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.core.test;
  24 
  25 import org.junit.Test;
  26 
  27 /**
  28  * Collection of tests for
  29  * {@link org.graalvm.compiler.phases.common.DominatorConditionalEliminationPhase} including those
  30  * that triggered bugs in this phase.
  31  */
  32 public class ConditionalEliminationTest7 extends ConditionalEliminationTestBase {
  33 
  34     @SuppressWarnings("all")
  35     public static int test1Snippet(int a, Object b) {
  36         int sum = 0;
  37         for (int j = 0;; ++j) {
  38             ++sum;
  39             if (b instanceof String) {
  40                 if (sum == 100) {
  41                     break;
  42                 }
  43             }
  44         }
  45         String s = (String) b;
  46         return s.length() + sum;
  47     }
  48 
  49     @Test
  50     public void test1() {
  51         // One loop exit is skipped.
  52         testProxies("test1Snippet", 1);
  53     }
  54 
  55     @SuppressWarnings("all")
  56     public static int test2Snippet(int a, Object b) {
  57         int sum = 0;
  58         for (int j = 0;; ++j) {
  59             ++sum;
  60             if (b instanceof String) {
  61                 break;
  62             }
  63         }
  64         String s = (String) b;
  65         return s.length() + sum;
  66     }
  67 
  68     @Test
  69     public void test2() {
  70         // The loop exit is the anchor => no proxy necessary.
  71         testProxies("test2Snippet", 0);
  72     }
  73 
  74     @SuppressWarnings("all")
  75     public static int test3Snippet(int a, Object b) {
  76         int sum = a;
  77         outer: while (true) {
  78             sum++;
  79             while (sum++ != 20) {
  80                 while (sum++ != 30) {
  81                     while (sum++ != 40) {
  82                         while (sum++ != 50) {
  83                             if (b instanceof String) {
  84                                 break outer;
  85                             }
  86                         }
  87                     }
  88                 }
  89             }
  90         }
  91         String s = (String) b;
  92         return s.length() + sum;
  93     }
  94 
  95     @Test
  96     public void test3() {
  97         // The break skips over 4 other loops.
  98         testProxies("test3Snippet", 4);
  99     }
 100 }