jdk.internal.jvmci.meta

Class JavaTypeProfile

java.lang.Object

jdk.internal.jvmci.meta.AbstractJavaProfile<JavaTypeProfile.ProfiledType,ResolvedJavaType>

jdk.internal.jvmci.meta.JavaTypeProfile

public final class JavaTypeProfile
extends AbstractJavaProfile<JavaTypeProfile.ProfiledType,ResolvedJavaType>

This profile object represents the type profile at a specific BCI. The precision of the supplied values may vary, but a runtime that provides this information should be aware that it will be used to guide performance-critical decisions like speculative inlining, etc.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JavaTypeProfile.ProfiledType

Field Summary

Fields

Modifier and Type	Field and Description
private static JavaTypeProfile.ProfiledType[]	EMPTY_ARRAY
private TriState	nullSeen

Constructor Summary

Constructors

Constructor and Description
JavaTypeProfile(TriState nullSeen, double notRecordedProbability, JavaTypeProfile.ProfiledType[] pitems)

Method Summary

Modifier and Type	Method and Description
boolean	allTypesRecorded() Returns true if all types seen at this location have been recorded in the profile.
ResolvedJavaType	asSingleType() Returns the single monormorphic type representing this profile or null if no such type exists.
private JavaTypeProfile	createAdjustedProfile(ArrayList<JavaTypeProfile.ProfiledType> result, TriState newNullSeen, double newNotRecorded)
boolean	equals(Object other)
TriState	getNullSeen() Returns whether a null value was at the type check.
JavaTypeProfile.ProfiledType[]	getTypes() A list of types for which the runtime has recorded probability information.
int	hashCode()
JavaTypeProfile	restrict(JavaTypeProfile otherProfile)
JavaTypeProfile	restrict(ResolvedJavaType declaredType, boolean nonNull)
String	toString()

Methods inherited from class jdk.internal.jvmci.meta.AbstractJavaProfile

findEntry, getItems, getNotRecordedProbability, isIncluded

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_ARRAY

private static final JavaTypeProfile.ProfiledType[] EMPTY_ARRAY

nullSeen

private final TriState nullSeen

Constructor Detail

JavaTypeProfile

public JavaTypeProfile(TriState nullSeen,
                       double notRecordedProbability,
                       JavaTypeProfile.ProfiledType[] pitems)

Method Detail

getNullSeen

public TriState getNullSeen()

Returns whether a null value was at the type check.

getTypes

public JavaTypeProfile.ProfiledType[] getTypes()

A list of types for which the runtime has recorded probability information. Note that this includes both positive and negative types where a positive type is a subtype of the checked type and a negative type is not.

restrict

public JavaTypeProfile restrict(JavaTypeProfile otherProfile)

restrict

public JavaTypeProfile restrict(ResolvedJavaType declaredType,
                                boolean nonNull)

createAdjustedProfile

private JavaTypeProfile createAdjustedProfile(ArrayList<JavaTypeProfile.ProfiledType> result,
                                              TriState newNullSeen,
                                              double newNotRecorded)

equals

public boolean equals(Object other)

Overrides:

equals in class AbstractJavaProfile<JavaTypeProfile.ProfiledType,ResolvedJavaType>

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractJavaProfile<JavaTypeProfile.ProfiledType,ResolvedJavaType>

toString

public String toString()

Overrides:

toString in class AbstractJavaProfile<JavaTypeProfile.ProfiledType,ResolvedJavaType>

allTypesRecorded

public boolean allTypesRecorded()

Returns true if all types seen at this location have been recorded in the profile.

asSingleType

public ResolvedJavaType asSingleType()

Returns the single monormorphic type representing this profile or null if no such type exists.