141 lines
4.5 KiB
Java
141 lines
4.5 KiB
Java
/*
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* Copyright (c) 2022, Red Hat, Inc. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package compiler.c2.irTests;
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import compiler.lib.ir_framework.*;
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/*
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* @test
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* @bug 8262721
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* @summary Add Tests to verify single iteration loops are properly optimized
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* @library /test/lib /
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* @requires vm.compiler2.enabled
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* @run driver compiler.c2.irTests.TestFewIterationsCountedLoop
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*/
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public class TestFewIterationsCountedLoop {
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public static void main(String[] args) {
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TestFramework.runWithFlags("-XX:LoopUnrollLimit=0");
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TestFramework.run();
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}
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static volatile int barrier;
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static final Object object = new Object();
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@Test
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@IR(failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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public static void singleIterationFor() {
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for (int i = 0; i < 1; i++) {
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barrier = 0x42; // something that can't be optimized out
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}
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}
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@Test
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@IR(failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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public static void singleIterationWhile() {
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int i = 0;
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while (i < 1) {
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barrier = 0x42;
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i++;
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}
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}
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@Test
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@IR(failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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@Warmup(1) // So C2 can't rely on profile data
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public static void singleIterationDoWhile() {
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int i = 0;
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do {
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synchronized(object) {} // so loop head is not cloned by ciTypeFlow
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barrier = 0x42;
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i++;
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} while (i < 1);
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}
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@Test
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@IR(applyIf = { "LoopUnrollLimit", "0" }, counts = {IRNode.COUNTED_LOOP, "1" })
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@IR(applyIf = { "LoopUnrollLimit", "> 0" }, failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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public static void twoIterationsFor() {
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for (int i = 0; i < 2; i++) {
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barrier = 0x42; // something that can't be optimized out
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}
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}
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@Test
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@IR(applyIf = { "LoopUnrollLimit", "0" }, counts = {IRNode.COUNTED_LOOP, "1" })
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@IR(applyIf = { "LoopUnrollLimit", "> 0" }, failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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public static void twoIterationsWhile() {
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int i = 0;
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while (i < 2) {
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barrier = 0x42;
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i++;
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}
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}
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@Test
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@IR(applyIf = { "LoopUnrollLimit", "0" }, counts = {IRNode.COUNTED_LOOP, "1" })
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@IR(applyIf = { "LoopUnrollLimit", "> 0" }, failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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public static void twoIterationsDoWhile() {
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int i = 0;
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do {
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synchronized(object) {} // so loop head is not cloned by ciTypeFlow
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barrier = 0x42;
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i++;
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} while (i < 2);
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}
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@Test
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@IR(applyIf = { "LoopUnrollLimit", "0" }, counts = {IRNode.COUNTED_LOOP, "1" })
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@IR(applyIf = { "LoopUnrollLimit", "> 0" }, failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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public static void threadIterationsFor() {
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for (int i = 0; i < 2; i++) {
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barrier = 0x42; // something that can't be optimized out
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}
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}
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@Test
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@IR(applyIf = { "LoopUnrollLimit", "0" }, counts = {IRNode.COUNTED_LOOP, "1" })
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@IR(applyIf = { "LoopUnrollLimit", "> 0" }, failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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public static void threeIterationsWhile() {
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int i = 0;
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while (i < 2) {
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barrier = 0x42;
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i++;
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}
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}
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@Test
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@IR(applyIf = { "LoopUnrollLimit", "0" }, counts = {IRNode.COUNTED_LOOP, "1" })
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@IR(applyIf = { "LoopUnrollLimit", "> 0" }, failOn = {IRNode.COUNTED_LOOP, IRNode.LOOP })
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public static void threeIterationsDoWhile() {
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int i = 0;
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do {
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synchronized(object) {} // so loop head is not cloned by ciTypeFlow
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barrier = 0x42;
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i++;
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} while (i < 2);
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}
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}
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