[llvm] [X86][CostModel] Estimate the codesize cost of switch (PR #163569)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

Would it make sense to include this in TargetTransformInfoImpl::getCFInstrCost() instead? The logic isn't really X86 specific.

It looks like a lot of targets just unnecessarily implement this method, with an implementation that is equivalent to the default one.

https://github.com/llvm/llvm-project/pull/163569