llvm::InsertPHIStrategy Class Reference

Strategy to insert PHI Nodes at the head of each basic block. More...

#include "llvm/FuzzMutate/IRMutator.h"

Inheritance diagram for llvm::InsertPHIStrategy:

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 void	mutate (Module &M, RandomIRBuilder &IB)
virtual void	mutate (Function &F, RandomIRBuilder &IB)
virtual void	mutate (Instruction &I, RandomIRBuilder &IB)

Detailed Description

Strategy to insert PHI Nodes at the head of each basic block.

Definition at line 170 of file IRMutator.h.

Member Function Documentation

getWeight()

uint64_t llvm::InsertPHIStrategy::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 172 of file IRMutator.h.

mutate()

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

overridevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 628 of file IRMutator.cpp.

References llvm::BasicBlock::begin(), llvm::PHINode::Create(), llvm::Function::getEntryBlock(), getInsertionRange(), llvm::BasicBlock::getParent(), I, llvm::make_pointer_range(), llvm::fuzzerop::onlyType(), PHI, llvm::pred_size(), llvm::predecessors(), and llvm::SmallVectorTemplateBase< T, bool >::push_back().

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

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