Transforms/Utils/FlattenCFG.cpp

194     BasicBlock *PS2 = PBI->getSuccessor(1);
195     BasicBlock *PS = (PS1 == BB) ? PS2 : PS1;
223   BasicBlock *PS2 = TBB->getSuccessor(1);
225   BranchInst *PBI2 = dyn_cast<BranchInst>(PS2->getTerminator());
227   // If PS1 does not jump into PS2, but PS2 jumps into PS1,
230       (PS1->getTerminator()->getSuccessor(0) != PS2)) {
231     // Check whether PS2 jumps into PS1.
233         (PS2->getTerminator()->getSuccessor(0) != PS1))
260   // PS2 should not contain PHI node.
261   PHI = dyn_cast<PHINode>(PS2->begin());