[llvm] [LV][RFC] Generating conditional VPBB that will be skip when the mask is inactive in VPlan. (PR #141900)

[Elvis Wang via llvm-commits]

ElvisWang123 wrote:

> @ElvisWang123 @vzakhari is there still a crash with this version as mentioned in #157542?

It seems that the issue is disappear after rebasing. Probably fixed  (masked) by cost model updating.
I've add the cost of the `AnyOf` generated by conditional VPBB to the legacy cost model to fix the potential cost model misaligned in 

https://github.com/llvm/llvm-project/pull/141900