lib/CodeGen/IfConversion.cpp

209     void CopyAndPredicateBlock(BBInfo &ToBBI, BBInfo &FromBBI,
212     void MergeBlocks(BBInfo &ToBBI, BBInfo &FromBBI, bool AddEdges = true);
1524 void IfConverter::CopyAndPredicateBlock(BBInfo &ToBBI, BBInfo &FromBBI,
1529   for (MachineBasicBlock::iterator I = FromBBI.BB->begin(),
1530          E = FromBBI.BB->end(); I != E; ++I) {
1563     std::vector<MachineBasicBlock *> Succs(FromBBI.BB->succ_begin(),
1564                                            FromBBI.BB->succ_end());
1565     MachineBasicBlock *NBB = getNextBlock(FromBBI.BB);
1566     MachineBasicBlock *FallThrough = FromBBI.HasFallThrough ? NBB : NULL;
1577   std::copy(FromBBI.Predicate.begin(), FromBBI.Predicate.end(),
1581   ToBBI.ClobbersPred |= FromBBI.ClobbersPred;
1590 /// i.e., when FromBBI's branch is being moved, add those successor edges to
1592 void IfConverter::MergeBlocks(BBInfo &ToBBI, BBInfo &FromBBI, bool AddEdges) {
1593   assert(!FromBBI.BB->hasAddressTaken() &&
1597                    FromBBI.BB, FromBBI.BB->begin(), FromBBI.BB->end());
1599   std::vector<MachineBasicBlock *> Succs(FromBBI.BB->succ_begin(),
1600                                          FromBBI.BB->succ_end());
1601   MachineBasicBlock *NBB = getNextBlock(FromBBI.BB);
1602   MachineBasicBlock *FallThrough = FromBBI.HasFallThrough ? NBB : NULL;
1609     FromBBI.BB->removeSuccessor(Succ);
1614   // Now FromBBI always falls through to the next block!
1615   if (NBB && !FromBBI.BB->isSuccessor(NBB))
1616     FromBBI.BB->addSuccessor(NBB);
1618   std::copy(FromBBI.Predicate.begin(), FromBBI.Predicate.end(),
1620   FromBBI.Predicate.clear();
1622   ToBBI.NonPredSize += FromBBI.NonPredSize;
1623   ToBBI.ExtraCost += FromBBI.ExtraCost;
1624   ToBBI.ExtraCost2 += FromBBI.ExtraCost2;
1625   FromBBI.NonPredSize = 0;
1626   FromBBI.ExtraCost = 0;
1627   FromBBI.ExtraCost2 = 0;
1629   ToBBI.ClobbersPred |= FromBBI.ClobbersPred;
1630   ToBBI.HasFallThrough = FromBBI.HasFallThrough;
1632   FromBBI.IsAnalyzed = false;