__builtin_clz      98 maint/gnulib/lib/count-leading-zeros.h   COUNT_LEADING_ZEROS (__builtin_clz, _BitScanReverse, unsigned int);
__builtin_clz      41 maint/gnulib/lib/integer_length.c     return NBITS - __builtin_clz (x);
__builtin_clz     644 maint/gnulib/lib/vasnprintf.c         s = __builtin_clz (msd);