[clang] [clang-tools-extra] [compiler-rt] [llvm] [X86] AMD Zen 6 Initial enablement (PR #179150)

[Simon Pilgrim via cfe-commits]

RKSimon wrote:

> BITREVERSE includes all integer types whereas BITREVB is byte granular. So, thought of having it separately.

I don't think thats necessary - SSE/AVX already have plenty of intrinsics that wrap generics but are only available for some integer types (multiply and add/sub saturation are examples that come to mind but there's plenty of others) - the more we avoid target specifics the better imo.

https://github.com/llvm/llvm-project/pull/179150