| /* |
| * Copyright (c) 2011, 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.graalvm.compiler.debug.DebugContext; |
| import org.graalvm.compiler.debug.DebugDumpScope; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; |
| import org.graalvm.compiler.phases.common.CanonicalizerPhase; |
| import org.graalvm.compiler.phases.common.inlining.InliningPhase; |
| import org.graalvm.compiler.phases.tiers.HighTierContext; |
| import org.junit.Test; |
| |
| /** |
| * In the following tests, the usages of local variable "a" are replaced with the integer constant |
| * 0. Then canonicalization is applied and it is verified that the resulting graph is equal to the |
| * graph of the method that just has a "return 1" statement in it. |
| */ |
| public class DegeneratedLoopsTest extends GraalCompilerTest { |
| |
| private static final String REFERENCE_SNIPPET = "referenceSnippet"; |
| |
| @SuppressWarnings("all") |
| public static int referenceSnippet(int a) { |
| return a; |
| } |
| |
| @Test |
| public void test1() { |
| test("test1Snippet"); |
| } |
| |
| private static class UnresolvedException extends RuntimeException { |
| |
| private static final long serialVersionUID = 5215434338750728440L; |
| |
| static { |
| if (true) { |
| throw new UnsupportedOperationException("this class may never be initialized"); |
| } |
| } |
| } |
| |
| @SuppressWarnings("all") |
| public static int test1Snippet(int a) { |
| for (;;) { |
| try { |
| test(); |
| break; |
| } catch (UnresolvedException e) { |
| } |
| } |
| return a; |
| } |
| |
| private static void test() { |
| |
| } |
| |
| @SuppressWarnings("try") |
| private void test(final String snippet) { |
| DebugContext debug = getDebugContext(); |
| try (DebugContext.Scope s = debug.scope("DegeneratedLoopsTest", new DebugDumpScope(snippet))) { |
| StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES); |
| HighTierContext context = getDefaultHighTierContext(); |
| new InliningPhase(new CanonicalizerPhase()).apply(graph, context); |
| new CanonicalizerPhase().apply(graph, context); |
| debug.dump(DebugContext.BASIC_LEVEL, graph, "Graph"); |
| StructuredGraph referenceGraph = parseEager(REFERENCE_SNIPPET, AllowAssumptions.YES); |
| debug.dump(DebugContext.BASIC_LEVEL, referenceGraph, "ReferenceGraph"); |
| assertEquals(referenceGraph, graph); |
| } catch (Throwable e) { |
| throw debug.handle(e); |
| } |
| } |
| } |