[PATCH] Support for address space casting in order to map these on the new 'addrspacecast' IR instruction

[David Tweed]

  Regarding your response, that seems reasonable. I guess it's up to the "address spaces for security" guys to validate clang's semantic checking with respect to their needs. (I'd been thinking about devious things like somehow creating an one of those pointer types and using it to put the "evasion of the security sandboxing" into the generated LLVM IR, but that's for the more security knowledgeable to deal with.)

http://llvm-reviews.chandlerc.com/D2241