1 /*
2 * Copyright (c) 1998, 2006, 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 */
24
25 class ciMethod;
26
27 class MethodLivenessResult : public BitMap {
28 private:
29 bool _is_valid;
30
31 public:
32 MethodLivenessResult(BitMap::bm_word_t* map, idx_t size_in_bits)
33 : BitMap(map, size_in_bits)
34 , _is_valid(false)
35 {}
36
37 MethodLivenessResult(idx_t size_in_bits)
38 : BitMap(size_in_bits)
39 , _is_valid(false)
40 {}
41
42 void set_is_valid() { _is_valid = true; }
43 bool is_valid() { return _is_valid; }
44 };
252 static long _total_visits;
253
254 #endif
255
256 public:
257 // Create a liveness analyzer for a method
258 MethodLiveness(Arena* arena, ciMethod* method);
259
260 // Compute liveness information for the method
261 void compute_liveness();
262
263 // Find out which locals are live at a specific bci.
264 MethodLivenessResult get_liveness_at(int bci);
265
266 #ifdef COMPILER1
267 const BitMap get_bci_block_start() const { return _bci_block_start; }
268 #endif // COMPILER1
269
270 static void print_times() PRODUCT_RETURN;
271 };
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1 /*
2 * Copyright (c) 1998, 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 */
24
25 #ifndef SHARE_VM_COMPILER_METHODLIVENESS_HPP
26 #define SHARE_VM_COMPILER_METHODLIVENESS_HPP
27
28 #include "utilities/bitMap.hpp"
29 #include "utilities/growableArray.hpp"
30
31 class ciMethod;
32
33 class MethodLivenessResult : public BitMap {
34 private:
35 bool _is_valid;
36
37 public:
38 MethodLivenessResult(BitMap::bm_word_t* map, idx_t size_in_bits)
39 : BitMap(map, size_in_bits)
40 , _is_valid(false)
41 {}
42
43 MethodLivenessResult(idx_t size_in_bits)
44 : BitMap(size_in_bits)
45 , _is_valid(false)
46 {}
47
48 void set_is_valid() { _is_valid = true; }
49 bool is_valid() { return _is_valid; }
50 };
258 static long _total_visits;
259
260 #endif
261
262 public:
263 // Create a liveness analyzer for a method
264 MethodLiveness(Arena* arena, ciMethod* method);
265
266 // Compute liveness information for the method
267 void compute_liveness();
268
269 // Find out which locals are live at a specific bci.
270 MethodLivenessResult get_liveness_at(int bci);
271
272 #ifdef COMPILER1
273 const BitMap get_bci_block_start() const { return _bci_block_start; }
274 #endif // COMPILER1
275
276 static void print_times() PRODUCT_RETURN;
277 };
278
279 #endif // SHARE_VM_COMPILER_METHODLIVENESS_HPP
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