org.graalvm.compiler.nodes.memory

Class VolatileReadNode

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.DeoptimizingFixedWithNextNode

org.graalvm.compiler.nodes.ImplicitNullCheckNode

org.graalvm.compiler.nodes.memory.FixedAccessNode

org.graalvm.compiler.nodes.memory.FloatableAccessNode

org.graalvm.compiler.nodes.memory.ReadNode

org.graalvm.compiler.nodes.memory.VolatileReadNode

All Implemented Interfaces:

Cloneable, Formattable, IterableNodeType, NodeInterface, Canonicalizable, DeoptimizingNode, DeoptimizingNode.DeoptBefore, GuardedNode, GuardingNode, FixedNodeInterface, AddressableMemoryAccess, GuardedMemoryAccess, LIRLowerableAccess, MemoryAccess, MemoryKill, OnHeapMemoryAccess, SingleMemoryKill, LIRLowerable, Lowerable, NodeWithState, Virtualizable, ValueNodeInterface

public class VolatileReadNode
extends ReadNode
implements SingleMemoryKill, Lowerable

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.graph.spi.Canonicalizable

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

Nested classes/interfaces inherited from interface org.graalvm.compiler.nodes.memory.OnHeapMemoryAccess

OnHeapMemoryAccess.BarrierType

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

DeoptimizingNode.DeoptAfter, DeoptimizingNode.DeoptBefore, DeoptimizingNode.DeoptDuring

Field Summary

Fields

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

Fields inherited from class org.graalvm.compiler.nodes.memory.FloatableAccessNode

forceFixed

Fields inherited from class org.graalvm.compiler.nodes.memory.FixedAccessNode

barrierType, guard, location, nullCheck

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

deoptReasonAndAction, deoptSpeculation

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

stateBefore

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

next

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

Constructor and Description
VolatileReadNode(AddressNode address, Stamp stamp, OnHeapMemoryAccess.BarrierType barrierType)

Method Summary

Modifier and Type	Method and Description
FloatingAccessNode	asFloatingNode()
boolean	canFloat() AccessNodes can float only if their location identities are not ANY_LOCATION.
boolean	canNullCheck() Determines if the memory touch operation represented by this node can use OS level semantics for representing the null check of the memory location with an operating system level trap.
void	generate(NodeLIRBuilderTool gen)
org.graalvm.word.LocationIdentity	getKilledLocationIdentity() This method is used to determine which memory location is killed by this node.

Methods inherited from class org.graalvm.compiler.nodes.memory.ReadNode

canonical, canonicalizeRead, getAccessStamp, isAllowedUsageType, virtualize

Methods inherited from class org.graalvm.compiler.nodes.memory.FloatableAccessNode

setForceFixed

Methods inherited from class org.graalvm.compiler.nodes.memory.FixedAccessNode

canDeoptimize, getAddress, getBarrierType, getGuard, getLastLocationAccess, getLocationIdentity, getNullCheck, setAddress, setGuard, setLastLocationAccess, setNullCheck

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

getDeoptReasonAndAction, getDeoptSpeculation, setImplicitDeoptimization

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

setStateBefore, stateBefore

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

asNode, next, setNext

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

verify

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

asConstant, asJavaConstant, asSerializableConstant, getStackKind, graph, hasUsagesOtherThan, inferStamp, isConstant, isConstantPredicate, isDefaultConstant, isIllegalConstant, isJavaConstant, isNullConstant, isSerializableConstant, replaceAtAllUsages, 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, getUsageCount, hasExactlyOneUsage, hashCode, hasMoreThanOneUsage, hasNoUsages, hasOnlyUsagesOfType, hasUsages, inputPositions, inputs, isAlive, isDeleted, isUnregistered, markDeleted, maybeNotifyZeroUsages, modCount, predecessor, pushInputs, removeUsage, replaceAllInputs, replaceAndDelete, replaceAtMatchingUsages, replaceAtPredecessor, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsagesAndDelete, replaceAtUsagesAndDelete, replaceFirstInput, replaceFirstInput, replaceFirstSuccessor, safeDelete, setCreationPosition, setInsertionPosition, setNodeSourcePosition, simplify, successorPositions, successors, toString, toString, updateNodeSourcePosition, updatePredecessor, updateUsages, updateUsagesInterface, usages, valueEquals, 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.nodes.ValueNodeInterface

asNode

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

lower

Methods inherited from interface org.graalvm.compiler.nodes.memory.AddressableMemoryAccess

getAddress, setAddress

Methods inherited from interface org.graalvm.compiler.nodes.memory.MemoryAccess

getLastLocationAccess, getLocationIdentity, setLastLocationAccess

Methods inherited from interface org.graalvm.compiler.nodes.DeoptimizingNode.DeoptBefore

canUseAsStateDuring

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

states

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

asNode

Field Detail

TYPE

public static final NodeClass<VolatileReadNode> TYPE

Constructor Detail

VolatileReadNode

public VolatileReadNode(AddressNode address,
                        Stamp stamp,
                        OnHeapMemoryAccess.BarrierType barrierType)

Method Detail

generate

public void generate(NodeLIRBuilderTool gen)

Specified by:

generate in interface LIRLowerable

Overrides:

generate in class ReadNode

asFloatingNode

public FloatingAccessNode asFloatingNode()

Overrides:

asFloatingNode in class ReadNode

canFloat

public boolean canFloat()

Description copied from class: FloatableAccessNode

AccessNodes can float only if their location identities are not ANY_LOCATION. Furthermore, in case G1 is enabled any access (read) to the java.lang.ref.Reference.referent field which has an attached write barrier with pre-semantics can not also float.

Overrides:

canFloat in class FloatableAccessNode

getKilledLocationIdentity

public org.graalvm.word.LocationIdentity getKilledLocationIdentity()

Description copied from interface: SingleMemoryKill

This method is used to determine which memory location is killed by this node. Returning the special value LocationIdentity.any() will kill all memory locations.

Specified by:

getKilledLocationIdentity in interface SingleMemoryKill

Returns:

the identity of the location killed by this node.

canNullCheck

public boolean canNullCheck()

Description copied from interface: AddressableMemoryAccess

Determines if the memory touch operation represented by this node can use OS level semantics for representing the null check of the memory location with an operating system level trap.

Specified by:

canNullCheck in interface AddressableMemoryAccess

Overrides:

canNullCheck in class ReadNode