Strategy to select a random instruction and add a new sink (user) to it to increate data dependency. More...

#include "llvm/FuzzMutate/IRMutator.h"

Inheritance diagram for llvm::SinkInstructionStrategy:

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 (Function &F, RandomIRBuilder &IB) override

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 (Instruction &I, RandomIRBuilder &IB)

Detailed Description

Strategy to select a random instruction and add a new sink (user) to it to increate data dependency.

Definition at line 181 of file IRMutator.h.

Member Function Documentation

◆ getWeight()

uint64_t llvm::SinkInstructionStrategy::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 183 of file IRMutator.h.