[Bug fortran/51338] [4.6/4.7 Regression] seg fault in gfc_dep_compare_expr with -O2

[bdavis at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51338

--- Comment #6 from Bud Davis <bdavis at gcc dot gnu.org> 2011-11-28 23:20:27 
UTC ---
The above patch has no new testsuite regressions.
If someone wants to check and make sure the optimisation(s) that could or were
being done is still correct, and check this in, feel free to do so.

1 Hour 40 minutes after bug posted.  not bad.....

--bud