X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FAnalysis%2FAliasAnalysisCounter.cpp;h=d947220e078df51b6d1a87d88b3fc61ef758fa14;hb=4032eaf98c63b0fb1f2418a1cdc56b72bc76c329;hp=ba41092128ba29ee7e287b0ac14052b4d2b21329;hpb=a89feb55e04fd4f25d7c09fb0c119fc9250b5b5a;p=oota-llvm.git

diff --git a/lib/Analysis/AliasAnalysisCounter.cpp b/lib/Analysis/AliasAnalysisCounter.cpp
index ba41092128b..d947220e078 100644
--- a/lib/Analysis/AliasAnalysisCounter.cpp
+++ b/lib/Analysis/AliasAnalysisCounter.cpp
@@ -1,68 +1,173 @@
 //===- AliasAnalysisCounter.cpp - Alias Analysis Query Counter ------------===//
 //
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
 // This file implements a pass which can be used to count how many alias queries
 // are being made and how the alias analysis implementation being used responds.
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/Analysis/Passes.h"
 #include "llvm/Pass.h"
-#include <iostream>
+#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/Assembly/Writer.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+static cl::opt<bool>
+PrintAll("count-aa-print-all-queries", cl::ReallyHidden, cl::init(true));
+static cl::opt<bool>
+PrintAllFailures("count-aa-print-all-failed-queries", cl::ReallyHidden);
 
 namespace {
-  class AliasAnalysisCounter : public Pass, public AliasAnalysis {
-    unsigned No, May, Must;
-    const char *Name;
+  class AliasAnalysisCounter : public ModulePass, public AliasAnalysis {
+    unsigned No, May, Partial, Must;
+    unsigned NoMR, JustRef, JustMod, MR;
+    Module *M;
   public:
-    AliasAnalysisCounter() : No(0), May(0), Must(0) {}
+    static char ID; // Class identification, replacement for typeinfo
+    AliasAnalysisCounter() : ModulePass(ID) {
+      initializeAliasAnalysisCounterPass(*PassRegistry::getPassRegistry());
+      No = May = Partial = Must = 0;
+      NoMR = JustRef = JustMod = MR = 0;
+    }
+
+    void printLine(const char *Desc, unsigned Val, unsigned Sum) {
+      errs() <<  "  " << Val << " " << Desc << " responses ("
+             << Val*100/Sum << "%)\n";
+    }
     ~AliasAnalysisCounter() {
-      unsigned Sum = No+May+Must;
-      if (Sum) {            // Print a report if any counted queries occurred...
-        std::cerr
-          << "\n===== Alias Analysis Counter Report =====\n"
-          << "  Analysis counted: " << Name << "\n"
-          << "  " << Sum << " Total Alias Queries Performed\n"
-          << "  " << No << " no alias responses (" << No*100/Sum << "%)\n"
-          << "  " << May << " may alias responses (" << May*100/Sum << "%)\n"
-          << "  " << Must << " must alias responses (" <<Must*100/Sum<<"%)\n"
-          << "  Alias Analysis Counter Summary: " << No*100/Sum << "%/"
-          << May*100/Sum << "%/" << Must*100/Sum<<"%\n\n";
+      unsigned AASum = No+May+Partial+Must;
+      unsigned MRSum = NoMR+JustRef+JustMod+MR;
+      if (AASum + MRSum) { // Print a report if any counted queries occurred...
+        errs() << "\n===== Alias Analysis Counter Report =====\n"
+               << "  Analysis counted:\n"
+               << "  " << AASum << " Total Alias Queries Performed\n";
+        if (AASum) {
+          printLine("no alias",     No, AASum);
+          printLine("may alias",   May, AASum);
+          printLine("partial alias", Partial, AASum);
+          printLine("must alias", Must, AASum);
+          errs() << "  Alias Analysis Counter Summary: " << No*100/AASum << "%/"
+                 << May*100/AASum << "%/"
+                 << Partial*100/AASum << "%/"
+                 << Must*100/AASum<<"%\n\n";
+        }
+
+        errs() << "  " << MRSum    << " Total Mod/Ref Queries Performed\n";
+        if (MRSum) {
+          printLine("no mod/ref",    NoMR, MRSum);
+          printLine("ref",        JustRef, MRSum);
+          printLine("mod",        JustMod, MRSum);
+          printLine("mod/ref",         MR, MRSum);
+          errs() << "  Mod/Ref Analysis Counter Summary: " <<NoMR*100/MRSum
+                 << "%/" << JustRef*100/MRSum << "%/" << JustMod*100/MRSum
+                 << "%/" << MR*100/MRSum <<"%\n\n";
+        }
       }
     }
 
-    bool run(Module &M) {
-      Name = dynamic_cast<Pass*>(&getAnalysis<AliasAnalysis>())->getPassName();
+    bool runOnModule(Module &M) {
+      this->M = &M;
+      InitializeAliasAnalysis(this);
       return false;
     }
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AliasAnalysis::getAnalysisUsage(AU);
       AU.addRequired<AliasAnalysis>();
       AU.setPreservesAll();
     }
 
-    Result count(Result R) {
-      switch (R) {
-      default: assert(0 && "Unknown alias type!");
-      case NoAlias:   No++; return NoAlias;
-      case MayAlias:  May++; return MayAlias;
-      case MustAlias: Must++; return MustAlias;
-      }
+    /// getAdjustedAnalysisPointer - This method is used when a pass implements
+    /// an analysis interface through multiple inheritance.  If needed, it
+    /// should override this to adjust the this pointer as needed for the
+    /// specified pass info.
+    virtual void *getAdjustedAnalysisPointer(AnalysisID PI) {
+      if (PI == &AliasAnalysis::ID)
+        return (AliasAnalysis*)this;
+      return this;
     }
     
+    // FIXME: We could count these too...
+    bool pointsToConstantMemory(const Location &Loc, bool OrLocal) {
+      return getAnalysis<AliasAnalysis>().pointsToConstantMemory(Loc, OrLocal);
+    }
+
     // Forwarding functions: just delegate to a real AA implementation, counting
     // the number of responses...
-    Result alias(const Value *V1, const Value *V2) {
-      return count(getAnalysis<AliasAnalysis>().alias(V1, V2));
-    }
-    Result canCallModify(const CallInst &CI, const Value *Ptr) {
-      return count(getAnalysis<AliasAnalysis>().canCallModify(CI, Ptr));
-    }
-    Result canInvokeModify(const InvokeInst &I, const Value *Ptr) {
-      return count(getAnalysis<AliasAnalysis>().canInvokeModify(I, Ptr));
+    AliasResult alias(const Location &LocA, const Location &LocB);
+
+    ModRefResult getModRefInfo(ImmutableCallSite CS,
+                               const Location &Loc);
+    ModRefResult getModRefInfo(ImmutableCallSite CS1,
+                               ImmutableCallSite CS2) {
+      return AliasAnalysis::getModRefInfo(CS1,CS2);
     }
   };
+}
+
+char AliasAnalysisCounter::ID = 0;
+INITIALIZE_AG_PASS(AliasAnalysisCounter, AliasAnalysis, "count-aa",
+                   "Count Alias Analysis Query Responses", false, true, false)
+
+ModulePass *llvm::createAliasAnalysisCounterPass() {
+  return new AliasAnalysisCounter();
+}
+
+AliasAnalysis::AliasResult
+AliasAnalysisCounter::alias(const Location &LocA, const Location &LocB) {
+  AliasResult R = getAnalysis<AliasAnalysis>().alias(LocA, LocB);
+
+  const char *AliasString;
+  switch (R) {
+  default: llvm_unreachable("Unknown alias type!");
+  case NoAlias:   No++;   AliasString = "No alias"; break;
+  case MayAlias:  May++;  AliasString = "May alias"; break;
+  case PartialAlias: Partial++; AliasString = "Partial alias"; break;
+  case MustAlias: Must++; AliasString = "Must alias"; break;
+  }
+
+  if (PrintAll || (PrintAllFailures && R == MayAlias)) {
+    errs() << AliasString << ":\t";
+    errs() << "[" << LocA.Size << "B] ";
+    WriteAsOperand(errs(), LocA.Ptr, true, M);
+    errs() << ", ";
+    errs() << "[" << LocB.Size << "B] ";
+    WriteAsOperand(errs(), LocB.Ptr, true, M);
+    errs() << "\n";
+  }
+
+  return R;
+}
+
+AliasAnalysis::ModRefResult
+AliasAnalysisCounter::getModRefInfo(ImmutableCallSite CS,
+                                    const Location &Loc) {
+  ModRefResult R = getAnalysis<AliasAnalysis>().getModRefInfo(CS, Loc);
+
+  const char *MRString;
+  switch (R) {
+  default:       llvm_unreachable("Unknown mod/ref type!");
+  case NoModRef: NoMR++;     MRString = "NoModRef"; break;
+  case Ref:      JustRef++;  MRString = "JustRef"; break;
+  case Mod:      JustMod++;  MRString = "JustMod"; break;
+  case ModRef:   MR++;       MRString = "ModRef"; break;
+  }
 
-  RegisterOpt<AliasAnalysisCounter>
-  X("count-aa", "Count Alias Analysis Query Responses");
-  RegisterAnalysisGroup<AliasAnalysis, AliasAnalysisCounter> Y;
+  if (PrintAll || (PrintAllFailures && R == ModRef)) {
+    errs() << MRString << ":  Ptr: ";
+    errs() << "[" << Loc.Size << "B] ";
+    WriteAsOperand(errs(), Loc.Ptr, true, M);
+    errs() << "\t<->" << *CS.getInstruction() << '\n';
+  }
+  return R;
 }