[PATCH] D14840: [X86] Detect SAD patterns and emit psadbw instructions on X86.

[Simon Pilgrim via llvm-commits]

RKSimon added a comment.

Minor clanup request.

Also, can you get rid of the stack instructions in the test (nounwind?)


================
Comment at: lib/Target/X86/X86ISelLowering.cpp:29090
@@ +29089,3 @@
+  SmallVector<SDValue, 16> Ops(
+      NumConcat, DAG.getConstant(0, DL, Op0.getOperand(0).getValueType()));
+  Ops[0] = Op0.getOperand(0);
----------------
DAG.getConstant(0, DL, InVT)


http://reviews.llvm.org/D14840