Mercurial > hg > truffle
annotate src/share/vm/opto/c2compiler.hpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
| author | Bernhard Urban <bernhard.urban@jku.at> |
|---|---|
| date | Mon, 15 Apr 2013 19:54:58 +0200 |
| parents | 5d0bb7d52783 |
| children | 096c224171c4 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
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20 * or visit www.oracle.com if you need additional information or have any |
|
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_OPTO_C2COMPILER_HPP |
| 26 #define SHARE_VM_OPTO_C2COMPILER_HPP | |
| 27 | |
| 28 #include "compiler/abstractCompiler.hpp" | |
| 29 | |
| 0 | 30 class C2Compiler : public AbstractCompiler { |
| 31 private: | |
| 32 | |
| 33 static void initialize_runtime(); | |
| 34 | |
| 35 public: | |
|
7154
5d0bb7d52783
changes to support Graal co-existing with the other HotSpot compiler(s) and being used for explicit compilation requests and code installation via the Graal API
Doug Simon <doug.simon@oracle.com>
parents:
1972
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36 C2Compiler() : AbstractCompiler(c2) {} |
|
5d0bb7d52783
changes to support Graal co-existing with the other HotSpot compiler(s) and being used for explicit compilation requests and code installation via the Graal API
Doug Simon <doug.simon@oracle.com>
parents:
1972
diff
changeset
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37 |
| 0 | 38 // Name |
| 39 const char *name() { return "C2"; } | |
| 40 | |
| 41 static volatile int _runtimes; | |
| 42 | |
| 43 #ifdef TIERED | |
| 44 virtual bool is_c2() { return true; }; | |
| 45 #endif // TIERED | |
| 46 | |
| 47 // Customization | |
| 48 bool needs_adapters () { return true; } | |
| 49 bool needs_stubs () { return true; } | |
| 50 | |
| 51 void initialize(); | |
| 52 | |
| 53 // Compilation entry point for methods | |
| 54 void compile_method(ciEnv* env, | |
| 55 ciMethod* target, | |
| 56 int entry_bci); | |
| 57 | |
| 58 // sentinel value used to trigger backtracking in compile_method(). | |
| 59 static const char* retry_no_subsuming_loads(); | |
|
38
b789bcaf2dd9
6667610: (Escape Analysis) retry compilation without EA if it fails
kvn
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60 static const char* retry_no_escape_analysis(); |
| 0 | 61 |
| 62 // Print compilation timers and statistics | |
| 63 void print_timers(); | |
| 64 }; | |
| 1972 | 65 |
| 66 #endif // SHARE_VM_OPTO_C2COMPILER_HPP |