llvm::Evaluator Class Reference

This class evaluates LLVM IR, producing the Constant representing each SSA instruction. More...

#include "llvm/Transforms/Utils/Evaluator.h"

Public Member Functions
	Evaluator (const DataLayout &DL, const TargetLibraryInfo *TLI)
	~Evaluator ()
bool	EvaluateFunction (Function *F, Constant *&RetVal, const SmallVectorImpl< Constant * > &ActualArgs)
	Evaluate a call to function F, returning true if successful, false if we can't evaluate it.
DenseMap< GlobalVariable *, Constant * >	getMutatedInitializers () const
const SmallPtrSetImpl< GlobalVariable * > &	getInvariants () const

Detailed Description

This class evaluates LLVM IR, producing the Constant representing each SSA instruction.

Changes to global variables are stored in a mapping that can be iterated over after the evaluation is complete. Once an evaluation call fails, the evaluation object should not be reused.

Definition at line 37 of file Evaluator.h.

Constructor & Destructor Documentation

Evaluator()

llvm::Evaluator::Evaluator ( const DataLayout &  DL, const TargetLibraryInfo *  TLI  )

inline

Definition at line 82 of file Evaluator.h.

References DL.

~Evaluator()

llvm::Evaluator::~Evaluator ( )

inline

Definition at line 87 of file Evaluator.h.

References llvm::Constant::getNullValue().

Member Function Documentation

EvaluateFunction()

bool Evaluator::EvaluateFunction	(	Function *	F,
		Constant *&	RetVal,
		const SmallVectorImpl< Constant * > &	ActualArgs
	)

Evaluate a call to function F, returning true if successful, false if we can't evaluate it.

ActualArgs contains the formal arguments for the function.

Definition at line 629 of file Evaluator.cpp.

References Arg, assert(), llvm::BasicBlock::begin(), llvm::dbgs(), llvm::enumerate(), F, llvm::PHINode::getIncomingValueForBlock(), llvm::User::getNumOperands(), llvm::User::getOperand(), llvm::ReturnInst::getReturnValue(), llvm::BasicBlock::getTerminator(), llvm::Value::getType(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::is_contained(), llvm::Type::isVoidTy(), LLVM_DEBUG, and llvm::SmallVectorBase< Size_T >::size().

Referenced by EvaluateStaticConstructor().

getInvariants()

const SmallPtrSetImpl< GlobalVariable * > & llvm::Evaluator::getInvariants ( ) const

inline

Definition at line 109 of file Evaluator.h.

Referenced by EvaluateStaticConstructor().

getMutatedInitializers()

DenseMap< GlobalVariable *, Constant * > llvm::Evaluator::getMutatedInitializers ( ) const

inline

Definition at line 102 of file Evaluator.h.

Referenced by EvaluateStaticConstructor().

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The documentation for this class was generated from the following files:

• include/llvm/Transforms/Utils/Evaluator.h
• lib/Transforms/Utils/Evaluator.cpp