[Bug rtl-optimization/108039] Unnecessary extension storing same value twice to small location

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108039

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I did something similar years ago:
https://gcc.gnu.org/pipermail/gcc-patches/2010-October/297761.html
https://gcc.gnu.org/pipermail/gcc-patches/2010-October/297762.html