Set the cast kind to CK_NoOp for C-style casts that are really const casts. Fixes PR5248.

llvm-svn: 84514
diff --git a/clang/test/CodeGenCXX/casts.cpp b/clang/test/CodeGenCXX/casts.cpp
new file mode 100644
index 0000000..045f2d4
--- /dev/null
+++ b/clang/test/CodeGenCXX/casts.cpp
@@ -0,0 +1,14 @@
+// RUN: clang-cc %s -emit-llvm -o %t
+
+// PR5248
+namespace PR5248 {
+struct A {
+  void copyFrom(const A &src);
+  void addRef(void);
+};
+
+void A::copyFrom(const A &src) {
+  ((A &)src).addRef();
+}
+}
+