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