#include <metal_stdlib>

using namespace metal;
int c(int z) {
  int a = as_type<int>((as_type<uint>(1) + as_type<uint>(z)));
  a = as_type<int>((as_type<uint>(a) + as_type<uint>(2)));
  return a;
}

void b() {
  int b_1 = c(2);
  int const tint_symbol = b_1;
  int const tint_symbol_1 = c(3);
  b_1 = as_type<int>((as_type<uint>(tint_symbol) + as_type<uint>(tint_symbol_1)));
}

