8155241: Crash with assert in Xcomp mode and with disabled ReduceBulkZeroing
Summary: We should not assume that a CloneBasic arraycopy sets array initialization to complete.
Reviewed-by: kvn, roland
--- a/hotspot/src/share/vm/opto/memnode.cpp Thu May 12 08:23:25 2016 +0200
+++ b/hotspot/src/share/vm/opto/memnode.cpp Thu May 12 08:25:42 2016 +0200
@@ -502,7 +502,7 @@
if (ac->is_clonebasic()) {
intptr_t offset;
AllocateNode* alloc = AllocateNode::Ideal_allocation(ac->in(ArrayCopyNode::Dest), phase, offset);
- assert(alloc != NULL && alloc->initialization()->is_complete_with_arraycopy(), "broken allocation");
+ assert(alloc != NULL && (!ReduceBulkZeroing || alloc->initialization()->is_complete_with_arraycopy()), "broken allocation");
if (alloc == ld_alloc) {
return ac;
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/arraycopy/TestReduceBulkZeroingDisabled.java Thu May 12 08:25:42 2016 +0200
@@ -0,0 +1,36 @@
+/*
+ * 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 8155241
+ * @summary Test arraycopy elimination with ReduceBulkZeroing disabled.
+ * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -Xcomp -XX:-ReduceBulkZeroing TestReduceBulkZeroingDisabled
+ */
+public class TestReduceBulkZeroingDisabled {
+
+ static public void main(String[] args) {
+ System.out.println("Passed");
+ }
+}
+