[llvm] [InstCombine] foldOpIntoPhi should apply to icmp with non-constant operand (PR #147676)

[Ross Kirsling via llvm-commits]

rkirsling wrote:

Just wanted to check whether more is needed for this patch—is there a way that I should be looking into the sqlite3 result, or is this considered an acceptable tradeoff?

https://github.com/llvm/llvm-project/pull/147676