Neil Conway <neilc@samurai.com> writes:
> Regarding __builtin_constant_p(), it is obviously the case that we need
> to ensure the code compiles on a wide variety of C compilers. But I
> don't see the harm in using GCC-specific features where (a) they can be
> easily #ifdef'd away when not using GCC (b) they have a very limited
> impact -- i.e. they do not result in using a lot of #ifdefs, or
> significantly changing the behavior of the code.
No argument on either of those --- just on the conclusion that we can
optimize on the assumption that that optimization will happen.
regards, tom lane
