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/*
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2022, Arm Limited. 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 8289954
* @summary C2: Assert failed in PhaseCFG::verify() after JDK-8183390
*
* @run main/othervm -Xcomp -Xbatch
* -XX:CompileOnly=compiler.loopopts.TestUnreachableInnerLoop::*
* compiler.loopopts.TestUnreachableInnerLoop
*/
package compiler.loopopts;
public class TestUnreachableInnerLoop {
public static int field = 0;
public static int arr[] = new int[500];
public static void fun() {
for (int elem : arr) {
int x = 1, y = 2, z = 3;
int i, j;
// This is a good loop
for (i = 2; i < 63; i++) {
arr[i] = arr[i] + 3592870;
}
// The inner loop looks quite complex but it's unreachable
// code as loop condition "k < 2" never satisfies
for (j = 3; j < 63; j++) {
for (int k = j; k < 2; k++) {
arr[j] <<= k;
try {
x = k / i;
y = j % 6;
arr[k] = 88 % elem;
} catch (ArithmeticException ex) {}
switch (2) {
case 2: {
try {
y = arr[j] % y;
z = x / 2345;
elem = j % -2;
} catch (ArithmeticException ex) {}
break;
}
case 3: {
y = arr[j] / 2;
z -= k;
break;
}
}
arr[100] -= j;
field += k;
}
}
}
}
public static void main(String[] args) {
fun();
}
}
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