120 /// \returns true if \p BB is reachable through only uniform branches.
122 static bool isUniformlyReached(const UniformityInfo &UA, BasicBlock &BB) {  in isUniformlyReached()  argument
123   SmallVector<BasicBlock *, 8> Stack(predecessors(&BB));  in isUniformlyReached()
163   for (BasicBlock *BB : ReturningBlocks) {  in unifyReturnBlockSet()
167       PN->addIncoming(BB->getTerminator()->getOperand(0), BB);  in unifyReturnBlockSet()
170     BB->getTerminator()->eraseFromParent();  in unifyReturnBlockSet()
171     BranchInst::Create(NewRetBlock, BB);  in unifyReturnBlockSet()
172     Updates.emplace_back(DominatorTree::Insert, BB, NewRetBlock);  in unifyReturnBlockSet()
179   for (BasicBlock *BB : ReturningBlocks) {  in unifyReturnBlockSet()
181     simplifyCFG(BB, *TTI, RequireAndPreserveDomTree ? &DTU : nullptr,  in unifyReturnBlockSet()
216       PDT.roots(), [&](auto BB) { return !isUniformlyReached(UA, *BB); });  in run()  argument
218   for (BasicBlock *BB : PDT.roots()) {  in run()
219     if (isa<ReturnInst>(BB->getTerminator())) {  in run()
221         ReturningBlocks.push_back(BB);  in run()
222     } else if (isa<UnreachableInst>(BB->getTerminator())) {  in run()
224         UnreachableBlocks.push_back(BB);  in run()
225     } else if (BranchInst *BI = dyn_cast<BranchInst>(BB->getTerminator())) {  in run()
241         BranchInst::Create(LoopHeaderBB, DummyReturnBB, BoolTrue, BB);  in run()
242         Updates.emplace_back(DominatorTree::Insert, BB, DummyReturnBB);  in run()
244         SmallVector<BasicBlock *, 2> Successors(successors(BB));  in run()
247         BasicBlock *TransitionBB = BB->splitBasicBlock(BI, "TransitionBlock");  in run()
251         // 'Successors' become successors of TransitionBB instead of BB,  in run()
252         // and TransitionBB becomes a single successor of BB.  in run()
253         Updates.emplace_back(DominatorTree::Insert, BB, TransitionBB);  in run()
256           Updates.emplace_back(DominatorTree::Delete, BB, Successor);  in run()
261         BB->getTerminator()->eraseFromParent();  in run()
262         BranchInst::Create(TransitionBB, DummyReturnBB, BoolTrue, BB);  in run()
263         Updates.emplace_back(DominatorTree::Insert, BB, DummyReturnBB);  in run()
280       for (BasicBlock *BB : UnreachableBlocks) {  in run()
282         BB->getTerminator()->eraseFromParent();  in run()
283         BranchInst::Create(UnreachableBlock, BB);  in run()
284         Updates.emplace_back(DominatorTree::Insert, BB, UnreachableBlock);  in run()