Bug fix for 3.4 branch - missing addrspacecast generation in Clang

[Tom Stellard]

John,

Is this patch OK to merge to the 3.4 branch?

-Tom

On Thu, May 15, 2014 at 12:55:48AM +0200, Manuel Jacob wrote:
> Hi Tom,
> 
> with the release of LLVM 3.4, the semantics of the bitcast
> instruction were changed to not allow cross-address space casts.
> However, the change that fixes Clang IR generation was committed
> after 3.4 was branched.
> 
> The (cfe) SVN revision is: 197036
> 
> -Manuel