re PR fortran/80440 (Slow compile when USEing modules)

2017-04-17  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/80440
	* module.c (find_symtree_for_symbol): Delete.
	(read_module): Remove the call to the above.

From-SVN: r246952

gcc/fortran/ChangeLog

+2017-04-17  Paul Thomas  <pault@gcc.gnu.org>
+
+	PR fortran/80440
+	* module.c (find_symtree_for_symbol): Delete.
+	(read_module): Remove the call to the above.
+
 2017-04-14  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/80361
@@ -5,9 +11,9 @@
 	the recursive attribute.
 
 2017-04-10  Nicolas Koenig  <koenigni@student.ethz.ch>
-            Paul Thomas  <pault@gcc.gnu.org>
+	    Paul Thomas  <pault@gcc.gnu.org>
 
-	PR fortran/69498 
+	PR fortran/69498
 	* module.c (gfc_match_submodule): Add error
 	if function is called in the wrong state.
 
@@ -17,7 +23,7 @@
 	* expr.c (gfc_check_pointer_assign): Check if procedure pointer
 	components in a pointer assignment need an explicit interface.
 
-2017-03-18  Nicolas Koenig  <koenigni@student.ethz.ch> 
+2017-03-18  Nicolas Koenig  <koenigni@student.ethz.ch>
 
 	PR fortran/69498
 	* symbol.c (gfc_delete_symtree): If there is a period in the name, ignore

gcc/fortran/module.c

@@ -4292,31 +4292,6 @@ mio_symbol (gfc_symbol *sym)
 
 /************************* Top level subroutines *************************/
 
-/* Given a root symtree node and a symbol, try to find a symtree that
-   references the symbol that is not a unique name.  */
-
-static gfc_symtree *
-find_symtree_for_symbol (gfc_symtree *st, gfc_symbol *sym)
-{
-  gfc_symtree *s = NULL;
-
-  if (st == NULL)
-    return s;
-
-  s = find_symtree_for_symbol (st->right, sym);
-  if (s != NULL)
-    return s;
-  s = find_symtree_for_symbol (st->left, sym);
-  if (s != NULL)
-    return s;
-
-  if (st->n.sym == sym && !check_unique_name (st->name))
-    return st;
-
-  return s;
-}
-
-
 /* A recursive function to look for a specific symbol by name and by
    module.  Whilst several symtrees might point to one symbol, its
    is sufficient for the purposes here than one exist.  Note that
@@ -5119,16 +5094,6 @@ read_module (void)
 	  info->u.rsym.referenced = 1;
 	  continue;
 	}
-
-      /* If possible recycle the symtree that references the symbol.
-	 If a symtree is not found and the module does not import one,
-	 a unique-name symtree is found by read_cleanup.  */
-      st = find_symtree_for_symbol (gfc_current_ns->sym_root, sym);
-      if (st != NULL)
-	{
-	  info->u.rsym.symtree = st;
-	  info->u.rsym.referenced = 1;
-	}
     }
 
   mio_rparen ();