10   int a;  in test()  local
12   a + ++a; // expected-warning {{unsequenced modification and access to 'a'}}  in test()
13   a = ++a; // expected-warning {{multiple unsequenced modifications to 'a'}}  in test()
14   a + a++; // expected-warning {{unsequenced modification and access to 'a'}}  in test()
15   a = a++; // expected-warning {{multiple unsequenced modifications to 'a'}}  in test()
16   (a++, a++); // ok  in test()
17   ++a + ++a; // expected-warning {{multiple unsequenced modifications}}  in test()
18   a++ + a++; // expected-warning {{multiple unsequenced modifications}}  in test()
19   a = xs[++a]; // expected-warning {{multiple unsequenced modifications}}  in test()
20   a = xs[a++]; // expected-warning {{multiple unsequenced modifications}}  in test()
21   a = (++a, ++a); // expected-warning {{multiple unsequenced modifications}}  in test()
22   a = (a++, ++a); // expected-warning {{multiple unsequenced modifications}}  in test()
23   a = (a++, a++); // expected-warning {{multiple unsequenced modifications}}  in test()
24   f(a, a); // ok  in test()
25   f(a = 0, a); // expected-warning {{unsequenced modification and access}}  in test()
26   f(a, a += 0); // expected-warning {{unsequenced modification and access}}  in test()
27   f(a = 0, a = 0); // expected-warning {{multiple unsequenced modifications}}  in test()
28   a = f(++a, 0); // ok  in test()
29   a = f(a++, 0); // ok  in test()
30   a = f(++a, a++); // expected-warning {{multiple unsequenced modifications}}  in test()
32   ++a + f(++a, 0); // expected-warning {{multiple unsequenced modifications}}  in test()
33   f(++a, 0) + ++a; // expected-warning {{multiple unsequenced modifications}}  in test()
34   a++ + f(a++, 0); // expected-warning {{multiple unsequenced modifications}}  in test()
35   f(a++, 0) + a++; // expected-warning {{multiple unsequenced modifications}}  in test()
37   a = ++a; // expected-warning {{multiple unsequenced modifications}}  in test()
38   a += ++a; // expected-warning {{unsequenced modification and access}}  in test()
40   A agg1 = { a++, a++ }; // expected-warning {{multiple unsequenced modifications}}  in test()
41   A agg2 = { a++ + a, a++ }; // expected-warning {{unsequenced modification and access}}  in test()
43   (xs[2] && (a = 0)) + a; // ok  in test()
44   (0 && (a = 0)) + a; // ok  in test()
45   (1 && (a = 0)) + a; // expected-warning {{unsequenced modification and access}}  in test()
47   (xs[3] || (a = 0)) + a; // ok  in test()
48   (0 || (a = 0)) + a; // expected-warning {{unsequenced modification and access}}  in test()
49   (1 || (a = 0)) + a; // ok  in test()
51   (xs[4] ? a : ++a) + a; // ok  in test()
52   (0 ? a : ++a) + a; // expected-warning {{unsequenced modification and access}}  in test()
53   (1 ? a : ++a) + a; // ok  in test()
54   (xs[5] ? ++a : ++a) + a; // FIXME: warn here  in test()
56   (++a, xs[6] ? ++a : 0) + a; // expected-warning {{unsequenced modification and access}}  in test()
60   a += (a++, a) + a; // expected-warning {{unsequenced modification and access}}  in test()
63   a = *(a++, p); // ok  in test()
64   a = a++ && a; // ok  in test()
74   a = a++ && f(a, a);  in test()
77   (a && a++) + a;  in test()
79   (xs[7] && ++a) * (!xs[7] && ++a); // ok  in test()
81   xs[0] = (a = 1, a); // ok  in test()
83   xs[8] ? ++a + a++ : 0; // expected-warning {{multiple unsequenced modifications}}  in test()
84   xs[8] ? 0 : ++a + a++; // expected-warning {{multiple unsequenced modifications}}  in test()
85   xs[8] ? ++a : a++; // ok  in test()
87   xs[8] && (++a + a++); // expected-warning {{multiple unsequenced modifications}}  in test()
88   xs[8] || (++a + a++); // expected-warning {{multiple unsequenced modifications}}  in test()
90   (__builtin_classify_type(++a) ? 1 : 0) + ++a; // ok  in test()
91   (__builtin_constant_p(++a) ? 1 : 0) + ++a; // ok  in test()
92 …(__builtin_expect(++a, 0) ? 1 : 0) + ++a; // expected-warning {{multiple unsequenced modifications…  in test()
93   _Generic(++a, default: 0) + ++a; // ok  in test()
94   sizeof(++a) + ++a; // ok  in test()
95   _Alignof(++a) + ++a; // expected-warning {{extension}}  in test()