Commit 16a357f6 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86] combineX86ShufflesRecursively - peek through insert_subvector(undef, x,...

[X86] combineX86ShufflesRecursively - peek through insert_subvector(undef, x, 0) vector widening nodes

If the node is inert then just peek through it and canonicalize the shuffle mask to ensure any referenced upper elements are set to undef.
parent 1b254022
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