llvm-project

512ef4c7 - [X86] Fold VPERMV(MASK,CONCAT(LO,HI)) -> VPERMV3(WIDEN(LO),MASK',WIDEN(HI)) (#129708)

[X86] Fold VPERMV(MASK,CONCAT(LO,HI)) -> VPERMV3(WIDEN(LO),MASK',WIDEN(HI)) (#129708) If the VPERMV node is shuffling a source that is concatenated from separate subvectors, attempt to shuffle from the separate subvectors directly using an equivalent VPERMV3 node