[PATCH] D41811: X86: Add pattern matching for PMADDWD

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: lib/CodeGen/SelectionDAG/DAGCombiner.cpp:8780
 
+  if (N0.getOpcode() == ISD::EXTRACT_SUBVECTOR) {
+    SDValue N00 = N0.getOperand(0);
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Add comment describing the combine - any chance that you can add additional tests for this?


https://reviews.llvm.org/D41811