Check in LLVM r95781.
diff --git a/test/CodeGenCXX/copy-assign-synthesis.cpp b/test/CodeGenCXX/copy-assign-synthesis.cpp
new file mode 100644
index 0000000..e9fc0c3
--- /dev/null
+++ b/test/CodeGenCXX/copy-assign-synthesis.cpp
@@ -0,0 +1,79 @@
+// RUN: %clang_cc1 -emit-llvm -o %t %s
+// RUN: grep "_ZN1XaSERK1X" %t | count 0
+
+extern "C" int printf(...);
+
+struct B {
+ B() : B1(3.14), B2(3.15), auB2(3.16) {}
+ float B1;
+ float B2;
+ void pr() {
+ printf("B1 = %f B2 = %f auB1 = %f\n", B1, B2, auB1);
+ }
+
+ union {
+ float auB1;
+ float auB2;
+ };
+};
+
+struct M {
+ M() : M1(10), M2(11) , auM1(12) {}
+ int M1;
+ int M2;
+ void pr() {
+ printf("M1 = %d M2 = %d auM1 = %d auM2 = %d\n", M1, M2, auM1, auM2);
+ }
+ union {
+ int auM1;
+ int auM2;
+ };
+};
+
+struct N : B {
+ N() : N1(20), N2(21) {}
+ int N1;
+ int N2;
+ void pr() {
+ printf("N1 = %d N2 = %d\n", N1, N2);
+ B::pr();
+ }
+};
+
+struct Q {
+ Q() : Q1(30), Q2(31) {}
+ int Q1;
+ int Q2;
+ void pr() {
+ printf("Q1 = %d Q2 = %d\n", Q1, Q2);
+ }
+};
+
+
+struct X : M , N {
+ X() : d(0.0), d1(1.1), d2(1.2), d3(1.3) {}
+ double d;
+ double d1;
+ double d2;
+ double d3;
+ void pr() {
+ printf("d = %f d1 = %f d2 = %f d3 = %f\n", d, d1,d2,d3);
+ M::pr(); N::pr();
+ q1.pr(); q2.pr();
+ }
+
+ Q q1, q2;
+};
+
+
+X srcX;
+X dstX;
+X dstY;
+
+int main() {
+ dstY = dstX = srcX;
+ srcX.pr();
+ dstX.pr();
+ dstY.pr();
+}
+