[llvm] [DAG] Fixing the non-optimal code with the following: `select i1 %0, float 1.0, float 0.0`. (PR #107732)

[via llvm-commits]

c8ef wrote:

It appears that the newly added function may cause an infinite loop and some regression with kmov.

![image](https://github.com/user-attachments/assets/a3497b20-33fc-4a60-aa20-95c7b2ad0359)

https://github.com/llvm/llvm-project/pull/107732