[Bug tree-optimization/66873] fortran variant of outer-1.c not parallelized by autopar

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66873

--- Comment #4 from vries at gcc dot gnu.org ---
Created attachment 35983
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35983&action=edit
Tentative patch

Using this tentative patch, we use graphite analysis (if available) by default
for parloops. That way, we manage to parallelize the fortran example using just
-ftree-parallelize-loops=2.