tree.c (prototype_p, [...]): Constify.

	* tree.c (prototype_p, virtual_method_call_p, obj_type_ref_class,
	is_typedef_decl, typedef_variant_p): Constify.
	* tree.h (prototype_p, virtual_method_call_p, obj_type_ref_class,
	is_typedef_decl, typedef_variant_p): Constify.

From-SVN: r223628

gcc/ChangeLog

+2015-05-22  Jan Hubicka  <hubicka@ucw.cz>
+
+	* tree.c (prototype_p, virtual_method_call_p, obj_type_ref_class,
+	is_typedef_decl, typedef_variant_p): Constify.
+	* tree.h (prototype_p, virtual_method_call_p, obj_type_ref_class,
+	is_typedef_decl, typedef_variant_p): Constify.
+
 2015-05-23  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
 	* defaults.h (gen_tablejump): New function.

gcc/tree.c

@@ -11579,7 +11579,7 @@ stdarg_p (const_tree fntype)
 /* Return true if TYPE has a prototype.  */
 
 bool
-prototype_p (tree fntype)
+prototype_p (const_tree fntype)
 {
   tree t;
 
@@ -12005,7 +12005,7 @@ lhd_gcc_personality (void)
    can't apply.) */
 
 bool
-virtual_method_call_p (tree target)
+virtual_method_call_p (const_tree target)
 {
   if (TREE_CODE (target) != OBJ_TYPE_REF)
     return false;
@@ -12026,7 +12026,7 @@ virtual_method_call_p (tree target)
 /* REF is OBJ_TYPE_REF, return the class the ref corresponds to.  */
 
 tree
-obj_type_ref_class (tree ref)
+obj_type_ref_class (const_tree ref)
 {
   gcc_checking_assert (TREE_CODE (ref) == OBJ_TYPE_REF);
   ref = TREE_TYPE (ref);
@@ -12124,7 +12124,7 @@ get_binfo_at_offset (tree binfo, HOST_WIDE_INT offset, tree expected_type)
 /* Returns true if X is a typedef decl.  */
 
 bool
-is_typedef_decl (tree x)
+is_typedef_decl (const_tree x)
 {
   return (x && TREE_CODE (x) == TYPE_DECL
           && DECL_ORIGINAL_TYPE (x) != NULL_TREE);
@@ -12133,7 +12133,7 @@ is_typedef_decl (tree x)
 /* Returns true iff TYPE is a type variant created for a typedef. */
 
 bool
-typedef_variant_p (tree type)
+typedef_variant_p (const_tree type)
 {
   return is_typedef_decl (TYPE_NAME (type));
 }

gcc/tree.h

@@ -4375,9 +4375,9 @@ extern int operand_equal_for_phi_arg_p (const_tree, const_tree);
 extern tree create_artificial_label (location_t);
 extern const char *get_name (tree);
 extern bool stdarg_p (const_tree);
-extern bool prototype_p (tree);
-extern bool is_typedef_decl (tree x);
-extern bool typedef_variant_p (tree);
+extern bool prototype_p (const_tree);
+extern bool is_typedef_decl (const_tree x);
+extern bool typedef_variant_p (const_tree);
 extern bool auto_var_in_fn_p (const_tree, const_tree);
 extern tree build_low_bits_mask (tree, unsigned);
 extern bool tree_nop_conversion_p (const_tree, const_tree);
@@ -4544,8 +4544,8 @@ extern location_t *block_nonartificial_location (tree);
 extern location_t tree_nonartificial_location (tree);
 extern tree block_ultimate_origin (const_tree);
 extern tree get_binfo_at_offset (tree, HOST_WIDE_INT, tree);
-extern bool virtual_method_call_p (tree);
-extern tree obj_type_ref_class (tree ref);
+extern bool virtual_method_call_p (const_tree);
+extern tree obj_type_ref_class (const_tree ref);
 extern bool types_same_for_odr (const_tree type1, const_tree type2,
 				bool strict=false);
 extern bool contains_bitfld_component_ref_p (const_tree);