[PATCH] D90092: [AVR] Optimize 16-bit int shift

[Ayke via Phabricator via llvm-commits]

aykevl added a comment.

See my comment D89047#2366709 <https://reviews.llvm.org/D89047#2366709>.
I think this optimization would be implemented better in SelectionDAG instead of using pseudo-instructions. That would also make it possible to optimize things like `(short)x << 12`.


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