[llvm] [TTI][CostModel] Add cost modeling for expandload and compressstore intrinsics (PR #122882)

[Philip Reames via llvm-commits]

https://github.com/preames commented:

>From just a quick look at the x86 codegen tests, I don't think the cost proposed here actually matches the lowering.

Can you take a step back and explain why you're doing this?  At the moment, the only thing I can find in tree which creates these is the sanitizers?  

https://github.com/llvm/llvm-project/pull/122882