[PM/AA] Remove the last of the legacy update API from AliasAnalysis as

part of simplifying its interface and usage in preparation for porting
to work with the new pass manager.

Note that this will likely expose that we have dead arguments, members,
and maybe even pass requirements for AA. I'll be cleaning those up in
seperate patches. This just zaps the actual update API.

Differential Revision: http://reviews.llvm.org/D11325

llvm-svn: 242881

llvm/include/llvm/Analysis/AliasAnalysis.h

@@ -507,26 +507,6 @@ class AliasAnalysis {
                                  uint64_t Size, const ModRefResult Mode) {
     return canInstructionRangeModRef(I1, I2, MemoryLocation(Ptr, Size), Mode);
   }
-
-  //===--------------------------------------------------------------------===//
-  /// Methods that clients should call when they transform the program to allow
-  /// alias analyses to update their internal data structures.  Note that these
-  /// methods may be called on any instruction, regardless of whether or not
-  /// they have pointer-analysis implications.
-  ///
-
-  /// deleteValue - This method should be called whenever an LLVM Value is
-  /// deleted from the program, for example when an instruction is found to be
-  /// redundant and is eliminated.
-  ///
-  virtual void deleteValue(Value *V);
-
-  /// replaceWithNewValue - This method is the obvious combination of the two
-  /// above, and it provided as a helper to simplify client code.
-  ///
-  void replaceWithNewValue(Value *Old, Value *New) {
-    deleteValue(Old);
-  }
 };
 
 /// isNoAliasCall - Return true if this pointer is returned by a noalias

llvm/lib/Analysis/AliasAnalysis.cpp

@@ -66,11 +66,6 @@ AliasAnalysis::getArgModRefInfo(ImmutableCallSite CS, unsigned ArgIdx) {
   return AA->getArgModRefInfo(CS, ArgIdx);
 }
 
-void AliasAnalysis::deleteValue(Value *V) {
-  assert(AA && "AA didn't call InitializeAliasAnalysis in its run method!");
-  AA->deleteValue(V);
-}
-
 AliasAnalysis::ModRefResult
 AliasAnalysis::getModRefInfo(Instruction *I, ImmutableCallSite Call) {
   // We may have two calls

llvm/lib/Analysis/AliasDebugger.cpp

@@ -119,12 +119,6 @@ namespace {
       assert(Vals.find(Loc.Ptr) != Vals.end() && "Never seen value in AA before");
       return AliasAnalysis::pointsToConstantMemory(Loc, OrLocal);
     }
-
-    void deleteValue(Value *V) override {
-      assert(Vals.find(V) != Vals.end() && "Never seen value in AA before");
-      AliasAnalysis::deleteValue(V);
-    }
-
   };
 }
 

llvm/lib/Analysis/AliasSetTracker.cpp

@@ -505,9 +505,6 @@ bool AliasSetTracker::remove(Instruction *I) {
 // dangling pointers to deleted instructions.
 //
 void AliasSetTracker::deleteValue(Value *PtrVal) {
-  // Notify the alias analysis implementation that this value is gone.
-  AA.deleteValue(PtrVal);
-
   // If this is a call instruction, remove the callsite from the appropriate
   // AliasSet (if present).
   if (Instruction *Inst = dyn_cast<Instruction>(PtrVal)) {

llvm/lib/Analysis/MemoryDependenceAnalysis.cpp

@@ -1618,7 +1618,6 @@ void MemoryDependenceAnalysis::removeInstruction(Instruction *RemInst) {
 
 
   assert(!NonLocalDeps.count(RemInst) && "RemInst got reinserted?");
-  AA->deleteValue(RemInst);
   DEBUG(verifyRemoved(RemInst));
 }
 /// verifyRemoved - Verify that the specified instruction does not occur

llvm/lib/Analysis/NoAliasAnalysis.cpp

@@ -71,8 +71,6 @@ namespace {
       return ModRef;
     }
 
-    void deleteValue(Value *V) 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

llvm/lib/Transforms/IPO/ArgumentPromotion.cpp

@@ -501,7 +501,6 @@ bool ArgPromotion::isSafeToPromoteArgument(Argument *Arg,
       if (GEP->use_empty()) {
         // Dead GEP's cause trouble later.  Just remove them if we run into
         // them.
-        getAnalysis<AliasAnalysis>().deleteValue(GEP);
         GEP->eraseFromParent();
         // TODO: This runs the above loop over and over again for dead GEPs
         // Couldn't we just do increment the UI iterator earlier and erase the
@@ -743,10 +742,6 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
   F->getParent()->getFunctionList().insert(F, NF);
   NF->takeName(F);
 
-  // Get the alias analysis information that we need to update to reflect our
-  // changes.
-  AliasAnalysis &AA = getAnalysis<AliasAnalysis>();
-
   // Get the callgraph information that we need to update to reflect our
   // changes.
   CallGraph &CG = getAnalysis<CallGraphWrapperPass>().getCallGraph();
@@ -873,10 +868,6 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
     Args.clear();
     AttributesVec.clear();
 
-    // Update the alias analysis implementation to know that we are replacing
-    // the old call with a new one.
-    AA.replaceWithNewValue(Call, New);
-
     // Update the callgraph to know that the callsite has been transformed.
     CallGraphNode *CalleeNode = CG[Call->getParent()->getParent()];
     CalleeNode->replaceCallEdge(CS, CallSite(New), NF_CGN);
@@ -906,7 +897,6 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
       // new version.
       I->replaceAllUsesWith(I2);
       I2->takeName(I);
-      AA.replaceWithNewValue(I, I2);
       ++I2;
       continue;
     }
@@ -935,7 +925,6 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
       // Anything that used the arg should now use the alloca.
       I->replaceAllUsesWith(TheAlloca);
       TheAlloca->takeName(I);
-      AA.replaceWithNewValue(I, TheAlloca);
 
       // If the alloca is used in a call, we must clear the tail flag since
       // the callee now uses an alloca from the caller.
@@ -948,10 +937,8 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
       continue;
     }
 
-    if (I->use_empty()) {
-      AA.deleteValue(I);
+    if (I->use_empty())
       continue;
-    }
 
     // Otherwise, if we promoted this argument, then all users are load
     // instructions (or GEPs with only load users), and all loads should be
@@ -964,7 +951,6 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
                "Load element should sort to front!");
         I2->setName(I->getName()+".val");
         LI->replaceAllUsesWith(I2);
-        AA.replaceWithNewValue(LI, I2);
         LI->eraseFromParent();
         DEBUG(dbgs() << "*** Promoted load of argument '" << I->getName()
               << "' in function '" << F->getName() << "'\n");
@@ -1001,10 +987,8 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
         while (!GEP->use_empty()) {
           LoadInst *L = cast<LoadInst>(GEP->user_back());
           L->replaceAllUsesWith(TheArg);
-          AA.replaceWithNewValue(L, TheArg);
           L->eraseFromParent();
         }
-        AA.deleteValue(GEP);
         GEP->eraseFromParent();
       }
     }
@@ -1013,10 +997,6 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
     std::advance(I2, ArgIndices.size());
   }
 
-  // Tell the alias analysis that the old function is about to disappear.
-  AA.replaceWithNewValue(F, NF);
-
-
   NF_CGN->stealCalledFunctionsFrom(CG[F]);
 
   // Now that the old function is dead, delete it.  If there is a dangling

llvm/lib/Transforms/Utils/BasicBlockUtils.cpp

@@ -77,8 +77,6 @@ void llvm::FoldSingleEntryPHINodes(BasicBlock *BB, AliasAnalysis *AA,
 
     if (MemDep)
       MemDep->removeInstruction(PN);  // Memdep updates AA itself.
-    else if (AA && isa<PointerType>(PN->getType()))
-      AA->deleteValue(PN);
 
     PN->eraseFromParent();
   }

llvm/lib/Transforms/Utils/LoopSimplify.cpp

@@ -216,7 +216,6 @@ static PHINode *findPHIToPartitionLoops(Loop *L, AliasAnalysis *AA,
     if (Value *V = SimplifyInstruction(PN, DL, nullptr, DT, AC)) {
       // This is a degenerate PHI already, don't modify it!
       PN->replaceAllUsesWith(V);
-      if (AA) AA->deleteValue(PN);
       PN->eraseFromParent();
       continue;
     }
@@ -443,7 +442,6 @@ static BasicBlock *insertUniqueBackedgeBlock(Loop *L, BasicBlock *Preheader,
     // eliminate the PHI Node.
     if (HasUniqueIncomingValue) {
       NewPN->replaceAllUsesWith(UniqueValue);
-      if (AA) AA->deleteValue(NewPN);
       BEBlock->getInstList().erase(NewPN);
     }
   }
@@ -618,7 +616,6 @@ static bool simplifyOneLoop(Loop *L, SmallVectorImpl<Loop *> &Worklist,
   for (BasicBlock::iterator I = L->getHeader()->begin();
        (PN = dyn_cast<PHINode>(I++)); )
     if (Value *V = SimplifyInstruction(PN, DL, nullptr, DT, AC)) {
-      if (AA) AA->deleteValue(PN);
       if (SE) SE->forgetValue(PN);
       PN->replaceAllUsesWith(V);
       PN->eraseFromParent();

llvm/lib/Transforms/Vectorize/BBVectorize.cpp

@@ -2806,11 +2806,8 @@ namespace {
                      Instruction *J, Instruction *K,
                      Instruction *&InsertionPt,
                      Instruction *&K1, Instruction *&K2) {
-    if (isa<StoreInst>(I)) {
-      AA->replaceWithNewValue(I, K);
-      AA->replaceWithNewValue(J, K);
+    if (isa<StoreInst>(I))
       return;
-    }
 
     Type *IType = I->getType();
     Type *JType = J->getType();
@@ -3144,8 +3141,6 @@ namespace {
       if (!isa<StoreInst>(I)) {
         L->replaceAllUsesWith(K1);
         H->replaceAllUsesWith(K2);
-        AA->replaceWithNewValue(L, K1);
-        AA->replaceWithNewValue(H, K2);
       }
 
       // Instructions that may read from memory may be in the load move set.