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test/compiler/7044738/Test7044738.java@2bac854670c0 (annotated)

test/compiler/7044738/Test7044738.java

Wed, 22 Jan 2014 12:37:28 -0800

author

katleman

date

Wed, 22 Jan 2014 12:37:28 -0800

changeset 6575

2bac854670c0

parent 0

f90c822e73f8

permissions

-rw-r--r--

Added tag jdk8u5-b05 for changeset b90de55aca30

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	/**
aoqi@0	26	* @test
aoqi@0	27	* @bug 7044738
aoqi@0	28	* @summary Loop unroll optimization causes incorrect result
aoqi@0	29	*
aoqi@0	30	* @run main/othervm -Xbatch Test7044738
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	public class Test7044738 {
aoqi@0	34
aoqi@0	35	private static final int INITSIZE = 10000;
aoqi@0	36	public int d[] = { 1, 2, 3, 4 };
aoqi@0	37	public int i, size;
aoqi@0	38
aoqi@0	39	private static int iter = 5;
aoqi@0	40
aoqi@0	41	boolean done() { return (--iter > 0); }
aoqi@0	42
aoqi@0	43	public static void main(String args[]) {
aoqi@0	44	Test7044738 t = new Test7044738();
aoqi@0	45	t.test();
aoqi@0	46	}
aoqi@0	47
aoqi@0	48	int test() {
aoqi@0	49
aoqi@0	50	while (done()) {
aoqi@0	51	size = INITSIZE;
aoqi@0	52
aoqi@0	53	for (i = 0; i < size; i++) {
aoqi@0	54	d[0] = d[1]; // 2
aoqi@0	55	d[1] = d[2]; // 3
aoqi@0	56	d[2] = d[3]; // 4
aoqi@0	57	d[3] = d[0]; // 2
aoqi@0	58
aoqi@0	59	d[0] = d[1]; // 3
aoqi@0	60	d[1] = d[2]; // 4
aoqi@0	61	d[2] = d[3]; // 2
aoqi@0	62	d[3] = d[0]; // 3
aoqi@0	63
aoqi@0	64	d[0] = d[1]; // 4
aoqi@0	65	d[1] = d[2]; // 2
aoqi@0	66	d[2] = d[3]; // 3
aoqi@0	67	d[3] = d[0]; // 4
aoqi@0	68
aoqi@0	69	d[0] = d[1]; // 2
aoqi@0	70	d[1] = d[2]; // 3
aoqi@0	71	d[2] = d[3]; // 4
aoqi@0	72	d[3] = d[0]; // 2
aoqi@0	73
aoqi@0	74	d[0] = d[1]; // 3
aoqi@0	75	d[1] = d[2]; // 4
aoqi@0	76	d[2] = d[3]; // 2
aoqi@0	77	d[3] = d[0]; // 3
aoqi@0	78
aoqi@0	79	d[0] = d[1]; // 4
aoqi@0	80	d[1] = d[2]; // 2
aoqi@0	81	d[2] = d[3]; // 3
aoqi@0	82	d[3] = d[0]; // 4
aoqi@0	83
aoqi@0	84	d[0] = d[1]; // 2
aoqi@0	85	d[1] = d[2]; // 3
aoqi@0	86	d[2] = d[3]; // 4
aoqi@0	87	d[3] = d[0]; // 2
aoqi@0	88
aoqi@0	89	d[0] = d[1]; // 3
aoqi@0	90	d[1] = d[2]; // 4
aoqi@0	91	d[2] = d[3]; // 2
aoqi@0	92	d[3] = d[0]; // 3
aoqi@0	93	}
aoqi@0	94
aoqi@0	95	// try to defeat dead code elimination
aoqi@0	96	if (d[0] == d[1]) {
aoqi@0	97	System.out.println("test failed: iter=" + iter + " i=" + i + " d[] = { " + d[0] + ", " + d[1] + ", " + d[2] + ", " + d[3] + " } ");
aoqi@0	98	System.exit(97);
aoqi@0	99	}
aoqi@0	100	}
aoqi@0	101	return d[3];
aoqi@0	102	}
aoqi@0	103
aoqi@0	104	}