1 files changed, 0 insertions, 609 deletions
diff --git a/contrib/llvm/lib/Analysis/IPA/GlobalsModRef.cpp b/contrib/llvm/lib/Analysis/IPA/GlobalsModRef.cpp
deleted file mode 100644
index 28fb49c..0000000
--- a/contrib/llvm/lib/Analysis/IPA/GlobalsModRef.cpp
+++ /dev/null
@@ -1,609 +0,0 @@
-//===- GlobalsModRef.cpp - Simple Mod/Ref Analysis for Globals ------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This simple pass provides alias and mod/ref information for global values
-// that do not have their address taken, and keeps track of whether functions
-// read or write memory (are "pure").  For this simple (but very common) case,
-// we can provide pretty accurate and useful information.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Analysis/Passes.h"
-#include "llvm/ADT/SCCIterator.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/Analysis/AliasAnalysis.h"
-#include "llvm/Analysis/CallGraph.h"
-#include "llvm/Analysis/MemoryBuiltins.h"
-#include "llvm/Analysis/ValueTracking.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/InstIterator.h"
-#include "llvm/IR/Instructions.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/CommandLine.h"
-#include <set>
-using namespace llvm;
-
-#define DEBUG_TYPE "globalsmodref-aa"
-
-STATISTIC(NumNonAddrTakenGlobalVars,
-          "Number of global vars without address taken");
-STATISTIC(NumNonAddrTakenFunctions,"Number of functions without address taken");
-STATISTIC(NumNoMemFunctions, "Number of functions that do not access memory");
-STATISTIC(NumReadMemFunctions, "Number of functions that only read memory");
-STATISTIC(NumIndirectGlobalVars, "Number of indirect global objects");
-
-namespace {
-/// FunctionRecord - One instance of this structure is stored for every
-/// function in the program.  Later, the entries for these functions are
-/// removed if the function is found to call an external function (in which
-/// case we know nothing about it.
-struct FunctionRecord {
-  /// GlobalInfo - Maintain mod/ref info for all of the globals without
-  /// addresses taken that are read or written (transitively) by this
-  /// function.
-  std::map<const GlobalValue *, unsigned> GlobalInfo;
-
-  /// MayReadAnyGlobal - May read global variables, but it is not known which.
-  bool MayReadAnyGlobal;
-
-  unsigned getInfoForGlobal(const GlobalValue *GV) const {
-    unsigned Effect = MayReadAnyGlobal ? AliasAnalysis::Ref : 0;
-    std::map<const GlobalValue *, unsigned>::const_iterator I =
-        GlobalInfo.find(GV);
-    if (I != GlobalInfo.end())
-      Effect |= I->second;
-    return Effect;
-  }
-
-  /// FunctionEffect - Capture whether or not this function reads or writes to
-  /// ANY memory.  If not, we can do a lot of aggressive analysis on it.
-  unsigned FunctionEffect;
-
-  FunctionRecord() : MayReadAnyGlobal(false), FunctionEffect(0) {}
-};
-
-/// GlobalsModRef - The actual analysis pass.
-class GlobalsModRef : public ModulePass, public AliasAnalysis {
-  /// NonAddressTakenGlobals - The globals that do not have their addresses
-  /// taken.
-  std::set<const GlobalValue *> NonAddressTakenGlobals;
-
-  /// IndirectGlobals - The memory pointed to by this global is known to be
-  /// 'owned' by the global.
-  std::set<const GlobalValue *> IndirectGlobals;
-
-  /// AllocsForIndirectGlobals - If an instruction allocates memory for an
-  /// indirect global, this map indicates which one.
-  std::map<const Value *, const GlobalValue *> AllocsForIndirectGlobals;
-
-  /// FunctionInfo - For each function, keep track of what globals are
-  /// modified or read.
-  std::map<const Function *, FunctionRecord> FunctionInfo;
-
-public:
-  static char ID;
-  GlobalsModRef() : ModulePass(ID) {
-    initializeGlobalsModRefPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnModule(Module &M) override {
-    InitializeAliasAnalysis(this, &M.getDataLayout());
-
-    // Find non-addr taken globals.
-    AnalyzeGlobals(M);
-
-    // Propagate on CG.
-    AnalyzeCallGraph(getAnalysis<CallGraphWrapperPass>().getCallGraph(), M);
-    return false;
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AliasAnalysis::getAnalysisUsage(AU);
-    AU.addRequired<CallGraphWrapperPass>();
-    AU.setPreservesAll(); // Does not transform code
-  }
-
-  //------------------------------------------------
-  // Implement the AliasAnalysis API
-  //
-  AliasResult alias(const MemoryLocation &LocA,
-                    const MemoryLocation &LocB) override;
-  ModRefResult getModRefInfo(ImmutableCallSite CS,
-                             const MemoryLocation &Loc) override;
-  ModRefResult getModRefInfo(ImmutableCallSite CS1,
-                             ImmutableCallSite CS2) override {
-    return AliasAnalysis::getModRefInfo(CS1, CS2);
-  }
-
-  /// getModRefBehavior - Return the behavior of the specified function if
-  /// called from the specified call site.  The call site may be null in which
-  /// case the most generic behavior of this function should be returned.
-  ModRefBehavior getModRefBehavior(const Function *F) override {
-    ModRefBehavior Min = UnknownModRefBehavior;
-
-    if (FunctionRecord *FR = getFunctionInfo(F)) {
-      if (FR->FunctionEffect == 0)
-        Min = DoesNotAccessMemory;
-      else if ((FR->FunctionEffect & Mod) == 0)
-        Min = OnlyReadsMemory;
-    }
-
-    return ModRefBehavior(AliasAnalysis::getModRefBehavior(F) & Min);
-  }
-
-  /// getModRefBehavior - Return the behavior of the specified function if
-  /// called from the specified call site.  The call site may be null in which
-  /// case the most generic behavior of this function should be returned.
-  ModRefBehavior getModRefBehavior(ImmutableCallSite CS) override {
-    ModRefBehavior Min = UnknownModRefBehavior;
-
-    if (const Function *F = CS.getCalledFunction())
-      if (FunctionRecord *FR = getFunctionInfo(F)) {
-        if (FR->FunctionEffect == 0)
-          Min = DoesNotAccessMemory;
-        else if ((FR->FunctionEffect & Mod) == 0)
-          Min = OnlyReadsMemory;
-      }
-
-    return ModRefBehavior(AliasAnalysis::getModRefBehavior(CS) & Min);
-  }
-
-  void deleteValue(Value *V) override;
-  void addEscapingUse(Use &U) override;
-
-  /// 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.
-  void *getAdjustedAnalysisPointer(AnalysisID PI) override {
-    if (PI == &AliasAnalysis::ID)
-      return (AliasAnalysis *)this;
-    return this;
-  }
-
-private:
-  /// getFunctionInfo - Return the function info for the function, or null if
-  /// we don't have anything useful to say about it.
-  FunctionRecord *getFunctionInfo(const Function *F) {
-    std::map<const Function *, FunctionRecord>::iterator I =
-        FunctionInfo.find(F);
-    if (I != FunctionInfo.end())
-      return &I->second;
-    return nullptr;
-  }
-
-  void AnalyzeGlobals(Module &M);
-  void AnalyzeCallGraph(CallGraph &CG, Module &M);
-  bool AnalyzeUsesOfPointer(Value *V, std::vector<Function *> &Readers,
-                            std::vector<Function *> &Writers,
-                            GlobalValue *OkayStoreDest = nullptr);
-  bool AnalyzeIndirectGlobalMemory(GlobalValue *GV);
-};
-}
-
-char GlobalsModRef::ID = 0;
-INITIALIZE_AG_PASS_BEGIN(GlobalsModRef, AliasAnalysis, "globalsmodref-aa",
-                         "Simple mod/ref analysis for globals", false, true,
-                         false)
-INITIALIZE_PASS_DEPENDENCY(CallGraphWrapperPass)
-INITIALIZE_AG_PASS_END(GlobalsModRef, AliasAnalysis, "globalsmodref-aa",
-                       "Simple mod/ref analysis for globals", false, true,
-                       false)
-
-Pass *llvm::createGlobalsModRefPass() { return new GlobalsModRef(); }
-
-/// AnalyzeGlobals - Scan through the users of all of the internal
-/// GlobalValue's in the program.  If none of them have their "address taken"
-/// (really, their address passed to something nontrivial), record this fact,
-/// and record the functions that they are used directly in.
-void GlobalsModRef::AnalyzeGlobals(Module &M) {
-  std::vector<Function *> Readers, Writers;
-  for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
-    if (I->hasLocalLinkage()) {
-      if (!AnalyzeUsesOfPointer(I, Readers, Writers)) {
-        // Remember that we are tracking this global.
-        NonAddressTakenGlobals.insert(I);
-        ++NumNonAddrTakenFunctions;
-      }
-      Readers.clear();
-      Writers.clear();
-    }
-
-  for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E;
-       ++I)
-    if (I->hasLocalLinkage()) {
-      if (!AnalyzeUsesOfPointer(I, Readers, Writers)) {
-        // Remember that we are tracking this global, and the mod/ref fns
-        NonAddressTakenGlobals.insert(I);
-
-        for (unsigned i = 0, e = Readers.size(); i != e; ++i)
-          FunctionInfo[Readers[i]].GlobalInfo[I] |= Ref;
-
-        if (!I->isConstant()) // No need to keep track of writers to constants
-          for (unsigned i = 0, e = Writers.size(); i != e; ++i)
-            FunctionInfo[Writers[i]].GlobalInfo[I] |= Mod;
-        ++NumNonAddrTakenGlobalVars;
-
-        // If this global holds a pointer type, see if it is an indirect global.
-        if (I->getType()->getElementType()->isPointerTy() &&
-            AnalyzeIndirectGlobalMemory(I))
-          ++NumIndirectGlobalVars;
-      }
-      Readers.clear();
-      Writers.clear();
-    }
-}
-
-/// AnalyzeUsesOfPointer - Look at all of the users of the specified pointer.
-/// If this is used by anything complex (i.e., the address escapes), return
-/// true.  Also, while we are at it, keep track of those functions that read and
-/// write to the value.
-///
-/// If OkayStoreDest is non-null, stores into this global are allowed.
-bool GlobalsModRef::AnalyzeUsesOfPointer(Value *V,
-                                         std::vector<Function *> &Readers,
-                                         std::vector<Function *> &Writers,
-                                         GlobalValue *OkayStoreDest) {
-  if (!V->getType()->isPointerTy())
-    return true;
-
-  for (Use &U : V->uses()) {
-    User *I = U.getUser();
-    if (LoadInst *LI = dyn_cast<LoadInst>(I)) {
-      Readers.push_back(LI->getParent()->getParent());
-    } else if (StoreInst *SI = dyn_cast<StoreInst>(I)) {
-      if (V == SI->getOperand(1)) {
-        Writers.push_back(SI->getParent()->getParent());
-      } else if (SI->getOperand(1) != OkayStoreDest) {
-        return true; // Storing the pointer
-      }
-    } else if (Operator::getOpcode(I) == Instruction::GetElementPtr) {
-      if (AnalyzeUsesOfPointer(I, Readers, Writers))
-        return true;
-    } else if (Operator::getOpcode(I) == Instruction::BitCast) {
-      if (AnalyzeUsesOfPointer(I, Readers, Writers, OkayStoreDest))
-        return true;
-    } else if (auto CS = CallSite(I)) {
-      // Make sure that this is just the function being called, not that it is
-      // passing into the function.
-      if (!CS.isCallee(&U)) {
-        // Detect calls to free.
-        if (isFreeCall(I, TLI))
-          Writers.push_back(CS->getParent()->getParent());
-        else
-          return true; // Argument of an unknown call.
-      }
-    } else if (ICmpInst *ICI = dyn_cast<ICmpInst>(I)) {
-      if (!isa<ConstantPointerNull>(ICI->getOperand(1)))
-        return true; // Allow comparison against null.
-    } else {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-/// AnalyzeIndirectGlobalMemory - We found an non-address-taken global variable
-/// which holds a pointer type.  See if the global always points to non-aliased
-/// heap memory: that is, all initializers of the globals are allocations, and
-/// those allocations have no use other than initialization of the global.
-/// Further, all loads out of GV must directly use the memory, not store the
-/// pointer somewhere.  If this is true, we consider the memory pointed to by
-/// GV to be owned by GV and can disambiguate other pointers from it.
-bool GlobalsModRef::AnalyzeIndirectGlobalMemory(GlobalValue *GV) {
-  // Keep track of values related to the allocation of the memory, f.e. the
-  // value produced by the malloc call and any casts.
-  std::vector<Value *> AllocRelatedValues;
-
-  // Walk the user list of the global.  If we find anything other than a direct
-  // load or store, bail out.
-  for (User *U : GV->users()) {
-    if (LoadInst *LI = dyn_cast<LoadInst>(U)) {
-      // The pointer loaded from the global can only be used in simple ways:
-      // we allow addressing of it and loading storing to it.  We do *not* allow
-      // storing the loaded pointer somewhere else or passing to a function.
-      std::vector<Function *> ReadersWriters;
-      if (AnalyzeUsesOfPointer(LI, ReadersWriters, ReadersWriters))
-        return false; // Loaded pointer escapes.
-      // TODO: Could try some IP mod/ref of the loaded pointer.
-    } else if (StoreInst *SI = dyn_cast<StoreInst>(U)) {
-      // Storing the global itself.
-      if (SI->getOperand(0) == GV)
-        return false;
-
-      // If storing the null pointer, ignore it.
-      if (isa<ConstantPointerNull>(SI->getOperand(0)))
-        continue;
-
-      // Check the value being stored.
-      Value *Ptr = GetUnderlyingObject(SI->getOperand(0),
-                                       GV->getParent()->getDataLayout());
-
-      if (!isAllocLikeFn(Ptr, TLI))
-        return false; // Too hard to analyze.
-
-      // Analyze all uses of the allocation.  If any of them are used in a
-      // non-simple way (e.g. stored to another global) bail out.
-      std::vector<Function *> ReadersWriters;
-      if (AnalyzeUsesOfPointer(Ptr, ReadersWriters, ReadersWriters, GV))
-        return false; // Loaded pointer escapes.
-
-      // Remember that this allocation is related to the indirect global.
-      AllocRelatedValues.push_back(Ptr);
-    } else {
-      // Something complex, bail out.
-      return false;
-    }
-  }
-
-  // Okay, this is an indirect global.  Remember all of the allocations for
-  // this global in AllocsForIndirectGlobals.
-  while (!AllocRelatedValues.empty()) {
-    AllocsForIndirectGlobals[AllocRelatedValues.back()] = GV;
-    AllocRelatedValues.pop_back();
-  }
-  IndirectGlobals.insert(GV);
-  return true;
-}
-
-/// AnalyzeCallGraph - At this point, we know the functions where globals are
-/// immediately stored to and read from.  Propagate this information up the call
-/// graph to all callers and compute the mod/ref info for all memory for each
-/// function.
-void GlobalsModRef::AnalyzeCallGraph(CallGraph &CG, Module &M) {
-  // We do a bottom-up SCC traversal of the call graph.  In other words, we
-  // visit all callees before callers (leaf-first).
-  for (scc_iterator<CallGraph *> I = scc_begin(&CG); !I.isAtEnd(); ++I) {
-    const std::vector<CallGraphNode *> &SCC = *I;
-    assert(!SCC.empty() && "SCC with no functions?");
-
-    if (!SCC[0]->getFunction()) {
-      // Calls externally - can't say anything useful.  Remove any existing
-      // function records (may have been created when scanning globals).
-      for (unsigned i = 0, e = SCC.size(); i != e; ++i)
-        FunctionInfo.erase(SCC[i]->getFunction());
-      continue;
-    }
-
-    FunctionRecord &FR = FunctionInfo[SCC[0]->getFunction()];
-
-    bool KnowNothing = false;
-    unsigned FunctionEffect = 0;
-
-    // Collect the mod/ref properties due to called functions.  We only compute
-    // one mod-ref set.
-    for (unsigned i = 0, e = SCC.size(); i != e && !KnowNothing; ++i) {
-      Function *F = SCC[i]->getFunction();
-      if (!F) {
-        KnowNothing = true;
-        break;
-      }
-
-      if (F->isDeclaration()) {
-        // Try to get mod/ref behaviour from function attributes.
-        if (F->doesNotAccessMemory()) {
-          // Can't do better than that!
-        } else if (F->onlyReadsMemory()) {
-          FunctionEffect |= Ref;
-          if (!F->isIntrinsic())
-            // This function might call back into the module and read a global -
-            // consider every global as possibly being read by this function.
-            FR.MayReadAnyGlobal = true;
-        } else {
-          FunctionEffect |= ModRef;
-          // Can't say anything useful unless it's an intrinsic - they don't
-          // read or write global variables of the kind considered here.
-          KnowNothing = !F->isIntrinsic();
-        }
-        continue;
-      }
-
-      for (CallGraphNode::iterator CI = SCC[i]->begin(), E = SCC[i]->end();
-           CI != E && !KnowNothing; ++CI)
-        if (Function *Callee = CI->second->getFunction()) {
-          if (FunctionRecord *CalleeFR = getFunctionInfo(Callee)) {
-            // Propagate function effect up.
-            FunctionEffect |= CalleeFR->FunctionEffect;
-
-            // Incorporate callee's effects on globals into our info.
-            for (const auto &G : CalleeFR->GlobalInfo)
-              FR.GlobalInfo[G.first] |= G.second;
-            FR.MayReadAnyGlobal |= CalleeFR->MayReadAnyGlobal;
-          } else {
-            // Can't say anything about it.  However, if it is inside our SCC,
-            // then nothing needs to be done.
-            CallGraphNode *CalleeNode = CG[Callee];
-            if (std::find(SCC.begin(), SCC.end(), CalleeNode) == SCC.end())
-              KnowNothing = true;
-          }
-        } else {
-          KnowNothing = true;
-        }
-    }
-
-    // If we can't say anything useful about this SCC, remove all SCC functions
-    // from the FunctionInfo map.
-    if (KnowNothing) {
-      for (unsigned i = 0, e = SCC.size(); i != e; ++i)
-        FunctionInfo.erase(SCC[i]->getFunction());
-      continue;
-    }
-
-    // Scan the function bodies for explicit loads or stores.
-    for (auto *Node : SCC) {
-      if (FunctionEffect == ModRef)
-        break; // The mod/ref lattice saturates here.
-      for (Instruction &I : inst_range(Node->getFunction())) {
-        if (FunctionEffect == ModRef)
-          break; // The mod/ref lattice saturates here.
-
-        // We handle calls specially because the graph-relevant aspects are
-        // handled above.
-        if (auto CS = CallSite(&I)) {
-          if (isAllocationFn(&I, TLI) || isFreeCall(&I, TLI)) {
-            // FIXME: It is completely unclear why this is necessary and not
-            // handled by the above graph code.
-            FunctionEffect |= ModRef;
-          } else if (Function *Callee = CS.getCalledFunction()) {
-            // The callgraph doesn't include intrinsic calls.
-            if (Callee->isIntrinsic()) {
-              ModRefBehavior Behaviour =
-                  AliasAnalysis::getModRefBehavior(Callee);
-              FunctionEffect |= (Behaviour & ModRef);
-            }
-          }
-          continue;
-        }
-
-        // All non-call instructions we use the primary predicates for whether
-        // thay read or write memory.
-        if (I.mayReadFromMemory())
-          FunctionEffect |= Ref;
-        if (I.mayWriteToMemory())
-          FunctionEffect |= Mod;
-      }
-    }
-
-    if ((FunctionEffect & Mod) == 0)
-      ++NumReadMemFunctions;
-    if (FunctionEffect == 0)
-      ++NumNoMemFunctions;
-    FR.FunctionEffect = FunctionEffect;
-
-    // Finally, now that we know the full effect on this SCC, clone the
-    // information to each function in the SCC.
-    for (unsigned i = 1, e = SCC.size(); i != e; ++i)
-      FunctionInfo[SCC[i]->getFunction()] = FR;
-  }
-}
-
-/// alias - If one of the pointers is to a global that we are tracking, and the
-/// other is some random pointer, we know there cannot be an alias, because the
-/// address of the global isn't taken.
-AliasResult GlobalsModRef::alias(const MemoryLocation &LocA,
-                                 const MemoryLocation &LocB) {
-  // Get the base object these pointers point to.
-  const Value *UV1 = GetUnderlyingObject(LocA.Ptr, *DL);
-  const Value *UV2 = GetUnderlyingObject(LocB.Ptr, *DL);
-
-  // If either of the underlying values is a global, they may be non-addr-taken
-  // globals, which we can answer queries about.
-  const GlobalValue *GV1 = dyn_cast<GlobalValue>(UV1);
-  const GlobalValue *GV2 = dyn_cast<GlobalValue>(UV2);
-  if (GV1 || GV2) {
-    // If the global's address is taken, pretend we don't know it's a pointer to
-    // the global.
-    if (GV1 && !NonAddressTakenGlobals.count(GV1))
-      GV1 = nullptr;
-    if (GV2 && !NonAddressTakenGlobals.count(GV2))
-      GV2 = nullptr;
-
-    // If the two pointers are derived from two different non-addr-taken
-    // globals, or if one is and the other isn't, we know these can't alias.
-    if ((GV1 || GV2) && GV1 != GV2)
-      return NoAlias;
-
-    // Otherwise if they are both derived from the same addr-taken global, we
-    // can't know the two accesses don't overlap.
-  }
-
-  // These pointers may be based on the memory owned by an indirect global.  If
-  // so, we may be able to handle this.  First check to see if the base pointer
-  // is a direct load from an indirect global.
-  GV1 = GV2 = nullptr;
-  if (const LoadInst *LI = dyn_cast<LoadInst>(UV1))
-    if (GlobalVariable *GV = dyn_cast<GlobalVariable>(LI->getOperand(0)))
-      if (IndirectGlobals.count(GV))
-        GV1 = GV;
-  if (const LoadInst *LI = dyn_cast<LoadInst>(UV2))
-    if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(LI->getOperand(0)))
-      if (IndirectGlobals.count(GV))
-        GV2 = GV;
-
-  // These pointers may also be from an allocation for the indirect global.  If
-  // so, also handle them.
-  if (AllocsForIndirectGlobals.count(UV1))
-    GV1 = AllocsForIndirectGlobals[UV1];
-  if (AllocsForIndirectGlobals.count(UV2))
-    GV2 = AllocsForIndirectGlobals[UV2];
-
-  // Now that we know whether the two pointers are related to indirect globals,
-  // use this to disambiguate the pointers.  If either pointer is based on an
-  // indirect global and if they are not both based on the same indirect global,
-  // they cannot alias.
-  if ((GV1 || GV2) && GV1 != GV2)
-    return NoAlias;
-
-  return AliasAnalysis::alias(LocA, LocB);
-}
-
-AliasAnalysis::ModRefResult
-GlobalsModRef::getModRefInfo(ImmutableCallSite CS, const MemoryLocation &Loc) {
-  unsigned Known = ModRef;
-
-  // If we are asking for mod/ref info of a direct call with a pointer to a
-  // global we are tracking, return information if we have it.
-  const DataLayout &DL = CS.getCaller()->getParent()->getDataLayout();
-  if (const GlobalValue *GV =
-          dyn_cast<GlobalValue>(GetUnderlyingObject(Loc.Ptr, DL)))
-    if (GV->hasLocalLinkage())
-      if (const Function *F = CS.getCalledFunction())
-        if (NonAddressTakenGlobals.count(GV))
-          if (const FunctionRecord *FR = getFunctionInfo(F))
-            Known = FR->getInfoForGlobal(GV);
-
-  if (Known == NoModRef)
-    return NoModRef; // No need to query other mod/ref analyses
-  return ModRefResult(Known & AliasAnalysis::getModRefInfo(CS, Loc));
-}
-
-//===----------------------------------------------------------------------===//
-// Methods to update the analysis as a result of the client transformation.
-//
-void GlobalsModRef::deleteValue(Value *V) {
-  if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
-    if (NonAddressTakenGlobals.erase(GV)) {
-      // This global might be an indirect global.  If so, remove it and remove
-      // any AllocRelatedValues for it.
-      if (IndirectGlobals.erase(GV)) {
-        // Remove any entries in AllocsForIndirectGlobals for this global.
-        for (std::map<const Value *, const GlobalValue *>::iterator
-                 I = AllocsForIndirectGlobals.begin(),
-                 E = AllocsForIndirectGlobals.end();
-             I != E;) {
-          if (I->second == GV) {
-            AllocsForIndirectGlobals.erase(I++);
-          } else {
-            ++I;
-          }
-        }
-      }
-    }
-  }
-
-  // Otherwise, if this is an allocation related to an indirect global, remove
-  // it.
-  AllocsForIndirectGlobals.erase(V);
-
-  AliasAnalysis::deleteValue(V);
-}
-
-void GlobalsModRef::addEscapingUse(Use &U) {
-  // For the purposes of this analysis, it is conservatively correct to treat
-  // a newly escaping value equivalently to a deleted one.  We could perhaps
-  // be more precise by processing the new use and attempting to update our
-  // saved analysis results to accommodate it.
-  deleteValue(U);
-
-  AliasAnalysis::addEscapingUse(U);
-}