https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102392
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Failure to optimize out |Failure to optimize a sign
|sign extension when input |extension to a zero
|is non-negative |extension
Component|middle-end |target
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> Actually this can be done without the __builtin_unreachable due to the abi.
I mean this can never be done without it. Also a zero extend vs sign extend
might be the same cost really. So it does not matter in the end.
Note the move you reference is zero extend.
