+/**
+ * Enable/Disable if conversion.
+ *
+ * If conversion tries to turn Conds into Mux nodes to eliminate
+ * control flow.
+ */
+void set_opt_if_conversion(int value);
+
+/**
+ * Enable/Disable real function call optimization.
+ *
+ * Real function call optimization detects "real functions" and
+ * allows the floating of Call nodes. A "real function" is one that
+ * do only evaluate it's parameters and did not read or write memory
+ * to compute its results.
+ */
+void set_opt_real_function_call(int value);
+
+/**
+ * Enable/Disable Confirm node removal during local optimization.
+ */
+void set_opt_remove_confirm(int value);
+
+/**
+ * Enable/Disable scalar replacement optimization.
+ */
+void set_opt_scalar_replacement(int value);
+void set_opt_scalar_replacement_verbose(int value);
+
+/**
+ * Enable/Disable Null exception in Load and Store nodes only.
+ *
+ * If enabled, only Null pointer exception can occur at Load and
+ * store nodes. If it can be proved that the address input of these
+ * nodes is non-null, the exception edge can safely be removed.
+ * If disabled, other exceptions (like unaligned access, read-only memory,
+ * etc.) can occur.
+ *
+ * This flag is enabled by default.
+ */
+void set_opt_ldst_only_null_ptr_exceptions(int value);
+
+/**
+ * Enable/Disable Selection based Null pointer check elimination.
+ *
+ * In languages, where all addresses are always Sel nodes, Null
+ * pointers can only occur as input to Sel nodes.
+ * If Null pointers are the only source for exceptions in Load and
+ * Store nodes (as typical in high level languages), we can eliminate
+ * exception edges from Load and Store when can prove that the Sel
+ * nodes representing the Load/Store address have non-null inputs.
+ * Enabling this flag enables this elimination.
+ *
+ * Enabling this flag is meaningless if ldst_non_null_exceptions is
+ * enabled.
+ *
+ * This flags should be set for Java style languages.
+ */
+void set_opt_sel_based_null_check_elim(int value);