Unaligned block moves and MEM_ALIGN re-broken

[Richard Kenner]

    With your changes to the way memattrs alignment is initialized, GCC
    imposes a stricter, mode-based alignment on the MEM than the TYPE
    itself defines for that MEM.  

You've made that claim before and I still don't agree with it.

compute_record_mode in stor-layout.c is just one place that shows how
a mode is validated.

We do indeed require that an object of an integral mode be at an alignment
defined by GET_MODE_ALIGNMENT.

The only time when this isn't true is when STRICT_ALIGNMENT is not defined.
but in that case, why does the alignment matter?

    This is a regression in GCC which you have introduced.  

Can you be specific as to what has regressed?