[llvm] Revert 112e49b38150b8bfdef01434309d1b05204193e4 due to a miscompile (PR #71598)

[Simon Pilgrim via llvm-commits]

RKSimon wrote:

@alexfh Hadn't @goldsteinn identified that #71489 was the fix to the underlying issue? Did that patch address the miscompiles you were seeing?

https://github.com/llvm/llvm-project/pull/71598