diff options
| -rw-r--r-- | llvm/lib/Analysis/ScalarEvolution.cpp | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp index 98c2845c1e6..8e60ca01c02 100644 --- a/llvm/lib/Analysis/ScalarEvolution.cpp +++ b/llvm/lib/Analysis/ScalarEvolution.cpp @@ -6414,11 +6414,9 @@ ScalarEvolution::getBackedgeTakenInfo(const Loop *L) { SmallVector<Instruction *, 16> Worklist; PushLoopPHIs(L, Worklist); - SmallPtrSet<Instruction *, 8> Visited; + SmallPtrSet<Instruction *, 8> Discovered; while (!Worklist.empty()) { Instruction *I = Worklist.pop_back_val(); - if (!Visited.insert(I).second) - continue; ValueExprMapType::iterator It = ValueExprMap.find_as(static_cast<Value *>(I)); @@ -6460,7 +6458,8 @@ ScalarEvolution::getBackedgeTakenInfo(const Loop *L) { for (auto *U : I->users()) if (auto *I = dyn_cast<Instruction>(U)) { auto *LoopForUser = LI.getLoopFor(I->getParent()); - if (LoopForUser && L->contains(LoopForUser)) + if (LoopForUser && L->contains(LoopForUser) && + Discovered.insert(I).second) Worklist.push_back(I); } } |
