1 /*
   2  * Copyright (c) 2015, 2015, 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 package org.graalvm.compiler.jtt.backend;
  24 
  25 import static org.graalvm.compiler.api.directives.GraalDirectives.LIKELY_PROBABILITY;
  26 import static org.graalvm.compiler.api.directives.GraalDirectives.injectBranchProbability;
  27 
  28 import java.lang.reflect.Method;
  29 
  30 import org.junit.Test;
  31 
  32 import org.graalvm.compiler.core.common.GraalOptions;
  33 import org.graalvm.compiler.jtt.JTTTest;
  34 import org.graalvm.compiler.options.OptionValue;
  35 import org.graalvm.compiler.options.OptionValue.OverrideScope;
  36 
  37 public class ConstantPhiTest extends JTTTest {
  38 
  39     public static int test(int i, int x) throws Throwable {
  40         int r;
  41         if (injectBranchProbability(LIKELY_PROBABILITY, i < 0)) {
  42             r = 42;
  43         } else {
  44             r = x;
  45         }
  46         destroyCallerSavedValues();
  47         return r;
  48     }
  49 
  50     protected static void destroyCallerSavedValues() throws Throwable {
  51         Class<ConstantPhiTest> c = ConstantPhiTest.class;
  52         Method m = c.getMethod("destroyCallerSavedValues0");
  53         m.invoke(null);
  54     }
  55 
  56     public static void destroyCallerSavedValues0() {
  57     }
  58 
  59     @Test
  60     @SuppressWarnings("try")
  61     public void run0() {
  62         try (OverrideScope os = OptionValue.override(GraalOptions.MaximumInliningSize, -1)) {
  63             runTest("test", 0, 0xDEADDEAD);
  64         }
  65     }
  66 
  67     @Test
  68     @SuppressWarnings("try")
  69     public void run1() {
  70         try (OverrideScope os = OptionValue.override(GraalOptions.MaximumInliningSize, -1)) {
  71             runTest("test", -1, 0xDEADDEAD);
  72         }
  73     }
  74 
  75     @Test
  76     @SuppressWarnings("try")
  77     public void run2() {
  78         try (OverrideScope os = OptionValue.override(GraalOptions.MaximumInliningSize, -1)) {
  79             runTest("test", 1, 0xDEADDEAD);
  80         }
  81     }
  82 }