extern tree build_int_cst_wide (tree, unsigned HOST_WIDE_INT, HOST_WIDE_INT);
extern tree build_int_cst_wide_type (tree,
unsigned HOST_WIDE_INT, HOST_WIDE_INT);
extern tree build_int_cst_wide (tree, unsigned HOST_WIDE_INT, HOST_WIDE_INT);
extern tree build_int_cst_wide_type (tree,
unsigned HOST_WIDE_INT, HOST_WIDE_INT);