After a long break to wait for the atomic spec to settle, this completes the library part of <atomic>. It currently won't even parse as it depends on the existence of the intrinsics specified at http://libcxx.llvm.org/atomic_design_a.html. Everything has been tested using fake intrinsics which have now been removed. As the intrinsics come online, the ATOMIC_* macros will need to be adjusted to reflect which operations are lock-free. These macros will probably need to be #ifdef'd for each supported platform.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@121267 91177308-0d34-0410-b5e6-96231b3b80d8

include/atomic

@@ -528,142 +528,6 @@ void atomic_signal_fence(memory_order m);
 
 #pragma GCC system_header
 
-//// Begin Temporary Intrinsics ////
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-bool
-__atomic_is_lock_free(_Tp)
-{
-    return false;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp
-__atomic_load(const volatile _Tp* __t, int)
-{
-    return *__t;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-void
-__atomic_store(volatile _Tp* __t, _Tp __d, int)
-{
-    *__t = __d;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp
-__atomic_exchange(volatile _Tp* __t, _Tp __d, int)
-{
-    _Tp __tmp = *__t;
-    *__t = __d;
-    return __tmp;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-bool
-__atomic_compare_exchange_strong(volatile _Tp* __o, _Tp* __e, _Tp __d, int, int)
-{
-    if (const_cast<_Tp&>(*__o) == *__e)
-    {
-        *__o = __d;
-        return true;
-    }
-    *__e = __d;
-    return false;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-bool
-__atomic_compare_exchange_weak(volatile _Tp* __o, _Tp* __e, _Tp __d, int, int)
-{
-    if (const_cast<_Tp&>(*__o) == *__e)
-    {
-        *__o = __d;
-        return true;
-    }
-    *__e = __d;
-    return false;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp
-__atomic_fetch_add(volatile _Tp* __o, _Tp __op, int)
-{
-    _Tp __tmp = *__o;
-    *__o += __op;
-    return __tmp;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp*
-__atomic_fetch_add(_Tp* volatile* __o, ptrdiff_t __op, int)
-{
-    _Tp* __tmp = *__o;
-    *__o += __op;
-    return __tmp;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp
-__atomic_fetch_sub(volatile _Tp* __o, _Tp __op, int)
-{
-    _Tp __tmp = *__o;
-    *__o -= __op;
-    return __tmp;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp*
-__atomic_fetch_sub(_Tp* volatile* __o, ptrdiff_t __op, int)
-{
-    _Tp* __tmp = *__o;
-    *__o -= __op;
-    return __tmp;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp
-__atomic_fetch_and(volatile _Tp* __o, _Tp __op, int)
-{
-    _Tp __tmp = *__o;
-    *__o &= __op;
-    return __tmp;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp
-__atomic_fetch_or(volatile _Tp* __o, _Tp __op, int)
-{
-    _Tp __tmp = *__o;
-    *__o |= __op;
-    return __tmp;
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp
-__atomic_fetch_xor(volatile _Tp* __o, _Tp __op, int)
-{
-    _Tp __tmp = *__o;
-    *__o ^= __op;
-    return __tmp;
-}
-
-//// End Temporary Intrinsics ////
-
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 typedef enum memory_order
@@ -752,9 +616,16 @@ struct __atomic_base  // false
     __atomic_base() {} // = default;
     _LIBCPP_INLINE_VISIBILITY
     /*constexpr*/ __atomic_base(_Tp __d) : __a_(__d) {}
+#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
     __atomic_base(const __atomic_base&) = delete;
     __atomic_base& operator=(const __atomic_base&) = delete;
     __atomic_base& operator=(const __atomic_base&) volatile = delete;
+#else  // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
+private:
+    __atomic_base(const __atomic_base&);
+    __atomic_base& operator=(const __atomic_base&);
+    __atomic_base& operator=(const __atomic_base&) volatile;
+#endif  // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
 };
 
 // atomic<Integral>
@@ -1467,180 +1338,170 @@ atomic_fetch_xor_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m)
     return __o->fetch_xor(__op, __m);
 }
 
-// Atomics for standard typedef types
-
-typedef atomic<char>               atomic_char;
-typedef atomic<signed char>        atomic_schar;
-typedef atomic<unsigned char>      atomic_uchar;
-typedef atomic<short>              atomic_short;
-typedef atomic<unsigned short>     atomic_ushort;
-typedef atomic<int>                atomic_int;
-typedef atomic<unsigned int>       atomic_uint;
-typedef atomic<long>               atomic_long;
-typedef atomic<unsigned long>      atomic_ulong;
-typedef atomic<long long>          atomic_llong;
-typedef atomic<unsigned long long> atomic_ullong;
-typedef atomic<char16_t>           atomic_char16_t;
-typedef atomic<char32_t>           atomic_char32_t;
-typedef atomic<wchar_t>            atomic_wchar_t;
-
-typedef atomic<int_least8_t>   atomic_int_least8_t;
-typedef atomic<uint_least8_t>  atomic_uint_least8_t;
-typedef atomic<int_least16_t>  atomic_int_least16_t;
-typedef atomic<uint_least16_t> atomic_uint_least16_t;
-typedef atomic<int_least32_t>  atomic_int_least32_t;
-typedef atomic<uint_least32_t> atomic_uint_least32_t;
-typedef atomic<int_least64_t>  atomic_int_least64_t;
-typedef atomic<uint_least64_t> atomic_uint_least64_t;
-
-typedef atomic<int_fast8_t>   atomic_int_fast8_t;
-typedef atomic<uint_fast8_t>  atomic_uint_fast8_t;
-typedef atomic<int_fast16_t>  atomic_int_fast16_t;
-typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
-typedef atomic<int_fast32_t>  atomic_int_fast32_t;
-typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
-typedef atomic<int_fast64_t>  atomic_int_fast64_t;
-typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
-
-typedef atomic<intptr_t>  atomic_intptr_t;
-typedef atomic<uintptr_t> atomic_uintptr_t;
-typedef atomic<size_t>    atomic_size_t;
-typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
-typedef atomic<intmax_t>  atomic_intmax_t;
-typedef atomic<uintmax_t> atomic_uintmax_t;
-
-/*
 // flag type and operations
 
-typedef bool __atomic_flag__;
-
-struct atomic_flag;
-
-bool atomic_flag_test_and_set(volatile atomic_flag*);
-bool atomic_flag_test_and_set(atomic_flag*);
-bool atomic_flag_test_and_set_explicit(volatile atomic_flag*, memory_order);
-bool atomic_flag_test_and_set_explicit(atomic_flag*, memory_order);
-void atomic_flag_clear(volatile atomic_flag*);
-void atomic_flag_clear(atomic_flag*);
-void atomic_flag_clear_explicit(volatile atomic_flag*, memory_order);
-void atomic_flag_clear_explicit(atomic_flag*, memory_order);
-
-typedef struct _LIBCPP_VISIBLE atomic_flag
+typedef struct atomic_flag
 {
-    __atomic_flag__ __flg_;
+    bool __a_;
 
     _LIBCPP_INLINE_VISIBILITY
-    bool test_and_set(memory_order __o = memory_order_seq_cst) volatile
-        {return atomic_flag_test_and_set_explicit(this, __o);}
+    bool test_and_set(memory_order __m = memory_order_seq_cst) volatile
+        {return __atomic_exchange(&__a_, true, __m);}
     _LIBCPP_INLINE_VISIBILITY
-    bool test_and_set(memory_order __o = memory_order_seq_cst)
-        {return atomic_flag_test_and_set_explicit(this, __o);}
-
+    bool test_and_set(memory_order __m = memory_order_seq_cst)
+        {return __atomic_exchange(&__a_, true, __m);}
     _LIBCPP_INLINE_VISIBILITY
-    void clear(memory_order __o = memory_order_seq_cst) volatile
-        {atomic_flag_clear_explicit(this, __o);}
+    void clear(memory_order __m = memory_order_seq_cst) volatile
+        {__atomic_store(&__a_, false, __m);}
     _LIBCPP_INLINE_VISIBILITY
-    void clear(memory_order __o = memory_order_seq_cst)
-        {atomic_flag_clear_explicit(this, __o);}
+    void clear(memory_order __m = memory_order_seq_cst)
+        {__atomic_store(&__a_, false, __m);}
 
-#ifndef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
-    atomic_flag() = default;
-#else
     _LIBCPP_INLINE_VISIBILITY
-    atomic_flag() {};
-#endif
+    atomic_flag() {} // = default;
+    _LIBCPP_INLINE_VISIBILITY
+    atomic_flag(bool __b) : __a_(__b) {}
 
 #ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
     atomic_flag(const atomic_flag&) = delete;
     atomic_flag& operator=(const atomic_flag&) = delete;
     atomic_flag& operator=(const atomic_flag&) volatile = delete;
-#else
+#else  // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
 private:
     atomic_flag(const atomic_flag&);
     atomic_flag& operator=(const atomic_flag&);
     atomic_flag& operator=(const atomic_flag&) volatile;
-public:
-#endif
+#endif  // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
 } atomic_flag;
 
 inline _LIBCPP_INLINE_VISIBILITY
 bool
-atomic_flag_test_and_set(volatile atomic_flag* __f)
+atomic_flag_test_and_set(volatile atomic_flag* __o)
 {
-    return __atomic_exchange(&__f->__flg_, __atomic_flag__(true),
-                             memory_order_seq_cst)
-            == __atomic_flag__(true);
+    return __o->test_and_set();
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
 bool
-atomic_flag_test_and_set(atomic_flag* __f)
+atomic_flag_test_and_set(atomic_flag* __o)
 {
-    return atomic_flag_test_and_set(const_cast<volatile atomic_flag*>(__f));
+    return __o->test_and_set();
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
 bool
-atomic_flag_test_and_set_explicit(volatile atomic_flag* __f, memory_order __o)
+atomic_flag_test_and_set_explicit(volatile atomic_flag* __o, memory_order __m)
 {
-    return __atomic_exchange(&__f->__flg_, __atomic_flag__(true), __o)
-            == __atomic_flag__(true);
+    return __o->test_and_set(__m);
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
 bool
-atomic_flag_test_and_set_explicit(atomic_flag* __f, memory_order __o)
+atomic_flag_test_and_set_explicit(atomic_flag* __o, memory_order __m)
 {
-    return atomic_flag_test_and_set_explicit(const_cast<volatile atomic_flag*>
-                                                                    (__f), __o);
+    return __o->test_and_set(__m);
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
 void
-atomic_flag_clear(volatile atomic_flag* __f)
+atomic_flag_clear(volatile atomic_flag* __o)
 {
-    __atomic_store(&__f->__flg_, __atomic_flag__(false), memory_order_seq_cst);
+    __o->clear();
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
 void
-atomic_flag_clear(atomic_flag* __f)
+atomic_flag_clear(atomic_flag* __o)
 {
-    atomic_flag_clear(const_cast<volatile atomic_flag*>(__f));
+    __o->clear();
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
 void
-atomic_flag_clear_explicit(volatile atomic_flag* __f, memory_order __o)
+atomic_flag_clear_explicit(volatile atomic_flag* __o, memory_order __m)
 {
-    __atomic_store(&__f->__flg_, __atomic_flag__(false), __o);
+    __o->clear(__m);
 }
 
 inline _LIBCPP_INLINE_VISIBILITY
 void
-atomic_flag_clear_explicit(atomic_flag* __f, memory_order __o)
+atomic_flag_clear_explicit(atomic_flag* __o, memory_order __m)
 {
-    atomic_flag_clear_explicit(const_cast<volatile atomic_flag*>(__f), __o);
+    __o->clear(__m);
 }
 
-#define ATOMIC_FLAG_INIT {false}
-#define ATOMIC_VAR_INIT(__v) {__v}
+// fences
 
 inline _LIBCPP_INLINE_VISIBILITY
-memory_order
-__translate_memory_order(memory_order __o)
-{
-    switch (__o)
-    {
-    case memory_order_acq_rel:
-        return memory_order_acquire;
-    case memory_order_release:
-        return memory_order_relaxed;
-    }
-    return __o;
+void
+atomic_thread_fence(memory_order __m)
+{
+    __atomic_thread_fence(__m);
 }
 
-*/
+inline _LIBCPP_INLINE_VISIBILITY
+void
+atomic_signal_fence(memory_order __m)
+{
+    __atomic_signal_fence(__m);
+}
+
+// Atomics for standard typedef types
+
+typedef atomic<char>               atomic_char;
+typedef atomic<signed char>        atomic_schar;
+typedef atomic<unsigned char>      atomic_uchar;
+typedef atomic<short>              atomic_short;
+typedef atomic<unsigned short>     atomic_ushort;
+typedef atomic<int>                atomic_int;
+typedef atomic<unsigned int>       atomic_uint;
+typedef atomic<long>               atomic_long;
+typedef atomic<unsigned long>      atomic_ulong;
+typedef atomic<long long>          atomic_llong;
+typedef atomic<unsigned long long> atomic_ullong;
+typedef atomic<char16_t>           atomic_char16_t;
+typedef atomic<char32_t>           atomic_char32_t;
+typedef atomic<wchar_t>            atomic_wchar_t;
+
+typedef atomic<int_least8_t>   atomic_int_least8_t;
+typedef atomic<uint_least8_t>  atomic_uint_least8_t;
+typedef atomic<int_least16_t>  atomic_int_least16_t;
+typedef atomic<uint_least16_t> atomic_uint_least16_t;
+typedef atomic<int_least32_t>  atomic_int_least32_t;
+typedef atomic<uint_least32_t> atomic_uint_least32_t;
+typedef atomic<int_least64_t>  atomic_int_least64_t;
+typedef atomic<uint_least64_t> atomic_uint_least64_t;
+
+typedef atomic<int_fast8_t>   atomic_int_fast8_t;
+typedef atomic<uint_fast8_t>  atomic_uint_fast8_t;
+typedef atomic<int_fast16_t>  atomic_int_fast16_t;
+typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
+typedef atomic<int_fast32_t>  atomic_int_fast32_t;
+typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
+typedef atomic<int_fast64_t>  atomic_int_fast64_t;
+typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
+
+typedef atomic<intptr_t>  atomic_intptr_t;
+typedef atomic<uintptr_t> atomic_uintptr_t;
+typedef atomic<size_t>    atomic_size_t;
+typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
+typedef atomic<intmax_t>  atomic_intmax_t;
+typedef atomic<uintmax_t> atomic_uintmax_t;
+
+#define ATOMIC_FLAG_INIT {false}
+#define ATOMIC_VAR_INIT(__v) {__v}
+
+// lock-free property
+
+#define ATOMIC_CHAR_LOCK_FREE 0
+#define ATOMIC_CHAR16_T_LOCK_FREE 0
+#define ATOMIC_CHAR32_T_LOCK_FREE 0
+#define ATOMIC_WCHAR_T_LOCK_FREE 0
+#define ATOMIC_SHORT_LOCK_FREE 0
+#define ATOMIC_INT_LOCK_FREE 0
+#define ATOMIC_LONG_LOCK_FREE 0
+#define ATOMIC_LLONG_LOCK_FREE 0
+
 _LIBCPP_END_NAMESPACE_STD
 
 #endif  // _LIBCPP_ATOMIC

test/atomics/atomics.fences/atomic_signal_fence.pass.cpp

@@ -0,0 +1,19 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <atomic>
+
+// void atomic_signal_fence(memory_order m);
+
+#include <atomic>
+
+int main()
+{
+    std::atomic_signal_fence(std::memory_order_seq_cst);
+}

test/atomics/atomics.fences/atomic_thread_fence.pass.cpp

@@ -0,0 +1,19 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <atomic>
+
+// void atomic_thread_fence(memory_order m);
+
+#include <atomic>
+
+int main()
+{
+    std::atomic_thread_fence(std::memory_order_seq_cst);
+}

test/atomics/atomics.lockfree/lockfree.pass.cpp

@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <atomic>
+
+// #define ATOMIC_CHAR_LOCK_FREE unspecified
+// #define ATOMIC_CHAR16_T_LOCK_FREE unspecified
+// #define ATOMIC_CHAR32_T_LOCK_FREE unspecified
+// #define ATOMIC_WCHAR_T_LOCK_FREE unspecified
+// #define ATOMIC_SHORT_LOCK_FREE unspecified
+// #define ATOMIC_INT_LOCK_FREE unspecified
+// #define ATOMIC_LONG_LOCK_FREE unspecified
+// #define ATOMIC_LLONG_LOCK_FREE unspecified
+
+#include <atomic>
+#include <cassert>
+
+int main()
+{
+    assert(ATOMIC_CHAR_LOCK_FREE == 0 ||
+           ATOMIC_CHAR_LOCK_FREE == 1 ||
+           ATOMIC_CHAR_LOCK_FREE == 2);
+    assert(ATOMIC_CHAR16_T_LOCK_FREE == 0 ||
+           ATOMIC_CHAR16_T_LOCK_FREE == 1 ||
+           ATOMIC_CHAR16_T_LOCK_FREE == 2);
+    assert(ATOMIC_CHAR32_T_LOCK_FREE == 0 ||
+           ATOMIC_CHAR32_T_LOCK_FREE == 1 ||
+           ATOMIC_CHAR32_T_LOCK_FREE == 2);
+    assert(ATOMIC_WCHAR_T_LOCK_FREE == 0 ||
+           ATOMIC_WCHAR_T_LOCK_FREE == 1 ||
+           ATOMIC_WCHAR_T_LOCK_FREE == 2);
+    assert(ATOMIC_SHORT_LOCK_FREE == 0 ||
+           ATOMIC_SHORT_LOCK_FREE == 1 ||
+           ATOMIC_SHORT_LOCK_FREE == 2);
+    assert(ATOMIC_INT_LOCK_FREE == 0 ||
+           ATOMIC_INT_LOCK_FREE == 1 ||
+           ATOMIC_INT_LOCK_FREE == 2);
+    assert(ATOMIC_LONG_LOCK_FREE == 0 ||
+           ATOMIC_LONG_LOCK_FREE == 1 ||
+           ATOMIC_LONG_LOCK_FREE == 2);
+    assert(ATOMIC_LLONG_LOCK_FREE == 0 ||
+           ATOMIC_LLONG_LOCK_FREE == 1 ||
+           ATOMIC_LLONG_LOCK_FREE == 2);
+}

test/atomics/atomics.types.generic/cstdint_typedefs.pass.cpp

@@ -0,0 +1,66 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <atomic>
+
+// typedef atomic<int_least8_t>   atomic_int_least8_t;
+// typedef atomic<uint_least8_t>  atomic_uint_least8_t;
+// typedef atomic<int_least16_t>  atomic_int_least16_t;
+// typedef atomic<uint_least16_t> atomic_uint_least16_t;
+// typedef atomic<int_least32_t>  atomic_int_least32_t;
+// typedef atomic<uint_least32_t> atomic_uint_least32_t;
+// typedef atomic<int_least64_t>  atomic_int_least64_t;
+// typedef atomic<uint_least64_t> atomic_uint_least64_t;
+// 
+// typedef atomic<int_fast8_t>   atomic_int_fast8_t;
+// typedef atomic<uint_fast8_t>  atomic_uint_fast8_t;
+// typedef atomic<int_fast16_t>  atomic_int_fast16_t;
+// typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
+// typedef atomic<int_fast32_t>  atomic_int_fast32_t;
+// typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
+// typedef atomic<int_fast64_t>  atomic_int_fast64_t;
+// typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
+// 
+// typedef atomic<intptr_t>  atomic_intptr_t;
+// typedef atomic<uintptr_t> atomic_uintptr_t;
+// typedef atomic<size_t>    atomic_size_t;
+// typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
+// typedef atomic<intmax_t>  atomic_intmax_t;
+// typedef atomic<uintmax_t> atomic_uintmax_t;
+
+#include <atomic>
+#include <type_traits>
+
+int main()
+{
+    static_assert((std::is_same<std::atomic<  std::int_least8_t>,   std::atomic_int_least8_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::uint_least8_t>,  std::atomic_uint_least8_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::int_least16_t>,  std::atomic_int_least16_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::uint_least16_t>, std::atomic_uint_least16_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::int_least32_t>,  std::atomic_int_least32_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::uint_least32_t>, std::atomic_uint_least32_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::int_least64_t>,  std::atomic_int_least64_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::uint_least64_t>, std::atomic_uint_least64_t>::value), "");
+
+    static_assert((std::is_same<std::atomic<  std::int_fast8_t>,   std::atomic_int_fast8_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::uint_fast8_t>,  std::atomic_uint_fast8_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::int_fast16_t>,  std::atomic_int_fast16_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::uint_fast16_t>, std::atomic_uint_fast16_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::int_fast32_t>,  std::atomic_int_fast32_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::uint_fast32_t>, std::atomic_uint_fast32_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::int_fast64_t>,  std::atomic_int_fast64_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::uint_fast64_t>, std::atomic_uint_fast64_t>::value), "");
+
+    static_assert((std::is_same<std::atomic< std::intptr_t>,  std::atomic_intptr_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::uintptr_t>, std::atomic_uintptr_t>::value), "");
+    static_assert((std::is_same<std::atomic<   std::size_t>,    std::atomic_size_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::ptrdiff_t>, std::atomic_ptrdiff_t>::value), "");
+    static_assert((std::is_same<std::atomic< std::intmax_t>,  std::atomic_intmax_t>::value), "");
+    static_assert((std::is_same<std::atomic<std::uintmax_t>, std::atomic_uintmax_t>::value), "");
+}

test/atomics/atomics.types.generic/integral_typedefs.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.
+//
+//===----------------------------------------------------------------------===//
+
+// <atomic>
+
+// typedef atomic<char>               atomic_char;
+// typedef atomic<signed char>        atomic_schar;
+// typedef atomic<unsigned char>      atomic_uchar;
+// typedef atomic<short>              atomic_short;
+// typedef atomic<unsigned short>     atomic_ushort;
+// typedef atomic<int>                atomic_int;
+// typedef atomic<unsigned int>       atomic_uint;
+// typedef atomic<long>               atomic_long;
+// typedef atomic<unsigned long>      atomic_ulong;
+// typedef atomic<long long>          atomic_llong;
+// typedef atomic<unsigned long long> atomic_ullong;
+// typedef atomic<char16_t>           atomic_char16_t;
+// typedef atomic<char32_t>           atomic_char32_t;
+// typedef atomic<wchar_t>            atomic_wchar_t;
+
+#include <atomic>
+#include <type_traits>
+
+int main()
+{
+    static_assert((std::is_same<std::atomic<char>, std::atomic_char>::value), "");
+    static_assert((std::is_same<std::atomic<signed char>, std::atomic_schar>::value), "");
+    static_assert((std::is_same<std::atomic<unsigned char>, std::atomic_uchar>::value), "");
+    static_assert((std::is_same<std::atomic<short>, std::atomic_short>::value), "");
+    static_assert((std::is_same<std::atomic<unsigned short>, std::atomic_ushort>::value), "");
+    static_assert((std::is_same<std::atomic<int>, std::atomic_int>::value), "");
+    static_assert((std::is_same<std::atomic<unsigned int>, std::atomic_uint>::value), "");
+    static_assert((std::is_same<std::atomic<long>, std::atomic_long>::value), "");
+    static_assert((std::is_same<std::atomic<unsigned long>, std::atomic_ulong>::value), "");
+    static_assert((std::is_same<std::atomic<long long>, std::atomic_llong>::value), "");
+    static_assert((std::is_same<std::atomic<unsigned long long>, std::atomic_ullong>::value), "");
+    static_assert((std::is_same<std::atomic<wchar_t>, std::atomic_wchar_t>::value), "");
+#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
+    static_assert((std::is_same<std::atomic<char16_t>, std::atomic_char16_t>::value), "");
+    static_assert((std::is_same<std::atomic<char32_t>, std::atomic_char32_t>::value), "");
+#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
+}

test/atomics/atomics.types.operations/atomics.types.operations.arith/nothing_to_do.pass.cpp

@@ -0,0 +1,13 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+int main()
+{
+}

test/atomics/atomics.types.operations/atomics.types.operations.general/nothing_to_do.pass.cpp

@@ -0,0 +1,13 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+int main()
+{
+}

test/atomics/atomics.types.operations/atomics.types.operations.pointer/nothing_to_do.pass.cpp

@@ -0,0 +1,13 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+int main()
+{
+}

test/atomics/atomics.types.operations/atomics.types.operations.req/atomic_var_init.pass.cpp

@@ -0,0 +1,21 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <atomic>
+
+// #define ATOMIC_VAR_INIT(value)
+
+#include <atomic>
+#include <cassert>
+
+int main()
+{
+    std::atomic<int> v = ATOMIC_VAR_INIT(5);
+    assert(v == 5);
+}

test/atomics/atomics.types.operations/atomics.types.operations.templ/nothing_to_do.pass.cpp

@@ -0,0 +1,13 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+int main()
+{
+}

test/atomics/atomics.types.operations/nothing_to_do.pass.cpp

@@ -0,0 +1,13 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+int main()
+{
+}