llvm::InstModificationIRStrategy Class Reference

Strategy that modifies instruction attributes and operands. More...

#include "llvm/FuzzMutate/IRMutator.h"

Inheritance diagram for llvm::InstModificationIRStrategy:

Public Member Functions
uint64_t	getWeight (size_t CurrentSize, size_t MaxSize, uint64_t CurrentWeight) override
	Provide a weight to bias towards choosing this strategy for a mutation.
void	mutate (Instruction &Inst, RandomIRBuilder &IB) override
virtual void	mutate (Module &M, RandomIRBuilder &IB)
virtual void	mutate (Function &F, RandomIRBuilder &IB)
virtual void	mutate (BasicBlock &BB, RandomIRBuilder &IB)
virtual void	mutate (Instruction &I, RandomIRBuilder &IB)
Public Member Functions inherited from llvm::IRMutationStrategy
virtual	~IRMutationStrategy ()=default
virtual uint64_t	getWeight (size_t CurrentSize, size_t MaxSize, uint64_t CurrentWeight)=0
	Provide a weight to bias towards choosing this strategy for a mutation.

Detailed Description

Strategy that modifies instruction attributes and operands.

Definition at line 123 of file IRMutator.h.

Member Function Documentation

getWeight()

uint64_t llvm::InstModificationIRStrategy::getWeight ( size_t  CurrentSize, size_t  MaxSize, uint64_t  CurrentWeight  )

inlineoverridevirtual

Provide a weight to bias towards choosing this strategy for a mutation.

The value of the weight is arbitrary, but a good default is "the number of distinct ways in which this strategy can mutate a unit". This can also be used to prefer strategies that shrink the overall size of the result when we start getting close to MaxSize.

Implements llvm::IRMutationStrategy.

Definition at line 125 of file IRMutator.h.

mutate() [1/5]

void IRMutationStrategy::mutate ( BasicBlock &  BB, RandomIRBuilder &  IB  )

virtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 53 of file IRMutator.cpp.

mutate() [2/5]

void IRMutationStrategy::mutate ( Function &  F, RandomIRBuilder &  IB  )

virtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 52 of file IRMutator.cpp.

mutate() [3/5]

virtual void llvm::IRMutationStrategy::mutate ( Instruction &  I, RandomIRBuilder &  IB  )

inlinevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 54 of file IRMutator.h.

mutate() [4/5]

void InstModificationIRStrategy::mutate ( Instruction &  Inst, RandomIRBuilder &  IB  )

overridevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 221 of file IRMutator.cpp.

References llvm::FastMathFlags::all(), llvm::CallingConv::C, llvm::CmpInst::FIRST_FCMP_PREDICATE, llvm::CmpInst::FIRST_ICMP_PREDICATE, GEP, llvm::Instruction::getFastMathFlags(), llvm::Instruction::getOpcode(), llvm::User::getOperand(), llvm::Instruction::hasAllowContract(), llvm::Instruction::hasAllowReassoc(), llvm::Instruction::hasAllowReciprocal(), llvm::Instruction::hasApproxFunc(), llvm::Instruction::hasNoInfs(), llvm::Instruction::hasNoNaNs(), llvm::Instruction::hasNoSignedWrap(), llvm::Instruction::hasNoSignedZeros(), llvm::Instruction::hasNoUnsignedWrap(), llvm::Instruction::isExact(), llvm::CmpInst::LAST_FCMP_PREDICATE, llvm::CmpInst::LAST_ICMP_PREDICATE, llvm::makeSampler(), llvm::FastMathFlags::none(), llvm::Instruction::setFast(), llvm::Instruction::setHasAllowContract(), llvm::Instruction::setHasAllowReassoc(), llvm::Instruction::setHasAllowReciprocal(), llvm::Instruction::setHasApproxFunc(), llvm::Instruction::setHasNoInfs(), llvm::Instruction::setHasNoNaNs(), llvm::Instruction::setHasNoSignedWrap(), llvm::Instruction::setHasNoSignedZeros(), llvm::Instruction::setHasNoUnsignedWrap(), llvm::Instruction::setIsExact(), llvm::User::setOperand(), and llvm::CmpInst::setPredicate().

mutate() [5/5]

void IRMutationStrategy::mutate ( Module &  M, RandomIRBuilder &  IB  )

virtual

Mutators for each IR unit. By default these forward to a contained instance of the next smaller unit.

Reimplemented from llvm::IRMutationStrategy.

Definition at line 51 of file IRMutator.cpp.

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

• include/llvm/FuzzMutate/IRMutator.h
• lib/FuzzMutate/IRMutator.cpp