On 09/07/2016 11:56 PM, Jason Merrill wrote:
Various places in GCC use negate, bit-and and compare to test whether an integer is a power of 2, but I think it would be clearer for this test to be wrapped in a function.OK for trunk?
I think the canonical way we've written that is exact_log2 (x) != -1 Though you could argue that's far from obvious. Presumably you have a follow-up to start using pow2p_hwi? jeff
