re PR debug/47106 (-fcompare-debug failure (length) with -fpartial-inlining…

re PR debug/47106 (-fcompare-debug failure (length) with  -fpartial-inlining -flto -fconserve-stack)

PR debug/47106
PR debug/47402
* tree-inline.c (declare_return_variable): Add result decl to
local decls only once.
* gimple-low.c (record_vars_into): Mark newly-created variables
as referenced.

From-SVN: r169514

gcc/ChangeLog

 2011-02-02  Alexandre Oliva  <aoliva@redhat.com>
 
+	PR debug/47106
+	PR debug/47402
+	* tree-inline.c (declare_return_variable): Add result decl to
+	local decls only once.
+	* gimple-low.c (record_vars_into): Mark newly-created variables
+	as referenced.
+
+2011-02-02  Alexandre Oliva  <aoliva@redhat.com>
+
 	PR debug/47498
 	PR debug/47501
 	PR debug/45136

gcc/gimple-low.c

@@ -907,6 +907,8 @@ record_vars_into (tree vars, tree fn)
 
       /* Record the variable.  */
       add_local_decl (cfun, var);
+      if (gimple_referenced_vars (cfun))
+	add_referenced_var (var);
     }
 
   if (fn != current_function_decl)

gcc/tree-inline.c

@@ -2864,7 +2864,6 @@ declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest,
     }
 
   DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
-  add_local_decl (DECL_STRUCT_FUNCTION (caller), var);
 
   /* Do not have the rest of GCC warn about this variable as it should
      not be visible to the user.  */