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b1e225bebc
.cpp file to make the header much less noisy. Also makes it easy to use a static helper rather than a public method for printing lines of stats. llvm-svn: 245006
166 lines
5.1 KiB
C++
166 lines
5.1 KiB
C++
//===- AliasAnalysisCounter.cpp - Alias Analysis Query Counter ------------===//
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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 pass which can be used to count how many alias queries
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// are being made and how the alias analysis implementation being used responds.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/AliasAnalysisCounter.h"
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/IR/Module.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/ErrorHandling.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("count-aa-print-all-queries", cl::ReallyHidden,
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cl::init(true));
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static cl::opt<bool> PrintAllFailures("count-aa-print-all-failed-queries",
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cl::ReallyHidden);
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char AliasAnalysisCounter::ID = 0;
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INITIALIZE_AG_PASS(AliasAnalysisCounter, AliasAnalysis, "count-aa",
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"Count Alias Analysis Query Responses", false, true, false)
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ModulePass *llvm::createAliasAnalysisCounterPass() {
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return new AliasAnalysisCounter();
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}
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AliasAnalysisCounter::AliasAnalysisCounter() : ModulePass(ID) {
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initializeAliasAnalysisCounterPass(*PassRegistry::getPassRegistry());
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No = May = Partial = Must = 0;
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NoMR = JustRef = JustMod = MR = 0;
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}
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static void printLine(const char *Desc, unsigned Val, unsigned Sum) {
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errs() << " " << Val << " " << Desc << " responses (" << Val * 100 / Sum
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<< "%)\n";
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}
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AliasAnalysisCounter::~AliasAnalysisCounter() {
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unsigned AASum = No + May + Partial + Must;
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unsigned MRSum = NoMR + JustRef + JustMod + MR;
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if (AASum + MRSum) { // Print a report if any counted queries occurred...
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errs() << "\n===== Alias Analysis Counter Report =====\n"
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<< " Analysis counted:\n"
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<< " " << AASum << " Total Alias Queries Performed\n";
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if (AASum) {
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printLine("no alias", No, AASum);
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printLine("may alias", May, AASum);
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printLine("partial alias", Partial, AASum);
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printLine("must alias", Must, AASum);
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errs() << " Alias Analysis Counter Summary: " << No * 100 / AASum << "%/"
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<< May * 100 / AASum << "%/" << Partial * 100 / AASum << "%/"
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<< Must * 100 / AASum << "%\n\n";
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}
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errs() << " " << MRSum << " Total MRI_Mod/MRI_Ref Queries Performed\n";
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if (MRSum) {
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printLine("no mod/ref", NoMR, MRSum);
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printLine("ref", JustRef, MRSum);
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printLine("mod", JustMod, MRSum);
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printLine("mod/ref", MR, MRSum);
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errs() << " MRI_Mod/MRI_Ref Analysis Counter Summary: "
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<< NoMR * 100 / MRSum << "%/" << JustRef * 100 / MRSum << "%/"
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<< JustMod * 100 / MRSum << "%/" << MR * 100 / MRSum << "%\n\n";
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}
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}
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}
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bool AliasAnalysisCounter::runOnModule(Module &M) {
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this->M = &M;
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InitializeAliasAnalysis(this, &M.getDataLayout());
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return false;
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}
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void AliasAnalysisCounter::getAnalysisUsage(AnalysisUsage &AU) const {
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AliasAnalysis::getAnalysisUsage(AU);
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AU.addRequired<AliasAnalysis>();
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AU.setPreservesAll();
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}
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void *AliasAnalysisCounter::getAdjustedAnalysisPointer(AnalysisID PI) {
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if (PI == &AliasAnalysis::ID)
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return (AliasAnalysis *)this;
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return this;
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}
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AliasResult AliasAnalysisCounter::alias(const MemoryLocation &LocA,
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const MemoryLocation &LocB) {
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AliasResult R = getAnalysis<AliasAnalysis>().alias(LocA, LocB);
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const char *AliasString = nullptr;
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switch (R) {
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case NoAlias:
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No++;
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AliasString = "No alias";
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break;
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case MayAlias:
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May++;
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AliasString = "May alias";
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break;
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case PartialAlias:
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Partial++;
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AliasString = "Partial alias";
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break;
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case MustAlias:
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Must++;
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AliasString = "Must alias";
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break;
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}
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if (PrintAll || (PrintAllFailures && R == MayAlias)) {
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errs() << AliasString << ":\t";
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errs() << "[" << LocA.Size << "B] ";
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LocA.Ptr->printAsOperand(errs(), true, M);
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errs() << ", ";
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errs() << "[" << LocB.Size << "B] ";
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LocB.Ptr->printAsOperand(errs(), true, M);
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errs() << "\n";
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}
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return R;
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}
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ModRefInfo AliasAnalysisCounter::getModRefInfo(ImmutableCallSite CS,
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const MemoryLocation &Loc) {
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ModRefInfo R = getAnalysis<AliasAnalysis>().getModRefInfo(CS, Loc);
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const char *MRString = nullptr;
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switch (R) {
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case MRI_NoModRef:
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NoMR++;
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MRString = "MRI_NoModRef";
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break;
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case MRI_Ref:
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JustRef++;
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MRString = "JustRef";
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break;
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case MRI_Mod:
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JustMod++;
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MRString = "JustMod";
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break;
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case MRI_ModRef:
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MR++;
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MRString = "MRI_ModRef";
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break;
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}
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if (PrintAll || (PrintAllFailures && R == MRI_ModRef)) {
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errs() << MRString << ": Ptr: ";
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errs() << "[" << Loc.Size << "B] ";
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Loc.Ptr->printAsOperand(errs(), true, M);
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errs() << "\t<->" << *CS.getInstruction() << '\n';
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}
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return R;
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}
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