[llvm] Select binop with immediates optimization (PR #212163)

[Keith Dunwoody via llvm-commits]

keithdunwoody wrote:

@yingopq I've edited the title, is that clearer?  If not, can you elaborate on how you suggest clarifying?  I'll admit it isn't the clearest, but I can't think of a better concise description.

https://github.com/llvm/llvm-project/pull/212163