X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86RegisterInfo.h;h=eac8426a980ea0628069962694176c31c0f2fa24;hb=281bada3b03b97dad0ac9890706a057ab31a5dd3;hp=343f1c6d5131b7af44c90f5407f1c7d215d3bfb8;hpb=128aff4f9502a99af3573b98eb254490b3137646;p=oota-llvm.git diff --git a/lib/Target/X86/X86RegisterInfo.h b/lib/Target/X86/X86RegisterInfo.h index 343f1c6d513..eac8426a980 100644 --- a/lib/Target/X86/X86RegisterInfo.h +++ b/lib/Target/X86/X86RegisterInfo.h @@ -1,52 +1,164 @@ //===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===// // -// This file contains the X86 implementation of the MRegisterInfo class. +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains the X86 implementation of the TargetRegisterInfo class. // //===----------------------------------------------------------------------===// #ifndef X86REGISTERINFO_H #define X86REGISTERINFO_H -#include "llvm/Target/MRegisterInfo.h" +#include "llvm/Target/TargetRegisterInfo.h" +#include "X86GenRegisterInfo.h.inc" -class Type; +namespace llvm { + class Type; + class TargetInstrInfo; + class X86TargetMachine; -struct X86RegisterInfo : public MRegisterInfo { - X86RegisterInfo(); +/// N86 namespace - Native X86 register numbers +/// +namespace N86 { + enum { + EAX = 0, ECX = 1, EDX = 2, EBX = 3, ESP = 4, EBP = 5, ESI = 6, EDI = 7 + }; +} - const unsigned* getCalleeSaveRegs() const; +namespace X86 { + /// SubregIndex - The index of various sized subregister classes. Note that + /// these indices must be kept in sync with the class indices in the + /// X86RegisterInfo.td file. + enum SubregIndex { + SUBREG_8BIT = 1, SUBREG_8BIT_HI = 2, SUBREG_16BIT = 3, SUBREG_32BIT = 4 + }; +} - /// Returns register class appropriate for input SSA register - /// - const TargetRegisterClass *getClassForReg(unsigned Reg) const; - const TargetRegisterClass* getRegClassForType(const Type* Ty) const; +/// DWARFFlavour - Flavour of dwarf regnumbers +/// +namespace DWARFFlavour { + enum { + X86_64 = 0, X86_32_DarwinEH = 1, X86_32_Generic = 2 + }; +} + +class X86RegisterInfo : public X86GenRegisterInfo { +public: + X86TargetMachine &TM; + const TargetInstrInfo &TII; + +private: + /// Is64Bit - Is the target 64-bits. + /// + bool Is64Bit; + + /// IsWin64 - Is the target on of win64 flavours + /// + bool IsWin64; + + /// SlotSize - Stack slot size in bytes. + /// + unsigned SlotSize; + + /// StackAlign - Default stack alignment. + /// + unsigned StackAlign; + + /// StackPtr - X86 physical register used as stack ptr. + /// + unsigned StackPtr; + + /// FramePtr - X86 physical register used as frame ptr. + /// + unsigned FramePtr; + +public: + X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii); + + /// getX86RegNum - Returns the native X86 register number for the given LLVM + /// register identifier. + static unsigned getX86RegNum(unsigned RegNo); + + unsigned getStackAlignment() const { return StackAlign; } + + /// getDwarfRegNum - allows modification of X86GenRegisterInfo::getDwarfRegNum + /// (created by TableGen) for target dependencies. + int getDwarfRegNum(unsigned RegNum, bool isEH) const; /// Code Generation virtual methods... - void storeRegToStackSlot(MachineBasicBlock &MBB, - MachineBasicBlock::iterator &MBBI, - unsigned SrcReg, int FrameIndex, - const TargetRegisterClass *RC) const; - - void loadRegFromStackSlot(MachineBasicBlock &MBB, - MachineBasicBlock::iterator &MBBI, - unsigned DestReg, int FrameIndex, - const TargetRegisterClass *RC) const; - - void copyRegToReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator &MBBI, - unsigned DestReg, unsigned SrcReg, - const TargetRegisterClass *RC) const; + /// + + /// getPointerRegClass - Returns a TargetRegisterClass used for pointer + /// values. + const TargetRegisterClass *getPointerRegClass() const; + + /// getCrossCopyRegClass - Returns a legal register class to copy a register + /// in the specified class to or from. Returns NULL if it is possible to copy + /// between a two registers of the specified class. + const TargetRegisterClass * + getCrossCopyRegClass(const TargetRegisterClass *RC) const; + + /// getCalleeSavedRegs - Return a null-terminated list of all of the + /// callee-save registers on this target. + const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const; + + /// getCalleeSavedRegClasses - Return a null-terminated list of the preferred + /// register classes to spill each callee-saved register with. The order and + /// length of this list match the getCalleeSavedRegs() list. + const TargetRegisterClass* const* + getCalleeSavedRegClasses(const MachineFunction *MF = 0) const; + + /// getReservedRegs - Returns a bitset indexed by physical register number + /// indicating if a register is a special register that has particular uses and + /// should be considered unavailable at all times, e.g. SP, RA. This is used by + /// register scavenger to determine what registers are free. + BitVector getReservedRegs(const MachineFunction &MF) const; + + bool hasFP(const MachineFunction &MF) const; + + bool needsStackRealignment(const MachineFunction &MF) const; + + bool hasReservedCallFrame(MachineFunction &MF) const; + + bool hasReservedSpillSlot(MachineFunction &MF, unsigned Reg, + int &FrameIdx) const; void eliminateCallFramePseudoInstr(MachineFunction &MF, - MachineBasicBlock &MBB, - MachineBasicBlock::iterator &I) const; + MachineBasicBlock &MBB, + MachineBasicBlock::iterator MI) const; - void eliminateFrameIndex(MachineFunction &MF, - MachineBasicBlock::iterator &II) const; + void eliminateFrameIndex(MachineBasicBlock::iterator MI, + int SPAdj, RegScavenger *RS = NULL) const; - void processFunctionBeforeFrameFinalized(MachineFunction &MF) const; + void processFunctionBeforeCalleeSavedScan(MachineFunction &MF, + RegScavenger *RS = NULL) const; + void emitCalleeSavedFrameMoves(MachineFunction &MF, unsigned LabelId, + unsigned FramePtr) const; void emitPrologue(MachineFunction &MF) const; void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; + + // Debug information queries. + unsigned getRARegister() const; + unsigned getFrameRegister(MachineFunction &MF) const; + int getFrameIndexOffset(MachineFunction &MF, int FI) const; + void getInitialFrameState(std::vector &Moves) const; + + // Exception handling queries. + unsigned getEHExceptionRegister() const; + unsigned getEHHandlerRegister() const; }; +// getX86SubSuperRegister - X86 utility function. It returns the sub or super +// register of a specific X86 register. +// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) return X86:AX +unsigned getX86SubSuperRegister(unsigned, MVT, bool High=false); + +} // End llvm namespace + #endif