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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-01-29 12:34:05 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-01-29 12:34:05 +0000 |
| commit | 2c94b4201beccbd061fd679ea7e9db1381fe8357 (patch) | |
| tree | c9e4e2e881b416c3a3292e02e138ca76fb48185b /lib/Analysis/ValueTracking.cpp | |
| parent | 60f5ad46c2147af79035a43e5745e46376124780 (diff) | |
Add the missing sub identity "A-(A-B) -> B" to DAGCombine.
This happens e.g. for code like "X - X%10" where we lower the modulo operation
to a series of multiplies and shifts that are then subtracted from X, leading to
this missed optimization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124532 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ValueTracking.cpp')
0 files changed, 0 insertions, 0 deletions