[analyzer] Remove obsolete ObjCPropRef SVal kind.

ObjC properties are handled through their semantic form of ObjCMessageExprs
and their wrapper PseudoObjectExprs, and have been for quite a while. The
syntactic ObjCPropertyRefExprs do not appear in the CFG and are not visited
by ExprEngine.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160458 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h b/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h
index 1f79f02..e495d15 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h
@@ -406,7 +406,7 @@
 
 namespace loc {
 
-enum Kind { GotoLabelKind, MemRegionKind, ConcreteIntKind, ObjCPropRefKind };
+enum Kind { GotoLabelKind, MemRegionKind, ConcreteIntKind };
 
 class GotoLabel : public Loc {
 public:
@@ -485,28 +485,6 @@
   }
 };
 
-/// \brief Pseudo-location SVal used by the ExprEngine to simulate a "load" or
-/// "store" of an ObjC property for the dot syntax.
-class ObjCPropRef : public Loc {
-public:
-  explicit ObjCPropRef(const ObjCPropertyRefExpr *E)
-    : Loc(ObjCPropRefKind, E) {}
-
-  const ObjCPropertyRefExpr *getPropRefExpr() const {
-    return static_cast<const ObjCPropertyRefExpr *>(Data);
-  }
-
-  // Implement isa<T> support.
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == LocKind &&
-           V->getSubKind() == ObjCPropRefKind;
-  }
-
-  static inline bool classof(const Loc* V) {
-    return V->getSubKind() == ObjCPropRefKind;
-  }
-};
-
 } // end ento::loc namespace
 } // end GR namespace
 
diff --git a/lib/StaticAnalyzer/Core/Environment.cpp b/lib/StaticAnalyzer/Core/Environment.cpp
index 53e8566..540eb88 100644
--- a/lib/StaticAnalyzer/Core/Environment.cpp
+++ b/lib/StaticAnalyzer/Core/Environment.cpp
@@ -96,8 +96,6 @@
       case Stmt::CXXBindTemporaryExprClass:
         E = cast<CXXBindTemporaryExpr>(E)->getSubExpr();
         continue;
-      case Stmt::ObjCPropertyRefExprClass:
-        return loc::ObjCPropRef(cast<ObjCPropertyRefExpr>(E));
       case Stmt::ObjCStringLiteralClass: {
         MemRegionManager &MRMgr = svalBuilder.getRegionManager();
         const ObjCStringLiteral *SL = cast<ObjCStringLiteral>(E);
diff --git a/lib/StaticAnalyzer/Core/ExprEngine.cpp b/lib/StaticAnalyzer/Core/ExprEngine.cpp
index 904fcf1..fb99d91 100644
--- a/lib/StaticAnalyzer/Core/ExprEngine.cpp
+++ b/lib/StaticAnalyzer/Core/ExprEngine.cpp
@@ -560,6 +560,10 @@
     case Expr::MSDependentExistsStmtClass:
       llvm_unreachable("Stmt should not be in analyzer evaluation loop");
 
+    case Stmt::ObjCSubscriptRefExprClass:
+    case Stmt::ObjCPropertyRefExprClass:
+      llvm_unreachable("These are handled by PseudoObjectExpr");
+
     case Stmt::GNUNullExprClass: {
       // GNU __null is a pointer-width integer, not an actual pointer.
       ProgramStateRef state = Pred->getState();
@@ -575,14 +579,6 @@
       Bldr.addNodes(Dst);
       break;
 
-    // FIXME.
-    case Stmt::ObjCSubscriptRefExprClass:
-      break;
-      
-    case Stmt::ObjCPropertyRefExprClass:
-      // Implicitly handled by Environment::getSVal().
-      break;
-
     case Stmt::ExprWithCleanupsClass:
       // Handled due to fully linearised CFG.
       break;
@@ -1699,10 +1695,6 @@
   // ProgramPoint if it is non-NULL, and LocationE otherwise.
   const Expr *StoreE = AssignE ? AssignE : LocationE;
 
-  if (isa<loc::ObjCPropRef>(location)) {
-    assert(false);
-  }
-
   // Evaluate the location (checks for bad dereferences).
   ExplodedNodeSet Tmp;
   evalLocation(Tmp, AssignE, LocationE, Pred, state, location, tag, false);
@@ -1727,7 +1719,6 @@
                           QualType LoadTy)
 {
   assert(!isa<NonLoc>(location) && "location cannot be a NonLoc.");
-  assert(!isa<loc::ObjCPropRef>(location));
 
   // Are we loading from a region?  This actually results in two loads; one
   // to fetch the address of the referenced value and one to fetch the
diff --git a/lib/StaticAnalyzer/Core/SVals.cpp b/lib/StaticAnalyzer/Core/SVals.cpp
index b94aff4..e32ffe2 100644
--- a/lib/StaticAnalyzer/Core/SVals.cpp
+++ b/lib/StaticAnalyzer/Core/SVals.cpp
@@ -309,22 +309,6 @@
     case loc::MemRegionKind:
       os << '&' << cast<loc::MemRegionVal>(this)->getRegion()->getString();
       break;
-    case loc::ObjCPropRefKind: {
-      const ObjCPropertyRefExpr *E = cast<loc::ObjCPropRef>(this)->getPropRefExpr();
-      os << "objc-prop{";
-      if (E->isSuperReceiver())
-        os << "super.";
-      else if (E->getBase())
-        os << "<base>.";
-
-      if (E->isImplicitProperty())
-        os << E->getImplicitPropertyGetter()->getSelector().getAsString();
-      else
-        os << E->getExplicitProperty()->getName();
-
-      os << "}";
-      break;
-    }
     default:
       llvm_unreachable("Pretty-printing not implemented for this Loc.");
   }