AMDGPUCombinerHelper.cpp File Reference

#include "AMDGPUCombinerHelper.h"
#include "GCNSubtarget.h"
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "llvm/CodeGen/GlobalISel/GenericMachineInstrs.h"
#include "llvm/CodeGen/GlobalISel/MIPatternMatch.h"
#include "llvm/IR/IntrinsicsAMDGPU.h"
#include "llvm/Target/TargetMachine.h"

Go to the source code of this file.

Functions
static LLVM_READNONE bool	fnegFoldsIntoMI (const MachineInstr &MI)
static LLVM_READONLY bool	opMustUseVOP3Encoding (const MachineInstr &MI, const MachineRegisterInfo &MRI)
	returns true if the operation will definitely need to use a 64-bit encoding, and thus will use a VOP3 encoding regardless of the source modifiers.
static LLVM_READONLY bool	hasSourceMods (const MachineInstr &MI)
static bool	allUsesHaveSourceMods (MachineInstr &MI, MachineRegisterInfo &MRI, unsigned CostThreshold=4)
static bool	mayIgnoreSignedZero (MachineInstr &MI)
static bool	isInv2Pi (const APFloat &APF)
static bool	isConstantCostlierToNegate (MachineInstr &MI, Register Reg, MachineRegisterInfo &MRI)
static unsigned	inverseMinMax (unsigned Opc)
static bool	isFPExtFromF16OrConst (const MachineRegisterInfo &MRI, Register Reg)

Function Documentation

allUsesHaveSourceMods()

bool allUsesHaveSourceMods ( MachineInstr & MI, MachineRegisterInfo & MRI, unsigned CostThreshold = 4 )

static

Definition at line 124 of file AMDGPUCombinerHelper.cpp.

References CostThreshold, hasSourceMods(), MI, MRI, and opMustUseVOP3Encoding().

Referenced by llvm::AMDGPUCombinerHelper::matchFoldableFneg().

fnegFoldsIntoMI()

LLVM_READNONE bool fnegFoldsIntoMI ( const MachineInstr & MI )

static

Definition at line 28 of file AMDGPUCombinerHelper.cpp.

References llvm::cast(), and MI.

Referenced by llvm::AMDGPUCombinerHelper::matchFoldableFneg().

hasSourceMods()

LLVM_READONLY bool hasSourceMods ( const MachineInstr & MI )

static

Definition at line 85 of file AMDGPUCombinerHelper.cpp.

References llvm::cast(), and MI.

Referenced by allUsesHaveSourceMods(), and llvm::AMDGPUTargetLowering::allUsesHaveSourceMods().

inverseMinMax()

unsigned inverseMinMax ( unsigned Opc )

static

Definition at line 176 of file AMDGPUCombinerHelper.cpp.

References llvm_unreachable, and Opc.

Referenced by llvm::AMDGPUCombinerHelper::applyFoldableFneg(), and llvm::AMDGPUTargetLowering::performFNegCombine().

isConstantCostlierToNegate()

bool isConstantCostlierToNegate ( MachineInstr & MI, Register Reg, MachineRegisterInfo & MRI )

static

Definition at line 162 of file AMDGPUCombinerHelper.cpp.

References isInv2Pi(), llvm::MIPatternMatch::m_GFCstOrSplat(), MI, llvm::MIPatternMatch::mi_match(), MRI, and Reg.

Referenced by llvm::AMDGPUCombinerHelper::matchFoldableFneg().

isFPExtFromF16OrConst()

bool isFPExtFromF16OrConst ( const MachineRegisterInfo & MRI, Register Reg )

static

Definition at line 407 of file AMDGPUCombinerHelper.cpp.

References llvm::APFloat::convert(), llvm::APFloatBase::IEEEhalf(), MRI, Reg, llvm::APFloatBase::rmNearestTiesToEven, and llvm::LLT::scalar().

Referenced by llvm::AMDGPUCombinerHelper::matchExpandPromotedF16FMed3().

isInv2Pi()

bool isInv2Pi ( const APFloat & APF )

static

Definition at line 150 of file AMDGPUCombinerHelper.cpp.

References llvm::APFloat::bitwiseIsEqual(), llvm::APFloatBase::IEEEdouble(), llvm::APFloatBase::IEEEhalf(), and llvm::APFloatBase::IEEEsingle().

Referenced by llvm::AMDGPUTargetLowering::getConstantNegateCost(), and isConstantCostlierToNegate().

mayIgnoreSignedZero()

bool mayIgnoreSignedZero ( MachineInstr & MI )

static

Definition at line 145 of file AMDGPUCombinerHelper.cpp.

References llvm::MachineInstr::FmNsz, MI, and Options.

Referenced by llvm::AMDGPUCombinerHelper::matchFoldableFneg().

opMustUseVOP3Encoding()

LLVM_READONLY bool opMustUseVOP3Encoding ( const MachineInstr & MI, const MachineRegisterInfo & MRI )

static

returns true if the operation will definitely need to use a 64-bit encoding, and thus will use a VOP3 encoding regardless of the source modifiers.

Definition at line 77 of file AMDGPUCombinerHelper.cpp.

References llvm::isa(), MI, and MRI.

Referenced by allUsesHaveSourceMods(), and llvm::AMDGPUTargetLowering::allUsesHaveSourceMods().