| commit | 9a526495e0c06c4014d7500788cad1929fd244d3 | [log] [tgz] |
|---|---|---|
| author | Jim Grosbach <grosbach@apple.com> | Wed Jun 23 16:07:42 2010 +0000 |
| committer | Jim Grosbach <grosbach@apple.com> | Wed Jun 23 16:07:42 2010 +0000 |
| tree | dbab44706775e2cd8dbfcd7b8529afffa2271c93 | |
| parent | b9cd499dec44397571b682c9de3f132df2721bb5 [diff] |
Some targets don't require the fencing MEMBARRIER instructions surrounding atomic intrinsics, either because the use locking instructions for the atomics, or because they perform the locking directly. Add support in the DAG combiner to fold away the fences. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106630 91177308-0d34-0410-b5e6-96231b3b80d8