[Bug rtl-optimization/65857] combine won't generate zero-extend from HImode memory

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65857

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The pattern it tries has the load of a in it.  Not sure what you are
expecting...