On quarta-feira, 7 de março de 2012 09.34.35, Rohan McGovern wrote:
> Does anyone have a suggestion on how to fix this warning?
>
> This code in qlist.h:
>
> 409: template <typename T>
> 410: Q_INLINE_TEMPLATE void QList<T>::node_destruct(Node *from, Node *to)
> 411: {
> 412: if (QTypeInfo<T>::isLarge || QTypeInfo<T>::isStatic)
> 413: while(from != to) --to, delete reinterpret_cast<T*>(to->v);
> 414: else if (QTypeInfo<T>::isComplex)
> 415: while (from != to) --to, reinterpret_cast<T*>(to)->~T();
> 416: }
> src/corelib/tools/qlist.h:415:28: error: cast from
> ‘QList<QVariant>::Node*’ to ‘QVariant*’ increases required alignment of
> target type [-Werror�st-align]
QList<QVariant>::Node is {
void *v;
}; (sizeof == 4, alignof == 4)
QVariant is {
struct Private {
union Data {
// among other things
qlonglong ll;
qulonglong ull;
double d;
};
uint type;
} d;
} (sizeof == 12, alignof == 8)
There is an increased alignment requirement in there. However, the side of the
branch being considered, line 415, is never executed because isLarge == true.
So this warning is a false positive on a line that gets never compiled.
--
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel Open Source Technology Center
Intel Sweden AB - Registration Number: 556189-6027
Knarrarnäsgatan 15, 164 40 Kista, Stockholm, Sweden
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