1 //===-- PPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly ------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file contains a printer that converts from our internal representation
10 // of machine-dependent LLVM code to PowerPC assembly language. This printer is
11 // the output mechanism used by `llc'.
13 // Documentation at http://developer.apple.com/documentation/DeveloperTools/
14 // Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
16 //===----------------------------------------------------------------------===//
18 #include "MCTargetDesc/PPCInstPrinter.h"
19 #include "MCTargetDesc/PPCMCExpr.h"
20 #include "MCTargetDesc/PPCMCTargetDesc.h"
21 #include "MCTargetDesc/PPCPredicates.h"
23 #include "PPCInstrInfo.h"
24 #include "PPCMachineFunctionInfo.h"
25 #include "PPCSubtarget.h"
26 #include "PPCTargetMachine.h"
27 #include "PPCTargetStreamer.h"
28 #include "TargetInfo/PowerPCTargetInfo.h"
29 #include "llvm/ADT/MapVector.h"
30 #include "llvm/ADT/StringRef.h"
31 #include "llvm/ADT/Triple.h"
32 #include "llvm/ADT/Twine.h"
33 #include "llvm/BinaryFormat/ELF.h"
34 #include "llvm/BinaryFormat/MachO.h"
35 #include "llvm/CodeGen/AsmPrinter.h"
36 #include "llvm/CodeGen/MachineBasicBlock.h"
37 #include "llvm/CodeGen/MachineFunction.h"
38 #include "llvm/CodeGen/MachineInstr.h"
39 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
40 #include "llvm/CodeGen/MachineOperand.h"
41 #include "llvm/CodeGen/MachineRegisterInfo.h"
42 #include "llvm/CodeGen/StackMaps.h"
43 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
44 #include "llvm/IR/DataLayout.h"
45 #include "llvm/IR/GlobalValue.h"
46 #include "llvm/IR/Module.h"
47 #include "llvm/MC/MCAsmInfo.h"
48 #include "llvm/MC/MCContext.h"
49 #include "llvm/MC/MCExpr.h"
50 #include "llvm/MC/MCInst.h"
51 #include "llvm/MC/MCInstBuilder.h"
52 #include "llvm/MC/MCSectionELF.h"
53 #include "llvm/MC/MCSectionMachO.h"
54 #include "llvm/MC/MCStreamer.h"
55 #include "llvm/MC/MCSymbol.h"
56 #include "llvm/MC/MCSymbolELF.h"
57 #include "llvm/MC/SectionKind.h"
58 #include "llvm/Support/Casting.h"
59 #include "llvm/Support/CodeGen.h"
60 #include "llvm/Support/Debug.h"
61 #include "llvm/Support/ErrorHandling.h"
62 #include "llvm/Support/TargetRegistry.h"
63 #include "llvm/Support/raw_ostream.h"
64 #include "llvm/Target/TargetMachine.h"
73 #define DEBUG_TYPE "asmprinter"
77 class PPCAsmPrinter : public AsmPrinter {
79 MapVector<MCSymbol *, MCSymbol *> TOC;
80 const PPCSubtarget *Subtarget;
84 explicit PPCAsmPrinter(TargetMachine &TM,
85 std::unique_ptr<MCStreamer> Streamer)
86 : AsmPrinter(TM, std::move(Streamer)), SM(*this) {}
88 StringRef getPassName() const override { return "PowerPC Assembly Printer"; }
90 MCSymbol *lookUpOrCreateTOCEntry(MCSymbol *Sym);
92 bool doInitialization(Module &M) override {
95 return AsmPrinter::doInitialization(M);
98 void EmitInstruction(const MachineInstr *MI) override;
100 /// This function is for PrintAsmOperand and PrintAsmMemoryOperand,
101 /// invoked by EmitMSInlineAsmStr and EmitGCCInlineAsmStr only.
102 /// The \p MI would be INLINEASM ONLY.
103 void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
105 void PrintSymbolOperand(const MachineOperand &MO, raw_ostream &O) override;
106 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
107 const char *ExtraCode, raw_ostream &O) override;
108 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
109 const char *ExtraCode, raw_ostream &O) override;
111 void EmitEndOfAsmFile(Module &M) override;
113 void LowerSTACKMAP(StackMaps &SM, const MachineInstr &MI);
114 void LowerPATCHPOINT(StackMaps &SM, const MachineInstr &MI);
115 void EmitTlsCall(const MachineInstr *MI, MCSymbolRefExpr::VariantKind VK);
116 bool runOnMachineFunction(MachineFunction &MF) override {
117 Subtarget = &MF.getSubtarget<PPCSubtarget>();
118 bool Changed = AsmPrinter::runOnMachineFunction(MF);
124 /// PPCLinuxAsmPrinter - PowerPC assembly printer, customized for Linux
125 class PPCLinuxAsmPrinter : public PPCAsmPrinter {
127 explicit PPCLinuxAsmPrinter(TargetMachine &TM,
128 std::unique_ptr<MCStreamer> Streamer)
129 : PPCAsmPrinter(TM, std::move(Streamer)) {}
131 StringRef getPassName() const override {
132 return "Linux PPC Assembly Printer";
135 bool doFinalization(Module &M) override;
136 void EmitStartOfAsmFile(Module &M) override;
138 void EmitFunctionEntryLabel() override;
140 void EmitFunctionBodyStart() override;
141 void EmitFunctionBodyEnd() override;
142 void EmitInstruction(const MachineInstr *MI) override;
145 /// PPCDarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac
147 class PPCDarwinAsmPrinter : public PPCAsmPrinter {
149 explicit PPCDarwinAsmPrinter(TargetMachine &TM,
150 std::unique_ptr<MCStreamer> Streamer)
151 : PPCAsmPrinter(TM, std::move(Streamer)) {}
153 StringRef getPassName() const override {
154 return "Darwin PPC Assembly Printer";
157 bool doFinalization(Module &M) override;
158 void EmitStartOfAsmFile(Module &M) override;
161 class PPCAIXAsmPrinter : public PPCAsmPrinter {
163 PPCAIXAsmPrinter(TargetMachine &TM, std::unique_ptr<MCStreamer> Streamer)
164 : PPCAsmPrinter(TM, std::move(Streamer)) {}
166 StringRef getPassName() const override { return "AIX PPC Assembly Printer"; }
169 } // end anonymous namespace
171 void PPCAsmPrinter::PrintSymbolOperand(const MachineOperand &MO,
173 // Computing the address of a global symbol, not calling it.
174 const GlobalValue *GV = MO.getGlobal();
175 MCSymbol *SymToPrint;
177 // External or weakly linked global variables need non-lazily-resolved stubs
178 if (Subtarget->hasLazyResolverStub(GV)) {
179 SymToPrint = getSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
180 MachineModuleInfoImpl::StubValueTy &StubSym =
181 MMI->getObjFileInfo<MachineModuleInfoMachO>().getGVStubEntry(
183 if (!StubSym.getPointer())
184 StubSym = MachineModuleInfoImpl::StubValueTy(getSymbol(GV),
185 !GV->hasInternalLinkage());
187 SymToPrint = getSymbol(GV);
190 SymToPrint->print(O, MAI);
192 printOffset(MO.getOffset(), O);
195 void PPCAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
197 const DataLayout &DL = getDataLayout();
198 const MachineOperand &MO = MI->getOperand(OpNo);
200 switch (MO.getType()) {
201 case MachineOperand::MO_Register: {
202 // The MI is INLINEASM ONLY and UseVSXReg is always false.
203 const char *RegName = PPCInstPrinter::getRegisterName(MO.getReg());
205 // Linux assembler (Others?) does not take register mnemonics.
206 // FIXME - What about special registers used in mfspr/mtspr?
207 if (!Subtarget->isDarwin())
208 RegName = PPCRegisterInfo::stripRegisterPrefix(RegName);
212 case MachineOperand::MO_Immediate:
216 case MachineOperand::MO_MachineBasicBlock:
217 MO.getMBB()->getSymbol()->print(O, MAI);
219 case MachineOperand::MO_ConstantPoolIndex:
220 O << DL.getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
223 case MachineOperand::MO_BlockAddress:
224 GetBlockAddressSymbol(MO.getBlockAddress())->print(O, MAI);
226 case MachineOperand::MO_GlobalAddress: {
227 PrintSymbolOperand(MO, O);
232 O << "<unknown operand type: " << (unsigned)MO.getType() << ">";
237 /// PrintAsmOperand - Print out an operand for an inline asm expression.
239 bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
240 const char *ExtraCode, raw_ostream &O) {
241 // Does this asm operand have a single letter operand modifier?
242 if (ExtraCode && ExtraCode[0]) {
243 if (ExtraCode[1] != 0) return true; // Unknown modifier.
245 switch (ExtraCode[0]) {
247 // See if this is a generic print operand
248 return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O);
249 case 'L': // Write second word of DImode reference.
250 // Verify that this operand has two consecutive registers.
251 if (!MI->getOperand(OpNo).isReg() ||
252 OpNo+1 == MI->getNumOperands() ||
253 !MI->getOperand(OpNo+1).isReg())
255 ++OpNo; // Return the high-part.
258 // Write 'i' if an integer constant, otherwise nothing. Used to print
260 if (MI->getOperand(OpNo).isImm())
264 if(!MI->getOperand(OpNo).isReg())
266 // This operand uses VSX numbering.
267 // If the operand is a VMX register, convert it to a VSX register.
268 unsigned Reg = MI->getOperand(OpNo).getReg();
269 if (PPCInstrInfo::isVRRegister(Reg))
270 Reg = PPC::VSX32 + (Reg - PPC::V0);
271 else if (PPCInstrInfo::isVFRegister(Reg))
272 Reg = PPC::VSX32 + (Reg - PPC::VF0);
274 RegName = PPCInstPrinter::getRegisterName(Reg);
275 RegName = PPCRegisterInfo::stripRegisterPrefix(RegName);
281 printOperand(MI, OpNo, O);
285 // At the moment, all inline asm memory operands are a single register.
286 // In any case, the output of this routine should always be just one
287 // assembler operand.
289 bool PPCAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
290 const char *ExtraCode,
292 if (ExtraCode && ExtraCode[0]) {
293 if (ExtraCode[1] != 0) return true; // Unknown modifier.
295 switch (ExtraCode[0]) {
296 default: return true; // Unknown modifier.
297 case 'y': // A memory reference for an X-form instruction
299 const char *RegName = "r0";
300 if (!Subtarget->isDarwin())
301 RegName = PPCRegisterInfo::stripRegisterPrefix(RegName);
302 O << RegName << ", ";
303 printOperand(MI, OpNo, O);
306 case 'U': // Print 'u' for update form.
307 case 'X': // Print 'x' for indexed form.
309 // FIXME: Currently for PowerPC memory operands are always loaded
310 // into a register, so we never get an update or indexed form.
311 // This is bad even for offset forms, since even if we know we
312 // have a value in -16(r1), we will generate a load into r<n>
313 // and then load from 0(r<n>). Until that issue is fixed,
314 // tolerate 'U' and 'X' but don't output anything.
315 assert(MI->getOperand(OpNo).isReg());
321 assert(MI->getOperand(OpNo).isReg());
323 printOperand(MI, OpNo, O);
328 /// lookUpOrCreateTOCEntry -- Given a symbol, look up whether a TOC entry
329 /// exists for it. If not, create one. Then return a symbol that references
331 MCSymbol *PPCAsmPrinter::lookUpOrCreateTOCEntry(MCSymbol *Sym) {
332 MCSymbol *&TOCEntry = TOC[Sym];
334 TOCEntry = createTempSymbol("C");
338 void PPCAsmPrinter::EmitEndOfAsmFile(Module &M) {
342 void PPCAsmPrinter::LowerSTACKMAP(StackMaps &SM, const MachineInstr &MI) {
343 unsigned NumNOPBytes = MI.getOperand(1).getImm();
345 SM.recordStackMap(MI);
346 assert(NumNOPBytes % 4 == 0 && "Invalid number of NOP bytes requested!");
348 // Scan ahead to trim the shadow.
349 const MachineBasicBlock &MBB = *MI.getParent();
350 MachineBasicBlock::const_iterator MII(MI);
352 while (NumNOPBytes > 0) {
353 if (MII == MBB.end() || MII->isCall() ||
354 MII->getOpcode() == PPC::DBG_VALUE ||
355 MII->getOpcode() == TargetOpcode::PATCHPOINT ||
356 MII->getOpcode() == TargetOpcode::STACKMAP)
363 for (unsigned i = 0; i < NumNOPBytes; i += 4)
364 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::NOP));
367 // Lower a patchpoint of the form:
368 // [<def>], <id>, <numBytes>, <target>, <numArgs>
369 void PPCAsmPrinter::LowerPATCHPOINT(StackMaps &SM, const MachineInstr &MI) {
370 SM.recordPatchPoint(MI);
371 PatchPointOpers Opers(&MI);
373 unsigned EncodedBytes = 0;
374 const MachineOperand &CalleeMO = Opers.getCallTarget();
376 if (CalleeMO.isImm()) {
377 int64_t CallTarget = CalleeMO.getImm();
379 assert((CallTarget & 0xFFFFFFFFFFFF) == CallTarget &&
380 "High 16 bits of call target should be zero.");
381 unsigned ScratchReg = MI.getOperand(Opers.getNextScratchIdx()).getReg();
383 // Materialize the jump address:
384 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::LI8)
386 .addImm((CallTarget >> 32) & 0xFFFF));
388 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::RLDIC)
391 .addImm(32).addImm(16));
393 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ORIS8)
396 .addImm((CallTarget >> 16) & 0xFFFF));
398 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ORI8)
401 .addImm(CallTarget & 0xFFFF));
403 // Save the current TOC pointer before the remote call.
404 int TOCSaveOffset = Subtarget->getFrameLowering()->getTOCSaveOffset();
405 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::STD)
407 .addImm(TOCSaveOffset)
411 // If we're on ELFv1, then we need to load the actual function pointer
412 // from the function descriptor.
413 if (!Subtarget->isELFv2ABI()) {
414 // Load the new TOC pointer and the function address, but not r11
415 // (needing this is rare, and loading it here would prevent passing it
416 // via a 'nest' parameter.
417 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::LD)
420 .addReg(ScratchReg));
422 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::LD)
425 .addReg(ScratchReg));
429 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::MTCTR8)
430 .addReg(ScratchReg));
432 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::BCTRL8));
435 // Restore the TOC pointer after the call.
436 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::LD)
438 .addImm(TOCSaveOffset)
442 } else if (CalleeMO.isGlobal()) {
443 const GlobalValue *GValue = CalleeMO.getGlobal();
444 MCSymbol *MOSymbol = getSymbol(GValue);
445 const MCExpr *SymVar = MCSymbolRefExpr::create(MOSymbol, OutContext);
447 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::BL8_NOP)
452 // Each instruction is 4 bytes.
456 unsigned NumBytes = Opers.getNumPatchBytes();
457 assert(NumBytes >= EncodedBytes &&
458 "Patchpoint can't request size less than the length of a call.");
459 assert((NumBytes - EncodedBytes) % 4 == 0 &&
460 "Invalid number of NOP bytes requested!");
461 for (unsigned i = EncodedBytes; i < NumBytes; i += 4)
462 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::NOP));
465 /// EmitTlsCall -- Given a GETtls[ld]ADDR[32] instruction, print a
466 /// call to __tls_get_addr to the current output stream.
467 void PPCAsmPrinter::EmitTlsCall(const MachineInstr *MI,
468 MCSymbolRefExpr::VariantKind VK) {
469 StringRef Name = "__tls_get_addr";
470 MCSymbol *TlsGetAddr = OutContext.getOrCreateSymbol(Name);
471 MCSymbolRefExpr::VariantKind Kind = MCSymbolRefExpr::VK_None;
472 const Module *M = MF->getFunction().getParent();
474 assert(MI->getOperand(0).isReg() &&
475 ((Subtarget->isPPC64() && MI->getOperand(0).getReg() == PPC::X3) ||
476 (!Subtarget->isPPC64() && MI->getOperand(0).getReg() == PPC::R3)) &&
477 "GETtls[ld]ADDR[32] must define GPR3");
478 assert(MI->getOperand(1).isReg() &&
479 ((Subtarget->isPPC64() && MI->getOperand(1).getReg() == PPC::X3) ||
480 (!Subtarget->isPPC64() && MI->getOperand(1).getReg() == PPC::R3)) &&
481 "GETtls[ld]ADDR[32] must read GPR3");
483 if (!Subtarget->isPPC64() && !Subtarget->isDarwin() &&
484 isPositionIndependent())
485 Kind = MCSymbolRefExpr::VK_PLT;
486 const MCExpr *TlsRef =
487 MCSymbolRefExpr::create(TlsGetAddr, Kind, OutContext);
489 // Add 32768 offset to the symbol so we follow up the latest GOT/PLT ABI.
490 if (Kind == MCSymbolRefExpr::VK_PLT && Subtarget->isSecurePlt() &&
491 M->getPICLevel() == PICLevel::BigPIC)
492 TlsRef = MCBinaryExpr::createAdd(
493 TlsRef, MCConstantExpr::create(32768, OutContext), OutContext);
494 const MachineOperand &MO = MI->getOperand(2);
495 const GlobalValue *GValue = MO.getGlobal();
496 MCSymbol *MOSymbol = getSymbol(GValue);
497 const MCExpr *SymVar = MCSymbolRefExpr::create(MOSymbol, VK, OutContext);
498 EmitToStreamer(*OutStreamer,
499 MCInstBuilder(Subtarget->isPPC64() ?
500 PPC::BL8_NOP_TLS : PPC::BL_TLS)
505 /// EmitInstruction -- Print out a single PowerPC MI in Darwin syntax to
506 /// the current output stream.
508 void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
510 bool isPPC64 = Subtarget->isPPC64();
511 bool isDarwin = TM.getTargetTriple().isOSDarwin();
512 const Module *M = MF->getFunction().getParent();
513 PICLevel::Level PL = M->getPICLevel();
516 // Validate that SPE and FPU are mutually exclusive in codegen
517 if (!MI->isInlineAsm()) {
518 for (const MachineOperand &MO: MI->operands()) {
520 unsigned Reg = MO.getReg();
521 if (Subtarget->hasSPE()) {
522 if (PPC::F4RCRegClass.contains(Reg) ||
523 PPC::F8RCRegClass.contains(Reg) ||
524 PPC::QBRCRegClass.contains(Reg) ||
525 PPC::QFRCRegClass.contains(Reg) ||
526 PPC::QSRCRegClass.contains(Reg) ||
527 PPC::VFRCRegClass.contains(Reg) ||
528 PPC::VRRCRegClass.contains(Reg) ||
529 PPC::VSFRCRegClass.contains(Reg) ||
530 PPC::VSSRCRegClass.contains(Reg)
532 llvm_unreachable("SPE targets cannot have FPRegs!");
534 if (PPC::SPERCRegClass.contains(Reg))
535 llvm_unreachable("SPE register found in FPU-targeted code!");
541 // Lower multi-instruction pseudo operations.
542 switch (MI->getOpcode()) {
544 case TargetOpcode::DBG_VALUE:
545 llvm_unreachable("Should be handled target independently");
546 case TargetOpcode::STACKMAP:
547 return LowerSTACKMAP(SM, *MI);
548 case TargetOpcode::PATCHPOINT:
549 return LowerPATCHPOINT(SM, *MI);
551 case PPC::MoveGOTtoLR: {
552 // Transform %lr = MoveGOTtoLR
553 // Into this: bl _GLOBAL_OFFSET_TABLE_@local-4
554 // _GLOBAL_OFFSET_TABLE_@local-4 (instruction preceding
555 // _GLOBAL_OFFSET_TABLE_) has exactly one instruction:
557 // This will return the pointer to _GLOBAL_OFFSET_TABLE_@local
558 MCSymbol *GOTSymbol =
559 OutContext.getOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
560 const MCExpr *OffsExpr =
561 MCBinaryExpr::createSub(MCSymbolRefExpr::create(GOTSymbol,
562 MCSymbolRefExpr::VK_PPC_LOCAL,
564 MCConstantExpr::create(4, OutContext),
568 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::BL).addExpr(OffsExpr));
571 case PPC::MovePCtoLR:
572 case PPC::MovePCtoLR8: {
573 // Transform %lr = MovePCtoLR
574 // Into this, where the label is the PIC base:
577 MCSymbol *PICBase = MF->getPICBaseSymbol();
580 EmitToStreamer(*OutStreamer,
581 MCInstBuilder(PPC::BL)
582 // FIXME: We would like an efficient form for this, so we
583 // don't have to do a lot of extra uniquing.
584 .addExpr(MCSymbolRefExpr::create(PICBase, OutContext)));
587 OutStreamer->EmitLabel(PICBase);
590 case PPC::UpdateGBR: {
591 // Transform %rd = UpdateGBR(%rt, %ri)
592 // Into: lwz %rt, .L0$poff - .L0$pb(%ri)
594 // or into (if secure plt mode is on):
595 // addis r30, r30, {.LTOC,_GLOBAL_OFFSET_TABLE} - .L0$pb@ha
596 // addi r30, r30, {.LTOC,_GLOBAL_OFFSET_TABLE} - .L0$pb@l
597 // Get the offset from the GOT Base Register to the GOT
598 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
599 if (Subtarget->isSecurePlt() && isPositionIndependent() ) {
600 unsigned PICR = TmpInst.getOperand(0).getReg();
601 MCSymbol *BaseSymbol = OutContext.getOrCreateSymbol(
602 M->getPICLevel() == PICLevel::SmallPIC ? "_GLOBAL_OFFSET_TABLE_"
605 MCSymbolRefExpr::create(MF->getPICBaseSymbol(), OutContext);
607 const MCExpr *DeltaExpr = MCBinaryExpr::createSub(
608 MCSymbolRefExpr::create(BaseSymbol, OutContext), PB, OutContext);
610 const MCExpr *DeltaHi = PPCMCExpr::createHa(DeltaExpr, false, OutContext);
613 MCInstBuilder(PPC::ADDIS).addReg(PICR).addReg(PICR).addExpr(DeltaHi));
615 const MCExpr *DeltaLo = PPCMCExpr::createLo(DeltaExpr, false, OutContext);
618 MCInstBuilder(PPC::ADDI).addReg(PICR).addReg(PICR).addExpr(DeltaLo));
621 MCSymbol *PICOffset =
622 MF->getInfo<PPCFunctionInfo>()->getPICOffsetSymbol();
623 TmpInst.setOpcode(PPC::LWZ);
625 MCSymbolRefExpr::create(PICOffset, MCSymbolRefExpr::VK_None, OutContext);
627 MCSymbolRefExpr::create(MF->getPICBaseSymbol(),
628 MCSymbolRefExpr::VK_None,
630 const MCOperand TR = TmpInst.getOperand(1);
631 const MCOperand PICR = TmpInst.getOperand(0);
633 // Step 1: lwz %rt, .L$poff - .L$pb(%ri)
634 TmpInst.getOperand(1) =
635 MCOperand::createExpr(MCBinaryExpr::createSub(Exp, PB, OutContext));
636 TmpInst.getOperand(0) = TR;
637 TmpInst.getOperand(2) = PICR;
638 EmitToStreamer(*OutStreamer, TmpInst);
640 TmpInst.setOpcode(PPC::ADD4);
641 TmpInst.getOperand(0) = PICR;
642 TmpInst.getOperand(1) = TR;
643 TmpInst.getOperand(2) = PICR;
644 EmitToStreamer(*OutStreamer, TmpInst);
649 // Transform %r3 = LWZtoc @min1, %r2
650 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
652 // Change the opcode to LWZ, and the global address operand to be a
653 // reference to the GOT entry we will synthesize later.
654 TmpInst.setOpcode(PPC::LWZ);
655 const MachineOperand &MO = MI->getOperand(1);
657 // Map symbol -> label of TOC entry
658 assert(MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isBlockAddress());
659 MCSymbol *MOSymbol = nullptr;
661 MOSymbol = getSymbol(MO.getGlobal());
663 MOSymbol = GetCPISymbol(MO.getIndex());
665 MOSymbol = GetJTISymbol(MO.getIndex());
666 else if (MO.isBlockAddress())
667 MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
669 if (PL == PICLevel::SmallPIC) {
671 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_GOT,
673 TmpInst.getOperand(1) = MCOperand::createExpr(Exp);
675 MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
678 MCSymbolRefExpr::create(TOCEntry, MCSymbolRefExpr::VK_None,
681 MCSymbolRefExpr::create(OutContext.getOrCreateSymbol(Twine(".LTOC")),
683 Exp = MCBinaryExpr::createSub(Exp, PB, OutContext);
684 TmpInst.getOperand(1) = MCOperand::createExpr(Exp);
686 EmitToStreamer(*OutStreamer, TmpInst);
693 // Transform %x3 = LDtoc @min1, %x2
694 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
696 // Change the opcode to LD, and the global address operand to be a
697 // reference to the TOC entry we will synthesize later.
698 TmpInst.setOpcode(PPC::LD);
699 const MachineOperand &MO = MI->getOperand(1);
701 // Map symbol -> label of TOC entry
702 assert(MO.isGlobal() || MO.isCPI() || MO.isJTI() || MO.isBlockAddress());
703 MCSymbol *MOSymbol = nullptr;
705 MOSymbol = getSymbol(MO.getGlobal());
707 MOSymbol = GetCPISymbol(MO.getIndex());
709 MOSymbol = GetJTISymbol(MO.getIndex());
710 else if (MO.isBlockAddress())
711 MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
713 MCSymbol *TOCEntry = lookUpOrCreateTOCEntry(MOSymbol);
716 MCSymbolRefExpr::create(TOCEntry, MCSymbolRefExpr::VK_PPC_TOC,
718 TmpInst.getOperand(1) = MCOperand::createExpr(Exp);
719 EmitToStreamer(*OutStreamer, TmpInst);
723 case PPC::ADDIStocHA: {
724 // Transform %xd = ADDIStocHA %x2, @sym
725 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
727 // Change the opcode to ADDIS8. If the global address is external, has
728 // common linkage, is a non-local function address, or is a jump table
729 // address, then generate a TOC entry and reference that. Otherwise
730 // reference the symbol directly.
731 TmpInst.setOpcode(PPC::ADDIS8);
732 const MachineOperand &MO = MI->getOperand(2);
733 assert((MO.isGlobal() || MO.isCPI() || MO.isJTI() ||
734 MO.isBlockAddress()) &&
735 "Invalid operand for ADDIStocHA!");
736 MCSymbol *MOSymbol = nullptr;
737 bool GlobalToc = false;
740 const GlobalValue *GV = MO.getGlobal();
741 MOSymbol = getSymbol(GV);
742 unsigned char GVFlags = Subtarget->classifyGlobalReference(GV);
743 GlobalToc = (GVFlags & PPCII::MO_NLP_FLAG);
744 } else if (MO.isCPI()) {
745 MOSymbol = GetCPISymbol(MO.getIndex());
746 } else if (MO.isJTI()) {
747 MOSymbol = GetJTISymbol(MO.getIndex());
748 } else if (MO.isBlockAddress()) {
749 MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
752 if (GlobalToc || MO.isJTI() || MO.isBlockAddress() ||
753 TM.getCodeModel() == CodeModel::Large)
754 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
757 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_HA,
760 if (!MO.isJTI() && MO.getOffset())
761 Exp = MCBinaryExpr::createAdd(Exp,
762 MCConstantExpr::create(MO.getOffset(),
766 TmpInst.getOperand(2) = MCOperand::createExpr(Exp);
767 EmitToStreamer(*OutStreamer, TmpInst);
771 // Transform %xd = LDtocL @sym, %xs
772 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
774 // Change the opcode to LD. If the global address is external, has
775 // common linkage, or is a jump table address, then reference the
776 // associated TOC entry. Otherwise reference the symbol directly.
777 TmpInst.setOpcode(PPC::LD);
778 const MachineOperand &MO = MI->getOperand(1);
779 assert((MO.isGlobal() || MO.isCPI() || MO.isJTI() ||
780 MO.isBlockAddress()) &&
781 "Invalid operand for LDtocL!");
782 MCSymbol *MOSymbol = nullptr;
785 MOSymbol = lookUpOrCreateTOCEntry(GetJTISymbol(MO.getIndex()));
786 else if (MO.isBlockAddress()) {
787 MOSymbol = GetBlockAddressSymbol(MO.getBlockAddress());
788 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
790 else if (MO.isCPI()) {
791 MOSymbol = GetCPISymbol(MO.getIndex());
792 if (TM.getCodeModel() == CodeModel::Large)
793 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
795 else if (MO.isGlobal()) {
796 const GlobalValue *GV = MO.getGlobal();
797 MOSymbol = getSymbol(GV);
799 unsigned char GVFlags = Subtarget->classifyGlobalReference(GV);
800 assert((GVFlags & PPCII::MO_NLP_FLAG) &&
801 "LDtocL used on symbol that could be accessed directly is "
802 "invalid. Must match ADDIStocHA."));
803 MOSymbol = lookUpOrCreateTOCEntry(MOSymbol);
807 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_LO,
809 TmpInst.getOperand(1) = MCOperand::createExpr(Exp);
810 EmitToStreamer(*OutStreamer, TmpInst);
813 case PPC::ADDItocL: {
814 // Transform %xd = ADDItocL %xs, @sym
815 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
817 // Change the opcode to ADDI8. If the global address is external, then
818 // generate a TOC entry and reference that. Otherwise reference the
820 TmpInst.setOpcode(PPC::ADDI8);
821 const MachineOperand &MO = MI->getOperand(2);
822 assert((MO.isGlobal() || MO.isCPI()) && "Invalid operand for ADDItocL");
823 MCSymbol *MOSymbol = nullptr;
826 const GlobalValue *GV = MO.getGlobal();
827 LLVM_DEBUG(unsigned char GVFlags = Subtarget->classifyGlobalReference(GV);
828 assert(!(GVFlags & PPCII::MO_NLP_FLAG) &&
829 "Interposable definitions must use indirect access."));
830 MOSymbol = getSymbol(GV);
831 } else if (MO.isCPI()) {
832 MOSymbol = GetCPISymbol(MO.getIndex());
836 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_PPC_TOC_LO,
838 TmpInst.getOperand(2) = MCOperand::createExpr(Exp);
839 EmitToStreamer(*OutStreamer, TmpInst);
842 case PPC::ADDISgotTprelHA: {
843 // Transform: %xd = ADDISgotTprelHA %x2, @sym
844 // Into: %xd = ADDIS8 %x2, sym@got@tlsgd@ha
845 assert(Subtarget->isPPC64() && "Not supported for 32-bit PowerPC");
846 const MachineOperand &MO = MI->getOperand(2);
847 const GlobalValue *GValue = MO.getGlobal();
848 MCSymbol *MOSymbol = getSymbol(GValue);
849 const MCExpr *SymGotTprel =
850 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TPREL_HA,
852 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ADDIS8)
853 .addReg(MI->getOperand(0).getReg())
854 .addReg(MI->getOperand(1).getReg())
855 .addExpr(SymGotTprel));
858 case PPC::LDgotTprelL:
859 case PPC::LDgotTprelL32: {
860 // Transform %xd = LDgotTprelL @sym, %xs
861 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
863 // Change the opcode to LD.
864 TmpInst.setOpcode(isPPC64 ? PPC::LD : PPC::LWZ);
865 const MachineOperand &MO = MI->getOperand(1);
866 const GlobalValue *GValue = MO.getGlobal();
867 MCSymbol *MOSymbol = getSymbol(GValue);
869 MCSymbolRefExpr::create(MOSymbol,
870 isPPC64 ? MCSymbolRefExpr::VK_PPC_GOT_TPREL_LO
871 : MCSymbolRefExpr::VK_PPC_GOT_TPREL,
873 TmpInst.getOperand(1) = MCOperand::createExpr(Exp);
874 EmitToStreamer(*OutStreamer, TmpInst);
878 case PPC::PPC32PICGOT: {
879 MCSymbol *GOTSymbol = OutContext.getOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
880 MCSymbol *GOTRef = OutContext.createTempSymbol();
881 MCSymbol *NextInstr = OutContext.createTempSymbol();
883 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::BL)
884 // FIXME: We would like an efficient form for this, so we don't have to do
885 // a lot of extra uniquing.
886 .addExpr(MCSymbolRefExpr::create(NextInstr, OutContext)));
887 const MCExpr *OffsExpr =
888 MCBinaryExpr::createSub(MCSymbolRefExpr::create(GOTSymbol, OutContext),
889 MCSymbolRefExpr::create(GOTRef, OutContext),
891 OutStreamer->EmitLabel(GOTRef);
892 OutStreamer->EmitValue(OffsExpr, 4);
893 OutStreamer->EmitLabel(NextInstr);
894 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::MFLR)
895 .addReg(MI->getOperand(0).getReg()));
896 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::LWZ)
897 .addReg(MI->getOperand(1).getReg())
899 .addReg(MI->getOperand(0).getReg()));
900 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ADD4)
901 .addReg(MI->getOperand(0).getReg())
902 .addReg(MI->getOperand(1).getReg())
903 .addReg(MI->getOperand(0).getReg()));
906 case PPC::PPC32GOT: {
907 MCSymbol *GOTSymbol =
908 OutContext.getOrCreateSymbol(StringRef("_GLOBAL_OFFSET_TABLE_"));
909 const MCExpr *SymGotTlsL = MCSymbolRefExpr::create(
910 GOTSymbol, MCSymbolRefExpr::VK_PPC_LO, OutContext);
911 const MCExpr *SymGotTlsHA = MCSymbolRefExpr::create(
912 GOTSymbol, MCSymbolRefExpr::VK_PPC_HA, OutContext);
913 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::LI)
914 .addReg(MI->getOperand(0).getReg())
915 .addExpr(SymGotTlsL));
916 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ADDIS)
917 .addReg(MI->getOperand(0).getReg())
918 .addReg(MI->getOperand(0).getReg())
919 .addExpr(SymGotTlsHA));
922 case PPC::ADDIStlsgdHA: {
923 // Transform: %xd = ADDIStlsgdHA %x2, @sym
924 // Into: %xd = ADDIS8 %x2, sym@got@tlsgd@ha
925 assert(Subtarget->isPPC64() && "Not supported for 32-bit PowerPC");
926 const MachineOperand &MO = MI->getOperand(2);
927 const GlobalValue *GValue = MO.getGlobal();
928 MCSymbol *MOSymbol = getSymbol(GValue);
929 const MCExpr *SymGotTlsGD =
930 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSGD_HA,
932 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ADDIS8)
933 .addReg(MI->getOperand(0).getReg())
934 .addReg(MI->getOperand(1).getReg())
935 .addExpr(SymGotTlsGD));
938 case PPC::ADDItlsgdL:
939 // Transform: %xd = ADDItlsgdL %xs, @sym
940 // Into: %xd = ADDI8 %xs, sym@got@tlsgd@l
941 case PPC::ADDItlsgdL32: {
942 // Transform: %rd = ADDItlsgdL32 %rs, @sym
943 // Into: %rd = ADDI %rs, sym@got@tlsgd
944 const MachineOperand &MO = MI->getOperand(2);
945 const GlobalValue *GValue = MO.getGlobal();
946 MCSymbol *MOSymbol = getSymbol(GValue);
947 const MCExpr *SymGotTlsGD = MCSymbolRefExpr::create(
948 MOSymbol, Subtarget->isPPC64() ? MCSymbolRefExpr::VK_PPC_GOT_TLSGD_LO
949 : MCSymbolRefExpr::VK_PPC_GOT_TLSGD,
951 EmitToStreamer(*OutStreamer,
952 MCInstBuilder(Subtarget->isPPC64() ? PPC::ADDI8 : PPC::ADDI)
953 .addReg(MI->getOperand(0).getReg())
954 .addReg(MI->getOperand(1).getReg())
955 .addExpr(SymGotTlsGD));
958 case PPC::GETtlsADDR:
959 // Transform: %x3 = GETtlsADDR %x3, @sym
960 // Into: BL8_NOP_TLS __tls_get_addr(sym at tlsgd)
961 case PPC::GETtlsADDR32: {
962 // Transform: %r3 = GETtlsADDR32 %r3, @sym
963 // Into: BL_TLS __tls_get_addr(sym at tlsgd)@PLT
964 EmitTlsCall(MI, MCSymbolRefExpr::VK_PPC_TLSGD);
967 case PPC::ADDIStlsldHA: {
968 // Transform: %xd = ADDIStlsldHA %x2, @sym
969 // Into: %xd = ADDIS8 %x2, sym@got@tlsld@ha
970 assert(Subtarget->isPPC64() && "Not supported for 32-bit PowerPC");
971 const MachineOperand &MO = MI->getOperand(2);
972 const GlobalValue *GValue = MO.getGlobal();
973 MCSymbol *MOSymbol = getSymbol(GValue);
974 const MCExpr *SymGotTlsLD =
975 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_PPC_GOT_TLSLD_HA,
977 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ADDIS8)
978 .addReg(MI->getOperand(0).getReg())
979 .addReg(MI->getOperand(1).getReg())
980 .addExpr(SymGotTlsLD));
983 case PPC::ADDItlsldL:
984 // Transform: %xd = ADDItlsldL %xs, @sym
985 // Into: %xd = ADDI8 %xs, sym@got@tlsld@l
986 case PPC::ADDItlsldL32: {
987 // Transform: %rd = ADDItlsldL32 %rs, @sym
988 // Into: %rd = ADDI %rs, sym@got@tlsld
989 const MachineOperand &MO = MI->getOperand(2);
990 const GlobalValue *GValue = MO.getGlobal();
991 MCSymbol *MOSymbol = getSymbol(GValue);
992 const MCExpr *SymGotTlsLD = MCSymbolRefExpr::create(
993 MOSymbol, Subtarget->isPPC64() ? MCSymbolRefExpr::VK_PPC_GOT_TLSLD_LO
994 : MCSymbolRefExpr::VK_PPC_GOT_TLSLD,
996 EmitToStreamer(*OutStreamer,
997 MCInstBuilder(Subtarget->isPPC64() ? PPC::ADDI8 : PPC::ADDI)
998 .addReg(MI->getOperand(0).getReg())
999 .addReg(MI->getOperand(1).getReg())
1000 .addExpr(SymGotTlsLD));
1003 case PPC::GETtlsldADDR:
1004 // Transform: %x3 = GETtlsldADDR %x3, @sym
1005 // Into: BL8_NOP_TLS __tls_get_addr(sym at tlsld)
1006 case PPC::GETtlsldADDR32: {
1007 // Transform: %r3 = GETtlsldADDR32 %r3, @sym
1008 // Into: BL_TLS __tls_get_addr(sym at tlsld)@PLT
1009 EmitTlsCall(MI, MCSymbolRefExpr::VK_PPC_TLSLD);
1012 case PPC::ADDISdtprelHA:
1013 // Transform: %xd = ADDISdtprelHA %xs, @sym
1014 // Into: %xd = ADDIS8 %xs, sym@dtprel@ha
1015 case PPC::ADDISdtprelHA32: {
1016 // Transform: %rd = ADDISdtprelHA32 %rs, @sym
1017 // Into: %rd = ADDIS %rs, sym@dtprel@ha
1018 const MachineOperand &MO = MI->getOperand(2);
1019 const GlobalValue *GValue = MO.getGlobal();
1020 MCSymbol *MOSymbol = getSymbol(GValue);
1021 const MCExpr *SymDtprel =
1022 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_HA,
1026 MCInstBuilder(Subtarget->isPPC64() ? PPC::ADDIS8 : PPC::ADDIS)
1027 .addReg(MI->getOperand(0).getReg())
1028 .addReg(MI->getOperand(1).getReg())
1029 .addExpr(SymDtprel));
1032 case PPC::ADDIdtprelL:
1033 // Transform: %xd = ADDIdtprelL %xs, @sym
1034 // Into: %xd = ADDI8 %xs, sym@dtprel@l
1035 case PPC::ADDIdtprelL32: {
1036 // Transform: %rd = ADDIdtprelL32 %rs, @sym
1037 // Into: %rd = ADDI %rs, sym@dtprel@l
1038 const MachineOperand &MO = MI->getOperand(2);
1039 const GlobalValue *GValue = MO.getGlobal();
1040 MCSymbol *MOSymbol = getSymbol(GValue);
1041 const MCExpr *SymDtprel =
1042 MCSymbolRefExpr::create(MOSymbol, MCSymbolRefExpr::VK_PPC_DTPREL_LO,
1044 EmitToStreamer(*OutStreamer,
1045 MCInstBuilder(Subtarget->isPPC64() ? PPC::ADDI8 : PPC::ADDI)
1046 .addReg(MI->getOperand(0).getReg())
1047 .addReg(MI->getOperand(1).getReg())
1048 .addExpr(SymDtprel));
1053 if (!Subtarget->hasMFOCRF()) {
1054 // Transform: %r3 = MFOCRF %cr7
1055 // Into: %r3 = MFCR ;; cr7
1056 unsigned NewOpcode =
1057 MI->getOpcode() == PPC::MFOCRF ? PPC::MFCR : PPC::MFCR8;
1058 OutStreamer->AddComment(PPCInstPrinter::
1059 getRegisterName(MI->getOperand(1).getReg()));
1060 EmitToStreamer(*OutStreamer, MCInstBuilder(NewOpcode)
1061 .addReg(MI->getOperand(0).getReg()));
1067 if (!Subtarget->hasMFOCRF()) {
1068 // Transform: %cr7 = MTOCRF %r3
1069 // Into: MTCRF mask, %r3 ;; cr7
1070 unsigned NewOpcode =
1071 MI->getOpcode() == PPC::MTOCRF ? PPC::MTCRF : PPC::MTCRF8;
1072 unsigned Mask = 0x80 >> OutContext.getRegisterInfo()
1073 ->getEncodingValue(MI->getOperand(0).getReg());
1074 OutStreamer->AddComment(PPCInstPrinter::
1075 getRegisterName(MI->getOperand(0).getReg()));
1076 EmitToStreamer(*OutStreamer, MCInstBuilder(NewOpcode)
1078 .addReg(MI->getOperand(1).getReg()));
1086 // Verify alignment is legal, so we don't create relocations
1087 // that can't be supported.
1088 // FIXME: This test is currently disabled for Darwin. The test
1089 // suite shows a handful of test cases that fail this check for
1090 // Darwin. Those need to be investigated before this sanity test
1091 // can be enabled for those subtargets.
1092 if (!Subtarget->isDarwin()) {
1093 unsigned OpNum = (MI->getOpcode() == PPC::STD) ? 2 : 1;
1094 const MachineOperand &MO = MI->getOperand(OpNum);
1095 if (MO.isGlobal() && MO.getGlobal()->getAlignment() < 4)
1096 llvm_unreachable("Global must be word-aligned for LD, STD, LWA!");
1098 // Now process the instruction normally.
1103 LowerPPCMachineInstrToMCInst(MI, TmpInst, *this, isDarwin);
1104 EmitToStreamer(*OutStreamer, TmpInst);
1107 void PPCLinuxAsmPrinter::EmitInstruction(const MachineInstr *MI) {
1108 if (!Subtarget->isPPC64())
1109 return PPCAsmPrinter::EmitInstruction(MI);
1111 switch (MI->getOpcode()) {
1113 return PPCAsmPrinter::EmitInstruction(MI);
1114 case TargetOpcode::PATCHABLE_FUNCTION_ENTER: {
1116 // b .end # lis 0, FuncId[16..32]
1117 // nop # li 0, FuncId[0..15]
1120 // bl __xray_FunctionEntry
1124 // Update compiler-rt/lib/xray/xray_powerpc64.cc accordingly when number
1125 // of instructions change.
1126 MCSymbol *BeginOfSled = OutContext.createTempSymbol();
1127 MCSymbol *EndOfSled = OutContext.createTempSymbol();
1128 OutStreamer->EmitLabel(BeginOfSled);
1129 EmitToStreamer(*OutStreamer,
1130 MCInstBuilder(PPC::B).addExpr(
1131 MCSymbolRefExpr::create(EndOfSled, OutContext)));
1132 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::NOP));
1135 MCInstBuilder(PPC::STD).addReg(PPC::X0).addImm(-8).addReg(PPC::X1));
1136 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::MFLR8).addReg(PPC::X0));
1137 EmitToStreamer(*OutStreamer,
1138 MCInstBuilder(PPC::BL8_NOP)
1139 .addExpr(MCSymbolRefExpr::create(
1140 OutContext.getOrCreateSymbol("__xray_FunctionEntry"),
1142 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::MTLR8).addReg(PPC::X0));
1143 OutStreamer->EmitLabel(EndOfSled);
1144 recordSled(BeginOfSled, *MI, SledKind::FUNCTION_ENTER);
1147 case TargetOpcode::PATCHABLE_RET: {
1148 unsigned RetOpcode = MI->getOperand(0).getImm();
1150 RetInst.setOpcode(RetOpcode);
1151 for (const auto &MO :
1152 make_range(std::next(MI->operands_begin()), MI->operands_end())) {
1154 if (LowerPPCMachineOperandToMCOperand(MO, MCOp, *this, false))
1155 RetInst.addOperand(MCOp);
1159 if (RetOpcode == PPC::BCCLR) {
1160 IsConditional = true;
1161 } else if (RetOpcode == PPC::TCRETURNdi8 || RetOpcode == PPC::TCRETURNri8 ||
1162 RetOpcode == PPC::TCRETURNai8) {
1164 } else if (RetOpcode == PPC::BLR8 || RetOpcode == PPC::TAILB8) {
1165 IsConditional = false;
1167 EmitToStreamer(*OutStreamer, RetInst);
1171 MCSymbol *FallthroughLabel;
1172 if (IsConditional) {
1180 // blr # lis 0, FuncId[16..32]
1181 // nop # li 0, FuncId[0..15]
1184 // bl __xray_FunctionExit
1189 // Update compiler-rt/lib/xray/xray_powerpc64.cc accordingly when number
1190 // of instructions change.
1191 FallthroughLabel = OutContext.createTempSymbol();
1194 MCInstBuilder(PPC::BCC)
1195 .addImm(PPC::InvertPredicate(
1196 static_cast<PPC::Predicate>(MI->getOperand(1).getImm())))
1197 .addReg(MI->getOperand(2).getReg())
1198 .addExpr(MCSymbolRefExpr::create(FallthroughLabel, OutContext)));
1200 RetInst.setOpcode(PPC::BLR8);
1204 // b(lr)? # lis 0, FuncId[16..32]
1205 // nop # li 0, FuncId[0..15]
1208 // bl __xray_FunctionExit
1212 // Update compiler-rt/lib/xray/xray_powerpc64.cc accordingly when number
1213 // of instructions change.
1214 OutStreamer->EmitCodeAlignment(8);
1215 MCSymbol *BeginOfSled = OutContext.createTempSymbol();
1216 OutStreamer->EmitLabel(BeginOfSled);
1217 EmitToStreamer(*OutStreamer, RetInst);
1218 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::NOP));
1221 MCInstBuilder(PPC::STD).addReg(PPC::X0).addImm(-8).addReg(PPC::X1));
1222 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::MFLR8).addReg(PPC::X0));
1223 EmitToStreamer(*OutStreamer,
1224 MCInstBuilder(PPC::BL8_NOP)
1225 .addExpr(MCSymbolRefExpr::create(
1226 OutContext.getOrCreateSymbol("__xray_FunctionExit"),
1228 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::MTLR8).addReg(PPC::X0));
1229 EmitToStreamer(*OutStreamer, RetInst);
1231 OutStreamer->EmitLabel(FallthroughLabel);
1232 recordSled(BeginOfSled, *MI, SledKind::FUNCTION_EXIT);
1235 case TargetOpcode::PATCHABLE_FUNCTION_EXIT:
1236 llvm_unreachable("PATCHABLE_FUNCTION_EXIT should never be emitted");
1237 case TargetOpcode::PATCHABLE_TAIL_CALL:
1238 // TODO: Define a trampoline `__xray_FunctionTailExit` and differentiate a
1239 // normal function exit from a tail exit.
1240 llvm_unreachable("Tail call is handled in the normal case. See comments "
1241 "around this assert.");
1245 void PPCLinuxAsmPrinter::EmitStartOfAsmFile(Module &M) {
1246 if (static_cast<const PPCTargetMachine &>(TM).isELFv2ABI()) {
1247 PPCTargetStreamer *TS =
1248 static_cast<PPCTargetStreamer *>(OutStreamer->getTargetStreamer());
1251 TS->emitAbiVersion(2);
1254 if (static_cast<const PPCTargetMachine &>(TM).isPPC64() ||
1255 !isPositionIndependent())
1256 return AsmPrinter::EmitStartOfAsmFile(M);
1258 if (M.getPICLevel() == PICLevel::SmallPIC)
1259 return AsmPrinter::EmitStartOfAsmFile(M);
1261 OutStreamer->SwitchSection(OutContext.getELFSection(
1262 ".got2", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC));
1264 MCSymbol *TOCSym = OutContext.getOrCreateSymbol(Twine(".LTOC"));
1265 MCSymbol *CurrentPos = OutContext.createTempSymbol();
1267 OutStreamer->EmitLabel(CurrentPos);
1269 // The GOT pointer points to the middle of the GOT, in order to reference the
1270 // entire 64kB range. 0x8000 is the midpoint.
1271 const MCExpr *tocExpr =
1272 MCBinaryExpr::createAdd(MCSymbolRefExpr::create(CurrentPos, OutContext),
1273 MCConstantExpr::create(0x8000, OutContext),
1276 OutStreamer->EmitAssignment(TOCSym, tocExpr);
1278 OutStreamer->SwitchSection(getObjFileLowering().getTextSection());
1281 void PPCLinuxAsmPrinter::EmitFunctionEntryLabel() {
1282 // linux/ppc32 - Normal entry label.
1283 if (!Subtarget->isPPC64() &&
1284 (!isPositionIndependent() ||
1285 MF->getFunction().getParent()->getPICLevel() == PICLevel::SmallPIC))
1286 return AsmPrinter::EmitFunctionEntryLabel();
1288 if (!Subtarget->isPPC64()) {
1289 const PPCFunctionInfo *PPCFI = MF->getInfo<PPCFunctionInfo>();
1290 if (PPCFI->usesPICBase() && !Subtarget->isSecurePlt()) {
1291 MCSymbol *RelocSymbol = PPCFI->getPICOffsetSymbol();
1292 MCSymbol *PICBase = MF->getPICBaseSymbol();
1293 OutStreamer->EmitLabel(RelocSymbol);
1295 const MCExpr *OffsExpr =
1296 MCBinaryExpr::createSub(
1297 MCSymbolRefExpr::create(OutContext.getOrCreateSymbol(Twine(".LTOC")),
1299 MCSymbolRefExpr::create(PICBase, OutContext),
1301 OutStreamer->EmitValue(OffsExpr, 4);
1302 OutStreamer->EmitLabel(CurrentFnSym);
1305 return AsmPrinter::EmitFunctionEntryLabel();
1308 // ELFv2 ABI - Normal entry label.
1309 if (Subtarget->isELFv2ABI()) {
1310 // In the Large code model, we allow arbitrary displacements between
1311 // the text section and its associated TOC section. We place the
1312 // full 8-byte offset to the TOC in memory immediately preceding
1313 // the function global entry point.
1314 if (TM.getCodeModel() == CodeModel::Large
1315 && !MF->getRegInfo().use_empty(PPC::X2)) {
1316 const PPCFunctionInfo *PPCFI = MF->getInfo<PPCFunctionInfo>();
1318 MCSymbol *TOCSymbol = OutContext.getOrCreateSymbol(StringRef(".TOC."));
1319 MCSymbol *GlobalEPSymbol = PPCFI->getGlobalEPSymbol();
1320 const MCExpr *TOCDeltaExpr =
1321 MCBinaryExpr::createSub(MCSymbolRefExpr::create(TOCSymbol, OutContext),
1322 MCSymbolRefExpr::create(GlobalEPSymbol,
1326 OutStreamer->EmitLabel(PPCFI->getTOCOffsetSymbol());
1327 OutStreamer->EmitValue(TOCDeltaExpr, 8);
1329 return AsmPrinter::EmitFunctionEntryLabel();
1332 // Emit an official procedure descriptor.
1333 MCSectionSubPair Current = OutStreamer->getCurrentSection();
1334 MCSectionELF *Section = OutStreamer->getContext().getELFSection(
1335 ".opd", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
1336 OutStreamer->SwitchSection(Section);
1337 OutStreamer->EmitLabel(CurrentFnSym);
1338 OutStreamer->EmitValueToAlignment(8);
1339 MCSymbol *Symbol1 = CurrentFnSymForSize;
1340 // Generates a R_PPC64_ADDR64 (from FK_DATA_8) relocation for the function
1342 OutStreamer->EmitValue(MCSymbolRefExpr::create(Symbol1, OutContext),
1344 MCSymbol *Symbol2 = OutContext.getOrCreateSymbol(StringRef(".TOC."));
1345 // Generates a R_PPC64_TOC relocation for TOC base insertion.
1346 OutStreamer->EmitValue(
1347 MCSymbolRefExpr::create(Symbol2, MCSymbolRefExpr::VK_PPC_TOCBASE, OutContext),
1349 // Emit a null environment pointer.
1350 OutStreamer->EmitIntValue(0, 8 /* size */);
1351 OutStreamer->SwitchSection(Current.first, Current.second);
1354 bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
1355 const DataLayout &DL = getDataLayout();
1357 bool isPPC64 = DL.getPointerSizeInBits() == 64;
1359 PPCTargetStreamer &TS =
1360 static_cast<PPCTargetStreamer &>(*OutStreamer->getTargetStreamer());
1363 MCSectionELF *Section;
1366 Section = OutStreamer->getContext().getELFSection(
1367 ".toc", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
1369 Section = OutStreamer->getContext().getELFSection(
1370 ".got2", ELF::SHT_PROGBITS, ELF::SHF_WRITE | ELF::SHF_ALLOC);
1371 OutStreamer->SwitchSection(Section);
1373 for (MapVector<MCSymbol*, MCSymbol*>::iterator I = TOC.begin(),
1374 E = TOC.end(); I != E; ++I) {
1375 OutStreamer->EmitLabel(I->second);
1376 MCSymbol *S = I->first;
1380 OutStreamer->EmitValueToAlignment(4);
1381 OutStreamer->EmitSymbolValue(S, 4);
1386 return AsmPrinter::doFinalization(M);
1389 /// EmitFunctionBodyStart - Emit a global entry point prefix for ELFv2.
1390 void PPCLinuxAsmPrinter::EmitFunctionBodyStart() {
1391 // In the ELFv2 ABI, in functions that use the TOC register, we need to
1392 // provide two entry points. The ABI guarantees that when calling the
1393 // local entry point, r2 is set up by the caller to contain the TOC base
1394 // for this function, and when calling the global entry point, r12 is set
1395 // up by the caller to hold the address of the global entry point. We
1396 // thus emit a prefix sequence along the following lines:
1400 // # global entry point
1401 // addis r2,r12,(.TOC.-.Lfunc_gepNN)@ha
1402 // addi r2,r2,(.TOC.-.Lfunc_gepNN)@l
1404 // .localentry func, .Lfunc_lepNN-.Lfunc_gepNN
1405 // # local entry point, followed by function body
1407 // For the Large code model, we create
1410 // .quad .TOC.-.Lfunc_gepNN # done by EmitFunctionEntryLabel
1413 // # global entry point
1414 // ld r2,.Lfunc_tocNN-.Lfunc_gepNN(r12)
1417 // .localentry func, .Lfunc_lepNN-.Lfunc_gepNN
1418 // # local entry point, followed by function body
1420 // This ensures we have r2 set up correctly while executing the function
1421 // body, no matter which entry point is called.
1422 if (Subtarget->isELFv2ABI()
1423 // Only do all that if the function uses r2 in the first place.
1424 && !MF->getRegInfo().use_empty(PPC::X2)) {
1425 // Note: The logic here must be synchronized with the code in the
1426 // branch-selection pass which sets the offset of the first block in the
1427 // function. This matters because it affects the alignment.
1428 const PPCFunctionInfo *PPCFI = MF->getInfo<PPCFunctionInfo>();
1430 MCSymbol *GlobalEntryLabel = PPCFI->getGlobalEPSymbol();
1431 OutStreamer->EmitLabel(GlobalEntryLabel);
1432 const MCSymbolRefExpr *GlobalEntryLabelExp =
1433 MCSymbolRefExpr::create(GlobalEntryLabel, OutContext);
1435 if (TM.getCodeModel() != CodeModel::Large) {
1436 MCSymbol *TOCSymbol = OutContext.getOrCreateSymbol(StringRef(".TOC."));
1437 const MCExpr *TOCDeltaExpr =
1438 MCBinaryExpr::createSub(MCSymbolRefExpr::create(TOCSymbol, OutContext),
1439 GlobalEntryLabelExp, OutContext);
1441 const MCExpr *TOCDeltaHi =
1442 PPCMCExpr::createHa(TOCDeltaExpr, false, OutContext);
1443 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ADDIS)
1446 .addExpr(TOCDeltaHi));
1448 const MCExpr *TOCDeltaLo =
1449 PPCMCExpr::createLo(TOCDeltaExpr, false, OutContext);
1450 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ADDI)
1453 .addExpr(TOCDeltaLo));
1455 MCSymbol *TOCOffset = PPCFI->getTOCOffsetSymbol();
1456 const MCExpr *TOCOffsetDeltaExpr =
1457 MCBinaryExpr::createSub(MCSymbolRefExpr::create(TOCOffset, OutContext),
1458 GlobalEntryLabelExp, OutContext);
1460 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::LD)
1462 .addExpr(TOCOffsetDeltaExpr)
1464 EmitToStreamer(*OutStreamer, MCInstBuilder(PPC::ADD8)
1470 MCSymbol *LocalEntryLabel = PPCFI->getLocalEPSymbol();
1471 OutStreamer->EmitLabel(LocalEntryLabel);
1472 const MCSymbolRefExpr *LocalEntryLabelExp =
1473 MCSymbolRefExpr::create(LocalEntryLabel, OutContext);
1474 const MCExpr *LocalOffsetExp =
1475 MCBinaryExpr::createSub(LocalEntryLabelExp,
1476 GlobalEntryLabelExp, OutContext);
1478 PPCTargetStreamer *TS =
1479 static_cast<PPCTargetStreamer *>(OutStreamer->getTargetStreamer());
1482 TS->emitLocalEntry(cast<MCSymbolELF>(CurrentFnSym), LocalOffsetExp);
1486 /// EmitFunctionBodyEnd - Print the traceback table before the .size
1489 void PPCLinuxAsmPrinter::EmitFunctionBodyEnd() {
1490 // Only the 64-bit target requires a traceback table. For now,
1491 // we only emit the word of zeroes that GDB requires to find
1492 // the end of the function, and zeroes for the eight-byte
1493 // mandatory fields.
1494 // FIXME: We should fill in the eight-byte mandatory fields as described in
1495 // the PPC64 ELF ABI (this is a low-priority item because GDB does not
1496 // currently make use of these fields).
1497 if (Subtarget->isPPC64()) {
1498 OutStreamer->EmitIntValue(0, 4/*size*/);
1499 OutStreamer->EmitIntValue(0, 8/*size*/);
1503 void PPCDarwinAsmPrinter::EmitStartOfAsmFile(Module &M) {
1504 static const char *const CPUDirectives[] = {
1525 // FIXME: why is power8 missing here?
1531 // Get the numerically largest directive.
1532 // FIXME: How should we merge darwin directives?
1533 unsigned Directive = PPC::DIR_NONE;
1534 for (const Function &F : M) {
1535 const PPCSubtarget &STI = TM.getSubtarget<PPCSubtarget>(F);
1536 unsigned FDir = STI.getDarwinDirective();
1537 Directive = Directive > FDir ? FDir : STI.getDarwinDirective();
1538 if (STI.hasMFOCRF() && Directive < PPC::DIR_970)
1539 Directive = PPC::DIR_970;
1540 if (STI.hasAltivec() && Directive < PPC::DIR_7400)
1541 Directive = PPC::DIR_7400;
1542 if (STI.isPPC64() && Directive < PPC::DIR_64)
1543 Directive = PPC::DIR_64;
1546 assert(Directive <= PPC::DIR_64 && "Directive out of range.");
1548 assert(Directive < array_lengthof(CPUDirectives) &&
1549 "CPUDirectives[] might not be up-to-date!");
1550 PPCTargetStreamer &TStreamer =
1551 *static_cast<PPCTargetStreamer *>(OutStreamer->getTargetStreamer());
1552 TStreamer.emitMachine(CPUDirectives[Directive]);
1554 // Prime text sections so they are adjacent. This reduces the likelihood a
1555 // large data or debug section causes a branch to exceed 16M limit.
1556 const TargetLoweringObjectFileMachO &TLOFMacho =
1557 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
1558 OutStreamer->SwitchSection(TLOFMacho.getTextCoalSection());
1559 if (TM.getRelocationModel() == Reloc::PIC_) {
1560 OutStreamer->SwitchSection(
1561 OutContext.getMachOSection("__TEXT", "__picsymbolstub1",
1562 MachO::S_SYMBOL_STUBS |
1563 MachO::S_ATTR_PURE_INSTRUCTIONS,
1564 32, SectionKind::getText()));
1565 } else if (TM.getRelocationModel() == Reloc::DynamicNoPIC) {
1566 OutStreamer->SwitchSection(
1567 OutContext.getMachOSection("__TEXT","__symbol_stub1",
1568 MachO::S_SYMBOL_STUBS |
1569 MachO::S_ATTR_PURE_INSTRUCTIONS,
1570 16, SectionKind::getText()));
1572 OutStreamer->SwitchSection(getObjFileLowering().getTextSection());
1575 bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
1576 bool isPPC64 = getDataLayout().getPointerSizeInBits() == 64;
1578 // Darwin/PPC always uses mach-o.
1579 const TargetLoweringObjectFileMachO &TLOFMacho =
1580 static_cast<const TargetLoweringObjectFileMachO &>(getObjFileLowering());
1582 MachineModuleInfoMachO &MMIMacho =
1583 MMI->getObjFileInfo<MachineModuleInfoMachO>();
1585 if (MAI->doesSupportExceptionHandling()) {
1586 // Add the (possibly multiple) personalities to the set of global values.
1587 // Only referenced functions get into the Personalities list.
1588 for (const Function *Personality : MMI->getPersonalities()) {
1591 getSymbolWithGlobalValueBase(Personality, "$non_lazy_ptr");
1592 MachineModuleInfoImpl::StubValueTy &StubSym =
1593 MMIMacho.getGVStubEntry(NLPSym);
1595 MachineModuleInfoImpl::StubValueTy(getSymbol(Personality), true);
1600 // Output stubs for dynamically-linked functions.
1601 MachineModuleInfoMachO::SymbolListTy Stubs = MMIMacho.GetGVStubList();
1603 // Output macho stubs for external and common global variables.
1604 if (!Stubs.empty()) {
1605 // Switch with ".non_lazy_symbol_pointer" directive.
1606 OutStreamer->SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
1607 EmitAlignment(isPPC64 ? 3 : 2);
1609 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
1611 OutStreamer->EmitLabel(Stubs[i].first);
1612 // .indirect_symbol _foo
1613 MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second;
1614 OutStreamer->EmitSymbolAttribute(MCSym.getPointer(),
1615 MCSA_IndirectSymbol);
1618 // External to current translation unit.
1619 OutStreamer->EmitIntValue(0, isPPC64 ? 8 : 4 /*size*/);
1621 // Internal to current translation unit.
1623 // When we place the LSDA into the TEXT section, the type info
1625 // need to be indirect and pc-rel. We accomplish this by using NLPs.
1626 // However, sometimes the types are local to the file. So we need to
1627 // fill in the value for the NLP in those cases.
1628 OutStreamer->EmitValue(
1629 MCSymbolRefExpr::create(MCSym.getPointer(), OutContext),
1630 isPPC64 ? 8 : 4 /*size*/);
1634 OutStreamer->AddBlankLine();
1638 // Funny Darwin hack: This flag tells the linker that no global symbols
1639 // contain code that falls through to other global symbols (e.g. the obvious
1640 // implementation of multiple entry points). If this doesn't occur, the
1641 // linker can safely perform dead code stripping. Since LLVM never generates
1642 // code that does this, it is always safe to set.
1643 OutStreamer->EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
1645 return AsmPrinter::doFinalization(M);
1648 /// createPPCAsmPrinterPass - Returns a pass that prints the PPC assembly code
1649 /// for a MachineFunction to the given output stream, in a format that the
1650 /// Darwin assembler can deal with.
1653 createPPCAsmPrinterPass(TargetMachine &tm,
1654 std::unique_ptr<MCStreamer> &&Streamer) {
1655 if (tm.getTargetTriple().isMacOSX())
1656 return new PPCDarwinAsmPrinter(tm, std::move(Streamer));
1657 if (tm.getTargetTriple().isOSAIX())
1658 return new PPCAIXAsmPrinter(tm, std::move(Streamer));
1660 return new PPCLinuxAsmPrinter(tm, std::move(Streamer));
1663 // Force static initialization.
1664 extern "C" void LLVMInitializePowerPCAsmPrinter() {
1665 TargetRegistry::RegisterAsmPrinter(getThePPC32Target(),
1666 createPPCAsmPrinterPass);
1667 TargetRegistry::RegisterAsmPrinter(getThePPC64Target(),
1668 createPPCAsmPrinterPass);
1669 TargetRegistry::RegisterAsmPrinter(getThePPC64LETarget(),
1670 createPPCAsmPrinterPass);