https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97156
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://stackoverflow.com/questions/21390165/why-does-breaking-the-output-dependency-of-lzcnt-matter
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62011
This was done because it is needed for some (most) Intel processors have an
errata were popcnt and tzcnt cause a false depenency on the destition register.
