com.oracle.graal.nodes

Class PiArrayNode

java.lang.Object

com.oracle.graal.graph.Node

com.oracle.graal.nodes.ValueNode

com.oracle.graal.nodes.calc.FloatingNode

com.oracle.graal.nodes.FloatingGuardedNode

com.oracle.graal.nodes.PiNode

com.oracle.graal.nodes.PiArrayNode

All Implemented Interfaces:

IterableNodeType, Node.ValueNumberable, NodeInterface, Canonicalizable, GuardedNode, ArrayLengthProvider, LimitedValueProxy, LIRLowerable, Proxy, ValueProxy, Virtualizable, Cloneable, Formattable, KindProvider

public final class PiArrayNode
extends PiNode
implements ArrayLengthProvider

A PiNode that also provides an array length in addition to a more refined stamp. A usage that reads the array length, such as an ArrayLengthNode, can be canonicalized based on this information.

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
(package private) ValueNode	length
static NodeClass<PiArrayNode>	TYPE

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

object, piStamp

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

guard

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
PiArrayNode(ValueNode object, ValueNode length, Stamp stamp)

Method Summary

Modifier and Type	Method and Description
Node	canonical(CanonicalizerTool tool) Implementations of this method can provide local optimizations like constant folding and strength reduction.
ValueNode	length()
static Object	piArrayCast(Object object, int length, Stamp stamp)

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

asNonNullClass, generate, getOriginalNode, inferStamp, object, piCast, piCast, piCast, piCastNonNull, virtualize

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

getGuard, setGuard

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

asNode

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

asConstant, asJavaConstant, getKind, graph, 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, verify, 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.NodeInterface

asNode

Methods inherited from interface com.oracle.graal.nodes.extended.GuardedNode

asNode

Field Detail

TYPE

public static final NodeClass<PiArrayNode> TYPE

length

ValueNode length

Constructor Detail

PiArrayNode

public PiArrayNode(ValueNode object,
                   ValueNode length,
                   Stamp stamp)

Method Detail

length

public ValueNode length()

Specified by:

length in interface ArrayLengthProvider

Returns:

the length of the array described by this node, or null if it is not available

canonical

public Node canonical(CanonicalizerTool tool)

Description copied from interface: Canonicalizable

Implementations of this method can provide local optimizations like constant folding and strength reduction. Implementations should look at the properties and inputs of the current node and determine if there is a more optimal and always semantically correct replacement.
The return value determines the effect that the canonicalization will have:

• Returning an pre-existing node will replace the current node with the given one.
• Returning a newly created node (that was not yet added to the graph) will replace the current node with the given one, after adding it to the graph. If both the replacement and the replacee are anchored in control flow (fixed nodes), the replacement will be added to the control flow. It is invalid to replace a non-fixed node with a newly created fixed node (because its placement in the control flow cannot be determined without scheduling).
• Returning null will delete the current node and replace it with null at all usages. Note that it is not necessary to delete floating nodes that have no more usages this way - they will be deleted automatically.

Specified by:

canonical in interface Canonicalizable

Overrides:

canonical in class PiNode

Parameters:

tool - provides access to runtime interfaces like MetaAccessProvider

piArrayCast

public static Object piArrayCast(Object object,
                                 int length,
                                 Stamp stamp)