[PATCH] D107766: [AggressiveInstCombine] Add shift instructions to `TruncInstCombine` DAG

[Anton Afanasyev via Phabricator via llvm-commits]

anton-afanasyev added a comment.

In D107766#2945525 <https://reviews.llvm.org/D107766#2945525>, @lebedev.ri wrote:

> That is kind of my point.
> At least the left and right shifts have different legality rules,
> and different right-shifts also have slightly different rules.
> Not having to deal with everything at once will strictly simplify review.

Ok, start from `shl`: https://reviews.llvm.org/D108091


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https://reviews.llvm.org/D107766