+ FS_OPT_GVN_FOLLOWER, /**< GVN-PRE: replaced a follower */
+ FS_OPT_GVN_FULLY, /**< GVN-PRE: replaced by fully redundant value */
+ FS_OPT_GVN_PARTLY, /**< GVN-PRE: replaced by partly redundant value */
+ FS_OPT_COMBO_CONST, /**< Combo: evaluated into Constant */
+ FS_OPT_COMBO_CF, /**< Combo: removed conditional control flow */
+ FS_OPT_COMBO_FOLLOWER, /**< Combo: replaced a follower */
+ FS_OPT_COMBO_CONGRUENT, /**< Combo: replaced by congruent */
+ FS_OPT_JUMPTHREADING, /**< Jump threading: removed conditional control flow */