[llvm] [SelectOpt] Optimise big select groups in the latch of a non-inner loop to branches (PR #119728)

[Igor Kirillov via llvm-commits]

igogo-x86 wrote:

You can look at the test. SelectGroup consists of  6 instructions at the beginning of the latch, and the latch has 12 instructions in total. It doesn't look like a small latch to me.

https://github.com/llvm/llvm-project/pull/119728