[PATCH] D119679: [SLP] Prohibit vectorization of externally used intermediate insertelements

[Alexey Bataev via Phabricator via llvm-commits]

ABataev added inline comments.


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Comment at: llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp:4046
 
+      // Prohibit external uses for intermediate inserts
+      // TODO: this could be allowed by shuffling vectorized value
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I would try to do this a bit earlier and simpler. Before calling `tryToVectorizePair` (or something like this) it is just enough to check that one of the instructions is insertelement. And just do not try vectorization in this case.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D119679/new/

https://reviews.llvm.org/D119679