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Export of internal Abseil changes.

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eb6cc81ef7e89e10fc9df47418af93e22fd116d2 by Abseil Team <absl-team@google.com>:

Workaround clang bug https://bugs.llvm.org/show_bug.cgi?id=38289

PiperOrigin-RevId: 206006290

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509e9829295bfc429b82de42f2e073c756ea5709 by Jon Cohen <cohenjon@google.com>:

Remove make_unique ambiguity when using gcc 4.9 in C++14 mode.

gcc 4.9.4 has __cplusplus at 201300L instead of 201402L when in C++14 mode, I guess indicating incomplete support.  Anyways, it causes a problem with this check as in c++14 mode in old gcc we were defining absl::make_unique when std::make_unique was present

PiperOrigin-RevId: 205886589
GitOrigin-RevId: eb6cc81ef7e89e10fc9df47418af93e22fd116d2
Change-Id: I9acf3f3d0fd3b0b46ae099821f3bf21b72c28b2b
This commit is contained in:
Abseil Team 2018-07-25 09:37:23 -07:00 committed by Matt Calabrese
parent 9e060686d1
commit c2e00d3419
2 changed files with 13 additions and 2 deletions
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6
absl/memory/memory.h
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@ -83,7 +83,11 @@ struct MakeUniqueResult<T[N]> {
} // namespace memory_internal } // namespace memory_internal
#if __cplusplus >= 201402L || defined(_MSC_VER) // gcc 4.8 has __cplusplus at 201301 but doesn't define make_unique. Other
// supported compilers either just define __cplusplus as 201103 but have
// make_unique (msvc), or have make_unique whenever __cplusplus > 201103 (clang)
#if (__cplusplus > 201103L || defined(_MSC_VER)) && \
!(defined(__GNUC__) && __GNUC__ == 4 && __GNUC_MINOR__ == 8)
using std::make_unique; using std::make_unique;
#else #else
// ----------------------------------------------------------------------------- // -----------------------------------------------------------------------------

9
absl/strings/internal/str_format/float_conversion.cc
View file

@ -153,7 +153,14 @@ void PrintExponent(int exp, char e, Buffer *out) {
template <typename Float, typename Int> template <typename Float, typename Int>
constexpr bool CanFitMantissa() { constexpr bool CanFitMantissa() {
return std::numeric_limits<Float>::digits <= std::numeric_limits<Int>::digits; return
#if defined(__clang__) && !defined(__SSE3__)
// Workaround for clang bug: https://bugs.llvm.org/show_bug.cgi?id=38289
// Casting from long double to uint64_t is miscompiled and drops bits.
(!std::is_same<Float, long double>::value ||
!std::is_same<Int, uint64_t>::value) &&
#endif
std::numeric_limits<Float>::digits <= std::numeric_limits<Int>::digits;
} }
template <typename Float> template <typename Float>