Fortran] PR 92208 don't use function-result dummy variable as actual argument

        PR fortran/92208
        * trans-array.c (gfc_conv_array_parameter): Only copy
        string-length backend_decl if expression is not a function.

        PR fortran/92208
        * gfortran.dg/pr92208.f90: New.

From-SVN: r277639

gcc/fortran/ChangeLog

+2019-10-30  Tobias Burnus  <tobias@codesourcery.com>
+
+	PR fortran/92208
+	* trans-array.c (gfc_conv_array_parameter): Only copy
+	string-length backend_decl if expression is not a function.
+
 2019-10-30  Mark Eggleston  <mark.eggleston@codethink.com>
 
 	* invoke.texi: Add -Wno-overwrite-recursive to list of options. Add

gcc/fortran/trans-array.c

@@ -8049,7 +8049,7 @@ gfc_conv_array_parameter (gfc_se * se, gfc_expr * expr, bool g77,
 	  /* The components shall be deallocated before their containing entity.  */
 	  gfc_prepend_expr_to_block (&se->post, tmp);
 	}
-      if (expr->ts.type == BT_CHARACTER)
+      if (expr->ts.type == BT_CHARACTER && expr->expr_type != EXPR_FUNCTION)
 	se->string_length = expr->ts.u.cl->backend_decl;
       if (size)
 	array_parameter_size (se->expr, expr, size);

gcc/testsuite/ChangeLog

+2019-10-30  Tobias Burnus  <tobias@codesourcery.com>
+
+	PR fortran/92208
+	* gfortran.dg/pr92208.f90: New.
+
 2019-10-30  Marek Polacek  <polacek@redhat.com>
 
 	PR c++/92134 - constinit malfunction in static data member.

gcc/testsuite/gfortran.dg/pr92208.f90

+! { dg-do run }
+!
+! PR fortran/92208
+!
+! Contributed by Nils Reiche
+!
+program stringtest
+  implicit none
+  integer, parameter :: noVars = 2
+
+!  print*, "varNames: ", createVarnames("var",noVars)
+  call function1(noVars,createVarnames("var",noVars),"path")
+
+contains
+
+function createVarnames(string,noVars) result(stringArray)
+  implicit none
+  character(len=*),                        intent(in)  :: string
+  integer,                                 intent(in)  :: noVars
+  character(len=len_trim(string)+6), dimension(noVars) :: stringArray
+  integer :: i
+  do i=1,noVars
+    write(stringArray(i),'(a,i0)') string, i
+  enddo
+end function createVarnames
+
+subroutine function1(noVars,varNames,path)
+  implicit none
+  integer, intent(in)  :: noVars
+  character(len=*), intent(in)  :: path
+  character(len=*), dimension(noVars) :: varNames
+
+  if (path /= 'path') stop 1
+  if (any(varNames /= ['var1', 'var2'])) stop 2
+  !print*, "function1-path    : ", trim(path)
+  !print*, "function1-varNames: ", varNames
+end subroutine function1
+
+end program stringtest