X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86RegisterInfo.h;h=9970c52c3e724592d9089c9061ab559e3198bd42;hb=c9e5015dece0a1a73bec358e11bc87594831279d;hp=e1aafab178376dc67baf5bf05e9dc0c2e1200247;hpb=5e6df4647e15c50daea9a8a4e7f4f417a266335c;p=oota-llvm.git diff --git a/lib/Target/X86/X86RegisterInfo.h b/lib/Target/X86/X86RegisterInfo.h index e1aafab1783..9970c52c3e7 100644 --- a/lib/Target/X86/X86RegisterInfo.h +++ b/lib/Target/X86/X86RegisterInfo.h @@ -2,19 +2,19 @@ // // The LLVM Compiler Infrastructure // -// This file was developed by the LLVM research group and is distributed under -// the University of Illinois Open Source License. See LICENSE.TXT for details. +// 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 MRegisterInfo class. +// 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" namespace llvm { @@ -22,6 +22,22 @@ namespace llvm { class TargetInstrInfo; class X86TargetMachine; +/// 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 + }; +} + +/// 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; @@ -29,54 +45,71 @@ public: 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 MI, - unsigned SrcReg, int FrameIndex, - const TargetRegisterClass *RC) const; - - void loadRegFromStackSlot(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - unsigned DestReg, int FrameIndex, - const TargetRegisterClass *RC) const; - - void copyRegToReg(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - unsigned DestReg, unsigned SrcReg, - const TargetRegisterClass *RC) const; - - /// foldMemoryOperand - If this target supports it, fold a load or store of - /// the specified stack slot into the specified machine instruction for the - /// specified operand. If this is possible, the target should perform the - /// folding and return true, otherwise it should return false. If it folds - /// the instruction, it is likely that the MachineInstruction the iterator - /// references has been changed. - MachineInstr* foldMemoryOperand(MachineInstr* MI, - unsigned OpNum, - int FrameIndex) const; + /// + + /// getMatchingSuperRegClass - Return a subclass of the specified register + /// class A so that each register in it has a sub-register of the + /// specified sub-register index which is in the specified register class B. + virtual const TargetRegisterClass * + getMatchingSuperRegClass(const TargetRegisterClass *A, + const TargetRegisterClass *B, unsigned Idx) const; + + const TargetRegisterClass* + getLargestLegalSuperClass(const TargetRegisterClass *RC) const; + + /// getPointerRegClass - Returns a TargetRegisterClass used for pointer + /// values. + const TargetRegisterClass *getPointerRegClass(unsigned Kind = 0) 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; + + unsigned getRegPressureLimit(const TargetRegisterClass *RC, + MachineFunction &MF) const; /// getCalleeSavedRegs - Return a null-terminated list of all of the /// callee-save registers on this target. - const unsigned *getCalleeSavedRegs() 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; + const unsigned *getCalleeSavedRegs(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 @@ -84,24 +117,26 @@ public: /// register scavenger to determine what registers are free. BitVector getReservedRegs(const MachineFunction &MF) const; - bool hasFP(const MachineFunction &MF) const; + bool canRealignStack(const MachineFunction &MF) const; + + bool needsStackRealignment(const MachineFunction &MF) const; + + bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg, + int &FrameIdx) const; void eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const; void eliminateFrameIndex(MachineBasicBlock::iterator MI, - RegScavenger *RS = NULL) const; - - void processFunctionBeforeFrameFinalized(MachineFunction &MF) const; - - void emitPrologue(MachineFunction &MF) const; - void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; + int SPAdj, RegScavenger *RS = NULL) const; // Debug information queries. unsigned getRARegister() const; - unsigned getFrameRegister(MachineFunction &MF) const; - void getInitialFrameState(std::vector &Moves) const; + unsigned getFrameRegister(const MachineFunction &MF) const; + unsigned getStackRegister() const { return StackPtr; } + // FIXME: Move to FrameInfok + unsigned getSlotSize() const { return SlotSize; } // Exception handling queries. unsigned getEHExceptionRegister() const; @@ -110,8 +145,8 @@ public: // 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::ValueType, bool High=false); +// e.g. getX86SubSuperRegister(X86::EAX, EVT::i16) return X86:AX +unsigned getX86SubSuperRegister(unsigned, EVT, bool High=false); } // End llvm namespace