[Bug middle-end/57904] [4.9 Regression] Bogus(?) "invokes undefined behavior" warning with Fortran's finalization wrapper (gfortran.dg/class_48.f90)

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57904

--- Comment #17 from Jeffrey A. Law <law at redhat dot com> ---
Dominique, thanks for verifying that 58746 is a duplicate.  I was wondering
about that.

Richi, we've known for a long time (since the early 90s) that running CSE soon
after loop unrolling is profitable.  Soooo, why not run conditionally run DOM
after unrolling?   That wouldn't create a compile-time hit for a typical -O2
compilation.