| commit | 5eb308b9448ee5b14fac26c0533eac481bc28471 | [log] [tgz] |
|---|---|---|
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | Fri Aug 06 22:17:33 2010 +0000 |
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | Fri Aug 06 22:17:33 2010 +0000 |
| tree | c0e36f48b6e73127b81d74482435b2a3149b0c02 | |
| parent | 4945dd8314c4cbf03271ff622b2ae777975c8309 [diff] |
Lazily defer duplicating the live interval we are splitting until we know it is necessary. Sometimes, live range splitting doesn't shrink the current interval, but simply changes some instructions to use a new interval. That makes the original more suitable for spilling. In this case, we don't need to duplicate the original. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110481 91177308-0d34-0410-b5e6-96231b3b80d8