| commit | 6f1d7994155c535455b7543e2af6dce5b65de37b | [log] [tgz] |
|---|---|---|
| author | Duncan Sands <baldrick@free.fr> | Fri Mar 09 13:45:18 2012 +0000 |
| committer | Duncan Sands <baldrick@free.fr> | Fri Mar 09 13:45:18 2012 +0000 |
| tree | b125eb533a37305c98fc18e5c5c129e2f39a111c | |
| parent | 7415659bf8b8523ab8b706caa461984a199dc3c8 [diff] |
Eliminate switch cases that can never match, for example removes all negative switch cases if the branch condition is known to be positive. Inspired by a recent improvement to GCC's VRP. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152405 91177308-0d34-0410-b5e6-96231b3b80d8