jdk-24/test/hotspot/jtreg/compiler/rangechecks/TestRangeCheckCmpUOverflowVsSub.java
2023-09-06 11:36:13 +00:00

66 lines
2.3 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 8299959
* @summary In CmpU::Value, the sub computation may be narrower than the overflow computation.
* @requires vm.compiler2.enabled
*
* @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+StressCCP -Xcomp -XX:-TieredCompilation
* -XX:CompileCommand=compileonly,compiler.rangechecks.TestRangeCheckCmpUOverflowVsSub::test
* -XX:RepeatCompilation=50
* compiler.rangechecks.TestRangeCheckCmpUOverflowVsSub
*/
package compiler.rangechecks;
public class TestRangeCheckCmpUOverflowVsSub {
static int arr[] = new int[400];
public static void main(String[] strArr) {
for (int i = 0; i < 10; i++) {
test(); // repeat for multiple compilations
}
}
static void test() {
for(int i = 0; i < 50_000; i++) {} //empty loop - trigger OSR faster
int val;
int zero = arr[5];
int i = 1;
do {
for (int j = 1; j < 3; j++) {
for (int k = 2; k > i; k -= 3) {
try {
val = arr[i + 1] % k;
val = arr[i - 1] % zero;
val = arr[k - 1];
} catch (ArithmeticException e) {} // catch div by zero
}
}
} while (++i < 3);
}
}