[Bug tree-optimization/99956] loop interchange fails when altering bwaves inner loop

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99956

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 50523
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50523&action=edit
DSE patch

For reference this is the patch adding an additional DSE pass which fails the
existing gfortran.dg/pr81303.f and it's vect/ variant.