Utils.cpp File Reference

#include "llvm/CodeGen/GlobalISel/Utils.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/CodeGenCommonISel.h"
#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
#include "llvm/CodeGen/GlobalISel/GISelValueTracking.h"
#include "llvm/CodeGen/GlobalISel/GenericMachineInstrs.h"
#include "llvm/CodeGen/GlobalISel/LostDebugLocObserver.h"
#include "llvm/CodeGen/GlobalISel/MIPatternMatch.h"
#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
#include "llvm/CodeGen/LowLevelTypeUtils.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/MachineSizeOpts.h"
#include "llvm/CodeGen/RegisterBankInfo.h"
#include "llvm/CodeGen/StackProtector.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetOpcodes.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/IR/Constants.h"
#include "llvm/Support/UndefPoison.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Utils/SizeOpts.h"
#include <limits>
#include <numeric>
#include <optional>
#include <tuple>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "globalisel-utils"

Functions
static void	reportGISelDiagnostic (DiagnosticSeverity Severity, MachineFunction &MF, MachineOptimizationRemarkEmitter &MORE, MachineOptimizationRemarkMissed &R)
static GBuildVector *	getBuildVectorLikeDef (Register Reg, const MachineRegisterInfo &MRI)
static bool	isBuildVectorOp (unsigned Opcode)
static bool	isConstantScalar (const MachineInstr &MI, const MachineRegisterInfo &MRI, bool AllowFP=true, bool AllowOpaqueConstants=true)
static bool	shiftAmountKnownInRange (Register ShiftAmount, const MachineRegisterInfo &MRI)
	Shifts return poison if shiftwidth is larger than the bitwidth.
static bool	canCreateUndefOrPoison (Register Reg, const MachineRegisterInfo &MRI, bool ConsiderFlagsAndMetadata, UndefPoisonKind Kind)
static bool	isGuaranteedNotToBeUndefOrPoison (Register Reg, const MachineRegisterInfo &MRI, unsigned Depth, UndefPoisonKind Kind)
bool	canCreatePoison (Register Reg, const MachineRegisterInfo &MRI, bool ConsiderFlagsAndMetadata=true)
static bool	findGISelOptimalMemOpLowering (std::vector< LLT > &MemOps, unsigned Limit, const MemOp &Op, unsigned DstAS, unsigned SrcAS, const AttributeList &FuncAttributes, const TargetLowering &TLI)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "globalisel-utils"

Definition at line 45 of file Utils.cpp.

Function Documentation

canCreatePoison()

bool canCreatePoison	(	Register	Reg,
		const MachineRegisterInfo &	MRI,
		bool	ConsiderFlagsAndMetadata = true )

Definition at line 1960 of file Utils.cpp.

References llvm::PoisonOnly, and Reg.

canCreateUndefOrPoison()

bool canCreateUndefOrPoison ( Register Reg, const MachineRegisterInfo & MRI, bool ConsiderFlagsAndMetadata, UndefPoisonKind Kind )

static

Definition at line 1798 of file Utils.cpp.

References llvm::cast(), llvm::dyn_cast(), llvm::LLT::getElementCount(), llvm::getIConstantVRegValWithLookThrough(), llvm::GExtractVectorElement::getIndexReg(), llvm::details::FixedOrScalableQuantity< LeafTy, ValueTy >::getKnownMinValue(), llvm::GShuffleVector::getMask(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getType(), llvm::GExtractVectorElement::getVectorReg(), llvm::MachineRegisterInfo::getVRegDef(), llvm::includesPoison(), llvm::is_contained(), llvm::isa(), Reg, and shiftAmountKnownInRange().

findGISelOptimalMemOpLowering()

bool findGISelOptimalMemOpLowering ( std::vector< LLT > & MemOps, unsigned Limit, const MemOp & Op, unsigned DstAS, unsigned SrcAS, const AttributeList & FuncAttributes, const TargetLowering & TLI )

static

Definition at line 2087 of file Utils.cpp.

References llvm::TargetLoweringBase::allowsMisalignedMemoryAccesses(), assert(), llvm::bit_floor(), llvm::CallingConv::Fast, llvm::getMVTForLLT(), llvm::TargetLoweringBase::getOptimalMemOpLLT(), llvm::LLT::getSizeInBits(), llvm::LLT::getSizeInBytes(), llvm::LLT::integer(), llvm::LLT::isVector(), llvm::MachineMemOperand::MONone, and Size.

Referenced by llvm::canLowerMemCpyFamily().

getBuildVectorLikeDef()

GBuildVector * getBuildVectorLikeDef ( Register Reg, const MachineRegisterInfo & MRI )

static

Definition at line 801 of file Utils.cpp.

References llvm::getOpcodeDef(), and Reg.

Referenced by llvm::ConstantFoldVectorBinop().

isBuildVectorOp()

bool isBuildVectorOp ( unsigned Opcode )

static

Definition at line 1317 of file Utils.cpp.

Referenced by llvm::getVectorSplat(), and llvm::isConstantOrConstantVector().

isConstantScalar()

bool isConstantScalar ( const MachineInstr & MI, const MachineRegisterInfo & MRI, bool AllowFP = true, bool AllowOpaqueConstants = true )

static

Definition at line 1473 of file Utils.cpp.

References MI.

Referenced by llvm::isConstantOrConstantVector().

isGuaranteedNotToBeUndefOrPoison()

bool isGuaranteedNotToBeUndefOrPoison ( Register Reg, const MachineRegisterInfo & MRI, unsigned Depth, UndefPoisonKind Kind )

static

Definition at line 1905 of file Utils.cpp.

References llvm::all_of(), llvm::canCreateUndefOrPoison(), llvm::cast(), llvm::Depth, llvm::GMergeLikeInstr::getNumSources(), llvm::MachineInstr::getOpcode(), llvm::GMergeLikeInstr::getSourceReg(), llvm::MachineRegisterInfo::getVRegDef(), I, llvm::includesUndef(), llvm::isGuaranteedNotToBeUndefOrPoison(), llvm::MaxAnalysisRecursionDepth, Reg, and llvm::MachineInstr::uses().

reportGISelDiagnostic()

void reportGISelDiagnostic ( DiagnosticSeverity Severity, MachineFunction & MF, MachineOptimizationRemarkEmitter & MORE, MachineOptimizationRemarkMissed & R )

static

Definition at line 237 of file Utils.cpp.

References llvm::DS_Error, llvm::Enable, llvm::MachineFunction::getName(), llvm::MachineFunction::getTarget(), llvm::TargetOptions::GlobalISelAbort, MORE, llvm::TargetMachine::Options, and llvm::reportFatalUsageError().

Referenced by llvm::reportGISelFailure(), and llvm::reportGISelWarning().

shiftAmountKnownInRange()

bool shiftAmountKnownInRange ( Register ShiftAmount, const MachineRegisterInfo & MRI )

static

Shifts return poison if shiftwidth is larger than the bitwidth.

Definition at line 1766 of file Utils.cpp.

References llvm::getIConstantVRegValWithLookThrough(), llvm::GMergeLikeInstr::getNumSources(), llvm::getOpcodeDef(), llvm::GMergeLikeInstr::getSourceReg(), llvm::MachineRegisterInfo::getType(), and I.

Referenced by canCreateUndefOrPoison().