org.jikesrvm.compilers.opt.lir2mir

Class SplitBasicBlock

java.lang.Object

org.jikesrvm.compilers.opt.driver.CompilerPhase

org.jikesrvm.compilers.opt.lir2mir.SplitBasicBlock

public final class SplitBasicBlock
extends CompilerPhase

Splits a large basic block into smaller ones with size <= OptOptions.L2M_MAX_BLOCK_SIZE

Field Summary

Fields inherited from class org.jikesrvm.compilers.opt.driver.CompilerPhase

container

Constructor Summary

Constructors

Constructor and Description
SplitBasicBlock()

Method Summary

Modifier and Type	Method and Description
String	getName()
CompilerPhase	newExecution(IR ir) This method is called immediately before performPhase.
void	perform(IR ir) This is the method that actually does the work of the phase.
(package private) BasicBlock	splitEachBlock(BasicBlock bb, IR ir) Splits a basic block.

Methods inherited from class org.jikesrvm.compilers.opt.driver.CompilerPhase

dumpIR, dumpIR, getClassConstructor, getCompilerPhaseConstructor, getCompilerPhaseConstructor, performPhase, printingEnabled, reportAdditionalStats, setContainer, shouldPerform, verify

Methods inherited from class java.lang.Object

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

Constructor Detail

SplitBasicBlock

public SplitBasicBlock()

Method Detail

getName

public String getName()

Specified by:

getName in class CompilerPhase

Returns:

a String which is the name of the phase.

newExecution

public CompilerPhase newExecution(IR ir)

Description copied from class: CompilerPhase

This method is called immediately before performPhase. Phases that do not need to create a new instance for each execution may override this method to return this, but this must be done carefully! Classes that don't override this method need to override getClassConstructor.

Overrides:

newExecution in class CompilerPhase

Parameters:

ir - the IR that is about to be passed to performPhase

Returns:

an opt compiler phase on which performPhase may be invoked.

perform

public void perform(IR ir)

Description copied from class: CompilerPhase

This is the method that actually does the work of the phase.

Specified by:

perform in class CompilerPhase

Parameters:

ir - the IR on which to apply the phase

splitEachBlock

BasicBlock splitEachBlock(BasicBlock bb,
                          IR ir)

Splits a basic block.

Parameters:

bb - the block to process

ir - the IR that contains the block

Returns:

null if no splitting is done, returns the second block if splitting is done.