hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/PushNodesThroughPiTest.java
author iveresov
Fri, 07 Jul 2017 09:40:47 -0700
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parent 46344 694c102fd8ed
permissions -rw-r--r--
8183991: Update Graal Reviewed-by: kvn
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/*
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 * Copyright (c) 2013, 2015, 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.core.test;
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import org.graalvm.compiler.debug.DebugContext;
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import org.graalvm.compiler.debug.DebugDumpScope;
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import org.graalvm.compiler.nodes.ParameterNode;
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import org.graalvm.compiler.nodes.PiNode;
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import org.graalvm.compiler.nodes.StructuredGraph;
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import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
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import org.graalvm.compiler.nodes.calc.IsNullNode;
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import org.graalvm.compiler.nodes.memory.ReadNode;
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import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode;
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import org.graalvm.compiler.nodes.spi.LoweringTool;
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import org.graalvm.compiler.nodes.type.StampTool;
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import org.graalvm.compiler.phases.common.CanonicalizerPhase;
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import org.graalvm.compiler.phases.common.LoweringPhase;
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import org.graalvm.compiler.phases.tiers.PhaseContext;
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import org.junit.Assert;
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import org.junit.Ignore;
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import org.junit.Test;
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import jdk.vm.ci.meta.ResolvedJavaField;
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import jdk.vm.ci.meta.ResolvedJavaType;
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public class PushNodesThroughPiTest extends GraalCompilerTest {
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    public static class A {
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        public long x = 20;
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    }
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    public static class B extends A {
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        public long y = 10;
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    }
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    public static class C extends B {
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        public long z = 5;
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    }
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    public static long test1Snippet(A a) {
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        C c = (C) a;
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        long ret = c.x; // this can be pushed before the checkcast
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        ret += c.y; // not allowed to push
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        ret += c.z; // not allowed to push
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        // the null-check should be canonicalized with the null-check of the checkcast
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        ret += c != null ? 100 : 200;
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        return ret;
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    }
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    @Ignore
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    @Test
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    @SuppressWarnings("try")
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    public void test1() {
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        final String snippet = "test1Snippet";
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        DebugContext debug = getDebugContext();
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        try (DebugContext.Scope s = debug.scope("PushThroughPi", new DebugDumpScope(snippet))) {
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            StructuredGraph graph = compileTestSnippet(snippet);
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            for (ReadNode rn : graph.getNodes().filter(ReadNode.class)) {
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                OffsetAddressNode address = (OffsetAddressNode) rn.getAddress();
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                long disp = address.getOffset().asJavaConstant().asLong();
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                ResolvedJavaType receiverType = StampTool.typeOrNull(address.getBase());
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                ResolvedJavaField field = receiverType.findInstanceFieldWithOffset(disp, rn.getStackKind());
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                assert field != null : "Node " + rn + " tries to access a field which doesn't exists for this type";
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                if (field.getName().equals("x")) {
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                    Assert.assertTrue(address.getBase() instanceof ParameterNode);
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                } else {
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                    Assert.assertTrue(address.getBase().toString(), address.getBase() instanceof PiNode);
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                }
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            }
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            Assert.assertTrue(graph.getNodes().filter(IsNullNode.class).count() == 1);
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        } catch (Throwable e) {
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            throw debug.handle(e);
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        }
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    }
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    private StructuredGraph compileTestSnippet(final String snippet) {
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        StructuredGraph graph = parseEager(snippet, AllowAssumptions.NO);
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        PhaseContext context = new PhaseContext(getProviders());
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        CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
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        new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
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        canonicalizer.apply(graph, context);
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        canonicalizer.apply(graph, context);
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        return graph;
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    }
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}