RFD: switch/case statement dispatch using hash

[Joern Wolfgang Rennecke]

On 23/06/2025 12:31, Florian Weimer wrote:
> Also carry-less multiply persumably.
> 
> It's challenging to use those instructions for compiling switch
> statements because they would then be used all over the place.

Not necessarily; you can hide them in an UNSPEC if you are worried that
exposing the exact semantics leads to inappropriate uses.