1 files changed, 26 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/microsoft-abi-byval-sret.cpp b/clang/test/CodeGenCXX/microsoft-abi-byval-sret.cpp
new file mode 100644
index 00000000000..00d36b7d492
--- /dev/null
+++ b/clang/test/CodeGenCXX/microsoft-abi-byval-sret.cpp
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i686-pc-win32 -mconstructor-aliases -fno-rtti | FileCheck %s
+
+struct A {
+  A() : a(42) {}
+  A(const A &o) : a(o.a) {}
+  ~A() {}
+  int a;
+  A foo(A o);
+};
+
+A A::foo(A x) {
+  A y(*this);
+  y.a += x.a;
+  return y;
+}
+
+// CHECK: define x86_thiscallcc void @"\01?foo@A@@QAE?AU1@U1@@Z"
+// CHECK:       (%struct.A* %this, <{ %struct.A*, %struct.A }>* inalloca)
+
+int main() {
+  A x;
+  A y = x.foo(x);
+}
+
+// CHECK: call x86_thiscallcc void @"\01?foo@A@@QAE?AU1@U1@@Z"
+// CHECK:       (%struct.A* %{{[^,]*}}, <{ %struct.A*, %struct.A }>* inalloca %{{[^,]*}})