jdk-24/test/hotspot/jtreg/compiler/loopopts/TestEmptyLoopMultiplePhis.java
2023-01-26 07:41:15 +00:00

58 lines
1.8 KiB
Java

/*
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 8298118
* @summary Test that the JVM doesn't fail due to split-if causing empty loop to temporarily have more than one phi
*
* @run main/othervm -Xcomp -XX:CompileCommand=compileonly,compiler.loopopts.TestEmptyLoopMultiplePhis::test
* compiler.loopopts.TestEmptyLoopMultiplePhis
*/
package compiler.loopopts;
public class TestEmptyLoopMultiplePhis {
static int[] iArrFld = new int[10];
static int x;
static void test(int a) {
int i;
for (int j = 6; j < 129; ++j) {
a >>= 37388;
a += 1001;
}
a >>>= -8;
for (i = 0; i < 8; ++i) {
iArrFld[i] = i;
}
for (int j = i; j < 7; ) {
x = a;
}
}
public static void main(String[] strArr) {
test(2);
}
}