Re: Builtin for consulting value analysis (better ffs() code gen)

[Florian Weimer via Gcc]

* Andrew Cooper via Gcc:

> Anyway - is there a way of doing this that I've managed to overlook?

Use __builtin_ffs?

I think there's some concern for GCC that some of the alternative x86-64
implementations do not follow the AMD and Intel behavior.

Thanks,
Florian