78 lines
2.3 KiB
Java
78 lines
2.3 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8078426
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* @summary split if finds predicates on several incoming paths when unswitched's loops are optimized out
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*
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseOnStackReplacement
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* -XX:-BackgroundCompilation -XX:-UseCompressedOops
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* compiler.loopopts.TestSplitIfUnswitchedLoopsEliminated
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*/
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package compiler.loopopts;
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public class TestSplitIfUnswitchedLoopsEliminated {
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static class A {
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int f;
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}
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static A aa = new A();
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static A aaa = new A();
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static int test_helper(int stop, boolean unswitch) {
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A a = null;
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for (int i = 3; i < 10; i++) {
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if (unswitch) {
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a = null;
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} else {
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a = aa;
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int v = a.f;
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}
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}
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if (stop != 4) {
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a = aaa;
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}
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if (a != null) {
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return a.f;
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}
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return 0;
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}
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static int test(boolean unswitch) {
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int stop = 1;
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for (; stop < 3; stop *= 4) {
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}
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return test_helper(stop, unswitch);
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}
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public static void main(String[] args) {
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for (int i = 0; i < 20000; i++) {
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test_helper(10, i%2 == 0);
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test(i%2 == 0);
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}
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}
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}
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