SiFive's U74 (found in the VisionFive 2, Star64, PineTab-V, Milk-V Mars) does this. The conditional branch travels down pipe A, the following instruction down p

SiFive's U74 (found in the VisionFive 2, Star64, PineTab-V, Milk-V Mars) does this. The conditional branch travels down pipe A, the following instruction down pipe B. If the conditional branch turns out to be taken then the instruction in pipe B is NOP'd rather than taking a branch mispredict.