[llvm] [GlobalIsel] Combine zext of trunc (episode II) (PR #108305)

[Thorsten Schütt via llvm-commits]

tschuett wrote:

> > I am not sure that it has the `and` combines.
> 
> I haven't found it yet either.

https://github.com/llvm/llvm-project/blob/a4916d200518ac077be93995af18bd80fcb89cc2/llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp#L1237

This is the reason why I am undecided whether this PR is in this version/configuration beneficial or not. And as the author I have zero voting rights.

https://github.com/llvm/llvm-project/pull/108305