LLVM: lib/IR/Constants.cpp File Reference

LLVM 17.0.0git

lib
IR

#include "llvm/IR/Constants.h"
#include "LLVMContextImpl.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/ConstantFold.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/GetElementPtrTypeIterator.h"
#include "llvm/IR/GlobalAlias.h"
#include "llvm/IR/GlobalIFunc.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include "llvm/IR/Value.def"

Go to the source code of this file.

Macros
#define	HANDLE_CONSTANT(Name)

#define	HANDLE_CONSTANT(Name)

Functions
static bool	containsUndefinedElement (const Constant C, function_ref< bool(const Constant )> HasFn)

static bool	ConstHasGlobalValuePredicate (const Constant C, bool(Predicate)(const GlobalValue *))
	Check if C contains a GlobalValue for which Predicate is true.

static bool	constantIsDead (const Constant *C, bool RemoveDeadUsers)
	Return true if the specified constantexpr is dead.

template<typename ItTy , typename EltTy >
static bool	rangeOnlyContains (ItTy Start, ItTy End, EltTy Elt)

template<typename SequentialTy , typename ElementTy >
static Constant *	getIntSequenceIfElementsMatch (ArrayRef< Constant * > V)

template<typename SequentialTy , typename ElementTy >
static Constant *	getFPSequenceIfElementsMatch (ArrayRef< Constant * > V)

template<typename SequenceTy >
static Constant *	getSequenceIfElementsMatch (Constant C, ArrayRef< Constant > V)

static Constant *	getFoldedCast (Instruction::CastOps opc, Constant C, Type Ty, bool OnlyIfReduced=false)
	This is a utility function to handle folding of casts and lookup of the cast in the ExprConstants map.

static bool	isAllZeros (StringRef Arr)
	Return true if the array is empty or all zeros.

Macro Definition Documentation

◆ HANDLE_CONSTANT [1/2]

#define HANDLE_CONSTANT ( Name )

Value:

  case Value::Name##Val:                                                       \
    cast<Name>(this)->destroyConstantImpl();                                   \
    break;

◆ HANDLE_CONSTANT [2/2]

#define HANDLE_CONSTANT ( Name )

Value:

  case Value::Name##Val:                                                       \
    Replacement = cast<Name>(this)->handleOperandChangeImpl(From, To);         \
    break;

Function Documentation

◆ constantIsDead()

static bool constantIsDead	(	const Constant *	C,
		bool	RemoveDeadUsers
	)

static

Return true if the specified constantexpr is dead.

This involves recursively traversing users of the constantexpr. If RemoveDeadUsers is true, also remove dead users at the same time.

Definition at line 679 of file Constants.cpp.

References llvm::CallingConv::C, constantIsDead(), E, I, and llvm::ReplaceableMetadataImpl::SalvageDebugInfo().

Referenced by constantIsDead(), and llvm::Constant::removeDeadConstantUsers().

◆ ConstHasGlobalValuePredicate()

static bool ConstHasGlobalValuePredicate	(	const Constant *	C,
		bool()(const GlobalValue )	Predicate
	)

static

Check if C contains a GlobalValue for which Predicate is true.

Definition at line 570 of file Constants.cpp.

References llvm::CallingConv::C, llvm::SmallVectorBase< Size_T >::empty(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::SmallVectorImpl< T >::pop_back_val(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

Referenced by llvm::Constant::isDLLImportDependent(), and llvm::Constant::isThreadDependent().

◆ containsUndefinedElement()

static bool containsUndefinedElement	(	const Constant *	C,
		function_ref< bool(const Constant *)>	HasFn
	)

static

Definition at line 309 of file Constants.cpp.

References llvm::CallingConv::C.

Referenced by llvm::Constant::containsPoisonElement(), llvm::Constant::containsUndefElement(), and llvm::Constant::containsUndefOrPoisonElement().

◆ getFoldedCast()

static Constant * getFoldedCast	(	Instruction::CastOps	opc,
		Constant *	C,
		Type *	Ty,
		bool	OnlyIfReduced = `false`
	)

static

This is a utility function to handle folding of casts and lookup of the cast in the ExprConstants map.

It is used by the various get* methods below.

Definition at line 1939 of file Constants.cpp.

References assert(), llvm::CallingConv::C, llvm::ConstantFoldCastInstruction(), llvm::LLVMContextImpl::ExprConstants, llvm::Type::getContext(), llvm::Type::isFirstClassType(), and llvm::LLVMContext::pImpl.

Referenced by llvm::ConstantExpr::getAddrSpaceCast(), llvm::ConstantExpr::getBitCast(), llvm::ConstantExpr::getFPExtend(), llvm::ConstantExpr::getFPToSI(), llvm::ConstantExpr::getFPToUI(), llvm::ConstantExpr::getFPTrunc(), llvm::ConstantExpr::getIntToPtr(), llvm::ConstantExpr::getPtrToInt(), llvm::ConstantExpr::getSExt(), llvm::ConstantExpr::getSIToFP(), llvm::ConstantExpr::getTrunc(), llvm::ConstantExpr::getUIToFP(), and llvm::ConstantExpr::getZExt().

◆ getFPSequenceIfElementsMatch()

template<typename SequentialTy , typename ElementTy >

static Constant * getFPSequenceIfElementsMatch ( ArrayRef< Constant * > V )

static

Definition at line 1174 of file Constants.cpp.

References assert(), llvm::CallingConv::C, getType(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

◆ getIntSequenceIfElementsMatch()

template<typename SequentialTy , typename ElementTy >

static Constant * getIntSequenceIfElementsMatch ( ArrayRef< Constant * > V )

static

Definition at line 1161 of file Constants.cpp.

References assert(), llvm::CallingConv::C, and llvm::SmallVectorTemplateBase< T, bool >::push_back().

◆ getSequenceIfElementsMatch()

template<typename SequenceTy >

static Constant * getSequenceIfElementsMatch	(	Constant *	C,
		ArrayRef< Constant * >	V
	)

static

Definition at line 1187 of file Constants.cpp.

References llvm::CallingConv::C.

◆ isAllZeros()

static bool isAllZeros ( StringRef Arr )

static

Return true if the array is empty or all zeros.

Definition at line 2811 of file Constants.cpp.

References I.

Referenced by llvm::ConstantDataSequential::getImpl().

◆ rangeOnlyContains()

template<typename ItTy , typename EltTy >

static bool rangeOnlyContains	(	ItTy	Start,
		ItTy	End,
		EltTy	Elt
	)

static

Definition at line 1153 of file Constants.cpp.

References End.