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Merge topic 'intel-union-placeholder'
65f6d2aa6 Fix issue with union placeholder on Intel compiler Acked-by: Kitware Robot <kwrobot@kitware.com> Merge-request: !3132
This commit is contained in:
commit
415623988f
17
docs/changelog/intel-union-placeholder.md
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17
docs/changelog/intel-union-placeholder.md
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@ -0,0 +1,17 @@
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# Fix issue with union placeholder on Intel compiler
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We have run into an issue with some Intel compilers where if a `union`
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contains a `struct` that has some padding for byte alignment, the value
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copy might skip over that padding even when the `union` contains a different
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type where those bytes are valid. This breaks the value copy of our
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`Variant` class.
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This is not a unique problem. We have seen the same thing in other
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compilers and already have a workaround for when this happens. The
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workaround creates a special struct that has no padding placed at the front
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of the `union`. The Intel compiler adds a fun twist in that this
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placeholder structure only works if the alignment is at least as high as
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the struct that follows it.
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To get around this problem, make the alignment of the placeholder `struct`
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at large as possible for the size of the `union`.
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@ -25,6 +25,7 @@
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#include <vtkmstd/is_trivial.h>
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#include <algorithm>
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#include <cstddef>
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#include <type_traits>
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@ -74,34 +75,89 @@ constexpr std::size_t MaxSizeOf()
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}
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#endif
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// --------------------------------------------------------------------------------
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// Helper functions to determine the maximum alignment size.
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template <typename... Ts>
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constexpr std::size_t MaxAlignmentOf()
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{
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return std::max({ std::alignment_of<Ts>::value... });
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}
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// --------------------------------------------------------------------------------
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// Placeholder for a fully used structure of the given type.
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template <std::size_t Size, bool = (Size > 8)>
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struct SizedPlaceholder
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{
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VTKM_STATIC_ASSERT(Size > 0);
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vtkm::Int8 A;
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SizedPlaceholder<Size - 1> B;
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};
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// This placeholder is used for compilers that do not correctly copy `struct`s
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// in `union`s where some of the `struct`s have padding. This is added to the
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// front of the `union` for the compiler to pick up and use.
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//
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// It is normally sufficient to have a full `struct`, but we have also encountered
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// compilers that only use it if the alignment is at least as large. But we
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// don't want the alignment too large because it can add unwanted padding
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// elsewhere. Also, adding `alignas` did not work to resolve this problem for
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// the compiler.
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template <std::size_t Alignment>
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struct TypeForAlignmentImpl;
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template <>
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struct SizedPlaceholder<1, false>
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struct TypeForAlignmentImpl<8>
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{
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vtkm::Int8 A;
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using type = vtkm::Int64;
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};
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template <>
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struct TypeForAlignmentImpl<4>
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{
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using type = vtkm::Int32;
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};
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template <>
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struct TypeForAlignmentImpl<2>
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{
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using type = vtkm::Int16;
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};
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template <>
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struct TypeForAlignmentImpl<1>
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{
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using type = vtkm::Int8;
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};
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template <std::size_t Alignment>
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using TypeForAlignment = typename TypeForAlignmentImpl<Alignment>::type;
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template <std::size_t Size, typename Word, bool = (Size >= 4)>
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struct SizedPlaceholderImpl;
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template <std::size_t Size, typename Word>
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struct SizedPlaceholderImpl<Size, Word, true>
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{
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Word A;
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Word B;
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Word C;
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Word D;
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SizedPlaceholderImpl<Size - 4, Word> E;
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};
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template <typename Word>
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struct SizedPlaceholderImpl<4, Word, true>
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{
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Word A;
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Word B;
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Word C;
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Word D;
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};
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template <std::size_t Size>
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struct SizedPlaceholder<Size, true>
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template <std::size_t Size, typename Word>
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struct SizedPlaceholderImpl<Size, Word, false>
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{
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Word A;
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SizedPlaceholderImpl<Size - 1, Word> B;
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};
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template <typename Word>
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struct SizedPlaceholderImpl<1, Word, false>
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{
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Word A;
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};
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template <typename... Ts>
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struct SizedPlaceholder
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: SizedPlaceholderImpl<(MaxSizeOf<Ts...>() / MaxAlignmentOf<Ts...>()),
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TypeForAlignment<MaxAlignmentOf<Ts...>()>>
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{
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vtkm::Int8 A;
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vtkm::Int8 B;
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vtkm::Int8 C;
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vtkm::Int8 D;
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vtkm::Int8 E;
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vtkm::Int8 F;
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vtkm::Int8 G;
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vtkm::Int8 H;
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SizedPlaceholder<Size - 8> I;
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};
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// clang-format off
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@ -147,10 +203,9 @@ union VariantUnionNTD;
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template <typename T0>
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union VariantUnionTD<T0>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0> Placeholder;
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T0 V0;
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VTK_M_DEVICE VariantUnionTD(vtkm::internal::NullType) { }
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@ -159,10 +214,9 @@ union VariantUnionTD<T0>
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template <typename T0>
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union VariantUnionNTD<T0>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0> Placeholder;
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T0 V0;
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VTK_M_DEVICE VariantUnionNTD(vtkm::internal::NullType) { }
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@ -173,10 +227,9 @@ union VariantUnionNTD<T0>
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template <typename T0, typename T1>
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union VariantUnionTD<T0, T1>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1> Placeholder;
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T0 V0;
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T1 V1;
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@ -186,10 +239,9 @@ union VariantUnionTD<T0, T1>
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template <typename T0, typename T1>
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union VariantUnionNTD<T0, T1>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1> Placeholder;
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T0 V0;
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T1 V1;
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@ -201,10 +253,9 @@ union VariantUnionNTD<T0, T1>
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template <typename T0, typename T1, typename T2>
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union VariantUnionTD<T0, T1, T2>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1, T2>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1, T2> Placeholder;
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T0 V0;
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T1 V1;
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@ -215,10 +266,9 @@ union VariantUnionTD<T0, T1, T2>
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template <typename T0, typename T1, typename T2>
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union VariantUnionNTD<T0, T1, T2>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1, T2>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1, T2> Placeholder;
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T0 V0;
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T1 V1;
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@ -231,10 +281,9 @@ union VariantUnionNTD<T0, T1, T2>
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template <typename T0, typename T1, typename T2, typename T3>
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union VariantUnionTD<T0, T1, T2, T3>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1, T2, T3> Placeholder;
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T0 V0;
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T1 V1;
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@ -246,10 +295,9 @@ union VariantUnionTD<T0, T1, T2, T3>
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template <typename T0, typename T1, typename T2, typename T3>
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union VariantUnionNTD<T0, T1, T2, T3>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1, T2, T3> Placeholder;
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T0 V0;
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T1 V1;
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@ -263,10 +311,9 @@ union VariantUnionNTD<T0, T1, T2, T3>
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template <typename T0, typename T1, typename T2, typename T3, typename T4>
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union VariantUnionTD<T0, T1, T2, T3, T4>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1, T2, T3, T4> Placeholder;
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T0 V0;
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T1 V1;
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@ -279,10 +326,9 @@ union VariantUnionTD<T0, T1, T2, T3, T4>
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template <typename T0, typename T1, typename T2, typename T3, typename T4>
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union VariantUnionNTD<T0, T1, T2, T3, T4>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1, T2, T3, T4> Placeholder;
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T0 V0;
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T1 V1;
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@ -297,10 +343,9 @@ union VariantUnionNTD<T0, T1, T2, T3, T4>
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template <typename T0, typename T1, typename T2, typename T3, typename T4, typename T5>
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union VariantUnionTD<T0, T1, T2, T3, T4, T5>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
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// everthing to be copied.
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SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4, T5>()> Placeholder;
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// Work around issue where some compilers miss initializing some struct members if another entry
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
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SizedPlaceholder<T0, T1, T2, T3, T4, T5> Placeholder;
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T0 V0;
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T1 V1;
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@ -314,10 +359,9 @@ union VariantUnionTD<T0, T1, T2, T3, T4, T5>
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template <typename T0, typename T1, typename T2, typename T3, typename T4, typename T5>
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union VariantUnionNTD<T0, T1, T2, T3, T4, T5>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
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// if another entry in the varient has a struct with padding. Place an item that requires
|
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// everthing to be copied.
|
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SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4, T5>()> Placeholder;
|
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// Work around issue where some compilers miss initializing some struct members if another entry
|
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// in the varient has a struct with padding. Place an item that requires everthing to be copied.
|
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SizedPlaceholder<T0, T1, T2, T3, T4, T5> Placeholder;
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T0 V0;
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T1 V1;
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@ -333,10 +377,9 @@ union VariantUnionNTD<T0, T1, T2, T3, T4, T5>
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template <typename T0, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6>
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union VariantUnionTD<T0, T1, T2, T3, T4, T5, T6>
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{
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// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
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// if another entry in the varient has a struct with padding. Place an item that requires
|
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// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4, T5, T6>()> Placeholder;
|
||||
// Work around issue where some compilers miss initializing some struct members if another entry
|
||||
// in the varient has a struct with padding. Place an item that requires everthing to be copied.
|
||||
SizedPlaceholder<T0, T1, T2, T3, T4, T5, T6> Placeholder;
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||||
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T0 V0;
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T1 V1;
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@ -351,10 +394,9 @@ union VariantUnionTD<T0, T1, T2, T3, T4, T5, T6>
|
||||
template <typename T0, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6>
|
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union VariantUnionNTD<T0, T1, T2, T3, T4, T5, T6>
|
||||
{
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4, T5, T6>()> Placeholder;
|
||||
// Work around issue where some compilers miss initializing some struct members if another entry
|
||||
// in the varient has a struct with padding. Place an item that requires everthing to be copied.
|
||||
SizedPlaceholder<T0, T1, T2, T3, T4, T5, T6> Placeholder;
|
||||
|
||||
T0 V0;
|
||||
T1 V1;
|
||||
@ -371,10 +413,9 @@ union VariantUnionNTD<T0, T1, T2, T3, T4, T5, T6>
|
||||
template <typename T0, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7>
|
||||
union VariantUnionTD<T0, T1, T2, T3, T4, T5, T6, T7>
|
||||
{
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4, T5, T6, T7>()> Placeholder;
|
||||
// Work around issue where some compilers miss initializing some struct members if another entry
|
||||
// in the varient has a struct with padding. Place an item that requires everthing to be copied.
|
||||
SizedPlaceholder<T0, T1, T2, T3, T4, T5, T6, T7> Placeholder;
|
||||
|
||||
T0 V0;
|
||||
T1 V1;
|
||||
@ -390,10 +431,9 @@ union VariantUnionTD<T0, T1, T2, T3, T4, T5, T6, T7>
|
||||
template <typename T0, typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7>
|
||||
union VariantUnionNTD<T0, T1, T2, T3, T4, T5, T6, T7>
|
||||
{
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4, T5, T6, T7>()> Placeholder;
|
||||
// Work around issue where some compilers miss initializing some struct members if another entry
|
||||
// in the varient has a struct with padding. Place an item that requires everthing to be copied.
|
||||
SizedPlaceholder<T0, T1, T2, T3, T4, T5, T6, T7> Placeholder;
|
||||
|
||||
T0 V0;
|
||||
T1 V1;
|
||||
@ -415,7 +455,7 @@ union VariantUnionTD<T0, T1, T2, T3, T4, T5, T6, T7, T8, Ts...>
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4, T5, T6, T7, T8, Ts...>()> Placeholder;
|
||||
SizedPlaceholder<T0, T1, T2, T3, T4, T5, T6, T7, T8, Ts...> Placeholder;
|
||||
|
||||
T0 V0;
|
||||
T1 V1;
|
||||
@ -437,7 +477,7 @@ union VariantUnionNTD<T0, T1, T2, T3, T4, T5, T6, T7, T8, Ts...>
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<T0, T1, T2, T3, T4, T5, T6, T7, T8, Ts...>()> Placeholder;
|
||||
SizedPlaceholder<T0, T1, T2, T3, T4, T5, T6, T7, T8, Ts...> Placeholder;
|
||||
|
||||
T0 V0;
|
||||
T1 V1;
|
||||
|
@ -37,6 +37,7 @@ $# Ignore the following comment. It is meant for the generated file.
|
||||
#include <vtkmstd/is_trivial.h>
|
||||
|
||||
#include <algorithm>
|
||||
#include <cstddef>
|
||||
#include <type_traits>
|
||||
|
||||
$py(max_expanded=8)\
|
||||
@ -107,34 +108,89 @@ constexpr std::size_t MaxSizeOf()
|
||||
}
|
||||
#endif
|
||||
|
||||
// --------------------------------------------------------------------------------
|
||||
// Helper functions to determine the maximum alignment size.
|
||||
template <typename... Ts>
|
||||
constexpr std::size_t MaxAlignmentOf()
|
||||
{
|
||||
return std::max({ std::alignment_of<Ts>::value... });
|
||||
}
|
||||
|
||||
// --------------------------------------------------------------------------------
|
||||
// Placeholder for a fully used structure of the given type.
|
||||
template <std::size_t Size, bool = (Size > 8)>
|
||||
struct SizedPlaceholder
|
||||
{
|
||||
VTKM_STATIC_ASSERT(Size > 0);
|
||||
vtkm::Int8 A;
|
||||
SizedPlaceholder<Size - 1> B;
|
||||
};
|
||||
// This placeholder is used for compilers that do not correctly copy `struct`s
|
||||
// in `union`s where some of the `struct`s have padding. This is added to the
|
||||
// front of the `union` for the compiler to pick up and use.
|
||||
//
|
||||
// It is normally sufficient to have a full `struct`, but we have also encountered
|
||||
// compilers that only use it if the alignment is at least as large. But we
|
||||
// don't want the alignment too large because it can add unwanted padding
|
||||
// elsewhere. Also, adding `alignas` did not work to resolve this problem for
|
||||
// the compiler.
|
||||
|
||||
template <std::size_t Alignment>
|
||||
struct TypeForAlignmentImpl;
|
||||
template <>
|
||||
struct SizedPlaceholder<1, false>
|
||||
struct TypeForAlignmentImpl<8>
|
||||
{
|
||||
vtkm::Int8 A;
|
||||
using type = vtkm::Int64;
|
||||
};
|
||||
template <>
|
||||
struct TypeForAlignmentImpl<4>
|
||||
{
|
||||
using type = vtkm::Int32;
|
||||
};
|
||||
template <>
|
||||
struct TypeForAlignmentImpl<2>
|
||||
{
|
||||
using type = vtkm::Int16;
|
||||
};
|
||||
template <>
|
||||
struct TypeForAlignmentImpl<1>
|
||||
{
|
||||
using type = vtkm::Int8;
|
||||
};
|
||||
template <std::size_t Alignment>
|
||||
using TypeForAlignment = typename TypeForAlignmentImpl<Alignment>::type;
|
||||
|
||||
template <std::size_t Size, typename Word, bool = (Size >= 4)>
|
||||
struct SizedPlaceholderImpl;
|
||||
|
||||
template <std::size_t Size, typename Word>
|
||||
struct SizedPlaceholderImpl<Size, Word, true>
|
||||
{
|
||||
Word A;
|
||||
Word B;
|
||||
Word C;
|
||||
Word D;
|
||||
SizedPlaceholderImpl<Size - 4, Word> E;
|
||||
};
|
||||
template <typename Word>
|
||||
struct SizedPlaceholderImpl<4, Word, true>
|
||||
{
|
||||
Word A;
|
||||
Word B;
|
||||
Word C;
|
||||
Word D;
|
||||
};
|
||||
|
||||
template <std::size_t Size>
|
||||
struct SizedPlaceholder<Size, true>
|
||||
template <std::size_t Size, typename Word>
|
||||
struct SizedPlaceholderImpl<Size, Word, false>
|
||||
{
|
||||
Word A;
|
||||
SizedPlaceholderImpl<Size - 1, Word> B;
|
||||
};
|
||||
template <typename Word>
|
||||
struct SizedPlaceholderImpl<1, Word, false>
|
||||
{
|
||||
Word A;
|
||||
};
|
||||
|
||||
template <typename... Ts>
|
||||
struct SizedPlaceholder
|
||||
: SizedPlaceholderImpl<(MaxSizeOf<Ts...>() / MaxAlignmentOf<Ts...>()),
|
||||
TypeForAlignment<MaxAlignmentOf<Ts...>()>>
|
||||
{
|
||||
vtkm::Int8 A;
|
||||
vtkm::Int8 B;
|
||||
vtkm::Int8 C;
|
||||
vtkm::Int8 D;
|
||||
vtkm::Int8 E;
|
||||
vtkm::Int8 F;
|
||||
vtkm::Int8 G;
|
||||
vtkm::Int8 H;
|
||||
SizedPlaceholder<Size - 8> I;
|
||||
};
|
||||
|
||||
// clang-format off
|
||||
@ -181,10 +237,9 @@ $for(param_length in range(max_expanded))\
|
||||
template <$typename_list(param_length)>
|
||||
union VariantUnionTD<$type_list(param_length)>
|
||||
{
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<$type_list(param_length)>()> Placeholder;
|
||||
// Work around issue where some compilers miss initializing some struct members if another entry
|
||||
// in the varient has a struct with padding. Place an item that requires everthing to be copied.
|
||||
SizedPlaceholder<$type_list(param_length)> Placeholder;
|
||||
|
||||
$for(param_index in range(param_length + 1))\
|
||||
T$(param_index) V$(param_index);
|
||||
@ -195,10 +250,9 @@ $endfor\
|
||||
template <$typename_list(param_length)>
|
||||
union VariantUnionNTD<$type_list(param_length)>
|
||||
{
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<$type_list(param_length)>()> Placeholder;
|
||||
// Work around issue where some compilers miss initializing some struct members if another entry
|
||||
// in the varient has a struct with padding. Place an item that requires everthing to be copied.
|
||||
SizedPlaceholder<$type_list(param_length)> Placeholder;
|
||||
|
||||
$for(param_index in range(param_length + 1))\
|
||||
T$(param_index) V$(param_index);
|
||||
@ -216,7 +270,7 @@ union VariantUnionTD<$type_list(max_expanded), Ts...>
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<$type_list(max_expanded), Ts...>()> Placeholder;
|
||||
SizedPlaceholder<$type_list(max_expanded), Ts...> Placeholder;
|
||||
|
||||
$for(param_index in range(max_expanded))\
|
||||
T$(param_index) V$(param_index);
|
||||
@ -233,7 +287,7 @@ union VariantUnionNTD<$type_list(max_expanded), Ts...>
|
||||
// Work around issue where CUDA sometimes seems to miss initializing some struct members
|
||||
// if another entry in the varient has a struct with padding. Place an item that requires
|
||||
// everthing to be copied.
|
||||
SizedPlaceholder<MaxSizeOf<$type_list(max_expanded), Ts...>()> Placeholder;
|
||||
SizedPlaceholder<$type_list(max_expanded), Ts...> Placeholder;
|
||||
|
||||
$for(param_index in range(max_expanded))\
|
||||
T$(param_index) V$(param_index);
|
||||
|
Loading…
Reference in New Issue
Block a user