[clang] [llvm] [SystemZ][z/OS] __ptr32 support for z/OS (PR #101696)

[Abhina Sree via cfe-commits]

abhina-sree wrote:

Enabling __ptr32 keyword to support in Clang for z/OS. It is represented by addrspace(1) in LLVM IR. Unlike existing implementation, __ptr32 is not mangled into symbol names for z/OS.

https://github.com/llvm/llvm-project/pull/101696