re PR middle-end/53437 (FAIL: gcc.dg/guality/inline-params.c -O0)

2012-05-22  Richard Guenther  <rguenther@suse.de>

	PR middle-end/53437
	* tree-inline.c (setup_one_parameter): Create a dummy init
	statement for unused parameters when not optimizing.

From-SVN: r187767

gcc/ChangeLog

 2012-05-22  Richard Guenther  <rguenther@suse.de>
 
+	PR middle-end/53437
+	* tree-inline.c (setup_one_parameter): Create a dummy init
+	statement for unused parameters when not optimizing.
+
+2012-05-22  Richard Guenther  <rguenther@suse.de>
+
 	* tree-flow.h (add_referenced_var_1): Declare.
 	(add_referenced_var): Define.
 	* tree-dfa.c (referenced_var_check_and_insert): Avoid one hash

gcc/tree-inline.c

@@ -2701,7 +2701,8 @@ setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn,
       STRIP_USELESS_TYPE_CONVERSION (rhs);
 
       /* If we are in SSA form properly remap the default definition
-         or omit the initialization if the parameter is unused.  */
+         or assign to a dummy SSA name if the parameter is unused and
+	 we are not optimizing.  */
       if (gimple_in_ssa_p (cfun) && is_gimple_reg (p))
 	{
 	  if (def)
@@ -2711,6 +2712,11 @@ setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn,
 	      SSA_NAME_IS_DEFAULT_DEF (def) = 0;
 	      set_default_def (var, NULL);
 	    }
+	  else if (!optimize)
+	    {
+	      def = make_ssa_name (var, NULL);
+	      init_stmt = gimple_build_assign (def, rhs);
+	    }
 	}
       else
         init_stmt = gimple_build_assign (var, rhs);