[clang] [clang][CodeGen] Emit atomic IR in place of optimized libcalls. (PR #73176)

[Jessica Clarke via cfe-commits]

jrtc27 wrote:

Part of that confusion comes from SPARC's own naming. V9 is the CPU, but a V9 CPU being used for 32-bit code is called V8+...

https://github.com/llvm/llvm-project/pull/73176