[Bug tree-optimization/77689] Missing vectorization lead to huge performance loss

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77689

Jan Hubicka <hubicka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |hubicka at gcc dot gnu.org

--- Comment #15 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
loop splitting gives up here because it only handles test
  i < val
or 
  i > val

Not i = val.  It could easily work out that i == 0 is same as i < 1 from vlaue
range of i.