1 /*
   2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.core.test;
  26 
  27 import org.graalvm.compiler.debug.DebugContext;
  28 import org.graalvm.compiler.nodes.FrameState;
  29 import org.graalvm.compiler.nodes.StructuredGraph;
  30 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
  31 import org.graalvm.compiler.nodes.util.GraphUtil;
  32 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
  33 import org.graalvm.compiler.phases.tiers.PhaseContext;
  34 import org.junit.Test;
  35 
  36 public class PushThroughIfTest extends GraalCompilerTest {
  37 
  38     public int field1;
  39     public int field2;
  40 
  41     public int testSnippet(boolean b) {
  42         int i;
  43         if (b) {
  44             i = field1;
  45         } else {
  46             i = field1;
  47         }
  48         return i + field2;
  49     }
  50 
  51     @SuppressWarnings("unused")
  52     public int referenceSnippet(boolean b) {
  53         return field1 + field2;
  54     }
  55 
  56     @Test
  57     public void test1() {
  58         test("testSnippet", "referenceSnippet");
  59     }
  60 
  61     private void test(String snippet, String reference) {
  62         StructuredGraph graph = parseEager(snippet, AllowAssumptions.YES);
  63         DebugContext debug = graph.getDebug();
  64         debug.dump(DebugContext.BASIC_LEVEL, graph, "Graph");
  65         for (FrameState fs : graph.getNodes(FrameState.TYPE).snapshot()) {
  66             fs.replaceAtUsages(null);
  67             GraphUtil.killWithUnusedFloatingInputs(fs);
  68         }
  69         new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
  70         new CanonicalizerPhase().apply(graph, new PhaseContext(getProviders()));
  71 
  72         StructuredGraph referenceGraph = parseEager(reference, AllowAssumptions.YES);
  73         for (FrameState fs : referenceGraph.getNodes(FrameState.TYPE).snapshot()) {
  74             fs.replaceAtUsages(null);
  75             GraphUtil.killWithUnusedFloatingInputs(fs);
  76         }
  77         new CanonicalizerPhase().apply(referenceGraph, new PhaseContext(getProviders()));
  78         assertEquals(referenceGraph, graph);
  79     }
  80 }