objective-C blocks: Check for record type when deciding if 
byref variable requires extended layout info. to prevent 
a crash involving arrays declared __block. // rdar://12787751


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169908 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed