com.oracle.svm.hosted.nodes

Class DeoptProxyNode

java.lang.Object

org.graalvm.compiler.graph.Node

org.graalvm.compiler.nodes.ValueNode

org.graalvm.compiler.nodes.calc.FloatingNode

com.oracle.svm.hosted.nodes.DeoptProxyNode

All Implemented Interfaces:

Cloneable, Formattable, org.graalvm.compiler.graph.IterableNodeType, org.graalvm.compiler.graph.Node.ValueNumberable, org.graalvm.compiler.graph.NodeInterface, org.graalvm.compiler.graph.spi.Canonicalizable, org.graalvm.compiler.nodes.spi.LimitedValueProxy, org.graalvm.compiler.nodes.spi.LIRLowerable, org.graalvm.compiler.nodes.spi.Proxy, org.graalvm.compiler.nodes.ValueNodeInterface

public final class DeoptProxyNode
extends org.graalvm.compiler.nodes.calc.FloatingNode
implements org.graalvm.compiler.nodes.spi.LimitedValueProxy, org.graalvm.compiler.graph.Node.ValueNumberable, org.graalvm.compiler.nodes.spi.LIRLowerable, org.graalvm.compiler.graph.spi.Canonicalizable, org.graalvm.compiler.graph.IterableNodeType

Wraps locals and bytecode stack elements at deoptimization points. DeoptProxyNodes are inserted in deoptimization target methods to avoid global value numbering and rescheduling of local variable (and stack) accesses across deoptimization points.

This is needed to ensure that the values, which are set by the Deoptimizer at the deoptimization point, are really read from their locations (and not hold in a temporary register, etc.)

Nested Class Summary

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

org.graalvm.compiler.graph.Node.ConstantNodeParameter, org.graalvm.compiler.graph.Node.EdgeVisitor, org.graalvm.compiler.graph.Node.IndirectCanonicalization, org.graalvm.compiler.graph.Node.InjectedNodeParameter, org.graalvm.compiler.graph.Node.Input, org.graalvm.compiler.graph.Node.NodeInsertionStackTrace, org.graalvm.compiler.graph.Node.NodeIntrinsic, org.graalvm.compiler.graph.Node.OptionalInput, org.graalvm.compiler.graph.Node.Successor, org.graalvm.compiler.graph.Node.ValueNumberable

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

org.graalvm.compiler.graph.spi.Canonicalizable.Binary<T extends org.graalvm.compiler.graph.Node>, org.graalvm.compiler.graph.spi.Canonicalizable.BinaryCommutative<T extends org.graalvm.compiler.graph.Node>, org.graalvm.compiler.graph.spi.Canonicalizable.Unary<T extends org.graalvm.compiler.graph.Node>

Field Summary

Fields

Modifier and Type	Field and Description
protected int	deoptIndex A unique index for the deoptimization point.
protected org.graalvm.compiler.nodes.ValueNode	proxyPoint The link to the deoptimization point to prevent rescheduling of this node.
static org.graalvm.compiler.graph.NodeClass<DeoptProxyNode>	TYPE
protected org.graalvm.compiler.nodes.ValueNode	value The original value, e.g.

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

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	DeoptProxyNode(org.graalvm.compiler.nodes.ValueNode value, org.graalvm.compiler.nodes.ValueNode proxyPoint, int deoptIndex)

Method Summary

Modifier and Type	Method and Description
org.graalvm.compiler.graph.Node	canonical(org.graalvm.compiler.graph.spi.CanonicalizerTool tool)
static org.graalvm.compiler.nodes.ValueNode	create(org.graalvm.compiler.nodes.ValueNode value, org.graalvm.compiler.nodes.ValueNode proxyPoint, int deoptIndex)
void	generate(org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool gen)
org.graalvm.compiler.nodes.ValueNode	getOriginalNode()
boolean	hasProxyPoint()
boolean	inferStamp()

Methods inherited from class org.graalvm.compiler.nodes.calc.FloatingNode

asNode

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

asConstant, asJavaConstant, getStackKind, graph, hasUsagesOtherThan, isAllowedUsageType, isConstant, isConstantPredicate, isDefaultConstant, isJavaConstant, isNullConstant, replaceAtUsages, setStamp, stamp, updateStamp

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

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.graalvm.compiler.graph.NodeInterface

asNode

Field Detail

TYPE

public static final org.graalvm.compiler.graph.NodeClass<DeoptProxyNode> TYPE

proxyPoint

protected org.graalvm.compiler.nodes.ValueNode proxyPoint

The link to the deoptimization point to prevent rescheduling of this node.

value

protected org.graalvm.compiler.nodes.ValueNode value

The original value, e.g. a ParameterNode

deoptIndex

protected final int deoptIndex

A unique index for the deoptimization point. It prevents global value numbering across deoptimization points, but enabled global value numbering between two deoptimization points.

Constructor Detail

DeoptProxyNode

protected DeoptProxyNode(org.graalvm.compiler.nodes.ValueNode value,
                         org.graalvm.compiler.nodes.ValueNode proxyPoint,
                         int deoptIndex)

Method Detail

create

public static org.graalvm.compiler.nodes.ValueNode create(org.graalvm.compiler.nodes.ValueNode value,
                                                          org.graalvm.compiler.nodes.ValueNode proxyPoint,
                                                          int deoptIndex)

inferStamp

public boolean inferStamp()

Overrides:

inferStamp in class org.graalvm.compiler.nodes.ValueNode

getOriginalNode

public org.graalvm.compiler.nodes.ValueNode getOriginalNode()

Specified by:

getOriginalNode in interface org.graalvm.compiler.nodes.spi.LimitedValueProxy

Specified by:

getOriginalNode in interface org.graalvm.compiler.nodes.spi.Proxy

generate

public void generate(org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool gen)

Specified by:

generate in interface org.graalvm.compiler.nodes.spi.LIRLowerable

canonical

public org.graalvm.compiler.graph.Node canonical(org.graalvm.compiler.graph.spi.CanonicalizerTool tool)

Specified by:

canonical in interface org.graalvm.compiler.graph.spi.Canonicalizable

hasProxyPoint

public boolean hasProxyPoint()