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Disable -Wstrict-aliasing as GCC-7 incorrectly flags it in release mode (aligned storage holds the type we want).

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Ion Gaztañaga
2022-08-01 11:29:48 +02:00
parent 66d044cf66
commit 725d95b314
1 changed files with 10 additions and 8 deletions
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18
include/boost/container/small_vector.hpp
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@@ -449,19 +449,21 @@ BOOST_CONTAINER_FORCEINLINE typename small_vector_allocator<T, VoidAlloc, Option
typedef small_vector_storage_strawman<T, allocator_type, Options> strawman_t; typedef small_vector_storage_strawman<T, allocator_type, Options> strawman_t;
typedef typename strawman_t::sm_storage_t sm_storage_t; typedef typename strawman_t::sm_storage_t sm_storage_t;
//These warnings are false positives, as we know the alignment is correct
//and aligned storage is allowed to hold any type
#if defined(BOOST_GCC) && (BOOST_GCC >= 40600) #if defined(BOOST_GCC) && (BOOST_GCC >= 40600)
#pragma GCC diagnostic push #pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-align" #pragma GCC diagnostic ignored "-Wcast-align"
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
#endif #endif
const vector_type& v = reinterpret_cast<const vector_type&>(*this); const vector_type& v = reinterpret_cast<const vector_type&>(*this);
BOOST_ASSERT((std::size_t(this) % dtl::alignment_of<strawman_t>::value) == 0); BOOST_ASSERT((std::size_t(this) % dtl::alignment_of<strawman_t>::value) == 0);
const strawman_t &straw = static_cast<const strawman_t&>(v);
const sm_storage_t& stor = static_cast<const sm_storage_t&>(straw);
return boost::intrusive::pointer_traits<const_pointer>::pointer_to(*((const T*)stor.m_storage.data));
#if defined(BOOST_GCC) && (BOOST_GCC >= 40600) #if defined(BOOST_GCC) && (BOOST_GCC >= 40600)
#pragma GCC diagnostic pop #pragma GCC diagnostic pop
#endif #endif
const strawman_t &straw = static_cast<const strawman_t&>(v);
const sm_storage_t& stor = static_cast<const sm_storage_t&>(straw);
return boost::intrusive::pointer_traits<pointer>::pointer_to(*((T*)&stor.m_storage));
} }
template <class T, class VoidAlloc, class Options> template <class T, class VoidAlloc, class Options>
@@ -474,16 +476,16 @@ BOOST_CONTAINER_FORCEINLINE typename small_vector_allocator<T, VoidAlloc, Option
#if defined(BOOST_GCC) && (BOOST_GCC >= 40600) #if defined(BOOST_GCC) && (BOOST_GCC >= 40600)
#pragma GCC diagnostic push #pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wcast-align" #pragma GCC diagnostic ignored "-Wcast-align"
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
#endif #endif
vector_type& v = reinterpret_cast<vector_type&>(*this); vector_type& v = reinterpret_cast<vector_type&>(*this);
BOOST_ASSERT((std::size_t(this) % dtl::alignment_of<strawman_t>::value) == 0); BOOST_ASSERT((std::size_t(this) % dtl::alignment_of<strawman_t>::value) == 0);
strawman_t &straw = static_cast<strawman_t&>(v);
sm_storage_t& stor = static_cast<sm_storage_t&>(straw);
return boost::intrusive::pointer_traits<pointer>::pointer_to(*((T*)stor.m_storage.data));
#if defined(BOOST_GCC) && (BOOST_GCC >= 40600) #if defined(BOOST_GCC) && (BOOST_GCC >= 40600)
#pragma GCC diagnostic pop #pragma GCC diagnostic pop
#endif #endif
strawman_t &straw = static_cast<strawman_t&>(v);
sm_storage_t& stor = static_cast<sm_storage_t&>(straw);
return boost::intrusive::pointer_traits<pointer>::pointer_to(*((T*)&stor.m_storage));
} }