Hello,
> Hmm, I'm pretty sure that the type of "signed int" << "unsigned long" is
> "signed int". (Yes it is, see 6.5.7.) "signed int" is 32 bits long and
> the largest value is 2^31-1. 2^31 overflows and the overflow behaviour
> of signed integers is undefined.
Oops, that explains a lot. So
On Sat, Jul 01, 2006 at 12:41:54AM +0200, Vincent Fourmond wrote:
> There definitely *is* a problem in the last iteration. I wonder if it is a
> compiler bug or a
> processor bug -- I can't speak assembler anymore.
This rather looks like UB or such.
> int main()
> {
> unsigned long iters;
>
Package: gcc-4.1
Version: 4.1.1-5
Severity: important
Justification: causes FTBS for at least one package (fftw)
Hello !
I simply compile and run the program attached on my amd64 box, and I get the
following results:
iteration 0, iters = 1
iteration 1, iters = 2
iteration 2, iters = 4
it
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