352         LoopHeaders.erase(&BB);  in runImpl()
369             !LoopHeaders.count(&BB) && !LoopHeaders.count(Succ) &&  in runImpl()
382   LoopHeaders.clear();  in runImpl()
531     LoopHeaders.insert(Edge.second);  in findLoopHeaders()
756     if (PN && PN->getParent() == BB && !LoopHeaders.contains(BB)) {  in computeValueKnownInPredecessorsImpl()
1546   if (LoopHeaders.count(BB))  in processThreadableEdges()
1685                return LoopHeaders.contains(PredToDest.second);  in processThreadableEdges()
1900   if (LoopHeaders.erase(SinglePred))  in maybeMergeBasicBlockIntoOnlyPred()
1901     LoopHeaders.insert(BB);  in maybeMergeBasicBlockIntoOnlyPred()
2172   if (LoopHeaders.count(PredBB))  in maybethreadThroughTwoBasicBlocks()
2224   if (LoopHeaders.count(BB) || LoopHeaders.count(SuccBB)) {  in maybethreadThroughTwoBasicBlocks()
2226       bool BBIsHeader = LoopHeaders.count(BB);  in maybethreadThroughTwoBasicBlocks()
2227       bool SuccIsHeader = LoopHeaders.count(SuccBB);  in maybethreadThroughTwoBasicBlocks()
2345   if (LoopHeaders.count(BB) || LoopHeaders.count(SuccBB)) {  in tryThreadEdge()
2347       bool BBIsHeader = LoopHeaders.count(BB);  in tryThreadEdge()
2348       bool SuccIsHeader = LoopHeaders.count(SuccBB);  in tryThreadEdge()
2377   assert(!LoopHeaders.count(BB) && !LoopHeaders.count(SuccBB) &&  in threadEdge()
2624   if (LoopHeaders.count(BB)) {  in duplicateCondBranchOnPHIIntoPred()
2921   if (LoopHeaders.count(BB))  in tryToUnfoldSelectInCurrBB()