[PATCH] D98240: [VectorCombine] Simplify to scalar store if only one element updated

[Florian Hahn via Phabricator via llvm-commits]

fhahn added inline comments.


================
Comment at: llvm/lib/Transforms/Vectorize/VectorCombine.cpp:795
+             m_InsertElt(m_Instruction(Source), m_Value(NewElement),
+                         m_Constant(Idx))))
+    return false;
----------------
Why only allow constants here? If the index is a non-constant, it should be even more profitable, because most targets probably do not have instructions to insert at a variable index.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D98240/new/

https://reviews.llvm.org/D98240