| commit | 8fbbdca45c0eb2ef4a434cdef883f5c36516376c | [log] [tgz] |
|---|---|---|
| author | Cameron Zwarich <zwarich@apple.com> | Fri Feb 25 01:11:01 2011 +0000 |
| committer | Cameron Zwarich <zwarich@apple.com> | Fri Feb 25 01:11:01 2011 +0000 |
| tree | 19eab9d6eca4d21a4e6994eff635d2666dd301d0 | |
| parent | 33b554795def5cd50f961721acbb33246226824b [diff] |
Set NumSignBits to 1 if KnownZero/KnownOne are being zero extended. In theory it is possible to do better if the high bit is set in either KnownZero/KnownOne, but in practice NumSignBits is always 1 when we are zero extending because nothing is known about that register. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126465 91177308-0d34-0410-b5e6-96231b3b80d8