Constants.cpp File Reference

#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.

Variables
static cl::opt< bool >	UseConstantIntForFixedLengthSplat ("use-constant-int-for-fixed-length-splat", cl::init(false), cl::Hidden, cl::desc("Use ConstantInt's native fixed-length vector splat support."))
static cl::opt< bool >	UseConstantFPForFixedLengthSplat ("use-constant-fp-for-fixed-length-splat", cl::init(false), cl::Hidden, cl::desc("Use ConstantFP's native fixed-length vector splat support."))
static cl::opt< bool >	UseConstantIntForScalableSplat ("use-constant-int-for-scalable-splat", cl::init(false), cl::Hidden, cl::desc("Use ConstantInt's native scalable vector splat support."))
static cl::opt< bool >	UseConstantFPForScalableSplat ("use-constant-fp-for-scalable-splat", cl::init(false), cl::Hidden, cl::desc("Use ConstantFP's native scalable vector splat support."))

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 694 of file Constants.cpp.

References llvm::CallingConv::C, constantIsDead(), 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 585 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 323 of file Constants.cpp.

References llvm::CallingConv::C, and getNumElements().

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 2178 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::getIntToPtr(), llvm::ConstantExpr::getPtrToInt(), and llvm::ConstantExpr::getTrunc().

getFPSequenceIfElementsMatch()

template<typename SequentialTy , typename ElementTy >

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

static

Definition at line 1231 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 1218 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 1244 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 2836 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 1210 of file Constants.cpp.

References End.

Variable Documentation

UseConstantFPForFixedLengthSplat

cl::opt< bool > UseConstantFPForFixedLengthSplat("use-constant-fp-for-fixed-length-splat", cl::init(false), cl::Hidden, cl::desc("Use ConstantFP's native fixed-length vector splat support.")) ( "use-constant-fp-for-fixed-length-splat"  , cl::init(false)  , cl::Hidden  , cl::desc("Use ConstantFP's native fixed-length vector splat support.")    )

static

Referenced by llvm::ConstantVector::getSplat().

UseConstantFPForScalableSplat

cl::opt< bool > UseConstantFPForScalableSplat("use-constant-fp-for-scalable-splat", cl::init(false), cl::Hidden, cl::desc("Use ConstantFP's native scalable vector splat support.")) ( "use-constant-fp-for-scalable-splat"  , cl::init(false)  , cl::Hidden  , cl::desc("Use ConstantFP's native scalable vector splat support.")    )

static

Referenced by llvm::ConstantVector::getSplat().

UseConstantIntForFixedLengthSplat

cl::opt< bool > UseConstantIntForFixedLengthSplat("use-constant-int-for-fixed-length-splat", cl::init(false), cl::Hidden, cl::desc("Use ConstantInt's native fixed-length vector splat support.")) ( "use-constant-int-for-fixed-length-splat"  , cl::init(false)  , cl::Hidden  , cl::desc("Use ConstantInt's native fixed-length vector splat support.")    )

static

Referenced by llvm::ConstantVector::getSplat().

UseConstantIntForScalableSplat

cl::opt< bool > UseConstantIntForScalableSplat("use-constant-int-for-scalable-splat", cl::init(false), cl::Hidden, cl::desc("Use ConstantInt's native scalable vector splat support.")) ( "use-constant-int-for-scalable-splat"  , cl::init(false)  , cl::Hidden  , cl::desc("Use ConstantInt's native scalable vector splat support.")    )

static

Referenced by llvm::ConstantVector::getSplat().