Add invariant.load metadata to loads from selector references.  Allows these loads to later be moved/combined in the optimizer.  Fixes <rdar://problem/6027699>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144318 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed