The itanium ABI represents the PMF as a pair of pointers. As such the
structure cannot be passed through a single register. Diagnose such
cases in the frontend rather than trying to generate IR to perform this
compnerd on Nov 22 2022, 10:55 AM.Authored by
Generally LGTM but I'd appreciate a second pass by @rnk in case I've missed something.
(Accepting Revision for Closing)