1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/opto/live.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,90 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_OPTO_LIVE_HPP
1.29 +#define SHARE_VM_OPTO_LIVE_HPP
1.30 +
1.31 +#include "libadt/port.hpp"
1.32 +#include "libadt/vectset.hpp"
1.33 +#include "opto/block.hpp"
1.34 +#include "opto/indexSet.hpp"
1.35 +#include "opto/phase.hpp"
1.36 +#include "opto/regmask.hpp"
1.37 +
1.38 +class Block;
1.39 +class PhaseCFG;
1.40 +class VectorSet;
1.41 +class IndexSet;
1.42 +
1.43 +//------------------------------LRG_List---------------------------------------
1.44 +// Map Node indices to Live RanGe indices.
1.45 +// Array lookup in the optimized case.
1.46 +typedef GrowableArray<uint> LRG_List;
1.47 +
1.48 +//------------------------------PhaseLive--------------------------------------
1.49 +// Compute live-in/live-out
1.50 +class PhaseLive : public Phase {
1.51 + // Array of Sets of values live at the start of a block.
1.52 + // Indexed by block pre-order number.
1.53 + IndexSet *_live;
1.54 +
1.55 + // Array of Sets of values defined locally in the block
1.56 + // Indexed by block pre-order number.
1.57 + IndexSet *_defs;
1.58 +
1.59 + // Array of delta-set pointers, indexed by block pre-order number
1.60 + IndexSet **_deltas;
1.61 + IndexSet *_free_IndexSet; // Free list of same
1.62 +
1.63 + Block_List *_worklist; // Worklist for iterative solution
1.64 +
1.65 + const PhaseCFG &_cfg; // Basic blocks
1.66 + const LRG_List &_names; // Mapping from Nodes to live ranges
1.67 + uint _maxlrg; // Largest live-range number
1.68 + Arena *_arena;
1.69 +
1.70 + IndexSet *getset( Block *p );
1.71 + IndexSet *getfreeset( );
1.72 + void freeset( const Block *p );
1.73 + void add_liveout( Block *p, uint r, VectorSet &first_pass );
1.74 + void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass );
1.75 +
1.76 +public:
1.77 + PhaseLive(const PhaseCFG &cfg, const LRG_List &names, Arena *arena);
1.78 + ~PhaseLive() {}
1.79 + // Compute liveness info
1.80 + void compute(uint maxlrg);
1.81 + // Reset arena storage
1.82 + void reset() { _live = NULL; }
1.83 +
1.84 + // Return the live-out set for this block
1.85 + IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; }
1.86 +
1.87 +#ifndef PRODUCT
1.88 + void dump( const Block *b ) const;
1.89 + void stats(uint iters) const;
1.90 +#endif
1.91 +};
1.92 +
1.93 +#endif // SHARE_VM_OPTO_LIVE_HPP
