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/*
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* Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.replacements.processor;
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import static org.graalvm.compiler.processor.AbstractProcessor.getAnnotationValue;
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import static org.graalvm.compiler.processor.AbstractProcessor.getAnnotationValueList;
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import static org.graalvm.compiler.processor.AbstractProcessor.getSimpleName;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Formatter;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.annotation.processing.Messager;
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import javax.lang.model.element.AnnotationMirror;
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import javax.lang.model.element.Element;
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import javax.lang.model.element.ElementKind;
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import javax.lang.model.element.ExecutableElement;
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import javax.lang.model.element.Modifier;
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import javax.lang.model.element.TypeElement;
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import javax.lang.model.element.VariableElement;
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import javax.lang.model.type.ArrayType;
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import javax.lang.model.type.TypeKind;
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import javax.lang.model.type.TypeMirror;
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import javax.lang.model.type.TypeVariable;
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import javax.lang.model.util.ElementFilter;
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import javax.tools.Diagnostic.Kind;
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import org.graalvm.compiler.processor.AbstractProcessor;
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/**
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* Handler for the {@value #NODE_INFO_CLASS_NAME} annotation.
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*/
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public final class NodeIntrinsicHandler extends AnnotationHandler {
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static final String CONSTANT_NODE_PARAMETER_CLASS_NAME = "org.graalvm.compiler.graph.Node.ConstantNodeParameter";
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static final String MARKER_TYPE_CLASS_NAME = "org.graalvm.compiler.nodeinfo.StructuralInput.MarkerType";
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static final String GRAPH_BUILDER_CONTEXT_CLASS_NAME = "org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext";
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static final String STRUCTURAL_INPUT_CLASS_NAME = "org.graalvm.compiler.nodeinfo.StructuralInput";
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static final String RESOLVED_JAVA_METHOD_CLASS_NAME = "jdk.vm.ci.meta.ResolvedJavaMethod";
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static final String RESOLVED_JAVA_TYPE_CLASS_NAME = "jdk.vm.ci.meta.ResolvedJavaType";
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static final String VALUE_NODE_CLASS_NAME = "org.graalvm.compiler.nodes.ValueNode";
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static final String STAMP_CLASS_NAME = "org.graalvm.compiler.core.common.type.Stamp";
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static final String NODE_CLASS_NAME = "org.graalvm.compiler.graph.Node";
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static final String NODE_INFO_CLASS_NAME = "org.graalvm.compiler.nodeinfo.NodeInfo";
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static final String NODE_INTRINSIC_CLASS_NAME = "org.graalvm.compiler.graph.Node.NodeIntrinsic";
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static final String INJECTED_NODE_PARAMETER_CLASS_NAME = "org.graalvm.compiler.graph.Node.InjectedNodeParameter";
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public NodeIntrinsicHandler(AbstractProcessor processor) {
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super(processor, NODE_INTRINSIC_CLASS_NAME);
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}
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@Override
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public void process(Element element, AnnotationMirror annotation, PluginGenerator generator) {
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if (element.getKind() != ElementKind.METHOD) {
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assert false : "Element is guaranteed to be a method.";
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return;
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}
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ExecutableElement intrinsicMethod = (ExecutableElement) element;
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Messager messager = processor.env().getMessager();
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if (!intrinsicMethod.getModifiers().contains(Modifier.STATIC)) {
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messager.printMessage(Kind.ERROR, String.format("A @%s method must be static.", getSimpleName(NODE_INTRINSIC_CLASS_NAME)), element, annotation);
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}
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if (!intrinsicMethod.getModifiers().contains(Modifier.NATIVE)) {
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messager.printMessage(Kind.ERROR, String.format("A @%s method must be native.", getSimpleName(NODE_INTRINSIC_CLASS_NAME)), element, annotation);
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}
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TypeMirror nodeClassMirror = getAnnotationValue(annotation, "value", TypeMirror.class);
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TypeElement nodeClass = processor.asTypeElement(nodeClassMirror);
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if (processor.env().getTypeUtils().isSameType(nodeClassMirror, annotation.getAnnotationType())) {
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// default value
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Element enclosingElement = intrinsicMethod.getEnclosingElement();
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while (enclosingElement != null && enclosingElement.getKind() != ElementKind.CLASS) {
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enclosingElement = enclosingElement.getEnclosingElement();
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}
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if (enclosingElement != null) {
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nodeClass = (TypeElement) enclosingElement;
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}
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}
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TypeMirror returnType = intrinsicMethod.getReturnType();
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if (returnType instanceof TypeVariable) {
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messager.printMessage(Kind.ERROR, "@NodeIntrinsic cannot have a generic return type.", element, annotation);
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}
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boolean injectedStampIsNonNull = getAnnotationValue(annotation, "injectedStampIsNonNull", Boolean.class);
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if (returnType.getKind() == TypeKind.VOID) {
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for (VariableElement parameter : intrinsicMethod.getParameters()) {
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if (processor.getAnnotation(parameter, processor.getType(INJECTED_NODE_PARAMETER_CLASS_NAME)) != null) {
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messager.printMessage(Kind.ERROR, "@NodeIntrinsic with an injected Stamp parameter cannot have a void return type.", element, annotation);
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break;
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}
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}
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}
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TypeMirror[] constructorSignature = constructorSignature(intrinsicMethod);
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Map<ExecutableElement, String> nonMatches = new HashMap<>();
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List<ExecutableElement> factories = findIntrinsifyFactoryMethod(nodeClass, constructorSignature, nonMatches, injectedStampIsNonNull);
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List<ExecutableElement> constructors = Collections.emptyList();
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if (nodeClass.getModifiers().contains(Modifier.ABSTRACT)) {
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if (factories.isEmpty()) {
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messager.printMessage(Kind.ERROR, String.format("Cannot make a node intrinsic for abstract class %s.", nodeClass.getSimpleName()), element, annotation);
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}
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} else if (!isNodeType(nodeClass)) {
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if (factories.isEmpty()) {
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messager.printMessage(Kind.ERROR, String.format("%s is not a subclass of %s.", nodeClass.getSimpleName(), processor.getType(NODE_CLASS_NAME)), element, annotation);
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}
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} else {
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TypeMirror ret = returnType;
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if (processor.env().getTypeUtils().isAssignable(ret, processor.getType(STRUCTURAL_INPUT_CLASS_NAME))) {
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checkInputType(nodeClass, ret, element, annotation);
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}
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constructors = findConstructors(nodeClass, constructorSignature, nonMatches, injectedStampIsNonNull);
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}
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Formatter msg = new Formatter();
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if (factories.size() > 1) {
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msg.format("Found more than one factory in %s matching node intrinsic:", nodeClass);
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for (ExecutableElement candidate : factories) {
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msg.format("%n %s", candidate);
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}
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messager.printMessage(Kind.ERROR, msg.toString(), intrinsicMethod, annotation);
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} else if (constructors.size() > 1) {
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msg.format("Found more than one constructor in %s matching node intrinsic:", nodeClass);
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for (ExecutableElement candidate : constructors) {
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msg.format("%n %s", candidate);
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}
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messager.printMessage(Kind.ERROR, msg.toString(), intrinsicMethod, annotation);
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} else if (factories.size() == 1) {
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generator.addPlugin(new GeneratedNodeIntrinsicPlugin.CustomFactoryPlugin(intrinsicMethod, factories.get(0), constructorSignature));
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} else if (constructors.size() == 1) {
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generator.addPlugin(new GeneratedNodeIntrinsicPlugin.ConstructorPlugin(intrinsicMethod, constructors.get(0), constructorSignature));
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} else {
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msg.format("Could not find any factories or constructors in %s matching node intrinsic", nodeClass);
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if (!nonMatches.isEmpty()) {
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msg.format("%nFactories and constructors that failed to match:");
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for (Map.Entry<ExecutableElement, String> e : nonMatches.entrySet()) {
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msg.format("%n %s: %s", e.getKey(), e.getValue());
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}
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}
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messager.printMessage(Kind.ERROR, msg.toString(), intrinsicMethod, annotation);
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}
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}
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private void checkInputType(TypeElement nodeClass, TypeMirror returnType, Element element, AnnotationMirror annotation) {
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String inputType = getInputType(returnType, element, annotation);
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if (!inputType.equals("Value")) {
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boolean allowed = false;
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List<VariableElement> allowedTypes = getAnnotationValueList(processor.getAnnotation(nodeClass, processor.getType(NODE_INFO_CLASS_NAME)), "allowedUsageTypes", VariableElement.class);
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for (VariableElement allowedType : allowedTypes) {
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if (allowedType.getSimpleName().contentEquals(inputType)) {
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allowed = true;
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break;
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}
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}
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if (!allowed) {
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processor.env().getMessager().printMessage(Kind.ERROR, String.format("@NodeIntrinsic returns input type %s, but only %s is allowed.", inputType, allowedTypes), element, annotation);
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}
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}
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}
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private String getInputType(TypeMirror type, Element element, AnnotationMirror annotation) {
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TypeElement current = processor.asTypeElement(type);
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while (current != null) {
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AnnotationMirror markerType = processor.getAnnotation(current, processor.getType(MARKER_TYPE_CLASS_NAME));
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if (markerType != null) {
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return getAnnotationValue(markerType, "value", VariableElement.class).getSimpleName().toString();
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}
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current = processor.asTypeElement(current.getSuperclass());
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}
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processor.env().getMessager().printMessage(Kind.ERROR,
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String.format("The class %s is a subclass of StructuralInput, but isn't annotated with @MarkerType. %s", type, element.getAnnotationMirrors()),
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element, annotation);
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return "Value";
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}
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private boolean isNodeType(TypeElement nodeClass) {
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return processor.env().getTypeUtils().isSubtype(nodeClass.asType(), processor.getType(NODE_CLASS_NAME));
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}
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private TypeMirror[] constructorSignature(ExecutableElement method) {
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TypeMirror[] parameters = new TypeMirror[method.getParameters().size()];
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for (int i = 0; i < method.getParameters().size(); i++) {
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VariableElement parameter = method.getParameters().get(i);
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if (processor.getAnnotation(parameter, processor.getType(CONSTANT_NODE_PARAMETER_CLASS_NAME)) == null) {
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parameters[i] = processor.getType(VALUE_NODE_CLASS_NAME);
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} else {
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TypeMirror type = parameter.asType();
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if (isTypeCompatible(type, processor.getType("java.lang.Class"))) {
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type = processor.getType(RESOLVED_JAVA_TYPE_CLASS_NAME);
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}
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parameters[i] = type;
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}
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}
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return parameters;
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}
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private List<ExecutableElement> findConstructors(TypeElement nodeClass, TypeMirror[] signature, Map<ExecutableElement, String> nonMatches, boolean requiresInjectedStamp) {
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List<ExecutableElement> constructors = ElementFilter.constructorsIn(nodeClass.getEnclosedElements());
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List<ExecutableElement> found = new ArrayList<>(constructors.size());
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for (ExecutableElement constructor : constructors) {
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if (matchSignature(0, constructor, signature, nonMatches, requiresInjectedStamp)) {
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found.add(constructor);
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}
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}
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return found;
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}
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private List<ExecutableElement> findIntrinsifyFactoryMethod(TypeElement nodeClass, TypeMirror[] signature, Map<ExecutableElement, String> nonMatches, boolean requiresInjectedStamp) {
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List<ExecutableElement> methods = ElementFilter.methodsIn(nodeClass.getEnclosedElements());
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List<ExecutableElement> found = new ArrayList<>(methods.size());
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for (ExecutableElement method : methods) {
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if (!method.getSimpleName().toString().equals("intrinsify")) {
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continue;
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}
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if (method.getParameters().size() < 2) {
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continue;
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}
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VariableElement firstArg = method.getParameters().get(0);
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if (!isTypeCompatible(firstArg.asType(), processor.getType(GRAPH_BUILDER_CONTEXT_CLASS_NAME))) {
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continue;
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}
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VariableElement secondArg = method.getParameters().get(1);
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if (!isTypeCompatible(secondArg.asType(), processor.getType(RESOLVED_JAVA_METHOD_CLASS_NAME))) {
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continue;
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}
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if (method.getReturnType().getKind() != TypeKind.BOOLEAN) {
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continue;
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}
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if (matchSignature(2, method, signature, nonMatches, requiresInjectedStamp)) {
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found.add(method);
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}
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}
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return found;
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}
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private boolean matchSignature(int numSkippedParameters, ExecutableElement method, TypeMirror[] signature, Map<ExecutableElement, String> nonMatches, boolean requiresInjectedStamp) {
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int sIdx = 0;
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int cIdx = numSkippedParameters;
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boolean missingStampArgument = requiresInjectedStamp;
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while (cIdx < method.getParameters().size()) {
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VariableElement parameter = method.getParameters().get(cIdx++);
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TypeMirror paramType = parameter.asType();
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if (processor.getAnnotation(parameter, processor.getType(INJECTED_NODE_PARAMETER_CLASS_NAME)) != null) {
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if (missingStampArgument && processor.env().getTypeUtils().isSameType(paramType, processor.getType(STAMP_CLASS_NAME))) {
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missingStampArgument = false;
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}
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// skip injected parameters
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continue;
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}
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if (missingStampArgument) {
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nonMatches.put(method, String.format("missing injected %s argument", processor.getType(STAMP_CLASS_NAME)));
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return false;
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}
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if (cIdx == method.getParameters().size() && paramType.getKind() == TypeKind.ARRAY) {
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// last argument of constructor is varargs, match remaining intrinsic arguments
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TypeMirror varargsType = ((ArrayType) paramType).getComponentType();
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while (sIdx < signature.length) {
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if (!isTypeCompatible(varargsType, signature[sIdx++])) {
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nonMatches.put(method, String.format("the types of argument %d are incompatible: %s != %s", sIdx, varargsType, signature[sIdx - 1]));
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return false;
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}
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}
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} else if (sIdx >= signature.length) {
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// too many arguments in intrinsic method
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nonMatches.put(method, "too many arguments");
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return false;
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} else if (!isTypeCompatible(paramType, signature[sIdx++])) {
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nonMatches.put(method, String.format("the type of argument %d is incompatible: %s != %s", sIdx, paramType, signature[sIdx - 1]));
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return false;
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}
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}
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if (missingStampArgument) {
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nonMatches.put(method, String.format("missing injected %s argument", processor.getType(STAMP_CLASS_NAME)));
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return false;
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}
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if (sIdx != signature.length) {
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nonMatches.put(method, "not enough arguments");
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return false;
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}
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return true;
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}
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private boolean isTypeCompatible(TypeMirror originalType, TypeMirror substitutionType) {
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TypeMirror original = originalType;
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TypeMirror substitution = substitutionType;
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if (needsErasure(original)) {
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original = processor.env().getTypeUtils().erasure(original);
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}
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if (needsErasure(substitution)) {
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substitution = processor.env().getTypeUtils().erasure(substitution);
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}
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return processor.env().getTypeUtils().isSameType(original, substitution);
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}
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private static boolean needsErasure(TypeMirror typeMirror) {
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return typeMirror.getKind() != TypeKind.NONE && typeMirror.getKind() != TypeKind.VOID && !typeMirror.getKind().isPrimitive() && typeMirror.getKind() != TypeKind.OTHER &&
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typeMirror.getKind() != TypeKind.NULL;
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}
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}
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