);
6594 SDValue RHS = isSlctCC ? Slct.getOperand(3) : Slct.getOperand(2);
6595 ISD::CondCode CC = ISD::SETCC_INVALID;
6598 CC = cast<CondCodeSDNode>(Slct.getOperand(4))->get();
6600 SDValue CCOp = Slct.getOperand(0);
6601 if (CCOp.getOpcode() == ISD::SETCC)
6602 CC = cast<CondCodeSDNode>(CCOp.getOperand(2))->get();
6605 bool DoXform = false;
6607 assert ((Opc == ISD::ADD || (Opc == ISD::SUB && Slct == N->getOperand(1))) &&
6610 if (LHS.getOpcode() == ISD::Constant &&
6611 cast<ConstantSDNode>(LHS)->isNullValue()) {
6613 } else if (CC != ISD::SETCC_INVALID &&
6614 RHS.getOpcode() == ISD::Constant &&
6615 cast<ConstantSDNode>(RHS)->isNullValue()) {
6616 std::swap(LHS, RHS);
6617 SDValue Op0 = Slct.getOperand(0);
6618 EVT OpVT = isSlctCC ? Op0.getValueType() :
6619 Op0.getOperand(0).getValueType();
6620 bool isInt = OpVT.isInteger();
6621 CC = ISD::getSetCCInverse(CC, isInt);
6623 if (!TLI.isCondCodeLegal(CC, OpVT))
6624 return SDValue(); // Inverse operator isn't legal.
6631 SDValue Result = DAG.getNode(Opc, RHS.getDebugLoc(), VT, OtherOp, RHS);
6633 return DAG.getSelectCC(N->getDebugLoc(), OtherOp, Result,
6634 Slct.getOperand(0), Slct.getOperand(1), CC);
6635 SDValue CCOp = Slct.getOperand(0);
6637 CCOp = DAG.getSetCC(Slct.getDebugLoc(), CCOp.getValueType(),
6638 CCOp.getOperand(0), CCOp.getOperand(1), CC);
6639 return DAG.getNode(ISD::SELECT, N->getDebugLoc(), VT,
6640 CCOp, OtherOp, Result);
6645 // AddCombineToVPADDL- For pair-wise add on neon, use the vpaddl instruction
6646 // (only after legalization).
6647 static SDValue AddCombineToVPADDL(SDNode *N, SDValue N0, SDValue N1,
6648 TargetLowering::DAGCombinerInfo &DCI,
6649 const ARMSubtarget *Subtarget) {
6651 // Only perform optimization if after legalize, and if NEON is available. We
6652 // also expected both operands to be BUILD_VECTORs.
6653 if (DCI.isBeforeLegalize() || !Subtarget->hasNEON()
6654 || N0.getOpcode() != ISD::BUILD_VECTOR
6655 || N1.getOpcode() != ISD::BUILD_VECTOR)
6658 // Check output type since VPADDL operand elements can only be 8, 16, or 32.
6659 EVT VT = N->getValueType(0);
6660 if (!VT.isInteger() || VT.getVectorElementType() == MVT::i64)
6663 // Check that the vector operands are of the right form.
6664 // N0 and N1 are BUILD_VECTOR nodes with N number of EXTRACT_VECTOR
6665 // operands, where N is the size of the formed vector.
6666 // Each EXTRACT_VECTOR should have the same input vector and odd or even
6667 // index such that we have a pair wise add pattern.
6669 // Grab the vector that all EXTRACT_VECTOR nodes should be referencing.
6670 if (N0->getOperand(0)->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
6672 SDValue Vec = N0->getOperand(0)->getOperand(0);
6673 SDNode *V = Vec.getNode();
6674 unsigned nextIndex = 0;
6676 // For each operands to the ADD which are BUILD_VECTORs,
6677 // check to see if each of their operands are an EXTRACT_VECTOR with
6678 // the same vector and appropriate index.
6679 for (unsigned i = 0, e = N0->getNumOperands(); i != e; ++i) {
6680 if (N0->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT
6681 && N1->getOperand(i)->getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
6683 SDValue ExtVec0 = N0->getOperand(i);
6684 SDValue ExtVec1 = N1->getOperand(i);
6686 // First operand is the vector, verify its the same.
6687 if (V != ExtVec0->getOperand(0).getNode() ||
6688 V != ExtVec1->getOperand(0).getNode())
6691 // Second is the constant, verify its correct.
6692 ConstantSDNode *C0 = dyn_cast<ConstantSDNode>(ExtVec0->getOperand(1));
6693 ConstantSDNode *C1 = dyn_cast<ConstantSDNode>(ExtVec1->getOperand(1));
6695 // For the constant, we want to see all the even or all the odd.
6696 if (!C0 || !C1 || C0->getZExtValue() != nextIndex
6697 || C1->getZExtValue() != nextIndex+1)
6706 // Create VPADDL node.
6707 SelectionDAG &DAG = DCI.DAG;
6708 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
6710 // Build operand list.
6711 SmallVector<SDValue, 8> Ops;
6712 Ops.push_back(DAG.getConstant(Intrinsic::arm_neon_vpaddls,
6713 TLI.getPointerTy()));
6715 // Input is the vector.
6718 // Get widened type and narrowed type.
6720 unsigned numElem = VT.getVectorNumElements();
6721 switch (VT.getVectorElementType().getSimpleVT().SimpleTy) {
6722 case MVT::i8: widenType = MVT::getVectorVT(MVT::i16, numElem); break;
6723 case MVT::i16: widenType = MVT::getVectorVT(MVT::i32, numElem); break;
6724 case MVT::i32: widenType = MVT::getVectorVT(MVT::i64, numElem); break;
6726 llvm_unreachable("Invalid vector element type for padd optimization.");
6729 SDValue tmp = DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
6730 widenType, &Ops[0], Ops.size());
6731 return DAG.getNode(ISD::TRUNCATE, N->getDebugLoc(), VT, tmp);
6734 /// PerformADDCombineWithOperands - Try DAG combinations for an ADD with
6735 /// operands N0 and N1. This is a helper for PerformADDCombine that is
6736 /// called with the default operands, and if that fails, with commuted
6738 static SDValue PerformADDCombineWithOperands(SDNode *N, SDValue N0, SDValue N1,
6739 TargetLowering::DAGCombinerInfo &DCI,
6740 const ARMSubtarget *Subtarget){
6742 // Attempt to create vpaddl for this add.
6743 SDValue Result = AddCombineToVPADDL(N, N0, N1, DCI, Subtarget);
6744 if (Result.getNode())
6747 // fold (add (select cc, 0, c), x) -> (select cc, x, (add, x, c))
6748 if (N0.getOpcode() == ISD::SELECT && N0.getNode()->hasOneUse()) {
6749 SDValue Result = combineSelectAndUse(N, N0, N1, DCI);
6750 if (Result.getNode()) return Result;
6755 /// PerformADDCombine - Target-specific dag combine xforms for ISD::ADD.
6757 static SDValue PerformADDCombine(SDNode *N,
6758 TargetLowering::DAGCombinerInfo &DCI,
6759 const ARMSubtarget *Subtarget) {
6760 SDValue N0 = N->getOperand(0);
6761 SDValue N1 = N->getOperand(1);
6763 // First try with the default operand order.
6764 SDValue Result = PerformADDCombineWithOperands(N, N0, N1, DCI, Subtarget);
6765 if (Result.getNode())
6768 // If that didn't work, try again with the operands commuted.
6769 return PerformADDCombineWithOperands(N, N1, N0, DCI, Subtarget);
6772 /// PerformSUBCombine - Target-specific dag combine xforms for ISD::SUB.
6774 static SDValue PerformSUBCombine(SDNode *N,
6775 TargetLowering::DAGCombinerInfo &DCI) {
6776 SDValue N0 = N->getOperand(0);
6777 SDValue N1 = N->getOperand(1);
6779 // fold (sub x, (select cc, 0, c)) -> (select cc, x, (sub, x, c))
6780 if (N1.getOpcode() == ISD::SELECT && N1.getNode()->hasOneUse()) {
6781 SDValue Result = combineSelectAndUse(N, N1, N0, DCI);
6782 if (Result.getNode()) return Result;
6788 /// PerformVMULCombine
6789 /// Distribute (A + B) * C to (A * C) + (B * C) to take advantage of the
6790 /// special multiplier accumulator forwarding.
6796 static SDValue PerformVMULCombine(SDNode *N,
6797 TargetLowering::DAGCombinerInfo &DCI,
6798 const ARMSubtarget *Subtarget) {
6799 if (!Subtarget->hasVMLxForwarding())
6802 SelectionDAG &DAG = DCI.DAG;
6803 SDValue N0 = N->getOperand(0);
6804 SDValue N1 = N->getOperand(1);
6805 unsigned Opcode = N0.getOpcode();
6806 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
6807 Opcode != ISD::FADD && Opcode != ISD::FSUB) {
6808 Opcode = N1.getOpcode();
6809 if (Opcode != ISD::ADD && Opcode != ISD::SUB &&
6810 Opcode != ISD::FADD && Opcode != ISD::FSUB)
6815 EVT VT = N->getValueType(0);
6816 DebugLoc DL = N->getDebugLoc();
6817 SDValue N00 = N0->getOperand(0);
6818 SDValue N01 = N0->getOperand(1);
6819 return DAG.getNode(Opcode, DL, VT,
6820 DAG.getNode(ISD::MUL, DL, VT, N00, N1),
6821 DAG.getNode(ISD::MUL, DL, VT, N01, N1));
6824 static SDValue PerformMULCombine(SDNode *N,
6825 TargetLowering::DAGCombinerInfo &DCI,
6826 const ARMSubtarget *Subtarget) {
6827 SelectionDAG &DAG = DCI.DAG;
6829 if (Subtarget->isThumb1Only())
6832 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
6835 EVT VT = N->getValueType(0);
6836 if (VT.is64BitVector() || VT.is128BitVector())
6837 return PerformVMULCombine(N, DCI, Subtarget);
6841 ConstantSDNode *C = dyn_cast<ConstantSDNode>(N->getOperand(1));
6845 uint64_t MulAmt = C->getZExtValue();
6846 unsigned ShiftAmt = CountTrailingZeros_64(MulAmt);
6847 ShiftAmt = ShiftAmt & (32 - 1);
6848 SDValue V = N->getOperand(0);
6849 DebugLoc DL = N->getDebugLoc();
6852 MulAmt >>= ShiftAmt;
6853 if (isPowerOf2_32(MulAmt - 1)) {
6854 // (mul x, 2^N + 1) => (add (shl x, N), x)
6855 Res = DAG.getNode(ISD::ADD, DL, VT,
6856 V, DAG.getNode(ISD::SHL, DL, VT,
6857 V, DAG.getConstant(Log2_32(MulAmt-1),
6859 } else if (isPowerOf2_32(MulAmt + 1)) {
6860 // (mul x, 2^N - 1) => (sub (shl x, N), x)
6861 Res = DAG.getNode(ISD::SUB, DL, VT,
6862 DAG.getNode(ISD::SHL, DL, VT,
6863 V, DAG.getConstant(Log2_32(MulAmt+1),
6870 Res = DAG.getNode(ISD::SHL, DL, VT, Res,
6871 DAG.getConstant(ShiftAmt, MVT::i32));
6873 // Do not add new nodes to DAG combiner worklist.
6874 DCI.CombineTo(N, Res, false);
6878 static bool isCMOVWithZeroOrAllOnesLHS(SDValue N, bool AllOnes) {
6879 if (N.getOpcode() != ARMISD::CMOV || !N.getNode()->hasOneUse())
6882 SDValue FalseVal = N.getOperand(0);
6883 ConstantSDNode *C = dyn_cast<ConstantSDNode>(FalseVal);
6887 return C->isAllOnesValue();
6888 return C->isNullValue();
6891 /// formConditionalOp - Combine an operation with a conditional move operand
6892 /// to form a conditional op. e.g. (or x, (cmov 0, y, cond)) => (or.cond x, y)
6893 /// (and x, (cmov -1, y, cond)) => (and.cond, x, y)
6894 static SDValue formConditionalOp(SDNode *N, SelectionDAG &DAG,
6896 SDValue N0 = N->getOperand(0);
6897 SDValue N1 = N->getOperand(1);
6899 bool isAND = N->getOpcode() == ISD::AND;
6900 bool isCand = isCMOVWithZeroOrAllOnesLHS(N1, isAND);
6901 if (!isCand && Commutable) {
6902 isCand = isCMOVWithZeroOrAllOnesLHS(N0, isAND);
6910 switch (N->getOpcode()) {
6911 default: llvm_unreachable("Unexpected node");
6912 case ISD::AND: Opc = ARMISD::CAND; break;
6913 case ISD::OR: Opc = ARMISD::COR; break;
6914 case ISD::XOR: Opc = ARMISD::CXOR; break;
6916 return DAG.getNode(Opc, N->getDebugLoc(), N->getValueType(0), N0,
6917 N1.getOperand(1), N1.getOperand(2), N1.getOperand(3),
6921 static SDValue PerformANDCombine(SDNode *N,
6922 TargetLowering::DAGCombinerInfo &DCI,
6923 const ARMSubtarget *Subtarget) {
6925 // Attempt to use immediate-form VBIC
6926 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
6927 DebugLoc dl = N->getDebugLoc();
6928 EVT VT = N->getValueType(0);
6929 SelectionDAG &DAG = DCI.DAG;
6931 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
6934 APInt SplatBits, SplatUndef;
6935 unsigned SplatBitSize;
6938 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
6939 if (SplatBitSize <= 64) {
6941 SDValue Val = isNEONModifiedImm((~SplatBits).getZExtValue(),
6942 SplatUndef.getZExtValue(), SplatBitSize,
6943 DAG, VbicVT, VT.is128BitVector(),
6945 if (Val.getNode()) {
6947 DAG.getNode(ISD::BITCAST, dl, VbicVT, N->getOperand(0));
6948 SDValue Vbic = DAG.getNode(ARMISD::VBICIMM, dl, VbicVT, Input, Val);
6949 return DAG.getNode(ISD::BITCAST, dl, VT, Vbic);
6954 if (!Subtarget->isThumb1Only()) {
6955 // (and x, (cmov -1, y, cond)) => (and.cond x, y)
6956 SDValue CAND = formConditionalOp(N, DAG, true);
6964 /// PerformORCombine - Target-specific dag combine xforms for ISD::OR
6965 static SDValue PerformORCombine(SDNode *N,
6966 TargetLowering::DAGCombinerInfo &DCI,
6967 const ARMSubtarget *Subtarget) {
6968 // Attempt to use immediate-form VORR
6969 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(N->getOperand(1));
6970 DebugLoc dl = N->getDebugLoc();
6971 EVT VT = N->getValueType(0);
6972 SelectionDAG &DAG = DCI.DAG;
6974 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
6977 APInt SplatBits, SplatUndef;
6978 unsigned SplatBitSize;
6980 if (BVN && Subtarget->hasNEON() &&
6981 BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize, HasAnyUndefs)) {
6982 if (SplatBitSize <= 64) {
6984 SDValue Val = isNEONModifiedImm(SplatBits.getZExtValue(),
6985 SplatUndef.getZExtValue(), SplatBitSize,
6986 DAG, VorrVT, VT.is128BitVector(),
6988 if (Val.getNode()) {
6990 DAG.getNode(ISD::BITCAST, dl, VorrVT, N->getOperand(0));
6991 SDValue Vorr = DAG.getNode(ARMISD::VORRIMM, dl, VorrVT, Input, Val);
6992 return DAG.getNode(ISD::BITCAST, dl, VT, Vorr);
6997 if (!Subtarget->isThumb1Only()) {
6998 // (or x, (cmov 0, y, cond)) => (or.cond x, y)
6999 SDValue COR = formConditionalOp(N, DAG, true);
7004 SDValue N0 = N->getOperand(0);
7005 if (N0.getOpcode() != ISD::AND)
7007 SDValue N1 = N->getOperand(1);
7009 // (or (and B, A), (and C, ~A)) => (VBSL A, B, C) when A is a constant.
7010 if (Subtarget->hasNEON() && N1.getOpcode() == ISD::AND && VT.isVector() &&
7011 DAG.getTargetLoweringInfo().isTypeLegal(VT)) {
7013 unsigned SplatBitSize;
7016 BuildVectorSDNode *BVN0 = dyn_cast<BuildVectorSDNode>(N0->getOperand(1));
7018 if (BVN0 && BVN0->isConstantSplat(SplatBits0, SplatUndef, SplatBitSize,
7019 HasAnyUndefs) && !HasAnyUndefs) {
7020 BuildVectorSDNode *BVN1 = dyn_cast<BuildVectorSDNode>(N1->getOperand(1));
7022 if (BVN1 && BVN1->isConstantSplat(SplatBits1, SplatUndef, SplatBitSize,
7023 HasAnyUndefs) && !HasAnyUndefs &&
7024 SplatBits0 == ~SplatBits1) {
7025 // Canonicalize the vector type to make instruction selection simpler.
7026 EVT CanonicalVT = VT.is128BitVector() ? MVT::v4i32 : MVT::v2i32;
7027 SDValue Result = DAG.getNode(ARMISD::VBSL, dl, CanonicalVT,
7028 N0->getOperand(1), N0->getOperand(0),
7030 return DAG.getNode(ISD::BITCAST, dl, VT, Result);
7035 // Try to use the ARM/Thumb2 BFI (bitfield insert) instruction when
7038 // BFI is only available on V6T2+
7039 if (Subtarget->isThumb1Only() || !Subtarget->hasV6T2Ops())
7042 DebugLoc DL = N->getDebugLoc();
7043 // 1) or (and A, mask), val => ARMbfi A, val, mask
7044 // iff (val & mask) == val
7046 // 2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
7047 // 2a) iff isBitFieldInvertedMask(mask) && isBitFieldInvertedMask(~mask2)
7048 // && mask == ~mask2
7049 // 2b) iff isBitFieldInvertedMask(~mask) && isBitFieldInvertedMask(mask2)
7050 // && ~mask == mask2
7051 // (i.e., copy a bitfield value into another bitfield of the same width)
7056 SDValue N00 = N0.getOperand(0);
7058 // The value and the mask need to be constants so we can verify this is
7059 // actually a bitfield set. If the mask is 0xffff, we can do better
7060 // via a movt instruction, so don't use BFI in that case.
7061 SDValue MaskOp = N0.getOperand(1);
7062 ConstantSDNode *MaskC = dyn_cast<ConstantSDNode>(MaskOp);
7065 unsigned Mask = MaskC->getZExtValue();
7069 // Case (1): or (and A, mask), val => ARMbfi A, val, mask
7070 ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1);
7072 unsigned Val = N1C->getZExtValue();
7073 if ((Val & ~Mask) != Val)
7076 if (ARM::isBitFieldInvertedMask(Mask)) {
7077 Val >>= CountTrailingZeros_32(~Mask);
7079 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00,
7080 DAG.getConstant(Val, MVT::i32),
7081 DAG.getConstant(Mask, MVT::i32));
7083 // Do not add new nodes to DAG combiner worklist.
7084 DCI.CombineTo(N, Res, false);
7087 } else if (N1.getOpcode() == ISD::AND) {
7088 // case (2) or (and A, mask), (and B, mask2) => ARMbfi A, (lsr B, amt), mask
7089 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
7092 unsigned Mask2 = N11C->getZExtValue();
7094 // Mask and ~Mask2 (or reverse) must be equivalent for the BFI pattern
7096 if (ARM::isBitFieldInvertedMask(Mask) &&
7098 // The pack halfword instruction works better for masks that fit it,
7099 // so use that when it's available.
7100 if (Subtarget->hasT2ExtractPack() &&
7101 (Mask == 0xffff || Mask == 0xffff0000))
7104 unsigned amt = CountTrailingZeros_32(Mask2);
7105 Res = DAG.getNode(ISD::SRL, DL, VT, N1.getOperand(0),
7106 DAG.getConstant(amt, MVT::i32));
7107 Res = DAG.getNode(ARMISD::BFI, DL, VT, N00, Res,
7108 DAG.getConstant(Mask, MVT::i32));
7109 // Do not add new nodes to DAG combiner worklist.
7110 DCI.CombineTo(N, Res, false);
7112 } else if (ARM::isBitFieldInvertedMask(~Mask) &&
7114 // The pack halfword instruction works better for masks that fit it,
7115 // so use that when it's available.
7116 if (Subtarget->hasT2ExtractPack() &&
7117 (Mask2 == 0xffff || Mask2 == 0xffff0000))
7120 unsigned lsb = CountTrailingZeros_32(Mask);
7121 Res = DAG.getNode(ISD::SRL, DL, VT, N00,
7122 DAG.getConstant(lsb, MVT::i32));
7123 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1.getOperand(0), Res,
7124 DAG.getConstant(Mask2, MVT::i32));
7125 // Do not add new nodes to DAG combiner worklist.
7126 DCI.CombineTo(N, Res, false);
7131 if (DAG.MaskedValueIsZero(N1, MaskC->getAPIntValue()) &&
7132 N00.getOpcode() == ISD::SHL && isa<ConstantSDNode>(N00.getOperand(1)) &&
7133 ARM::isBitFieldInvertedMask(~Mask)) {
7134 // Case (3): or (and (shl A, #shamt), mask), B => ARMbfi B, A, ~mask
7135 // where lsb(mask) == #shamt and masked bits of B are known zero.
7136 SDValue ShAmt = N00.getOperand(1);
7137 unsigned ShAmtC = cast<ConstantSDNode>(ShAmt)->getZExtValue();
7138 unsigned LSB = CountTrailingZeros_32(Mask);
7142 Res = DAG.getNode(ARMISD::BFI, DL, VT, N1, N00.getOperand(0),
7143 DAG.getConstant(~Mask, MVT::i32));
7145 // Do not add new nodes to DAG combiner worklist.
7146 DCI.CombineTo(N, Res, false);
7152 static SDValue PerformXORCombine(SDNode *N,
7153 TargetLowering::DAGCombinerInfo &DCI,
7154 const ARMSubtarget *Subtarget) {
7155 EVT VT = N->getValueType(0);
7156 SelectionDAG &DAG = DCI.DAG;
7158 if(!DAG.getTargetLoweringInfo().isTypeLegal(VT))
7161 if (!Subtarget->isThumb1Only()) {
7162 // (xor x, (cmov 0, y, cond)) => (xor.cond x, y)
7163 SDValue CXOR = formConditionalOp(N, DAG, true);
7171 /// PerformBFICombine - (bfi A, (and B, Mask1), Mask2) -> (bfi A, B, Mask2) iff
7172 /// the bits being cleared by the AND are not demanded by the BFI.
7173 static SDValue PerformBFICombine(SDNode *N,
7174 TargetLowering::DAGCombinerInfo &DCI) {
7175 SDValue N1 = N->getOperand(1);
7176 if (N1.getOpcode() == ISD::AND) {
7177 ConstantSDNode *N11C = dyn_cast<ConstantSDNode>(N1.getOperand(1));
7180 unsigned InvMask = cast<ConstantSDNode>(N->getOperand(2))->getZExtValue();
7181 unsigned LSB = CountTrailingZeros_32(~InvMask);
7182 unsigned Width = (32 - CountLeadingZeros_32(~InvMask)) - LSB;
7183 unsigned Mask = (1 << Width)-1;
7184 unsigned Mask2 = N11C->getZExtValue();
7185 if ((Mask & (~Mask2)) == 0)
7186 return DCI.DAG.getNode(ARMISD::BFI, N->getDebugLoc(), N->getValueType(0),
7187 N->getOperand(0), N1.getOperand(0),
7193 /// PerformVMOVRRDCombine - Target-specific dag combine xforms for
7194 /// ARMISD::VMOVRRD.
7195 static SDValue PerformVMOVRRDCombine(SDNode *N,
7196 TargetLowering::DAGCombinerInfo &DCI) {
7197 // vmovrrd(vmovdrr x, y) -> x,y
7198 SDValue InDouble = N->getOperand(0);
7199 if (InDouble.getOpcode() == ARMISD::VMOVDRR)
7200 return DCI.CombineTo(N, InDouble.getOperand(0), InDouble.getOperand(1));
7202 // vmovrrd(load f64) -> (load i32), (load i32)
7203 SDNode *InNode = InDouble.getNode();
7204 if (ISD::isNormalLoad(InNode) && InNode->hasOneUse() &&
7205 InNode->getValueType(0) == MVT::f64 &&
7206 InNode->getOperand(1).getOpcode() == ISD::FrameIndex &&
7207 !cast<LoadSDNode>(InNode)->isVolatile()) {
7208 // TODO: Should this be done for non-FrameIndex operands?
7209 LoadSDNode *LD = cast<LoadSDNode>(InNode);
7211 SelectionDAG &DAG = DCI.DAG;
7212 DebugLoc DL = LD->getDebugLoc();
7213 SDValue BasePtr = LD->getBasePtr();
7214 SDValue NewLD1 = DAG.getLoad(MVT::i32, DL, LD->getChain(), BasePtr,
7215 LD->getPointerInfo(), LD->isVolatile(),
7216 LD->isNonTemporal(), LD->isInvariant(),
7217 LD->getAlignment());
7219 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
7220 DAG.getConstant(4, MVT::i32));
7221 SDValue NewLD2 = DAG.getLoad(MVT::i32, DL, NewLD1.getValue(1), OffsetPtr,
7222 LD->getPointerInfo(), LD->isVolatile(),
7223 LD->isNonTemporal(), LD->isInvariant(),
7224 std::min(4U, LD->getAlignment() / 2));
7226 DAG.ReplaceAllUsesOfValueWith(SDValue(LD, 1), NewLD2.getValue(1));
7227 SDValue Result = DCI.CombineTo(N, NewLD1, NewLD2);
7228 DCI.RemoveFromWorklist(LD);
7236 /// PerformVMOVDRRCombine - Target-specific dag combine xforms for
7237 /// ARMISD::VMOVDRR. This is also used for BUILD_VECTORs with 2 operands.
7238 static SDValue PerformVMOVDRRCombine(SDNode *N, SelectionDAG &DAG) {
7239 // N=vmovrrd(X); vmovdrr(N:0, N:1) -> bit_convert(X)
7240 SDValue Op0 = N->getOperand(0);
7241 SDValue Op1 = N->getOperand(1);
7242 if (Op0.getOpcode() == ISD::BITCAST)
7243 Op0 = Op0.getOperand(0);
7244 if (Op1.getOpcode() == ISD::BITCAST)
7245 Op1 = Op1.getOperand(0);
7246 if (Op0.getOpcode() == ARMISD::VMOVRRD &&
7247 Op0.getNode() == Op1.getNode() &&
7248 Op0.getResNo() == 0 && Op1.getResNo() == 1)
7249 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(),
7250 N->getValueType(0), Op0.getOperand(0));
7254 /// PerformSTORECombine - Target-specific dag combine xforms for
7256 static SDValue PerformSTORECombine(SDNode *N,
7257 TargetLowering::DAGCombinerInfo &DCI) {
7258 // Bitcast an i64 store extracted from a vector to f64.
7259 // Otherwise, the i64 value will be legalized to a pair of i32 values.
7260 StoreSDNode *St = cast<StoreSDNode>(N);
7261 SDValue StVal = St->getValue();
7262 if (!ISD::isNormalStore(St) || St->isVolatile())
7265 if (StVal.getNode()->getOpcode() == ARMISD::VMOVDRR &&
7266 StVal.getNode()->hasOneUse() && !St->isVolatile()) {
7267 SelectionDAG &DAG = DCI.DAG;
7268 DebugLoc DL = St->getDebugLoc();
7269 SDValue BasePtr = St->getBasePtr();
7270 SDValue NewST1 = DAG.getStore(St->getChain(), DL,
7271 StVal.getNode()->getOperand(0), BasePtr,
7272 St->getPointerInfo(), St->isVolatile(),
7273 St->isNonTemporal(), St->getAlignment());
7275 SDValue OffsetPtr = DAG.getNode(ISD::ADD, DL, MVT::i32, BasePtr,
7276 DAG.getConstant(4, MVT::i32));
7277 return DAG.getStore(NewST1.getValue(0), DL, StVal.getNode()->getOperand(1),
7278 OffsetPtr, St->getPointerInfo(), St->isVolatile(),
7279 St->isNonTemporal(),
7280 std::min(4U, St->getAlignment() / 2));
7283 if (StVal.getValueType() != MVT::i64 ||
7284 StVal.getNode()->getOpcode() != ISD::EXTRACT_VECTOR_ELT)
7287 SelectionDAG &DAG = DCI.DAG;
7288 DebugLoc dl = StVal.getDebugLoc();
7289 SDValue IntVec = StVal.getOperand(0);
7290 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
7291 IntVec.getValueType().getVectorNumElements());
7292 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, IntVec);
7293 SDValue ExtElt = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::f64,
7294 Vec, StVal.getOperand(1));
7295 dl = N->getDebugLoc();
7296 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::i64, ExtElt);
7297 // Make the DAGCombiner fold the bitcasts.
7298 DCI.AddToWorklist(Vec.getNode());
7299 DCI.AddToWorklist(ExtElt.getNode());
7300 DCI.AddToWorklist(V.getNode());
7301 return DAG.getStore(St->getChain(), dl, V, St->getBasePtr(),
7302 St->getPointerInfo(), St->isVolatile(),
7303 St->isNonTemporal(), St->getAlignment(),
7307 /// hasNormalLoadOperand - Check if any of the operands of a BUILD_VECTOR node
7308 /// are normal, non-volatile loads. If so, it is profitable to bitcast an
7309 /// i64 vector to have f64 elements, since the value can then be loaded
7310 /// directly into a VFP register.
7311 static bool hasNormalLoadOperand(SDNode *N) {
7312 unsigned NumElts = N->getValueType(0).getVectorNumElements();
7313 for (unsigned i = 0; i < NumElts; ++i) {
7314 SDNode *Elt = N->getOperand(i).getNode();
7315 if (ISD::isNormalLoad(Elt) && !cast<LoadSDNode>(Elt)->isVolatile())
7321 /// PerformBUILD_VECTORCombine - Target-specific dag combine xforms for
7322 /// ISD::BUILD_VECTOR.
7323 static SDValue PerformBUILD_VECTORCombine(SDNode *N,
7324 TargetLowering::DAGCombinerInfo &DCI){
7325 // build_vector(N=ARMISD::VMOVRRD(X), N:1) -> bit_convert(X):
7326 // VMOVRRD is introduced when legalizing i64 types. It forces the i64 value
7327 // into a pair of GPRs, which is fine when the value is used as a scalar,
7328 // but if the i64 value is converted to a vector, we need to undo the VMOVRRD.
7329 SelectionDAG &DAG = DCI.DAG;
7330 if (N->getNumOperands() == 2) {
7331 SDValue RV = PerformVMOVDRRCombine(N, DAG);
7336 // Load i64 elements as f64 values so that type legalization does not split
7337 // them up into i32 values.
7338 EVT VT = N->getValueType(0);
7339 if (VT.getVectorElementType() != MVT::i64 || !hasNormalLoadOperand(N))
7341 DebugLoc dl = N->getDebugLoc();
7342 SmallVector<SDValue, 8> Ops;
7343 unsigned NumElts = VT.getVectorNumElements();
7344 for (unsigned i = 0; i < NumElts; ++i) {
7345 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(i));
7347 // Make the DAGCombiner fold the bitcast.
7348 DCI.AddToWorklist(V.getNode());
7350 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64, NumElts);
7351 SDValue BV = DAG.getNode(ISD::BUILD_VECTOR, dl, FloatVT, Ops.data(), NumElts);
7352 return DAG.getNode(ISD::BITCAST, dl, VT, BV);
7355 /// PerformInsertEltCombine - Target-specific dag combine xforms for
7356 /// ISD::INSERT_VECTOR_ELT.
7357 static SDValue PerformInsertEltCombine(SDNode *N,
7358 TargetLowering::DAGCombinerInfo &DCI) {
7359 // Bitcast an i64 load inserted into a vector to f64.
7360 // Otherwise, the i64 value will be legalized to a pair of i32 values.
7361 EVT VT = N->getValueType(0);
7362 SDNode *Elt = N->getOperand(1).getNode();
7363 if (VT.getVectorElementType() != MVT::i64 ||
7364 !ISD::isNormalLoad(Elt) || cast<LoadSDNode>(Elt)->isVolatile())
7367 SelectionDAG &DAG = DCI.DAG;
7368 DebugLoc dl = N->getDebugLoc();
7369 EVT FloatVT = EVT::getVectorVT(*DAG.getContext(), MVT::f64,
7370 VT.getVectorNumElements());
7371 SDValue Vec = DAG.getNode(ISD::BITCAST, dl, FloatVT, N->getOperand(0));
7372 SDValue V = DAG.getNode(ISD::BITCAST, dl, MVT::f64, N->getOperand(1));
7373 // Make the DAGCombiner fold the bitcasts.
7374 DCI.AddToWorklist(Vec.getNode());
7375 DCI.AddToWorklist(V.getNode());
7376 SDValue InsElt = DAG.getNode(ISD::INSERT_VECTOR_ELT, dl, FloatVT,
7377 Vec, V, N->getOperand(2));
7378 return DAG.getNode(ISD::BITCAST, dl, VT, InsElt);
7381 /// PerformVECTOR_SHUFFLECombine - Target-specific dag combine xforms for
7382 /// ISD::VECTOR_SHUFFLE.
7383 static SDValue PerformVECTOR_SHUFFLECombine(SDNode *N, SelectionDAG &DAG) {
7384 // The LLVM shufflevector instruction does not require the shuffle mask
7385 // length to match the operand vector length, but ISD::VECTOR_SHUFFLE does
7386 // have that requirement. When translating to ISD::VECTOR_SHUFFLE, if the
7387 // operands do not match the mask length, they are extended by concatenating
7388 // them with undef vectors. That is probably the right thing for other
7389 // targets, but for NEON it is better to concatenate two double-register
7390 // size vector operands into a single quad-register size vector. Do that
7391 // transformation here:
7392 // shuffle(concat(v1, undef), concat(v2, undef)) ->
7393 // shuffle(concat(v1, v2), undef)
7394 SDValue Op0 = N->getOperand(0);
7395 SDValue Op1 = N->getOperand(1);
7396 if (Op0.getOpcode() != ISD::CONCAT_VECTORS ||
7397 Op1.getOpcode() != ISD::CONCAT_VECTORS ||
7398 Op0.getNumOperands() != 2 ||
7399 Op1.getNumOperands() != 2)
7401 SDValue Concat0Op1 = Op0.getOperand(1);
7402 SDValue Concat1Op1 = Op1.getOperand(1);
7403 if (Concat0Op1.getOpcode() != ISD::UNDEF ||
7404 Concat1Op1.getOpcode() != ISD::UNDEF)
7406 // Skip the transformation if any of the types are illegal.
7407 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
7408 EVT VT = N->getValueType(0);
7409 if (!TLI.isTypeLegal(VT) ||
7410 !TLI.isTypeLegal(Concat0Op1.getValueType()) ||
7411 !TLI.isTypeLegal(Concat1Op1.getValueType()))
7414 SDValue NewConcat = DAG.getNode(ISD::CONCAT_VECTORS, N->getDebugLoc(), VT,
7415 Op0.getOperand(0), Op1.getOperand(0));
7416 // Translate the shuffle mask.
7417 SmallVector<int, 16> NewMask;
7418 unsigned NumElts = VT.getVectorNumElements();
7419 unsigned HalfElts = NumElts/2;
7420 ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(N);
7421 for (unsigned n = 0; n < NumElts; ++n) {
7422 int MaskElt = SVN->getMaskElt(n);
7424 if (MaskElt < (int)HalfElts)
7426 else if (MaskElt >= (int)NumElts && MaskElt < (int)(NumElts + HalfElts))
7427 NewElt = HalfElts + MaskElt - NumElts;
7428 NewMask.push_back(NewElt);
7430 return DAG.getVectorShuffle(VT, N->getDebugLoc(), NewConcat,
7431 DAG.getUNDEF(VT), NewMask.data());
7434 /// CombineBaseUpdate - Target-specific DAG combine function for VLDDUP and
7435 /// NEON load/store intrinsics to merge base address updates.
7436 static SDValue CombineBaseUpdate(SDNode *N,
7437 TargetLowering::DAGCombinerInfo &DCI) {
7438 if (DCI.isBeforeLegalize() || DCI.isCalledByLegalizer())
7441 SelectionDAG &DAG = DCI.DAG;
7442 bool isIntrinsic = (N->getOpcode() == ISD::INTRINSIC_VOID ||
7443 N->getOpcode() == ISD::INTRINSIC_W_CHAIN);
7444 unsigned AddrOpIdx = (isIntrinsic ? 2 : 1);
7445 SDValue Addr = N->getOperand(AddrOpIdx);
7447 // Search for a use of the address operand that is an increment.
7448 for (SDNode::use_iterator UI = Addr.getNode()->use_begin(),
7449 UE = Addr.getNode()->use_end(); UI != UE; ++UI) {
7451 if (User->getOpcode() != ISD::ADD ||
7452 UI.getUse().getResNo() != Addr.getResNo())
7455 // Check that the add is independent of the load/store. Otherwise, folding
7456 // it would create a cycle.
7457 if (User->isPredecessorOf(N) || N->isPredecessorOf(User))
7460 // Find the new opcode for the updating load/store.
7462 bool isLaneOp = false;
7463 unsigned NewOpc = 0;
7464 unsigned NumVecs = 0;
7466 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
7468 default: llvm_unreachable("unexpected intrinsic for Neon base update");
7469 case Intrinsic::arm_neon_vld1: NewOpc = ARMISD::VLD1_UPD;
7471 case Intrinsic::arm_neon_vld2: NewOpc = ARMISD::VLD2_UPD;
7473 case Intrinsic::arm_neon_vld3: NewOpc = ARMISD::VLD3_UPD;
7475 case Intrinsic::arm_neon_vld4: NewOpc = ARMISD::VLD4_UPD;
7477 case Intrinsic::arm_neon_vld2lane: NewOpc = ARMISD::VLD2LN_UPD;
7478 NumVecs = 2; isLaneOp = true; break;
7479 case Intrinsic::arm_neon_vld3lane: NewOpc = ARMISD::VLD3LN_UPD;
7480 NumVecs = 3; isLaneOp = true; break;
7481 case Intrinsic::arm_neon_vld4lane: NewOpc = ARMISD::VLD4LN_UPD;
7482 NumVecs = 4; isLaneOp = true; break;
7483 case Intrinsic::arm_neon_vst1: NewOpc = ARMISD::VST1_UPD;
7484 NumVecs = 1; isLoad = false; break;
7485 case Intrinsic::arm_neon_vst2: NewOpc = ARMISD::VST2_UPD;
7486 NumVecs = 2; isLoad = false; break;
7487 case Intrinsic::arm_neon_vst3: NewOpc = ARMISD::VST3_UPD;
7488 NumVecs = 3; isLoad = false; break;
7489 case Intrinsic::arm_neon_vst4: NewOpc = ARMISD::VST4_UPD;
7490 NumVecs = 4; isLoad = false; break;
7491 case Intrinsic::arm_neon_vst2lane: NewOpc = ARMISD::VST2LN_UPD;
7492 NumVecs = 2; isLoad = false; isLaneOp = true; break;
7493 case Intrinsic::arm_neon_vst3lane: NewOpc = ARMISD::VST3LN_UPD;
7494 NumVecs = 3; isLoad = false; isLaneOp = true; break;
7495 case Intrinsic::arm_neon_vst4lane: NewOpc = ARMISD::VST4LN_UPD;
7496 NumVecs = 4; isLoad = false; isLaneOp = true; break;
7500 switch (N->getOpcode()) {
7501 default: llvm_unreachable("unexpected opcode for Neon base update");
7502 case ARMISD::VLD2DUP: NewOpc = ARMISD::VLD2DUP_UPD; NumVecs = 2; break;
7503 case ARMISD::VLD3DUP: NewOpc = ARMISD::VLD3DUP_UPD; NumVecs = 3; break;
7504 case ARMISD::VLD4DUP: NewOpc = ARMISD::VLD4DUP_UPD; NumVecs = 4; break;
7508 // Find the size of memory referenced by the load/store.
7511 VecTy = N->getValueType(0);
7513 VecTy = N->getOperand(AddrOpIdx+1).getValueType();
7514 unsigned NumBytes = NumVecs * VecTy.getSizeInBits() / 8;
7516 NumBytes /= VecTy.getVectorNumElements();
7518 // If the increment is a constant, it must match the memory ref size.
7519 SDValue Inc = User->getOperand(User->getOperand(0) == Addr ? 1 : 0);
7520 if (ConstantSDNode *CInc = dyn_cast<ConstantSDNode>(Inc.getNode())) {
7521 uint64_t IncVal = CInc->getZExtValue();
7522 if (IncVal != NumBytes)
7524 } else if (NumBytes >= 3 * 16) {
7525 // VLD3/4 and VST3/4 for 128-bit vectors are implemented with two
7526 // separate instructions that make it harder to use a non-constant update.
7530 // Create the new updating load/store node.
7532 unsigned NumResultVecs = (isLoad ? NumVecs : 0);
7534 for (n = 0; n < NumResultVecs; ++n)
7536 Tys[n++] = MVT::i32;
7537 Tys[n] = MVT::Other;
7538 SDVTList SDTys = DAG.getVTList(Tys, NumResultVecs+2);
7539 SmallVector<SDValue, 8> Ops;
7540 Ops.push_back(N->getOperand(0)); // incoming chain
7541 Ops.push_back(N->getOperand(AddrOpIdx));
7543 for (unsigned i = AddrOpIdx + 1; i < N->getNumOperands(); ++i) {
7544 Ops.push_back(N->getOperand(i));
7546 MemIntrinsicSDNode *MemInt = cast<MemIntrinsicSDNode>(N);
7547 SDValue UpdN = DAG.getMemIntrinsicNode(NewOpc, N->getDebugLoc(), SDTys,
7548 Ops.data(), Ops.size(),
7549 MemInt->getMemoryVT(),
7550 MemInt->getMemOperand());
7553 std::vector<SDValue> NewResults;
7554 for (unsigned i = 0; i < NumResultVecs; ++i) {
7555 NewResults.push_back(SDValue(UpdN.getNode(), i));
7557 NewResults.push_back(SDValue(UpdN.getNode(), NumResultVecs+1)); // chain
7558 DCI.CombineTo(N, NewResults);
7559 DCI.CombineTo(User, SDValue(UpdN.getNode(), NumResultVecs));
7566 /// CombineVLDDUP - For a VDUPLANE node N, check if its source operand is a
7567 /// vldN-lane (N > 1) intrinsic, and if all the other uses of that intrinsic
7568 /// are also VDUPLANEs. If so, combine them to a vldN-dup operation and
7570 static bool CombineVLDDUP(SDNode *N, TargetLowering::DAGCombinerInfo &DCI) {
7571 SelectionDAG &DAG = DCI.DAG;
7572 EVT VT = N->getValueType(0);
7573 // vldN-dup instructions only support 64-bit vectors for N > 1.
7574 if (!VT.is64BitVector())
7577 // Check if the VDUPLANE operand is a vldN-dup intrinsic.
7578 SDNode *VLD = N->getOperand(0).getNode();
7579 if (VLD->getOpcode() != ISD::INTRINSIC_W_CHAIN)
7581 unsigned NumVecs = 0;
7582 unsigned NewOpc = 0;
7583 unsigned IntNo = cast<ConstantSDNode>(VLD->getOperand(1))->getZExtValue();
7584 if (IntNo == Intrinsic::arm_neon_vld2lane) {
7586 NewOpc = ARMISD::VLD2DUP;
7587 } else if (IntNo == Intrinsic::arm_neon_vld3lane) {
7589 NewOpc = ARMISD::VLD3DUP;
7590 } else if (IntNo == Intrinsic::arm_neon_vld4lane) {
7592 NewOpc = ARMISD::VLD4DUP;
7597 // First check that all the vldN-lane uses are VDUPLANEs and that the lane
7598 // numbers match the load.
7599 unsigned VLDLaneNo =
7600 cast<ConstantSDNode>(VLD->getOperand(NumVecs+3))->getZExtValue();
7601 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
7603 // Ignore uses of the chain result.
7604 if (UI.getUse().getResNo() == NumVecs)
7607 if (User->getOpcode() != ARMISD::VDUPLANE ||
7608 VLDLaneNo != cast<ConstantSDNode>(User->getOperand(1))->getZExtValue())
7612 // Create the vldN-dup node.
7615 for (n = 0; n < NumVecs; ++n)
7617 Tys[n] = MVT::Other;
7618 SDVTList SDTys = DAG.getVTList(Tys, NumVecs+1);
7619 SDValue Ops[] = { VLD->getOperand(0), VLD->getOperand(2) };
7620 MemIntrinsicSDNode *VLDMemInt = cast<MemIntrinsicSDNode>(VLD);
7621 SDValue VLDDup = DAG.getMemIntrinsicNode(NewOpc, VLD->getDebugLoc(), SDTys,
7622 Ops, 2, VLDMemInt->getMemoryVT(),
7623 VLDMemInt->getMemOperand());
7626 for (SDNode::use_iterator UI = VLD->use_begin(), UE = VLD->use_end();
7628 unsigned ResNo = UI.getUse().getResNo();
7629 // Ignore uses of the chain result.
7630 if (ResNo == NumVecs)
7633 DCI.CombineTo(User, SDValue(VLDDup.getNode(), ResNo));
7636 // Now the vldN-lane intrinsic is dead except for its chain result.
7637 // Update uses of the chain.
7638 std::vector<SDValue> VLDDupResults;
7639 for (unsigned n = 0; n < NumVecs; ++n)
7640 VLDDupResults.push_back(SDValue(VLDDup.getNode(), n));
7641 VLDDupResults.push_back(SDValue(VLDDup.getNode(), NumVecs));
7642 DCI.CombineTo(VLD, VLDDupResults);
7647 /// PerformVDUPLANECombine - Target-specific dag combine xforms for
7648 /// ARMISD::VDUPLANE.
7649 static SDValue PerformVDUPLANECombine(SDNode *N,
7650 TargetLowering::DAGCombinerInfo &DCI) {
7651 SDValue Op = N->getOperand(0);
7653 // If the source is a vldN-lane (N > 1) intrinsic, and all the other uses
7654 // of that intrinsic are also VDUPLANEs, combine them to a vldN-dup operation.
7655 if (CombineVLDDUP(N, DCI))
7656 return SDValue(N, 0);
7658 // If the source is already a VMOVIMM or VMVNIMM splat, the VDUPLANE is
7659 // redundant. Ignore bit_converts for now; element sizes are checked below.
7660 while (Op.getOpcode() == ISD::BITCAST)
7661 Op = Op.getOperand(0);
7662 if (Op.getOpcode() != ARMISD::VMOVIMM && Op.getOpcode() != ARMISD::VMVNIMM)
7665 // Make sure the VMOV element size is not bigger than the VDUPLANE elements.
7666 unsigned EltSize = Op.getValueType().getVectorElementType().getSizeInBits();
7667 // The canonical VMOV for a zero vector uses a 32-bit element size.
7668 unsigned Imm = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
7670 if (ARM_AM::decodeNEONModImm(Imm, EltBits) == 0)
7672 EVT VT = N->getValueType(0);
7673 if (EltSize > VT.getVectorElementType().getSizeInBits())
7676 return DCI.DAG.getNode(ISD::BITCAST, N->getDebugLoc(), VT, Op);
7679 // isConstVecPow2 - Return true if each vector element is a power of 2, all
7680 // elements are the same constant, C, and Log2(C) ranges from 1 to 32.
7681 static bool isConstVecPow2(SDValue ConstVec, bool isSigned, uint64_t &C)
7685 for (unsigned I = 0, E = ConstVec.getValueType().getVectorNumElements();
7687 ConstantFPSDNode *C = dyn_cast<ConstantFPSDNode>(ConstVec.getOperand(I));
7692 APFloat APF = C->getValueAPF();
7693 if (APF.convertToInteger(&cN, 64, isSigned, APFloat::rmTowardZero, &isExact)
7694 != APFloat::opOK || !isExact)
7697 c0 = (I == 0) ? cN : c0;
7698 if (!isPowerOf2_64(cN) || c0 != cN || Log2_64(c0) < 1 || Log2_64(c0) > 32)
7705 /// PerformVCVTCombine - VCVT (floating-point to fixed-point, Advanced SIMD)
7706 /// can replace combinations of VMUL and VCVT (floating-point to integer)
7707 /// when the VMUL has a constant operand that is a power of 2.
7709 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
7710 /// vmul.f32 d16, d17, d16
7711 /// vcvt.s32.f32 d16, d16
7713 /// vcvt.s32.f32 d16, d16, #3
7714 static SDValue PerformVCVTCombine(SDNode *N,
7715 TargetLowering::DAGCombinerInfo &DCI,
7716 const ARMSubtarget *Subtarget) {
7717 SelectionDAG &DAG = DCI.DAG;
7718 SDValue Op = N->getOperand(0);
7720 if (!Subtarget->hasNEON() || !Op.getValueType().isVector() ||
7721 Op.getOpcode() != ISD::FMUL)
7725 SDValue N0 = Op->getOperand(0);
7726 SDValue ConstVec = Op->getOperand(1);
7727 bool isSigned = N->getOpcode() == ISD::FP_TO_SINT;
7729 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
7730 !isConstVecPow2(ConstVec, isSigned, C))
7733 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfp2fxs :
7734 Intrinsic::arm_neon_vcvtfp2fxu;
7735 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
7737 DAG.getConstant(IntrinsicOpcode, MVT::i32), N0,
7738 DAG.getConstant(Log2_64(C), MVT::i32));
7741 /// PerformVDIVCombine - VCVT (fixed-point to floating-point, Advanced SIMD)
7742 /// can replace combinations of VCVT (integer to floating-point) and VDIV
7743 /// when the VDIV has a constant operand that is a power of 2.
7745 /// Example (assume d17 = <float 8.000000e+00, float 8.000000e+00>):
7746 /// vcvt.f32.s32 d16, d16
7747 /// vdiv.f32 d16, d17, d16
7749 /// vcvt.f32.s32 d16, d16, #3
7750 static SDValue PerformVDIVCombine(SDNode *N,
7751 TargetLowering::DAGCombinerInfo &DCI,
7752 const ARMSubtarget *Subtarget) {
7753 SelectionDAG &DAG = DCI.DAG;
7754 SDValue Op = N->getOperand(0);
7755 unsigned OpOpcode = Op.getNode()->getOpcode();
7757 if (!Subtarget->hasNEON() || !N->getValueType(0).isVector() ||
7758 (OpOpcode != ISD::SINT_TO_FP && OpOpcode != ISD::UINT_TO_FP))
7762 SDValue ConstVec = N->getOperand(1);
7763 bool isSigned = OpOpcode == ISD::SINT_TO_FP;
7765 if (ConstVec.getOpcode() != ISD::BUILD_VECTOR ||
7766 !isConstVecPow2(ConstVec, isSigned, C))
7769 unsigned IntrinsicOpcode = isSigned ? Intrinsic::arm_neon_vcvtfxs2fp :
7770 Intrinsic::arm_neon_vcvtfxu2fp;
7771 return DAG.getNode(ISD::INTRINSIC_WO_CHAIN, N->getDebugLoc(),
7773 DAG.getConstant(IntrinsicOpcode, MVT::i32),
7774 Op.getOperand(0), DAG.getConstant(Log2_64(C), MVT::i32));
7777 /// Getvshiftimm - Check if this is a valid build_vector for the immediate
7778 /// operand of a vector shift operation, where all the elements of the
7779 /// build_vector must have the same constant integer value.
7780 static bool getVShiftImm(SDValue Op, unsigned ElementBits, int64_t &Cnt) {
7781 // Ignore bit_converts.
7782 while (Op.getOpcode() == ISD::BITCAST)
7783 Op = Op.getOperand(0);
7784 BuildVectorSDNode *BVN = dyn_cast<BuildVectorSDNode>(Op.getNode());
7785 APInt SplatBits, SplatUndef;
7786 unsigned SplatBitSize;
7788 if (! BVN || ! BVN->isConstantSplat(SplatBits, SplatUndef, SplatBitSize,
7789 HasAnyUndefs, ElementBits) ||
7790 SplatBitSize > ElementBits)
7792 Cnt = SplatBits.getSExtValue();
7796 /// isVShiftLImm - Check if this is a valid build_vector for the immediate
7797 /// operand of a vector shift left operation. That value must be in the range:
7798 /// 0 <= Value < ElementBits for a left shift; or
7799 /// 0 <= Value <= ElementBits for a long left shift.
7800 static bool isVShiftLImm(SDValue Op, EVT VT, bool isLong, int64_t &Cnt) {
7801 assert(VT.isVector() && "vector shift count is not a vector type");
7802 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
7803 if (! getVShiftImm(Op, ElementBits, Cnt))
7805 return (Cnt >= 0 && (isLong ? Cnt-1 : Cnt) < ElementBits);
7808 /// isVShiftRImm - Check if this is a valid build_vector for the immediate
7809 /// operand of a vector shift right operation. For a shift opcode, the value
7810 /// is positive, but for an intrinsic the value count must be negative. The
7811 /// absolute value must be in the range:
7812 /// 1 <= |Value| <= ElementBits for a right shift; or
7813 /// 1 <= |Value| <= ElementBits/2 for a narrow right shift.
7814 static bool isVShiftRImm(SDValue Op, EVT VT, bool isNarrow, bool isIntrinsic,
7816 assert(VT.isVector() && "vector shift count is not a vector type");
7817 unsigned ElementBits = VT.getVectorElementType().getSizeInBits();
7818 if (! getVShiftImm(Op, ElementBits, Cnt))
7822 return (Cnt >= 1 && Cnt <= (isNarrow ? ElementBits/2 : ElementBits));
7825 /// PerformIntrinsicCombine - ARM-specific DAG combining for intrinsics.
7826 static SDValue PerformIntrinsicCombine(SDNode *N, SelectionDAG &DAG) {
7827 unsigned IntNo = cast<ConstantSDNode>(N->getOperand(0))->getZExtValue();
7830 // Don't do anything for most intrinsics.
7833 // Vector shifts: check for immediate versions and lower them.
7834 // Note: This is done during DAG combining instead of DAG legalizing because
7835 // the build_vectors for 64-bit vector element shift counts are generally
7836 // not legal, and it is hard to see their values after they get legalized to
7837 // loads from a constant pool.
7838 case Intrinsic::arm_neon_vshifts:
7839 case Intrinsic::arm_neon_vshiftu:
7840 case Intrinsic::arm_neon_vshiftls:
7841 case Intrinsic::arm_neon_vshiftlu:
7842 case Intrinsic::arm_neon_vshiftn:
7843 case Intrinsic::arm_neon_vrshifts:
7844 case Intrinsic::arm_neon_vrshiftu:
7845 case Intrinsic::arm_neon_vrshiftn:
7846 case Intrinsic::arm_neon_vqshifts:
7847 case Intrinsic::arm_neon_vqshiftu:
7848 case Intrinsic::arm_neon_vqshiftsu:
7849 case Intrinsic::arm_neon_vqshiftns:
7850 case Intrinsic::arm_neon_vqshiftnu:
7851 case Intrinsic::arm_neon_vqshiftnsu:
7852 case Intrinsic::arm_neon_vqrshiftns:
7853 case Intrinsic::arm_neon_vqrshiftnu:
7854 case Intrinsic::arm_neon_vqrshiftnsu: {
7855 EVT VT = N->getOperand(1).getValueType();
7857 unsigned VShiftOpc = 0;
7860 case Intrinsic::arm_neon_vshifts:
7861 case Intrinsic::arm_neon_vshiftu:
7862 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt)) {
7863 VShiftOpc = ARMISD::VSHL;
7866 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt)) {
7867 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshifts ?
7868 ARMISD::VSHRs : ARMISD::VSHRu);
7873 case Intrinsic::arm_neon_vshiftls:
7874 case Intrinsic::arm_neon_vshiftlu:
7875 if (isVShiftLImm(N->getOperand(2), VT, true, Cnt))
7877 llvm_unreachable("invalid shift count for vshll intrinsic");
7879 case Intrinsic::arm_neon_vrshifts:
7880 case Intrinsic::arm_neon_vrshiftu:
7881 if (isVShiftRImm(N->getOperand(2), VT, false, true, Cnt))
7885 case Intrinsic::arm_neon_vqshifts:
7886 case Intrinsic::arm_neon_vqshiftu:
7887 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
7891 case Intrinsic::arm_neon_vqshiftsu:
7892 if (isVShiftLImm(N->getOperand(2), VT, false, Cnt))
7894 llvm_unreachable("invalid shift count for vqshlu intrinsic");
7896 case Intrinsic::arm_neon_vshiftn:
7897 case Intrinsic::arm_neon_vrshiftn:
7898 case Intrinsic::arm_neon_vqshiftns:
7899 case Intrinsic::arm_neon_vqshiftnu:
7900 case Intrinsic::arm_neon_vqshiftnsu:
7901 case Intrinsic::arm_neon_vqrshiftns:
7902 case Intrinsic::arm_neon_vqrshiftnu:
7903 case Intrinsic::arm_neon_vqrshiftnsu:
7904 // Narrowing shifts require an immediate right shift.
7905 if (isVShiftRImm(N->getOperand(2), VT, true, true, Cnt))
7907 llvm_unreachable("invalid shift count for narrowing vector shift "
7911 llvm_unreachable("unhandled vector shift");
7915 case Intrinsic::arm_neon_vshifts:
7916 case Intrinsic::arm_neon_vshiftu:
7917 // Opcode already set above.
7919 case Intrinsic::arm_neon_vshiftls:
7920 case Intrinsic::arm_neon_vshiftlu:
7921 if (Cnt == VT.getVectorElementType().getSizeInBits())
7922 VShiftOpc = ARMISD::VSHLLi;
7924 VShiftOpc = (IntNo == Intrinsic::arm_neon_vshiftls ?
7925 ARMISD::VSHLLs : ARMISD::VSHLLu);
7927 case Intrinsic::arm_neon_vshiftn:
7928 VShiftOpc = ARMISD::VSHRN; break;
7929 case Intrinsic::arm_neon_vrshifts:
7930 VShiftOpc = ARMISD::VRSHRs; break;
7931 case Intrinsic::arm_neon_vrshiftu:
7932 VShiftOpc = ARMISD::VRSHRu; break;
7933 case Intrinsic::arm_neon_vrshiftn:
7934 VShiftOpc = ARMISD::VRSHRN; break;
7935 case Intrinsic::arm_neon_vqshifts:
7936 VShiftOpc = ARMISD::VQSHLs; break;
7937 case Intrinsic::arm_neon_vqshiftu:
7938 VShiftOpc = ARMISD::VQSHLu; break;
7939 case Intrinsic::arm_neon_vqshiftsu:
7940 VShiftOpc = ARMISD::VQSHLsu; break;
7941 case Intrinsic::arm_neon_vqshiftns:
7942 VShiftOpc = ARMISD::VQSHRNs; break;
7943 case Intrinsic::arm_neon_vqshiftnu:
7944 VShiftOpc = ARMISD::VQSHRNu; break;
7945 case Intrinsic::arm_neon_vqshiftnsu:
7946 VShiftOpc = ARMISD::VQSHRNsu; break;
7947 case Intrinsic::arm_neon_vqrshiftns:
7948 VShiftOpc = ARMISD::VQRSHRNs; break;
7949 case Intrinsic::arm_neon_vqrshiftnu:
7950 VShiftOpc = ARMISD::VQRSHRNu; break;
7951 case Intrinsic::arm_neon_vqrshiftnsu:
7952 VShiftOpc = ARMISD::VQRSHRNsu; break;
7955 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
7956 N->getOperand(1), DAG.getConstant(Cnt, MVT::i32));
7959 case Intrinsic::arm_neon_vshiftins: {
7960 EVT VT = N->getOperand(1).getValueType();
7962 unsigned VShiftOpc = 0;
7964 if (isVShiftLImm(N->getOperand(3), VT, false, Cnt))
7965 VShiftOpc = ARMISD::VSLI;
7966 else if (isVShiftRImm(N->getOperand(3), VT, false, true, Cnt))
7967 VShiftOpc = ARMISD::VSRI;
7969 llvm_unreachable("invalid shift count for vsli/vsri intrinsic");
7972 return DAG.getNode(VShiftOpc, N->getDebugLoc(), N->getValueType(0),
7973 N->getOperand(1), N->getOperand(2),
7974 DAG.getConstant(Cnt, MVT::i32));
7977 case Intrinsic::arm_neon_vqrshifts:
7978 case Intrinsic::arm_neon_vqrshiftu:
7979 // No immediate versions of these to check for.
7986 /// PerformShiftCombine - Checks for immediate versions of vector shifts and
7987 /// lowers them. As with the vector shift intrinsics, this is done during DAG
7988 /// combining instead of DAG legalizing because the build_vectors for 64-bit
7989 /// vector element shift counts are generally not legal, and it is hard to see
7990 /// their values after they get legalized to loads from a constant pool.
7991 static SDValue PerformShiftCombine(SDNode *N, SelectionDAG &DAG,
7992 const ARMSubtarget *ST) {
7993 EVT VT = N->getValueType(0);
7994 if (N->getOpcode() == ISD::SRL && VT == MVT::i32 && ST->hasV6Ops()) {
7995 // Canonicalize (srl (bswap x), 16) to (rotr (bswap x), 16) if the high
7996 // 16-bits of x is zero. This optimizes rev + lsr 16 to rev16.
7997 SDValue N1 = N->getOperand(1);
7998 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N1)) {
7999 SDValue N0 = N->getOperand(0);
8000 if (C->getZExtValue() == 16 && N0.getOpcode() == ISD::BSWAP &&
8001 DAG.MaskedValueIsZero(N0.getOperand(0),
8002 APInt::getHighBitsSet(32, 16)))
8003 return DAG.getNode(ISD::ROTR, N->getDebugLoc(), VT, N0, N1);
8007 // Nothing to be done for scalar shifts.
8008 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8009 if (!VT.isVector() || !TLI.isTypeLegal(VT))
8012 assert(ST->hasNEON() && "unexpected vector shift");
8015 switch (N->getOpcode()) {
8016 default: llvm_unreachable("unexpected shift opcode");
8019 if (isVShiftLImm(N->getOperand(1), VT, false, Cnt))
8020 return DAG.getNode(ARMISD::VSHL, N->getDebugLoc(), VT, N->getOperand(0),
8021 DAG.getConstant(Cnt, MVT::i32));
8026 if (isVShiftRImm(N->getOperand(1), VT, false, false, Cnt)) {
8027 unsigned VShiftOpc = (N->getOpcode() == ISD::SRA ?
8028 ARMISD::VSHRs : ARMISD::VSHRu);
8029 return DAG.getNode(VShiftOpc, N->getDebugLoc(), VT, N->getOperand(0),
8030 DAG.getConstant(Cnt, MVT::i32));
8036 /// PerformExtendCombine - Target-specific DAG combining for ISD::SIGN_EXTEND,
8037 /// ISD::ZERO_EXTEND, and ISD::ANY_EXTEND.
8038 static SDValue PerformExtendCombine(SDNode *N, SelectionDAG &DAG,
8039 const ARMSubtarget *ST) {
8040 SDValue N0 = N->getOperand(0);
8042 // Check for sign- and zero-extensions of vector extract operations of 8-
8043 // and 16-bit vector elements. NEON supports these directly. They are
8044 // handled during DAG combining because type legalization will promote them
8045 // to 32-bit types and it is messy to recognize the operations after that.
8046 if (ST->hasNEON() && N0.getOpcode() == ISD::EXTRACT_VECTOR_ELT) {
8047 SDValue Vec = N0.getOperand(0);
8048 SDValue Lane = N0.getOperand(1);
8049 EVT VT = N->getValueType(0);
8050 EVT EltVT = N0.getValueType();
8051 const TargetLowering &TLI = DAG.getTargetLoweringInfo();
8053 if (VT == MVT::i32 &&
8054 (EltVT == MVT::i8 || EltVT == MVT::i16) &&
8055 TLI.isTypeLegal(Vec.getValueType()) &&
8056 isa<ConstantSDNode>(Lane)) {
8059 switch (N->getOpcode()) {
8060 default: llvm_unreachable("unexpected opcode");
8061 case ISD::SIGN_EXTEND:
8062 Opc = ARMISD::VGETLANEs;
8064 case ISD::ZERO_EXTEND:
8065 case ISD::ANY_EXTEND:
8066 Opc = ARMISD::VGETLANEu;
8069 return DAG.getNode(Opc, N->getDebugLoc(), VT, Vec, Lane);
8076 /// PerformSELECT_CCCombine - Target-specific DAG combining for ISD::SELECT_CC
8077 /// to match f32 max/min patterns to use NEON vmax/vmin instructions.
8078 static SDValue PerformSELECT_CCCombine(SDNode *N, SelectionDAG &DAG,
8079 const ARMSubtarget *ST) {
8080 // If the target supports NEON, try to use vmax/vmin instructions for f32
8081 // selects like "x < y ? x : y". Unless the NoNaNsFPMath option is set,
8082 // be careful about NaNs: NEON's vmax/vmin return NaN if either operand is
8083 // a NaN; only do the transformation when it matches that behavior.
8085 // For now only do this when using NEON for FP operations; if using VFP, it
8086 // is not obvious that the benefit outweighs the cost of switching to the
8088 if (!ST->hasNEON() || !ST->useNEONForSinglePrecisionFP() ||
8089 N->getValueType(0) != MVT::f32)
8092 SDValue CondLHS = N->getOperand(0);
8093 SDValue CondRHS = N->getOperand(1);
8094 SDValue LHS = N->getOperand(2);
8095 SDValue RHS = N->getOperand(3);
8096 ISD::CondCode CC = cast<CondCodeSDNode>(N->getOperand(4))->get();
8098 unsigned Opcode = 0;
8100 if (DAG.isEqualTo(LHS, CondLHS) && DAG.isEqualTo(RHS, CondRHS)) {
8101 IsReversed = false; // x CC y ? x : y
8102 } else if (DAG.isEqualTo(LHS, CondRHS) && DAG.isEqualTo(RHS, CondLHS)) {
8103 IsReversed = true ; // x CC y ? y : x
8117 // If LHS is NaN, an ordered comparison will be false and the result will
8118 // be the RHS, but vmin(NaN, RHS) = NaN. Avoid this by checking that LHS
8119 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
8120 IsUnordered = (CC == ISD::SETULT || CC == ISD::SETULE);
8121 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
8123 // For less-than-or-equal comparisons, "+0 <= -0" will be true but vmin
8124 // will return -0, so vmin can only be used for unsafe math or if one of
8125 // the operands is known to be nonzero.
8126 if ((CC == ISD::SETLE || CC == ISD::SETOLE || CC == ISD::SETULE) &&
8127 !DAG.getTarget().Options.UnsafeFPMath &&
8128 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
8130 Opcode = IsReversed ? ARMISD::FMAX : ARMISD::FMIN;
8139 // If LHS is NaN, an ordered comparison will be false and the result will
8140 // be the RHS, but vmax(NaN, RHS) = NaN. Avoid this by checking that LHS
8141 // != NaN. Likewise, for unordered comparisons, check for RHS != NaN.
8142 IsUnordered = (CC == ISD::SETUGT || CC == ISD::SETUGE);
8143 if (!DAG.isKnownNeverNaN(IsUnordered ? RHS : LHS))
8145 // For greater-than-or-equal comparisons, "-0 >= +0" will be true but vmax
8146 // will return +0, so vmax can only be used for unsafe math or if one of
8147 // the operands is known to be nonzero.
8148 if ((CC == ISD::SETGE || CC == ISD::SETOGE || CC == ISD::SETUGE) &&
8149 !DAG.getTarget().Options.UnsafeFPMath &&
8150 !(DAG.isKnownNeverZero(LHS) || DAG.isKnownNeverZero(RHS)))
8152 Opcode = IsReversed ? ARMISD::FMIN : ARMISD::FMAX;
8158 return DAG.getNode(Opcode, N->getDebugLoc(), N->getValueType(0), LHS, RHS);
8161 /// PerformCMOVCombine - Target-specific DAG combining for ARMISD::CMOV.
8163 ARMTargetLowering::PerformCMOVCombine(SDNode *N, SelectionDAG &DAG) const {
8164 SDValue Cmp = N->getOperand(4);
8165 if (Cmp.getOpcode() != ARMISD::CMPZ)
8166 // Only looking at EQ and NE cases.
8169 EVT VT = N->getValueType(0);
8170 DebugLoc dl = N->getDebugLoc();
8171 SDValue LHS = Cmp.getOperand(0);
8172 SDValue RHS = Cmp.getOperand(1);
8173 SDValue FalseVal = N->getOperand(0);
8174 SDValue TrueVal = N->getOperand(1);
8175 SDValue ARMcc = N->getOperand(2);
8176 ARMCC::CondCodes CC =
8177 (ARMCC::CondCodes)cast<ConstantSDNode>(ARMcc)->getZExtValue();
8195 /// FIXME: Turn this into a target neutral optimization?
8197 if (CC == ARMCC::NE && FalseVal == RHS && FalseVal != LHS) {
8198 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, TrueVal, ARMcc,
8199 N->getOperand(3), Cmp);
8200 } else if (CC == ARMCC::EQ && TrueVal == RHS) {
8202 SDValue NewCmp = getARMCmp(LHS, RHS, ISD::SETNE, ARMcc, DAG, dl);
8203 Res = DAG.getNode(ARMISD::CMOV, dl, VT, LHS, FalseVal, ARMcc,
8204 N->getOperand(3), NewCmp);
8207 if (Res.getNode()) {
8208 APInt KnownZero, KnownOne;
8209 APInt Mask = APInt::getAllOnesValue(VT.getScalarType().getSizeInBits());
8210 DAG.ComputeMaskedBits(SDValue(N,0), Mask, KnownZero, KnownOne);
8211 // Capture demanded bits information that would be otherwise lost.
8212 if (KnownZero == 0xfffffffe)
8213 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8214 DAG.getValueType(MVT::i1));
8215 else if (KnownZero == 0xffffff00)
8216 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8217 DAG.getValueType(MVT::i8));
8218 else if (KnownZero == 0xffff0000)
8219 Res = DAG.getNode(ISD::AssertZext, dl, MVT::i32, Res,
8220 DAG.getValueType(MVT::i16));
8226 SDValue ARMTargetLowering::PerformDAGCombine(SDNode *N,
8227 DAGCombinerInfo &DCI) const {
8228 switch (N->getOpcode()) {
8230 case ISD::ADD: return PerformADDCombine(N, DCI, Subtarget);
8231 case ISD::SUB: return PerformSUBCombine(N, DCI);
8232 case ISD::MUL: return PerformMULCombine(N, DCI, Subtarget);
8233 case ISD::OR: return PerformORCombine(N, DCI, Subtarget);
8234 case ISD::XOR: return PerformXORCombine(N, DCI, Subtarget);
8235 case ISD::AND: return PerformANDCombine(N, DCI, Subtarget);
8236 case ARMISD::BFI: return PerformBFICombine(N, DCI);
8237 case ARMISD::VMOVRRD: return PerformVMOVRRDCombine(N, DCI);
8238 case ARMISD::VMOVDRR: return PerformVMOVDRRCombine(N, DCI.DAG);
8239 case ISD::STORE: return PerformSTORECombine(N, DCI);
8240 case ISD::BUILD_VECTOR: return PerformBUILD_VECTORCombine(N, DCI);
8241 case ISD::INSERT_VECTOR_ELT: return PerformInsertEltCombine(N, DCI);
8242 case ISD::VECTOR_SHUFFLE: return PerformVECTOR_SHUFFLECombine(N, DCI.DAG);
8243 case ARMISD::VDUPLANE: return PerformVDUPLANECombine(N, DCI);
8244 case ISD::FP_TO_SINT:
8245 case ISD::FP_TO_UINT: return PerformVCVTCombine(N, DCI, Subtarget);
8246 case ISD::FDIV: return PerformVDIVCombine(N, DCI, Subtarget);
8247 case ISD::INTRINSIC_WO_CHAIN: return PerformIntrinsicCombine(N, DCI.DAG);
8250 case ISD::SRL: return PerformShiftCombine(N, DCI.DAG, Subtarget);
8251 case ISD::SIGN_EXTEND:
8252 case ISD::ZERO_EXTEND:
8253 case ISD::ANY_EXTEND: return PerformExtendCombine(N, DCI.DAG, Subtarget);
8254 case ISD::SELECT_CC: return PerformSELECT_CCCombine(N, DCI.DAG, Subtarget);
8255 case ARMISD::CMOV: return PerformCMOVCombine(N, DCI.DAG);
8256 case ARMISD::VLD2DUP:
8257 case ARMISD::VLD3DUP:
8258 case ARMISD::VLD4DUP:
8259 return CombineBaseUpdate(N, DCI);
8260 case ISD::INTRINSIC_VOID:
8261 case ISD::INTRINSIC_W_CHAIN:
8262 switch (cast<ConstantSDNode>(N->getOperand(1))->getZExtValue()) {
8263 case Intrinsic::arm_neon_vld1:
8264 case Intrinsic::arm_neon_vld2:
8265 case Intrinsic::arm_neon_vld3:
8266 case Intrinsic::arm_neon_vld4:
8267 case Intrinsic::arm_neon_vld2lane:
8268 case Intrinsic::arm_neon_vld3lane:
8269 case Intrinsic::arm_neon_vld4lane:
8270 case Intrinsic::arm_neon_vst1:
8271 case Intrinsic::arm_neon_vst2:
8272 case Intrinsic::arm_neon_vst3:
8273 case Intrinsic::arm_neon_vst4:
8274 case Intrinsic::arm_neon_vst2lane:
8275 case Intrinsic::arm_neon_vst3lane:
8276 case Intrinsic::arm_neon_vst4lane:
8277 return CombineBaseUpdate(N, DCI);
8285 bool ARMTargetLowering::isDesirableToTransformToIntegerOp(unsigned Opc,
8287 return (VT == MVT::f32) && (Opc == ISD::LOAD || Opc == ISD::STORE);
8290 bool ARMTargetLowering::allowsUnalignedMemoryAccesses(EVT VT) const {
8291 if (!Subtarget->allowsUnalignedMem())
8294 switch (VT.getSimpleVT().SimpleTy) {
8301 // FIXME: VLD1 etc with standard alignment is legal.
8305 static bool memOpAlign(unsigned DstAlign, unsigned SrcAlign,
8306 unsigned AlignCheck) {
8307 return ((SrcAlign == 0 || SrcAlign % AlignCheck == 0) &&
8308 (DstAlign == 0 || DstAlign % AlignCheck == 0));
8311 EVT ARMTargetLowering::getOptimalMemOpType(uint64_t Size,
8312 unsigned DstAlign, unsigned SrcAlign,
8315 MachineFunction &MF) const {
8316 const Function *F = MF.getFunction();
8318 // See if we can use NEON instructions for this...
8320 !F->hasFnAttr(Attribute::NoImplicitFloat) &&
8321 Subtarget->hasNEON()) {
8322 if (memOpAlign(SrcAlign, DstAlign, 16) && Size >= 16) {
8324 } else if (memOpAlign(SrcAlign, DstAlign, 8) && Size >= 8) {
8329 // Lowering to i32/i16 if the size permits.
8332 } else if (Size >= 2) {
8336 // Let the target-independent logic figure it out.
8340 static bool isLegalT1AddressImmediate(int64_t V, EVT VT) {
8345 switch (VT.getSimpleVT().SimpleTy) {
8346 default: return false;
8361 if ((V & (Scale - 1)) != 0)
8364 return V == (V & ((1LL << 5) - 1));
8367 static bool isLegalT2AddressImmediate(int64_t V, EVT VT,
8368 const ARMSubtarget *Subtarget) {
8375 switch (VT.getSimpleVT().SimpleTy) {
8376 default: return false;
8381 // + imm12 or - imm8
8383 return V == (V & ((1LL << 8) - 1));
8384 return V == (V & ((1LL << 12) - 1));
8387 // Same as ARM mode. FIXME: NEON?
8388 if (!Subtarget->hasVFP2())
8393 return V == (V & ((1LL << 8) - 1));
8397 /// isLegalAddressImmediate - Return true if the integer value can be used
8398 /// as the offset of the target addressing mode for load / store of the
8400 static bool isLegalAddressImmediate(int64_t V, EVT VT,
8401 const ARMSubtarget *Subtarget) {
8408 if (Subtarget->isThumb1Only())
8409 return isLegalT1AddressImmediate(V, VT);
8410 else if (Subtarget->isThumb2())
8411 return isLegalT2AddressImmediate(V, VT, Subtarget);
8416 switch (VT.getSimpleVT().SimpleTy) {
8417 default: return false;
8422 return V == (V & ((1LL << 12) - 1));
8425 return V == (V & ((1LL << 8) - 1));
8428 if (!Subtarget->hasVFP2()) // FIXME: NEON?
8433 return V == (V & ((1LL << 8) - 1));
8437 bool ARMTargetLowering::isLegalT2ScaledAddressingMode(const AddrMode &AM,
8439 int Scale = AM.Scale;
8443 switch (VT.getSimpleVT().SimpleTy) {
8444 default: return false;
8453 return Scale == 2 || Scale == 4 || Scale == 8;
8456 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
8460 // Note, we allow "void" uses (basically, uses that aren't loads or
8461 // stores), because arm allows folding a scale into many arithmetic
8462 // operations. This should be made more precise and revisited later.
8464 // Allow r << imm, but the imm has to be a multiple of two.
8465 if (Scale & 1) return false;
8466 return isPowerOf2_32(Scale);
8470 /// isLegalAddressingMode - Return true if the addressing mode represented
8471 /// by AM is legal for this target, for a load/store of the specified type.
8472 bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM,
8474 EVT VT = getValueType(Ty, true);
8475 if (!isLegalAddressImmediate(AM.BaseOffs, VT, Subtarget))
8478 // Can never fold addr of global into load/store.
8483 case 0: // no scale reg, must be "r+i" or "r", or "i".
8486 if (Subtarget->isThumb1Only())
8490 // ARM doesn't support any R+R*scale+imm addr modes.
8497 if (Subtarget->isThumb2())
8498 return isLegalT2ScaledAddressingMode(AM, VT);
8500 int Scale = AM.Scale;
8501 switch (VT.getSimpleVT().SimpleTy) {
8502 default: return false;
8506 if (Scale < 0) Scale = -Scale;
8510 return isPowerOf2_32(Scale & ~1);
8514 if (((unsigned)AM.HasBaseReg + Scale) <= 2)
8519 // Note, we allow "void" uses (basically, uses that aren't loads or
8520 // stores), because arm allows folding a scale into many arithmetic
8521 // operations. This should be made more precise and revisited later.
8523 // Allow r << imm, but the imm has to be a multiple of two.
8524 if (Scale & 1) return false;
8525 return isPowerOf2_32(Scale);
8531 /// isLegalICmpImmediate - Return true if the specified immediate is legal
8532 /// icmp immediate, that is the target has icmp instructions which can compare
8533 /// a register against the immediate without having to materialize the
8534 /// immediate into a register.
8535 bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const {
8536 if (!Subtarget->isThumb())
8537 return ARM_AM::getSOImmVal(Imm) != -1;
8538 if (Subtarget->isThumb2())
8539 return ARM_AM::getT2SOImmVal(Imm) != -1;
8540 return Imm >= 0 && Imm <= 255;
8543 /// isLegalAddImmediate - Return true if the specified immediate is legal
8544 /// add immediate, that is the target has add instructions which can add
8545 /// a register with the immediate without having to materialize the
8546 /// immediate into a register.
8547 bool ARMTargetLowering::isLegalAddImmediate(int64_t Imm) const {
8548 return ARM_AM::getSOImmVal(Imm) != -1;
8551 static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
8552 bool isSEXTLoad, SDValue &Base,
8553 SDValue &Offset, bool &isInc,
8554 SelectionDAG &DAG) {
8555 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
8558 if (VT == MVT::i16 || ((VT == MVT::i8 || VT == MVT::i1) && isSEXTLoad)) {
8560 Base = Ptr->getOperand(0);
8561 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
8562 int RHSC = (int)RHS->getZExtValue();
8563 if (RHSC < 0 && RHSC > -256) {
8564 assert(Ptr->getOpcode() == ISD::ADD);
8566 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
8570 isInc = (Ptr->getOpcode() == ISD::ADD);
8571 Offset = Ptr->getOperand(1);
8573 } else if (VT == MVT::i32 || VT == MVT::i8 || VT == MVT::i1) {
8575 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
8576 int RHSC = (int)RHS->getZExtValue();
8577 if (RHSC < 0 && RHSC > -0x1000) {
8578 assert(Ptr->getOpcode() == ISD::ADD);
8580 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
8581 Base = Ptr->getOperand(0);
8586 if (Ptr->getOpcode() == ISD::ADD) {
8588 ARM_AM::ShiftOpc ShOpcVal=
8589 ARM_AM::getShiftOpcForNode(Ptr->getOperand(0).getOpcode());
8590 if (ShOpcVal != ARM_AM::no_shift) {
8591 Base = Ptr->getOperand(1);
8592 Offset = Ptr->getOperand(0);
8594 Base = Ptr->getOperand(0);
8595 Offset = Ptr->getOperand(1);
8600 isInc = (Ptr->getOpcode() == ISD::ADD);
8601 Base = Ptr->getOperand(0);
8602 Offset = Ptr->getOperand(1);
8606 // FIXME: Use VLDM / VSTM to emulate indexed FP load / store.
8610 static bool getT2IndexedAddressParts(SDNode *Ptr, EVT VT,
8611 bool isSEXTLoad, SDValue &Base,
8612 SDValue &Offset, bool &isInc,
8613 SelectionDAG &DAG) {
8614 if (Ptr->getOpcode() != ISD::ADD && Ptr->getOpcode() != ISD::SUB)
8617 Base = Ptr->getOperand(0);
8618 if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(Ptr->getOperand(1))) {
8619 int RHSC = (int)RHS->getZExtValue();
8620 if (RHSC < 0 && RHSC > -0x100) { // 8 bits.
8621 assert(Ptr->getOpcode() == ISD::ADD);
8623 Offset = DAG.getConstant(-RHSC, RHS->getValueType(0));
8625 } else if (RHSC > 0 && RHSC < 0x100) { // 8 bit, no zero.
8626 isInc = Ptr->getOpcode() == ISD::ADD;
8627 Offset = DAG.getConstant(RHSC, RHS->getValueType(0));
8635 /// getPreIndexedAddressParts - returns true by value, base pointer and
8636 /// offset pointer and addressing mode by reference if the node's address
8637 /// can be legally represented as pre-indexed load / store address.
8639 ARMTargetLowering::getPreIndexedAddressParts(SDNode *N, SDValue &Base,
8641 ISD::MemIndexedMode &AM,
8642 SelectionDAG &DAG) const {
8643 if (Subtarget->isThumb1Only())
8648 bool isSEXTLoad = false;
8649 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
8650 Ptr = LD->getBasePtr();
8651 VT = LD->getMemoryVT();
8652 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
8653 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
8654 Ptr = ST->getBasePtr();
8655 VT = ST->getMemoryVT();
8660 bool isLegal = false;
8661 if (Subtarget->isThumb2())
8662 isLegal = getT2IndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
8663 Offset, isInc, DAG);
8665 isLegal = getARMIndexedAddressParts(Ptr.getNode(), VT, isSEXTLoad, Base,
8666 Offset, isInc, DAG);
8670 AM = isInc ? ISD::PRE_INC : ISD::PRE_DEC;
8674 /// getPostIndexedAddressParts - returns true by value, base pointer and
8675 /// offset pointer and addressing mode by reference if this node can be
8676 /// combined with a load / store to form a post-indexed load / store.
8677 bool ARMTargetLowering::getPostIndexedAddressParts(SDNode *N, SDNode *Op,
8680 ISD::MemIndexedMode &AM,
8681 SelectionDAG &DAG) const {
8682 if (Subtarget->isThumb1Only())
8687 bool isSEXTLoad = false;
8688 if (LoadSDNode *LD = dyn_cast<LoadSDNode>(N)) {
8689 VT = LD->getMemoryVT();
8690 Ptr = LD->getBasePtr();
8691 isSEXTLoad = LD->getExtensionType() == ISD::SEXTLOAD;
8692 } else if (StoreSDNode *ST = dyn_cast<StoreSDNode>(N)) {
8693 VT = ST->getMemoryVT();
8694 Ptr = ST->getBasePtr();
8699 bool isLegal = false;
8700 if (Subtarget->isThumb2())
8701 isLegal = getT2IndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
8704 isLegal = getARMIndexedAddressParts(Op, VT, isSEXTLoad, Base, Offset,
8710 // Swap base ptr and offset to catch more post-index load / store when
8711 // it's legal. In Thumb2 mode, offset must be an immediate.
8712 if (Ptr == Offset && Op->getOpcode() == ISD::ADD &&
8713 !Subtarget->isThumb2())
8714 std::swap(Base, Offset);
8716 // Post-indexed load / store update the base pointer.
8721 AM = isInc ? ISD::POST_INC : ISD::POST_DEC;
8725 void ARMTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
8729 const SelectionDAG &DAG,
8730 unsigned Depth) const {
8731 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0);
8732 switch (Op.getOpcode()) {
8734 case ARMISD::CMOV: {
8735 // Bits are known zero/one if known on the LHS and RHS.
8736 DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero, KnownOne, Depth+1);
8737 if (KnownZero == 0 && KnownOne == 0) return;
8739 APInt KnownZeroRHS, KnownOneRHS;
8740 DAG.ComputeMaskedBits(Op.getOperand(1), Mask,
8741 KnownZeroRHS, KnownOneRHS, Depth+1);
8742 KnownZero &= KnownZeroRHS;
8743 KnownOne &= KnownOneRHS;
8749 //===----------------------------------------------------------------------===//
8750 // ARM Inline Assembly Support
8751 //===----------------------------------------------------------------------===//
8753 bool ARMTargetLowering::ExpandInlineAsm(CallInst *CI) const {
8754 // Looking for "rev" which is V6+.
8755 if (!Subtarget->hasV6Ops())
8758 InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
8759 std::string AsmStr = IA->getAsmString();
8760 SmallVector<StringRef, 4> AsmPieces;
8761 SplitString(AsmStr, AsmPieces, ";\n");
8763 switch (AsmPieces.size()) {
8764 default: return false;
8766 AsmStr = AsmPieces[0];
8768 SplitString(AsmStr, AsmPieces, " \t,");
8771 if (AsmPieces.size() == 3 &&
8772 AsmPieces[0] == "rev" && AsmPieces[1] == "$0" && AsmPieces[2] == "$1" &&
8773 IA->getConstraintString().compare(0, 4, "=l,l") == 0) {
8774 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
8775 if (Ty && Ty->getBitWidth() == 32)
8776 return IntrinsicLowering::LowerToByteSwap(CI);
8784 /// getConstraintType - Given a constraint letter, return the type of
8785 /// constraint it is for this target.
8786 ARMTargetLowering::ConstraintType
8787 ARMTargetLowering::getConstraintType(const std::string &Constraint) const {
8788 if (Constraint.size() == 1) {
8789 switch (Constraint[0]) {
8791 case 'l': return C_RegisterClass;
8792 case 'w': return C_RegisterClass;
8793 case 'h': return C_RegisterClass;
8794 case 'x': return C_RegisterClass;
8795 case 't': return C_RegisterClass;
8796 case 'j': return C_Other; // Constant for movw.
8797 // An address with a single base register. Due to the way we
8798 // currently handle addresses it is the same as an 'r' memory constraint.
8799 case 'Q': return C_Memory;
8801 } else if (Constraint.size() == 2) {
8802 switch (Constraint[0]) {
8804 // All 'U+' constraints are addresses.
8805 case 'U': return C_Memory;
8808 return TargetLowering::getConstraintType(Constraint);
8811 /// Examine constraint type and operand type and determine a weight value.
8812 /// This object must already have been set up with the operand type
8813 /// and the current alternative constraint selected.
8814 TargetLowering::ConstraintWeight
8815 ARMTargetLowering::getSingleConstraintMatchWeight(
8816 AsmOperandInfo &info, const char *constraint) const {
8817 ConstraintWeight weight = CW_Invalid;
8818 Value *CallOperandVal = info.CallOperandVal;
8819 // If we don't have a value, we can't do a match,
8820 // but allow it at the lowest weight.
8821 if (CallOperandVal == NULL)
8823 Type *type = CallOperandVal->getType();
8824 // Look at the constraint type.
8825 switch (*constraint) {
8827 weight = TargetLowering::getSingleConstraintMatchWeight(info, constraint);
8830 if (type->isIntegerTy()) {
8831 if (Subtarget->isThumb())
8832 weight = CW_SpecificReg;
8834 weight = CW_Register;
8838 if (type->isFloatingPointTy())
8839 weight = CW_Register;
8845 typedef std::pair<unsigned, const TargetRegisterClass*> RCPair;
8847 ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
8849 if (Constraint.size() == 1) {
8850 // GCC ARM Constraint Letters
8851 switch (Constraint[0]) {
8852 case 'l': // Low regs or general regs.
8853 if (Subtarget->isThumb())
8854 return RCPair(0U, ARM::tGPRRegisterClass);
8856 return RCPair(0U, ARM::GPRRegisterClass);
8857 case 'h': // High regs or no regs.
8858 if (Subtarget->isThumb())
8859 return RCPair(0U, ARM::hGPRRegisterClass);
8862 return RCPair(0U, ARM::GPRRegisterClass);
8865 return RCPair(0U, ARM::SPRRegisterClass);
8866 if (VT.getSizeInBits() == 64)
8867 return RCPair(0U, ARM::DPRRegisterClass);
8868 if (VT.getSizeInBits() == 128)
8869 return RCPair(0U, ARM::QPRRegisterClass);
8873 return RCPair(0U, ARM::SPR_8RegisterClass);
8874 if (VT.getSizeInBits() == 64)
8875 return RCPair(0U, ARM::DPR_8RegisterClass);
8876 if (VT.getSizeInBits() == 128)
8877 return RCPair(0U, ARM::QPR_8RegisterClass);
8881 return RCPair(0U, ARM::SPRRegisterClass);
8885 if (StringRef("{cc}").equals_lower(Constraint))
8886 return std::make_pair(unsigned(ARM::CPSR), ARM::CCRRegisterClass);
8888 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
8891 /// LowerAsmOperandForConstraint - Lower the specified operand into the Ops
8892 /// vector. If it is invalid, don't add anything to Ops.
8893 void ARMTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
8894 std::string &Constraint,
8895 std::vector<SDValue>&Ops,
8896 SelectionDAG &DAG) const {
8897 SDValue Result(0, 0);
8899 // Currently only support length 1 constraints.
8900 if (Constraint.length() != 1) return;
8902 char ConstraintLetter = Constraint[0];
8903 switch (ConstraintLetter) {
8906 case 'I': case 'J': case 'K': case 'L':
8907 case 'M': case 'N': case 'O':
8908 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
8912 int64_t CVal64 = C->getSExtValue();
8913 int CVal = (int) CVal64;
8914 // None of these constraints allow values larger than 32 bits. Check
8915 // that the value fits in an int.
8919 switch (ConstraintLetter) {
8921 // Constant suitable for movw, must be between 0 and
8923 if (Subtarget->hasV6T2Ops())
8924 if (CVal >= 0 && CVal <= 65535)
8928 if (Subtarget->isThumb1Only()) {
8929 // This must be a constant between 0 and 255, for ADD
8931 if (CVal >= 0 && CVal <= 255)
8933 } else if (Subtarget->isThumb2()) {
8934 // A constant that can be used as an immediate value in a
8935 // data-processing instruction.
8936 if (ARM_AM::getT2SOImmVal(CVal) != -1)
8939 // A constant that can be used as an immediate value in a
8940 // data-processing instruction.
8941 if (ARM_AM::getSOImmVal(CVal) != -1)
8947 if (Subtarget->isThumb()) { // FIXME thumb2
8948 // This must be a constant between -255 and -1, for negated ADD
8949 // immediates. This can be used in GCC with an "n" modifier that
8950 // prints the negated value, for use with SUB instructions. It is
8951 // not useful otherwise but is implemented for compatibility.
8952 if (CVal >= -255 && CVal <= -1)
8955 // This must be a constant between -4095 and 4095. It is not clear
8956 // what this constraint is intended for. Implemented for
8957 // compatibility with GCC.
8958 if (CVal >= -4095 && CVal <= 4095)
8964 if (Subtarget->isThumb1Only()) {
8965 // A 32-bit value where only one byte has a nonzero value. Exclude
8966 // zero to match GCC. This constraint is used by GCC internally for
8967 // constants that can be loaded with a move/shift combination.
8968 // It is not useful otherwise but is implemented for compatibility.
8969 if (CVal != 0 && ARM_AM::isThumbImmShiftedVal(CVal))
8971 } else if (Subtarget->isThumb2()) {
8972 // A constant whose bitwise inverse can be used as an immediate
8973 // value in a data-processing instruction. This can be used in GCC
8974 // with a "B" modifier that prints the inverted value, for use with
8975 // BIC and MVN instructions. It is not useful otherwise but is
8976 // implemented for compatibility.
8977 if (ARM_AM::getT2SOImmVal(~CVal) != -1)
8980 // A constant whose bitwise inverse can be used as an immediate
8981 // value in a data-processing instruction. This can be used in GCC
8982 // with a "B" modifier that prints the inverted value, for use with
8983 // BIC and MVN instructions. It is not useful otherwise but is
8984 // implemented for compatibility.
8985 if (ARM_AM::getSOImmVal(~CVal) != -1)
8991 if (Subtarget->isThumb1Only()) {
8992 // This must be a constant between -7 and 7,
8993 // for 3-operand ADD/SUB immediate instructions.
8994 if (CVal >= -7 && CVal < 7)
8996 } else if (Subtarget->isThumb2()) {
8997 // A constant whose negation can be used as an immediate value in a
8998 // data-processing instruction. This can be used in GCC with an "n"
8999 // modifier that prints the negated value, for use with SUB
9000 // instructions. It is not useful otherwise but is implemented for
9002 if (ARM_AM::getT2SOImmVal(-CVal) != -1)
9005 // A constant whose negation can be used as an immediate value in a
9006 // data-processing instruction. This can be used in GCC with an "n"
9007 // modifier that prints the negated value, for use with SUB
9008 // instructions. It is not useful otherwise but is implemented for
9010 if (ARM_AM::getSOImmVal(-CVal) != -1)
9016 if (Subtarget->isThumb()) { // FIXME thumb2
9017 // This must be a multiple of 4 between 0 and 1020, for
9018 // ADD sp + immediate.
9019 if ((CVal >= 0 && CVal <= 1020) && ((CVal & 3) == 0))
9022 // A power of two or a constant between 0 and 32. This is used in
9023 // GCC for the shift amount on shifted register operands, but it is
9024 // useful in general for any shift amounts.
9025 if ((CVal >= 0 && CVal <= 32) || ((CVal & (CVal - 1)) == 0))
9031 if (Subtarget->isThumb()) { // FIXME thumb2
9032 // This must be a constant between 0 and 31, for shift amounts.
9033 if (CVal >= 0 && CVal <= 31)
9039 if (Subtarget->isThumb()) { // FIXME thumb2
9040 // This must be a multiple of 4 between -508 and 508, for
9041 // ADD/SUB sp = sp + immediate.
9042 if ((CVal >= -508 && CVal <= 508) && ((CVal & 3) == 0))
9047 Result = DAG.getTargetConstant(CVal, Op.getValueType());
9051 if (Result.getNode()) {
9052 Ops.push_back(Result);
9055 return TargetLowering::LowerAsmOperandForConstraint(Op, Constraint, Ops, DAG);
9059 ARMTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
9060 // The ARM target isn't yet aware of offsets.
9064 bool ARM::isBitFieldInvertedMask(unsigned v) {
9065 if (v == 0xffffffff)
9067 // there can be 1's on either or both "outsides", all the "inside"
9069 unsigned int lsb = 0, msb = 31;
9070 while (v & (1 << msb)) --msb;
9071 while (v & (1 << lsb)) ++lsb;
9072 for (unsigned int i = lsb; i <= msb; ++i) {
9079 /// isFPImmLegal - Returns true if the target can instruction select the
9080 /// specified FP immediate natively. If false, the legalizer will
9081 /// materialize the FP immediate as a load from a constant pool.
9082 bool ARMTargetLowering::isFPImmLegal(const APFloat &Imm, EVT VT) const {
9083 if (!Subtarget->hasVFP3())
9086 return ARM_AM::getFP32Imm(Imm) != -1;
9088 return ARM_AM::getFP64Imm(Imm) != -1;
9092 /// getTgtMemIntrinsic - Represent NEON load and store intrinsics as
9093 /// MemIntrinsicNodes. The associated MachineMemOperands record the alignment
9094 /// specified in the intrinsic calls.
9095 bool ARMTargetLowering::getTgtMemIntrinsic(IntrinsicInfo &Info,
9097 unsigned Intrinsic) const {
9098 switch (Intrinsic) {
9099 case Intrinsic::arm_neon_vld1:
9100 case Intrinsic::arm_neon_vld2:
9101 case Intrinsic::arm_neon_vld3:
9102 case Intrinsic::arm_neon_vld4:
9103 case Intrinsic::arm_neon_vld2lane:
9104 case Intrinsic::arm_neon_vld3lane:
9105 case Intrinsic::arm_neon_vld4lane: {
9106 Info.opc = ISD::INTRINSIC_W_CHAIN;
9107 // Conservatively set memVT to the entire set of vectors loaded.
9108 uint64_t NumElts = getTargetData()->getTypeAllocSize(I.getType()) / 8;
9109 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
9110 Info.ptrVal = I.getArgOperand(0);
9112 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
9113 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
9114 Info.vol = false; // volatile loads with NEON intrinsics not supported
9115 Info.readMem = true;
9116 Info.writeMem = false;
9119 case Intrinsic::arm_neon_vst1:
9120 case Intrinsic::arm_neon_vst2:
9121 case Intrinsic::arm_neon_vst3:
9122 case Intrinsic::arm_neon_vst4:
9123 case Intrinsic::arm_neon_vst2lane:
9124 case Intrinsic::arm_neon_vst3lane:
9125 case Intrinsic::arm_neon_vst4lane: {
9126 Info.opc = ISD::INTRINSIC_VOID;
9127 // Conservatively set memVT to the entire set of vectors stored.
9128 unsigned NumElts = 0;
9129 for (unsigned ArgI = 1, ArgE = I.getNumArgOperands(); ArgI < ArgE; ++ArgI) {
9130 Type *ArgTy = I.getArgOperand(ArgI)->getType();
9131 if (!ArgTy->isVectorTy())
9133 NumElts += getTargetData()->getTypeAllocSize(ArgTy) / 8;
9135 Info.memVT = EVT::getVectorVT(I.getType()->getContext(), MVT::i64, NumElts);
9136 Info.ptrVal = I.getArgOperand(0);
9138 Value *AlignArg = I.getArgOperand(I.getNumArgOperands() - 1);
9139 Info.align = cast<ConstantInt>(AlignArg)->getZExtValue();
9140 Info.vol = false; // volatile stores with NEON intrinsics not supported
9141 Info.readMem = false;
9142 Info.writeMem = true;
9145 case Intrinsic::arm_strexd: {
9146 Info.opc = ISD::INTRINSIC_W_CHAIN;
9147 Info.memVT = MVT::i64;
9148 Info.ptrVal = I.getArgOperand(2);
9152 Info.readMem = false;
9153 Info.writeMem = true;
9156 case Intrinsic::arm_ldrexd: {
9157 Info.opc = ISD::INTRINSIC_W_CHAIN;
9158 Info.memVT = MVT::i64;
9159 Info.ptrVal = I.getArgOperand(0);
9163 Info.readMem = true;
9164 Info.writeMem = false;