| Issue |
183723
|
| Summary |
[Clang] ABI mismatch between Clang and GCC when using vector types in a union
|
| Labels |
clang,
ABI,
diverges-from:gcc
|
| Assignees |
|
| Reporter |
philnik777
|
```c++
template <class T, int N>
using vec [[gnu::vector_size(N * sizeof(T))]] = T;
union S {
vec<int, 16> v;
vec<int, 4> w[4];
};
S test() {
return S{};
}
```
Clang and GCC disagree on whether the above code passes `S` in a register or on the stack.
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