Sean Callanan a6cbf06d0a Two fixes for Objetive-C methods that return struct ...

types.  First, I added handling for the memset intrinsic
in the IR, which is used to zero out the returned struct.
Second, I fixed the object-checking instrumentation
to objc_msgSend_stret, and generally tightened up how
the object-checking functions get inserted.

llvm-svn: 144741

2011-11-16 00:20:50 +00:00

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