[PATCH] D30866: [X86] Recognize AVX2 gather instructions during lowering so we can modify the source input when the mask is all ones

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

Looks like we only add xor for partial dependency breaking if the instruction is listed in hasUndefRegUpdate in X86InstrInfo.cpp and our first response it to use the same register as one of the other input operands, but that would be illegal for gather.


https://reviews.llvm.org/D30866