org.graalvm.compiler.nodes.memory.address

Class OffsetAddressNode

java.lang.Object

org.graalvm.compiler.graph.Node

org.graalvm.compiler.nodes.ValueNode

org.graalvm.compiler.nodes.calc.FloatingNode

org.graalvm.compiler.nodes.memory.address.AddressNode

org.graalvm.compiler.nodes.memory.address.OffsetAddressNode

All Implemented Interfaces:

Cloneable, Formattable, Node.IndirectCanonicalization, Node.ValueNumberable, CanonicalizableMarker, Canonicalizable, ValueNodeInterface

public class OffsetAddressNode
extends AddressNode
implements Canonicalizable

Represents an address that is composed of a base and an offset. The base can be either a JavaKind.Object, a word-sized integer or another pointer. The offset must be a word-sized integer.

Nested Class Summary

Nested classes/interfaces inherited from class org.graalvm.compiler.nodes.memory.address.AddressNode

AddressNode.Address

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.spi.Canonicalizable

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

Field Summary

Fields

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

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

Constructor Summary

Constructors

Constructor and Description
OffsetAddressNode(ValueNode base, ValueNode offset)

Method Summary

Modifier and Type	Method and Description
static AddressNode.Address	address(Object base, long offset)
Node	canonical(CanonicalizerTool tool) Implementations of this method can provide local optimizations like constant folding and strength reduction.
static OffsetAddressNode	create(ValueNode base)
ValueNode	getBase()
ValueNode	getIndex()
long	getMaxConstantDisplacement() Constant that is the maximum displacement from the base and index for this address.
ValueNode	getOffset()
void	setBase(ValueNode base)
void	setOffset(ValueNode offset)

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, 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, verify, verifyEdges, verifyInputs, verifySourcePosition, withNodeSourcePosition

Methods inherited from class java.lang.Object

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

Field Detail

TYPE

public static final NodeClass<OffsetAddressNode> TYPE

Constructor Detail

OffsetAddressNode

public OffsetAddressNode(ValueNode base,
                         ValueNode offset)

Method Detail

create

public static OffsetAddressNode create(ValueNode base)

getBase

public ValueNode getBase()

Specified by:

getBase in class AddressNode

setBase

public void setBase(ValueNode base)

getOffset

public ValueNode getOffset()

setOffset

public void setOffset(ValueNode offset)

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

Parameters:

tool - provides access to runtime interfaces like MetaAccessProvider

address

public static AddressNode.Address address(Object base,
                                          long offset)

getMaxConstantDisplacement

public long getMaxConstantDisplacement()

Description copied from class: AddressNode

Constant that is the maximum displacement from the base and index for this address. This value is used to determine whether using the access as an implicit null check on the base is valid.

Specified by:

getMaxConstantDisplacement in class AddressNode

Returns:

the maximum distance in bytes from the base that this address can be

getIndex

public ValueNode getIndex()

Specified by:

getIndex in class AddressNode