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/* Tests for single stepping through various branch conditions */

int noscramble(int a)

{

  return a ;

}

int echo(int a)

{ return noscramble(a) ; }

int equaltest(int a,int b)

{ int retval ;

  if (a == b)

    retval = noscramble(1) ;

  else retval = noscramble(0) ;

  return retval ;

}

int neqtest(int a , int b)

{ int retval ;

  if (a != b)

    retval = echo(1) ;

  else retval = echo(2) ;

  return retval ;

}

int zerotest(int a )

{ int retval ;

  a = echo(a) ;

  if (a ==0)

    retval = echo(1) ;

  else

    retval = echo(0) ;

  retval = echo(retval) ;

  return retval ;

}

int zerotest2(int a)

{

  return (a==0) ;

}

int nonzerotest(int a)

{

  int retval ;

  if (a != 0)

    retval = echo(0) ;

  else retval = echo(1) ;

  return retval ;

}

int whiletest(int a)

{

  while (a > 0)

    {

      a-- ;

    }

  return 0 ;

}

int whiletest2(int a)

{

  while (a > 0)

    {

      a = noscramble(a) ;

      a-- ;

    }

  return a ;

}

int decr(int x) { return x - 1  ; }

int while3(int a)

{

  int b = a ;

  while (a == b)

    {

      a = echo(a) ;

      b = decr(b) ;

    }

  return a ;

}

void done (int x) { }

int main()

{

  int a,b,c,d ;

  done(1) ;

  a = echo(123456) ;

  b = echo(123456) ;

  c = echo(56789) ;

  d = echo(0) ;

#if 1

  equaltest(a,b) ;

  done(7) ;

  equaltest(a,c) ;

  done(8) ;

  whiletest(3) ;  /* worked */

  done(3) ;

  while3(3) ;

  done(6) ;

#endif  

  neqtest(a,b) ;

  neqtest(a,b) ;

  neqtest(a,c) ;

  zerotest(d) ;

  zerotest(a) ;

  done(5) ;

  nonzerotest(d) ;

  done(4) ;

  nonzerotest(a) ;

  done(111) ;

  return 1 ;

}