[llvm] [ARM] Stop gluing ALU nodes to branches / selects (PR #116970)

[Sergei Barannikov via llvm-commits]

s-barannikov wrote:

There are three functions under suspicion: `get_zero_bits_limit`, `set_protection`, and `fill_basic_memory_info`.
The first one changed the most, but if I manually reduced it correctly, it is not the one containing the faulty code.
The two others have similar changes like this:
![image](https://github.com/user-attachments/assets/7acea34d-641a-4de6-92f7-de3789d652f0)
This looks suspicious, but needs further analysis.


https://github.com/llvm/llvm-project/pull/116970