X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FTarget%2FX86%2FX86RegisterInfo.h;h=c3a2845c36227420292589e4159e9f1e56add253;hp=30902889cfb2b4ef6bb0af83cc9c31275df4e6db;hb=9889174eadb0f269ef132b3bd34a9f6fe3baa642;hpb=f191c80cd79ee35e47b5a4feed98d687782dfe85 diff --git a/lib/Target/X86/X86RegisterInfo.h b/lib/Target/X86/X86RegisterInfo.h index 30902889cfb..c3a2845c362 100644 --- a/lib/Target/X86/X86RegisterInfo.h +++ b/lib/Target/X86/X86RegisterInfo.h @@ -1,62 +1,40 @@ -//===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===// +//===-- X86RegisterInfo.h - X86 Register Information Impl -------*- C++ -*-===// // // 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 +#ifndef LLVM_LIB_TARGET_X86_X86REGISTERINFO_H +#define LLVM_LIB_TARGET_X86_X86REGISTERINFO_H -#include "llvm/ADT/DenseMap.h" -#include "llvm/ADT/SmallVector.h" -#include "llvm/Target/MRegisterInfo.h" -#include "X86GenRegisterInfo.h.inc" +#include "llvm/Target/TargetRegisterInfo.h" + +#define GET_REGINFO_HEADER +#include "X86GenRegisterInfo.inc" namespace llvm { - class Type; - 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_Darwin = 1, X86_32_ELF = 2 - }; -} - -class X86RegisterInfo : public X86GenRegisterInfo { -public: - X86TargetMachine &TM; - const TargetInstrInfo &TII; + class Triple; +class X86RegisterInfo final : public X86GenRegisterInfo { private: /// Is64Bit - Is the target 64-bits. /// bool Is64Bit; - /// SlotSize - Stack slot size in bytes. + /// IsWin64 - Is the target on of win64 flavours /// - unsigned SlotSize; + bool IsWin64; - /// StackAlign - Default stack alignment. + /// SlotSize - Stack slot size in bytes. /// - unsigned StackAlign; + unsigned SlotSize; /// StackPtr - X86 physical register used as stack ptr. /// @@ -66,162 +44,109 @@ private: /// unsigned FramePtr; - /// RegOp2MemOpTable2Addr, RegOp2MemOpTable0, RegOp2MemOpTable1, - /// RegOp2MemOpTable2 - Load / store folding opcode maps. - /// - DenseMap RegOp2MemOpTable2Addr; - DenseMap RegOp2MemOpTable0; - DenseMap RegOp2MemOpTable1; - DenseMap RegOp2MemOpTable2; - - /// MemOp2RegOpTable - Load / store unfolding opcode map. - /// - DenseMap > MemOp2RegOpTable; + /// BasePtr - X86 physical register used as a base ptr in complex stack + /// frames. I.e., when we need a 3rd base, not just SP and FP, due to + /// variable size stack objects. + unsigned BasePtr; public: - X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii); + X86RegisterInfo(const Triple &TT); - /// getX86RegNum - Returns the native X86 register number for the given LLVM - /// register identifier. - unsigned getX86RegNum(unsigned RegNo); - - /// getDwarfRegNum - allows modification of X86GenRegisterInfo::getDwarfRegNum - /// (created by TableGen) for target dependencies. - int getDwarfRegNum(unsigned RegNum) const; + // FIXME: This should be tablegen'd like getDwarfRegNum is + int getSEHRegNum(unsigned i) const; /// Code Generation virtual methods... /// - bool spillCalleeSavedRegisters(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - const std::vector &CSI) const; - - bool restoreCalleeSavedRegisters(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - const std::vector &CSI) const; - - void storeRegToStackSlot(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - unsigned SrcReg, int FrameIndex, - const TargetRegisterClass *RC) const; - - void storeRegToAddr(MachineFunction &MF, unsigned SrcReg, - SmallVectorImpl &Addr, - const TargetRegisterClass *RC, - SmallVectorImpl &NewMIs) const; - - void loadRegFromStackSlot(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - unsigned DestReg, int FrameIndex, - const TargetRegisterClass *RC) const; - - void loadRegFromAddr(MachineFunction &MF, unsigned DestReg, - SmallVectorImpl &Addr, - const TargetRegisterClass *RC, - SmallVectorImpl &NewMIs) const; - - void copyRegToReg(MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI, - unsigned DestReg, unsigned SrcReg, - const TargetRegisterClass *DestRC, - const TargetRegisterClass *SrcRC) const; - + bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override; + + /// 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. + const TargetRegisterClass * + getMatchingSuperRegClass(const TargetRegisterClass *A, + const TargetRegisterClass *B, + unsigned Idx) const override; + + const TargetRegisterClass * + getSubClassWithSubReg(const TargetRegisterClass *RC, + unsigned Idx) const override; + + const TargetRegisterClass * + getLargestLegalSuperClass(const TargetRegisterClass *RC, + const MachineFunction &MF) const override; + + /// getPointerRegClass - Returns a TargetRegisterClass used for pointer + /// values. + const TargetRegisterClass * + getPointerRegClass(const MachineFunction &MF, + unsigned Kind = 0) const override; + + /// 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 override; + + /// getGPRsForTailCall - Returns a register class with registers that can be + /// used in forming tail calls. const TargetRegisterClass * - getCrossCopyRegClass(const TargetRegisterClass *RC) const; - - void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, - unsigned DestReg, const MachineInstr *Orig) 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; - - /// foldMemoryOperand - Same as the previous version except it allows folding - /// of any load and store from / to any address, not just from a specific - /// stack slot. - MachineInstr* foldMemoryOperand(MachineInstr* MI, - unsigned OpNum, - MachineInstr* LoadMI) const; - - /// getOpcodeAfterMemoryFold - Returns the opcode of the would be new - /// instruction after load / store is folded into an instruction of the - /// specified opcode. It returns zero if the specified unfolding is not - /// possible. - unsigned getOpcodeAfterMemoryFold(unsigned Opc, unsigned OpNum) const; - - /// unfoldMemoryOperand - Separate a single instruction which folded a load or - /// a store or a load and a store into two or more instruction. If this is - /// possible, returns true as well as the new instructions by reference. - bool unfoldMemoryOperand(MachineFunction &MF, MachineInstr *MI, - unsigned Reg, bool UnfoldLoad, bool UnfoldStore, - SmallVectorImpl &NewMIs) const; - - bool unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N, - SmallVectorImpl &NewNodes) const; - - /// getOpcodeAfterMemoryUnfold - Returns the opcode of the would be new - /// instruction after load / store are unfolded from an instruction of the - /// specified opcode. It returns zero if the specified unfolding is not - /// possible. - unsigned getOpcodeAfterMemoryUnfold(unsigned Opc, - bool UnfoldLoad, bool UnfoldStore) const; + getGPRsForTailCall(const MachineFunction &MF) const; + + unsigned getRegPressureLimit(const TargetRegisterClass *RC, + MachineFunction &MF) const override; /// getCalleeSavedRegs - Return a null-terminated list of all of the /// callee-save registers on this target. - const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const; + const MCPhysReg * + getCalleeSavedRegs(const MachineFunction* MF) const override; + const uint32_t *getCallPreservedMask(const MachineFunction &MF, + CallingConv::ID) const override; + const uint32_t *getNoPreservedMask() const override; - /// 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; + // Calls involved in thread-local variable lookup save more registers than + // normal calls, so they need a different mask to represent this. + const uint32_t *getDarwinTLSCallPreservedMask() 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; + BitVector getReservedRegs(const MachineFunction &MF) const override; - bool hasReservedCallFrame(MachineFunction &MF) const; + void adjustStackMapLiveOutMask(uint32_t *Mask) const override; - void eliminateCallFramePseudoInstr(MachineFunction &MF, - MachineBasicBlock &MBB, - MachineBasicBlock::iterator MI) const; + bool hasBasePointer(const MachineFunction &MF) const; - void eliminateFrameIndex(MachineBasicBlock::iterator MI, - int SPAdj, RegScavenger *RS = NULL) const; + bool canRealignStack(const MachineFunction &MF) const override; - void processFunctionBeforeFrameFinalized(MachineFunction &MF) const; + bool hasReservedSpillSlot(const MachineFunction &MF, unsigned Reg, + int &FrameIdx) const override; - void emitPrologue(MachineFunction &MF) const; - void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; + void eliminateFrameIndex(MachineBasicBlock::iterator MI, + int SPAdj, unsigned FIOperandNum, + RegScavenger *RS = nullptr) const override; // Debug information queries. - unsigned getRARegister() const; - unsigned getFrameRegister(MachineFunction &MF) const; - void getInitialFrameState(std::vector &Moves) const; + unsigned getFrameRegister(const MachineFunction &MF) const override; + unsigned getPtrSizedFrameRegister(const MachineFunction &MF) const; + unsigned getStackRegister() const { return StackPtr; } + unsigned getBaseRegister() const { return BasePtr; } + // FIXME: Move to FrameInfok + unsigned getSlotSize() const { return SlotSize; } +}; - // Exception handling queries. - unsigned getEHExceptionRegister() const; - unsigned getEHHandlerRegister() const; +/// Returns the sub or super register of a specific X86 register. +/// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) returns X86::AX. +/// Aborts on error. +unsigned getX86SubSuperRegister(unsigned, MVT::SimpleValueType, bool High=false); -private: - MachineInstr* foldMemoryOperand(MachineInstr* MI, - unsigned OpNum, - SmallVector &MOs) const; -}; +/// Returns the sub or super register of a specific X86 register. +/// Like getX86SubSuperRegister() but returns 0 on error. +unsigned getX86SubSuperRegisterOrZero(unsigned, MVT::SimpleValueType, + bool High = false); -// 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); +//get512BitRegister - X86 utility - returns 512-bit super register +unsigned get512BitSuperRegister(unsigned Reg); } // End llvm namespace