Re: [eigen] strange sizeof on windows

["Robert Carnecky Jr." <robin@xxxxxxxxxxxxx>]

I haven't used eigen for a while, but in beta2 I had a similar problem.

The offset of the actual float variable in the matrix was not zero for me,
due to some zero-sized structure or base class taking up actual memory.

The code generation was also incredibly bad (call stack depth of 5+ for 
a*x+y),
but as I paused my project at that time, I did not check whether it was 
my fault.

Robert

Benoit Jacob wrote:
> Hi,
>
> Yesterday with Armin we hit a very very strange issue with MSVC 2008
> (vectorization enabled).
> The test_sizeof was failing for him, on the first subtest (Matrix<float,1,1>).
> It turned out that he had sizeof(Matrix<float,1,1>)=8, sizeof(float)=4.
>
> What can possibly have happened?
> I've been thinking about possible bugs in the logic of
> ei_matrix_storage but that wouldn't be compiler-dependent and of
> course I don't have this issue here with gcc...
>
> Cheers,
> Benoit
>
> ---
>
>   



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