Mercurial > hg > graal-compiler
diff test/compiler/codegen/C1NullCheckOfNullStore.java @ 17831:876390ee9b6f
8039043: Implicit null check is in the wrong place in C1 -UseCompressedOops
Summary: Null check is placed in a wrong place when storing a null to an object field on x64 with compressed oops off
Reviewed-by: roland, vlivanov, kvn
author | iveresov |
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date | Wed, 02 Apr 2014 11:24:51 -0700 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/codegen/C1NullCheckOfNullStore.java Wed Apr 02 11:24:51 2014 -0700 @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2014, 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 8039043 + * @summary Null check is placed in a wrong place when storing a null to an object field on x64 with compressed oops off + * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:CompileCommand=compileonly,C1NullCheckOfNullStore::test -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:-UseCompressedOops C1NullCheckOfNullStore + * + */ + +public class C1NullCheckOfNullStore { + private static class Foo { + Object bar; + } + static private void test(Foo x) { + x.bar = null; + } + static public void main(String args[]) { + Foo x = new Foo(); + for (int i = 0; i < 10000; i++) { + test(x); + } + boolean gotNPE = false; + try { + for (int i = 0; i < 10000; i++) { + test(null); + } + } + catch(NullPointerException e) { + gotNPE = true; + } + if (!gotNPE) { + throw new Error("Expecting a NullPointerException"); + } + } +}