com.oracle.graal.hotspot.nodes.type

Class NarrowOopStamp

java.lang.Object

com.oracle.graal.compiler.common.type.Stamp

com.oracle.graal.compiler.common.type.AbstractPointerStamp

com.oracle.graal.compiler.common.type.AbstractObjectStamp

com.oracle.graal.hotspot.nodes.type.NarrowOopStamp

public class NarrowOopStamp
extends AbstractObjectStamp

Field Summary

Fields

Modifier and Type	Field and Description
private HotSpotVMConfig.CompressEncoding	encoding

Constructor Summary

Constructors

Constructor and Description
NarrowOopStamp(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull, HotSpotVMConfig.CompressEncoding encoding)

Method Summary

Modifier and Type	Method and Description
JavaConstant	asConstant() If this stamp represents a single value, the methods returns this single value.
static Stamp	compressed(AbstractObjectStamp stamp, HotSpotVMConfig.CompressEncoding encoding)
protected AbstractObjectStamp	copyWith(ResolvedJavaType type, boolean exactType, boolean nonNull, boolean alwaysNull)
boolean	equals(Object obj)
HotSpotVMConfig.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(Stamp other) Test whether two stamps have the same base type.
Constant	readConstant(MemoryAccessProvider provider, Constant base, long displacement) Read a value of this stamp from memory.
String	toString()
Stamp	uncompressed()

Methods inherited from class com.oracle.graal.compiler.common.type.AbstractObjectStamp

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

Methods inherited from class com.oracle.graal.compiler.common.type.AbstractPointerStamp

alwaysNull, nonNull

Methods inherited from class com.oracle.graal.compiler.common.type.Stamp

alwaysDistinct, isEmpty, neverDistinct, tryImproveWith

Methods inherited from class java.lang.Object

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

Field Detail

encoding

private final HotSpotVMConfig.CompressEncoding encoding

Constructor Detail

NarrowOopStamp

public NarrowOopStamp(ResolvedJavaType type,
                      boolean exactType,
                      boolean nonNull,
                      boolean alwaysNull,
                      HotSpotVMConfig.CompressEncoding encoding)

Method Detail

copyWith

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

Specified by:

copyWith in class AbstractObjectStamp

compressed

public static Stamp compressed(AbstractObjectStamp stamp,
                               HotSpotVMConfig.CompressEncoding encoding)

uncompressed

public Stamp uncompressed()

getEncoding

public HotSpotVMConfig.CompressEncoding getEncoding()

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.

Specified by:

getLIRKind in class Stamp

toString

public String toString()

Overrides:

toString in class Object

isCompatible

public boolean isCompatible(Stamp other)

Description copied from class: Stamp

Test whether two stamps have the same base type.

Specified by:

isCompatible in class Stamp

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

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractObjectStamp

equals

public boolean equals(Object obj)

Overrides:

equals in class AbstractObjectStamp

asConstant

public JavaConstant asConstant()

Description copied from class: Stamp

If this stamp represents a single value, the methods returns this single value. It returns null otherwise.

Overrides:

asConstant in class AbstractPointerStamp

Returns:

the constant corresponding to the single value of this stamp and null if this stamp can represent less or more than one value.