LLVM 20.0.0git
Public Member Functions | List of all members
llvm::SinkInstructionStrategy Class Reference

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:
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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.

◆ mutate() [1/2]

void SinkInstructionStrategy::mutate ( BasicBlock BB,
RandomIRBuilder IB 
)
overridevirtual

◆ mutate() [2/2]

void SinkInstructionStrategy::mutate ( Function F,
RandomIRBuilder IB 
)
overridevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 570 of file IRMutator.cpp.

References F, and mutate().

Referenced by mutate().


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