Package com.oracle.truffle.sl.nodes.local

Class SLReadLocalVariableNode

java.lang.Object

com.oracle.truffle.api.nodes.Node

com.oracle.truffle.sl.nodes.local.SLScopedNode

com.oracle.truffle.sl.nodes.SLStatementNode

com.oracle.truffle.sl.nodes.SLExpressionNode

com.oracle.truffle.sl.nodes.local.SLReadLocalVariableNode

All Implemented Interfaces:

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

public abstract class SLReadLocalVariableNode
extends SLExpressionNode

Node to read a local variable from a function's frame. The Truffle frame API allows to store primitive values of all Java primitive types, and Object values. This means that all SL types that are objects are handled by the readObject(com.oracle.truffle.api.frame.VirtualFrame) method.

We use the primitive type only when the same primitive type is uses for all writes. If the local variable is type-polymorphic, then the value is always stored as an Object, i.e., primitive values are boxed. Even a mixture of long and boolean writes leads to both being stored boxed.

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

Constructor Summary

Constructors

Constructor	Description
SLReadLocalVariableNode()

Method Summary

Modifier and Type	Method	Description
Object	getNodeObject()
protected abstract int	getSlot()	Returns the descriptor of the accessed local variable.
boolean	hasTag(Class<? extends com.oracle.truffle.api.instrumentation.Tag> tag)
protected boolean	readBoolean(com.oracle.truffle.api.frame.VirtualFrame frame)
protected long	readLong(com.oracle.truffle.api.frame.VirtualFrame frame)
protected Object	readObject(com.oracle.truffle.api.frame.VirtualFrame frame)

Methods inherited from class com.oracle.truffle.sl.nodes.SLExpressionNode

addExpressionTag, createWrapper, executeBoolean, executeGeneric, executeLong, executeVoid

Methods inherited from class com.oracle.truffle.sl.nodes.SLStatementNode

addRootTag, addStatementTag, formatSourceSection, getSourceCharIndex, getSourceEndIndex, getSourceLength, getSourceSection, hasSource, isInstrumentable, setSourceSection, setUnavailableSourceSection, toString

Methods inherited from class com.oracle.truffle.sl.nodes.local.SLScopedNode

findBlock, getVisibleVariablesIndexOnEnter, hasScope, setVisibleVariablesIndexOnEnter, setVisibleVariablesIndexOnExit

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

accept, adoptChildren, atomic, atomic, copy, deepCopy, getChildren, getCost, getDebugProperties, getDescription, getEncapsulatingSourceSection, getLock, getParent, getRootNode, insert, insert, isAdoptable, isSafelyReplaceableBy, notifyInserted, onReplace, 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, materializeInstrumentableNodes

Constructor Details

SLReadLocalVariableNode

public SLReadLocalVariableNode()

Method Details

getSlot

protected abstract int getSlot()

Returns the descriptor of the accessed local variable. The implementation of this method is created by the Truffle DSL based on the NodeField annotation on the class.

readLong

protected long readLong(com.oracle.truffle.api.frame.VirtualFrame frame)

readBoolean

protected boolean readBoolean(com.oracle.truffle.api.frame.VirtualFrame frame)

readObject

protected Object readObject(com.oracle.truffle.api.frame.VirtualFrame frame)

hasTag

public boolean hasTag(Class<? extends com.oracle.truffle.api.instrumentation.Tag> tag)

Specified by:

hasTag in interface com.oracle.truffle.api.instrumentation.InstrumentableNode

Overrides:

hasTag in class SLExpressionNode

getNodeObject

public Object getNodeObject()