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| author | Marshall Clow <mclow.lists@gmail.com> | 2017-01-26 06:58:29 +0000 |
|---|---|---|
| committer | Marshall Clow <mclow.lists@gmail.com> | 2017-01-26 06:58:29 +0000 |
| commit | 3a3c09c5ddd113033b8ea64692bc5ccb3ae72b9e (patch) | |
| tree | ba3f154bf5fa3b24b6aa6af21780af7be3902905 /libcxx/include/__string | |
| parent | 7046a852b381b5100ac2f319e493453a6d168278 (diff) | |
| download | bcm5719-llvm-3a3c09c5ddd113033b8ea64692bc5ccb3ae72b9e.tar.gz bcm5719-llvm-3a3c09c5ddd113033b8ea64692bc5ccb3ae72b9e.zip | |
Use the new __has_feature(cxx_constexpr_string_builtins) for detection of the C-string intrinsics for constexpr support in std::char_traits. Thanks to Richard for the intrisic support.
llvm-svn: 293154
Diffstat (limited to 'libcxx/include/__string')
| -rw-r--r-- | libcxx/include/__string | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/libcxx/include/__string b/libcxx/include/__string index c85b874f054..75608cea71d 100644 --- a/libcxx/include/__string +++ b/libcxx/include/__string @@ -243,7 +243,7 @@ char_traits<char>::compare(const char_type* __s1, const char_type* __s2, size_t { if (__n == 0) return 0; -#ifdef _LIBCPP_BUILTIN_MEMCMP_ISCONSTEXPR +#if __has_feature(cxx_constexpr_string_builtins) return __builtin_memcmp(__s1, __s2, __n); #elif _LIBCPP_STD_VER <= 14 return memcmp(__s1, __s2, __n); @@ -265,7 +265,9 @@ char_traits<char>::find(const char_type* __s, size_t __n, const char_type& __a) { if (__n == 0) return NULL; -#if _LIBCPP_STD_VER <= 14 +#if __has_feature(cxx_constexpr_string_builtins) + return __builtin_char_memchr(__s, to_int_type(__a), __n); +#elif _LIBCPP_STD_VER <= 14 return (const char_type*) memchr(__s, to_int_type(__a), __n); #else for (; __n; --__n) @@ -331,7 +333,7 @@ char_traits<wchar_t>::compare(const char_type* __s1, const char_type* __s2, size { if (__n == 0) return 0; -#if __has_builtin(__builtin_wmemcmp) +#if __has_feature(cxx_constexpr_string_builtins) return __builtin_wmemcmp(__s1, __s2, __n); #elif _LIBCPP_STD_VER <= 14 return wmemcmp(__s1, __s2, __n); @@ -351,7 +353,7 @@ inline _LIBCPP_CONSTEXPR_AFTER_CXX14 size_t char_traits<wchar_t>::length(const char_type* __s) _NOEXCEPT { -#if __has_builtin(__builtin_wcslen) +#if __has_feature(cxx_constexpr_string_builtins) return __builtin_wcslen(__s); #elif _LIBCPP_STD_VER <= 14 return wcslen(__s); @@ -369,7 +371,7 @@ char_traits<wchar_t>::find(const char_type* __s, size_t __n, const char_type& __ { if (__n == 0) return NULL; -#if __has_builtin(__builtin_wmemchr) +#if __has_feature(cxx_constexpr_string_builtins) return __builtin_wmemchr(__s, __a, __n); #elif _LIBCPP_STD_VER <= 14 return wmemchr(__s, __a, __n); |
