[PATCH] D24625: [DAG] Remove isVectorClearMaskLegal() check from vector_build dagcombine

[Simon Pilgrim via llvm-commits]

RKSimon added a comment.

I agree that the UsesZeroVector test shouldn't be there but we should probably use a TLI.isShuffleMaskLegal(Mask, InVT1) test and not just blindly combine to a shuffle.


https://reviews.llvm.org/D24625