org.jikesrvm.compilers.opt.bc2ir

Class OsrPointConstructor

java.lang.Object

org.jikesrvm.compilers.opt.driver.CompilerPhase

org.jikesrvm.compilers.opt.bc2ir.OsrPointConstructor

public class OsrPointConstructor
extends CompilerPhase

A phase in the OPT compiler for construction OsrPoint instructions after inlining.

Field Summary

Fields

Modifier and Type	Field and Description
private BranchOptimizations	branchOpts Need to run branch optimizations after
private static Constructor<CompilerPhase>	constructor
private Collection<Instruction>	osrBarriers
private LinkedList<Instruction>	osrPoints

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

container

Constructor Summary

Constructors

Constructor and Description
OsrPointConstructor() Constructor

Method Summary

Modifier and Type	Method and Description
private void	adjustBCIndex(Instruction barrier) The OsrBarrier instruction is not in IR, so the bc index was not adjusted in OSR_AdjustBCIndex.
private void	collectOsrPointsAndBarriers(IR ir) Iterates over all instructions in the IR and builds a list of OsrPoint instructions and OsrBarrier instructions.
private int	countNonVoidTypes(byte[] typeCodes)
private void	fixupCFGForOsr(IR ir) Splits each OsrPoint, and connects it to the exit point.
Constructor<CompilerPhase>	getClassConstructor() Get a constructor object for this compiler phase
String	getName()
private boolean	isBarrierClean(Instruction barrier) Determines if the barrier is clean by checking the number of valid operands.
void	perform(IR ir) Goes through each instruction, reconstruct OsrPoint instructions.
private void	removeOsrBarriers(IR ir)
private void	renovateOsrPoints(IR ir) For each OsrPoint instruction, traces its OsrBarriers created by inlining. rebuild OsrPoint instruction to hold all necessary information to recover from inlined activation.
boolean	shouldPerform(OptOptions options) This method determines if the phase should be run, based on the Options object it is passed.
private void	verifyNoOsrBarriers(IR ir)

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

dumpIR, dumpIR, getCompilerPhaseConstructor, getCompilerPhaseConstructor, newExecution, performPhase, printingEnabled, reportAdditionalStats, setContainer, verify

Methods inherited from class java.lang.Object

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

Field Detail

constructor

private static final Constructor<CompilerPhase> constructor

branchOpts

private final BranchOptimizations branchOpts

Need to run branch optimizations after

osrBarriers

private Collection<Instruction> osrBarriers

osrPoints

private LinkedList<Instruction> osrPoints

Constructor Detail

OsrPointConstructor

public OsrPointConstructor()

Constructor

Method Detail

shouldPerform

public final boolean shouldPerform(OptOptions options)

Description copied from class: CompilerPhase

This method determines if the phase should be run, based on the Options object it is passed. By default, phases are always performed. Subclasses should override this method if they only want to be performed conditionally.

Overrides:

shouldPerform in class CompilerPhase

Parameters:

options - the compiler options for the compilation

Returns:

true if the phase should be performed

getName

public final String getName()

Specified by:

getName in class CompilerPhase

Returns:

a String which is the name of the phase.

getClassConstructor

public Constructor<CompilerPhase> getClassConstructor()

Description copied from class: CompilerPhase

Get a constructor object for this compiler phase

Overrides:

getClassConstructor in class CompilerPhase

Returns:

exception/null as this phase can't be created

perform

public void perform(IR ir)

Goes through each instruction, reconstruct OsrPoint instructions.

Specified by:

perform in class CompilerPhase

Parameters:

ir - the IR on which to apply the phase

collectOsrPointsAndBarriers

private void collectOsrPointsAndBarriers(IR ir)

Iterates over all instructions in the IR and builds a list of OsrPoint instructions and OsrBarrier instructions.

Parameters:

ir - the IR

renovateOsrPoints

private void renovateOsrPoints(IR ir)

For each OsrPoint instruction, traces its OsrBarriers created by inlining. rebuild OsrPoint instruction to hold all necessary information to recover from inlined activation.

Parameters:

ir - the IR

adjustBCIndex

private void adjustBCIndex(Instruction barrier)

The OsrBarrier instruction is not in IR, so the bc index was not adjusted in OSR_AdjustBCIndex.

Parameters:

barrier - the OSR barrier instruction

removeOsrBarriers

private void removeOsrBarriers(IR ir)

verifyNoOsrBarriers

private void verifyNoOsrBarriers(IR ir)

isBarrierClean

private boolean isBarrierClean(Instruction barrier)

Determines if the barrier is clean by checking the number of valid operands.

Parameters:

barrier - the instruction to verifiy

Returns:

true if and only if the barrier is clean

countNonVoidTypes

private int countNonVoidTypes(byte[] typeCodes)

fixupCFGForOsr

private void fixupCFGForOsr(IR ir)

Splits each OsrPoint, and connects it to the exit point.

Parameters:

ir - the IR