aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug 8009170
aoqi@0:  * @summary Regression: javac generates redundant bytecode in assignop involving
aoqi@0:  * arrays
aoqi@0:  * @run main RedundantByteCodeInArrayTest
aoqi@0:  */
aoqi@0: 
aoqi@0: import java.io.File;
aoqi@0: import java.io.IOException;
aoqi@0: 
aoqi@0: import com.sun.tools.classfile.Attribute;
aoqi@0: import com.sun.tools.classfile.ClassFile;
aoqi@0: import com.sun.tools.classfile.Code_attribute;
aoqi@0: import com.sun.tools.classfile.Code_attribute.InvalidIndex;
aoqi@0: import com.sun.tools.classfile.ConstantPool;
aoqi@0: import com.sun.tools.classfile.ConstantPoolException;
aoqi@0: import com.sun.tools.classfile.Descriptor.InvalidDescriptor;
aoqi@0: import com.sun.tools.classfile.Method;
aoqi@0: 
aoqi@0: public class RedundantByteCodeInArrayTest {
aoqi@0:     public static void main(String[] args)
aoqi@0:             throws IOException, ConstantPoolException, InvalidDescriptor, InvalidIndex {
aoqi@0:         new RedundantByteCodeInArrayTest()
aoqi@0:                 .checkClassFile(new File(System.getProperty("test.classes", "."),
aoqi@0:                     RedundantByteCodeInArrayTest.class.getName() + ".class"));
aoqi@0:     }
aoqi@0: 
aoqi@0:     void arrMethod(int[] array, int p, int inc) {
aoqi@0:         array[p] += inc;
aoqi@0:     }
aoqi@0: 
aoqi@0:     void checkClassFile(File file)
aoqi@0:             throws IOException, ConstantPoolException, InvalidDescriptor, InvalidIndex {
aoqi@0:         ClassFile classFile = ClassFile.read(file);
aoqi@0:         ConstantPool constantPool = classFile.constant_pool;
aoqi@0: 
aoqi@0:         //lets get all the methods in the class file.
aoqi@0:         for (Method method : classFile.methods) {
aoqi@0:             if (method.getName(constantPool).equals("arrMethod")) {
aoqi@0:                 Code_attribute code = (Code_attribute) method.attributes
aoqi@0:                         .get(Attribute.Code);
aoqi@0:                 if (code.max_locals > 4)
aoqi@0:                     throw new AssertionError("Too many locals for method arrMethod");
aoqi@0:             }
aoqi@0:         }
aoqi@0:     }
aoqi@0: }