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 ValueMapEntry: public CompilationResourceObj {
26 private:
27 intx _hash;
28 Value _value;
29 int _nesting;
30 ValueMapEntry* _next;
31
32 public:
33 ValueMapEntry(intx hash, Value value, int nesting, ValueMapEntry* next)
34 : _hash(hash)
35 , _value(value)
36 , _nesting(nesting)
37 , _next(next)
38 {
39 }
40
41 intx hash() { return _hash; }
42 Value value() { return _value; }
43 int nesting() { return _nesting; }
44 ValueMapEntry* next() { return _next; }
209
210 class GlobalValueNumbering: public ValueNumberingVisitor {
211 private:
212 ValueMap* _current_map; // value map of current block
213 ValueMapArray _value_maps; // list of value maps for all blocks
214
215 public:
216 // accessors
217 ValueMap* current_map() { return _current_map; }
218 ValueMap* value_map_of(BlockBegin* block) { return _value_maps.at(block->linear_scan_number()); }
219 void set_value_map_of(BlockBegin* block, ValueMap* map) { assert(value_map_of(block) == NULL, ""); _value_maps.at_put(block->linear_scan_number(), map); }
220
221 // implementation for abstract methods of ValueNumberingVisitor
222 void kill_memory() { current_map()->kill_memory(); }
223 void kill_field(ciField* field) { current_map()->kill_field(field); }
224 void kill_array(ValueType* type) { current_map()->kill_array(type); }
225
226 // main entry point that performs global value numbering
227 GlobalValueNumbering(IR* ir);
228 };
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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_C1_C1_VALUEMAP_HPP
26 #define SHARE_VM_C1_C1_VALUEMAP_HPP
27
28 #include "c1/c1_Instruction.hpp"
29 #include "c1/c1_ValueSet.hpp"
30 #include "memory/allocation.hpp"
31
32 class ValueMapEntry: public CompilationResourceObj {
33 private:
34 intx _hash;
35 Value _value;
36 int _nesting;
37 ValueMapEntry* _next;
38
39 public:
40 ValueMapEntry(intx hash, Value value, int nesting, ValueMapEntry* next)
41 : _hash(hash)
42 , _value(value)
43 , _nesting(nesting)
44 , _next(next)
45 {
46 }
47
48 intx hash() { return _hash; }
49 Value value() { return _value; }
50 int nesting() { return _nesting; }
51 ValueMapEntry* next() { return _next; }
216
217 class GlobalValueNumbering: public ValueNumberingVisitor {
218 private:
219 ValueMap* _current_map; // value map of current block
220 ValueMapArray _value_maps; // list of value maps for all blocks
221
222 public:
223 // accessors
224 ValueMap* current_map() { return _current_map; }
225 ValueMap* value_map_of(BlockBegin* block) { return _value_maps.at(block->linear_scan_number()); }
226 void set_value_map_of(BlockBegin* block, ValueMap* map) { assert(value_map_of(block) == NULL, ""); _value_maps.at_put(block->linear_scan_number(), map); }
227
228 // implementation for abstract methods of ValueNumberingVisitor
229 void kill_memory() { current_map()->kill_memory(); }
230 void kill_field(ciField* field) { current_map()->kill_field(field); }
231 void kill_array(ValueType* type) { current_map()->kill_array(type); }
232
233 // main entry point that performs global value numbering
234 GlobalValueNumbering(IR* ir);
235 };
236
237 #endif // SHARE_VM_C1_C1_VALUEMAP_HPP
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