[llvm] [InstCombine] Missed optimization: Fold (sext(a) & c1) == c2 to (a & c3) == trunc(c2) (PR #112646)

[via llvm-commits]

goldsteinn wrote:

> ping @goldsteinn

Need to fixup tests:

```
Failed Tests (4):
  LLVM :: Transforms/InstCombine/load-cmp.ll
  LLVM :: Transforms/LoopVectorize/X86/float-induction-x86.ll
  LLVM :: Transforms/PhaseOrdering/AArch64/extra-unroll-simplifications.ll
  LLVM :: Transforms/PhaseOrdering/X86/vdiv.ll

```

https://github.com/llvm/llvm-project/pull/112646