[PATCH] D158201: [DAG] Fold insert_subvector undef, (extract_subvector X, 0), 0 with non-matching types

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:25610
+    if (auto *N2C = dyn_cast<ConstantSDNode>(N2);
+        N2C && N2C->isZero() &&
+        VT.isScalableVector() == SrcVT.isScalableVector()) {
----------------
isNullConstant(N2)


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D158201/new/

https://reviews.llvm.org/D158201