llvm::InsertCFGStrategy Class Reference

Strategy to split a random block and insert a random CFG in between. More...

#include "llvm/FuzzMutate/IRMutator.h"

Inheritance diagram for llvm::InsertCFGStrategy:

Public Member Functions
	InsertCFGStrategy (uint64_t MNC=8)
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 (BasicBlock &BB, RandomIRBuilder &IB) override
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.
virtual void	mutate (Module &M, RandomIRBuilder &IB)
virtual void	mutate (Function &F, RandomIRBuilder &IB)
virtual void	mutate (Instruction &I, RandomIRBuilder &IB)

Detailed Description

Strategy to split a random block and insert a random CFG in between.

Definition at line 149 of file IRMutator.h.

Constructor & Destructor Documentation

InsertCFGStrategy()

llvm::InsertCFGStrategy::InsertCFGStrategy ( uint64_t  MNC = 8 )

inline

Definition at line 155 of file IRMutator.h.

Member Function Documentation

getWeight()

uint64_t llvm::InsertCFGStrategy::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 156 of file IRMutator.h.

mutate()

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

overridevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 423 of file IRMutator.cpp.

References assert(), llvm::Block, Blocks, llvm::CallingConv::C, Cond, llvm::BranchInst::Create(), llvm::BasicBlock::Create(), llvm::SwitchInst::Create(), F, llvm::IntegerType::getBitWidth(), getInsertionRange(), llvm::Type::getInt1Ty(), llvm::BasicBlock::getParent(), getUniqueCaseValue(), I, llvm::make_filter_range(), llvm::makeSampler(), llvm::fuzzerop::onlyType(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::ReplaceInstWithInst(), llvm::SmallVectorBase< Size_T >::size(), and llvm::ArrayRef< T >::slice().

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

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