OpenJDK / amber / amber
changeset 36312:a18280a1534d
Merge
author | roland |
---|---|
date | Tue, 23 Feb 2016 10:22:56 +0000 |
parents | bcc01156b370 635900f4df95 |
children | e7eff81d7f1d |
files | |
diffstat | 1 files changed, 91 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/test/compiler/c2/TestDominatingDeadCheckCast.java Tue Feb 23 10:22:56 2016 +0000 @@ -0,0 +1,91 @@ +/* + * Copyright (c) 2016, 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 8149797 + * @summary node replaced by dominating dead cast during parsing + * @run main/othervm -XX:-UseOnStackReplacement -XX:-BackgroundCompilation -XX:TypeProfileLevel=200 -XX:CompileCommand=dontinline,TestDominatingDeadCheckCast::not_inlined TestDominatingDeadCheckCast + * + */ + +public class TestDominatingDeadCheckCast { + + static class A { + int f; + } + + static class B extends A { + } + + static A not_inlined() { + return new A(); + } + + static void inlined(A param) { + param.f = 42; + } + + static A field; + + static void test(boolean flag1, boolean flag2, boolean flag3, boolean flag4, boolean flag5) { + // Go through memory rather than through a local to defeat C2's replace_in_map + field = not_inlined(); + // Speculation adds a CheckCast on entry of this inlined + // method for the parameter + inlined(field); + // Walk up the dominators is depth limited, make the CheckCast + // above unreachable from the last inlined call + if (flag1) { + if (flag2) { + if (flag3) { + // Speculation adds a CheckCast on entry of this + // inlined method for the parameter. This + // CheckCast is replaced by the CheckCast of the + // first inlined method call but the replaced + // CheckCast is still around during parsing. + inlined(field); + // Same as above, some useless control + if (flag4) { + if (flag5) { + // Speculation adds a CheckCast on entry + // of this inlined method for the + // parameter. This CheckCast is replaced + // by the dead CheckCast of the previous + // inlined() call. + inlined(field); + } + } + } + } + } + } + + static public void main(String[] args) { + field = new A(); + for (int i = 0; i < 20000; i++) { + test(true, true, true, true, true); + } + } +}