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103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
//===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the X86 implementation of the MRegisterInfo class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef X86REGISTERINFO_H
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#define X86REGISTERINFO_H
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#include "llvm/Target/MRegisterInfo.h"
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#include "X86GenRegisterInfo.h.inc"
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namespace llvm {
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class Type;
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class TargetInstrInfo;
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class X86TargetMachine;
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struct X86RegisterInfo : public X86GenRegisterInfo {
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X86TargetMachine &TM;
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const TargetInstrInfo &TII;
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private:
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/// Is64Bit - Is the target 64-bits.
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bool Is64Bit;
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/// SlotSize - Stack slot size in bytes.
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unsigned SlotSize;
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/// StackPtr - X86 physical register used as stack ptr.
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unsigned StackPtr;
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/// FramePtr - X86 physical register used as frame ptr.
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unsigned FramePtr;
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public:
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X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii);
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/// Code Generation virtual methods...
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void storeRegToStackSlot(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned SrcReg, int FrameIndex,
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const TargetRegisterClass *RC) const;
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void loadRegFromStackSlot(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned DestReg, int FrameIndex,
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const TargetRegisterClass *RC) const;
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void copyRegToReg(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned DestReg, unsigned SrcReg,
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const TargetRegisterClass *RC) const;
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/// foldMemoryOperand - If this target supports it, fold a load or store of
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/// the specified stack slot into the specified machine instruction for the
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/// specified operand. If this is possible, the target should perform the
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/// folding and return true, otherwise it should return false. If it folds
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/// the instruction, it is likely that the MachineInstruction the iterator
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/// references has been changed.
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MachineInstr* foldMemoryOperand(MachineInstr* MI,
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unsigned OpNum,
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int FrameIndex) const;
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/// getCalleeSaveRegs - Return a null-terminated list of all of the
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/// callee-save registers on this target.
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const unsigned *getCalleeSaveRegs() const;
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/// getCalleeSaveRegClasses - Return a null-terminated list of the preferred
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/// register classes to spill each callee-saved register with. The order and
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/// length of this list match the getCalleeSaveRegs() list.
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const TargetRegisterClass* const* getCalleeSaveRegClasses() const;
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void eliminateCallFramePseudoInstr(MachineFunction &MF,
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MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI) const;
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void eliminateFrameIndex(MachineBasicBlock::iterator MI) const;
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void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
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void emitPrologue(MachineFunction &MF) const;
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void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const;
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// Debug information queries.
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unsigned getRARegister() const;
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unsigned getFrameRegister(MachineFunction &MF) const;
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};
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// getX86SubSuperRegister - X86 utility function. It returns the sub or super
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// register of a specific X86 register.
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// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) return X86:AX
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unsigned getX86SubSuperRegister(unsigned, MVT::ValueType, bool High=false);
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} // End llvm namespace
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#endif
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