Mercurial > hg > truffle
annotate src/share/vm/opto/coalesce.hpp @ 4710:41406797186b
7113012: G1: rename not-fully-young GCs as "mixed"
Summary: Renamed partially-young GCs as mixed and fully-young GCs as young. Change all external output that includes those terms (GC log and GC ergo log) as well as any comments, fields, methods, etc. The changeset also includes very minor code tidying up (added some curly brackets).
Reviewed-by: johnc, brutisso
| author | tonyp |
|---|---|
| date | Fri, 16 Dec 2011 02:14:27 -0500 |
| parents | f95d63e2154a |
| children | 8373c19be854 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, 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 |
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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 | |
| 1972 | 25 #ifndef SHARE_VM_OPTO_COALESCE_HPP |
| 26 #define SHARE_VM_OPTO_COALESCE_HPP | |
| 27 | |
| 28 #include "opto/phase.hpp" | |
| 29 | |
| 0 | 30 class LoopTree; |
| 31 class LRG; | |
| 32 class LRG_List; | |
| 33 class Matcher; | |
| 34 class PhaseIFG; | |
| 35 class PhaseCFG; | |
| 36 | |
| 37 //------------------------------PhaseCoalesce---------------------------------- | |
| 38 class PhaseCoalesce : public Phase { | |
| 39 protected: | |
| 40 PhaseChaitin &_phc; | |
| 41 | |
| 42 public: | |
| 43 // Coalesce copies | |
| 44 PhaseCoalesce( PhaseChaitin &chaitin ) : Phase(Coalesce), _phc(chaitin) { } | |
| 45 | |
| 46 virtual void verify() = 0; | |
| 47 | |
| 48 // Coalesce copies | |
| 49 void coalesce_driver( ); | |
| 50 | |
| 51 // Coalesce copies in this block | |
| 52 virtual void coalesce( Block *b ) = 0; | |
| 53 | |
| 54 // Attempt to coalesce live ranges defined by these 2 | |
| 55 void combine_these_two( Node *n1, Node *n2 ); | |
| 56 | |
| 57 LRG &lrgs( uint lidx ) { return _phc.lrgs(lidx); } | |
| 58 #ifndef PRODUCT | |
| 59 // Dump internally name | |
| 60 void dump( Node *n ) const; | |
| 61 // Dump whole shebang | |
| 62 void dump() const; | |
| 63 #endif | |
| 64 }; | |
| 65 | |
| 66 //------------------------------PhaseAggressiveCoalesce------------------------ | |
| 67 // Aggressively, pessimistic coalesce copies. Aggressive means ignore graph | |
| 68 // colorability; perhaps coalescing to the point of forcing a spill. | |
| 69 // Pessimistic means we cannot coalesce if 2 live ranges interfere. This | |
| 70 // implies we do not hit a fixed point right away. | |
| 71 class PhaseAggressiveCoalesce : public PhaseCoalesce { | |
| 72 uint _unique; | |
| 73 public: | |
| 74 // Coalesce copies | |
| 75 PhaseAggressiveCoalesce( PhaseChaitin &chaitin ) : PhaseCoalesce(chaitin) {} | |
| 76 | |
| 77 virtual void verify() { }; | |
| 78 | |
| 79 // Aggressively coalesce copies in this block | |
| 80 virtual void coalesce( Block *b ); | |
| 81 | |
| 82 // Where I fail to coalesce, manifest virtual copies as the Real Thing | |
| 83 void insert_copies( Matcher &matcher ); | |
| 84 | |
| 85 // Copy insertion needs some smarts in case live ranges overlap | |
| 86 void insert_copy_with_overlap( Block *b, Node *copy, uint dst_name, uint src_name ); | |
| 87 }; | |
| 88 | |
| 89 | |
| 90 //------------------------------PhaseConservativeCoalesce---------------------- | |
| 91 // Conservatively, pessimistic coalesce copies. Conservative means do not | |
| 92 // coalesce if the resultant live range will be uncolorable. Pessimistic | |
| 93 // means we cannot coalesce if 2 live ranges interfere. This implies we do | |
| 94 // not hit a fixed point right away. | |
| 95 class PhaseConservativeCoalesce : public PhaseCoalesce { | |
| 96 IndexSet _ulr; // Union live range interferences | |
| 97 public: | |
| 98 // Coalesce copies | |
| 99 PhaseConservativeCoalesce( PhaseChaitin &chaitin ); | |
| 100 | |
| 101 virtual void verify(); | |
| 102 | |
| 103 // Conservatively coalesce copies in this block | |
| 104 virtual void coalesce( Block *b ); | |
| 105 | |
| 106 // Coalesce this chain of copies away | |
| 107 bool copy_copy( Node *dst_copy, Node *src_copy, Block *b, uint bindex ); | |
| 108 | |
| 109 void union_helper( Node *lr1_node, Node *lr2_node, uint lr1, uint lr2, Node *src_def, Node *dst_copy, Node *src_copy, Block *b, uint bindex ); | |
| 110 | |
| 111 uint compute_separating_interferences(Node *dst_copy, Node *src_copy, Block *b, uint bindex, RegMask &rm, uint rm_size, uint reg_degree, uint lr1, uint lr2); | |
| 112 | |
| 113 void update_ifg(uint lr1, uint lr2, IndexSet *n_lr1, IndexSet *n_lr2); | |
| 114 }; | |
| 1972 | 115 |
| 116 #endif // SHARE_VM_OPTO_COALESCE_HPP |