[llvm] [Value] Look through inttoptr (add ..) in accumulateConstantOffsets (PR #124981)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

I briefly tried to come up with a tests where the result would be used incorrectly, but wasn't able to.

I added a new `LookThroughIntToPtr` flag.

https://github.com/llvm/llvm-project/pull/124981