[Bug fortran/79430] [7 Regression] action of statement incorrectly optimised away

[juergen.reuter at desy dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79430

--- Comment #45 from Jürgen Reuter <juergen.reuter at desy dot de> ---
Looking into my backups, it seems that the revision 241975 from Nov 8, 2016 was
still working without the `volatile` hack. Then I upgraded in early February to
revision 245197 where the problem is already present. Unfortunately I cannot
narrow it down any further. Any smaller test case is incredibly difficult to
produce for us.