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 47 /// InConstantPool - Maintain state when emitting a sequence of constant 48 /// pool entries so we can properly mark them as data regions. 49 bool InConstantPool; 50public: 51 explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer) 52 : AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL), InConstantPool(false) { 53 Subtarget = &TM.getSubtarget<ARMSubtarget>(); 54 } 55 56 virtual const char *getPassName() const { 57 return "ARM Assembly Printer"; 58 } 59 60 void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O, 61 const char *Modifier = 0); 62 63 virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, 64 unsigned AsmVariant, const char *ExtraCode, 65 raw_ostream &O); 66 virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum, 67 unsigned AsmVariant, 68 const char *ExtraCode, raw_ostream &O); 69 70 void EmitJumpTable(const MachineInstr *MI); 71 void EmitJump2Table(const MachineInstr *MI); 72 virtual void EmitInstruction(const MachineInstr *MI); 73 bool runOnMachineFunction(MachineFunction &F); 74 75 virtual void EmitConstantPool() {} // we emit constant pools customly! 76 virtual void EmitFunctionBodyEnd(); 77 virtual void EmitFunctionEntryLabel(); 78 void EmitStartOfAsmFile(Module &M); 79 void EmitEndOfAsmFile(Module &M); 80 void EmitXXStructor(const Constant *CV); 81 82 // lowerOperand - Convert a MachineOperand into the equivalent MCOperand. 83 bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp); 84 85private: 86 // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile() 87 void emitAttributes(); 88 89 // Helper for ELF .o only 90 void emitARMAttributeSection(); 91 92 // Generic helper used to emit e.g. ARMv5 mul pseudos 93 void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc); 94 95 void EmitUnwindingInstruction(const MachineInstr *MI); 96 97 // emitPseudoExpansionLowering - tblgen'erated. 98 bool emitPseudoExpansionLowering(MCStreamer &OutStreamer, 99 const MachineInstr *MI); 100 101public: 102 void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS); 103 104 MachineLocation getDebugValueLocation(const MachineInstr *MI) const; 105 106 /// EmitDwarfRegOp - Emit dwarf register operation. 107 virtual void EmitDwarfRegOp(const MachineLocation &MLoc) const; 108 109 virtual unsigned getISAEncoding() { 110 // ARM/Darwin adds ISA to the DWARF info for each function. 111 if (!Subtarget->isTargetDarwin()) 112 return 0; 113 return Subtarget->isThumb() ? 114 ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm; 115 } 116 117 MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol); 118 MCSymbol *GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2, 119 const MachineBasicBlock *MBB) const; 120 MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const; 121 122 MCSymbol *GetARMSJLJEHLabel(void) const; 123 124 MCSymbol *GetARMGVSymbol(const GlobalValue *GV); 125 126 /// EmitMachineConstantPoolValue - Print a machine constantpool value to 127 /// the .s file. 128 virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV); 129}; 130} // end namespace llvm 131 132#endif 133