diff --git a/libcxx/include/__config b/libcxx/include/__config
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -963,6 +963,20 @@
 #  define _LIBCPP_DEPRECATED_IN_CXX17
 #endif
 
+// Macros to enter and leave a state where deprecation warnings are suppressed.
+#if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH) && \
+    (defined(_LIBCPP_COMPILER_CLANG) || defined(_LIBCPP_COMPILER_GCC))
+#  define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \
+    _Pragma("GCC diagnostic push") \
+    _Pragma("GCC diagnostic ignored \"-Wdeprecated\"")
+#  define _LIBCPP_SUPPRESS_DEPRECATED_POP \
+    _Pragma("GCC diagnostic pop")
+#endif
+#if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH)
+#  define _LIBCPP_SUPPRESS_DEPRECATED_PUSH
+#  define _LIBCPP_SUPPRESS_DEPRECATED_POP
+#endif
+
 #if _LIBCPP_STD_VER <= 11
 #  define _LIBCPP_EXPLICIT_AFTER_CXX11
 #else
diff --git a/libcxx/include/type_traits b/libcxx/include/type_traits
--- a/libcxx/include/type_traits
+++ b/libcxx/include/type_traits
@@ -1119,8 +1119,11 @@
 template <class _Tp> using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type;
 #endif
 
+// Suppress deprecation notice for volatile-qualified return type.
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <class _Tp> _Tp&& __declval(int);
 template <class _Tp> _Tp   __declval(long);
+_LIBCPP_SUPPRESS_DEPRECATED_POP
 
 template <class _Tp>
 decltype(_VSTD::__declval<_Tp>(0))
diff --git a/libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp b/libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp
--- a/libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/result_of11.pass.cpp
@@ -55,6 +55,9 @@
 #endif
 }
 
+// Do not warn on deprecated uses of 'volatile' below.
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
+
 int main(int, char**)
 {
     {
@@ -171,3 +174,5 @@
 
   return 0;
 }
+
+_LIBCPP_SUPPRESS_DEPRECATED_POP
diff --git a/libcxxabi/test/unwind_06.pass.cpp b/libcxxabi/test/unwind_06.pass.cpp
--- a/libcxxabi/test/unwind_06.pass.cpp
+++ b/libcxxabi/test/unwind_06.pass.cpp
@@ -24,7 +24,7 @@
 double try1(bool v) {
   double a = get(0);
   double b = get(1);
-  for (counter = 100; counter; --counter)
+  for (counter = 100; counter; counter = counter - 1)
     a += get(1) + b;
   if (v) throw 10;
   return get(0)+a+b;
@@ -34,7 +34,7 @@
   double a = get(0);
   double b = get(1);
   double c = get(2);
-  for (counter = 100; counter; --counter)
+  for (counter = 100; counter; counter = counter - 1)
     a += get(1) + b + c;
   if (v) throw 10;
   return get(0)+a+b+c;
@@ -45,7 +45,7 @@
   double b = get(1);
   double c = get(2);
   double d = get(3);
-  for (counter = 100; counter; --counter)
+  for (counter = 100; counter; counter = counter - 1)
     a += get(1) + b + c + d;
   if (v) throw 10;
   return get(0)+a+b+c+d;
@@ -57,7 +57,7 @@
   double c = get(0);
   double d = get(0);
   double e = get(0);
-  for (counter = 100; counter; --counter)
+  for (counter = 100; counter; counter = counter - 1)
     a += get(1) + b+c+d+e;
   if (v) throw 10;
   return get(0)+a+b+c+d+e;
@@ -70,7 +70,7 @@
   double d = get(0);
   double e = get(0);
   double f = get(0);
-  for (counter = 100; counter; --counter)
+  for (counter = 100; counter; counter = counter - 1)
     a += get(1) + b+c+d+e+f;
   if (v) throw 10;
   return get(0)+a+b+c+d+e+f;
@@ -84,7 +84,7 @@
   double e = get(0);
   double f = get(0);
   double g = get(0);
-  for (counter = 100; counter; --counter)
+  for (counter = 100; counter; counter = counter - 1)
     a += get(1) + b+c+d+e+f+g;
   if (v) throw 10;
   return get(0)+a+b+c+d+e+f+g;
@@ -99,7 +99,7 @@
   double f = get(0);
   double g = get(0);
   double h = get(0);
-  for (counter = 100; counter; --counter)
+  for (counter = 100; counter; counter = counter - 1)
     a += get(1) + b+c+d+e+f+g+h;
   if (v) throw 10;
   return get(0)+a+b+c+d+e+f+g+h;
@@ -115,7 +115,7 @@
   double g = get(0);
   double h = get(0);
   double i = get(0);
-  for (counter = 100; counter; --counter)
+  for (counter = 100; counter; counter = counter - 1)
     a += get(1) + b+c+d+e+f+g+h+i;
   if (v) throw 10;
   return get(0)+a+b+c+d+e+f+g+h+i;