[Bug target/85539] x86_64: loads are not always narrowed

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85539

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
             Target|                            |x86_64-*-*, i?86-*-*
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-04-27
                 CC|                            |rguenth at gcc dot gnu.org
            Version|unknown                     |9.0
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  This could be done on GIMPLE as well (beware of endianess!), for
example in the bswap pass or in forwprop.  Of course on RTL we can also do this
and have a better idea whether it will be profitable.