Implement derived-to-base AST/code gen. There is a

FIXME in CGCXX.cpp that I would like Anders to
take a look at.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@84265 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 51 insertions, 0 deletions

diff --git a/test/CodeGenCXX/derived-to-base-conv.cpp b/test/CodeGenCXX/derived-to-base-conv.cpp
new file mode 100644
index 0000000000..218116e346
--- /dev/null
+++ b/test/CodeGenCXX/derived-to-base-conv.cpp
@@ -0,0 +1,51 @@
+// RUN: clang-cc -triple x86_64-apple-darwin -std=c++0x -S %s -o %t-64.s &&
+// RUN: FileCheck -check-prefix LP64 --input-file=%t-64.s %s &&
+// RUN: clang-cc -triple i386-apple-darwin -std=c++0x -S %s -o %t-32.s &&
+// RUN: FileCheck -check-prefix LP32 --input-file=%t-32.s %s &&
+// RUN: true
+
+extern "C" int printf(...);
+
+struct A {
+ A (const A&) { printf("A::A(const A&)\n"); }
+ A() {};
+}; 
+
+struct B : public A {
+  B() {};
+}; 
+
+struct C : public B {
+  C() {};
+}; 
+
+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"); }
+	B b;
+	C c;
+};
+
+void f(A) {
+  printf("f(A)\n");
+}
+
+
+void func(X x) 
+{
+  f (x);
+}
+
+int main()
+{
+    X x;
+    func(x);
+}
+
+// CHECK-LP64: call     __ZN1XcvR1BEv
+// CHECK-LP64: call     __ZN1AC1ERKS_
+
+// CHECK-LP32: call     L__ZN1XcvR1BEv
+// CHECK-LP32: call     L__ZN1AC1ERKS_