Class AccessArgumentsArrayDirectlyNode

java.lang.Object

com.oracle.truffle.api.nodes.Node

com.oracle.truffle.js.nodes.JavaScriptBaseNode

com.oracle.truffle.js.nodes.JavaScriptNode

com.oracle.truffle.js.nodes.arguments.AccessArgumentsArrayDirectlyNode

All Implemented Interfaces:

com.oracle.truffle.api.instrumentation.InstrumentableNode, com.oracle.truffle.api.nodes.NodeInterface, Cloneable

public final class AccessArgumentsArrayDirectlyNode
extends JavaScriptNode

This node accesses the arguments array optimistically directly as Object[], but can fall back to returning a JS Arguments Object. This node is used to avoid unnecessary allocation of the Arguments Object for the function.apply(this, arguments) call pattern where it would be immediately discarded.

See Also:

• CallApplyArgumentsNode

Nested Class Summary

Nested classes/interfaces inherited from class com.oracle.truffle.api.nodes.Node

com.oracle.truffle.api.nodes.Node.Child, com.oracle.truffle.api.nodes.Node.Children

Nested classes/interfaces inherited from interface com.oracle.truffle.api.instrumentation.InstrumentableNode

com.oracle.truffle.api.instrumentation.InstrumentableNode.WrapperNode

Field Summary

Fields inherited from class com.oracle.truffle.js.nodes.JavaScriptNode

INTERMEDIATE_VALUE

Constructor Summary

Constructors

Constructor	Description
AccessArgumentsArrayDirectlyNode(JavaScriptNode writeArgumentsNode, JavaScriptNode readArgumentsNode, int leadingArgCount)

Method Summary

Modifier and Type	Method	Description
protected JavaScriptNode	copyUninitialized(Set<Class<? extends com.oracle.truffle.api.instrumentation.Tag>> materializedTags)
Object	execute(com.oracle.truffle.api.frame.VirtualFrame frame)	Executes this node using the specified context and frame and returns the result value.
void	replaceWithDefaultArguments()	Called when the arguments array can no longer be accessed directly.

Methods inherited from class com.oracle.truffle.js.nodes.JavaScriptNode

addCallTag, addExpressionTag, addRootBodyTag, addStatementTag, cloneUninitialized, cloneUninitialized, copy, createWrapper, executeBoolean, executeDouble, executeInt, executeVoid, expressionToString, findBlockScopeNode, getSourceSection, hasSourceSection, hasTag, isInstrumentable, isResultAlwaysOfType, onReplace, setSourceSection, setSourceSection, toString, transferSourceSection, transferSourceSectionAddExpressionTag, transferSourceSectionAndTags

Methods inherited from class com.oracle.truffle.js.nodes.JavaScriptBaseNode

getJSContext, getLanguage, getLanguageOptions, getRealm, hasOverloadedOperators, reportLoopCount, reportLoopCount

Methods inherited from class com.oracle.truffle.api.nodes.Node

accept, adoptChildren, atomic, atomic, deepCopy, getChildren, getCost, getDebugProperties, getDescription, getEncapsulatingSourceSection, getLock, getParent, getRootNode, insert, insert, isAdoptable, isSafelyReplaceableBy, notifyInserted, replace, replace, reportPolymorphicSpecialize, reportReplace

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.oracle.truffle.api.instrumentation.InstrumentableNode

createProbe, findNearestNodeAt, findNearestNodeAt, findProbe, getNodeObject, materializeInstrumentableNodes

Constructor Details

AccessArgumentsArrayDirectlyNode

public AccessArgumentsArrayDirectlyNode(JavaScriptNode writeArgumentsNode,
 JavaScriptNode readArgumentsNode,
 int leadingArgCount)

Method Details

execute

public Object execute(com.oracle.truffle.api.frame.VirtualFrame frame)

Description copied from class: JavaScriptNode

Executes this node using the specified context and frame and returns the result value.

Specified by:

execute in class JavaScriptNode

Parameters:

frame - the frame of the currently executing guest language method

Returns:

the value of the execution

replaceWithDefaultArguments

public void replaceWithDefaultArguments()

Called when the arguments array can no longer be accessed directly.

copyUninitialized

protected JavaScriptNode copyUninitialized(Set<Class<? extends com.oracle.truffle.api.instrumentation.Tag>> materializedTags)

Overrides:

copyUninitialized in class JavaScriptNode