Reload Issue -- I can't believe we haven't hit this before

[Eric Botcazou]

> > For 3.3 and 3.4, this was "fixed" by not recording memory equivalences
> > that have the infamous RTX_UNCHANGING_P flag set.
>
> Also a possibility.  Making the equivalent change (!MEM_READONLY_P)
> appears to do the trick for mainline.

Yes, but that's of course not optimal, unnecessary spills are generated.

-- 
Eric Botcazou