llvm::InstDeleterIRStrategy Class Reference

Strategy that deletes instructions when the Module is too large. More...

#include "llvm/FuzzMutate/IRMutator.h"

Inheritance diagram for llvm::InstDeleterIRStrategy:

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 (Instruction &Inst, RandomIRBuilder &IB) override
virtual void	mutate (Module &M, RandomIRBuilder &IB)
virtual void	mutate (Function &F, RandomIRBuilder &IB)
virtual void	mutate (BasicBlock &BB, RandomIRBuilder &IB)
virtual void	mutate (Instruction &I, RandomIRBuilder &IB)
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.

Detailed Description

Strategy that deletes instructions when the Module is too large.

Definition at line 112 of file IRMutator.h.

Member Function Documentation

getWeight()

uint64_t InstDeleterIRStrategy::getWeight ( size_t  CurrentSize, size_t  MaxSize, uint64_t  CurrentWeight  )

overridevirtual

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 157 of file IRMutator.cpp.

mutate() [1/6]

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

virtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 53 of file IRMutator.cpp.

mutate() [2/6]

void IRMutationStrategy::mutate ( Function &  F, RandomIRBuilder &  IB  )

virtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 52 of file IRMutator.cpp.

mutate() [3/6]

void InstDeleterIRStrategy::mutate ( Function &  F, RandomIRBuilder &  IB  )

overridevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 174 of file IRMutator.cpp.

References eliminateDeadCode(), F, instructions, and mutate().

Referenced by mutate().

mutate() [4/6]

virtual void llvm::IRMutationStrategy::mutate ( Instruction &  I, RandomIRBuilder &  IB  )

inlinevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 54 of file IRMutator.h.

mutate() [5/6]

void InstDeleterIRStrategy::mutate ( Instruction &  Inst, RandomIRBuilder &  IB  )

overridevirtual

Reimplemented from llvm::IRMutationStrategy.

Definition at line 193 of file IRMutator.cpp.

References assert(), llvm::Instruction::eraseFromParent(), llvm::BasicBlock::getFirstInsertionPt(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::Value::getType(), I, llvm::Instruction::isTerminator(), llvm::Type::isVoidTy(), llvm::fuzzerop::onlyType(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::Value::replaceAllUsesWith().

mutate() [6/6]

void IRMutationStrategy::mutate ( Module &  M, RandomIRBuilder &  IB  )

virtual

Mutators for each IR unit. By default these forward to a contained instance of the next smaller unit.

Reimplemented from llvm::IRMutationStrategy.

Definition at line 51 of file IRMutator.cpp.

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

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