[PATCH] D137433: [DAG] Add canonicalization to avoid redundant nots in concat vectors

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:21649
+    SDValue N1 = N->getOperand(1);
+    if (N0->getOpcode() == ISD::TRUNCATE && N1->getOpcode() == ISD::TRUNCATE) {
+      auto isBitwiseVectorNegate = [](SDValue V) {
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hasOneUse (or N->isOnlyUserOf()) checks?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D137433/new/

https://reviews.llvm.org/D137433