| commit | b5a55d979c84e100f383ce11c5c5e3b616b9dcc4 | [log] [tgz] |
|---|---|---|
| author | Evan Cheng <evan.cheng@apple.com> | Tue May 24 01:48:22 2011 +0000 |
| committer | Evan Cheng <evan.cheng@apple.com> | Tue May 24 01:48:22 2011 +0000 |
| tree | 52d1aa5341d7eef05cc952b61bd9fdb68cabad10 | |
| parent | 4992b03cbdaad1df46ea771b587f247395e49999 [diff] |
- Teach SelectionDAG::isKnownNeverZero to return true (op x, c) when c is non-zero. - Teach X86 cmov optimization to eliminate the cmov from ctlz, cttz extension when the source of X86ISD::BSR / X86ISD::BSF is proven to be non-zero. rdar://9490949 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131948 91177308-0d34-0410-b5e6-96231b3b80d8