[clang] [clang] [x86] Rewrite the Sys V Classification Algorithm to Better Match SysV ABI and gcc (PR #221746)

[Benjamin Luke via cfe-commits]

freaknbigpanda wrote:

Hi @efriedma-quic , can you help to take another pass on this? Really hoping to get this in to resolve the open issues

https://github.com/llvm/llvm-project/pull/221746