org.graalvm.compiler.nodes.gc

Class G1ReferentFieldReadBarrier

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.nodes.gc.WriteBarrier

org.graalvm.compiler.nodes.gc.ObjectWriteBarrier

org.graalvm.compiler.nodes.gc.G1ReferentFieldReadBarrier

All Implemented Interfaces:

Cloneable, Formattable, FixedNodeInterface, FixedWithNextNodeInterface, Lowerable, ValueNodeInterface

public final class G1ReferentFieldReadBarrier
extends ObjectWriteBarrier

The G1ReferentFieldReadBarrier is added when a read access is performed to the referent field of a Reference object (through a LoadFieldNode or an UnsafeLoadNode). The return value of the read is passed to the snippet implementing the read barrier and consequently is added to the SATB queue if the concurrent marker is enabled.

Nested Class Summary

Nested classes/interfaces inherited from class org.graalvm.compiler.nodes.gc.WriteBarrier

WriteBarrier.Kind

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

Field Summary

Fields

Modifier and Type	Field and Description
static NodeClass<G1ReferentFieldReadBarrier>	TYPE

Fields inherited from class org.graalvm.compiler.nodes.gc.ObjectWriteBarrier

precise, value

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

Constructor and Description
G1ReferentFieldReadBarrier(AddressNode address, ValueNode expectedObject)

Method Summary

Modifier and Type	Method and Description
ValueNode	getExpectedObject()
WriteBarrier.Kind	getKind()

Methods inherited from class org.graalvm.compiler.nodes.gc.ObjectWriteBarrier

getValue, usePrecise

Methods inherited from class org.graalvm.compiler.nodes.gc.WriteBarrier

getAddress, lower

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, 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, 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.ValueNodeInterface

asNode

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

asFixedNode

Field Detail

TYPE

public static final NodeClass<G1ReferentFieldReadBarrier> TYPE

Constructor Detail

G1ReferentFieldReadBarrier

public G1ReferentFieldReadBarrier(AddressNode address,
                                  ValueNode expectedObject)

Method Detail

getExpectedObject

public ValueNode getExpectedObject()

getKind

public WriteBarrier.Kind getKind()

Specified by:

getKind in class WriteBarrier