1 /* This bug exists in gcc-2.95, egcs-1.1.2, gcc-2.7.2 and probably
2 every other version as well. */
3
4 typedef struct int3 { int a, b, c; } int3;
5
6 int3
one(void)7 one (void)
8 {
9 return (int3) { 1, 1, 1 };
10 }
11
12 int3
zero(void)13 zero (void)
14 {
15 return (int3) { 0, 0, 0 };
16 }
17
18 int
main(void)19 main (void)
20 {
21 int3 a;
22
23 /* gcc allocates a temporary for the inner expression statement
24 to store the return value of `one'.
25
26 gcc frees the temporaries for the inner expression statement.
27
28 gcc realloates the same temporary slot to store the return
29 value of `zero'.
30
31 gcc expands the call to zero ahead of the expansion of the
32 statement expressions. The temporary gets the value of `zero'.
33
34 gcc expands statement expressions and the stale temporary is
35 clobbered with the value of `one'. The bad value is copied from
36 the temporary into *&a. */
37
38 *({ ({ one (); &a; }); }) = zero ();
39 if (a.a && a.b && a.c)
40 abort ();
41 exit (0);
42 }
43