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/*
* Copyright (c) 2022, 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.
*/
package compiler.c2.irTests;
import compiler.lib.ir_framework.*;
/*
* @test
* @bug 8297724
* @library /test/lib /
* @requires vm.compiler2.enabled
* @run driver compiler.c2.irTests.TestLSMMissedEmptyLoop
*/
public class TestLSMMissedEmptyLoop {
public static void main(String[] args) {
TestFramework.runWithFlags("-XX:LoopMaxUnroll=0");
TestFramework.runWithFlags("-XX:-UseCountedLoopSafepoints", "-XX:LoopMaxUnroll=0");
TestFramework.run();
TestFramework.runWithFlags("-XX:-UseCountedLoopSafepoints");
}
static double doubleField;
@ForceInline
public static void testHelper(int i, double d) {
if (i != 42) {
doubleField = d;
}
}
@Test
@IR(failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
public static void test1() {
double d = 1;
for (int i = 0; i < 1000; i++) {
d = d * 2;
}
int i = 0;
for (i = 0; i < 42; i++) {
}
testHelper(i, d);
}
@Run(test = "test1")
private void test1_runner() {
testHelper(-42, 42);
test1();
}
@Test
@IR(applyIf = { "LoopStripMiningIter", "0" }, failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
@IR(applyIf = { "LoopStripMiningIter", "> 0" }, counts = {IRNode.COUNTED_LOOP, ">= 2" })
public static void test2() {
double d = 1;
for (int j = 0; j < 10; j++) {
for (int i = 0; i < 1000; i++) {
d = d * 2;
}
}
int i = 0;
for (i = 0; i < 42; i++) {
}
testHelper(i, d);
}
@Run(test = "test2")
private void test2_runner() {
testHelper(-42, 42);
test2();
}
@Test
@IR(failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
public static void test3() {
double d = 1;
for (int i = 0; i < 1000; i++) {
d = d * 2;
}
for (int i = 0; i < 1000; i++) {
d = d * 2;
}
int i = 0;
for (i = 0; i < 42; i++) {
}
testHelper(i, d);
}
@Run(test = "test3")
private void test3_runner() {
testHelper(-42, 42);
test1();
}
@Test
@IR(applyIf = { "LoopStripMiningIter", "0" }, failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
@IR(applyIf = { "LoopStripMiningIter", "> 0" }, counts = {IRNode.COUNTED_LOOP, ">= 3" })
public static void test4() {
double d = 1;
for (int j = 0; j < 10; j++) {
for (int i = 0; i < 1000; i++) {
d = d * 2;
}
for (int i = 0; i < 1000; i++) {
d = d * 2;
}
}
int i = 0;
for (i = 0; i < 42; i++) {
}
testHelper(i, d);
}
@Run(test = "test4")
private void test4_runner() {
testHelper(-42, 42);
test4();
}
}
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