[FFmpeg-devel] [PATCH 4/5] lavu/intmath.h: Fix UB in ff_ctz_c() and ff_ctzll_c()

[Rémi Denis-Courmont]

Can't we just use the compiler built-ins here? AFAIK, they (GCC, LLVM) use the same algorithm if the CPU doesn't support native CTZ. And they will pick the right instruction if CPU does have CTZ.

I get it that maybe it wasn't working so well 20 years ago, but we've increased compiler version requirements since then.