| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_OPTO_LIVE_HPP |
| #define SHARE_VM_OPTO_LIVE_HPP |
| |
| #include "libadt/vectset.hpp" |
| #include "opto/block.hpp" |
| #include "opto/indexSet.hpp" |
| #include "opto/phase.hpp" |
| #include "opto/regmask.hpp" |
| |
| class Block; |
| class PhaseCFG; |
| class VectorSet; |
| class IndexSet; |
| |
| //------------------------------LRG_List--------------------------------------- |
| // Map Node indices to Live RanGe indices. |
| // Array lookup in the optimized case. |
| typedef GrowableArray<uint> LRG_List; |
| |
| //------------------------------PhaseLive-------------------------------------- |
| // Compute live-in/live-out |
| class PhaseLive : public Phase { |
| // Array of Sets of values live at the start of a block. |
| // Indexed by block pre-order number. |
| IndexSet *_live; // live out |
| IndexSet *_livein; // live in |
| |
| // Array of Sets of values defined locally in the block |
| // Indexed by block pre-order number. |
| IndexSet *_defs; |
| |
| // Array of delta-set pointers, indexed by block pre-order number |
| IndexSet **_deltas; |
| IndexSet *_free_IndexSet; // Free list of same |
| |
| Block_List *_worklist; // Worklist for iterative solution |
| |
| const PhaseCFG &_cfg; // Basic blocks |
| const LRG_List &_names; // Mapping from Nodes to live ranges |
| uint _maxlrg; // Largest live-range number |
| Arena *_arena; |
| bool _keep_deltas; // Retain live in information |
| |
| IndexSet *getset( Block *p ); |
| IndexSet *getfreeset( ); |
| void freeset( Block *p ); |
| void add_liveout( Block *p, uint r, VectorSet &first_pass ); |
| void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass ); |
| void add_livein( Block *p, IndexSet *lo ); |
| |
| public: |
| PhaseLive(const PhaseCFG &cfg, const LRG_List &names, Arena *arena, bool keep_deltas); |
| ~PhaseLive() {} |
| // Compute liveness info |
| void compute(uint maxlrg); |
| // Reset arena storage |
| void reset() { _live = NULL; } |
| |
| // Return the live-out set for this block |
| IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; } |
| IndexSet *livein( const Block * b ) { return &_livein[b->_pre_order - 1]; } |
| |
| #ifndef PRODUCT |
| void dump( const Block *b ) const; |
| void stats(uint iters) const; |
| #endif |
| }; |
| |
| #endif // SHARE_VM_OPTO_LIVE_HPP |