Peter Klausler 0c190575eb [flang] Make generic resolution conform to 15.5.5.2 w/r/t host association ...

When two or more generic interfaces are available by declaration or
by USE association at different scoping levels, we need to search
the outer generic interfaces as well as the inner ones, but only after
the inner ones have failed to produce a specific procedure that matches
a given set of actual arguments.  This means that it is possible for
a specific procedure of a generic interface of an inner scope to override
a conflicting specific procedure of a generic interface of an outer
scope.

Also cope with forward references to derived types when a generic
interface is also in scope.

Fixes LLVM bug https://github.com/llvm/llvm-project/issues/55240 and
LLVM bug https://github.com/llvm/llvm-project/issues/55300.

Differential Revision: https://reviews.llvm.org/D126587

2022-05-28 09:33:53 -07:00

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