[Bug fortran/86945] BUG with optimisation of select case statement in gfortran v8.x

[anlauf at gmx dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86945

--- Comment #2 from Harald Anlauf <anlauf at gmx dot de> ---
Changing the line:

    case(:-1)

to

    case(-HUGE(0):-1)

makes the bug disappear; changing it to

    case(-HUGE(0)-1:-1)

makes it reappear.