Identify AnonPointeeRegion by the symbol that is concretized.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60870 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Analysis/PathSensitive/MemRegion.h

@@ -237,25 +237,28 @@ public:
 ///  parameters or pointer globals. In RegionStoreManager, we assume pointer
 ///  parameters or globals point at some anonymous region. Such regions are not
 ///  the regions associated with the pointer variables themselves.  They are
-///  identified by the MemRegion of the pointer pointing to them. We create
-///  them lazily.
+///  identified by the symbols that are concretized. We create them lazily.
 
 class AnonPointeeRegion : public TypedRegion {
   friend class MemRegionManager;
-  // VD - the pointer variable that points at this region.
-  const TypedRegion* Pointer;
 
-  AnonPointeeRegion(const TypedRegion* r, MemRegion* sreg)
-    : TypedRegion(sreg, AnonPointeeRegionKind), Pointer(r) {}
+  // Sym - the symbol that is concretized.
+  SymbolRef Sym;
+
+  // Ty - the type of the region.
+  QualType T;
+
+  AnonPointeeRegion(SymbolRef sym, QualType t, MemRegion* sreg)
+    : TypedRegion(sreg, AnonPointeeRegionKind), Sym(sym), T(t) {}
 
 public:
   QualType getType(ASTContext& C) const;
 
-  static void ProfileRegion(llvm::FoldingSetNodeID& ID, const TypedRegion* R,
+  static void ProfileRegion(llvm::FoldingSetNodeID& ID, SymbolRef Sym,
                             const MemRegion* superRegion);
 
   void Profile(llvm::FoldingSetNodeID& ID) const {
-    ProfileRegion(ID, Pointer, superRegion);
+    ProfileRegion(ID, Sym, superRegion);
   }
 
   static bool classof(const MemRegion* R) {
@@ -519,7 +522,7 @@ public:
 
   AnonTypedRegion* getAnonTypedRegion(QualType t, const MemRegion* superRegion);
 
-  AnonPointeeRegion* getAnonPointeeRegion(const TypedRegion* r);
+  AnonPointeeRegion* getAnonPointeeRegion(SymbolRef Sym, QualType T);
 
   bool hasStackStorage(const MemRegion* R);
 

lib/Analysis/MemRegion.cpp

@@ -52,18 +52,14 @@ void AnonTypedRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, QualType T,
 }
 
 QualType AnonPointeeRegion::getType(ASTContext& C) const {
-  QualType T = C.getCanonicalType(Pointer->getType(C));
-  PointerType* PTy = cast<PointerType>(T.getTypePtr());
-
-  QualType PointeeTy = C.getCanonicalType(PTy->getPointeeType());
-  return PointeeTy;
+  return C.getCanonicalType(T);
 }
 
 void AnonPointeeRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, 
-                                      const TypedRegion* R,
+                                      SymbolRef Sym,
                                       const MemRegion* superRegion) {
   ID.AddInteger((unsigned) AnonPointeeRegionKind);
-  ID.AddPointer(R);
+  Sym.Profile(ID);
   ID.AddPointer(superRegion);
 }
 
@@ -394,11 +390,12 @@ MemRegionManager::getAnonTypedRegion(QualType t, const MemRegion* superRegion) {
   return R;
 }
 
-AnonPointeeRegion* MemRegionManager::getAnonPointeeRegion(const TypedRegion* r) {
+AnonPointeeRegion* MemRegionManager::getAnonPointeeRegion(SymbolRef Sym,
+                                                          QualType T) {
   llvm::FoldingSetNodeID ID;
   MemRegion* superRegion = getUnknownRegion();
 
-  AnonPointeeRegion::ProfileRegion(ID, r, superRegion);
+  AnonPointeeRegion::ProfileRegion(ID, Sym, superRegion);
 
   void* InsertPos;
   MemRegion* data = Regions.FindNodeOrInsertPos(ID, InsertPos);
@@ -406,7 +403,7 @@ AnonPointeeRegion* MemRegionManager::getAnonPointeeRegion(const TypedRegion* r)
 
   if (!R) {
     R = (AnonPointeeRegion*) A.Allocate<AnonPointeeRegion>();
-    new (R) AnonPointeeRegion(r, superRegion);
+    new (R) AnonPointeeRegion(Sym, T, superRegion);
     Regions.InsertNode(R, InsertPos);
   }