diff options
Diffstat (limited to 'lib/CodeGen/TailDuplication.cpp')
| -rw-r--r-- | lib/CodeGen/TailDuplication.cpp | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/lib/CodeGen/TailDuplication.cpp b/lib/CodeGen/TailDuplication.cpp index 5fe3cb0..93acd58 100644 --- a/lib/CodeGen/TailDuplication.cpp +++ b/lib/CodeGen/TailDuplication.cpp @@ -541,13 +541,13 @@ TailDuplicatePass::TailDuplicate(MachineBasicBlock *TailBB, MachineFunction &MF, MachineBasicBlock *PredTBB, *PredFBB; SmallVector<MachineOperand, 4> PredCond; + // EH edges are ignored by AnalyzeBranch. + if (PredBB->succ_size() != 1) + continue; if (TII->AnalyzeBranch(*PredBB, PredTBB, PredFBB, PredCond, true)) continue; if (!PredCond.empty()) continue; - // EH edges are ignored by AnalyzeBranch. - if (PredBB->succ_size() != 1) - continue; // Don't duplicate into a fall-through predecessor (at least for now). if (PredBB->isLayoutSuccessor(TailBB) && PredBB->canFallThrough()) continue; @@ -603,12 +603,11 @@ TailDuplicatePass::TailDuplicate(MachineBasicBlock *TailBB, MachineFunction &MF, MachineBasicBlock *PrevBB = prior(MachineFunction::iterator(TailBB)); MachineBasicBlock *PriorTBB = 0, *PriorFBB = 0; SmallVector<MachineOperand, 4> PriorCond; - bool PriorUnAnalyzable = - TII->AnalyzeBranch(*PrevBB, PriorTBB, PriorFBB, PriorCond, true); // This has to check PrevBB->succ_size() because EH edges are ignored by // AnalyzeBranch. - if (!PriorUnAnalyzable && PriorCond.empty() && !PriorTBB && - TailBB->pred_size() == 1 && PrevBB->succ_size() == 1 && + if (PrevBB->succ_size() == 1 && + !TII->AnalyzeBranch(*PrevBB, PriorTBB, PriorFBB, PriorCond, true) && + PriorCond.empty() && !PriorTBB && TailBB->pred_size() == 1 && !TailBB->hasAddressTaken()) { DEBUG(dbgs() << "\nMerging into block: " << *PrevBB << "From MBB: " << *TailBB); |