lib/Target/ARM/ARMAsmPrinter.h

   1 //===-- ARMAsmPrinter.h - Print machine code to an ARM .s file ------------===//
   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
  22 namespace llvm {
  23
  24 class MCOperand;
  25
  26 namespace ARM {
  27   enum DW_ISA {
  28     DW_ISA_ARM_thumb = 1,
  29     DW_ISA_ARM_arm = 2
  30   };
  31 }
  32
  33 class 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 public:
  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
  77   // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
  78   bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
  79
  80 private:
  81   // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
  82   void emitAttributes();
  83
  84   // Helper for ELF .o only
  85   void emitARMAttributeSection();
  86
  87   // Generic helper used to emit e.g. ARMv5 mul pseudos
  88   void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc);
  89
  90   void EmitUnwindingInstruction(const MachineInstr *MI);
  91
  92   // emitPseudoExpansionLowering - tblgen'erated.
  93   bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
  94                                    const MachineInstr *MI);
  95
  96 public:
  97   void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
  98
  99   MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
 100
 101   /// EmitDwarfRegOp - Emit dwarf register operation.
 102   virtual void EmitDwarfRegOp(const MachineLocation &MLoc) const;
 103
 104   virtual unsigned getISAEncoding() {
 105     // ARM/Darwin adds ISA to the DWARF info for each function.
 106     if (!Subtarget->isTargetDarwin())
 107       return 0;
 108     return Subtarget->isThumb() ?
 109       llvm::ARM::DW_ISA_ARM_thumb : llvm::ARM::DW_ISA_ARM_arm;
 110   }
 111
 112   MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol);
 113   MCSymbol *GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
 114                                         const MachineBasicBlock *MBB) const;
 115   MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;
 116
 117   MCSymbol *GetARMSJLJEHLabel(void) const;
 118
 119   MCSymbol *GetARMGVSymbol(const GlobalValue *GV);
 120
 121   /// EmitMachineConstantPoolValue - Print a machine constantpool value to
 122   /// the .s file.
 123   virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
 124 };
 125 } // end namespace llvm
 126
 127 #endif