#include <metal_stdlib>

using namespace metal;

#define TINT_ISOLATE_UB(VOLATILE_NAME) \
  volatile bool VOLATILE_NAME = true; \
  if (VOLATILE_NAME)

kernel void tint_symbol() {
  TINT_ISOLATE_UB(tint_volatile_true) while(true) {
    if (true) {
      break;
    } else {
      return;
    }
  }
  int const x = 5;
  return;
}