002aff0a75
Skip the logic that set the value of the Phi iv if the exit condition is "not equal" Reviewed-by: thartmann, mdoerr
86 lines
2.6 KiB
Java
86 lines
2.6 KiB
Java
/*
|
|
* Copyright (c) 2017, 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 8190375
|
|
* @summary Bad range for IV phi when exit condition is a not equal test
|
|
* @run main/othervm -XX:-TieredCompilation TestCountedLoopBadIVRange
|
|
*
|
|
*/
|
|
|
|
|
|
public class TestCountedLoopBadIVRange {
|
|
|
|
static int test1(int[] arr) {
|
|
int j = 0;
|
|
int res = 0;
|
|
for (int i = 0; i < 2; i++) {
|
|
// When entered with j == 10, exit condition never
|
|
// succeeds so range of values for j can't be computed
|
|
// from exit condition
|
|
for (; j != 5; j++) {
|
|
if (j >= 20) {
|
|
break;
|
|
}
|
|
res += arr[j];
|
|
}
|
|
j = 10;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int test2(int[] arr) {
|
|
int j = 10;
|
|
int res = 0;
|
|
for (int i = 0; i < 2; i++) {
|
|
// Same as above but loop variable is decreasing
|
|
for (; j != 5; j--) {
|
|
if (j < 0) {
|
|
break;
|
|
}
|
|
res += arr[j];
|
|
}
|
|
j = 1;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
public static void main(String[] args) {
|
|
int[] arr = new int[20];
|
|
for (int i = 0; i < arr.length; i++) {
|
|
arr[i] = i;
|
|
}
|
|
for (int i = 0; i < 20_000; i++) {
|
|
int res = test1(arr);
|
|
if (res != 155) {
|
|
throw new RuntimeException("Incorrect result " + res);
|
|
}
|
|
res = test2(arr);
|
|
if (res != 41) {
|
|
throw new RuntimeException("Incorrect result " + res);
|
|
}
|
|
}
|
|
}
|
|
}
|