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

[Zhaoxuan Jiang via llvm-commits]

nocchijiang wrote:

@mstorsjo @sjoerdmeijer @fhahn @MeeraN7 

Since I don't have commit access, please help add reviewers for me and take a look at the PR when you are free. Thanks!

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