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
1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_OPTO_C2COMPILER_HPP
26 #define SHARE_VM_OPTO_C2COMPILER_HPP
28 #include "compiler/abstractCompiler.hpp"
30 class C2Compiler : public AbstractCompiler {
31 private:
33 static void initialize_runtime();
35 public:
36 // Name
37 const char *name() { return "C2"; }
39 static volatile int _runtimes;
41 #ifdef TIERED
42 virtual bool is_c2() { return true; };
43 #endif // TIERED
45 // Customization
46 bool needs_adapters () { return true; }
47 bool needs_stubs () { return true; }
49 void initialize();
51 // Compilation entry point for methods
52 void compile_method(ciEnv* env,
53 ciMethod* target,
54 int entry_bci);
56 // sentinel value used to trigger backtracking in compile_method().
57 static const char* retry_no_subsuming_loads();
58 static const char* retry_no_escape_analysis();
60 // Print compilation timers and statistics
61 void print_timers();
62 };
64 #endif // SHARE_VM_OPTO_C2COMPILER_HPP