org.graalvm.compiler.nodes.java

Class AbstractCompareAndSwapNode

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.java.AbstractCompareAndSwapNode

All Implemented Interfaces:

Cloneable, Formattable, IterableNodeType, MemoryKillMarker, DeoptimizingNode, DeoptimizingNode.DeoptBefore, GuardedNode, FixedNodeInterface, FixedWithNextNodeInterface, AddressableMemoryAccess, GuardedMemoryAccess, LIRLowerableAccess, MemoryAccess, MemoryKill, OnHeapMemoryAccess, OrderedMemoryAccess, SingleMemoryKill, LIRLowerable, NodeWithState, StateSplit, ValueNodeInterface

Direct Known Subclasses:

LogicCompareAndSwapNode, ValueCompareAndSwapNode

public abstract class AbstractCompareAndSwapNode
extends FixedAccessNode
implements OrderedMemoryAccess, StateSplit, LIRLowerableAccess, SingleMemoryKill

Low-level atomic compare-and-swap operation.

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.memory.MemoryKill

MemoryKill.NoLocation

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
protected MemoryOrderMode	memoryOrder
static NodeClass<AbstractCompareAndSwapNode>	TYPE

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

barrierType, guard, location, usedAsNullCheck

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

EMPTY_ARRAY, stamp

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

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

Fields inherited from interface org.graalvm.compiler.nodes.memory.MemoryKill

MULTI_KILL_NO_LOCATION, NO_LOCATION

Constructor Summary

Constructors

Constructor and Description
AbstractCompareAndSwapNode(NodeClass<? extends AbstractCompareAndSwapNode> c, AddressNode address, org.graalvm.word.LocationIdentity location, ValueNode expectedValue, ValueNode newValue, OnHeapMemoryAccess.BarrierType barrierType, Stamp stamp, MemoryOrderMode memoryOrder)

Method Summary

Modifier and Type	Method and Description
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.
Stamp	getAccessStamp(NodeView view)
ValueNode	getExpectedValue()
org.graalvm.word.LocationIdentity	getKilledLocationIdentity() This method is used to determine which memory location is killed by this node.
MemoryOrderMode	getMemoryOrder() Retrieves the node's required memory ordering.
ValueNode	getNewValue()
boolean	hasSideEffect() Determines if this node has a side-effect.
void	setStateAfter(FrameState x) Sets the FrameState corresponding to the state of the JVM after execution of this node.
FrameState	stateAfter() Gets the FrameState corresponding to the state of the JVM after execution of this node.

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

canDeoptimize, getAddress, getBarrierType, getGuard, getLastLocationAccess, getLocationIdentity, getUsedAsNullCheck, setAddress, setGuard, setLastLocationAccess, setUsedAsNullCheck

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

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, hasExactlyOneUsageOfType, 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.memory.OrderedMemoryAccess

ordersMemoryAccesses

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

states

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

asFixedNode

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

generate

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.ValueNodeInterface

asNode

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

asMultiMemoryKill, asSingleMemoryKill, isMemoryKill, isMultiMemoryKill, isSingleMemoryKill

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

canUseAsStateDuring

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

validateDeoptFrameStates

Field Detail

TYPE

public static final NodeClass<AbstractCompareAndSwapNode> TYPE

memoryOrder

protected final MemoryOrderMode memoryOrder

Constructor Detail

AbstractCompareAndSwapNode

public AbstractCompareAndSwapNode(NodeClass<? extends AbstractCompareAndSwapNode> c,
                                  AddressNode address,
                                  org.graalvm.word.LocationIdentity location,
                                  ValueNode expectedValue,
                                  ValueNode newValue,
                                  OnHeapMemoryAccess.BarrierType barrierType,
                                  Stamp stamp,
                                  MemoryOrderMode memoryOrder)

Method Detail

stateAfter

public FrameState stateAfter()

Description copied from interface: StateSplit

Gets the FrameState corresponding to the state of the JVM after execution of this node.

Specified by:

stateAfter in interface StateSplit

setStateAfter

public void setStateAfter(FrameState x)

Description copied from interface: StateSplit

Sets the FrameState corresponding to the state of the JVM after execution of this node.

Specified by:

setStateAfter in interface StateSplit

hasSideEffect

public boolean hasSideEffect()

Description copied from interface: StateSplit

Determines if this node has a side-effect. Such nodes cannot be safely re-executed because they modify state which is visible to other threads or modify state beyond what is captured in FrameState nodes.

Specified by:

hasSideEffect in interface StateSplit

getExpectedValue

public ValueNode getExpectedValue()

getNewValue

public ValueNode getNewValue()

getMemoryOrder

public final MemoryOrderMode getMemoryOrder()

Description copied from interface: OrderedMemoryAccess

Retrieves the node's required memory ordering.

Specified by:

getMemoryOrder in interface OrderedMemoryAccess

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

getAccessStamp

public Stamp getAccessStamp(NodeView view)

Specified by:

getAccessStamp in interface LIRLowerableAccess

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.