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Fix new warnings emitted by GCC 7

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llvm-svn: 302280
This commit is contained in:
Eric Fiselier 2017-05-05 20:32:26 +00:00
parent 81273c721c
commit 807790a09b
3 changed files with 14 additions and 7 deletions
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7
libcxx/include/__config
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@ -1089,6 +1089,13 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
# define _LIBCPP_DIAGNOSE_ERROR(...) # define _LIBCPP_DIAGNOSE_ERROR(...)
#endif #endif
#if __has_attribute(fallthough) || defined(_LIBCPP_COMPILER_GCC)
// Use a function like macro to imply that it must be followed by a semicolon
#define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
#else
#define _LIBCPP_FALLTHROUGH() ((void)0)
#endif
#if defined(_LIBCPP_ABI_MICROSOFT) && \ #if defined(_LIBCPP_ABI_MICROSOFT) && \
(defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases))
# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) # define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)

2
libcxx/include/locale
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@ -2825,7 +2825,7 @@ money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
return false; return false;
} }
} }
// drop through _LIBCPP_FALLTHROUGH();
case money_base::none: case money_base::none:
if (__p != 3) if (__p != 3)
{ {

12
libcxx/src/locale.cpp
View File

@ -68,8 +68,8 @@ T&
make(A0 a0) make(A0 a0)
{ {
static typename aligned_storage<sizeof(T)>::type buf; static typename aligned_storage<sizeof(T)>::type buf;
::new (&buf) T(a0); auto *obj = ::new (&buf) T(a0);
return *reinterpret_cast<T*>(&buf); return *obj;
} }
template <class T, class A0, class A1> template <class T, class A0, class A1>
@ -88,8 +88,8 @@ T&
make(A0 a0, A1 a1, A2 a2) make(A0 a0, A1 a1, A2 a2)
{ {
static typename aligned_storage<sizeof(T)>::type buf; static typename aligned_storage<sizeof(T)>::type buf;
::new (&buf) T(a0, a1, a2); auto *obj = ::new (&buf) T(a0, a1, a2);
return *reinterpret_cast<T*>(&buf); return *obj;
} }
template <typename T, size_t N> template <typename T, size_t N>
@ -480,8 +480,8 @@ locale::__imp::make_global()
{ {
// only one thread can get in here and it only gets in once // only one thread can get in here and it only gets in once
static aligned_storage<sizeof(locale)>::type buf; static aligned_storage<sizeof(locale)>::type buf;
::new (&buf) locale(locale::classic()); auto *obj = ::new (&buf) locale(locale::classic());
return *reinterpret_cast<locale*>(&buf); return *obj;
} }
locale& locale&