[llvm] [InstCombine] Simplify zext(sub(0, trunc(x))) -> and(sub(0, x), mask) (Fixes #165306) (PR #167101)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> In my test case, the types are i6 (Source) and i64 (Destination). It seems shouldChangeType returns false for this

It is a bit strange to me. What is the datalayout you use?


https://github.com/llvm/llvm-project/pull/167101