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 * Copyright (c) 2012, 2019, 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.

 *

 * 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

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package org.graalvm.compiler.core.test;

import org.graalvm.compiler.nodes.StructuredGraph;

import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;

import org.graalvm.compiler.nodes.ValueNode;

import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext;

import org.graalvm.compiler.nodes.graphbuilderconf.InlineInvokePlugin;

import org.graalvm.compiler.nodes.spi.CoreProviders;

import org.graalvm.compiler.phases.OptimisticOptimizations;

import org.graalvm.compiler.phases.common.CanonicalizerPhase;

import org.graalvm.compiler.phases.common.FrameStateAssignmentPhase;

import org.graalvm.compiler.phases.common.GuardLoweringPhase;

import org.graalvm.compiler.phases.tiers.MidTierContext;

import org.junit.Ignore;

import org.junit.Test;

import jdk.vm.ci.meta.ResolvedJavaMethod;

public class CompareCanonicalizerTest3 extends GraalCompilerTest {

    @SuppressWarnings("unused") private static int sink0;

    @SuppressWarnings("unused") private static int sink1;

    @Ignore("Subword input cannot be trusted.")

    @Test

    public void test00() {

        assertCanonicallyEqual("integerTestCanonicalization00", "referenceSnippet00");

    }

    public static void integerTestCanonicalization00(char a) {

        if (a - 1 < a) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    @SuppressWarnings("unused")

    public static void referenceSnippet00(char a) {

        sink1 = 0;

    }

    @Ignore("Needs better stamp support for unsigned ranges")

    @Test

    public void test01() {

        assertCanonicallyEqual("integerTestCanonicalization01", "referenceSnippet01");

    }

    public static void integerTestCanonicalization01(char a) {

        if (Integer.compareUnsigned(a - 1, a) < 0) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    public static void referenceSnippet01(char a) {

        if (a != 0) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    @Ignore("Needs better stamp support for unsigned ranges")

    @Test

    public void test1() {

        assertCanonicallyEqual("integerTestCanonicalization1", "referenceSnippet1");

    }

    public static void integerTestCanonicalization1(char[] a) {

        int len = a.length;

        if (Integer.compareUnsigned(len - 2, len) < 0) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    public static void referenceSnippet1(char[] a) {

        int len = a.length;

        if (Integer.compareUnsigned(len, 2) >= 0) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    @Test

    public void test2() {

        assertCanonicallyEqual("integerTestCanonicalization2", "referenceSnippet2");

    }

    public static void integerTestCanonicalization2(int a) {

        if (a - 1 < a) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    public static void referenceSnippet2(int a) {

        if (a != Integer.MIN_VALUE) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    @Test

    public void test3() {

        assertCanonicallyEqual("integerTestCanonicalization3", "referenceSnippet3");

    }

    public static void integerTestCanonicalization3(int a) {

        if (a - 2 < a) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    public static void referenceSnippet3(int a) {

        if (a >= Integer.MIN_VALUE + 2) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    @Test

    public void test4() {

        assertCanonicallyEqual("integerTestCanonicalization4", "referenceSnippet4");

    }

    public static void integerTestCanonicalization4(int a) {

        if (a + 1 < a) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    public static void referenceSnippet4(int a) {

        if (a == Integer.MAX_VALUE) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    @Test

    public void test5() {

        assertCanonicallyEqual("integerTestCanonicalization5", "referenceSnippet5");

    }

    public static void integerTestCanonicalization5(int a) {

        if (a + 2 < a) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    public static void referenceSnippet5(int a) {

        if (a > Integer.MAX_VALUE - 2) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    @Test

    public void test6() {

        assertCanonicallyEqual("integerTestCanonicalization6", "referenceSnippet6");

    }

    public static void integerTestCanonicalization6(int a) {

        if (a < a + 1) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    public static void referenceSnippet6(int a) {

        if (a != Integer.MAX_VALUE) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    @Test

    public void test7() {

        assertCanonicallyEqual("integerTestCanonicalization7", "referenceSnippet7");

    }

    public static void integerTestCanonicalization7(int a) {

        if (a < a + 2) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    public static void referenceSnippet7(int a) {

        if (a <= Integer.MAX_VALUE - 2) {

            sink1 = 0;

        } else {

            sink0 = -1;

        }

    }

    protected void assertCanonicallyEqual(String snippet, String reference) {

        StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);

        CoreProviders context = getProviders();

        CanonicalizerPhase canonicalizer = new CanonicalizerPhase();

        canonicalizer.apply(graph, context);

        new GuardLoweringPhase().apply(graph, new MidTierContext(getProviders(), getTargetProvider(), OptimisticOptimizations.ALL, graph.getProfilingInfo()));

        new FrameStateAssignmentPhase().apply(graph);

        canonicalizer.apply(graph, context);

        StructuredGraph referenceGraph = parseEager(reference, AllowAssumptions.YES);

        canonicalizer.apply(referenceGraph, context);

        new GuardLoweringPhase().apply(referenceGraph, new MidTierContext(getProviders(), getTargetProvider(), OptimisticOptimizations.ALL, graph.getProfilingInfo()));

        new FrameStateAssignmentPhase().apply(referenceGraph);

        canonicalizer.apply(referenceGraph, context);

        canonicalizer.apply(referenceGraph, context);

        assertEquals(referenceGraph, graph, true, true);

    }

    @Override

    protected InlineInvokePlugin.InlineInfo bytecodeParserShouldInlineInvoke(GraphBuilderContext b, ResolvedJavaMethod method, ValueNode[] args) {

        return InlineInvokePlugin.InlineInfo.createStandardInlineInfo(method);

    }

}