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comparison: src/share/vm/opto/live.hpp
src/share/vm/opto/live.hpp
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| 1 /* | |
| 2 * Copyright (c) 1997, 2013, 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_OPTO_LIVE_HPP | |
| 26 #define SHARE_VM_OPTO_LIVE_HPP | |
| 27 | |
| 28 #include "libadt/port.hpp" | |
| 29 #include "libadt/vectset.hpp" | |
| 30 #include "opto/block.hpp" | |
| 31 #include "opto/indexSet.hpp" | |
| 32 #include "opto/phase.hpp" | |
| 33 #include "opto/regmask.hpp" | |
| 34 | |
| 35 class Block; | |
| 36 class PhaseCFG; | |
| 37 class VectorSet; | |
| 38 class IndexSet; | |
| 39 | |
| 40 //------------------------------LRG_List--------------------------------------- | |
| 41 // Map Node indices to Live RanGe indices. | |
| 42 // Array lookup in the optimized case. | |
| 43 typedef GrowableArray<uint> LRG_List; | |
| 44 | |
| 45 //------------------------------PhaseLive-------------------------------------- | |
| 46 // Compute live-in/live-out | |
| 47 class PhaseLive : public Phase { | |
| 48 // Array of Sets of values live at the start of a block. | |
| 49 // Indexed by block pre-order number. | |
| 50 IndexSet *_live; | |
| 51 | |
| 52 // Array of Sets of values defined locally in the block | |
| 53 // Indexed by block pre-order number. | |
| 54 IndexSet *_defs; | |
| 55 | |
| 56 // Array of delta-set pointers, indexed by block pre-order number | |
| 57 IndexSet **_deltas; | |
| 58 IndexSet *_free_IndexSet; // Free list of same | |
| 59 | |
| 60 Block_List *_worklist; // Worklist for iterative solution | |
| 61 | |
| 62 const PhaseCFG &_cfg; // Basic blocks | |
| 63 const LRG_List &_names; // Mapping from Nodes to live ranges | |
| 64 uint _maxlrg; // Largest live-range number | |
| 65 Arena *_arena; | |
| 66 | |
| 67 IndexSet *getset( Block *p ); | |
| 68 IndexSet *getfreeset( ); | |
| 69 void freeset( const Block *p ); | |
| 70 void add_liveout( Block *p, uint r, VectorSet &first_pass ); | |
| 71 void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass ); | |
| 72 | |
| 73 public: | |
| 74 PhaseLive(const PhaseCFG &cfg, const LRG_List &names, Arena *arena); | |
| 75 ~PhaseLive() {} | |
| 76 // Compute liveness info | |
| 77 void compute(uint maxlrg); | |
| 78 // Reset arena storage | |
| 79 void reset() { _live = NULL; } | |
| 80 | |
| 81 // Return the live-out set for this block | |
| 82 IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; } | |
| 83 | |
| 84 #ifndef PRODUCT | |
| 85 void dump( const Block *b ) const; | |
| 86 void stats(uint iters) const; | |
| 87 #endif | |
| 88 }; | |
| 89 | |
| 90 #endif // SHARE_VM_OPTO_LIVE_HPP |
