com.oracle.graal.lir.amd64

Class AMD64ZapRegistersOp

java.lang.Object

com.oracle.graal.lir.LIRInstruction

com.oracle.graal.lir.amd64.AMD64LIRInstruction

com.oracle.graal.lir.amd64.AMD64ZapRegistersOp

All Implemented Interfaces:

StandardOp.SaveRegistersOp

public final class AMD64ZapRegistersOp
extends AMD64LIRInstruction
implements StandardOp.SaveRegistersOp

Writes well known garbage values to registers.

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.graal.lir.LIRInstruction

LIRInstruction.Alive, LIRInstruction.Def, LIRInstruction.OperandFlag, LIRInstruction.OperandMode, LIRInstruction.State, LIRInstruction.Temp, LIRInstruction.Use

Field Summary

Fields

Modifier and Type	Field and Description
static LIRInstructionClass<AMD64ZapRegistersOp>	TYPE
protected Register[]	zappedRegisters The registers that are zapped.
protected JavaConstant[]	zapValues The garbage values that are written to the registers.

Fields inherited from class com.oracle.graal.lir.LIRInstruction

ADDRESS_FLAGS, ALLOWED_FLAGS

Constructor Summary

Constructors

Constructor and Description
AMD64ZapRegistersOp(Register[] zappedRegisters, JavaConstant[] zapValues)

Method Summary

Modifier and Type	Method and Description
void	emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm)
RegisterSaveLayout	getMap(FrameMap frameMap) Gets a map from the saved registers saved by this operation to the frame slots in which they are saved.
int	remove(Set<Register> doNotSave) Prunes doNotSave from the registers saved by this operation.
boolean	supportsRemove() Determines if the StandardOp.SaveRegistersOp.remove(Set) operation is supported for this object.

Methods inherited from class com.oracle.graal.lir.amd64.AMD64LIRInstruction

emitCode

Methods inherited from class com.oracle.graal.lir.LIRInstruction

destroysCallerSavedRegisters, forEachAlive, forEachAlive, forEachInput, forEachInput, forEachOutput, forEachOutput, forEachRegisterHint, forEachRegisterHint, forEachState, forEachState, forEachState, forEachState, forEachTemp, forEachTemp, getLIRInstructionClass, hasOperands, hasState, id, name, setId, toString, toStringWithIdPrefix, verify, visitEachAlive, visitEachAlive, visitEachInput, visitEachInput, visitEachOutput, visitEachOutput, visitEachState, visitEachState, visitEachTemp, visitEachTemp

Methods inherited from class java.lang.Object

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

Field Detail

TYPE

public static final LIRInstructionClass<AMD64ZapRegistersOp> TYPE

zappedRegisters

protected final Register[] zappedRegisters

The registers that are zapped.

zapValues

protected JavaConstant[] zapValues

The garbage values that are written to the registers.

Constructor Detail

AMD64ZapRegistersOp

public AMD64ZapRegistersOp(Register[] zappedRegisters,
                           JavaConstant[] zapValues)

Method Detail

emitCode

public void emitCode(CompilationResultBuilder crb,
                     AMD64MacroAssembler masm)

Specified by:

emitCode in class AMD64LIRInstruction

supportsRemove

public boolean supportsRemove()

Description copied from interface: StandardOp.SaveRegistersOp

Determines if the StandardOp.SaveRegistersOp.remove(Set) operation is supported for this object.

Specified by:

supportsRemove in interface StandardOp.SaveRegistersOp

remove

public int remove(Set<Register> doNotSave)

Description copied from interface: StandardOp.SaveRegistersOp

Prunes doNotSave from the registers saved by this operation.

Specified by:

remove in interface StandardOp.SaveRegistersOp

Parameters:

doNotSave - registers that should not be saved by this operation

Returns:

the number of registers pruned

getMap

public RegisterSaveLayout getMap(FrameMap frameMap)

Description copied from interface: StandardOp.SaveRegistersOp

Gets a map from the saved registers saved by this operation to the frame slots in which they are saved.

Specified by:

getMap in interface StandardOp.SaveRegistersOp

Parameters:

frameMap - used to convert a virtual slot to a frame slot index