extern struct tree_opt_pass pass_combine;
extern struct tree_opt_pass pass_if_after_combine;
extern struct tree_opt_pass pass_partition_blocks;
+extern struct tree_opt_pass pass_match_asm_constraints;
extern struct tree_opt_pass pass_regmove;
extern struct tree_opt_pass pass_split_all_insns;
extern struct tree_opt_pass pass_lower_subreg2;