[clang] [flang] [llvm] [X86][AVX10] Remove EVEX512 and AVX10-256 implementations (PR #157034)

[Phoebe Wang via cfe-commits]

phoebewang wrote:

> > I see the problem. It's expected to see the 2nd error before this patch.
> 
> Yes, a proper error rather than an assertion failure would be a better failure mode: https://gcc.godbolt.org/z/Tbns9qYx7

The error is due to missing required features. It's already checked in the FE. The problem here is to run new IR with old llc, which is not guaranteed.

https://github.com/llvm/llvm-project/pull/157034