[PATCH] D147355: [LV] Optimize trip count SCEV.

[Nikita Popov via Phabricator via llvm-commits]

nikic added a comment.

This seems like basically the same change as D147117 <https://reviews.llvm.org/D147117>, but in a different place. It would be nice if every place computing a trip count from a BE count didn't reimplement this.



================
Comment at: llvm/lib/Transforms/Vectorize/LoopVectorize.cpp:1002
+          OrigLoop, ICmpInst::ICMP_NE, BackedgeTakenCount,
+          SE.getNegativeSCEV(SE.getOne(BackedgeTakenCount->getType())))) {
+    return SE.getZeroExtendExpr(
----------------
Can use SE.getMinusOne() here.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D147355/new/

https://reviews.llvm.org/D147355