ARMAsmPrinter.h revision c89c744b69cecac576317a98322fd295e36e9886
1//===-- ARMAsmPrinter.h - Print machine code to an ARM .s file --*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// ARM Assembly printer class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef ARMASMPRINTER_H 15#define ARMASMPRINTER_H 16 17#include "ARM.h" 18#include "ARMTargetMachine.h" 19#include "llvm/CodeGen/AsmPrinter.h" 20#include "llvm/Support/Compiler.h" 21 22namespace llvm { 23 24class MCOperand; 25 26namespace ARM { 27 enum DW_ISA { 28 DW_ISA_ARM_thumb = 1, 29 DW_ISA_ARM_arm = 2 30 }; 31} 32 33class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter { 34 35 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can 36 /// make the right decision when printing asm code for different targets. 37 const ARMSubtarget *Subtarget; 38 39 /// AFI - Keep a pointer to ARMFunctionInfo for the current 40 /// MachineFunction. 41 ARMFunctionInfo *AFI; 42 43 /// MCP - Keep a pointer to constantpool entries of the current 44 /// MachineFunction. 45 const MachineConstantPool *MCP; 46 47public: 48 explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer) 49 : AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL) { 50 Subtarget = &TM.getSubtarget<ARMSubtarget>(); 51 } 52 53 virtual const char *getPassName() const { 54 return "ARM Assembly Printer"; 55 } 56 57 void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O, 58 const char *Modifier = 0); 59 60 virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, 61 unsigned AsmVariant, const char *ExtraCode, 62 raw_ostream &O); 63 virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum, 64 unsigned AsmVariant, 65 const char *ExtraCode, raw_ostream &O); 66 67 void EmitJumpTable(const MachineInstr *MI); 68 void EmitJump2Table(const MachineInstr *MI); 69 virtual void EmitInstruction(const MachineInstr *MI); 70 bool runOnMachineFunction(MachineFunction &F); 71 72 virtual void EmitConstantPool() {} // we emit constant pools customly! 73 virtual void EmitFunctionEntryLabel(); 74 void EmitStartOfAsmFile(Module &M); 75 void EmitEndOfAsmFile(Module &M); 76 void EmitXXStructor(const Constant *CV); 77 78 // lowerOperand - Convert a MachineOperand into the equivalent MCOperand. 79 bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp); 80 81private: 82 // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile() 83 void emitAttributes(); 84 85 // Helper for ELF .o only 86 void emitARMAttributeSection(); 87 88 // Generic helper used to emit e.g. ARMv5 mul pseudos 89 void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc); 90 91 void EmitUnwindingInstruction(const MachineInstr *MI); 92 93 // emitPseudoExpansionLowering - tblgen'erated. 94 bool emitPseudoExpansionLowering(MCStreamer &OutStreamer, 95 const MachineInstr *MI); 96 97public: 98 void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS); 99 100 MachineLocation getDebugValueLocation(const MachineInstr *MI) const; 101 102 /// EmitDwarfRegOp - Emit dwarf register operation. 103 virtual void EmitDwarfRegOp(const MachineLocation &MLoc) const; 104 105 virtual unsigned getISAEncoding() { 106 // ARM/Darwin adds ISA to the DWARF info for each function. 107 if (!Subtarget->isTargetDarwin()) 108 return 0; 109 return Subtarget->isThumb() ? 110 ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm; 111 } 112 113 MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol); 114 MCSymbol *GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2, 115 const MachineBasicBlock *MBB) const; 116 MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const; 117 118 MCSymbol *GetARMSJLJEHLabel(void) const; 119 120 MCSymbol *GetARMGVSymbol(const GlobalValue *GV); 121 122 /// EmitMachineConstantPoolValue - Print a machine constantpool value to 123 /// the .s file. 124 virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV); 125}; 126} // end namespace llvm 127 128#endif 129