[PATCH] D44676: [SCEV] Make exact taken count calculation more optimistic
Florian Hahn via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Mar 22 15:50:03 PDT 2018
fhahn added inline comments.
================
Comment at: lib/Analysis/ScalarEvolution.cpp:6657
/// computable result can only be returned for loops with a single exit.
/// Returning the minimum taken count among all exits is incorrect because one
/// of the loop's exit limit's may have been skipped. howFarToZero assumes that
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Please also update the comment here, stating when multiple exits are OK.
https://reviews.llvm.org/D44676
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