Hi Naveen, > https://gcc.gnu.org/ml/gcc-patches/2017-03/msg01369.html
Same comment for this part, we want to return true if we match: + if (SET_DEST (curr_set) != (pc_rtx) + || GET_CODE (SET_SRC (curr_set)) != IF_THEN_ELSE + || ! REG_P (XEXP (XEXP (SET_SRC (curr_set), 0), 0)) + || ! REG_P (SET_DEST (prev_set)) + || REGNO (SET_DEST (prev_set)) + != REGNO (XEXP (XEXP (SET_SRC (curr_set), 0), 0))) + return false; Note writing these complex conditions using positive logic makes them much more readable - if you have to negate use !(X && Y && Z) rather than !X || !Y || !Z. Wilco
