attribs.c (lookup_attribute_spec): Take const_tree.

	* attribs.c (lookup_attribute_spec): Take const_tree.
	* tree.h: Adjust.
	* c-family/c-common.c (attribute_takes_identifier_p): Add missing const.

From-SVN: r170887

gcc/ChangeLog

+2011-03-11  Jason Merrill  <jason@redhat.com>
+
+	* attribs.c (lookup_attribute_spec): Take const_tree.
+	* tree.h: Adjust.
+
 2011-03-11  Joseph Myers  <joseph@codesourcery.com>
 
 	* config/sparc/sparc.c (sparc_option_override): Use

gcc/attribs.c

@@ -208,7 +208,7 @@ register_attribute (const struct attribute_spec *attr)
 /* Return the spec for the attribute named NAME.  */
 
 const struct attribute_spec *
-lookup_attribute_spec (tree name)
+lookup_attribute_spec (const_tree name)
 {
   struct substring attr;
 

gcc/c-family/ChangeLog

 2011-03-11  Jason Merrill  <jason@redhat.com>
 
+	* c-common.c (attribute_takes_identifier_p): Add missing const.
+
 	PR c++/46803
 	* c-common.c (attribute_takes_identifier_p): Assume that an
 	unknown attribute takes an identifier.

gcc/c-family/c-common.c

@@ -5665,7 +5665,7 @@ c_init_attributes (void)
 bool
 attribute_takes_identifier_p (const_tree attr_id)
 {
-  struct attribute_spec *spec = lookup_attribute_spec (attr_id);
+  const struct attribute_spec *spec = lookup_attribute_spec (attr_id);
   if (spec == NULL)
     /* Unknown attribute that we'll end up ignoring, return true so we
        don't complain about an identifier argument.  */

gcc/tree.h

@@ -5348,7 +5348,7 @@ extern bool must_pass_in_stack_var_size_or_pad (enum machine_mode, const_tree);
 
 /* In attribs.c.  */
 
-extern const struct attribute_spec *lookup_attribute_spec (tree);
+extern const struct attribute_spec *lookup_attribute_spec (const_tree);
 
 /* Process the attributes listed in ATTRIBUTES and install them in *NODE,
    which is either a DECL (including a TYPE_DECL) or a TYPE.  If a DECL,