RISC-V does not use address spaces and leaves them available for user
code to make use of. Intrinsics, however, required pointer types to use
the default address space, complicating handling during lowering to
handle non-default address spaces. When the intrinsics are overloaded,
this is handled without extra effort.
This commit does not yet update Clang builtin functions to also permit
pointers to non-default address spaces.
86d1d4eacb