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Special case some duration arithmetic for GCC and PPC because their long double constant folding is broken. Fixes PR#39696.

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llvm-svn: 357478
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Marshall Clow
2019-04-02 14:46:36 +00:00
parent 709ee69d0a
commit 3bf63cf3b3
1 changed files with 5 additions and 0 deletions
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5
libcxx/include/thread
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@@ -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)
{