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//===-- RISCVInstrInfo.h - RISCV Instruction Information --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file contains the RISCV implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_RISCV_RISCVINSTRINFO_H
#define LLVM_LIB_TARGET_RISCV_RISCVINSTRINFO_H
#include "RISCVRegisterInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#define GET_INSTRINFO_HEADER
#include "RISCVGenInstrInfo.inc"
namespace llvm {
class RISCVSubtarget;
class RISCVInstrInfo : public RISCVGenInstrInfo {
public:
explicit RISCVInstrInfo(RISCVSubtarget &STI);
unsigned isLoadFromStackSlot(const MachineInstr &MI,
int &FrameIndex) const override;
unsigned isStoreToStackSlot(const MachineInstr &MI,
int &FrameIndex) const override;
void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
const DebugLoc &DL, MCRegister DstReg, MCRegister SrcReg,
bool KillSrc) const override;
void storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI, Register SrcReg,
bool IsKill, int FrameIndex,
const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const override;
void loadRegFromStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MBBI, Register DstReg,
int FrameIndex, const TargetRegisterClass *RC,
const TargetRegisterInfo *TRI) const override;
// Materializes the given integer Val into DstReg.
void movImm(MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI,
const DebugLoc &DL, Register DstReg, uint64_t Val,
MachineInstr::MIFlag Flag = MachineInstr::NoFlags) const;
unsigned getInstSizeInBytes(const MachineInstr &MI) const override;
bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
MachineBasicBlock *&FBB,
SmallVectorImpl<MachineOperand> &Cond,
bool AllowModify) const override;
unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB, ArrayRef<MachineOperand> Cond,
const DebugLoc &dl,
int *BytesAdded = nullptr) const override;
unsigned insertIndirectBranch(MachineBasicBlock &MBB,
MachineBasicBlock &NewDestBB,
const DebugLoc &DL, int64_t BrOffset,
RegScavenger *RS = nullptr) const override;
unsigned removeBranch(MachineBasicBlock &MBB,
int *BytesRemoved = nullptr) const override;
bool
reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
MachineBasicBlock *getBranchDestBlock(const MachineInstr &MI) const override;
bool isBranchOffsetInRange(unsigned BranchOpc,
int64_t BrOffset) const override;
bool isAsCheapAsAMove(const MachineInstr &MI) const override;
bool verifyInstruction(const MachineInstr &MI,
StringRef &ErrInfo) const override;
bool getMemOperandWithOffsetWidth(const MachineInstr &LdSt,
const MachineOperand *&BaseOp,
int64_t &Offset, unsigned &Width,
const TargetRegisterInfo *TRI) const;
bool areMemAccessesTriviallyDisjoint(const MachineInstr &MIa,
const MachineInstr &MIb) const override;
std::pair<unsigned, unsigned>
decomposeMachineOperandsTargetFlags(unsigned TF) const override;
ArrayRef<std::pair<unsigned, const char *>>
getSerializableDirectMachineOperandTargetFlags() const override;
// Return true if the function can safely be outlined from.
virtual bool
isFunctionSafeToOutlineFrom(MachineFunction &MF,
bool OutlineFromLinkOnceODRs) const override;
// Return true if MBB is safe to outline from, and return any target-specific
// information in Flags.
virtual bool isMBBSafeToOutlineFrom(MachineBasicBlock &MBB,
unsigned &Flags) const override;
// Calculate target-specific information for a set of outlining candidates.
outliner::OutlinedFunction getOutliningCandidateInfo(
std::vector<outliner::Candidate> &RepeatedSequenceLocs) const override;
// Return if/how a given MachineInstr should be outlined.
virtual outliner::InstrType
getOutliningType(MachineBasicBlock::iterator &MBBI,
unsigned Flags) const override;
// Insert a custom frame for outlined functions.
virtual void
buildOutlinedFrame(MachineBasicBlock &MBB, MachineFunction &MF,
const outliner::OutlinedFunction &OF) const override;
// Insert a call to an outlined function into a given basic block.
virtual MachineBasicBlock::iterator
insertOutlinedCall(Module &M, MachineBasicBlock &MBB,
MachineBasicBlock::iterator &It, MachineFunction &MF,
const outliner::Candidate &C) const override;
protected:
const RISCVSubtarget &STI;
};
namespace RISCV {
// Match with the definitions in RISCVInstrFormatsV.td
enum RVVConstraintType {
NoConstraint = 0,
WidenV = 1,
WidenW = 2,
WidenCvt = 3,
Narrow = 4,
Iota = 5,
SlideUp = 6,
Vrgather = 7,
Vcompress = 8,
ConstraintOffset = 5,
ConstraintMask = 0b1111
};
} // end namespace RISCV
} // end namespace llvm
#endif
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