Merge to upstream r225300.

Change-Id: I2b23715db9ac129ff80aa78ad5824db0a4d6fbb3

test/std/numerics/complex.number/complex.member.ops/assignment_complex.pass.cpp

@@ -0,0 +1,48 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <complex>
+
+// complex& operator=(const complex&);
+// template<class X> complex& operator= (const complex<X>&);
+
+#include <complex>
+#include <cassert>
+
+template <class T, class X>
+void
+test()
+{
+    std::complex<T> c;
+    assert(c.real() == 0);
+    assert(c.imag() == 0);
+    std::complex<T> c2(1.5, 2.5);
+    c = c2;
+    assert(c.real() == 1.5);
+    assert(c.imag() == 2.5);
+    std::complex<X> c3(3.5, -4.5);
+    c = c3;
+    assert(c.real() == 3.5);
+    assert(c.imag() == -4.5);
+}
+
+int main()
+{
+    test<float, float>();
+    test<float, double>();
+    test<float, long double>();
+
+    test<double, float>();
+    test<double, double>();
+    test<double, long double>();
+
+    test<long double, float>();
+    test<long double, double>();
+    test<long double, long double>();
+}