bool shouldTailDuplicate(const MachineFunction &MF,
bool IsSimple, MachineBasicBlock &TailBB);
bool isSimpleBB(MachineBasicBlock *TailBB);
- bool canCompletelyDuplicateBB(MachineBasicBlock &BB, bool IsSimple);
+ bool canCompletelyDuplicateBB(MachineBasicBlock &BB);
bool duplicateSimpleBB(MachineBasicBlock *TailBB,
SmallVector<MachineBasicBlock*, 8> &TDBBs,
const DenseSet<unsigned> &RegsUsedByPhi,
if (!PreRegAlloc)
return true;
- return canCompletelyDuplicateBB(TailBB, IsSimple);
+ return canCompletelyDuplicateBB(TailBB);
}
/// isSimpleBB - True if this BB has only one unconditional jump.
}
bool
-TailDuplicatePass::canCompletelyDuplicateBB(MachineBasicBlock &BB,
- bool isSimple) {
+TailDuplicatePass::canCompletelyDuplicateBB(MachineBasicBlock &BB) {
SmallPtrSet<MachineBasicBlock*, 8> Succs(BB.succ_begin(), BB.succ_end());
for (MachineBasicBlock::pred_iterator PI = BB.pred_begin(),
PE = BB.pred_end(); PI != PE; ++PI) {
MachineBasicBlock *PredBB = *PI;
- if (isSimple) {
- if (PredBB->getLandingPadSuccessor())
- return false;
- if (bothUsedInPHI(*PredBB, Succs))
- return false;
- } else {
- if (PredBB->succ_size() > 1)
- return false;
- }
+ if (PredBB->succ_size() > 1)
+ return false;
MachineBasicBlock *PredTBB = NULL, *PredFBB = NULL;
SmallVector<MachineOperand, 4> PredCond;
if (TII->AnalyzeBranch(*PredBB, PredTBB, PredFBB, PredCond, true))
return false;
- if (!isSimple && !PredCond.empty())
+ if (!PredCond.empty())
return false;
}
return true;