Mon, 26 Sep 2011 10:24:05 -0700
7081933: Use zeroing elimination optimization for large array
Summary: Don't zero new typeArray during runtime call if the allocation is followed by arraycopy into it.
Reviewed-by: twisti
duke@435 | 1 | /* |
stefank@2314 | 2 | * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
trims@1907 | 21 | * questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
stefank@2314 | 25 | #include "precompiled.hpp" |
stefank@2314 | 26 | #include "runtime/deoptimization.hpp" |
stefank@2314 | 27 | #include "runtime/frame.inline.hpp" |
stefank@2314 | 28 | #include "runtime/stubRoutines.hpp" |
stefank@2314 | 29 | #ifdef TARGET_OS_FAMILY_linux |
stefank@2314 | 30 | # include "thread_linux.inline.hpp" |
stefank@2314 | 31 | #endif |
stefank@2314 | 32 | #ifdef TARGET_OS_FAMILY_solaris |
stefank@2314 | 33 | # include "thread_solaris.inline.hpp" |
stefank@2314 | 34 | #endif |
duke@435 | 35 | |
duke@435 | 36 | // Implementation of the platform-specific part of StubRoutines - for |
duke@435 | 37 | // a description of how to extend it, see the stubRoutines.hpp file. |
duke@435 | 38 | |
duke@435 | 39 | |
duke@435 | 40 | extern "C" { |
duke@435 | 41 | address _flush_reg_windows(); // in .s file. |
duke@435 | 42 | // Flush registers to stack. In case of error we will need to stack walk. |
duke@435 | 43 | address bootstrap_flush_windows(void) { |
duke@435 | 44 | Thread* thread = ThreadLocalStorage::get_thread_slow(); |
duke@435 | 45 | // Very early in process there is no thread. |
duke@435 | 46 | if (thread != NULL) { |
duke@435 | 47 | guarantee(thread->is_Java_thread(), "Not a Java thread."); |
duke@435 | 48 | JavaThread* jt = (JavaThread*)thread; |
duke@435 | 49 | guarantee(!jt->has_last_Java_frame(), "Must be able to flush registers!"); |
duke@435 | 50 | } |
duke@435 | 51 | return (address)_flush_reg_windows(); |
duke@435 | 52 | }; |
duke@435 | 53 | }; |
duke@435 | 54 | |
duke@435 | 55 | address StubRoutines::Sparc::_test_stop_entry = NULL; |
duke@435 | 56 | address StubRoutines::Sparc::_stop_subroutine_entry = NULL; |
duke@435 | 57 | address StubRoutines::Sparc::_flush_callers_register_windows_entry = CAST_FROM_FN_PTR(address, bootstrap_flush_windows); |
duke@435 | 58 | |
duke@435 | 59 | address StubRoutines::Sparc::_partial_subtype_check = NULL; |
duke@435 | 60 | |
duke@435 | 61 | int StubRoutines::Sparc::_atomic_memory_operation_lock = StubRoutines::Sparc::unlocked; |
duke@435 | 62 | |
duke@435 | 63 | int StubRoutines::Sparc::_v8_oop_lock_cache[StubRoutines::Sparc::nof_v8_oop_lock_cache_entries]; |