diff options
| author |  Abseil Team <absl-team@google.com> | 2018-07-25 09:37:23 -0700 |
|---|---|---|
| committer |  Matt Calabrese <calabrese@x.team> | 2018-07-25 14:13:24 -0400 |
| commit | c2e00d341913bf03b4597ade5b056042e23e8c58 (patch) | |
| tree | afe60b3c7db3ca3769f74ee94cef26c116be4645 | |
| parent | 9e060686d1c325f34f9806b45fe77bafeed00aee (diff) | |
Export of internal Abseil changes.
--
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
| -rw-r--r-- | absl/memory/memory.h | 6 | ||||
| -rw-r--r-- | absl/strings/internal/str_format/float_conversion.cc | 9 |
2 files changed, 13 insertions, 2 deletions
diff --git a/absl/memory/memory.h b/absl/memory/memory.h index c43e1566..f207169a 100644 --- a/absl/memory/memory.h +++ b/absl/memory/memory.h @@ -83,7 +83,11 @@ struct MakeUniqueResult<T[N]> { } // 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; #else // ----------------------------------------------------------------------------- diff --git a/absl/strings/internal/str_format/float_conversion.cc b/absl/strings/internal/str_format/float_conversion.cc index 37952b46..6176db9c 100644 --- a/absl/strings/internal/str_format/float_conversion.cc +++ b/absl/strings/internal/str_format/float_conversion.cc @@ -153,7 +153,14 @@ void PrintExponent(int exp, char e, Buffer *out) { template <typename Float, typename Int> 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> |