| commit | a40a3a59818d1fe394f23cda1df940762e30ea65 | [log] [tgz] |
|---|---|---|
| author | David Majnemer <david.majnemer@gmail.com> | Thu Apr 18 07:30:07 2013 +0000 |
| committer | David Majnemer <david.majnemer@gmail.com> | Thu Apr 18 07:30:07 2013 +0000 |
| tree | 955cb6028bd96331f3d0893d7816b0bcc5137e30 | |
| parent | 0556900b260eed881a2f47a2b5267ae3a7cc7ae0 [diff] |
Combine bit test + conditional or into simple math Simplify: (select (icmp eq (and X, C1), 0), Y, (or Y, C2)) Into: (or (shl (and X, C1), C3), y) Where: C3 = Log(C2) - Log(C1) If: C1 and C2 are both powers of two git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179748 91177308-0d34-0410-b5e6-96231b3b80d8