[PATCH] D148347: [AArch64] Handle vector with two different values

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

Instead of special-casing this specific pattern, maybe it makes sense to generalize to all BUILD_VECTORs with two values?  Even for a completely arbitrary shuffle, you can still lower that to 5 instructions: VSELECT mask, DUP op1, DUP op2.


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  https://reviews.llvm.org/D148347/new/

https://reviews.llvm.org/D148347