1 //===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the X86 implementation of the MRegisterInfo class.
12 //===----------------------------------------------------------------------===//
14 #ifndef X86REGISTERINFO_H
15 #define X86REGISTERINFO_H
17 #include "llvm/Target/MRegisterInfo.h"
21 #include "X86GenRegisterInfo.h.inc"
25 struct X86RegisterInfo : public X86GenRegisterInfo {
28 /// Code Generation virtual methods...
29 void storeRegToStackSlot(MachineBasicBlock &MBB,
30 MachineBasicBlock::iterator MI,
31 unsigned SrcReg, int FrameIndex,
32 const TargetRegisterClass *RC) const;
34 void loadRegFromStackSlot(MachineBasicBlock &MBB,
35 MachineBasicBlock::iterator MI,
36 unsigned DestReg, int FrameIndex,
37 const TargetRegisterClass *RC) const;
39 void copyRegToReg(MachineBasicBlock &MBB,
40 MachineBasicBlock::iterator MI,
41 unsigned DestReg, unsigned SrcReg,
42 const TargetRegisterClass *RC) const;
44 unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
47 /// foldMemoryOperand - If this target supports it, fold a load or store of
48 /// the specified stack slot into the specified machine instruction for the
49 /// specified operand. If this is possible, the target should perform the
50 /// folding and return true, otherwise it should return false. If it folds
51 /// the instruction, it is likely that the MachineInstruction the iterator
52 /// references has been changed.
53 virtual MachineInstr* foldMemoryOperand(MachineInstr* MI,
55 int FrameIndex) const;
58 void eliminateCallFramePseudoInstr(MachineFunction &MF,
59 MachineBasicBlock &MBB,
60 MachineBasicBlock::iterator MI) const;
62 void eliminateFrameIndex(MachineBasicBlock::iterator MI) const;
64 void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
66 void emitPrologue(MachineFunction &MF) const;
67 void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
70 } // End llvm namespace