Lines Matching defs:Tail

86 //               |  / |                    Tail  |
88 //              Tail  |                      |   |
93 // contains compare + br.cond. Tail must be a successor of both.
109 //       b.eq Tail
112 //       b.eq Tail
114 //    Tail:
122 //       b.eq Tail
124 //    Tail:
131 // between Head and Tail, just like if-converting a diamond.
133 // FIXME: Handle PHIs in Tail by turning them into selects (if-conversion).
152   MachineBasicBlock *Tail;
167   /// The condition code that makes CmpBB branch to Tail.
170   /// Check if the Tail PHIs are trivially convertible.
173   /// Remove CmpBB from the Tail PHIs.
212 // Check that all PHIs in Tail are selecting the same value from Head and CmpBB.
215   for (auto &I : *Tail) {
238 // Assuming that trivialTailPHIs() is true, update the Tail PHIs by simply
241   for (auto &I : *Tail) {
438   Tail = CmpBB = nullptr;
445   // CmpBB can only have a single predecessor. Tail is allowed many.
454   Tail = Succ1;
456   if (!CmpBB->isSuccessor(Tail))
462                     << printMBBReference(*Tail) << '\n');
465   // Tail is allowed to have many predecessors, but we can't handle PHIs yet.
472     LLVM_DEBUG(dbgs() << "Can't handle phis in Tail.\n");
477   if (!Tail->livein_empty()) {
478     LLVM_DEBUG(dbgs() << "Can't handle live-in physregs in Tail.\n");
523     assert(TBB == Tail && "Unexpected TBB");
548   if (TBB != Tail)
553                     << ", CmpBB->Tail on "
576   // Save successor probabilties before removing CmpBB and Tail from their
579   BranchProbability CmpBB2Tail = MBPI->getEdgeProbability(CmpBB, Tail);
582   CmpBB->removeSuccessor(Tail);
589     // successor is Tail. We need to increase the successor probability for
590     // Tail to account for the CmpBB path we removed.
592     // Pr(Tail|Head) += Pr(CmpBB|Head) * Pr(Tail|CmpBB).
593     assert(*Head->succ_begin() == Tail && "Head successor is not Tail");
594     BranchProbability Head2Tail = MBPI->getEdgeProbability(Head, Tail);
684   // would have branched to Tail. These flags should cause the new Head