lto-lang.c (lto_attribute_table): Handle *tm regparm.

	* lto-lang.c (lto_attribute_table): Handle *tm regparm.
	(ignore_attribute): New.

From-SVN: r181882

gcc/lto/ChangeLog

+2011-12-01  Uros Bizjak  <ubizjak@gmail.com>
+
+	* lto-lang.c (lto_attribute_table): Handle *tm regparm.
+	(ignore_attribute): New.
+
 2011-11-21  Aldy Hernandez  <aldyh@redhat.com>
 
 	* lto-lang.c (lto_attribute_table): Handle transaction_pure.

gcc/lto/lto-lang.c

@@ -47,6 +47,8 @@ static tree handle_nothrow_attribute (tree *, tree, tree, int, bool *);
 static tree handle_sentinel_attribute (tree *, tree, tree, int, bool *);
 static tree handle_type_generic_attribute (tree *, tree, tree, int, bool *);
 static tree handle_transaction_pure_attribute (tree *, tree, tree, int, bool *);
+static tree ignore_attribute (tree *, tree, tree, int, bool *);
+
 static tree handle_format_attribute (tree *, tree, tree, int, bool *);
 static tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
 
@@ -78,6 +80,10 @@ const struct attribute_spec lto_attribute_table[] =
 			      handle_type_generic_attribute, false },
   { "transaction_pure",	      0, 0, false, true, true,
 			      handle_transaction_pure_attribute, false },
+  /* For internal use only.  The leading '*' both prevents its usage in
+     source code and signals that it may be overridden by machine tables.  */
+  { "*tm regparm",            0, 0, false, true, true,
+			      ignore_attribute, false },
   { NULL,                     0, 0, false, false, false, NULL, false }
 };
 
@@ -419,6 +425,18 @@ handle_transaction_pure_attribute (tree *node, tree ARG_UNUSED (name),
   return NULL_TREE;
 }
 
+/* Ignore the given attribute.  Used when this attribute may be usefully
+   overridden by the target, but is not used generically.  */
+
+static tree
+ignore_attribute (tree * ARG_UNUSED (node), tree ARG_UNUSED (name),
+		  tree ARG_UNUSED (args), int ARG_UNUSED (flags),
+		  bool *no_add_attrs)
+{
+  *no_add_attrs = true;
+  return NULL_TREE;
+}
+
 /* Handle a "format" attribute; arguments as in
    struct attribute_spec.handler.  */