LLVM API Documentation

X86RegisterInfo.h

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00001 //===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===//
00002 //
00003 //                     The LLVM Compiler Infrastructure
00004 //
00005 // This file was developed by the LLVM research group and is distributed under
00006 // the University of Illinois Open Source License. See LICENSE.TXT for details.
00007 //
00008 //===----------------------------------------------------------------------===//
00009 //
00010 // This file contains the X86 implementation of the MRegisterInfo class.
00011 //
00012 //===----------------------------------------------------------------------===//
00013 
00014 #ifndef X86REGISTERINFO_H
00015 #define X86REGISTERINFO_H
00016 
00017 #include "llvm/Target/MRegisterInfo.h"
00018 
00019 class llvm::Type;
00020 
00021 #include "X86GenRegisterInfo.h.inc"
00022 
00023 namespace llvm {
00024 
00025 struct X86RegisterInfo : public X86GenRegisterInfo {
00026   X86RegisterInfo();
00027 
00028   /// Code Generation virtual methods...
00029   void storeRegToStackSlot(MachineBasicBlock &MBB,
00030                            MachineBasicBlock::iterator MI,
00031                            unsigned SrcReg, int FrameIndex,
00032                            const TargetRegisterClass *RC) const;
00033 
00034   void loadRegFromStackSlot(MachineBasicBlock &MBB,
00035                             MachineBasicBlock::iterator MI,
00036                             unsigned DestReg, int FrameIndex,
00037                             const TargetRegisterClass *RC) const;
00038 
00039   void copyRegToReg(MachineBasicBlock &MBB,
00040                     MachineBasicBlock::iterator MI,
00041                     unsigned DestReg, unsigned SrcReg,
00042                     const TargetRegisterClass *RC) const;
00043 
00044   /// foldMemoryOperand - If this target supports it, fold a load or store of
00045   /// the specified stack slot into the specified machine instruction for the
00046   /// specified operand.  If this is possible, the target should perform the
00047   /// folding and return true, otherwise it should return false.  If it folds
00048   /// the instruction, it is likely that the MachineInstruction the iterator
00049   /// references has been changed.
00050   virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
00051                                           unsigned OpNum,
00052                                           int FrameIndex) const;
00053 
00054 
00055   void eliminateCallFramePseudoInstr(MachineFunction &MF,
00056                                      MachineBasicBlock &MBB,
00057                                      MachineBasicBlock::iterator MI) const;
00058 
00059   void eliminateFrameIndex(MachineBasicBlock::iterator MI) const;
00060 
00061   void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
00062 
00063   void emitPrologue(MachineFunction &MF) const;
00064   void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
00065 
00066   // Debug information queries.
00067   unsigned getRARegister() const;
00068   unsigned getFrameRegister(MachineFunction &MF) const;
00069 };
00070 
00071 } // End llvm namespace
00072 
00073 #endif