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Re: Speedup bitmap iterators


On 06/09/2010 12:32 PM, Richard Guenther wrote:
> Hm. I am concerned about using __builtin_ctzl unconditionally
> as it might expand to a call to libgcc which for sure wouldn't be
> faster(?).
Somewhen I'd like to understand this issue better, because quite a few
years ago somebody decided that using unconditionally builtins like
__builtin_ctzl in <bitset> would be a win...

Paolo.


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