https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116972
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|tree-optimization |target
Summary|missed vectorization when |_march=x86_64 uses rep
|an array of type 'long' is |instead of see to do the
|initialized to 0 |zeroing
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is not exactly a missed optimization. Rather the default settings for the
generic x86_64 is to use rep stosq for the memset of 0 rather than use the
vector registers to do the zeroing.
If you use different-march= you see that.
