find_first_parameter_load returns an rtx_insn

2014-08-21  David Malcolm  <dmalcolm@redhat.com>

	* rtl.h (find_first_parameter_load): Strengthen return type from
	rtx to rtx_insn *.
	* rtlanal.c (find_first_parameter_load): Strengthen return type
	from rtx to rtx_insn *.  Add checked cast for now, to postpone
	strengthening the params.

From-SVN: r214252

gcc/ChangeLog

+2014-08-21  David Malcolm  <dmalcolm@redhat.com>
+
+	* rtl.h (find_first_parameter_load): Strengthen return type from
+	rtx to rtx_insn *.
+	* rtlanal.c (find_first_parameter_load): Strengthen return type
+	from rtx to rtx_insn *.  Add checked cast for now, to postpone
+	strengthening the params.
+
 2014-08-21  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
 	PR fortran/44054

gcc/rtl.h

@@ -2641,7 +2641,7 @@ extern int auto_inc_p (const_rtx);
 extern int in_expr_list_p (const_rtx, const_rtx);
 extern void remove_node_from_expr_list (const_rtx, rtx *);
 extern int loc_mentioned_in_p (rtx *, const_rtx);
-extern rtx find_first_parameter_load (rtx, rtx);
+extern rtx_insn *find_first_parameter_load (rtx, rtx);
 extern bool keep_with_call_p (const_rtx);
 extern bool label_is_jump_target_p (const_rtx, const_rtx);
 extern int insn_rtx_cost (rtx, bool);

gcc/rtlanal.c

@@ -3684,7 +3684,7 @@ parms_set (rtx x, const_rtx pat ATTRIBUTE_UNUSED, void *data)
    found if CSE has eliminated some of them (e.g., an argument
    to the outer function is passed down as a parameter).
    Do not skip BOUNDARY.  */
-rtx
+rtx_insn *
 find_first_parameter_load (rtx call_insn, rtx boundary)
 {
   struct parms_set_data parm;
@@ -3746,7 +3746,7 @@ find_first_parameter_load (rtx call_insn, rtx boundary)
 	    break;
 	}
     }
-  return first_set;
+  return safe_as_a <rtx_insn *> (first_set);
 }
 
 /* Return true if we should avoid inserting code between INSN and preceding