[PATCH] D73181: [SCEV] Use backedge SCEV of PHI only if its input is loop invariant

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added inline comments.


================
Comment at: llvm/lib/Analysis/ScalarEvolution.cpp:8253
+            const SCEV *OnBackedge = getSCEV(BackedgeVal);
+            if (IsLoopInvariantValue(BackedgeVal, LI))
               return OnBackedge;
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Why not just `LI->isLoopInvariant(BackedgeVal)`?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D73181/new/

https://reviews.llvm.org/D73181