src/llvm/lib/Target/ARM/ARMAsmPrinter.h

   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
  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   /// InConstantPool - Maintain state when emitting a sequence of constant
  48   /// pool entries so we can properly mark them as data regions.
  49   bool InConstantPool;
  50 public:
  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
  85 private:
  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
 101 public:
 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