1 /*
   2  * Copyright (c) 2016, 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.hotspot.test;
  24 
  25 import org.graalvm.compiler.api.directives.GraalDirectives;
  26 import org.junit.Assert;
  27 import org.junit.Test;
  28 
  29 /**
  30  * Test on-stack-replacement with Graal. The test manually triggers a Graal OSR-compilation which is
  31  * later invoked when hitting the backedge counter overflow.
  32  */
  33 public class GraalOSRTest extends GraalOSRTestBase {
  34 
  35     @Test
  36     public void testOSR01() {
  37         try {
  38             testOSR(getInitialOptions(), "testReduceLoop");
  39         } catch (Throwable t) {
  40             Assert.assertEquals("OSR compilation without OSR entry loop.", t.getMessage());
  41         }
  42     }
  43 
  44     @Test
  45     public void testOSR02() {
  46         testOSR(getInitialOptions(), "testSequentialLoop");
  47     }
  48 
  49     @Test
  50     public void testOSR03() {
  51         testOSR(getInitialOptions(), "testNonReduceLoop");
  52     }
  53 
  54     static int limit = 10000;
  55 
  56     public static int sideEffect;
  57 
  58     public static ReturnValue testReduceLoop() {
  59         for (int i = 0; i < limit * limit; i++) {
  60             GraalDirectives.blackhole(i);
  61             if (GraalDirectives.inCompiledCode()) {
  62                 return ReturnValue.SUCCESS;
  63             }
  64         }
  65         return ReturnValue.FAILURE;
  66     }
  67 
  68     public static ReturnValue testSequentialLoop() {
  69         ReturnValue ret = ReturnValue.FAILURE;
  70         for (int i = 1; i < limit * limit; i++) {
  71             GraalDirectives.blackhole(i);
  72             if (i % 7 == 0) {
  73                 ret = ReturnValue.SUCCESS;
  74             }
  75         }
  76         GraalDirectives.controlFlowAnchor();
  77         if (sideEffect == 123) {
  78             return ReturnValue.SIDE;
  79         }
  80         for (int i = 1; i < limit * limit; i++) {
  81             GraalDirectives.blackhole(i);
  82             if (i % 33 == 0) {
  83                 ret = ReturnValue.SUCCESS;
  84             }
  85         }
  86         GraalDirectives.controlFlowAnchor();
  87         return ret;
  88     }
  89 
  90     public static ReturnValue testNonReduceLoop() {
  91         ReturnValue ret = ReturnValue.FAILURE;
  92         for (int i = 0; i < limit * limit; i++) {
  93             GraalDirectives.blackhole(i);
  94             if (i % 33 == 0) {
  95                 ret = ReturnValue.SUCCESS;
  96             }
  97         }
  98         GraalDirectives.controlFlowAnchor();
  99         return ret;
 100     }
 101 
 102 }