hotspot/test/compiler/codegen/C1NullCheckOfNullStore.java
author chegar
Tue, 22 Mar 2016 15:26:07 +0000
changeset 36694 182a5e7a519e
parent 23530 b0fb0c2df62b
child 40059 c2304140ed64
permissions -rw-r--r--
Merge
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/*
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 * Copyright (c) 2014, 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 8039043
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 * @summary Null check is placed in a wrong place when storing a null to an object field on x64 with compressed oops off
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 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CompileCommand=compileonly,C1NullCheckOfNullStore::test -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:-UseCompressedOops C1NullCheckOfNullStore
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 *
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 */
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public class C1NullCheckOfNullStore {
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  private static class Foo {
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    Object bar;
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  }
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  static private void test(Foo x) {
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    x.bar = null;
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  }
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  static public void main(String args[]) {
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    Foo x = new Foo();
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    for (int i = 0; i < 10000; i++) {
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      test(x);
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    }
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    boolean gotNPE = false;
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    try {
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      for (int i = 0; i < 10000; i++) {
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        test(null);
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      }
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    }
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    catch(NullPointerException e) {
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      gotNPE = true;
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    }
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    if (!gotNPE) {
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      throw new Error("Expecting a NullPointerException");
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    }
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  }
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}