[llvm] [CodeGen] Guard copy propagation in machine CSE against undefs (PR #97413)

[Vikram Hegde via llvm-commits]

vikramRH wrote:

> lgtm with nit. Also still would like to the sample IR that got here, it probably should not happen for anything well formed

https://godbolt.org/z/K7fPTq8zc (This is the optimized version of divergent i64 atomic add).

https://github.com/llvm/llvm-project/pull/97413