Mercurial > hg > truffle
annotate src/share/vm/opto/live.hpp @ 1689:f4f596978298
Merge
author | never |
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date | Mon, 09 Aug 2010 17:51:56 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 class Block; | |
26 class LRG_List; | |
27 class PhaseCFG; | |
28 class VectorSet; | |
29 class IndexSet; | |
30 | |
31 //------------------------------PhaseLive-------------------------------------- | |
32 // Compute live-in/live-out | |
33 class PhaseLive : public Phase { | |
34 // Array of Sets of values live at the start of a block. | |
35 // Indexed by block pre-order number. | |
36 IndexSet *_live; | |
37 | |
38 // Array of Sets of values defined locally in the block | |
39 // Indexed by block pre-order number. | |
40 IndexSet *_defs; | |
41 | |
42 // Array of delta-set pointers, indexed by block pre-order number | |
43 IndexSet **_deltas; | |
44 IndexSet *_free_IndexSet; // Free list of same | |
45 | |
46 Block_List *_worklist; // Worklist for iterative solution | |
47 | |
48 const PhaseCFG &_cfg; // Basic blocks | |
49 LRG_List &_names; // Mapping from Nodes to live ranges | |
50 uint _maxlrg; // Largest live-range number | |
51 Arena *_arena; | |
52 | |
53 IndexSet *getset( Block *p ); | |
54 IndexSet *getfreeset( ); | |
55 void freeset( const Block *p ); | |
56 void add_liveout( Block *p, uint r, VectorSet &first_pass ); | |
57 void add_liveout( Block *p, IndexSet *lo, VectorSet &first_pass ); | |
58 | |
59 public: | |
60 PhaseLive( const PhaseCFG &cfg, LRG_List &names, Arena *arena ); | |
61 ~PhaseLive() {} | |
62 // Compute liveness info | |
63 void compute(uint maxlrg); | |
64 // Reset arena storage | |
65 void reset() { _live = NULL; } | |
66 | |
67 // Return the live-out set for this block | |
68 IndexSet *live( const Block * b ) { return &_live[b->_pre_order-1]; } | |
69 | |
70 #ifndef PRODUCT | |
71 void dump( const Block *b ) const; | |
72 void stats(uint iters) const; | |
73 #endif | |
74 }; |