Mercurial > jdk8-mips64-public > hotspot / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/opto/live.hpp	Sat Dec 01 00:00:00 2007 +0000
     1.3 @@ -0,0 +1,74 @@
     1.4 +/*
     1.5 + * Copyright 1997-2005 Sun Microsystems, Inc.  All Rights Reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
    1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
    1.24 + * have any questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +class Block;
    1.29 +class LRG_List;
    1.30 +class PhaseCFG;
    1.31 +class VectorSet;
    1.32 +class IndexSet;
    1.33 +
    1.34 +//------------------------------PhaseLive--------------------------------------
    1.35 +// Compute live-in/live-out
    1.36 +class PhaseLive : public Phase {
    1.37 +  // Array of Sets of values live at the start of a block.
    1.38 +  // Indexed by block pre-order number.
    1.39 +  IndexSet *_live;
    1.40 +
    1.41 +  // Array of Sets of values defined locally in the block
    1.42 +  // Indexed by block pre-order number.
    1.43 +  IndexSet *_defs;
    1.44 +
    1.45 +  // Array of delta-set pointers, indexed by block pre-order number
    1.46 +  IndexSet **_deltas;
    1.47 +  IndexSet *_free_IndexSet;     // Free list of same
    1.48 +
    1.49 +  Block_List *_worklist;        // Worklist for iterative solution
    1.50 +
    1.51 +  const PhaseCFG &_cfg;         // Basic blocks
    1.52 +  LRG_List &_names;             // Mapping from Nodes to live ranges
    1.53 +  uint _maxlrg;                 // Largest live-range number
    1.54 +  Arena *_arena;
    1.55 +
    1.56 +  IndexSet *getset( Block *p );
    1.57 +  IndexSet *getfreeset( );
    1.58 +  void freeset( const Block *p );
    1.59 +  void add_liveout( Block *p, uint r, VectorSet &first_pass );
    1.60 +  void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass );
    1.61 +
    1.62 +public:
    1.63 +  PhaseLive( const PhaseCFG &cfg, LRG_List &names, Arena *arena );
    1.64 +  ~PhaseLive() {}
    1.65 +  // Compute liveness info
    1.66 +  void compute(uint maxlrg);
    1.67 +  // Reset arena storage
    1.68 +  void reset() { _live = NULL; }
    1.69 +
    1.70 +  // Return the live-out set for this block
    1.71 +  IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; }
    1.72 +
    1.73 +#ifndef PRODUCT
    1.74 +  void dump( const Block *b ) const;
    1.75 +  void stats(uint iters) const;
    1.76 +#endif
    1.77 +};