https://bugs.llvm.org/show_bug.cgi?id=39471
Bug ID: 39471
Summary: ext_vector_type as c++11 attribute with clang::
prefix.
Product: clang
Version: 7.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: OpenCL
Assignee: unassignedclangb...@nondot.org
Reporter: l...@marehr.dialup.fu-berlin.de
CC: anastasia.stul...@arm.com, llvm-bugs@lists.llvm.org
I would expect that the following should work
```c++
template <typename value_type, unsigned length>
struct simd
{
// using type = value_type __attribute__((ext_vector_type(length))); works
using type [[clang::ext_vector_type(length)]] = value_type; // does not work
};
using int32x16_t = simd<int, 16>::type;
```
but fails with the following message:
```terminal
warning: unknown attribute 'ext_vector_type' ignored [-Wunknown-attributes]
using type [[clang::ext_vector_type(length)]] = value_type;
^
```
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