Provide basic static analyzer support for CXXTemporaryObjectExpr. Patch by Jim Goodnow II.

llvm-svn: 141433

clang/lib/StaticAnalyzer/Core/ExprEngine.cpp

@@ -455,7 +455,6 @@ void ExprEngine::Visit(const Stmt *S, ExplodedNode *Pred,
     case Stmt::CXXDependentScopeMemberExprClass:
     case Stmt::CXXForRangeStmtClass:
     case Stmt::CXXPseudoDestructorExprClass:
-    case Stmt::CXXTemporaryObjectExprClass:
     case Stmt::CXXThrowExprClass:
     case Stmt::CXXTryStmtClass:
     case Stmt::CXXTypeidExprClass:
@@ -628,6 +627,7 @@ void ExprEngine::Visit(const Stmt *S, ExplodedNode *Pred,
       break;
     }
 
+    case Stmt::CXXTemporaryObjectExprClass:
     case Stmt::CXXConstructExprClass: {
       const CXXConstructExpr *C = cast<CXXConstructExpr>(S);
       // For block-level CXXConstructExpr, we don't have a destination region.

clang/test/Analysis/misc-ps-cxx0x.cpp

@@ -21,3 +21,27 @@ void test_rdar10243398(RDar10243398 *p) {
   RDar10243398MemberFn q = &RDar10243398::bar;
   ((*p).*(q))(1);
 }
+
+// Tests for CXXTemporaryObjectExpr.
+struct X {
+    X( int *ip, int );
+};
+
+// Test to see if CXXTemporaryObjectExpr is being handled.
+int tempobj1()
+{
+  int j;
+  int i;
+  X a = X( &j, 1 );
+
+  return i; // expected-warning {{Undefined or garbage value returned to caller}}
+}
+
+// Test to see if CXXTemporaryObjectExpr invalidates arguments.
+int tempobj2()
+{
+  int j;
+  X a = X( &j, 1 );
+
+  return j; // no-warning
+}