[clang] [llvm] [Clang][AArch64] Implement widening FMMLA intrinsics (PR #165282)

[via llvm-commits]

CarolineConcatto wrote:

Hi @efriedma-quic,
So we are working towards the memory dependency. 
I wrote and RFC:
https://discourse.llvm.org/t/rfc-improving-fpmr-handling-for-fp8-intrinsics-in-llvm/86868/6
to check how to improve the handling of set.fprm. The suggestion was to do it through memory location in llvm(the store solution was rejected and the data dependency is not enough to block some wrong optimisations)
The   fprm register will map to one of the target locations


https://github.com/llvm/llvm-project/pull/165282