lib/CodeGen/BranchFolding.cpp

1094   MachineBasicBlock &PrevBB = *prior(MachineFunction::iterator(MBB));
1099     TII->AnalyzeBranch(PrevBB, PriorTBB, PriorFBB, PriorCond, true);
1102     MadeChange |= PrevBB.CorrectExtraCFGEdges(PriorTBB, PriorFBB,
1109       DebugLoc dl = getBranchDebugLoc(PrevBB);
1110       TII->RemoveBranch(PrevBB);
1113         TII->InsertBranch(PrevBB, PriorTBB, 0, PriorCond, dl);
1124     // This has to check PrevBB->succ_size() because EH edges are ignored by
1127         PrevBB.succ_size() == 1 &&
1129       DEBUG(dbgs() << "\nMerging into block: " << PrevBB
1132       if (PrevBB.begin() != PrevBB.end()) {
1133         MachineBasicBlock::iterator PrevBBIter = PrevBB.end();
1136         // Check if DBG_VALUE at the end of PrevBB is identical to the
1138         while (PrevBBIter != PrevBB.begin() && MBBIter != MBB->end()
1147       PrevBB.splice(PrevBB.end(), MBB, MBB->begin(), MBB->end());
1148       PrevBB.removeSuccessor(PrevBB.succ_begin());
1149       assert(PrevBB.succ_empty());
1150       PrevBB.transferSuccessors(MBB);
1158       TII->RemoveBranch(PrevBB);
1167       DebugLoc dl = getBranchDebugLoc(PrevBB);
1168       TII->RemoveBranch(PrevBB);
1169       TII->InsertBranch(PrevBB, PriorTBB, 0, PriorCond, dl);
1181         DebugLoc dl = getBranchDebugLoc(PrevBB);
1182         TII->RemoveBranch(PrevBB);
1183         TII->InsertBranch(PrevBB, PriorFBB, 0, NewPriorCond, dl);
1219           DebugLoc dl = getBranchDebugLoc(PrevBB);
1220           TII->RemoveBranch(PrevBB);
1221           TII->InsertBranch(PrevBB, MBB, 0, NewPriorCond, dl);
1291         bool PredHasNoFallThrough = !PrevBB.canFallThrough();
1293             !PrevBB.isSuccessor(MBB)) {
1296           if (!PredHasNoFallThrough && PrevBB.isSuccessor(MBB) &&
1306             DebugLoc pdl = getBranchDebugLoc(PrevBB);
1307             TII->RemoveBranch(PrevBB);
1308             TII->InsertBranch(PrevBB, PriorTBB, PriorFBB, PriorCond, pdl);
1362   if (!PrevBB.canFallThrough()) {
1431           !TII->AnalyzeBranch(PrevBB, PrevTBB, PrevFBB, PrevCond, true) &&
1432           PrevBB.isSuccessor(FallThrough)) {