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