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8262891: Compiler implementation for Pattern Matching for switch (Preview)

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Co-authored-by: Brian Goetz <briangoetz@openjdk.org>
Co-authored-by: Mandy Chung <mchung@openjdk.org>
Co-authored-by: Jan Lahoda <jlahoda@openjdk.org>
Reviewed-by: mcimadamore, forax, godin, psandoz, mchung
This commit is contained in:
Jan Lahoda 2021-06-07 07:01:30 +00:00
parent 3e48244084
commit 908aca29ca
78 changed files with 4795 additions and 292 deletions
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70
test/langtools/tools/javac/stackmap/OrdinarySwitchStackMapTest.java Normal file
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/*
* Copyright (c) 2021, 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.
*/
/*
* @test
* @bug 8262891
* @summary Verify StackMapTable is sensible for simple ordinary switches
* @library /tools/lib
* @modules jdk.compiler/com.sun.tools.javac.api
* jdk.compiler/com.sun.tools.javac.main
* jdk.jdeps/com.sun.tools.javap
* @build toolbox.ToolBox toolbox.JavapTask
* @run compile OrdinarySwitchStackMapTest.java
* @run main OrdinarySwitchStackMapTest
*/
import java.nio.file.Path;
import java.nio.file.Paths;
import toolbox.JavapTask;
import toolbox.Task;
import toolbox.ToolBox;
public class OrdinarySwitchStackMapTest {
class Test {
void method0(int i) throws Exception {
switch (i) {
case 0: System.err.println(0); break;
case 1: System.err.println(1); break;
default: System.err.println(2); break;
}
}
}
public static void main(String args[]) throws Exception {
ToolBox tb = new ToolBox();
Path pathToClass = Paths.get(ToolBox.testClasses, "OrdinarySwitchStackMapTest$Test.class");
String javapOut = new JavapTask(tb)
.options("-v")
.classes(pathToClass.toString())
.run()
.getOutput(Task.OutputKind.DIRECT);
if (!javapOut.contains("StackMapTable: number_of_entries = 4"))
throw new AssertionError("The number of entries of the stack map "
+ "table should be equal to 4");
}
}