Vendor import of clang release_34 branch r197841 (effectively, 3.4 RC3):

https://llvm.org/svn/llvm-project/cfe/branches/release_34@197841

1 files changed, 25 insertions, 0 deletions

diff --git a/test/Analysis/derived-to-base.cpp b/test/Analysis/derived-to-base.cpp
index 0664189..e9c7ca8 100644
--- a/test/Analysis/derived-to-base.cpp
+++ b/test/Analysis/derived-to-base.cpp
@@ -450,3 +450,28 @@ namespace PR15394 {
   }
 };
 
+namespace Bug16309 {
+  struct Incomplete;
+
+  struct Base { virtual ~Base(); };
+
+  struct Derived : public Base { int x; };
+
+  void* f(Incomplete *i) {
+    Base *b = reinterpret_cast<Base *>(i);
+    // This used to crash because of the reinterpret_cast above.
+    Derived *d = dynamic_cast<Derived *>(b);
+    return d;
+  }
+
+  // And check that reinterpret+dynamic casts work correctly after the fix.
+  void g() {
+    Derived d;
+    d.x = 47;
+    Base *b = &d;
+    Incomplete *i = reinterpret_cast<Incomplete *>(b);
+    Base *b2 = reinterpret_cast<Base *>(i);
+    Derived *d2 = dynamic_cast<Derived *>(b2);
+    clang_analyzer_eval(d2->x == 47); // expected-warning{{TRUE}}
+  }
+}