[llvm] [VPlan] Extract reverse mask from reverse accesses (PR #155579)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

I think one case where we get different costs now (and have an assertion triggered with the change) is https://github.com/llvm/llvm-project/blob/main/llvm/test/Transforms/LoopVectorize/RISCV/predicated-reverse-store.ll

Not looked in detail yet why we miss this case



https://github.com/llvm/llvm-project/pull/155579