58     bool AllUsesDominatedByBlock(Instruction *Inst, BasicBlock *BB) const;
59     bool IsAcceptableTarget(Instruction *Inst, BasicBlock *SuccToSinkTo) const;
74 bool Sinking::AllUsesDominatedByBlock(Instruction *Inst,  in AllUsesDominatedByBlock()  argument
80   for (Value::use_iterator I = Inst->use_begin(),  in AllUsesDominatedByBlock()
81        E = Inst->use_end(); I != E; ++I) {  in AllUsesDominatedByBlock()
136     Instruction *Inst = I;  // The instruction to sink.  in ProcessBlock()  local
144     if (isa<DbgInfoIntrinsic>(Inst))  in ProcessBlock()
147     if (SinkInstruction(Inst, Stores))  in ProcessBlock()
156 static bool isSafeToMove(Instruction *Inst, AliasAnalysis *AA,  in isSafeToMove()  argument
159   if (Inst->mayWriteToMemory()) {  in isSafeToMove()
160     Stores.insert(Inst);  in isSafeToMove()
164   if (LoadInst *L = dyn_cast<LoadInst>(Inst)) {  in isSafeToMove()
172   if (isa<TerminatorInst>(Inst) || isa<PHINode>(Inst))  in isSafeToMove()
180 bool Sinking::IsAcceptableTarget(Instruction *Inst,  in IsAcceptableTarget()  argument
182   assert(Inst && "Instruction to be sunk is null");  in IsAcceptableTarget()
187   if (Inst->getParent() == SuccToSinkTo)  in IsAcceptableTarget()
194   if (SuccToSinkTo->getUniquePredecessor() != Inst->getParent()) {  in IsAcceptableTarget()
197     if (!isSafeToSpeculativelyExecute(Inst))  in IsAcceptableTarget()
202     if (!DT->dominates(Inst->getParent(), SuccToSinkTo))  in IsAcceptableTarget()
207     Loop *cur = LI->getLoopFor(Inst->getParent());  in IsAcceptableTarget()
214   return AllUsesDominatedByBlock(Inst, SuccToSinkTo);  in IsAcceptableTarget()
219 bool Sinking::SinkInstruction(Instruction *Inst,  in SinkInstruction()  argument
222   if (!isSafeToMove(Inst, AA, Stores))  in SinkInstruction()
240   DomTreeNode *DTN = DT->getNode(Inst->getParent());  in SinkInstruction()
244     if ((*I)->getIDom()->getBlock() == Inst->getParent() &&  in SinkInstruction()
245         IsAcceptableTarget(Inst, Candidate))  in SinkInstruction()
251   for (succ_iterator I = succ_begin(Inst->getParent()),  in SinkInstruction()
252       E = succ_end(Inst->getParent()); I != E && SuccToSinkTo == 0; ++I) {  in SinkInstruction()
253     if (IsAcceptableTarget(Inst, *I))  in SinkInstruction()
261   DEBUG(dbgs() << "Sink" << *Inst << " (";  in SinkInstruction()
262         WriteAsOperand(dbgs(), Inst->getParent(), false);  in SinkInstruction()
268   Inst->moveBefore(SuccToSinkTo->getFirstInsertionPt());  in SinkInstruction()