Lines Matching defs:BB

65 bool MachineSSAUpdater::HasValueForBlock(MachineBasicBlock *BB) const {
66   return getAvailableVals(AV).count(BB);
71 void MachineSSAUpdater::AddAvailableValue(MachineBasicBlock *BB, Register V) {
72   getAvailableVals(AV)[BB] = V;
77 Register MachineSSAUpdater::GetValueAtEndOfBlock(MachineBasicBlock *BB) {
78   return GetValueAtEndOfBlockInternal(BB);
82 Register LookForIdenticalPHI(MachineBasicBlock *BB,
84   if (BB->empty())
87   MachineBasicBlock::iterator I = BB->begin();
94   while (I != BB->end() && I->isPHI()) {
114 static MachineInstrBuilder InsertNewDef(unsigned Opcode, MachineBasicBlock *BB,
120   return BuildMI(*BB, I, DebugLoc(), TII->get(Opcode), NewVR);
130 /// 'use' in BB.  Consider code like this:
143 Register MachineSSAUpdater::GetValueInMiddleOfBlock(MachineBasicBlock *BB,
147   if (!HasValueForBlock(BB))
148     return GetValueAtEndOfBlockInternal(BB, ExistingValueOnly);
151   if (BB->pred_empty()) {
157         InsertNewDef(TargetOpcode::IMPLICIT_DEF, BB, BB->getFirstTerminator(),
168   for (MachineBasicBlock *PredBB : BB->predecessors()) {
184   // If an identical PHI is already in BB, just reuse it.
185   Register DupPHI = LookForIdenticalPHI(BB, PredValues);
194   MachineBasicBlock::iterator Loc = BB->empty() ? BB->end() : BB->begin();
196       InsertNewDef(TargetOpcode::PHI, BB, Loc, RegAttrs, MRI, TII);
270   static BlkSucc_iterator BlkSucc_begin(BlkT *BB) { return BB->succ_begin(); }
271   static BlkSucc_iterator BlkSucc_end(BlkT *BB) { return BB->succ_end(); }
302   /// FindPredecessorBlocks - Put the predecessors of BB into the Preds
304   static void FindPredecessorBlocks(MachineBasicBlock *BB,
306     append_range(*Preds, BB->predecessors());
311   static Register GetPoisonVal(MachineBasicBlock *BB,
315         InsertNewDef(TargetOpcode::IMPLICIT_DEF, BB, BB->getFirstNonPHI(),
322   static Register CreateEmptyPHI(MachineBasicBlock *BB, unsigned NumPreds,
324     MachineBasicBlock::iterator Loc = BB->empty() ? BB->end() : BB->begin();
326         InsertNewDef(TargetOpcode::PHI, BB, Loc, Updater->RegAttrs,
370 /// for the specified BB and if so, return it.  If not, construct SSA form by
374 MachineSSAUpdater::GetValueAtEndOfBlockInternal(MachineBasicBlock *BB,
377   Register ExistingVal = AvailableVals.lookup(BB);
382   return Impl.GetValue(BB);