Fix static analyzer crash on code taking the address of a field. Fixes PR 11146.

llvm-svn: 153283

clang/include/clang/Analysis/Visitors/CFGRecStmtDeclVisitor.h

@@ -66,6 +66,7 @@ public:
         DISPATCH_CASE(Record)    // FIXME: Refine.  VisitStructDecl?
         DISPATCH_CASE(CXXRecord)
         DISPATCH_CASE(Enum)
+        DISPATCH_CASE(Field)
         DISPATCH_CASE(UsingDirective)
         DISPATCH_CASE(Using)
       default:
@@ -82,6 +83,7 @@ public:
   DEFAULT_DISPATCH(Typedef)
   DEFAULT_DISPATCH(Record)
   DEFAULT_DISPATCH(Enum)
+  DEFAULT_DISPATCH(Field)
   DEFAULT_DISPATCH(ObjCInterface)
   DEFAULT_DISPATCH(ObjCMethod)
   DEFAULT_DISPATCH(ObjCProtocol)

clang/lib/StaticAnalyzer/Core/ExprEngine.cpp

@@ -1384,6 +1384,13 @@ void ExprEngine::VisitCommonDeclRefExpr(const Expr *Ex, const NamedDecl *D,
                       ProgramPoint::PostLValueKind);
     return;
   }
+  if (isa<FieldDecl>(D)) {
+    // FIXME: Compute lvalue of fields.
+    Bldr.generateNode(Ex, Pred, state->BindExpr(Ex, LCtx, UnknownVal()),
+		      false, 0, ProgramPoint::PostLValueKind);
+    return;
+  }
+
   assert (false &&
           "ValueDecl support for this ValueDecl not implemented.");
 }

clang/test/Analysis/misc-ps-region-store.cpp

@@ -552,3 +552,19 @@ void PR11545_positive() {
   }
 }
 
+// Test handling taking the address of a field.  While the analyzer
+// currently doesn't do anything intelligent here, this previously
+// resulted in a crash.
+class PR11146 {
+public:
+  struct Entry;
+  void baz();
+};
+
+struct PR11146::Entry {
+  int x;
+};
+
+void PR11146::baz() {
+  (void) &Entry::x;
+}