Class SignExtendNode

java.lang.Object

jdk.graal.compiler.graph.Node

jdk.graal.compiler.nodes.ValueNode

jdk.graal.compiler.nodes.calc.FloatingNode

jdk.graal.compiler.nodes.calc.UnaryNode

jdk.graal.compiler.nodes.calc.IntegerConvertNode<ArithmeticOpTable.IntegerConvertOp.SignExtend>

jdk.graal.compiler.nodes.calc.SignExtendNode

All Implemented Interfaces:

Cloneable, Formattable, Node.IndirectInputChangedCanonicalization, Node.ValueNumberable, CanonicalizableMarker, ArithmeticOperation, ConvertNode, ArithmeticLIRLowerable, Canonicalizable, Canonicalizable.Unary<ValueNode>, LIRLowerable, StampInverter, ValueNodeInterface

public final class SignExtendNode
extends IntegerConvertNode<ArithmeticOpTable.IntegerConvertOp.SignExtend>

The SignExtendNode converts an integer to a wider integer using sign extension. On all supported architectures, sub-word (<32 bit) operations generally do not yield performance improvements. They can even be slower than 32 bit operations. Thus, nodes extending <32 bit values to 32 bit or more should usually not be removed.

Nested Class Summary

Nested classes/interfaces inherited from class jdk.graal.compiler.graph.Node

Node.ConstantNodeParameter, Node.EdgeVisitor, Node.IndirectInputChangedCanonicalization, Node.InjectedNodeParameter, Node.Input, Node.InputsChangedCanonicalization, Node.NodeInsertionStackTrace, Node.NodeIntrinsic, Node.NodeIntrinsicFactory, Node.OptionalInput, Node.Successor, Node.ValueNumberable

Nested classes/interfaces inherited from interface jdk.graal.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	Description
static final NodeClass<SignExtendNode>	TYPE

Fields inherited from class jdk.graal.compiler.nodes.calc.IntegerConvertNode

inputBits, resultBits

Fields inherited from class jdk.graal.compiler.nodes.calc.UnaryNode

value

Fields inherited from class jdk.graal.compiler.nodes.ValueNode

EMPTY_ARRAY, stamp

Fields inherited from class jdk.graal.compiler.graph.Node

NOT_ITERABLE, TRACK_CREATION_POSITION, WithAllEdges, WithOnlyInputEdges

Constructor Summary

Constructors

Constructor	Description
SignExtendNode(ValueNode input, int resultBits)
SignExtendNode(ValueNode input, int inputBits, int resultBits)

Method Summary

Modifier and Type	Method	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.
static ValueNode	create(ValueNode input, int inputBits, int resultBits, NodeView view)
static ValueNode	create(ValueNode input, int resultBits, NodeView view)
void	generate(NodeLIRBuilderTool nodeValueMap, ArithmeticLIRGeneratorTool gen)
protected ArithmeticOpTable.IntegerConvertOp<ArithmeticOpTable.IntegerConvertOp.SignExtend>	getOp(ArithmeticOpTable table)
protected ArithmeticOpTable.IntegerConvertOp<ArithmeticOpTable.IntegerConvertOp.Narrow>	getReverseOp(ArithmeticOpTable table)
boolean	isLossless()	Check whether a conversion is lossless.
boolean	mayNullCheckSkipConversion()	Checks whether a null check may skip the conversion.

Methods inherited from class jdk.graal.compiler.nodes.calc.IntegerConvertNode

convert, convert, convert, convert, convert, convert, convertUnsigned, convertUnsigned, findSynonym, foldStamp, getArithmeticOp, getInputBits, getResultBits, invertStamp, reverse

Methods inherited from class jdk.graal.compiler.nodes.calc.UnaryNode

getValue, inferStamp, setValue

Methods inherited from class jdk.graal.compiler.nodes.ValueNode

asConstant, asJavaConstant, asNode, checkReplaceAtUsagesInvariants, getStackKind, graph, hasUsagesOtherThan, isAllowedUsageType, isConstant, isConstantPredicate, isDefaultConstant, isIllegalConstant, isJavaConstant, isNullConstant, recursivelyDataFlowEqualsUpTo, setStamp, stamp, updateStamp, updateUsagesInterface

Methods inherited from class jdk.graal.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, getId, getIdBeforeDeletion, getInsertionPosition, getNodeClass, getNodeSourcePosition, getOptions, getUsageCount, hasExactlyOneUsage, hasExactlyOneUsageOfType, hashCode, hasMoreThanOneUsage, hasNoUsages, hasUsages, inputPositions, inputs, isAlive, isDeleted, isUnregistered, markDeleted, maybeNotifyZeroUsages, modCount, predecessor, pushInputs, removeDeadUsages, removeUsage, removeUsages, replaceAllInputs, replaceAndDelete, replaceAtAllUsages, replaceAtMatchingUsages, replaceAtPredecessor, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsages, replaceAtUsagesAndDelete, replaceFirstInput, replaceFirstSuccessor, safeDelete, setCreationPosition, setInsertionPosition, setNodeSourcePosition, singleUsage, successorPositions, successors, toString, toString, updateNodeSourcePosition, updatePredecessor, updateUsages, usages, valueEquals, verify, verify, verifyEdges, verifyInputs, verifyNode, withNodeSourcePosition

Methods inherited from class java.lang.Object

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

Methods inherited from interface jdk.graal.compiler.nodes.spi.ArithmeticLIRLowerable

generate

Methods inherited from interface jdk.graal.compiler.nodes.spi.Canonicalizable.Unary

canonical

Methods inherited from interface jdk.graal.compiler.nodes.calc.ConvertNode

getValue, preservesOrder, preservesOrder

Methods inherited from interface jdk.graal.compiler.nodes.spi.StampInverter

getValue

Methods inherited from interface jdk.graal.compiler.nodes.ValueNodeInterface

asNode

Field Details

TYPE

public static final NodeClass<SignExtendNode> TYPE

Constructor Details

SignExtendNode

public SignExtendNode(ValueNode input,
 int resultBits)

SignExtendNode

public SignExtendNode(ValueNode input,
 int inputBits,
 int resultBits)

Method Details

create

public static ValueNode create(ValueNode input,
 int resultBits,
 NodeView view)

create

public static ValueNode create(ValueNode input,
 int inputBits,
 int resultBits,
 NodeView view)

getOp

protected ArithmeticOpTable.IntegerConvertOp<ArithmeticOpTable.IntegerConvertOp.SignExtend> getOp(ArithmeticOpTable table)

Specified by:

getOp in class IntegerConvertNode<ArithmeticOpTable.IntegerConvertOp.SignExtend>

getReverseOp

protected ArithmeticOpTable.IntegerConvertOp<ArithmeticOpTable.IntegerConvertOp.Narrow> getReverseOp(ArithmeticOpTable table)

Specified by:

getReverseOp in class IntegerConvertNode<ArithmeticOpTable.IntegerConvertOp.SignExtend>

isLossless

public boolean isLossless()

Description copied from interface: ConvertNode

Check whether a conversion is lossless.

Returns:

true iff reverse(convert(c)) == c for all c

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>

Overrides:

canonical in class IntegerConvertNode<ArithmeticOpTable.IntegerConvertOp.SignExtend>

generate

public void generate(NodeLIRBuilderTool nodeValueMap,
 ArithmeticLIRGeneratorTool gen)

mayNullCheckSkipConversion

public boolean mayNullCheckSkipConversion()

Description copied from interface: ConvertNode

Checks whether a null check may skip the conversion. This is true only if the conversion does not impact the result of the isNullNode, i.e., isNull(input) === isNull(convert(input)).

Returns:

whether a null check may skip the conversion