[PATCH] Fortran: passing of derived type to VALUE,OPTIONAL dummy argument [PR118080]

[Harald Anlauf]

Dear all,

the attached patch fixes inconsistent handling of passing derived type
actual arguments to scalar dummies with VALUE,OPTIONAL attribute.
As suggested by Tobias, we should consistently pass a hidden boolean
flag that indicates the presence or absence of the actual, similar to
the case of intrinsic types.  For more details see the attached.

Regtested on x86_64-pc-linux-gnu.  OK for mainline?

Thanks,
Harald

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