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

[dominiq at lps dot ens.fr]

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

--- Comment #20 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
Is this really a regression?

I have run 'make check -k' with gfortran 5.4.0, 6.3.0, and a patched trunk at
revision r245279. I see respectively 258, 259, and 199 FAILs, and
mlm_matching_isr is always failing.