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org.jikesrvm.compilers.opt.regalloc
Class LinearScan.RegisterRestrictionsPhase

java.lang.Object
  extended by org.jikesrvm.compilers.opt.driver.CompilerPhase
      extended by org.jikesrvm.compilers.opt.regalloc.LinearScan.RegisterRestrictionsPhase
Enclosing class:
LinearScan
static final class LinearScan.RegisterRestrictionsPhase
extends CompilerPhase

A phase to compute register restrictions.

Field Summary
 
Fields inherited from class org.jikesrvm.compilers.opt.driver.CompilerPhase
container
 
Constructor Summary
LinearScan.RegisterRestrictionsPhase()
           
 
Method Summary
 String getName()
           
 CompilerPhase newExecution(IR ir)
          Return this instance of this phase.
 void perform(IR ir)
          This is the method that actually does the work of the phase.
 boolean printingEnabled(OptOptions options, boolean before)
          Returns true if the phase wants the IR dumped before and/or after it runs.
 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

LinearScan.RegisterRestrictionsPhase

LinearScan.RegisterRestrictionsPhase()
Method Detail

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

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

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)
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
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