Warn for un-parenthesized '&' inside '|' (a & b | c), rdar://9553326.

Patch by Henry Mason with tweaks by me.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133453 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed