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diff --git a/gcc/testsuite/gfortran.dg/module_procedure_1.f90 b/gcc/testsuite/gfortran.dg/module_procedure_1.f90
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+! { dg-do run }
+! Modified program from http://groups.google.com/group/\
+! comp.lang.fortran/browse_frm/thread/423e4392dc965ab7#
+!
+module myoperator
+ contains
+ function dadd(arg1,arg2)
+ integer ::dadd(2)
+ integer, intent(in) :: arg1(2), arg2(2)
+ dadd(1)=arg1(1)+arg2(1)
+ dadd(2)=arg1(2)+arg2(2)
+ end function dadd
+end module myoperator
+
+program test_interface
+
+ use myoperator
+
+ implicit none
+
+ interface operator (.myadd.)
+ module procedure dadd
+ end interface
+
+ integer input1(2), input2(2), mysum(2)
+
+ input1 = (/0,1/)
+ input2 = (/3,3/)
+ mysum = input1 .myadd. input2
+ if (mysum(1) /= 3 .and. mysum(2) /= 4) call abort
+
+ call test_sub(input1, input2)
+
+end program test_interface
+
+subroutine test_sub(input1, input2)
+
+ use myoperator
+
+ implicit none
+
+ interface operator (.myadd.)
+ module procedure dadd
+ end interface
+
+ integer, intent(in) :: input1(2), input2(2)
+ integer mysum(2)
+
+ mysum = input1 .myadd. input2
+ if (mysum(1) /= 3 .and. mysum(2) /= 4) call abort
+
+end subroutine test_sub
+! { dg-final { cleanup-modules "myoperator" } }