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8261812: C2 compilation fails with assert(!had_error) failed: bad dom…
…inance Reviewed-by: kvn, thartmann
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| @@ -0,0 +1,108 @@ | ||
| /* | ||
| * Copyright (c) 2021, Red Hat, Inc. 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 8261812 | ||
| * @summary C2 compilation fails with assert(!had_error) failed: bad dominance | ||
| * | ||
| * @run main/othervm -XX:-BackgroundCompilation TestValAtSafepointOverflowsInt | ||
| * | ||
| */ | ||
|
|
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| public class TestValAtSafepointOverflowsInt { | ||
| private static volatile int volatileField; | ||
|
|
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| public static void main(String[] args) { | ||
| for (int i = 0; i < 20_000; i++) { | ||
| testByte(true, false); | ||
| testByte(false, false); | ||
| testShort(true, false); | ||
| testShort(false, false); | ||
| testChar(true, false); | ||
| testChar(false, false); | ||
| } | ||
| testByte(true, true); | ||
| testShort(true, true); | ||
| testChar(true, true); | ||
| } | ||
|
|
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| private static Object testByte(boolean flag, boolean flag2) { | ||
| int i; | ||
| // loop to delay constant folding | ||
| for (i = 0; i < 9; i++) { | ||
| } | ||
| C obj = new C(); | ||
| if (flag) { | ||
| obj.byteField = (byte)(1 << i); | ||
| } else { | ||
| obj.byteField = (byte)(1 << (i+1)); | ||
| } | ||
| // Phi for byte here for uncommon trap in never taken path below | ||
| // Phi inputs don't fit in a byte. Phi transfomed to top. | ||
| if (flag2) { | ||
| return obj; | ||
| } | ||
| return null; | ||
| } | ||
|
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| private static Object testShort(boolean flag, boolean flag2) { | ||
| int i; | ||
| for (i = 0; i < 17; i++) { | ||
| } | ||
| C obj = new C(); | ||
| if (flag) { | ||
| obj.shortField = (short)(1 << i); | ||
| } else { | ||
| obj.shortField = (short)(1 << (i+1)); | ||
| } | ||
| if (flag2) { | ||
| return obj; | ||
| } | ||
| return null; | ||
| } | ||
|
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| private static Object testChar(boolean flag, boolean flag2) { | ||
| int i; | ||
| for (i = 0; i < 17; i++) { | ||
| } | ||
| C obj = new C(); | ||
| if (flag) { | ||
| obj.charField = (char)(1 << i); | ||
| } else { | ||
| obj.charField = (char)(1 << (i+1)); | ||
| } | ||
| if (flag2) { | ||
| return obj; | ||
| } | ||
| return null; | ||
| } | ||
|
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| static class C { | ||
| byte byteField; | ||
| short shortField; | ||
| char charField; | ||
| } | ||
|
|
||
| } |
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