ref: 1e3dd27b9b1dcd2c8f16a0f51effaade0e12c227 dir: /tests/execute/0037-assignop.c/
int main() { int x; x = 0; x += 2; x += 2; if (x != 4) return 1; x -= 1; if (x != 3) return 2; x *= 2; if (x != 6) return 3; return 0; }