[llvm] [CodeGenPrepare] Consider target memory intrinics as memory use (PR #159638)

[Jeffrey Byrnes via llvm-commits]

jrbyrnes wrote:

> Can you precommit the test case so we can see what effect your patch has on it?

Done . The main effect is to fold in Addressing Mode values (e.g. constant offsets) when a intrinsic doing a mem op is using the same address as some other mem op.

https://github.com/llvm/llvm-project/pull/159638