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kit
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fparith_double_mul.c (282B)

      1 /* Double FMUL round-trip. volatile int inputs -> double so a real FMUL (double)
      2  * is emitted. 6.0 * 7.0 = 42.0; (int)42.0 == 42. */
      3 int test_main(void) {
      4   volatile int ia = 6, ib = 7;
      5   double a = (double)ia, b = (double)ib;
      6   double r = a * b;
      7   return (int)r == 42 ? 42 : 0;
      8 }