llvm/lib/Analysis/AliasAnalysisEvaluator.cpp - rust-lang/llvm-project - Git at Google

 //===- AliasAnalysisEvaluator.cpp - Alias Analysis Accuracy Evaluator -----===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//

 #include "llvm/Analysis/AliasAnalysisEvaluator.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/IR/DataLayout.h"
 #include "llvm/IR/Function.h"
 #include "llvm/IR/InstIterator.h"
 #include "llvm/IR/Instructions.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;

 static cl::opt<bool> PrintAll("print-all-alias-modref-info", cl::ReallyHidden);

 static cl::opt<bool> PrintNoAlias("print-no-aliases", cl::ReallyHidden);
 static cl::opt<bool> PrintMayAlias("print-may-aliases", cl::ReallyHidden);
 static cl::opt<bool> PrintPartialAlias("print-partial-aliases", cl::ReallyHidden);
 static cl::opt<bool> PrintMustAlias("print-must-aliases", cl::ReallyHidden);

 static cl::opt<bool> PrintNoModRef("print-no-modref", cl::ReallyHidden);
 static cl::opt<bool> PrintRef("print-ref", cl::ReallyHidden);
 static cl::opt<bool> PrintMod("print-mod", cl::ReallyHidden);
 static cl::opt<bool> PrintModRef("print-modref", cl::ReallyHidden);

 static cl::opt<bool> EvalAAMD("evaluate-aa-metadata", cl::ReallyHidden);

 static void PrintResults(AliasResult AR, bool P,
                          std::pair<const Value *, Type *> Loc1,
                          std::pair<const Value *, Type *> Loc2,
                          const Module *M) {
   if (PrintAll || P) {
     Type *Ty1 = Loc1.second, *Ty2 = Loc2.second;
     unsigned AS1 = Loc1.first->getType()->getPointerAddressSpace();
     unsigned AS2 = Loc2.first->getType()->getPointerAddressSpace();
     std::string o1, o2;
     {
       raw_string_ostream os1(o1), os2(o2);
       Loc1.first->printAsOperand(os1, false, M);
       Loc2.first->printAsOperand(os2, false, M);
     }

     if (o2 < o1) {
       std::swap(o1, o2);
       std::swap(Ty1, Ty2);
       std::swap(AS1, AS2);
       // Change offset sign for the local AR, for printing only.
       AR.swap();
     }
     errs() << "  " << AR << ":\t";
     Ty1->print(errs(), false, /* NoDetails */ true);
     if (AS1 != 0)
       errs() << " addrspace(" << AS1 << ")";
     errs() << "* " << o1 << ", ";
     Ty2->print(errs(), false, /* NoDetails */ true);
     if (AS2 != 0)
       errs() << " addrspace(" << AS2 << ")";
     errs() << "* " << o2 << "\n";
   }
 }

 static inline void PrintModRefResults(
     const char *Msg, bool P, Instruction *I,
     std::pair<const Value *, Type *> Loc, Module *M) {
   if (PrintAll || P) {
     errs() << "  " << Msg << ":  Ptr: ";
     Loc.second->print(errs(), false, /* NoDetails */ true);
     errs() << "* ";
     Loc.first->printAsOperand(errs(), false, M);
     errs() << "\t<->" << *I << '\n';
   }
 }

 static inline void PrintModRefResults(const char *Msg, bool P, CallBase *CallA,
                                       CallBase *CallB, Module *M) {
   if (PrintAll || P) {
     errs() << "  " << Msg << ": " << *CallA << " <-> " << *CallB << '\n';
   }
 }

 static inline void PrintLoadStoreResults(AliasResult AR, bool P,
                                          const Value *V1, const Value *V2,
                                          const Module *M) {
   if (PrintAll || P) {
     errs() << "  " << AR << ": " << *V1 << " <-> " << *V2 << '\n';
   }
 }

 PreservedAnalyses AAEvaluator::run(Function &F, FunctionAnalysisManager &AM) {
   runInternal(F, AM.getResult<AAManager>(F));
   return PreservedAnalyses::all();
 }

 void AAEvaluator::runInternal(Function &F, AAResults &AA) {
   const DataLayout &DL = F.getDataLayout();

   ++FunctionCount;

   SetVector<std::pair<const Value *, Type *>> Pointers;
   SmallSetVector<CallBase *, 16> Calls;
   SetVector<Value *> Loads;
   SetVector<Value *> Stores;

   for (Instruction &Inst : instructions(F)) {
     if (auto *LI = dyn_cast<LoadInst>(&Inst)) {
       Pointers.insert({LI->getPointerOperand(), LI->getType()});
       Loads.insert(LI);
     } else if (auto *SI = dyn_cast<StoreInst>(&Inst)) {
       Pointers.insert({SI->getPointerOperand(),
                        SI->getValueOperand()->getType()});
       Stores.insert(SI);
     } else if (auto *CB = dyn_cast<CallBase>(&Inst))
       Calls.insert(CB);
   }

   if (PrintAll || PrintNoAlias || PrintMayAlias || PrintPartialAlias ||
       PrintMustAlias || PrintNoModRef || PrintMod || PrintRef || PrintModRef)
     errs() << "Function: " << F.getName() << ": " << Pointers.size()
            << " pointers, " << Calls.size() << " call sites\n";

   // iterate over the worklist, and run the full (n^2)/2 disambiguations
   for (auto I1 = Pointers.begin(), E = Pointers.end(); I1 != E; ++I1) {
     LocationSize Size1 = LocationSize::precise(DL.getTypeStoreSize(I1->second));
     for (auto I2 = Pointers.begin(); I2 != I1; ++I2) {
       LocationSize Size2 =
           LocationSize::precise(DL.getTypeStoreSize(I2->second));
       AliasResult AR = AA.alias(I1->first, Size1, I2->first, Size2);
       switch (AR) {
       case AliasResult::NoAlias:
         PrintResults(AR, PrintNoAlias, *I1, *I2, F.getParent());
         ++NoAliasCount;
         break;
       case AliasResult::MayAlias:
         PrintResults(AR, PrintMayAlias, *I1, *I2, F.getParent());
         ++MayAliasCount;
         break;
       case AliasResult::PartialAlias:
         PrintResults(AR, PrintPartialAlias, *I1, *I2, F.getParent());
         ++PartialAliasCount;
         break;
       case AliasResult::MustAlias:
         PrintResults(AR, PrintMustAlias, *I1, *I2, F.getParent());
         ++MustAliasCount;
         break;
       }
     }
   }

   if (EvalAAMD) {
     // iterate over all pairs of load, store
     for (Value *Load : Loads) {
       for (Value *Store : Stores) {
         AliasResult AR = AA.alias(MemoryLocation::get(cast<LoadInst>(Load)),
                                   MemoryLocation::get(cast<StoreInst>(Store)));
         switch (AR) {
         case AliasResult::NoAlias:
           PrintLoadStoreResults(AR, PrintNoAlias, Load, Store, F.getParent());
           ++NoAliasCount;
           break;
         case AliasResult::MayAlias:
           PrintLoadStoreResults(AR, PrintMayAlias, Load, Store, F.getParent());
           ++MayAliasCount;
           break;
         case AliasResult::PartialAlias:
           PrintLoadStoreResults(AR, PrintPartialAlias, Load, Store, F.getParent());
           ++PartialAliasCount;
           break;
         case AliasResult::MustAlias:
           PrintLoadStoreResults(AR, PrintMustAlias, Load, Store, F.getParent());
           ++MustAliasCount;
           break;
         }
       }
     }

     // iterate over all pairs of store, store
     for (SetVector<Value *>::iterator I1 = Stores.begin(), E = Stores.end();
          I1 != E; ++I1) {
       for (SetVector<Value *>::iterator I2 = Stores.begin(); I2 != I1; ++I2) {
         AliasResult AR = AA.alias(MemoryLocation::get(cast<StoreInst>(*I1)),
                                   MemoryLocation::get(cast<StoreInst>(*I2)));
         switch (AR) {
         case AliasResult::NoAlias:
           PrintLoadStoreResults(AR, PrintNoAlias, *I1, *I2, F.getParent());
           ++NoAliasCount;
           break;
         case AliasResult::MayAlias:
           PrintLoadStoreResults(AR, PrintMayAlias, *I1, *I2, F.getParent());
           ++MayAliasCount;
           break;
         case AliasResult::PartialAlias:
           PrintLoadStoreResults(AR, PrintPartialAlias, *I1, *I2, F.getParent());
           ++PartialAliasCount;
           break;
         case AliasResult::MustAlias:
           PrintLoadStoreResults(AR, PrintMustAlias, *I1, *I2, F.getParent());
           ++MustAliasCount;
           break;
         }
       }
     }
   }

   // Mod/ref alias analysis: compare all pairs of calls and values
   for (CallBase *Call : Calls) {
     for (const auto &Pointer : Pointers) {
       LocationSize Size =
           LocationSize::precise(DL.getTypeStoreSize(Pointer.second));
       switch (AA.getModRefInfo(Call, Pointer.first, Size)) {
       case ModRefInfo::NoModRef:
         PrintModRefResults("NoModRef", PrintNoModRef, Call, Pointer,
                            F.getParent());
         ++NoModRefCount;
         break;
       case ModRefInfo::Mod:
         PrintModRefResults("Just Mod", PrintMod, Call, Pointer, F.getParent());
         ++ModCount;
         break;
       case ModRefInfo::Ref:
         PrintModRefResults("Just Ref", PrintRef, Call, Pointer, F.getParent());
         ++RefCount;
         break;
       case ModRefInfo::ModRef:
         PrintModRefResults("Both ModRef", PrintModRef, Call, Pointer,
                            F.getParent());
         ++ModRefCount;
         break;
       }
     }
   }

   // Mod/ref alias analysis: compare all pairs of calls
   for (CallBase *CallA : Calls) {
     for (CallBase *CallB : Calls) {
       if (CallA == CallB)
         continue;
       switch (AA.getModRefInfo(CallA, CallB)) {
       case ModRefInfo::NoModRef:
         PrintModRefResults("NoModRef", PrintNoModRef, CallA, CallB,
                            F.getParent());
         ++NoModRefCount;
         break;
       case ModRefInfo::Mod:
         PrintModRefResults("Just Mod", PrintMod, CallA, CallB, F.getParent());
         ++ModCount;
         break;
       case ModRefInfo::Ref:
         PrintModRefResults("Just Ref", PrintRef, CallA, CallB, F.getParent());
         ++RefCount;
         break;
       case ModRefInfo::ModRef:
         PrintModRefResults("Both ModRef", PrintModRef, CallA, CallB,
                            F.getParent());
         ++ModRefCount;
         break;
       }
     }
   }
 }

 static void PrintPercent(int64_t Num, int64_t Sum) {
   errs() << "(" << Num * 100LL / Sum << "." << ((Num * 1000LL / Sum) % 10)
          << "%)\n";
 }

 AAEvaluator::~AAEvaluator() {
   if (FunctionCount == 0)
     return;

   int64_t AliasSum =
       NoAliasCount + MayAliasCount + PartialAliasCount + MustAliasCount;
   errs() << "===== Alias Analysis Evaluator Report =====\n";
   if (AliasSum == 0) {
     errs() << "  Alias Analysis Evaluator Summary: No pointers!\n";
   } else {
     errs() << "  " << AliasSum << " Total Alias Queries Performed\n";
     errs() << "  " << NoAliasCount << " no alias responses ";
     PrintPercent(NoAliasCount, AliasSum);
     errs() << "  " << MayAliasCount << " may alias responses ";
     PrintPercent(MayAliasCount, AliasSum);
     errs() << "  " << PartialAliasCount << " partial alias responses ";
     PrintPercent(PartialAliasCount, AliasSum);
     errs() << "  " << MustAliasCount << " must alias responses ";
     PrintPercent(MustAliasCount, AliasSum);
     errs() << "  Alias Analysis Evaluator Pointer Alias Summary: "
            << NoAliasCount * 100 / AliasSum << "%/"
            << MayAliasCount * 100 / AliasSum << "%/"
            << PartialAliasCount * 100 / AliasSum << "%/"
            << MustAliasCount * 100 / AliasSum << "%\n";
   }

   // Display the summary for mod/ref analysis
   int64_t ModRefSum = NoModRefCount + RefCount + ModCount + ModRefCount;
   if (ModRefSum == 0) {
     errs() << "  Alias Analysis Mod/Ref Evaluator Summary: no "
               "mod/ref!\n";
   } else {
     errs() << "  " << ModRefSum << " Total ModRef Queries Performed\n";
     errs() << "  " << NoModRefCount << " no mod/ref responses ";
     PrintPercent(NoModRefCount, ModRefSum);
     errs() << "  " << ModCount << " mod responses ";
     PrintPercent(ModCount, ModRefSum);
     errs() << "  " << RefCount << " ref responses ";
     PrintPercent(RefCount, ModRefSum);
     errs() << "  " << ModRefCount << " mod & ref responses ";
     PrintPercent(ModRefCount, ModRefSum);
     errs() << "  Alias Analysis Evaluator Mod/Ref Summary: "
            << NoModRefCount * 100 / ModRefSum << "%/"
            << ModCount * 100 / ModRefSum << "%/" << RefCount * 100 / ModRefSum
            << "%/" << ModRefCount * 100 / ModRefSum << "%\n";
   }
 }
	//===- AliasAnalysisEvaluator.cpp - Alias Analysis Accuracy Evaluator -----===//
	//
	// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
	// See https://llvm.org/LICENSE.txt for license information.
	// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
	//
	//===----------------------------------------------------------------------===//

	#include "llvm/Analysis/AliasAnalysisEvaluator.h"
	#include "llvm/ADT/SetVector.h"
	#include "llvm/Analysis/AliasAnalysis.h"
	#include "llvm/IR/DataLayout.h"
	#include "llvm/IR/Function.h"
	#include "llvm/IR/InstIterator.h"
	#include "llvm/IR/Instructions.h"
	#include "llvm/IR/Module.h"
	#include "llvm/Support/CommandLine.h"
	#include "llvm/Support/raw_ostream.h"
	using namespace llvm;

	static cl::opt<bool> PrintAll("print-all-alias-modref-info", cl::ReallyHidden);

	static cl::opt<bool> PrintNoAlias("print-no-aliases", cl::ReallyHidden);
	static cl::opt<bool> PrintMayAlias("print-may-aliases", cl::ReallyHidden);
	static cl::opt<bool> PrintPartialAlias("print-partial-aliases", cl::ReallyHidden);
	static cl::opt<bool> PrintMustAlias("print-must-aliases", cl::ReallyHidden);

	static cl::opt<bool> PrintNoModRef("print-no-modref", cl::ReallyHidden);
	static cl::opt<bool> PrintRef("print-ref", cl::ReallyHidden);
	static cl::opt<bool> PrintMod("print-mod", cl::ReallyHidden);
	static cl::opt<bool> PrintModRef("print-modref", cl::ReallyHidden);

	static cl::opt<bool> EvalAAMD("evaluate-aa-metadata", cl::ReallyHidden);

	static void PrintResults(AliasResult AR, bool P,
	std::pair<const Value , Type > Loc1,
	std::pair<const Value , Type > Loc2,
	const Module *M) {
	if (PrintAll \|\| P) {
	Type Ty1 = Loc1.second, Ty2 = Loc2.second;
	unsigned AS1 = Loc1.first->getType()->getPointerAddressSpace();
	unsigned AS2 = Loc2.first->getType()->getPointerAddressSpace();
	std::string o1, o2;
	{
	raw_string_ostream os1(o1), os2(o2);
	Loc1.first->printAsOperand(os1, false, M);
	Loc2.first->printAsOperand(os2, false, M);
	}

	if (o2 < o1) {
	std::swap(o1, o2);
	std::swap(Ty1, Ty2);
	std::swap(AS1, AS2);
	// Change offset sign for the local AR, for printing only.
	AR.swap();
	}
	errs() << " " << AR << ":\t";
	Ty1->print(errs(), false, /* NoDetails */ true);
	if (AS1 != 0)
	errs() << " addrspace(" << AS1 << ")";
	errs() << "* " << o1 << ", ";
	Ty2->print(errs(), false, /* NoDetails */ true);
	if (AS2 != 0)
	errs() << " addrspace(" << AS2 << ")";
	errs() << "* " << o2 << "\n";
	}
	}

	static inline void PrintModRefResults(
	const char Msg, bool P, Instruction I,
	std::pair<const Value , Type > Loc, Module *M) {
	if (PrintAll \|\| P) {
	errs() << " " << Msg << ": Ptr: ";
	Loc.second->print(errs(), false, /* NoDetails */ true);
	errs() << "* ";
	Loc.first->printAsOperand(errs(), false, M);
	errs() << "\t<->" << *I << '\n';
	}
	}

	static inline void PrintModRefResults(const char Msg, bool P, CallBase CallA,
	CallBase CallB, Module M) {
	if (PrintAll \|\| P) {
	errs() << " " << Msg << ": " << CallA << " <-> " << CallB << '\n';
	}
	}

	static inline void PrintLoadStoreResults(AliasResult AR, bool P,
	const Value V1, const Value V2,
	const Module *M) {
	if (PrintAll \|\| P) {
	errs() << " " << AR << ": " << V1 << " <-> " << V2 << '\n';
	}
	}

	PreservedAnalyses AAEvaluator::run(Function &F, FunctionAnalysisManager &AM) {
	runInternal(F, AM.getResult<AAManager>(F));
	return PreservedAnalyses::all();
	}

	void AAEvaluator::runInternal(Function &F, AAResults &AA) {
	const DataLayout &DL = F.getDataLayout();

	++FunctionCount;

	SetVector<std::pair<const Value , Type >> Pointers;
	SmallSetVector<CallBase *, 16> Calls;
	SetVector<Value *> Loads;
	SetVector<Value *> Stores;

	for (Instruction &Inst : instructions(F)) {
	if (auto *LI = dyn_cast<LoadInst>(&Inst)) {
	Pointers.insert({LI->getPointerOperand(), LI->getType()});
	Loads.insert(LI);
	} else if (auto *SI = dyn_cast<StoreInst>(&Inst)) {
	Pointers.insert({SI->getPointerOperand(),
	SI->getValueOperand()->getType()});
	Stores.insert(SI);
	} else if (auto *CB = dyn_cast<CallBase>(&Inst))
	Calls.insert(CB);
	}

	if (PrintAll \|\| PrintNoAlias \|\| PrintMayAlias \|\| PrintPartialAlias \|\|
	PrintMustAlias \|\| PrintNoModRef \|\| PrintMod \|\| PrintRef \|\| PrintModRef)
	errs() << "Function: " << F.getName() << ": " << Pointers.size()
	<< " pointers, " << Calls.size() << " call sites\n";

	// iterate over the worklist, and run the full (n^2)/2 disambiguations
	for (auto I1 = Pointers.begin(), E = Pointers.end(); I1 != E; ++I1) {
	LocationSize Size1 = LocationSize::precise(DL.getTypeStoreSize(I1->second));
	for (auto I2 = Pointers.begin(); I2 != I1; ++I2) {
	LocationSize Size2 =
	LocationSize::precise(DL.getTypeStoreSize(I2->second));
	AliasResult AR = AA.alias(I1->first, Size1, I2->first, Size2);
	switch (AR) {
	case AliasResult::NoAlias:
	PrintResults(AR, PrintNoAlias, I1, I2, F.getParent());
	++NoAliasCount;
	break;
	case AliasResult::MayAlias:
	PrintResults(AR, PrintMayAlias, I1, I2, F.getParent());
	++MayAliasCount;
	break;
	case AliasResult::PartialAlias:
	PrintResults(AR, PrintPartialAlias, I1, I2, F.getParent());
	++PartialAliasCount;
	break;
	case AliasResult::MustAlias:
	PrintResults(AR, PrintMustAlias, I1, I2, F.getParent());
	++MustAliasCount;
	break;
	}
	}
	}

	if (EvalAAMD) {
	// iterate over all pairs of load, store
	for (Value *Load : Loads) {
	for (Value *Store : Stores) {
	AliasResult AR = AA.alias(MemoryLocation::get(cast<LoadInst>(Load)),
	MemoryLocation::get(cast<StoreInst>(Store)));
	switch (AR) {
	case AliasResult::NoAlias:
	PrintLoadStoreResults(AR, PrintNoAlias, Load, Store, F.getParent());
	++NoAliasCount;
	break;
	case AliasResult::MayAlias:
	PrintLoadStoreResults(AR, PrintMayAlias, Load, Store, F.getParent());
	++MayAliasCount;
	break;
	case AliasResult::PartialAlias:
	PrintLoadStoreResults(AR, PrintPartialAlias, Load, Store, F.getParent());
	++PartialAliasCount;
	break;
	case AliasResult::MustAlias:
	PrintLoadStoreResults(AR, PrintMustAlias, Load, Store, F.getParent());
	++MustAliasCount;
	break;
	}
	}
	}

	// iterate over all pairs of store, store
	for (SetVector<Value *>::iterator I1 = Stores.begin(), E = Stores.end();
	I1 != E; ++I1) {
	for (SetVector<Value *>::iterator I2 = Stores.begin(); I2 != I1; ++I2) {
	AliasResult AR = AA.alias(MemoryLocation::get(cast<StoreInst>(*I1)),
	MemoryLocation::get(cast<StoreInst>(*I2)));
	switch (AR) {
	case AliasResult::NoAlias:
	PrintLoadStoreResults(AR, PrintNoAlias, I1, I2, F.getParent());
	++NoAliasCount;
	break;
	case AliasResult::MayAlias:
	PrintLoadStoreResults(AR, PrintMayAlias, I1, I2, F.getParent());
	++MayAliasCount;
	break;
	case AliasResult::PartialAlias:
	PrintLoadStoreResults(AR, PrintPartialAlias, I1, I2, F.getParent());
	++PartialAliasCount;
	break;
	case AliasResult::MustAlias:
	PrintLoadStoreResults(AR, PrintMustAlias, I1, I2, F.getParent());
	++MustAliasCount;
	break;
	}
	}
	}
	}

	// Mod/ref alias analysis: compare all pairs of calls and values
	for (CallBase *Call : Calls) {
	for (const auto &Pointer : Pointers) {
	LocationSize Size =
	LocationSize::precise(DL.getTypeStoreSize(Pointer.second));
	switch (AA.getModRefInfo(Call, Pointer.first, Size)) {
	case ModRefInfo::NoModRef:
	PrintModRefResults("NoModRef", PrintNoModRef, Call, Pointer,
	F.getParent());
	++NoModRefCount;
	break;
	case ModRefInfo::Mod:
	PrintModRefResults("Just Mod", PrintMod, Call, Pointer, F.getParent());
	++ModCount;
	break;
	case ModRefInfo::Ref:
	PrintModRefResults("Just Ref", PrintRef, Call, Pointer, F.getParent());
	++RefCount;
	break;
	case ModRefInfo::ModRef:
	PrintModRefResults("Both ModRef", PrintModRef, Call, Pointer,
	F.getParent());
	++ModRefCount;
	break;
	}
	}
	}

	// Mod/ref alias analysis: compare all pairs of calls
	for (CallBase *CallA : Calls) {
	for (CallBase *CallB : Calls) {
	if (CallA == CallB)
	continue;
	switch (AA.getModRefInfo(CallA, CallB)) {
	case ModRefInfo::NoModRef:
	PrintModRefResults("NoModRef", PrintNoModRef, CallA, CallB,
	F.getParent());
	++NoModRefCount;
	break;
	case ModRefInfo::Mod:
	PrintModRefResults("Just Mod", PrintMod, CallA, CallB, F.getParent());
	++ModCount;
	break;
	case ModRefInfo::Ref:
	PrintModRefResults("Just Ref", PrintRef, CallA, CallB, F.getParent());
	++RefCount;
	break;
	case ModRefInfo::ModRef:
	PrintModRefResults("Both ModRef", PrintModRef, CallA, CallB,
	F.getParent());
	++ModRefCount;
	break;
	}
	}
	}
	}

	static void PrintPercent(int64_t Num, int64_t Sum) {
	errs() << "(" << Num * 100LL / Sum << "." << ((Num * 1000LL / Sum) % 10)
	<< "%)\n";
	}

	AAEvaluator::~AAEvaluator() {
	if (FunctionCount == 0)
	return;

	int64_t AliasSum =
	NoAliasCount + MayAliasCount + PartialAliasCount + MustAliasCount;
	errs() << "===== Alias Analysis Evaluator Report =====\n";
	if (AliasSum == 0) {
	errs() << " Alias Analysis Evaluator Summary: No pointers!\n";
	} else {
	errs() << " " << AliasSum << " Total Alias Queries Performed\n";
	errs() << " " << NoAliasCount << " no alias responses ";
	PrintPercent(NoAliasCount, AliasSum);
	errs() << " " << MayAliasCount << " may alias responses ";
	PrintPercent(MayAliasCount, AliasSum);
	errs() << " " << PartialAliasCount << " partial alias responses ";
	PrintPercent(PartialAliasCount, AliasSum);
	errs() << " " << MustAliasCount << " must alias responses ";
	PrintPercent(MustAliasCount, AliasSum);
	errs() << " Alias Analysis Evaluator Pointer Alias Summary: "
	<< NoAliasCount * 100 / AliasSum << "%/"
	<< MayAliasCount * 100 / AliasSum << "%/"
	<< PartialAliasCount * 100 / AliasSum << "%/"
	<< MustAliasCount * 100 / AliasSum << "%\n";
	}

	// Display the summary for mod/ref analysis
	int64_t ModRefSum = NoModRefCount + RefCount + ModCount + ModRefCount;
	if (ModRefSum == 0) {
	errs() << " Alias Analysis Mod/Ref Evaluator Summary: no "
	"mod/ref!\n";
	} else {
	errs() << " " << ModRefSum << " Total ModRef Queries Performed\n";
	errs() << " " << NoModRefCount << " no mod/ref responses ";
	PrintPercent(NoModRefCount, ModRefSum);
	errs() << " " << ModCount << " mod responses ";
	PrintPercent(ModCount, ModRefSum);
	errs() << " " << RefCount << " ref responses ";
	PrintPercent(RefCount, ModRefSum);
	errs() << " " << ModRefCount << " mod & ref responses ";
	PrintPercent(ModRefCount, ModRefSum);
	errs() << " Alias Analysis Evaluator Mod/Ref Summary: "
	<< NoModRefCount * 100 / ModRefSum << "%/"
	<< ModCount * 100 / ModRefSum << "%/" << RefCount * 100 / ModRefSum
	<< "%/" << ModRefCount * 100 / ModRefSum << "%\n";
	}
	}