[llvm] [InstCombine] Simplify select using KnownBits of condition (PR #95923)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> @dtcxzyw What metric does this refer to?

It refers to execution time of `opt -O3` (in instruction:u). See also https://github.com/dtcxzyw/llvm-opt-benchmark/issues/680.



https://github.com/llvm/llvm-project/pull/95923