SIFoldOperands.cpp File Reference

#include "AMDGPU.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "SIMachineFunctionInfo.h"
#include "llvm/ADT/DepthFirstIterator.h"
#include "llvm/CodeGen/MachineFunctionPass.h"

Include dependency graph for SIFoldOperands.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "si-fold-operands"

Functions
static unsigned	macToMad (unsigned Opc)
static bool	isInlineConstantIfFolded (const SIInstrInfo *TII, const MachineInstr &UseMI, unsigned OpNo, const MachineOperand &OpToFold)
static bool	frameIndexMayFold (const SIInstrInfo *TII, const MachineInstr &UseMI, int OpNo, const MachineOperand &OpToFold)
static bool	updateOperand (FoldCandidate &Fold, const SIInstrInfo &TII, const TargetRegisterInfo &TRI, const GCNSubtarget &ST)
static bool	isUseMIInFoldList (ArrayRef< FoldCandidate > FoldList, const MachineInstr *MI)
static void	appendFoldCandidate (SmallVectorImpl< FoldCandidate > &FoldList, MachineInstr *MI, unsigned OpNo, MachineOperand *FoldOp, bool Commuted=false, int ShrinkOp=-1)
static bool	tryAddToFoldList (SmallVectorImpl< FoldCandidate > &FoldList, MachineInstr *MI, unsigned OpNo, MachineOperand *OpToFold, const SIInstrInfo *TII)
static bool	isUseSafeToFold (const SIInstrInfo *TII, const MachineInstr &MI, const MachineOperand &UseMO)
static bool	getRegSeqInit (SmallVectorImpl< std::pair< MachineOperand *, unsigned >> &Defs, Register UseReg, uint8_t OpTy, const SIInstrInfo *TII, const MachineRegisterInfo &MRI)
static bool	tryToFoldACImm (const SIInstrInfo *TII, const MachineOperand &OpToFold, MachineInstr *UseMI, unsigned UseOpIdx, SmallVectorImpl< FoldCandidate > &FoldList)
static bool	evalBinaryInstruction (unsigned Opcode, int32_t &Result, uint32_t LHS, uint32_t RHS)
static unsigned	getMovOpc (bool IsScalar)
static void	stripExtraCopyOperands (MachineInstr &MI)
	Remove any leftover implicit operands from mutating the instruction. More...
static void	mutateCopyOp (MachineInstr &MI, const MCInstrDesc &NewDesc)
static MachineOperand *	getImmOrMaterializedImm (MachineRegisterInfo &MRI, MachineOperand &Op)
static bool	tryConstantFoldOp (MachineRegisterInfo &MRI, const SIInstrInfo *TII, MachineInstr *MI)
static int	getOModValue (unsigned Opc, int64_t Val)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "si-fold-operands"

Definition at line 18 of file SIFoldOperands.cpp.

Function Documentation

appendFoldCandidate()

static void appendFoldCandidate ( SmallVectorImpl< FoldCandidate > &  FoldList, MachineInstr *  MI, unsigned  OpNo, MachineOperand *  FoldOp, bool  Commuted = false, int  ShrinkOp = -1  )

static

Definition at line 333 of file SIFoldOperands.cpp.

References llvm::dbgs(), LLVM_DEBUG, and MI.

Referenced by tryAddToFoldList(), and tryToFoldACImm().

evalBinaryInstruction()

static bool evalBinaryInstruction ( unsigned  Opcode, int32_t &  Result, uint32_t  LHS, uint32_t  RHS  )

static

Definition at line 941 of file SIFoldOperands.cpp.

Referenced by tryConstantFoldOp().

frameIndexMayFold()

static bool frameIndexMayFold ( const SIInstrInfo *  TII, const MachineInstr &  UseMI, int  OpNo, const MachineOperand &  OpToFold  )

static

Definition at line 175 of file SIFoldOperands.cpp.

References llvm::AMDGPU::getNamedOperandIdx(), llvm::MachineOperand::isFI(), TII, and UseMI.

getImmOrMaterializedImm()

static MachineOperand* getImmOrMaterializedImm ( MachineRegisterInfo &  MRI, MachineOperand &  Op  )

static

Definition at line 1029 of file SIFoldOperands.cpp.

References llvm::tgtok::Def, llvm::MachineRegisterInfo::getVRegDef(), llvm::MachineOperand::isImm(), and MRI.

Referenced by tryConstantFoldOp().

getMovOpc()

static unsigned getMovOpc ( bool  IsScalar )

static

Definition at line 1007 of file SIFoldOperands.cpp.

Referenced by tryConstantFoldOp().

getOModValue()

static int getOModValue ( unsigned  Opc, int64_t  Val  )

static

Definition at line 1401 of file SIFoldOperands.cpp.

References llvm::SIOutMods::DIV2, llvm_unreachable, llvm::SIOutMods::MUL2, llvm::SIOutMods::MUL4, and llvm::SIOutMods::NONE.

getRegSeqInit()

static bool getRegSeqInit ( SmallVectorImpl< std::pair< MachineOperand *, unsigned >> &  Defs, Register  UseReg, uint8_t  OpTy, const SIInstrInfo *  TII, const MachineRegisterInfo &  MRI  )

static

Definition at line 497 of file SIFoldOperands.cpp.

References assert(), llvm::tgtok::Def, E, llvm::MachineOperand::getReg(), llvm::MachineOperand::getSubReg(), llvm::MachineRegisterInfo::getVRegDef(), I, llvm::MachineOperand::isReg(), llvm::Register::isVirtual(), MRI, TII, and UseReg().

Referenced by tryToFoldACImm().

isInlineConstantIfFolded()

static bool isInlineConstantIfFolded ( const SIInstrInfo *  TII, const MachineInstr &  UseMI, unsigned  OpNo, const MachineOperand &  OpToFold  )

static

Definition at line 151 of file SIFoldOperands.cpp.

References llvm::AMDGPU::getNamedOperandIdx(), macToMad(), llvm::MCOperandInfo::OperandType, llvm::MCInstrDesc::OpInfo, TII, and UseMI.

isUseMIInFoldList()

static bool isUseMIInFoldList ( ArrayRef< FoldCandidate >  FoldList, const MachineInstr *  MI  )

static

Definition at line 324 of file SIFoldOperands.cpp.

References MI.

Referenced by tryAddToFoldList(), and tryToFoldACImm().

isUseSafeToFold()

static bool isUseSafeToFold ( const SIInstrInfo *  TII, const MachineInstr &  MI, const MachineOperand &  UseMO  )

static

Definition at line 476 of file SIFoldOperands.cpp.

References llvm::MachineOperand::isUndef(), llvm::M0(), MI, and TII.

macToMad()

static unsigned macToMad ( unsigned  Opc )

static

Definition at line 131 of file SIFoldOperands.cpp.

Referenced by isInlineConstantIfFolded(), and tryAddToFoldList().

mutateCopyOp()

static void mutateCopyOp ( MachineInstr &  MI, const MCInstrDesc &  NewDesc  )

static

Definition at line 1024 of file SIFoldOperands.cpp.

References MI, and stripExtraCopyOperands().

Referenced by tryConstantFoldOp().

stripExtraCopyOperands()

static void stripExtraCopyOperands ( MachineInstr &  MI )

static

Remove any leftover implicit operands from mutating the instruction.

e.g. if we replace an s_and_b32 with a copy, we don't need the implicit scc def anymore.

Definition at line 1014 of file SIFoldOperands.cpp.

References llvm::MCInstrDesc::getNumImplicitDefs(), llvm::MCInstrDesc::getNumImplicitUses(), llvm::MCInstrDesc::getNumOperands(), I, and MI.

Referenced by mutateCopyOp(), and tryConstantFoldOp().

tryAddToFoldList()

static bool tryAddToFoldList ( SmallVectorImpl< FoldCandidate > &  FoldList, MachineInstr *  MI, unsigned  OpNo, MachineOperand *  OpToFold, const SIInstrInfo *  TII  )

static

Definition at line 346 of file SIFoldOperands.cpp.

References appendFoldCandidate(), assert(), llvm::TargetInstrInfo::CommuteAnyOperandIndex, llvm::numbers::e, llvm::MCInstrDesc::getNumOperands(), llvm::MachineOperand::getReg(), llvm::AMDGPU::getVOPe32(), i, llvm::MachineOperand::isFI(), llvm::MachineOperand::isGlobal(), llvm::MachineOperand::isImm(), llvm::MachineOperand::isReg(), isUseMIInFoldList(), macToMad(), MI, MRI, llvm::SIRegisterInfo::opCanUseInlineConstant(), llvm::MCOperandInfo::OperandType, llvm::MCInstrDesc::OpInfo, and TII.

tryConstantFoldOp()

static bool tryConstantFoldOp ( MachineRegisterInfo &  MRI, const SIInstrInfo *  TII, MachineInstr *  MI  )

static

Definition at line 1050 of file SIFoldOperands.cpp.

References evalBinaryInstruction(), llvm::MachineOperand::getImm(), getImmOrMaterializedImm(), getMovOpc(), llvm::AMDGPU::getNamedOperandIdx(), llvm::MachineOperand::isImm(), MI, MRI, mutateCopyOp(), stripExtraCopyOperands(), std::swap(), TII, and TRI.

tryToFoldACImm()

static bool tryToFoldACImm ( const SIInstrInfo *  TII, const MachineOperand &  OpToFold, MachineInstr *  UseMI, unsigned  UseOpIdx, SmallVectorImpl< FoldCandidate > &  FoldList  )

static

Definition at line 530 of file SIFoldOperands.cpp.

References appendFoldCandidate(), llvm::MachineOperand::ChangeToImmediate(), llvm::tgtok::Def, E, llvm::MachineInstr::getDesc(), llvm::MachineOperand::getImm(), llvm::MCInstrDesc::getNumOperands(), llvm::MachineInstr::getOperand(), llvm::MachineBasicBlock::getParent(), llvm::MachineInstr::getParent(), llvm::MachineOperand::getReg(), llvm::MachineFunction::getRegInfo(), getRegSeqInit(), llvm::MachineOperand::getSubReg(), llvm::MachineRegisterInfo::getVRegDef(), I, llvm::MachineOperand::isImm(), llvm::MachineOperand::isReg(), isUseMIInFoldList(), llvm::Register::isVirtual(), MRI, llvm::AMDGPU::OPERAND_REG_INLINE_AC_FIRST, llvm::AMDGPU::OPERAND_REG_INLINE_AC_LAST, llvm::AMDGPU::OPERAND_REG_INLINE_C_FIRST, llvm::AMDGPU::OPERAND_REG_INLINE_C_LAST, llvm::MCOperandInfo::OperandType, llvm::MCInstrDesc::OpInfo, TII, UseMI, and UseReg().

updateOperand()

static bool updateOperand ( FoldCandidate &  Fold, const SIInstrInfo &  TII, const TargetRegisterInfo &  TRI, const GCNSubtarget &  ST  )

static

Definition at line 202 of file SIFoldOperands.cpp.

References llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::MachineOperand::ChangeToFrameIndex(), llvm::MachineOperand::ChangeToGA(), llvm::MachineOperand::ChangeToImmediate(), llvm::MachineBasicBlock::computeRegisterLiveness(), llvm::MachineRegisterInfo::createVirtualRegister(), llvm::dbgs(), llvm::AMDGPU::getNamedOperandIdx(), llvm::MachineBasicBlock::getParent(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getRegClass(), llvm::MachineFunction::getRegInfo(), I, llvm::MachineOperand::isDef(), llvm::AMDGPU::isFoldableLiteralV216(), llvm::SIInstrFlags::IsMAI, llvm::SIInstrFlags::IsPacked, llvm::MachineOperand::isReg(), llvm::isUInt< 16 >(), llvm::RegState::Kill, LLVM_DEBUG, llvm::MachineBasicBlock::LQR_Dead, MBB, MI, Mod, MRI, llvm::SISrcMods::OP_SEL_0, llvm::SISrcMods::OP_SEL_1, llvm::AMDGPU::OPERAND_REG_IMM_V2FP16, llvm::AMDGPU::OPERAND_REG_IMM_V2INT16, llvm::AMDGPU::OPERAND_REG_INLINE_C_V2FP16, llvm::AMDGPU::OPERAND_REG_INLINE_C_V2INT16, llvm::MachineOperand::setIsUndef(), llvm::MachineOperand::setReg(), llvm::ARM_MB::ST, llvm::MachineOperand::substVirtReg(), TII, TRI, and llvm::MachineRegisterInfo::use_nodbg_empty().