| commit | 62dfc511524b28a9411f62e19d48120066c1e41b | [log] [tgz] |
|---|---|---|
| author | Chandler Carruth <chandlerc@gmail.com> | Thu Jan 05 11:05:55 2012 +0000 |
| committer | Chandler Carruth <chandlerc@gmail.com> | Thu Jan 05 11:05:55 2012 +0000 |
| tree | cdc0710c458931e3ea07b911144a432eb2f734d3 | |
| parent | 1e141a854e0ecaace5925039159daf9dd8426196 [diff] |
Prevent a DAGCombine from firing where there are two uses of a combined-away node and the result of the combine isn't substantially smaller than the input, it's just canonicalized. This is the first part of a significant (7%) performance gain for Snappy's hot decompression loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147604 91177308-0d34-0410-b5e6-96231b3b80d8