org.jruby.ir.passes

Class DeadCodeElimination

java.lang.Object

org.jruby.ir.passes.CompilerPass

org.jruby.ir.passes.DeadCodeElimination

public class DeadCodeElimination
extends CompilerPass

Field Summary

Fields

Modifier and Type	Field and Description
static List<Class<? extends CompilerPass>>	DEPENDENCIES

Fields inherited from class org.jruby.ir.passes.CompilerPass

NO_DEPENDENCIES

Constructor Summary

Constructors

Constructor and Description
DeadCodeElimination()

Method Summary

Methods

Modifier and Type	Method and Description
Object	execute(IRScope scope, Object... data) Meat of an individual pass.
List<Class<? extends CompilerPass>>	getDependencies()
String	getLabel() What is the user-friendly name of this compiler pass
void	invalidate(IRScope scope) The data that this pass is responsible for will get invalidated so that if this pass is then execute()d it will generate new pass data.

Methods inherited from class org.jruby.ir.passes.CompilerPass

createPassInstance, createPassInstance, getPassesFromString, previouslyRun, run, run

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEPENDENCIES

public static List<Class<? extends CompilerPass>> DEPENDENCIES

Constructor Detail

DeadCodeElimination

public DeadCodeElimination()

Method Detail

getLabel

public String getLabel()

Description copied from class: CompilerPass

What is the user-friendly name of this compiler pass

Specified by:

getLabel in class CompilerPass

getDependencies

public List<Class<? extends CompilerPass>> getDependencies()

Overrides:

getDependencies in class CompilerPass

execute

public Object execute(IRScope scope,
             Object... data)

Description copied from class: CompilerPass

Meat of an individual pass. run will call this after dependency resolution.

Specified by:

execute in class CompilerPass

Parameters:

scope - is the scope to run this pass on

data - is the data supplied to this pass to use to execute the pass

invalidate

public void invalidate(IRScope scope)

Description copied from class: CompilerPass

The data that this pass is responsible for will get invalidated so that if this pass is then execute()d it will generate new pass data. Note that some data will destructively manipulate dependent compiler pass data. In that case, the pass may wipe more than just it's data. In that case an execute() should still rebuild everything fine because all compiler passes list their dependencies.

Specified by:

invalidate in class CompilerPass

Parameters:

scope - is where the pass stores its data.