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/GISelKnownBits.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/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/Target/TargetMachine.h"
#include "llvm/Transforms/Utils/SizeOpts.h"
#include <numeric>
#include <optional>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "globalisel-utils"

Functions
static void	reportGISelDiagnostic (DiagnosticSeverity Severity, MachineFunction &MF, const TargetPassConfig &TPC, MachineOptimizationRemarkEmitter &MORE, MachineOptimizationRemarkMissed &R)
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	includesPoison (UndefPoisonKind Kind)
static bool	includesUndef (UndefPoisonKind Kind)
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)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "globalisel-utils"

Definition at line 41 of file Utils.cpp.

Function Documentation

canCreatePoison()

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

Definition at line 1933 of file Utils.cpp.

References MRI, and PoisonOnly.

canCreateUndefOrPoison()

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

static

Definition at line 1776 of file Utils.cpp.

References 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::GExtractVectorElement::getVectorReg(), includesPoison(), llvm::is_contained(), MRI, and shiftAmountKnownInRange().

Referenced by isGuaranteedNotToBeUndefOrPoison().

includesPoison()

static bool includesPoison ( UndefPoisonKind  Kind )

static

Definition at line 1768 of file Utils.cpp.

References PoisonOnly.

Referenced by canCreateUndefOrPoison().

includesUndef()

static bool includesUndef ( UndefPoisonKind  Kind )

static

Definition at line 1772 of file Utils.cpp.

References UndefOnly.

Referenced by isGuaranteedNotToBeUndefOrPoison().

isBuildVectorOp()

static bool isBuildVectorOp ( unsigned  Opcode )

static

Definition at line 1320 of file Utils.cpp.

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

isConstantScalar()

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

static

Definition at line 1451 of file Utils.cpp.

References MI.

Referenced by llvm::isConstantOrConstantVector().

isGuaranteedNotToBeUndefOrPoison()

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

static

Definition at line 1878 of file Utils.cpp.

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

Referenced by isGuaranteedNotToBeUndefOrPoison().

reportGISelDiagnostic()

static void reportGISelDiagnostic ( DiagnosticSeverity  Severity, MachineFunction &  MF, const TargetPassConfig &  TPC, MachineOptimizationRemarkEmitter &  MORE, MachineOptimizationRemarkMissed &  R  )

static

Definition at line 235 of file Utils.cpp.

References llvm::DS_Error, llvm::MachineFunction::getName(), llvm::TargetPassConfig::isGlobalISelAbortEnabled(), MORE, and llvm::report_fatal_error().

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

shiftAmountKnownInRange()

static bool shiftAmountKnownInRange ( Register  ShiftAmount, const MachineRegisterInfo &  MRI  )

static

Shifts return poison if shiftwidth is larger than the bitwidth.

Definition at line 1728 of file Utils.cpp.

References llvm::getIConstantVRegValWithLookThrough(), llvm::GMergeLikeInstr::getNumSources(), llvm::LLT::getScalarSizeInBits(), llvm::GMergeLikeInstr::getSourceReg(), I, llvm::LLT::isScalableVector(), llvm::LLT::isScalar(), and MRI.

Referenced by canCreateUndefOrPoison().