Hi,
I experience a miscompile with GCC 4.6.0 (#48616) and was trying to implement
a workaround in my library, but no success. The bug is connected to use of the
XOP instruction set and -ftree-vectorize. So I thought I can just disable one
or both of those in the function where the miscompile happens. But that
function is a member of a template class and thus inlined. Apparently that
leads to neither "#pragma GCC optimize/target" nor
"__attribute__((optimize/target))" changing anything, or is that another bug?
Anyway this is what I got:
#define VC_WORKAROUND __attribute__((optimize("no-tree-vectorize"),target("no-
xop")))
template<> inline Vector<T> &VC_WORKAROUND VectorBase<T>::operator>>=(const
VectorBase<T> &x)
{
for_all_vector_entries(i,
d.m(i) >>= x.d.m(i);
);
return *static_cast<Vector<T> *>(this);
}
vector.tcc:286:1: sorry, unimplemented: inlining failed in call to
âVc::SSE::Vector<T>& Vc::SSE::VectorBase<T>::operator<<=(const
Vc::SSE::VectorBase<T>&) [with T = int]â: target specific option mismatch
Any suggestions how to implement a workaround?
Cheers,
Matthias
--
Dipl.-Phys. Matthias Kretz
http://compeng.uni-frankfurt.de/?mkretz
SIMD easy and portable: http://compeng.uni-frankfurt.de/?vc
