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Revert "[NFCI][LoopDeletion] Do not call complex analysis for known non-zero BTC" 

This reverts commit 7d418dadf6.
This commit is contained in:
Stefan Pintilie 2021-05-28 11:17:46 -05:00
parent 403cfe5d70
commit dd226803c2
1 changed files with 0 additions and 2 deletions
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2
llvm/lib/Transforms/Scalar/LoopDeletion.cpp
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@ -314,8 +314,6 @@ breakBackedgeIfNotTaken(Loop *L, DominatorTree &DT, ScalarEvolution &SE,
return LoopDeletionResult::Unmodified;
auto *BTC = SE.getBackedgeTakenCount(L);
if (!isa<SCEVCouldNotCompute>(BTC) && SE.isKnownNonZero(BTC))
return LoopDeletionResult::Unmodified;
if (!BTC->isZero() && !canProveExitOnFirstIteration(L, DT, SE, LI))
return LoopDeletionResult::Unmodified;