[llvm] [MemCpyOpt] Forward `memcpy` based on the actual copy memory location. (PR #87190)

[via llvm-commits]

DianQK wrote:

> Test the compile time for llvm#87190 rust-lang/rust#127514

Currently, only the results related to compile time are relatively accurate: https://github.com/rust-lang/rust/pull/127514#issuecomment-2218708853.

https://github.com/llvm/llvm-project/pull/87190