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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Can this constraint be relaxed? 'vector_size' attribute requires an integer constant"
href="https://bugs.llvm.org/show_bug.cgi?id=34878">34878</a>
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<th>Summary</th>
<td>Can this constraint be relaxed? 'vector_size' attribute requires an integer constant
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>5.0
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>llvm@marehr.dialup.fu-berlin.de
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<pre>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!</pre>
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