Special case some duration arithmetic for GCC and PPC because their long double const...

llvm-svn: 357478

diff --git a/libcxx/include/thread b/libcxx/include/thread
index df06ff7..400459a 100644 (file)
--- a/libcxx/include/thread
+++ b/libcxx/include/thread
@@ -434,7 +434,12 @@ sleep_for(const chrono::duration<_Rep, _Period>& __d)
     using namespace chrono;
     if (__d > duration<_Rep, _Period>::zero())
     {
+#if defined(_LIBCPP_COMPILER_GCC) && (__powerpc__ || __POWERPC__)
+    //  GCC's long double const folding is incomplete for IBM128 long doubles.
+        _LIBCPP_CONSTEXPR duration<long double> _Max = duration<long double>(ULLONG_MAX/1000000000ULL) ;
+#else
         _LIBCPP_CONSTEXPR duration<long double> _Max = nanoseconds::max();
+#endif
         nanoseconds __ns;
         if (__d < _Max)
         {