Lines Matching defs:Tail

76 //             Tail                       Tail
79 // Head block, and phis in the Tail block are converted to select instructions.
92   MachineBasicBlock *Tail;
101   /// equal to Tail.
102   bool isTriangle() const { return TBB == Tail || FBB == Tail; }
104   /// Returns the Tail predecessor for the True side.
105   MachineBasicBlock *getTPred() const { return TBB == Tail ? Head : TBB; }
107   /// Returns the Tail predecessor for the  False side.
108   MachineBasicBlock *getFPred() const { return FBB == Tail ? Head : FBB; }
110   /// Information about each phi in the Tail block.
159   /// Replace PHI instructions in Tail with selects.
440   TBB = FBB = Tail = nullptr;
454   Tail = Succ0->succ_begin()[0];
457   if (Tail != Succ1) {
460         Succ1->succ_begin()[0] != Tail)
465                       << printMBBReference(*Tail) << '\n');
468     if (!Tail->livein_empty()) {
469       LLVM_DEBUG(dbgs() << "Tail has live-ins.\n");
475                       << printMBBReference(*Tail) << '\n');
481   if (!Predicate && (Tail->empty() || !Tail->front().isPHI())) {
514   for (MachineBasicBlock::iterator I = Tail->begin(), E = Tail->end();
541     if (TBB != Tail && !canPredicateInstrs(TBB))
543     if (FBB != Tail && !canPredicateInstrs(FBB))
546     if (TBB != Tail && !canSpeculateInstrs(TBB))
548     if (FBB != Tail && !canSpeculateInstrs(FBB))
611 /// This is possible when the only Tail predecessors are the if-converted
614   assert(Tail->pred_size() == 2 && "Cannot replace PHIs");
638 /// rewritePHIOperands - When there are additional Tail predecessors, insert
640 /// Keep the PHI instructions in Tail to handle the other predecessors.
685   assert(Head && Tail && TBB && FBB && "Call canConvertIf first.");
694   if (TBB != Tail) {
699   if (FBB != Tail) {
704   // Are there extra Tail predecessors?
705   bool ExtraPreds = Tail->pred_size() != 2;
714   if (TBB != Tail)
715     TBB->removeSuccessor(Tail, true);
716   if (FBB != Tail)
717     FBB->removeSuccessor(Tail, true);
725   // through to Tail, and we can join the two blocks.
726   if (TBB != Tail) {
730   if (FBB != Tail) {
736   if (!ExtraPreds && Head->isLayoutSuccessor(Tail)) {
737     // Splice Tail onto the end of Head.
738     LLVM_DEBUG(dbgs() << "Joining tail " << printMBBReference(*Tail)
740     Head->splice(Head->end(), Tail,
741                      Tail->begin(), Tail->end());
742     Head->transferSuccessorsAndUpdatePHIs(Tail);
743     RemovedBlocks.push_back(Tail);
744     Tail->eraseFromParent();
746     // We need a branch to Tail, let code placement work it out later.
749     TII->insertBranch(*Head, Tail, nullptr, EmptyCond, HeadDL);
750     Head->addSuccessor(Tail);
811   // convertIf can remove TBB, FBB, and Tail can be merged into Head.
813   // Tail children should be transferred to Head.
819       assert(Node->getBlock() == IfConv.Tail && "Unexpected children");
840   Traces->invalidate(IfConv.Tail);
923   if (IfConv.TBB != IfConv.Tail)
954   MachineTraceMetrics::Trace TailTrace = MinInstr->getTrace(IfConv.Tail);
1163         (IfConv.TBB == IfConv.Tail) ? *IfConv.FBB : *IfConv.TBB;