//===-- PPCInstrInfo.h - PowerPC Instruction Information --------*- C++ -*-===// // // 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 PowerPC implementation of the TargetInstrInfo class. // //===----------------------------------------------------------------------===// #ifndef POWERPC_INSTRUCTIONINFO_H #define POWERPC_INSTRUCTIONINFO_H #include "PPC.h" #include "PPCRegisterInfo.h" #include "llvm/Target/TargetInstrInfo.h" #define GET_INSTRINFO_HEADER #include "PPCGenInstrInfo.inc" namespace llvm { /// PPCII - This namespace holds all of the PowerPC target-specific /// per-instruction flags. These must match the corresponding definitions in /// PPC.td and PPCInstrFormats.td. namespace PPCII { enum { // PPC970 Instruction Flags. These flags describe the characteristics of the // PowerPC 970 (aka G5) dispatch groups and how they are formed out of // raw machine instructions. /// PPC970_First - This instruction starts a new dispatch group, so it will /// always be the first one in the group. PPC970_First = 0x1, /// PPC970_Single - This instruction starts a new dispatch group and /// terminates it, so it will be the sole instruction in the group. PPC970_Single = 0x2, /// PPC970_Cracked - This instruction is cracked into two pieces, requiring /// two dispatch pipes to be available to issue. PPC970_Cracked = 0x4, /// PPC970_Mask/Shift - This is a bitmask that selects the pipeline type that /// an instruction is issued to. PPC970_Shift = 3, PPC970_Mask = 0x07 << PPC970_Shift }; enum PPC970_Unit { /// These are the various PPC970 execution unit pipelines. Each instruction /// is one of these. PPC970_Pseudo = 0 << PPC970_Shift, // Pseudo instruction PPC970_FXU = 1 << PPC970_Shift, // Fixed Point (aka Integer/ALU) Unit PPC970_LSU = 2 << PPC970_Shift, // Load Store Unit PPC970_FPU = 3 << PPC970_Shift, // Floating Point Unit PPC970_CRU = 4 << PPC970_Shift, // Control Register Unit PPC970_VALU = 5 << PPC970_Shift, // Vector ALU PPC970_VPERM = 6 << PPC970_Shift, // Vector Permute Unit PPC970_BRU = 7 << PPC970_Shift // Branch Unit }; } // end namespace PPCII class PPCInstrInfo : public PPCGenInstrInfo { PPCTargetMachine &TM; const PPCRegisterInfo RI; bool StoreRegToStackSlot(MachineFunction &MF, unsigned SrcReg, bool isKill, int FrameIdx, const TargetRegisterClass *RC, SmallVectorImpl &NewMIs, bool &NonRI, bool &SpillsVRS) const; bool LoadRegFromStackSlot(MachineFunction &MF, DebugLoc DL, unsigned DestReg, int FrameIdx, const TargetRegisterClass *RC, SmallVectorImpl &NewMIs, bool &NonRI, bool &SpillsVRS) const; virtual void anchor(); public: explicit PPCInstrInfo(PPCTargetMachine &TM); /// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As /// such, whenever a client has an instance of instruction info, it should /// always be able to get register info as well (through this method). /// virtual const PPCRegisterInfo &getRegisterInfo() const { return RI; } ScheduleHazardRecognizer * CreateTargetHazardRecognizer(const TargetMachine *TM, const ScheduleDAG *DAG) const; ScheduleHazardRecognizer * CreateTargetPostRAHazardRecognizer(const InstrItineraryData *II, const ScheduleDAG *DAG) const; bool isCoalescableExtInstr(const MachineInstr &MI, unsigned &SrcReg, unsigned &DstReg, unsigned &SubIdx) const; unsigned isLoadFromStackSlot(const MachineInstr *MI, int &FrameIndex) const; unsigned isStoreToStackSlot(const MachineInstr *MI, int &FrameIndex) const; // commuteInstruction - We can commute rlwimi instructions, but only if the // rotate amt is zero. We also have to munge the immediates a bit. virtual MachineInstr *commuteInstruction(MachineInstr *MI, bool NewMI) const; virtual void insertNoop(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI) const; // Branch analysis. virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, MachineBasicBlock *&FBB, SmallVectorImpl &Cond, bool AllowModify) const; virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const; virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, MachineBasicBlock *FBB, const SmallVectorImpl &Cond, DebugLoc DL) const; // Select analysis. virtual bool canInsertSelect(const MachineBasicBlock&, const SmallVectorImpl &Cond, unsigned, unsigned, int&, int&, int&) const; virtual void insertSelect(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, DebugLoc DL, unsigned DstReg, const SmallVectorImpl &Cond, unsigned TrueReg, unsigned FalseReg) const; virtual void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, DebugLoc DL, unsigned DestReg, unsigned SrcReg, bool KillSrc) const; virtual void storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, unsigned SrcReg, bool isKill, int FrameIndex, const TargetRegisterClass *RC, const TargetRegisterInfo *TRI) const; virtual void loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, unsigned DestReg, int FrameIndex, const TargetRegisterClass *RC, const TargetRegisterInfo *TRI) const; virtual bool ReverseBranchCondition(SmallVectorImpl &Cond) const; virtual bool FoldImmediate(MachineInstr *UseMI, MachineInstr *DefMI, unsigned Reg, MachineRegisterInfo *MRI) const; // If conversion by predication (only supported by some branch instructions). // All of the profitability checks always return true; it is always // profitable to use the predicated branches. virtual bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles, unsigned ExtraPredCycles, const BranchProbability &Probability) const { return true; } virtual bool isProfitableToIfCvt(MachineBasicBlock &TMBB, unsigned NumT, unsigned ExtraT, MachineBasicBlock &FMBB, unsigned NumF, unsigned ExtraF, const BranchProbability &Probability) const; virtual bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, unsigned NumCycles, const BranchProbability &Probability) const { return true; } virtual bool isProfitableToUnpredicate(MachineBasicBlock &TMBB, MachineBasicBlock &FMBB) const { return false; } // Predication support. bool isPredicated(const MachineInstr *MI) const; virtual bool isUnpredicatedTerminator(const MachineInstr *MI) const; virtual bool PredicateInstruction(MachineInstr *MI, const SmallVectorImpl &Pred) const; virtual bool SubsumesPredicate(const SmallVectorImpl &Pred1, const SmallVectorImpl &Pred2) const; virtual bool DefinesPredicate(MachineInstr *MI, std::vector &Pred) const; virtual bool isPredicable(MachineInstr *MI) const; // Comparison optimization. virtual bool analyzeCompare(const MachineInstr *MI, unsigned &SrcReg, unsigned &SrcReg2, int &Mask, int &Value) const; virtual bool optimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg, unsigned SrcReg2, int Mask, int Value, const MachineRegisterInfo *MRI) const; /// GetInstSize - Return the number of bytes of code the specified /// instruction may be. This returns the maximum number of bytes. /// virtual unsigned GetInstSizeInBytes(const MachineInstr *MI) const; }; } #endif