Strategy to randomly select a block and shuffle the operations without affecting data dependency. More...

#include "llvm/FuzzMutate/IRMutator.h"

Inheritance diagram for llvm::ShuffleBlockStrategy:

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 (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 randomly select a block and shuffle the operations without affecting data dependency.

Definition at line 194 of file IRMutator.h.

Member Function Documentation

◆ getWeight()

uint64_t llvm::ShuffleBlockStrategy::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 196 of file IRMutator.h.

◆ mutate()

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

overridevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 593 of file IRMutator.cpp.

References llvm::SmallSet< T, N, C >::empty(), llvm::BasicBlock::getFirstInsertionPt(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::BasicBlock::getTerminator(), I, llvm::SmallSet< T, N, C >::insert(), llvm::make_early_inc_range(), llvm::make_range(), P, and llvm::SmallVectorTemplateBase< T, bool >::push_back().

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

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

Public Member Functions

Detailed Description

Member Function Documentation

◆ getWeight()

◆ mutate()