[PATCH] D123234: [X86] `lowerBuildVectorAsBroadcast()`: with AVX2, allow i64->XMM broadcasts from constant pool

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

Hm, so we already have cases where we fail to undo broadcast load into a folded load (https://godbolt.org/z/3jzEd91ca), so i'm still unsure if that is a blocker?


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  https://reviews.llvm.org/D123234/new/

https://reviews.llvm.org/D123234