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https://github.com/c64scene-ar/llvm-6502.git
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d04a8d4b33
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
301 lines
11 KiB
C++
301 lines
11 KiB
C++
//===- AliasAnalysisEvaluator.cpp - Alias Analysis Accuracy Evaluator -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a simple N^2 alias analysis accuracy evaluator.
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// Basically, for each function in the program, it simply queries to see how the
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// alias analysis implementation answers alias queries between each pair of
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// pointers in the function.
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//
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// This is inspired and adapted from code by: Naveen Neelakantam, Francesco
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// Spadini, and Wojciech Stryjewski.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/Passes.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Function.h"
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#include "llvm/Instructions.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/InstIterator.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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static cl::opt<bool> PrintAll("print-all-alias-modref-info", cl::ReallyHidden);
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static cl::opt<bool> PrintNoAlias("print-no-aliases", cl::ReallyHidden);
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static cl::opt<bool> PrintMayAlias("print-may-aliases", cl::ReallyHidden);
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static cl::opt<bool> PrintPartialAlias("print-partial-aliases", cl::ReallyHidden);
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static cl::opt<bool> PrintMustAlias("print-must-aliases", cl::ReallyHidden);
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static cl::opt<bool> PrintNoModRef("print-no-modref", cl::ReallyHidden);
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static cl::opt<bool> PrintMod("print-mod", cl::ReallyHidden);
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static cl::opt<bool> PrintRef("print-ref", cl::ReallyHidden);
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static cl::opt<bool> PrintModRef("print-modref", cl::ReallyHidden);
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namespace {
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class AAEval : public FunctionPass {
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unsigned NoAlias, MayAlias, PartialAlias, MustAlias;
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unsigned NoModRef, Mod, Ref, ModRef;
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public:
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static char ID; // Pass identification, replacement for typeid
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AAEval() : FunctionPass(ID) {
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initializeAAEvalPass(*PassRegistry::getPassRegistry());
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired<AliasAnalysis>();
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AU.setPreservesAll();
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}
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bool doInitialization(Module &M) {
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NoAlias = MayAlias = PartialAlias = MustAlias = 0;
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NoModRef = Mod = Ref = ModRef = 0;
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if (PrintAll) {
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PrintNoAlias = PrintMayAlias = true;
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PrintPartialAlias = PrintMustAlias = true;
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PrintNoModRef = PrintMod = PrintRef = PrintModRef = true;
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}
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return false;
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}
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bool runOnFunction(Function &F);
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bool doFinalization(Module &M);
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};
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}
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char AAEval::ID = 0;
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INITIALIZE_PASS_BEGIN(AAEval, "aa-eval",
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"Exhaustive Alias Analysis Precision Evaluator", false, true)
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INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
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INITIALIZE_PASS_END(AAEval, "aa-eval",
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"Exhaustive Alias Analysis Precision Evaluator", false, true)
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FunctionPass *llvm::createAAEvalPass() { return new AAEval(); }
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static void PrintResults(const char *Msg, bool P, const Value *V1,
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const Value *V2, const Module *M) {
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if (P) {
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std::string o1, o2;
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{
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raw_string_ostream os1(o1), os2(o2);
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WriteAsOperand(os1, V1, true, M);
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WriteAsOperand(os2, V2, true, M);
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}
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if (o2 < o1)
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std::swap(o1, o2);
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errs() << " " << Msg << ":\t"
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<< o1 << ", "
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<< o2 << "\n";
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}
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}
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static inline void
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PrintModRefResults(const char *Msg, bool P, Instruction *I, Value *Ptr,
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Module *M) {
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if (P) {
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errs() << " " << Msg << ": Ptr: ";
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WriteAsOperand(errs(), Ptr, true, M);
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errs() << "\t<->" << *I << '\n';
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}
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}
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static inline void
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PrintModRefResults(const char *Msg, bool P, CallSite CSA, CallSite CSB,
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Module *M) {
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if (P) {
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errs() << " " << Msg << ": " << *CSA.getInstruction()
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<< " <-> " << *CSB.getInstruction() << '\n';
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}
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}
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static inline bool isInterestingPointer(Value *V) {
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return V->getType()->isPointerTy()
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&& !isa<ConstantPointerNull>(V);
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}
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bool AAEval::runOnFunction(Function &F) {
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AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
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SetVector<Value *> Pointers;
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SetVector<CallSite> CallSites;
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for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I)
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if (I->getType()->isPointerTy()) // Add all pointer arguments.
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Pointers.insert(I);
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for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
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if (I->getType()->isPointerTy()) // Add all pointer instructions.
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Pointers.insert(&*I);
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Instruction &Inst = *I;
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if (CallSite CS = cast<Value>(&Inst)) {
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Value *Callee = CS.getCalledValue();
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// Skip actual functions for direct function calls.
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if (!isa<Function>(Callee) && isInterestingPointer(Callee))
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Pointers.insert(Callee);
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// Consider formals.
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for (CallSite::arg_iterator AI = CS.arg_begin(), AE = CS.arg_end();
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AI != AE; ++AI)
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if (isInterestingPointer(*AI))
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Pointers.insert(*AI);
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CallSites.insert(CS);
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} else {
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// Consider all operands.
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for (Instruction::op_iterator OI = Inst.op_begin(), OE = Inst.op_end();
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OI != OE; ++OI)
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if (isInterestingPointer(*OI))
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Pointers.insert(*OI);
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}
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}
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if (PrintNoAlias || PrintMayAlias || PrintPartialAlias || PrintMustAlias ||
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PrintNoModRef || PrintMod || PrintRef || PrintModRef)
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errs() << "Function: " << F.getName() << ": " << Pointers.size()
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<< " pointers, " << CallSites.size() << " call sites\n";
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// iterate over the worklist, and run the full (n^2)/2 disambiguations
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for (SetVector<Value *>::iterator I1 = Pointers.begin(), E = Pointers.end();
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I1 != E; ++I1) {
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uint64_t I1Size = AliasAnalysis::UnknownSize;
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Type *I1ElTy = cast<PointerType>((*I1)->getType())->getElementType();
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if (I1ElTy->isSized()) I1Size = AA.getTypeStoreSize(I1ElTy);
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for (SetVector<Value *>::iterator I2 = Pointers.begin(); I2 != I1; ++I2) {
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uint64_t I2Size = AliasAnalysis::UnknownSize;
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Type *I2ElTy =cast<PointerType>((*I2)->getType())->getElementType();
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if (I2ElTy->isSized()) I2Size = AA.getTypeStoreSize(I2ElTy);
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switch (AA.alias(*I1, I1Size, *I2, I2Size)) {
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case AliasAnalysis::NoAlias:
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PrintResults("NoAlias", PrintNoAlias, *I1, *I2, F.getParent());
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++NoAlias; break;
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case AliasAnalysis::MayAlias:
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PrintResults("MayAlias", PrintMayAlias, *I1, *I2, F.getParent());
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++MayAlias; break;
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case AliasAnalysis::PartialAlias:
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PrintResults("PartialAlias", PrintPartialAlias, *I1, *I2,
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F.getParent());
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++PartialAlias; break;
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case AliasAnalysis::MustAlias:
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PrintResults("MustAlias", PrintMustAlias, *I1, *I2, F.getParent());
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++MustAlias; break;
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}
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}
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}
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// Mod/ref alias analysis: compare all pairs of calls and values
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for (SetVector<CallSite>::iterator C = CallSites.begin(),
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Ce = CallSites.end(); C != Ce; ++C) {
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Instruction *I = C->getInstruction();
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for (SetVector<Value *>::iterator V = Pointers.begin(), Ve = Pointers.end();
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V != Ve; ++V) {
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uint64_t Size = AliasAnalysis::UnknownSize;
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Type *ElTy = cast<PointerType>((*V)->getType())->getElementType();
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if (ElTy->isSized()) Size = AA.getTypeStoreSize(ElTy);
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switch (AA.getModRefInfo(*C, *V, Size)) {
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case AliasAnalysis::NoModRef:
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PrintModRefResults("NoModRef", PrintNoModRef, I, *V, F.getParent());
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++NoModRef; break;
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case AliasAnalysis::Mod:
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PrintModRefResults("Just Mod", PrintMod, I, *V, F.getParent());
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++Mod; break;
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case AliasAnalysis::Ref:
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PrintModRefResults("Just Ref", PrintRef, I, *V, F.getParent());
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++Ref; break;
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case AliasAnalysis::ModRef:
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PrintModRefResults("Both ModRef", PrintModRef, I, *V, F.getParent());
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++ModRef; break;
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}
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}
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}
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// Mod/ref alias analysis: compare all pairs of calls
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for (SetVector<CallSite>::iterator C = CallSites.begin(),
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Ce = CallSites.end(); C != Ce; ++C) {
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for (SetVector<CallSite>::iterator D = CallSites.begin(); D != Ce; ++D) {
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if (D == C)
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continue;
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switch (AA.getModRefInfo(*C, *D)) {
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case AliasAnalysis::NoModRef:
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PrintModRefResults("NoModRef", PrintNoModRef, *C, *D, F.getParent());
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++NoModRef; break;
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case AliasAnalysis::Mod:
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PrintModRefResults("Just Mod", PrintMod, *C, *D, F.getParent());
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++Mod; break;
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case AliasAnalysis::Ref:
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PrintModRefResults("Just Ref", PrintRef, *C, *D, F.getParent());
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++Ref; break;
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case AliasAnalysis::ModRef:
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PrintModRefResults("Both ModRef", PrintModRef, *C, *D, F.getParent());
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++ModRef; break;
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}
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}
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}
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return false;
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}
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static void PrintPercent(unsigned Num, unsigned Sum) {
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errs() << "(" << Num*100ULL/Sum << "."
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<< ((Num*1000ULL/Sum) % 10) << "%)\n";
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}
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bool AAEval::doFinalization(Module &M) {
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unsigned AliasSum = NoAlias + MayAlias + PartialAlias + MustAlias;
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errs() << "===== Alias Analysis Evaluator Report =====\n";
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if (AliasSum == 0) {
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errs() << " Alias Analysis Evaluator Summary: No pointers!\n";
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} else {
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errs() << " " << AliasSum << " Total Alias Queries Performed\n";
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errs() << " " << NoAlias << " no alias responses ";
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PrintPercent(NoAlias, AliasSum);
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errs() << " " << MayAlias << " may alias responses ";
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PrintPercent(MayAlias, AliasSum);
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errs() << " " << PartialAlias << " partial alias responses ";
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PrintPercent(PartialAlias, AliasSum);
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errs() << " " << MustAlias << " must alias responses ";
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PrintPercent(MustAlias, AliasSum);
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errs() << " Alias Analysis Evaluator Pointer Alias Summary: "
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<< NoAlias*100/AliasSum << "%/" << MayAlias*100/AliasSum << "%/"
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<< PartialAlias*100/AliasSum << "%/"
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<< MustAlias*100/AliasSum << "%\n";
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}
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// Display the summary for mod/ref analysis
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unsigned ModRefSum = NoModRef + Mod + Ref + ModRef;
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if (ModRefSum == 0) {
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errs() << " Alias Analysis Mod/Ref Evaluator Summary: no mod/ref!\n";
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} else {
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errs() << " " << ModRefSum << " Total ModRef Queries Performed\n";
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errs() << " " << NoModRef << " no mod/ref responses ";
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PrintPercent(NoModRef, ModRefSum);
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errs() << " " << Mod << " mod responses ";
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PrintPercent(Mod, ModRefSum);
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errs() << " " << Ref << " ref responses ";
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PrintPercent(Ref, ModRefSum);
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errs() << " " << ModRef << " mod & ref responses ";
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PrintPercent(ModRef, ModRefSum);
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errs() << " Alias Analysis Evaluator Mod/Ref Summary: "
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<< NoModRef*100/ModRefSum << "%/" << Mod*100/ModRefSum << "%/"
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<< Ref*100/ModRefSum << "%/" << ModRef*100/ModRefSum << "%\n";
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}
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return false;
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}
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