1 //===-- ARMAsmPrinter.h - ARM implementation of AsmPrinter ------*- 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 #ifndef ARMASMPRINTER_H 11 #define ARMASMPRINTER_H 12 13 #include "ARM.h" 14 #include "ARMTargetMachine.h" 15 #include "llvm/CodeGen/AsmPrinter.h" 16 #include "llvm/Support/Compiler.h" 17 18 namespace llvm { 19 20 class MCOperand; 21 22 namespace ARM { 23 enum DW_ISA { 24 DW_ISA_ARM_thumb = 1, 25 DW_ISA_ARM_arm = 2 26 }; 27 } 28 29 class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter { 30 31 /// Subtarget - Keep a pointer to the ARMSubtarget around so that we can 32 /// make the right decision when printing asm code for different targets. 33 const ARMSubtarget *Subtarget; 34 35 /// AFI - Keep a pointer to ARMFunctionInfo for the current 36 /// MachineFunction. 37 ARMFunctionInfo *AFI; 38 39 /// MCP - Keep a pointer to constantpool entries of the current 40 /// MachineFunction. 41 const MachineConstantPool *MCP; 42 43 /// InConstantPool - Maintain state when emitting a sequence of constant 44 /// pool entries so we can properly mark them as data regions. 45 bool InConstantPool; 46 public: ARMAsmPrinter(TargetMachine & TM,MCStreamer & Streamer)47 explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer) 48 : AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL), InConstantPool(false) { 49 Subtarget = &TM.getSubtarget<ARMSubtarget>(); 50 } 51 getPassName()52 virtual const char *getPassName() const LLVM_OVERRIDE { 53 return "ARM Assembly / Object Emitter"; 54 } 55 56 void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O, 57 const char *Modifier = 0); 58 59 virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, 60 unsigned AsmVariant, const char *ExtraCode, 61 raw_ostream &O) LLVM_OVERRIDE; 62 virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum, 63 unsigned AsmVariant, const char *ExtraCode, 64 raw_ostream &O) LLVM_OVERRIDE; 65 66 void EmitJumpTable(const MachineInstr *MI); 67 void EmitJump2Table(const MachineInstr *MI); 68 virtual void EmitInstruction(const MachineInstr *MI) LLVM_OVERRIDE; 69 virtual bool runOnMachineFunction(MachineFunction &F) LLVM_OVERRIDE; 70 EmitConstantPool()71 virtual void EmitConstantPool() LLVM_OVERRIDE { 72 // we emit constant pools customly! 73 } 74 virtual void EmitFunctionBodyEnd() LLVM_OVERRIDE; 75 virtual void EmitFunctionEntryLabel() LLVM_OVERRIDE; 76 virtual void EmitStartOfAsmFile(Module &M) LLVM_OVERRIDE; 77 virtual void EmitEndOfAsmFile(Module &M) LLVM_OVERRIDE; 78 virtual void EmitXXStructor(const Constant *CV) LLVM_OVERRIDE; 79 80 // lowerOperand - Convert a MachineOperand into the equivalent MCOperand. 81 bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp); 82 83 private: 84 // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile() 85 void emitAttributes(); 86 87 // Helper for ELF .o only 88 void emitARMAttributeSection(); 89 90 // Generic helper used to emit e.g. ARMv5 mul pseudos 91 void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc); 92 93 void EmitUnwindingInstruction(const MachineInstr *MI); 94 95 // emitPseudoExpansionLowering - tblgen'erated. 96 bool emitPseudoExpansionLowering(MCStreamer &OutStreamer, 97 const MachineInstr *MI); 98 99 public: 100 void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS); 101 102 virtual MachineLocation 103 getDebugValueLocation(const MachineInstr *MI) const LLVM_OVERRIDE; 104 105 /// EmitDwarfRegOp - Emit dwarf register operation. 106 virtual void EmitDwarfRegOp(const MachineLocation &MLoc) const LLVM_OVERRIDE; 107 getISAEncoding()108 virtual unsigned getISAEncoding() LLVM_OVERRIDE { 109 // ARM/Darwin adds ISA to the DWARF info for each function. 110 if (!Subtarget->isTargetDarwin()) 111 return 0; 112 return Subtarget->isThumb() ? 113 ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm; 114 } 115 116 private: 117 MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol); 118 MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const; 119 120 MCSymbol *GetARMSJLJEHLabel() const; 121 122 MCSymbol *GetARMGVSymbol(const GlobalValue *GV); 123 124 public: 125 /// EmitMachineConstantPoolValue - Print a machine constantpool value to 126 /// the .s file. 127 virtual void 128 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) LLVM_OVERRIDE; 129 }; 130 } // end namespace llvm 131 132 #endif 133