117 lines
3.9 KiB
Java
117 lines
3.9 KiB
Java
/*
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* Copyright (c) 2020, 2023, Oracle and/or its affiliates. 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;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.process.ProcessTools;
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/*
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* @test
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* @bug 8247408
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* @summary C2 should convert ((var&16) == 16) to ((var&16) != 0) for power-of-two constants
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* @library /test/lib /
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*
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* @requires vm.flagless
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* @requires os.arch=="aarch64" | os.arch=="amd64" | os.arch == "ppc64le" | os.arch == "riscv64"
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* @requires vm.debug == true & vm.compiler2.enabled
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*
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* @run driver compiler.c2.TestBit
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*/
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public class TestBit {
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static void runTest(String testName) throws Exception {
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String className = TestBit.class.getName();
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String[] procArgs = {
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"-Xbatch",
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"-XX:-TieredCompilation",
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"-XX:+PrintOptoAssembly",
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"-XX:CompileCommand=compileonly," + className + "::tst*",
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className, testName};
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ProcessBuilder pb = ProcessTools.createLimitedTestJavaProcessBuilder(procArgs);
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OutputAnalyzer output = new OutputAnalyzer(pb.start());
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String expectedTestBitInstruction =
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"ppc64le".equals(System.getProperty("os.arch")) ? "ANDI" :
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"aarch64".equals(System.getProperty("os.arch")) ? "tb" :
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"amd64".equals(System.getProperty("os.arch")) ? "test" :
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"riscv64".equals(System.getProperty("os.arch")) ? "andi" : null;
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if (expectedTestBitInstruction != null) {
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output.shouldContain(expectedTestBitInstruction);
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} else {
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System.err.println("unexpected os.arch");
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}
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}
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static final int ITER = 100000; // ~ Tier4CompileThreshold + compilation time
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// dummy volatile variable
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public static volatile long c = 0;
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// C2 is expected to generate test bit instruction on the test
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static void tstBitLong(long value) {
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if (1L == (1L & value)) {
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c++;
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} else {
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c--;
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}
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}
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// C2 is expected to generate test bit instruction on the test
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static void tstBitInt(int value) {
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if (1 == (1 & value)) {
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c++;
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} else {
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c--;
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}
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}
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public static void main(String[] args) throws Exception {
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if (args.length == 0) {
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// Fork VMs to check their debug compiler output
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runTest("tstBitLong");
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runTest("tstBitInt");
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}
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if (args.length > 0) {
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// We are in a forked VM to execute the named test
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String testName = args[0];
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switch (testName) {
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case "tstBitLong":
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for (int i = 0; i < ITER; i++) {
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tstBitLong(i % 2);
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}
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break;
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case "tstBitInt":
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for (int i = 0; i < ITER; i++) {
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tstBitInt(i % 2);
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}
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break;
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default:
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throw new RuntimeException("unexpected test name " + testName);
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}
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}
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}
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}
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