[llvm] [AArch64] Allow LDR merge with same destination register by renaming (PR #71908)

[David Green via llvm-commits]

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

Thanks. Whenever we try these kind of things there seems to often be a high chance of problems occurring. Please make sure you have tested thoroughly, but from what I can tell this LGTM.

https://github.com/llvm/llvm-project/pull/71908