org.graalvm.compiler.hotspot.nodes.type

Class HotSpotNarrowOopStamp

java.lang.Object

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

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

org.graalvm.compiler.core.common.type.AbstractObjectStamp

org.graalvm.compiler.nodes.type.NarrowOopStamp

org.graalvm.compiler.hotspot.nodes.type.HotSpotNarrowOopStamp

All Implemented Interfaces:

SpeculationReasonGroup.SpeculationContextObject

public final class HotSpotNarrowOopStamp
extends NarrowOopStamp

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
static Stamp	compressed(AbstractObjectStamp stamp, CompressEncoding encoding)
protected AbstractObjectStamp	copyWith(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull, boolean alwaysArray)
boolean	isCompatible(Constant other) Check that the constant other is compatible with this stamp.
static Stamp	mkStamp(CompressionNode.CompressionOp op, Stamp input, CompressEncoding encoding)
JavaConstant	nullConstant()
Constant	readConstant(MemoryAccessProvider provider, Constant base, long displacement) Read a value of this stamp from memory.

Methods inherited from class org.graalvm.compiler.nodes.type.NarrowOopStamp

accept, equals, getEncoding, getLIRKind, hashCode, isCompressed, toString, uncompressed

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

appendString, asAlwaysArray, constant, copyWith, empty, getStackKind, hasValues, improveWith, isAlwaysArray, isConcreteType, isExactType, javaType, join, meet, type, unrestricted

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

alwaysNull, asAlwaysNull, asConstant, asMaybeNull, asNonNull, defaultPointerJoin, nonNull, pointerAlwaysNull, pointerMaybeNull, pointerNonNull

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

copyWith

protected AbstractObjectStamp copyWith(ResolvedJavaType type,
                                       boolean exactType,
                                       boolean nonNull,
                                       boolean alwaysNull,
                                       boolean alwaysArray)

Specified by:

copyWith in class NarrowOopStamp

compressed

public static Stamp compressed(AbstractObjectStamp stamp,
                               CompressEncoding encoding)

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 NarrowOopStamp

Returns:

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

nullConstant

public JavaConstant nullConstant()

Overrides:

nullConstant in class AbstractPointerStamp

isCompatible

public boolean isCompatible(Constant other)

Description copied from class: Stamp

Check that the constant other is compatible with this stamp.

Specified by:

isCompatible in class NarrowOopStamp

mkStamp

public static Stamp mkStamp(CompressionNode.CompressionOp op,
                            Stamp input,
                            CompressEncoding encoding)