org.jikesrvm.compilers.opt.regalloc

Class UpdateOSRMaps

java.lang.Object

org.jikesrvm.compilers.opt.driver.CompilerPhase

org.jikesrvm.compilers.opt.regalloc.UpdateOSRMaps

public final class UpdateOSRMaps
extends CompilerPhase

Update GC maps after register allocation but before inserting spill code.

Field Summary

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

container

Constructor Summary

Constructors

Constructor and Description
UpdateOSRMaps()

Method Summary

Modifier and Type	Method and Description
String	getName()
CompilerPhase	newExecution(IR ir) Return this instance of this phase.
void	perform(IR ir) Iterate over the IR-based OSR map, and update symbolic registers with real reg number or spill locations.
boolean	printingEnabled(OptOptions options, boolean before) Returns true if the phase wants the IR dumped before and/or after it runs.
(package private) void	setRealPosition(IR ir, LocalRegPair tuple, Register sym_reg)
(package private) static void	setTupleValue(LocalRegPair tuple, byte type, int value)
(package private) static void	setTupleValue(LocalRegPair tuple, byte type, Word value)
boolean	shouldPerform(OptOptions options) This method determines if the phase should be run, based on the Options object it is passed.

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

UpdateOSRMaps

public UpdateOSRMaps()

Method Detail

shouldPerform

public 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

newExecution

public CompilerPhase newExecution(IR ir)

Return this instance of this phase. This phase contains no per-compilation instance fields.

Overrides:

newExecution in class CompilerPhase

Parameters:

ir - not used

Returns:

this

getName

public String getName()

Specified by:

getName in class CompilerPhase

Returns:

a String which is the name of the phase.

printingEnabled

public boolean printingEnabled(OptOptions options,
                               boolean before)

Description copied from class: CompilerPhase

Returns true if the phase wants the IR dumped before and/or after it runs. By default, printing is not enabled. Subclasses should override this method if they want to provide IR dumping.

Overrides:

printingEnabled in class CompilerPhase

Parameters:

options - the compiler options for the compilation

before - true when invoked before perform, false otherwise.

Returns:

true if the IR should be printed, false otherwise.

perform

public void perform(IR ir)
             throws OptimizingCompilerException

Iterate over the IR-based OSR map, and update symbolic registers with real reg number or spill locations. Verify there are only two types of operands: ConstantOperand RegisterOperand for integer constant, we save the value of the integer The LONG register has another half part. CodeSpill replaces any allocated symbolic register by physical registers.

Specified by:

perform in class CompilerPhase

Parameters:

ir - the IR on which to apply the phase

Throws:

OptimizingCompilerException

setRealPosition

void setRealPosition(IR ir,
                     LocalRegPair tuple,
                     Register sym_reg)

setTupleValue

static void setTupleValue(LocalRegPair tuple,
                          byte type,
                          int value)

setTupleValue

static void setTupleValue(LocalRegPair tuple,
                          byte type,
                          Word value)