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/*
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* Copyright (c) 2015, 2019, 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;
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import org.graalvm.compiler.api.replacements.SnippetReflectionProvider;
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import org.graalvm.compiler.core.common.type.StampPair;
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import org.graalvm.compiler.nodes.ConstantNode;
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import org.graalvm.compiler.nodes.calc.FloatingNode;
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import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderTool;
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import org.graalvm.compiler.nodes.graphbuilderconf.ParameterPlugin;
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import jdk.vm.ci.meta.Constant;
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import jdk.vm.ci.meta.MetaAccessProvider;
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/**
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* A {@link ParameterPlugin} that binds constant values to some parameters.
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*/
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public class ConstantBindingParameterPlugin implements ParameterPlugin {
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private final Object[] constantArgs;
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private final MetaAccessProvider metaAccess;
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private final SnippetReflectionProvider snippetReflection;
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/**
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* Creates a plugin that will create {@link ConstantNode}s for each parameter with an index
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* equal to that of a non-null object in {@code constantArgs} (from which the
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* {@link ConstantNode} is created if it isn't already a {@link ConstantNode}).
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*/
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public ConstantBindingParameterPlugin(Object[] constantArgs, MetaAccessProvider metaAccess, SnippetReflectionProvider snippetReflection) {
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this.constantArgs = constantArgs;
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this.metaAccess = metaAccess;
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this.snippetReflection = snippetReflection;
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}
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@Override
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public FloatingNode interceptParameter(GraphBuilderTool b, int index, StampPair stamp) {
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if (index < constantArgs.length) {
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Object arg = constantArgs[index];
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if (arg != null) {
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ConstantNode constantNode;
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if (arg instanceof ConstantNode) {
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ConstantNode otherCon = (ConstantNode) arg;
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if (otherCon.graph() != b.getGraph()) {
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/*
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* This is a node from another graph, so copy over extra state into a new
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* ConstantNode.
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*/
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constantNode = ConstantNode.forConstant(stamp.getTrustedStamp(), otherCon.getValue(), otherCon.getStableDimension(), otherCon.isDefaultStable(), metaAccess);
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} else {
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constantNode = otherCon;
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}
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} else if (arg instanceof Constant) {
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constantNode = ConstantNode.forConstant(stamp.getTrustedStamp(), (Constant) arg, metaAccess);
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} else {
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constantNode = ConstantNode.forConstant(snippetReflection.forBoxed(stamp.getTrustedStamp().getStackKind(), arg), metaAccess);
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}
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return constantNode;
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}
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}
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return null;
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}
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}
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