[Bug fortran/80304] [7 Regression] do-concurrent dosn't work well with gfortran 7.

[chinoune.mehdi at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80304

--- Comment #8 from Chinoune <chinoune.mehdi at hotmail dot com> ---
(In reply to Thomas Koenig from comment #7)
> Fun fact: -flto also fixes it.

It fixes the first test not the second (comment #5)