* config/aarch64/aarch64-simd.md (clrsb<mode>2, popcount<mode>2): New
        patterns.
        * config/aarch64/aarch64-simd-builtins.def (clrsb, popcount): New
        builtins.
        * config/aarch64/arm_neon.h (vcls_s8, vcls_s16, vcls_s32, vclsq_s8,
        vclsq_s16, vclsq_s32, vcnt_p8, vcnt_s8, vcnt_u8, vcntq_p8, vcntq_s8,
        vcntq_u8): Rewrite using builtin functions.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@218464 138bc75d-0d04-0410-961f-82ee72b054a4