|[eigen] wrong result when not inlining (at least with vs.net)|
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Hi, after debugging for a long long time I found out that the attached trivial test program does not print out a zero when the operator 106: operator* (const Transform<Scalar,Dim,Mode>& tr, const Homogeneous& rhs) from the Homogenous header is not inlined. As the topic indicates this test is currently only true for VC++ 2008 (9.0.30729.1 SP). The result turns out to be correct as soon as Configuration Properties -> C/C++ -> Optimization -> Inline Function Expansion -> /Ob1 or /Ob2 as a consequence one has to set Configuration Properties -> C/C++ -> General -> Debug Information Format -> /Zi (not /ZI) I have no clue what is the reason for this behaviour and I also tried to isolate the problem by extracting ei_homogeneous_left_product_impl into a test program but as soon as the operator* call is gone, it is working. What happens when the function is not inlined is that ei_homogeneous_right_product_impl::m_lhs becomes invalid when the function reaches the body of 244: template<typename Dest> void evalTo(Dest& dst) const even though in the ctor ei_homogeneous_right_product_impl::m_lhs is still valid and can even be printed. I have no clue what happens on other systems or where exactly this subtle error is coming from. If other VC++ users could confirm the issue or in case somebody could point me to the actual problem it would be more than welcome. Regards, Hauke p.s. I did not check the MSDN knowledge base whether this is a known compiler issue or such.
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