--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/FloatingReadTest.java 2016-12-07 13:48:21.738468110 -0800 @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2011, 2015, 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 + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.core.test; + +import org.junit.Assert; +import org.junit.Test; + +import org.graalvm.compiler.debug.Debug; +import org.graalvm.compiler.debug.Debug.Scope; +import org.graalvm.compiler.debug.DebugDumpScope; +import org.graalvm.compiler.graph.Node; +import org.graalvm.compiler.nodes.ReturnNode; +import org.graalvm.compiler.nodes.StructuredGraph; +import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; +import org.graalvm.compiler.nodes.extended.MonitorExit; +import org.graalvm.compiler.nodes.memory.FloatingReadNode; +import org.graalvm.compiler.nodes.spi.LoweringTool; +import org.graalvm.compiler.phases.common.CanonicalizerPhase; +import org.graalvm.compiler.phases.common.FloatingReadPhase; +import org.graalvm.compiler.phases.common.LoweringPhase; +import org.graalvm.compiler.phases.tiers.PhaseContext; + +public class FloatingReadTest extends GraphScheduleTest { + + public static class Container { + + public int a; + } + + public static void changeField(Container c) { + c.a = 0xcafebabe; + } + + public static synchronized int test1Snippet() { + Container c = new Container(); + return c.a; + } + + @Test + public void test1() { + test("test1Snippet"); + } + + @SuppressWarnings("try") + private void test(final String snippet) { + try (Scope s = Debug.scope("FloatingReadTest", new DebugDumpScope(snippet))) { + + StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES); + PhaseContext context = new PhaseContext(getProviders()); + new LoweringPhase(new CanonicalizerPhase(), LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context); + new FloatingReadPhase().apply(graph); + + ReturnNode returnNode = null; + MonitorExit monitorexit = null; + + for (Node n : graph.getNodes()) { + if (n instanceof ReturnNode) { + assert returnNode == null; + returnNode = (ReturnNode) n; + } else if (n instanceof MonitorExit) { + monitorexit = (MonitorExit) n; + } + } + + Debug.dump(Debug.BASIC_LOG_LEVEL, graph, "After lowering"); + + Assert.assertNotNull(returnNode); + Assert.assertNotNull(monitorexit); + Assert.assertTrue(returnNode.result() instanceof FloatingReadNode); + + FloatingReadNode read = (FloatingReadNode) returnNode.result(); + + assertOrderedAfterSchedule(graph, read, (Node) monitorexit); + } catch (Throwable e) { + throw Debug.handle(e); + } + } +}