Merge to upstream r225300.

Change-Id: I2b23715db9ac129ff80aa78ad5824db0a4d6fbb3

test/std/language.support/support.runtime/ctime.pass.cpp

@@ -0,0 +1,40 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// test <ctime>
+
+#include <ctime>
+#include <type_traits>
+
+#ifndef NULL
+#error NULL not defined
+#endif
+
+#ifndef CLOCKS_PER_SEC
+#error CLOCKS_PER_SEC not defined
+#endif
+
+int main()
+{
+    std::clock_t c = 0;
+    std::size_t s = 0;
+    std::time_t t = 0;
+    std::tm tm = {0};
+    static_assert((std::is_same<decltype(std::clock()), std::clock_t>::value), "");
+    static_assert((std::is_same<decltype(std::difftime(t,t)), double>::value), "");
+    static_assert((std::is_same<decltype(std::mktime(&tm)), std::time_t>::value), "");
+    static_assert((std::is_same<decltype(std::time(&t)), std::time_t>::value), "");
+    static_assert((std::is_same<decltype(std::asctime(&tm)), char*>::value), "");
+    static_assert((std::is_same<decltype(std::ctime(&t)), char*>::value), "");
+    static_assert((std::is_same<decltype(std::gmtime(&t)), std::tm*>::value), "");
+    static_assert((std::is_same<decltype(std::localtime(&t)), std::tm*>::value), "");
+    char* c1 = 0;
+    const char* c2 = 0;
+    static_assert((std::is_same<decltype(std::strftime(c1,s,c2,&tm)), std::size_t>::value), "");
+}