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| author | Chandler Carruth <chandlerc@gmail.com> | 2012-01-05 11:05:55 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2012-01-05 11:05:55 +0000 |
| commit | e041a30bb9abf8080841991dce5d00e3d663a80a (patch) | |
| tree | ae8a6481ef5b0b183a330fb62fd26c08d7d86bf2 /llvm/lib/Support/CommandLine.cpp | |
| parent | 6bc151f5d4202e26d344e483b46d235711ffefd7 (diff) | |
| download | llvm-e041a30bb9abf8080841991dce5d00e3d663a80a.zip llvm-e041a30bb9abf8080841991dce5d00e3d663a80a.tar.gz llvm-e041a30bb9abf8080841991dce5d00e3d663a80a.tar.bz2 | |
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.
llvm-svn: 147604
Diffstat (limited to 'llvm/lib/Support/CommandLine.cpp')
0 files changed, 0 insertions, 0 deletions