Don't copy just to capture a strong block pointer under ARC.
It turns out that the optimizer can't eliminate this without extra
information, for which there's a separate bug.

rdar://13588325

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179069 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed