[llvm] [InstCombine] Remove some of the complexity-based canonicalization (PR #91185)

[via llvm-commits]

goldsteinn wrote:

The `freeze` reassos and vectorization change I think deserve a closer look. Otherwise just seems like some misc regressions in `InstCombine` none of which seems like a huge deal (Maybe the `B == (B & A) & D == (D & A)` case is important).

@dtcxzyw am I reading it right that you had no diff in your benchmarks? That seems surprising...

https://github.com/llvm/llvm-project/pull/91185