103 lines
3.4 KiB
Java
103 lines
3.4 KiB
Java
/*
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* Copyright (c) 2014, 2016, 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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/*
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* @test
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* @bug 8025505
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* @summary Constant folding deficiency
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* @library /tools/lib
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* @modules jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.main
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* jdk.jdeps/com.sun.tools.javap
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* @build toolbox.ToolBox toolbox.JavapTask
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* @run main ConstFoldTest
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*/
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import java.net.URL;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.List;
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import toolbox.JavapTask;
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import toolbox.Task;
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import toolbox.ToolBox;
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public class ConstFoldTest {
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public static void main(String... args) throws Exception {
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new ConstFoldTest().run();
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}
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// This is the test case. This class should end up
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// as straight-line code with no conditionals
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class CFTest {
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void m() {
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int x;
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if (1 != 2) x=1; else x=0;
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if (1 == 2) x=1; else x=0;
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if ("" != null) x=1; else x=0;
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if ("" == null) x=1; else x=0;
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if (null == null) x=1; else x=0;
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if (null != null) x=1; else x=0;
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x = 1 != 2 ? 1 : 0;
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x = 1 == 2 ? 1 : 0;
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x = "" != null ? 1 : 0;
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x = "" == null ? 1 : 0;
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x = null == null ? 1 : 0;
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x = null != null ? 1 : 0;
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boolean b;
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b = 1 != 2 && true;
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b = 1 == 2 || true;
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b = ("" != null) && true;
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b = ("" == null) || true;
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b = (null == null) && true;
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b = (null != null) || true;
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}
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}
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// All of the conditionals above should be eliminated.
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// these if* bytecodes should not be seen
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final String regex = "\\sif(?:null|nonnull|eq|ne){1}\\s";
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void run() throws Exception {
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ToolBox tb = new ToolBox();
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URL url = ConstFoldTest.class.getResource("ConstFoldTest$CFTest.class");
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Path file = Paths.get(url.toURI());
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List<String> result = new JavapTask(tb)
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.options("-c")
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.classes(file.toString())
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.run()
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.write(Task.OutputKind.DIRECT)
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.getOutputLines(Task.OutputKind.DIRECT);
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List<String> bad_codes = tb.grep(regex, result);
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if (!bad_codes.isEmpty()) {
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for (String code : bad_codes)
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System.out.println("Bad OpCode Found: " + code);
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throw new Exception("constant folding failed");
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}
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}
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}
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