ControlFlowGraphTransform Class Reference

Base class for ControlFlowGraphTransform transformations. More...

#include "cfg_transform.h"

Inheritance diagram for ControlFlowGraphTransform:

Public Member Functions
	ControlFlowGraphTransform (const std::shared_ptr< ControlFlowGraph > &cfg)
	Constructor. More...
std::shared_ptr< ControlFlowGraph >	get_orig_cfg ()
	Get a shared pointer to the original ControlFlowGraph. More...
virtual std::shared_ptr< ControlFlowGraph >	transform_cfg ()
	Transform the original ControlFlowGraph. More...
virtual std::shared_ptr< InstructionSequence >	transform_basic_block (std::shared_ptr< InstructionSequence > orig_bb)=0
	Create a transformed version of the instructions in a basic block. More...

Detailed Description

Base class for ControlFlowGraphTransform transformations.

This is the preferred way to implement local optimizations. In general, implementations of ControlFlowGraphTransform are intended to be nondestructive, meaning that they return a new result ControlFlowGraph without modifying the original one.

Constructor & Destructor Documentation

ControlFlowGraphTransform()

ControlFlowGraphTransform::ControlFlowGraphTransform

(

const std::shared_ptr< ControlFlowGraph > &

cfg

)

Constructor.

Parameters

cfg	the ControlFlowGraph to transform

Member Function Documentation

get_orig_cfg()

std::shared_ptr< ControlFlowGraph > ControlFlowGraphTransform::get_orig_cfg

(

)

Get a shared pointer to the original ControlFlowGraph.

Returns

the original ControlFlowGraph

transform_basic_block()

virtual std::shared_ptr<InstructionSequence> ControlFlowGraphTransform::transform_basic_block ( std::shared_ptr< InstructionSequence >  orig_bb )

pure virtual

Create a transformed version of the instructions in a basic block.

Note that an InstructionSequence "owns" the Instruction objects it contains, and is responsible for deleting them. Therefore, be careful to avoid having two InstructionSequences contain pointers to the same Instruction. If you need to make an exact copy of an Instruction object, you can do so using the duplicate() member function, as follows:

Instruction *orig_ins = // ...an Instruction object...
Instruction *dup_ins = orig_ins->duplicate();

Parameters

orig_bb

the original basic block

Returns

shared pointer to the new basic block InstructionSequence

Implemented in PeepholeLowLevel.

transform_cfg()

std::shared_ptr< ControlFlowGraph > ControlFlowGraphTransform::transform_cfg ( )

virtual

Transform the original ControlFlowGraph.

Returns

shared pointer to the transformed ControlFlowGraph

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

• cfg_transform.h
• cfg_transform.cpp