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/*
 * Copyright (c) 2021, 2021, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.svm.hosted;

import java.util.function.Supplier;

import org.graalvm.compiler.nodes.ConstantNode;
import org.graalvm.compiler.nodes.FixedNode;
import org.graalvm.compiler.nodes.Invoke;
import org.graalvm.compiler.nodes.StructuredGraph;
import org.graalvm.compiler.nodes.extended.ForeignCallNode;
import org.graalvm.compiler.nodes.spi.CoreProviders;

import com.oracle.graal.pointsto.PointsToAnalysis;
import com.oracle.graal.pointsto.infrastructure.Universe;
import com.oracle.graal.pointsto.meta.AnalysisType;
import com.oracle.graal.pointsto.results.StrengthenGraphs;
import com.oracle.svm.core.SubstrateUtil;
import com.oracle.svm.core.annotate.Uninterruptible;
import com.oracle.svm.core.graal.nodes.LoweredDeadEndNode;
import com.oracle.svm.core.nodes.SubstrateMethodCallTargetNode;
import com.oracle.svm.core.snippets.SnippetRuntime;
import com.oracle.svm.hosted.meta.HostedType;

import jdk.vm.ci.meta.JavaMethodProfile;
import jdk.vm.ci.meta.JavaTypeProfile;

public class SubstrateStrengthenGraphs extends StrengthenGraphs {

    public SubstrateStrengthenGraphs(PointsToAnalysis bb, Universe converter) {
        super(bb, converter);
    }

    @Override
    protected AnalysisType getSingleImplementorType(AnalysisType originalType) {
        HostedType singleImplementorType = ((HostedType) converter.lookup(originalType)).getSingleImplementor();
        return singleImplementorType == null ? null : singleImplementorType.getWrapped();
    }

    @Override
    protected AnalysisType getStrengthenStampType(AnalysisType originalType) {
        HostedType strengthenStampType = ((HostedType) converter.lookup(originalType)).getStrengthenStampType();
        return strengthenStampType == null ? null : strengthenStampType.getWrapped();
    }

    @Override
    protected FixedNode createUnreachable(StructuredGraph graph, CoreProviders providers, Supplier message) {
        FixedNode unreachableNode = graph.add(new LoweredDeadEndNode());

        /*
         * To aid debugging of static analysis problems, we can print details about why the place is
         * unreachable before failing fatally. But since these strings are long and not useful for
         * non-VM developers, we only do it when assertions are enabled for the image builder. And
         * Uninterruptible methods might not be able to access the heap yet for the error message
         * constant, so we skip it for such methods too.
         */
        if (SubstrateUtil.assertionsEnabled()) {
            Uninterruptible uninterruptibleAnnotation = graph.method().getAnnotation(Uninterruptible.class);
            if (uninterruptibleAnnotation == null || uninterruptibleAnnotation.mayBeInlined()) {
                ConstantNode messageNode = ConstantNode.forConstant(providers.getConstantReflection().forString(message.get()), providers.getMetaAccess(), graph);
                ForeignCallNode foreignCallNode = graph.add(new ForeignCallNode(SnippetRuntime.UNSUPPORTED_FEATURE, messageNode));
                foreignCallNode.setNext(unreachableNode);
                unreachableNode = foreignCallNode;
            }
        }

        return unreachableNode;
    }

    @Override
    protected void setInvokeProfiles(Invoke invoke, JavaTypeProfile typeProfile, JavaMethodProfile methodProfile) {
        ((SubstrateMethodCallTargetNode) invoke.callTarget()).setProfiles(typeProfile, methodProfile);
    }
}