[llvm] [LangRef] Specify icmp on pointers to only compare address (PR #163936)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw approved this pull request.

LangRef changes look reasonable. I'd leave the AMDGPU part to be checked by its maintainers.

It reminds me that we still use pointer size in computeKnownBits. It should be changed to use the address size.


https://github.com/llvm/llvm-project/pull/163936