com.oracle.graal.nodes.calc

Class IsNullNode

java.lang.Object

com.oracle.graal.graph.Node

com.oracle.graal.nodes.ValueNode

com.oracle.graal.nodes.calc.FloatingNode

com.oracle.graal.nodes.LogicNode

com.oracle.graal.nodes.UnaryOpLogicNode

com.oracle.graal.nodes.calc.IsNullNode

All Implemented Interfaces:

Node.ValueNumberable, Canonicalizable, Canonicalizable.Unary<ValueNode>, LIRLowerable, PiPushable, Virtualizable, Cloneable, Formattable, KindProvider

public final class IsNullNode
extends UnaryOpLogicNode
implements LIRLowerable, Virtualizable, PiPushable

An IsNullNode will be true if the supplied value is null, and false if it is non-null.

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.graal.graph.Node

Node.ConstantNodeParameter, Node.InjectedNodeParameter, Node.Input, Node.NodeIntrinsic, Node.OptionalInput, Node.Successor, Node.ValueNumberable

Nested classes/interfaces inherited from interface com.oracle.graal.graph.spi.Canonicalizable

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

Field Summary

Fields

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

Fields inherited from class com.oracle.graal.nodes.UnaryOpLogicNode

value

Fields inherited from class com.oracle.graal.nodes.ValueNode

stamp

Fields inherited from class com.oracle.graal.graph.Node

NODE_LIST, NOT_ITERABLE, USE_UNSAFE_TO_CLONE, WithAllEdges, WithNoEdges, WithOnlyInputEdges, WithOnlySucessorEdges

Constructor Summary

Constructors

Constructor and Description
IsNullNode(ValueNode object)

Method Summary

Modifier and Type	Method and Description
ValueNode	canonical(CanonicalizerTool tool, ValueNode forValue) Similar to Canonicalizable.canonical(CanonicalizerTool), except that implementations should act as if the current input of the node was the given one, i.e., they should never look at the inputs via the this pointer.
void	generate(NodeLIRBuilderTool gen)
Stamp	getSucceedingStampForValue(boolean negated)
static IsNullNode	isNull(Object object)
boolean	push(PiNode parent)
TriState	tryFold(Stamp valueStamp)
boolean	verify()
void	virtualize(VirtualizerTool tool) A node class can implement this method to convey information about what its effect would be if some of its inputs were virtualized.

Methods inherited from class com.oracle.graal.nodes.UnaryOpLogicNode

getValue

Methods inherited from class com.oracle.graal.nodes.LogicNode

and, and, isContradiction, isTautology, or, or

Methods inherited from class com.oracle.graal.nodes.calc.FloatingNode

asNode

Methods inherited from class com.oracle.graal.nodes.ValueNode

asConstant, asJavaConstant, getKind, graph, inferStamp, isAllowedUsageType, isConstant, isConstantPredicate, isNullConstant, setStamp, stamp, updateStamp

Methods inherited from class com.oracle.graal.graph.Node

acceptInputs, acceptSuccessors, afterClone, assertFalse, assertTrue, cfgPredecessors, cfgSuccessors, clearInputs, clearSuccessors, copyWithInputs, copyWithInputs, equals, fail, formatTo, getDebugProperties, getDebugProperties, getId, getNodeClass, getUsageAt, getUsageCount, hashCode, hasNoUsages, hasUsages, inputs, isAlive, isDeleted, markDeleted, modCount, newIdentityMap, newIdentityMap, newIdentityMap, newMap, newMap, newMap, newSet, newSet, predecessor, pushInputs, removeUsage, replaceAndDelete, replaceAtMatchingUsages, replaceAtPredecessor, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceFirstInput, replaceFirstSuccessor, safeDelete, simplify, successors, toString, toString, updatePredecessor, updateUsages, updateUsagesInterface, usages, valueEquals, verifyEdges, verifyInputs

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.oracle.graal.graph.spi.Canonicalizable.Unary

canonical

Field Detail

TYPE

public static final NodeClass<IsNullNode> TYPE

Constructor Detail

IsNullNode

public IsNullNode(ValueNode object)

Method Detail

generate

public void generate(NodeLIRBuilderTool gen)

Specified by:

generate in interface LIRLowerable

Overrides:

generate in class UnaryOpLogicNode

verify

public boolean verify()

Overrides:

verify in class Node

canonical

public ValueNode canonical(CanonicalizerTool tool,
                           ValueNode forValue)

Description copied from interface: Canonicalizable.Unary

Similar to Canonicalizable.canonical(CanonicalizerTool), except that implementations should act as if the current input of the node was the given one, i.e., they should never look at the inputs via the this pointer.

Specified by:

canonical in interface Canonicalizable.Unary<ValueNode>

virtualize

public void virtualize(VirtualizerTool tool)

Description copied from interface: Virtualizable

A node class can implement this method to convey information about what its effect would be if some of its inputs were virtualized. All modifications must be made through the supplied tool, and not directly on the node, because by the time this method is called the virtualized/non-virtualized state is still speculative and might not hold because of loops, etc.

Specified by:

virtualize in interface Virtualizable

Parameters:

tool - the tool used to describe the effects of this node

push

public boolean push(PiNode parent)

Specified by:

push in interface PiPushable

Parameters:

parent - PiNode

Returns:

true if node was moved

isNull

public static IsNullNode isNull(Object object)

getSucceedingStampForValue

public Stamp getSucceedingStampForValue(boolean negated)

Specified by:

getSucceedingStampForValue in class UnaryOpLogicNode

tryFold

public TriState tryFold(Stamp valueStamp)

Specified by:

tryFold in class UnaryOpLogicNode