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      1 void foo(void);
      2 
      3 int main(void)
      4 {
      5    foo ();
      6 
      7    for (;;)
      8 	;
      9 }
     10 
     11 int a;
     12 
     13 void foo1(void)
     14 {
     15 	a = 1;
     16 }
     17 
     18 void foo2(void)
     19 {
     20 	a = 2;
     21 }
     22 
     23 void foo3(void)
     24 {
     25 	a = 3;
     26 }
     27 
     28 
     29