[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 #2 from Chinoune <chinoune.mehdi at hotmail dot com> ---
(In reply to Dominique d'Humieres from comment #1)
> WORKSFORME on x86_64-apple-darwin16 from 4.8 up to trunk (7.0):
> 
>    10.0000000       6.00000000    
>    10.0000000       6.00000000    
>    10.0000000       6.00000000

it works well without optimization.

did you use the optimization directives : -Ox ( -O1,-O2,-O3 ..)