[Bug fortran/52370] [4.7/4.8/4.9 Regression] Spurious "may be used uninitialized" warning for check of optional argument

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52370

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Until we get more fine-grained warning control, I believe the only way to fix
this is make sure TREE_NO_WARNING is set on Fortran optional argument related
variables (not just the data pointer (b.0 here), but I think the others too
(bounds, size, ...).