[Bug rtl-optimization/78085] extra sign extend if used to store in 32bit and return 64bit and the upper bits are known to be zeroed.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78085

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely r13-1942-gc23a9c87cc62bd .