org.graalvm.compiler.hotspot.replacements

Class HubGetClassNode

java.lang.Object

org.graalvm.compiler.graph.Node

org.graalvm.compiler.nodes.ValueNode

org.graalvm.compiler.nodes.calc.FloatingNode

org.graalvm.compiler.hotspot.replacements.HubGetClassNode

All Implemented Interfaces:

Cloneable, Formattable, Node.ValueNumberable, CanonicalizableMarker, ConvertNode, HubGetClassNodeInterface, Canonicalizable, Lowerable, ValueNodeInterface

public final class HubGetClassNode
extends FloatingNode
implements Lowerable, Canonicalizable, ConvertNode, HubGetClassNodeInterface

Read Klass::_java_mirror and incorporate non-null type information into stamp. This is also used by ClassGetHubNode to eliminate chains of klass._java_mirror._klass.

Nested Class Summary

Nested classes/interfaces inherited from class org.graalvm.compiler.graph.Node

Node.ConstantNodeParameter, Node.EdgeVisitor, Node.IndirectCanonicalization, Node.InjectedNodeParameter, Node.Input, Node.NodeInsertionStackTrace, Node.NodeIntrinsic, Node.NodeIntrinsicFactory, Node.OptionalInput, Node.Successor, Node.ValueNumberable

Nested classes/interfaces inherited from interface org.graalvm.compiler.nodes.spi.Canonicalizable

Canonicalizable.Binary<T extends Node>, Canonicalizable.BinaryCommutative<T extends Node>, Canonicalizable.Ternary<T extends Node>, Canonicalizable.Unary<T extends Node>

Field Summary

Fields

Modifier and Type	Field and Description
protected ValueNode	hub
static NodeClass<HubGetClassNode>	TYPE

Fields inherited from class org.graalvm.compiler.nodes.ValueNode

EMPTY_ARRAY, stamp

Fields inherited from class org.graalvm.compiler.graph.Node

NODE_LIST, NOT_ITERABLE, TRACK_CREATION_POSITION, WithAllEdges, WithNoEdges, WithOnlyInputEdges, WithOnlySucessorEdges

Constructor Summary

Constructors

Constructor and Description
HubGetClassNode(MetaAccessProvider metaAccess, ValueNode hub)

Method Summary

Modifier and Type	Method and Description
Node	canonical(CanonicalizerTool tool) Implementations of this method can provide local optimizations like constant folding and strength reduction.
Constant	convert(Constant c, ConstantReflectionProvider constantReflection)
ValueNode	getHub()
ValueNode	getValue()
boolean	isLossless() Any concrete Klass* has a corresponding Class.
boolean	mayNullCheckSkipConversion() Checks whether a null check may skip the conversion.
static Class<?>	readClass(KlassPointer hub)
Constant	reverse(Constant c, ConstantReflectionProvider constantReflection)

Methods inherited from class org.graalvm.compiler.nodes.ValueNode

asConstant, asJavaConstant, asNode, asSerializableConstant, checkReplaceAtUsagesInvariants, getStackKind, graph, hasUsagesOtherThan, inferStamp, isAllowedUsageType, isConstant, isConstantPredicate, isDefaultConstant, isIllegalConstant, isJavaConstant, isNullConstant, isSerializableConstant, recursivelyDataFlowEqualsUpTo, setStamp, stamp, updateStamp, updateUsagesInterface

Methods inherited from class org.graalvm.compiler.graph.Node

afterClone, applyInputs, applySuccessors, assertFalse, assertTrue, cfgPredecessors, cfgSuccessors, clearInputs, clearNodeSourcePosition, clearSuccessors, copyWithInputs, copyWithInputs, dataFlowEquals, dynamicNodeSizeEstimate, estimatedNodeCycles, estimatedNodeSize, fail, formatTo, getCreationPosition, getDebug, getDebugProperties, getDebugProperties, getInsertionPosition, getNodeClass, getNodeSourcePosition, getOptions, getUsageCount, hasExactlyOneUsage, hashCode, hasMoreThanOneUsage, hasNoUsages, hasOnlyUsagesOfType, hasUsages, hasUsagesOfType, inputPositions, inputs, isAlive, isDeleted, isUnregistered, markDeleted, maybeNotifyZeroUsages, modCount, predecessor, pushInputs, removeUsage, replaceAllInputs, replaceAndDelete, replaceAtAllUsages, replaceAtMatchingUsages, replaceAtPredecessor, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsagesAndDelete, replaceAtUsagesAndDelete, replaceFirstInput, replaceFirstSuccessor, safeDelete, setCreationPosition, setInsertionPosition, setNodeSourcePosition, singleUsage, successorPositions, successors, toString, toString, updateNodeSourcePosition, updatePredecessor, updateUsages, usages, valueEquals, verify, verifyEdges, verifyInputs, verifySourcePosition, withNodeSourcePosition

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.graalvm.compiler.nodes.spi.Lowerable

lower

Methods inherited from interface org.graalvm.compiler.nodes.calc.ConvertNode

preservesOrder, preservesOrder

Methods inherited from interface org.graalvm.compiler.nodes.ValueNodeInterface

asNode

Field Detail

TYPE

public static final NodeClass<HubGetClassNode> TYPE

hub

protected ValueNode hub

Constructor Detail

HubGetClassNode

public HubGetClassNode(MetaAccessProvider metaAccess,
                       ValueNode hub)

Method Detail

getHub

public ValueNode getHub()

Specified by:

getHub in interface HubGetClassNodeInterface

canonical

public Node canonical(CanonicalizerTool tool)

Description copied from interface: Canonicalizable

Implementations of this method can provide local optimizations like constant folding and strength reduction. Implementations should look at the properties and inputs of the current node and determine if there is a more optimal and always semantically correct replacement.
The return value determines the effect that the canonicalization will have:

• Returning an pre-existing node will replace the current node with the given one.
• Returning a newly created node (that was not yet added to the graph) will replace the current node with the given one, after adding it to the graph. If both the replacement and the replacee are anchored in control flow (fixed nodes), the replacement will be added to the control flow. It is invalid to replace a non-fixed node with a newly created fixed node (because its placement in the control flow cannot be determined without scheduling).
• Returning null will delete the current node and replace it with null at all usages. Note that it is not necessary to delete floating nodes that have no more usages this way - they will be deleted automatically.

Specified by:

canonical in interface Canonicalizable

Parameters:

tool - provides access to runtime interfaces like MetaAccessProvider

readClass

public static Class<?> readClass(KlassPointer hub)

getValue

public ValueNode getValue()

Specified by:

getValue in interface ConvertNode

convert

public Constant convert(Constant c,
                        ConstantReflectionProvider constantReflection)

Specified by:

convert in interface ConvertNode

reverse

public Constant reverse(Constant c,
                        ConstantReflectionProvider constantReflection)

Specified by:

reverse in interface ConvertNode

isLossless

public boolean isLossless()

Any concrete Klass* has a corresponding Class.

Specified by:

isLossless in interface ConvertNode

Returns:

true iff reverse(convert(c)) == c for all c

mayNullCheckSkipConversion

public boolean mayNullCheckSkipConversion()

Description copied from interface: ConvertNode

Checks whether a null check may skip the conversion. This is true if in the conversion NULL is converted to NULL and if it is the only value converted to NULL.

Specified by:

mayNullCheckSkipConversion in interface ConvertNode

Returns:

whether a null check may skip the conversion