[llvm] [AVR] Fix a bug in selection of ANY_EXTEND (PR #132398)

[Ben Shi via llvm-commits]

benshi001 wrote:

> I've got a hunch this is how AArch64 solves this problem:
> 
> https://github.com/llvm/llvm-project/blob/0d3ba087f706b12a1b091ea5bc5f48876e1ab67c/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp#L6195

Yes. I will make a formal solution later, after I fix issue #127651 .

https://github.com/llvm/llvm-project/pull/132398