[clang] [llvm] [ARM][AArch32] Add support for AArch32 Cortex-M52 CPU (PR #74822)

[Jonathan Thackray via cfe-commits]

jthackray wrote:

> Going by the page (didn't see a link to a manual, maybe I missed it), MVE and FPU are optional.
> 
> "Optional Helium technology (M-profile Vector Extension) supporting up to:" "Optional FPU with support for half precision (fp16), single precision (fp32) and double precision (fp64) floating-point operations."
> 
> Is this following a pattern from previous CPUs where these things are optional, but users are expected to pass `+nomve` etc. to disable them? (I don't disagree with that, just want to keep it consistent)

Yes, that's correct. We enable all mandatory and optional architecture extensions, with the exception of crypto.

https://github.com/llvm/llvm-project/pull/74822