1 //===-- ARMAsmPrinter.h - ARM implementation of AsmPrinter ------*- C++ -*-===//
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 #ifndef LLVM_LIB_TARGET_ARM_ARMASMPRINTER_H
11 #define LLVM_LIB_TARGET_ARM_ARMASMPRINTER_H
13 #include "ARMSubtarget.h"
14 #include "llvm/CodeGen/AsmPrinter.h"
15 #include "llvm/Target/TargetMachine.h"
19 class ARMFunctionInfo;
21 class MachineConstantPool;
32 class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {
34 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can
35 /// make the right decision when printing asm code for different targets.
36 const ARMSubtarget *Subtarget;
38 /// AFI - Keep a pointer to ARMFunctionInfo for the current
42 /// MCP - Keep a pointer to constantpool entries of the current
44 const MachineConstantPool *MCP;
46 /// InConstantPool - Maintain state when emitting a sequence of constant
47 /// pool entries so we can properly mark them as data regions.
50 /// ThumbIndirectPads - These maintain a per-function list of jump pad
51 /// labels used for ARMv4t thumb code to make register indirect calls.
52 SmallVector<std::pair<unsigned, MCSymbol*>, 4> ThumbIndirectPads;
54 /// OptimizationGoals - Maintain a combined optimization goal for all
55 /// functions in a module: one of Tag_ABI_optimization_goals values,
56 /// -1 if uninitialized, 0 if conflicting goals
57 int OptimizationGoals;
59 /// List of globals that have had their storage promoted to a constant
60 /// pool. This lives between calls to runOnMachineFunction and collects
61 /// data from every MachineFunction. It is used during doFinalization
62 /// when all non-function globals are emitted.
63 SmallPtrSet<const GlobalVariable*,2> PromotedGlobals;
66 explicit ARMAsmPrinter(TargetMachine &TM,
67 std::unique_ptr<MCStreamer> Streamer);
69 const char *getPassName() const override {
70 return "ARM Assembly / Object Emitter";
73 void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O);
75 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
76 unsigned AsmVariant, const char *ExtraCode,
77 raw_ostream &O) override;
78 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
79 unsigned AsmVariant, const char *ExtraCode,
80 raw_ostream &O) override;
82 void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
83 const MCSubtargetInfo *EndInfo) const override;
85 void EmitJumpTableAddrs(const MachineInstr *MI);
86 void EmitJumpTableInsts(const MachineInstr *MI);
87 void EmitJumpTableTBInst(const MachineInstr *MI, unsigned OffsetWidth);
88 void EmitInstruction(const MachineInstr *MI) override;
89 bool runOnMachineFunction(MachineFunction &F) override;
91 void EmitConstantPool() override {
92 // we emit constant pools customly!
94 void EmitFunctionBodyEnd() override;
95 void EmitFunctionEntryLabel() override;
96 void EmitStartOfAsmFile(Module &M) override;
97 void EmitEndOfAsmFile(Module &M) override;
98 void EmitXXStructor(const DataLayout &DL, const Constant *CV) override;
99 void EmitGlobalVariable(const GlobalVariable *GV) override;
101 // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
102 bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
106 // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
107 void emitAttributes();
109 // Generic helper used to emit e.g. ARMv5 mul pseudos
110 void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc);
112 void EmitUnwindingInstruction(const MachineInstr *MI);
114 // emitPseudoExpansionLowering - tblgen'erated.
115 bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
116 const MachineInstr *MI);
119 unsigned getISAEncoding() override {
120 // ARM/Darwin adds ISA to the DWARF info for each function.
121 const Triple &TT = TM.getTargetTriple();
122 if (!TT.isOSBinFormatMachO())
124 bool isThumb = TT.getArch() == Triple::thumb ||
125 TT.getArch() == Triple::thumbeb ||
126 TT.getSubArch() == Triple::ARMSubArch_v7m ||
127 TT.getSubArch() == Triple::ARMSubArch_v6m;
128 return isThumb ? ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm;
132 MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol);
133 MCSymbol *GetARMJTIPICJumpTableLabel(unsigned uid) const;
135 MCSymbol *GetARMGVSymbol(const GlobalValue *GV, unsigned char TargetFlags);
138 /// EmitMachineConstantPoolValue - Print a machine constantpool value to
140 void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) override;
142 } // end namespace llvm