1 files changed, 85 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/derived-to-base-conv.cpp b/clang/test/CodeGenCXX/derived-to-base-conv.cpp
new file mode 100644
index 0000000..8c51809
--- /dev/null
+++ b/clang/test/CodeGenCXX/derived-to-base-conv.cpp
@@ -0,0 +1,85 @@
+// REQUIRES: x86-registered-target,x86-64-registered-target
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -S %s -o %t-64.s
+// RUN: FileCheck -check-prefix LP64 --input-file=%t-64.s %s
+// RUN: %clang_cc1 -triple i386-apple-darwin -std=c++11 -S %s -o %t-32.s
+// RUN: FileCheck -check-prefix LP32 --input-file=%t-32.s %s
+
+extern "C" int printf(...);
+extern "C" void exit(int);
+
+struct A {
+  A (const A&) { printf("A::A(const A&)\n"); }
+  A() {};
+  ~A() { printf("A::~A()\n"); }
+}; 
+
+struct B : public A {
+  B() {};
+  B(const B& Other) : A(Other) { printf("B::B(const B&)\n"); }
+  ~B() { printf("B::~B()\n"); }
+};
+
+struct C : public B {
+  C() {};
+  C(const C& Other) : B(Other) { printf("C::C(const C&)\n"); }
+  ~C() { printf("C::~C()\n"); }
+}; 
+
+struct X {
+	operator B&() {printf("X::operator B&()\n"); return b; }
+	operator C&() {printf("X::operator C&()\n"); return c; }
+ 	X (const X&) { printf("X::X(const X&)\n"); }
+ 	X () { printf("X::X()\n"); }
+ 	~X () { printf("X::~X()\n"); }
+	B b;
+	C c;
+};
+
+void f(A) {
+  printf("f(A)\n");
+}
+
+
+void func(X x) 
+{
+  f (x);
+}
+
+int main()
+{
+    X x;
+    func(x);
+}
+
+struct Base;
+
+struct Root {
+  operator Base&() { exit(1); }
+};
+
+struct Derived;
+
+struct Base : Root {
+  Base(const Base&) { printf("Base::(const Base&)\n"); }
+  Base() { printf("Base::Base()\n"); }
+  operator Derived&() { exit(1); }
+};
+
+struct Derived : Base {
+};
+
+void foo(Base) {}
+
+void test(Derived bb)
+{
+	// CHECK-LP64-NOT: callq    __ZN4BasecvR7DerivedEv
+	// CHECK-LP32-NOT: callq    L__ZN4BasecvR7DerivedEv
+        foo(bb);
+}
+// CHECK-LP64: callq    __ZN1XcvR1BEv
+// CHECK-LP64: callq    __ZN1AC1ERKS_
+
+// CHECK-LP32: calll     L__ZN1XcvR1BEv
+// CHECK-LP32: calll     L__ZN1AC1ERKS_
+
+