On Fri, 1 Mar 2019 14:52:07 +0200 Jani Nikula <jani.nik...@intel.com> wrote:
> While is_power_of_2() is an inline function and likely gets optimized > for compile time constant arguments, it still doesn't produce an integer > constant expression that could be used in, say, static data > initialization or case labels. hm, what code wants to do these things? > Make is_power_of_2() an integer constant expression when possible, > otherwise using the inline function to avoid multiple evaluation of the > parameter. Spose so. But I fear that some gcc versions will get it right and others will mess it up. While this patch is under test I think it would be best to also have at least one or two callsites which actually use the compile-time evaluation feature. Possible?
