org.graalvm.compiler.word

Class WordCastNode

java.lang.Object

org.graalvm.compiler.graph.Node

org.graalvm.compiler.nodes.ValueNode

org.graalvm.compiler.nodes.FixedNode

org.graalvm.compiler.nodes.FixedWithNextNode

org.graalvm.compiler.word.WordCastNode

All Implemented Interfaces:

Cloneable, Formattable, CanonicalizableMarker, FixedNodeInterface, FixedWithNextNodeInterface, Canonicalizable, LIRLowerable, ValueNodeInterface

public final class WordCastNode
extends FixedWithNextNode
implements LIRLowerable, Canonicalizable

Casts between Word and Object exposed by the Word.fromAddress(org.graalvm.compiler.nodes.memory.address.AddressNode.Address), Word.objectToTrackedPointer(java.lang.Object), Word.objectToUntrackedPointer(java.lang.Object) and Word.toObject() operations. It has an impact on the pointer maps for the GC, so it must not be scheduled or optimized away.

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
static NodeClass<WordCastNode>	TYPE

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

next

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

Modifier	Constructor and Description
protected	WordCastNode(Stamp stamp, ValueNode input, boolean trackedPointer)

Method Summary

Modifier and Type	Method and Description
static WordCastNode	addressToWord(ValueNode input, JavaKind wordKind)
Node	canonical(CanonicalizerTool tool) Implementations of this method can provide local optimizations like constant folding and strength reduction.
void	generate(NodeLIRBuilderTool generator)
ValueNode	getInput()
boolean	inferStamp() This method can be overridden by subclasses of ValueNode if they need to recompute their stamp if their inputs change.
static WordCastNode	narrowOopToUntrackedWord(ValueNode input, JavaKind wordKind)
static WordCastNode	objectToTrackedPointer(ValueNode input, JavaKind wordKind)
static WordCastNode	objectToUntrackedPointer(ValueNode input, JavaKind wordKind)
static WordCastNode	wordToNarrowObject(ValueNode input, NarrowOopStamp stamp)
static WordCastNode	wordToObject(ValueNode input, JavaKind wordKind)
static WordCastNode	wordToObjectNonNull(ValueNode input, JavaKind wordKind)

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

asFixedWithNextNode, next, setNext

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

asFixedNode, verify

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

asConstant, asJavaConstant, asNode, asSerializableConstant, checkReplaceAtUsagesInvariants, getStackKind, graph, hasUsagesOtherThan, 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, 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.FixedNodeInterface

asFixedNode

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

asNode

Field Detail

TYPE

public static final NodeClass<WordCastNode> TYPE

Constructor Detail

WordCastNode

protected WordCastNode(Stamp stamp,
                       ValueNode input,
                       boolean trackedPointer)

Method Detail

wordToObject

public static WordCastNode wordToObject(ValueNode input,
                                        JavaKind wordKind)

wordToObjectNonNull

public static WordCastNode wordToObjectNonNull(ValueNode input,
                                               JavaKind wordKind)

wordToNarrowObject

public static WordCastNode wordToNarrowObject(ValueNode input,
                                              NarrowOopStamp stamp)

addressToWord

public static WordCastNode addressToWord(ValueNode input,
                                         JavaKind wordKind)

objectToTrackedPointer

public static WordCastNode objectToTrackedPointer(ValueNode input,
                                                  JavaKind wordKind)

objectToUntrackedPointer

public static WordCastNode objectToUntrackedPointer(ValueNode input,
                                                    JavaKind wordKind)

narrowOopToUntrackedWord

public static WordCastNode narrowOopToUntrackedWord(ValueNode input,
                                                    JavaKind wordKind)

getInput

public ValueNode getInput()

inferStamp

public boolean inferStamp()

Description copied from class: ValueNode

This method can be overridden by subclasses of ValueNode if they need to recompute their stamp if their inputs change. A typical implementation will compute the stamp and pass it to ValueNode.updateStamp(Stamp), whose return value can be used as the result of this method.

Overrides:

inferStamp in class ValueNode

Returns:

true if the stamp has changed, false otherwise.

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

generate

public void generate(NodeLIRBuilderTool generator)

Specified by:

generate in interface LIRLowerable