#include <metal_stdlib>

using namespace metal;
struct S {
  /* 0x0000 */ packed_uint3 v;
  /* 0x000c */ int8_t tint_pad[4];
};

void f(device S& U) {
  U.v = uint3(1u, 2u, 3u);
  U.v[0] = 1u;
  U.v[1] = 2u;
  U.v[2] = 3u;
}