John McCall 9320b87cff Give conversions of block pointers to ObjC pointers a different cast kind ...

than conversions of C pointers to ObjC pointers.  In order to ensure that
we've caught every case, add asserts to CastExpr that strictly determine
which cast kind is used for which kind of bit cast.

llvm-svn: 139352

2011-09-09 05:25:32 +00:00

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