The bitset(unsigned long long) constructor was broken by the constexpr additions only on 32 bit platforms. Fixed. This addresses http://llvm.org/bugs/show_bug.cgi?id=15444.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@176559 91177308-0d34-0410-b5e6-96231b3b80d8

include/bitset

@@ -249,7 +249,13 @@ inline _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_CONSTEXPR
 __bitset<_N_words, _Size>::__bitset(unsigned long long __v) _NOEXCEPT
 #ifndef _LIBCPP_HAS_NO_CONSTEXPR
+#if __SIZE_WIDTH__ == 64
     : __first_{__v}
+#elif __SIZE_WIDTH__ == 32
+    : __first_{__v, __v >> __bits_per_word}
+#elif
+#error This constructor has not been ported to this platform
+#endif
 #endif
 {
 #ifdef _LIBCPP_HAS_NO_CONSTEXPR
@@ -633,6 +639,7 @@ template <size_t _Size>
 class _LIBCPP_VISIBLE bitset
     : private __bitset<_Size == 0 ? 0 : (_Size - 1) / (sizeof(size_t) * CHAR_BIT) + 1, _Size>
 {
+public:
     static const unsigned __n_words = _Size == 0 ? 0 : (_Size - 1) / (sizeof(size_t) * CHAR_BIT) + 1;
     typedef __bitset<__n_words, _Size> base;