[PATCH] D136046: [X86] `DAGTypeLegalizer::ModifyToType()`: when widening w/ zeros, insert into undef and `and`-mask the padding away

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

In D136046#3867004 <https://reviews.llvm.org/D136046#3867004>, @pengfei wrote:

> LGTM.

Thanks!

@RKSimon ?


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