com.oracle.truffle.js.nodes.access.JSGuardDisconnectedArgumentRead Maven / Gradle / Ivy

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 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
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package com.oracle.truffle.js.nodes.access;

import java.util.Set;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Cached.Exclusive;
import com.oracle.truffle.api.dsl.Cached.Shared;
import com.oracle.truffle.api.dsl.Executed;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.instrumentation.StandardTags;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.api.profiles.InlinedConditionProfile;
import com.oracle.truffle.api.strings.TruffleString;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.nodes.ReadNode;
import com.oracle.truffle.js.nodes.RepeatableNode;
import com.oracle.truffle.js.nodes.instrumentation.JSTags;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.ReadVariableTag;
import com.oracle.truffle.js.nodes.instrumentation.NodeObjectDescriptor;
import com.oracle.truffle.js.runtime.builtins.JSAbstractArgumentsArray;
import com.oracle.truffle.js.runtime.builtins.JSArgumentsArray;
import com.oracle.truffle.js.runtime.builtins.JSArgumentsObject;
import com.oracle.truffle.js.runtime.objects.Undefined;

public abstract class JSGuardDisconnectedArgumentRead extends JavaScriptNode implements RepeatableNode, ReadNode {
    private final int argumentIndex;
    @Child @Executed JavaScriptNode argumentsArrayNode;
    @Child private ReadElementNode readElementNode;
    private final TruffleString name;

    JSGuardDisconnectedArgumentRead(int index, ReadElementNode readElementNode, JavaScriptNode argumentsArray, TruffleString name) {
        this.argumentIndex = index;
        this.argumentsArrayNode = argumentsArray;
        this.readElementNode = readElementNode;
        this.name = name;
    }

    public static JSGuardDisconnectedArgumentRead create(int index, ReadElementNode readElementNode, JavaScriptNode argumentsArray, TruffleString name) {
        return JSGuardDisconnectedArgumentReadNodeGen.create(index, readElementNode, argumentsArray, name);
    }

    @Override
    public boolean hasTag(Class tag) {
        if ((tag == ReadVariableTag.class || tag == StandardTags.ReadVariableTag.class)) {
            return true;
        } else {
            return super.hasTag(tag);
        }
    }

    @Override
    public Object getNodeObject() {
        NodeObjectDescriptor descriptor = JSTags.createNodeObjectDescriptor("name", name);
        descriptor.addProperty(StandardTags.ReadVariableTag.NAME, name);
        return descriptor;
    }

    @Specialization(guards = "!isArgumentsDisconnected(argumentsArray)")
    public Object doObject(JSArgumentsObject argumentsArray,
                    @Cached @Shared InlinedConditionProfile unconnected) {
        assert JSArgumentsArray.isJSArgumentsObject(argumentsArray);
        if (unconnected.profile(this, argumentIndex >= JSAbstractArgumentsArray.getConnectedArgumentCount(argumentsArray))) {
            return Undefined.instance;
        } else {
            return readElementNode.executeWithTargetAndIndex(argumentsArray, argumentIndex);
        }
    }

    public final int getIndex() {
        return argumentIndex;
    }

    @Specialization(guards = "isArgumentsDisconnected(argumentsArray)")
    public Object doObjectDisconnected(JSArgumentsObject argumentsArray,
                    @Cached @Exclusive InlinedConditionProfile wasDisconnected,
                    @Cached @Shared InlinedConditionProfile unconnected) {
        assert JSArgumentsArray.isJSArgumentsObject(argumentsArray);
        if (wasDisconnected.profile(this, JSAbstractArgumentsArray.wasIndexDisconnected(argumentsArray, argumentIndex))) {
            return JSAbstractArgumentsArray.getDisconnectedIndexValue(argumentsArray, argumentIndex);
        } else if (unconnected.profile(this, argumentIndex >= JSAbstractArgumentsArray.getConnectedArgumentCount(argumentsArray))) {
            return Undefined.instance;
        } else {
            return readElementNode.executeWithTargetAndIndex(argumentsArray, argumentIndex);
        }
    }

    @Override
    protected JavaScriptNode copyUninitialized(Set> materializedTags) {
        return JSGuardDisconnectedArgumentReadNodeGen.create(argumentIndex, cloneUninitialized(readElementNode, materializedTags), cloneUninitialized(argumentsArrayNode, materializedTags), name);
    }
}