[Bug fortran/48405] Handle expressions in DO loops for front-end optimization

[tkoenig at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48405

--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2011-04-19 05:19:12 UTC ---
Created attachment 24039
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24039
Proposed patch

This should work (and also fix some other bugs as well).