Mercurial > hg > truffle
annotate src/share/vm/opto/coalesce.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
author | johnc |
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date | Wed, 18 Aug 2010 10:59:06 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2003, Oracle and/or its affiliates. All rights reserved. |
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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 | |
25 class LoopTree; | |
26 class LRG; | |
27 class LRG_List; | |
28 class Matcher; | |
29 class PhaseIFG; | |
30 class PhaseCFG; | |
31 | |
32 //------------------------------PhaseCoalesce---------------------------------- | |
33 class PhaseCoalesce : public Phase { | |
34 protected: | |
35 PhaseChaitin &_phc; | |
36 | |
37 public: | |
38 // Coalesce copies | |
39 PhaseCoalesce( PhaseChaitin &chaitin ) : Phase(Coalesce), _phc(chaitin) { } | |
40 | |
41 virtual void verify() = 0; | |
42 | |
43 // Coalesce copies | |
44 void coalesce_driver( ); | |
45 | |
46 // Coalesce copies in this block | |
47 virtual void coalesce( Block *b ) = 0; | |
48 | |
49 // Attempt to coalesce live ranges defined by these 2 | |
50 void combine_these_two( Node *n1, Node *n2 ); | |
51 | |
52 LRG &lrgs( uint lidx ) { return _phc.lrgs(lidx); } | |
53 #ifndef PRODUCT | |
54 // Dump internally name | |
55 void dump( Node *n ) const; | |
56 // Dump whole shebang | |
57 void dump() const; | |
58 #endif | |
59 }; | |
60 | |
61 //------------------------------PhaseAggressiveCoalesce------------------------ | |
62 // Aggressively, pessimistic coalesce copies. Aggressive means ignore graph | |
63 // colorability; perhaps coalescing to the point of forcing a spill. | |
64 // Pessimistic means we cannot coalesce if 2 live ranges interfere. This | |
65 // implies we do not hit a fixed point right away. | |
66 class PhaseAggressiveCoalesce : public PhaseCoalesce { | |
67 uint _unique; | |
68 public: | |
69 // Coalesce copies | |
70 PhaseAggressiveCoalesce( PhaseChaitin &chaitin ) : PhaseCoalesce(chaitin) {} | |
71 | |
72 virtual void verify() { }; | |
73 | |
74 // Aggressively coalesce copies in this block | |
75 virtual void coalesce( Block *b ); | |
76 | |
77 // Where I fail to coalesce, manifest virtual copies as the Real Thing | |
78 void insert_copies( Matcher &matcher ); | |
79 | |
80 // Copy insertion needs some smarts in case live ranges overlap | |
81 void insert_copy_with_overlap( Block *b, Node *copy, uint dst_name, uint src_name ); | |
82 }; | |
83 | |
84 | |
85 //------------------------------PhaseConservativeCoalesce---------------------- | |
86 // Conservatively, pessimistic coalesce copies. Conservative means do not | |
87 // coalesce if the resultant live range will be uncolorable. Pessimistic | |
88 // means we cannot coalesce if 2 live ranges interfere. This implies we do | |
89 // not hit a fixed point right away. | |
90 class PhaseConservativeCoalesce : public PhaseCoalesce { | |
91 IndexSet _ulr; // Union live range interferences | |
92 public: | |
93 // Coalesce copies | |
94 PhaseConservativeCoalesce( PhaseChaitin &chaitin ); | |
95 | |
96 virtual void verify(); | |
97 | |
98 // Conservatively coalesce copies in this block | |
99 virtual void coalesce( Block *b ); | |
100 | |
101 // Coalesce this chain of copies away | |
102 bool copy_copy( Node *dst_copy, Node *src_copy, Block *b, uint bindex ); | |
103 | |
104 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 ); | |
105 | |
106 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); | |
107 | |
108 void update_ifg(uint lr1, uint lr2, IndexSet *n_lr1, IndexSet *n_lr2); | |
109 }; |