Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/shared/liveRange.hpp @ 1941:79d04223b8a5
Added caching for resolved types and resolved fields.
This is crucial, because the local load elimination will lead to wrong results, if field equality (of two RiField objects with the same object and the same RiType) is not given. The caching makes sure that the default equals implementation is sufficient.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
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date | Tue, 28 Dec 2010 18:33:26 +0100 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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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 // This is a shared helper class used during phase 3 and 4 to move all the objects | |
26 // Dead regions in a Space are linked together to keep track of the live regions | |
27 // so that the live data can be traversed quickly without having to look at each | |
28 // object. | |
29 | |
30 class LiveRange: public MemRegion { | |
31 public: | |
32 LiveRange(HeapWord* bottom, HeapWord* top): MemRegion(bottom, top) {} | |
33 | |
34 void set_end(HeapWord* e) { | |
35 assert(e >= start(), "should be a non-zero range"); | |
36 MemRegion::set_end(e); | |
37 } | |
38 void set_word_size(size_t ws) { | |
39 assert(ws >= 0, "should be a non-zero range"); | |
40 MemRegion::set_word_size(ws); | |
41 } | |
42 | |
43 LiveRange * next() { return (LiveRange *) end(); } | |
44 | |
45 void move_to(HeapWord* destination) { | |
46 Copy::aligned_conjoint_words(start(), destination, word_size()); | |
47 } | |
48 }; |