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Add is_constant_evaluated, update alignment checks

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Tobias Schlüter 2022-03-25 04:00:58 +00:00 committed by Antonio Sánchez
parent f0a91838aa
commit e22d58e816
3 changed files with 13 additions and 4 deletions
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4
Eigen/src/Core/CoreEvaluators.h
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@ -1225,8 +1225,8 @@ struct block_evaluator<ArgType, BlockRows, BlockCols, InnerPanel, /* HasDirectAc
explicit block_evaluator(const XprType& block)
: mapbase_evaluator<XprType, typename XprType::PlainObject>(block)
{
// TODO: for the 3.3 release, this should be turned to an internal assertion, but let's keep it as is for the beta lifetime
eigen_assert(((internal::UIntPtr(block.data()) % plain_enum_max(1,evaluator<XprType>::Alignment)) == 0) && "data is not aligned");
eigen_internal_assert((internal::is_constant_evaluated() || (internal::UIntPtr(block.data()) % plain_enum_max(1,evaluator<XprType>::Alignment)) == 0) \
&& "data is not aligned");
}
};

5
Eigen/src/Core/DenseStorage.h
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@ -69,13 +69,14 @@ struct plain_array
template<typename PtrType>
EIGEN_ALWAYS_INLINE PtrType eigen_unaligned_array_assert_workaround_gcc47(PtrType array) { return array; }
#define EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(sizemask) \
eigen_assert((internal::UIntPtr(eigen_unaligned_array_assert_workaround_gcc47(array)) & (sizemask)) == 0 \
eigen_assert((internal::is_constant_evaluated() \
|| (internal::UIntPtr(eigen_unaligned_array_assert_workaround_gcc47(array)) & (sizemask)) == 0) \
&& "this assertion is explained here: " \
"http://eigen.tuxfamily.org/dox-devel/group__TopicUnalignedArrayAssert.html" \
" **** READ THIS WEB PAGE !!! ****");
#else
#define EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(sizemask) \
eigen_assert((internal::UIntPtr(array) & (sizemask)) == 0 \
eigen_assert((internal::is_constant_evaluated() || (internal::UIntPtr(array) & (sizemask)) == 0) \
&& "this assertion is explained here: " \
"http://eigen.tuxfamily.org/dox-devel/group__TopicUnalignedArrayAssert.html" \
" **** READ THIS WEB PAGE !!! ****");

8
Eigen/src/Core/util/Meta.h
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@ -508,6 +508,14 @@ inline constexpr bool logical_xor(bool a, bool b) {
inline constexpr bool check_implication(bool a, bool b) {
return !a || b;
}
/// \internal Provide fallback for std::is_constant_evaluated for pre-C++20.
#if EIGEN_COMP_CXXVER >= 20
using std::is_constant_evaluated;
#else
constexpr bool is_constant_evaluated() { return false; }
#endif
} // end namespace internal
} // end namespace Eigen