[PATCH] D45723: [X86] Lowering SAD (sum of absolute differences) intrinsics to native IR (LLVM side)

Craig Topper via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Apr 18 15:25:38 PDT 2018


craig.topper added a comment.

How much value are we getting out of this change? Does this expose a lot of optimization potential to the middle end? This is a pretty complex sequence. How easy/likely is for the middle end to mess this up and make it hard for the backend to recognize?


https://reviews.llvm.org/D45723





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