[PATCH] D118058: [SelectionDAG][VP] Provide expansion for VP_MERGE

[Fraser Cormack via Phabricator via llvm-commits]

frasercrmck added a comment.

I haven't done much work in expansions so don't know exactly how/when best to check to unroll. For example, I didn't want to check whether `VSELECT` was marked as `Expand` because we rely on that expansion. But if the VSELECT were to unroll then arguably VP_MERGE should unroll.. So should the expansion of VP_MERGE duplicate logic that should be internal to ExpandVSELECT?


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https://reviews.llvm.org/D118058