[Bug fortran/87597] [6/7/8/9 Regression] wrong result with matmul inlining

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87597

--- Comment #4 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #2)
> Workaround: use -fno-frontend-optimize.

Or replace:
   complex, dimension(0:3,0:3), parameter :: gamma5
by
   complex, dimension(1:4,1:4), parameter :: gamma5
also works.