Fortran: Use associated TBP subroutine not found [PR89092]

2025-08-13  Paul Thomas  <pault@gcc.gnu.org>

gcc/fortran
	PR fortran/89092
	* resolve.cc (was_declared): Add subroutine attribute.

gcc/testsuite/
	PR fortran/89092
	* gfortran.dg/pr89092.f90: New test.

2 files changed, 50 insertions, 1 deletions

diff --git a/gcc/fortran/resolve.cc b/gcc/fortran/resolve.cc
index 68aaee8..6b01b8f 100644
--- a/gcc/fortran/resolve.cc
+++ b/gcc/fortran/resolve.cc
@@ -1630,7 +1630,7 @@ was_declared (gfc_symbol *sym)
   if (a.allocatable || a.dimension || a.dummy || a.external || a.intrinsic
       || a.optional || a.pointer || a.save || a.target || a.volatile_
       || a.value || a.access != ACCESS_UNKNOWN || a.intent != INTENT_UNKNOWN
-      || a.asynchronous || a.codimension)
+      || a.asynchronous || a.codimension || a.subroutine)
     return 1;
 
   return 0;
diff --git a/gcc/testsuite/gfortran.dg/pr89092.f90 b/gcc/testsuite/gfortran.dg/pr89092.f90
new file mode 100644
index 0000000..2164994
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr89092.f90
@@ -0,0 +1,49 @@
+! { dg-do compile }
+! { dg-options "-fdump-tree-original" }
+module AModule
+   implicit none
+   private
+   public Foo
+
+   interface Foo
+      module procedure FooPrivate
+   end interface
+contains
+   subroutine FooPrivate(x)
+      integer :: x
+
+      write(*,*) 'Foo(integer)'
+   end subroutine
+end module
+module BModule
+   implicit none
+   private
+
+   type, public :: BType
+   contains
+      procedure :: Foo
+   end type
+contains
+   subroutine Foo(self)
+      class(BType) :: self
+
+      write(*,*) 'Foo(BType)'
+   end subroutine
+end module
+program iface_tbp_test
+   use AModule
+   implicit none
+
+   call test()
+
+contains
+   subroutine test()
+      use BModule
+
+      type(BType) :: y
+
+      call y%Foo()
+      call Foo(1)
+   end subroutine
+end program
+! { dg-final { scan-tree-dump-times "foo \\(&class.2\\)" 1 "original" } }