Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/opto/coalesce.cpp
src/share/vm/opto/coalesce.cpp
- changeset 2085
- f55c4f82ab9d
- parent 1907
- c18cbe5936b8
- child 2314
- f95d63e2154a
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| 2084:13b87063b4d8 | 2085:f55c4f82ab9d |
|---|---|
| 778 RegMask rm = lrgs(lr1).mask(); | 778 RegMask rm = lrgs(lr1).mask(); |
| 779 rm.AND(lrgs(lr2).mask()); | 779 rm.AND(lrgs(lr2).mask()); |
| 780 // Number of bits free | 780 // Number of bits free |
| 781 uint rm_size = rm.Size(); | 781 uint rm_size = rm.Size(); |
| 782 | 782 |
| 783 if (UseFPUForSpilling && rm.is_AllStack() ) { | |
| 784 // Don't coalesce when frequency difference is large | |
| 785 Block *dst_b = _phc._cfg._bbs[dst_copy->_idx]; | |
| 786 Block *src_def_b = _phc._cfg._bbs[src_def->_idx]; | |
| 787 if (src_def_b->_freq > 10*dst_b->_freq ) | |
| 788 return false; | |
| 789 } | |
| 790 | |
| 783 // If we can use any stack slot, then effective size is infinite | 791 // If we can use any stack slot, then effective size is infinite |
| 784 if( rm.is_AllStack() ) rm_size += 1000000; | 792 if( rm.is_AllStack() ) rm_size += 1000000; |
| 785 // Incompatible masks, no way to coalesce | 793 // Incompatible masks, no way to coalesce |
| 786 if( rm_size == 0 ) return false; | 794 if( rm_size == 0 ) return false; |
| 787 | 795 |
