+#include "proc_cloning.h" /* procedure cloning */
+#include "opt_confirms.h" /* Confirm based optimizations */
+#include "gvn_pre.h" /* global value numbering and partial redundancy elimination */
+#include "opt_frame.h" /* frame type optimization */
+#include "tropt.h" /* optimize the type representation */
+#include "condeval.h" /* control flow optimization by conditional evaluation */
+
+/* Lowering */
+#include "lower_calls.h" /* lowering of different calls */
+#include "lower_intrinsics.h" /* lowering of intrinsic calls */
+#include "lower_dw.h" /* double word types lowering */