[Bug tree-optimization/69848] poor vectorization of a loop from SPEC2006 464.h264ref

[wilson at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69848

--- Comment #1 from Jim Wilson <wilson at gcc dot gnu.org> ---
Created attachment 37716
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37716&action=edit
code generated by -O2 -ftree-vectorize