[PATCH] D65884: [ARM] MVE Tail Predication

[Sjoerd Meijer via Phabricator via llvm-commits]

SjoerdMeijer added inline comments.


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Comment at: lib/Target/ARM/MVETailPredication.cpp:364
+  // Search for Elems in the following SCEV:
+  // (1 + ((-VF + (VF * (((VF - 1) + %Elems) /u VF))<nuw>) /u VF))<nuw><nsw>
+  const SCEV *Elems = nullptr;
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What we are doing here, is looking at generated code to get `%Elems`. But the vectorizer has generated this code, so somewhere this knowledge is present. The only question is, I guess, how easily accessible. Can we query SCEV or something else to avoid this pattern matching?


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  https://reviews.llvm.org/D65884/new/

https://reviews.llvm.org/D65884