[PATCH] D36115: [Loop Vectorize] Block Probability for Predicated Blocks

Hiroshi Inoue via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Tue Aug 1 08:34:17 PDT 2017


inouehrs added inline comments.


================
Comment at: lib/Transforms/Vectorize/LoopVectorize.cpp:350
+  return ((BFI->getBlockFreq(HeaderBB)).getFrequency()) /
+         ((BFI->getBlockFreq(BB)).getFrequency());
+}
----------------
Don't you need to handle the case of zero frequency (e.g. if BFI is not available) to avoid divide-by-zero?


https://reviews.llvm.org/D36115





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