diff --git a/.hgtags b/.hgtags index 69255a9e542e5464a18e7226731428477ce7987d..f0cb0c6b42baaf7ad375a5001910a218a1033708 100644 --- a/.hgtags +++ b/.hgtags @@ -956,5 +956,9 @@ ef90c721a4e59b01ca36f25619010a1afe9ed4d5 jdk8u131-b02 dab1d597165207e14b6886b1823c1e990bc776a3 jdk8u131-b04 c965fc1aa840a0903709ad69aa0e2100330ccd84 jdk8u131-b05 6e4cfbc7534f83902692132efb61683528c04a59 jdk8u131-b06 +5b3cb4fbdbc7bdeb7c78a8703c3084ce068f6691 jdk8u131-b07 +db221c0a423e776bec5c3198d11d3f26827bd786 jdk8u131-b08 +56e71d16083904ceddfdd1d66312582a42781646 jdk8u131-b09 +1da23ae49386608550596502d90a381ee6c1dfaa jdk8u131-b10 692bc6b674dcab72453de08ee9da0856a7e41c0f jdk8u141-b00 2d5100bddeb80cf767485b787fc3051311e3d7b9 jdk8u151-b00 diff --git a/src/os/windows/vm/os_windows.cpp b/src/os/windows/vm/os_windows.cpp index e329c9fd6cd65e8e0d7c24b9885960b4206a33f5..44d89a2885e24b2d850aebed19c57a8f628ba826 100644 --- a/src/os/windows/vm/os_windows.cpp +++ b/src/os/windows/vm/os_windows.cpp @@ -1,5 +1,5 @@ /* - * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 1997, 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 @@ -1747,8 +1747,7 @@ void os::win32::print_windows_version(outputStream* st) { if (is_workstation) { st->print("10"); } else { - // The server version name of Windows 10 is not known at this time - st->print("%d.%d", major_version, minor_version); + st->print("Server 2016"); } break; diff --git a/src/share/vm/opto/loopnode.cpp b/src/share/vm/opto/loopnode.cpp index e653557745473b6dc14410ca0b1f1ffb5e5ff718..8f2f22815177323ec2a18f9df5d57c464a929e70 100644 --- a/src/share/vm/opto/loopnode.cpp +++ b/src/share/vm/opto/loopnode.cpp @@ -278,8 +278,16 @@ bool PhaseIdealLoop::is_counted_loop( Node *x, IdealLoopTree *loop ) { return false; // Allow funny placement of Safepoint - if (back_control->Opcode() == Op_SafePoint) + if (back_control->Opcode() == Op_SafePoint) { + if (UseCountedLoopSafepoints) { + // Leaving the safepoint on the backedge and creating a + // CountedLoop will confuse optimizations. We can't move the + // safepoint around because its jvm state wouldn't match a new + // location. Give up on that loop. + return false; + } back_control = back_control->in(TypeFunc::Control); + } // Controlling test for loop Node *iftrue = back_control; diff --git a/test/compiler/loopopts/TestCountedLoopSafepointBackedge.java b/test/compiler/loopopts/TestCountedLoopSafepointBackedge.java new file mode 100644 index 0000000000000000000000000000000000000000..d5709675aa96528bae4a1dec162294094b306778 --- /dev/null +++ b/test/compiler/loopopts/TestCountedLoopSafepointBackedge.java @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2016, Red Hat, Inc. 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 8161147 + * @summary Safepoint on backedge breaks UseCountedLoopSafepoints + * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:+UseCountedLoopSafepoints TestCountedLoopSafepointBackedge + * + */ + +public class TestCountedLoopSafepointBackedge { + static void test(int[] arr, int inc) { + int i = 0; + for (;;) { + for (int j = 0; j < 10; j++); + arr[i] = i; + i++; + if (i >= 100) { + break; + } + for (int j = 0; j < 10; j++); + } + } + + static public void main(String[] args) { + int[] arr = new int[100]; + for (int i = 0; i < 20000; i++) { + test(arr, 1); + } + } +}