[PATCH] D30189: [AVX512] Fix EXTRACT_VECTOR_ELT for v2i1/v4i1/v32i1/v64i1 with variable index.

[Elena Demikhovsky via Phabricator via llvm-commits]

delena added inline comments.


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Comment at: lib/Target/X86/X86ISelLowering.cpp:13741
+    unsigned NumElts = VecVT.getVectorNumElements();
+    unsigned VecSize = (NumElts <= 4 ? 128 : 512);
+    MVT ExtVT = MVT::getVectorVT(MVT::getIntegerVT(VecSize/NumElts), NumElts);
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You can extend v8i1 and v16i1 to 128 or 256 or 512.
Is one of the variants is preferable in terms of performance?
If all the same, please leave a comment inside. 


Repository:
  rL LLVM

https://reviews.llvm.org/D30189