[PATCH] D140993: [DAGCombine] fold (sext (sext_inreg x)) -> (sext (trunc x))

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix added a comment.

Yes, it shouldn't in itself, but throw another transform in the loop, and it may well be.

Is there another approach you are thinking of? I thought about doing just `(sext (sext_inreg (trunc x))) -> (sext (trunc x))` but that seemed too topical.


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