[llvm] [EarlyIfConverter] Fix reg killed twice after early-if-predicator and ifcvt (PR #133554)

[Afanasyev Ivan via llvm-commits]

ivafanas wrote:

Please, note, that I do not have commit access.

If you find this patch is ok, could you please merge to PR?

https://github.com/llvm/llvm-project/pull/133554