[llvm] [VPlan] First step towards VPlan cost modeling. (PR #92555)

[Florian Hahn via llvm-commits]

fhahn wrote:

@alexhf is it possible the test case is over-reduced? I can reproduce the crash (with assertions, it triggers an assertion), but it is due to a dead load. Would it be possible to get a reproducer also without dead instructions? 



https://github.com/llvm/llvm-project/pull/92555