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annotate test/compiler/macronodes/TestEliminateAllocationPhi.java @ 20996:5e78d067ebbe

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Do not build IGV in gate when running on SPARC
author Stefan Anzinger <stefan.anzinger@oracle.com>
date Thu, 16 Apr 2015 19:00:45 +0200
parents f8afcfbdbf1c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
20452
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
f8afcfbdbf1c 8046698: assert(false) failed: only Initialize or AddP expected macro.cpp:943
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
f8afcfbdbf1c 8046698: assert(false) failed: only Initialize or AddP expected macro.cpp:943
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 /*
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25 * @test
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26 * @bug 8046698
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27 * @summary PhiNode inserted between AllocateNode and Initialization node confuses allocation elimination
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28 * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement TestEliminateAllocationPhi
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29 *
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30 */
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31
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32 public class TestEliminateAllocationPhi {
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33
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34 // This will return I when called from m(0 and once optimized will
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35 // go away but this will confuse escape analysis in m(): it will
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36 // find I as non escaping but non scalar replaceable. In its own
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37 // method so that we can make the profile of the if() branch look
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38 // like it's taken sometimes.
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39 static Integer m2(Integer I, int i) {
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40 for (; i < 10; i=(i+2)*(i+2)) {
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41 }
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42 if (i == 121) {
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43 return II;
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44 }
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45 return I;
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46 }
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47
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48 static Integer II = new Integer(42);
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49
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50 static int m(int[] integers, boolean flag) {
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51 int j = 0;
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52 while(true) {
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53 try {
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54 int k = integers[j++];
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55 // A branch that will cause loop unswitching
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56 if (flag) {
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57 k += 42;
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58 }
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59 if (k < 1000) {
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60 throw new Exception();
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61 }
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62 // Because of the try/catch the Allocate node for this
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63 // new will be in the loop while the Initialization
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64 // node will be outside the loop. When loop
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65 // unswitching happens, the Allocate node will be
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66 // cloned and the results of both will be inputs to a
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67 // Phi that will be between the Allocate nodes and the
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68 // Initialization nodes.
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69 Integer I = new Integer(k);
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70
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71 I = m2(I, 0);
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72
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73 int i = I.intValue();
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74 return i;
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75 } catch(Exception e) {
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76 }
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77 }
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78 }
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79
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80 static public void main(String[] args) {
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81 for (int i = 0; i < 5000; i++) {
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82 m2(null, 1);
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83 }
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84
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85 int[] integers = { 2000 };
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86 for (int i = 0; i < 6000; i++) {
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87 m(integers, (i%2) == 0);
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88 }
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89 int[] integers2 = { 1, 2, 3, 4, 5, 2000 };
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90 for (int i = 0; i < 10000; i++) {
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91 m(integers2, (i%2) == 0);
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92 }
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93 }
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94 }