org.graalvm.compiler.hotspot.nodes.type

Class KlassPointerStamp

java.lang.Object

org.graalvm.compiler.core.common.type.Stamp

org.graalvm.compiler.core.common.type.AbstractPointerStamp

org.graalvm.compiler.hotspot.nodes.type.MetaspacePointerStamp

org.graalvm.compiler.hotspot.nodes.type.KlassPointerStamp

All Implemented Interfaces:

SpeculationReasonGroup.SpeculationContextObject

public final class KlassPointerStamp
extends MetaspacePointerStamp

Nested Class Summary

Nested classes/interfaces inherited from interface org.graalvm.compiler.serviceprovider.SpeculationReasonGroup.SpeculationContextObject

SpeculationReasonGroup.SpeculationContextObject.Visitor

Method Summary

Modifier and Type	Method and Description
void	accept(SpeculationReasonGroup.SpeculationContextObject.Visitor v)
KlassPointerStamp	compressed(CompressEncoding newEncoding)
Stamp	constant(Constant c, MetaAccessProvider meta) If it is possible to represent single value stamps of this kind, this method returns the stamp representing the single value c.
protected AbstractPointerStamp	copyWith(boolean newNonNull, boolean newAlwaysNull)
boolean	equals(Object obj)
CompressEncoding	getEncoding()
LIRKind	getLIRKind(LIRKindTool tool) Gets a platform dependent LIRKind that can be used to store a value of this stamp.
int	hashCode()
boolean	isCompatible(Constant constant) Check that the constant other is compatible with this stamp.
boolean	isCompatible(Stamp otherStamp) Check that the constant other is compatible with this stamp.
boolean	isCompressed()
static KlassPointerStamp	klass()
static KlassPointerStamp	klassAlwaysNull()
static KlassPointerStamp	klassNonNull()
JavaConstant	nullConstant()
Constant	readConstant(MemoryAccessProvider provider, Constant base, long displacement) Read a value of this stamp from memory.
String	toString()
KlassPointerStamp	uncompressed()

Methods inherited from class org.graalvm.compiler.hotspot.nodes.type.MetaspacePointerStamp

appendString, empty, hasValues, javaType, join

Methods inherited from class org.graalvm.compiler.core.common.type.AbstractPointerStamp

alwaysNull, asAlwaysNull, asConstant, asMaybeNull, asNonNull, defaultPointerJoin, getStackKind, improveWith, meet, nonNull, pointerAlwaysNull, pointerMaybeNull, pointerNonNull, unrestricted

Methods inherited from class org.graalvm.compiler.core.common.type.Stamp

alwaysDistinct, isEmpty, isPointerStamp, isUnrestricted, makeSymbolic, neverDistinct, readConstant, tryImproveWith

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, wait, wait, wait

Method Detail

klass

public static KlassPointerStamp klass()

klassNonNull

public static KlassPointerStamp klassNonNull()

klassAlwaysNull

public static KlassPointerStamp klassAlwaysNull()

accept

public void accept(SpeculationReasonGroup.SpeculationContextObject.Visitor v)

Specified by:

accept in interface SpeculationReasonGroup.SpeculationContextObject

Overrides:

accept in class AbstractPointerStamp

copyWith

protected AbstractPointerStamp copyWith(boolean newNonNull,
                                        boolean newAlwaysNull)

Specified by:

copyWith in class AbstractPointerStamp

isCompatible

public boolean isCompatible(Stamp otherStamp)

Description copied from class: Stamp

Check that the constant other is compatible with this stamp.

Overrides:

isCompatible in class MetaspacePointerStamp

isCompatible

public boolean isCompatible(Constant constant)

Description copied from class: Stamp

Check that the constant other is compatible with this stamp.

Overrides:

isCompatible in class MetaspacePointerStamp

constant

public Stamp constant(Constant c,
                      MetaAccessProvider meta)

Description copied from class: Stamp

If it is possible to represent single value stamps of this kind, this method returns the stamp representing the single value c. stamp.constant(c).asConstant() should be equal to c.

If it is not possible to represent single value stamps, this method returns a stamp that includes c, and is otherwise as narrow as possible.

Specified by:

constant in class Stamp

nullConstant

public JavaConstant nullConstant()

Overrides:

nullConstant in class AbstractPointerStamp

getLIRKind

public LIRKind getLIRKind(LIRKindTool tool)

Description copied from class: Stamp

Gets a platform dependent LIRKind that can be used to store a value of this stamp.

Overrides:

getLIRKind in class MetaspacePointerStamp

isCompressed

public boolean isCompressed()

Overrides:

isCompressed in class AbstractPointerStamp

getEncoding

public CompressEncoding getEncoding()

compressed

public KlassPointerStamp compressed(CompressEncoding newEncoding)

uncompressed

public KlassPointerStamp uncompressed()

readConstant

public Constant readConstant(MemoryAccessProvider provider,
                             Constant base,
                             long displacement)

Description copied from class: Stamp

Read a value of this stamp from memory.

Specified by:

readConstant in class Stamp

Returns:

the value read or null if the value can't be read for some reason.

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractPointerStamp

equals

public boolean equals(Object obj)

Overrides:

equals in class AbstractPointerStamp

toString

public String toString()

Specified by:

toString in class Stamp