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/*
* Copyright (c) 2022, 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.
*/
package compiler.c2.irTests.loopOpts;
import compiler.lib.ir_framework.*;
/*
* @test
* @bug 8267265
* @summary Test that Ideal transformations of CountedLoopNode* are being performed as expected.
* @library /test/lib /
* @run driver compiler.c2.irTests.loopOpts.LoopIdealizationTests
*/
public class LoopIdealizationTests {
public static void main(String[] args) {
TestFramework.run();
}
@DontInline
private void blackhole() { }
@Test
@IR(failOn = {IRNode.MUL, IRNode.DIV, IRNode.ADD, IRNode.LOOP, IRNode.COUNTED_LOOP, IRNode.COUNTED_LOOP_MAIN, IRNode.CALL})
// Checks that a for loop with 0 iterations is removed
public void zeroIterForLoop() {
for (int i = 0; i < 0; i++) {
System.out.println(13 / 17 * 23 + 1);
}
}
@Test
@IR(failOn = {IRNode.ADD, IRNode.LOOP, IRNode.COUNTED_LOOP, IRNode.COUNTED_LOOP_MAIN, IRNode.CALL})
// Checks that a for loop with 1 iteration doesn't have CountedLoop nodes
public void iterOneBreakForLoop() {
for (int i = 0; i < 500; i++) {
break;
}
}
@Test
@IR(failOn = {IRNode.ADD, IRNode.LOOP, IRNode.COUNTED_LOOP, IRNode.COUNTED_LOOP_MAIN, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a for loop with 1 iteration is simplified to straight code
public void oneIterForLoop() {
for (int i = 0; i < 1; i++) {
this.blackhole();
}
}
@Test
@IR(failOn = {IRNode.ADD, IRNode.LOOP, IRNode.COUNTED_LOOP, IRNode.COUNTED_LOOP_MAIN, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a for loop with 1 iteration is simplified to straight code
public void oneIterForLoop1() {
for (int i = 0; i < 500; i++) {
this.blackhole();
break;
}
}
@Test
@IR(failOn = {IRNode.ADD, IRNode.LOOP, IRNode.COUNTED_LOOP, IRNode.COUNTED_LOOP_MAIN, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a for loop with 1 iteration is simplified to straight code
public void oneIterForLoop2() {
for (int i = 0; i < 500; i++) {
this.blackhole();
if (i == 0) {
break;
}
else {
this.blackhole();
i++;
}
}
}
@Test
@IR(failOn = {IRNode.LOOP, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a while loop with 1 iteration is simplified to straight code
public void oneIterWhileLoop() {
while (true) {
this.blackhole();
break;
}
}
@Test
@IR(failOn = {IRNode.ADD, IRNode.LOOP, IRNode.COUNTED_LOOP, IRNode.COUNTED_LOOP_MAIN, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a while loop with 1 iteration is simplified to straight code
public void oneIterWhileLoop1() {
int i = 0;
while (i < 1) {
this.blackhole();
i++;
}
}
@Test
@IR(failOn = {IRNode.ADD, IRNode.LOOP, IRNode.COUNTED_LOOP, IRNode.COUNTED_LOOP_MAIN, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a while loop with 1 iteration is simplified to straight code
public void oneIterWhileLoop2() {
int i = 0;
while (i < 500) {
this.blackhole();
if (i == 0) {
break;
}
else {
this.blackhole();
i++;
}
}
}
@Test
@IR(failOn = {IRNode.LOOP, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a while loop with 1 iteration is simplified to straight code
public void oneIterDoWhileLoop() {
do {
this.blackhole();
break;
} while (true);
}
@Test
@IR(failOn = {IRNode.LOOP, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a while loop with 1 iteration is simplified to straight code
public void oneIterDoWhileLoop1() {
do {
this.blackhole();
} while (false);
}
@Test
@IR(failOn = {IRNode.ADD, IRNode.LOOP, IRNode.TRAP})
@IR(counts = {IRNode.CALL, "1"})
// Checks that a while loop with 1 iteration is simplified to straight code
public void oneIterDoWhileLoop2() {
int i = 0;
do {
this.blackhole();
i++;
} while (i == -1);
}
}
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