| commit | ca9b7037e28759c200fe5ca98190cabd121a1bba | [log] [tgz] |
|---|---|---|
| author | Dan Gohman <gohman@apple.com> | Mon Apr 12 21:13:43 2010 +0000 |
| committer | Dan Gohman <gohman@apple.com> | Mon Apr 12 21:13:43 2010 +0000 |
| tree | 87d9cc525f270334d68ab1c057c8cba7b5cc8e81 | |
| parent | dae9efc23e959d4452f5b67706896ea292b687f3 [diff] |
Suppress LinearFunctionTestReplace when the computed backedge-taken expression is a UDiv and it doesn't appear that the UDiv came from the user's source. ScalarEvolution has recently figured out how to compute a tripcount expression for the inner loop in SingleSource/Benchmarks/Shootout/sieve.c, using a udiv. Emitting a udiv instruction dramatically slows down the enclosing loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101068 91177308-0d34-0410-b5e6-96231b3b80d8