https://bugs.llvm.org/show_bug.cgi?id=34878
Bug ID: 34878
Summary: Can this constraint be relaxed? 'vector_size'
attribute requires an integer constant
Product: clang
Version: 5.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Hi clang team,
I wanted to ask if you could relax this restriction:
```
#include <cstddef>
#include <type_traits>
template <typename scalar_t, size_t length>
struct builtin_simd
{
using type [[gnu::vector_size(sizeof(scalar_t) * length)]] = scalar_t;
};
int main() {
using scalar_t = int;
constexpr size_t length = 4u;
using int32x4_t [[gnu::vector_size (sizeof(scalar_t) * length)]] =
scalar_t;
static_assert(std::is_same<int32x4_t, builtin_simd<scalar_t,
length>::type>::value, "");
return 0;
}
```
Gcc allows this.
Thank you!
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