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    SubjectRe: [BK+PATCH] remove __constant_memcpy
    J.A. Magallon wrote:
    > On 04.17, Jeff Garzik wrote:
    >
    >>On Thu, Apr 17, 2003 at 09:07:45AM -0700, Linus Torvalds wrote:
    >
    > [...]
    >
    >> #define memcpy(t, f, n) \
    >> (__builtin_constant_p(n) ? \
    >> __constant_memcpy3d((t),(f),(n)) : \
    >> __memcpy3d((t),(f),(n)))
    >>
    >
    >
    > Do you know if this is more efficient ? :
    >
    > __builtin_choose_expr(__builtin_constant_p(n), ... , ....)
    >
    > Perhaps ?: reaches runtime, and __builtin doesn't.


    No. The existing code (quoted above) is properly evaluated at
    compile-time...

    Jeff



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