83     bool optimizeRetainCall(Function &F, Instruction *Retain);
113 bool ObjCARCContract::optimizeRetainCall(Function &F, Instruction *Retain) {  in optimizeRetainCall()  argument
114   ImmutableCallSite CS(GetArgRCIdentityRoot(Retain));  in optimizeRetainCall()
118   if (Call->getParent() != Retain->getParent())  in optimizeRetainCall()
121   // Check that the call is next to the retain.  in optimizeRetainCall()
125   if (&*I != Retain)  in optimizeRetainCall()
134                   "return value.\nOld: "<< *Retain << "\n");  in optimizeRetainCall()
137   // retain/retainRV have the same properties.  in optimizeRetainCall()
139   cast<CallInst>(Retain)->setCalledFunction(Decl);  in optimizeRetainCall()
141   DEBUG(dbgs() << "New: " << *Retain << "\n");  in optimizeRetainCall()
145 /// Merge an autorelease with a retain into a fused call.
152   // Check that there are no instructions between the retain and the autorelease  in contractAutorelease()
154   CallInst *Retain = nullptr;  in contractAutorelease()  local
170   Retain = dyn_cast_or_null<CallInst>(*DependingInstructions.begin());  in contractAutorelease()
173   if (!Retain || GetBasicARCInstKind(Retain) != ARCInstKind::Retain ||  in contractAutorelease()
174       GetArgRCIdentityRoot(Retain) != Arg)  in contractAutorelease()
180   DEBUG(dbgs() << "    Fusing retain/autorelease!\n"  in contractAutorelease()
182                   "        Retain: " << *Retain << "\n");  in contractAutorelease()
187   Retain->setCalledFunction(Decl);  in contractAutorelease()
189   DEBUG(dbgs() << "        New RetainAutorelease: " << *Retain << "\n");  in contractAutorelease()
227     // If Inst is an unrelated retain, we don't care about it.  in findSafeStoreForStoreStrongContraction()
285   // Walk up from the Store to find the retain.  in findRetainForStoreStrongContraction()
288   while (I != Begin && GetBasicARCInstKind(&*I) != ARCInstKind::Retain) {  in findRetainForStoreStrongContraction()
291     // It is only safe to move the retain to the store if we can prove  in findRetainForStoreStrongContraction()
293     // counts in between the retain and the store.  in findRetainForStoreStrongContraction()
298   Instruction *Retain = &*I;  in findRetainForStoreStrongContraction()  local
299   if (GetBasicARCInstKind(Retain) != ARCInstKind::Retain)  in findRetainForStoreStrongContraction()
301   if (GetArgRCIdentityRoot(Retain) != New)  in findRetainForStoreStrongContraction()
303   return Retain;  in findRetainForStoreStrongContraction()
329 ///     optimization it must be safe to move the retain, load, and release to
356   // Then walk up the BB and look for a retain on New without any intervening  in tryToContractReleaseIntoStoreStrong()
358   Instruction *Retain =  in tryToContractReleaseIntoStoreStrong()  local
362   if (!Retain)  in tryToContractReleaseIntoStoreStrong()
369       llvm::dbgs() << "    Contracting retain, release into objc_storeStrong.\n"  in tryToContractReleaseIntoStoreStrong()
373                    << "            Retain:  " << *Retain << "\n"  in tryToContractReleaseIntoStoreStrong()
400   EraseInstruction(Retain);  in tryToContractReleaseIntoStoreStrong()
420     case ARCInstKind::Retain:  in tryToPeepholeInstruction()