jdk8-mips64-public/langtools: test/tools/javac/8009170/RedundantByteCodeInArrayTest.java@959103a6100f

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http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17

     1 /*

     2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @bug 8009170

    27  * @summary Regression: javac generates redundant bytecode in assignop involving

    28  * arrays

    29  * @run main RedundantByteCodeInArrayTest

    30  */

    32 import java.io.File;

    33 import java.io.IOException;

    35 import com.sun.tools.classfile.Attribute;

    36 import com.sun.tools.classfile.ClassFile;

    37 import com.sun.tools.classfile.Code_attribute;

    38 import com.sun.tools.classfile.Code_attribute.InvalidIndex;

    39 import com.sun.tools.classfile.ConstantPool;

    40 import com.sun.tools.classfile.ConstantPoolException;

    41 import com.sun.tools.classfile.Descriptor.InvalidDescriptor;

    42 import com.sun.tools.classfile.Method;

    44 public class RedundantByteCodeInArrayTest {

    45     public static void main(String[] args)

    46             throws IOException, ConstantPoolException, InvalidDescriptor, InvalidIndex {

    47         new RedundantByteCodeInArrayTest()

    48                 .checkClassFile(new File(System.getProperty("test.classes", "."),

    49                     RedundantByteCodeInArrayTest.class.getName() + ".class"));

    50     }

    52     void arrMethod(int[] array, int p, int inc) {

    53         array[p] += inc;

    54     }

    56     void checkClassFile(File file)

    57             throws IOException, ConstantPoolException, InvalidDescriptor, InvalidIndex {

    58         ClassFile classFile = ClassFile.read(file);

    59         ConstantPool constantPool = classFile.constant_pool;

    61         //lets get all the methods in the class file.

    62         for (Method method : classFile.methods) {

    63             if (method.getName(constantPool).equals("arrMethod")) {

    64                 Code_attribute code = (Code_attribute) method.attributes

    65                         .get(Attribute.Code);

    66                 if (code.max_locals > 4)

    67                     throw new AssertionError("Too many locals for method arrMethod");

    68             }

    69         }

    70     }

    71 }

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