llvm-project

6afe5e5d - [LV][EVL] Peek through combination tail-folded + predicated masks (#133430)

[LV][EVL] Peek through combination tail-folded + predicated masks (#133430) If a recipe was predicated and tail folded at the same time, it will have a mask like EMIT vp<%header-mask> = icmp ule canonical-iv, backedge-tc EMIT vp<%mask> = logical-and vp<%header-mask>, vp<%pred-mask> When converting to an EVL recipe, if the mask isn't exactly just the header-mask we copy the whole logical-and. We can remove this redundant logical-and (because it's now covered by EVL) and just use vp<%pred-mask> instead. This lets us remove the widened canonical IV in more places.