Mercurial > hg > graal-compiler
comparison src/share/vm/gc_implementation/g1/heapRegion.cpp @ 20542:0fcaab91d485
8055816: Remove dead code in g1BlockOffsetTable
Reviewed-by: tschatzl, mgerdin
| author | brutisso |
|---|---|
| date | Fri, 10 Oct 2014 15:45:45 +0200 |
| parents | 7baf47cb97cb |
| children | e8bf410d5e23 |
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| 20541:e3ed86fc15ed | 20542:0fcaab91d485 |
|---|---|
| 300 if (res == current) { | 300 if (res == current) { |
| 301 return true; | 301 return true; |
| 302 } | 302 } |
| 303 } | 303 } |
| 304 return false; | 304 return false; |
| 305 } | |
| 306 | |
| 307 HeapWord* HeapRegion::next_block_start_careful(HeapWord* addr) { | |
| 308 HeapWord* low = addr; | |
| 309 HeapWord* high = end(); | |
| 310 while (low < high) { | |
| 311 size_t diff = pointer_delta(high, low); | |
| 312 // Must add one below to bias toward the high amount. Otherwise, if | |
| 313 // "high" were at the desired value, and "low" were one less, we | |
| 314 // would not converge on "high". This is not symmetric, because | |
| 315 // we set "high" to a block start, which might be the right one, | |
| 316 // which we don't do for "low". | |
| 317 HeapWord* middle = low + (diff+1)/2; | |
| 318 if (middle == high) return high; | |
| 319 HeapWord* mid_bs = block_start_careful(middle); | |
| 320 if (mid_bs < addr) { | |
| 321 low = middle; | |
| 322 } else { | |
| 323 high = mid_bs; | |
| 324 } | |
| 325 } | |
| 326 assert(low == high && low >= addr, "Didn't work."); | |
| 327 return low; | |
| 328 } | 305 } |
| 329 | 306 |
| 330 HeapRegion::HeapRegion(uint hrm_index, | 307 HeapRegion::HeapRegion(uint hrm_index, |
| 331 G1BlockOffsetSharedArray* sharedOffsetArray, | 308 G1BlockOffsetSharedArray* sharedOffsetArray, |
| 332 MemRegion mr) : | 309 MemRegion mr) : |