1// RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core -analyzer-store=region -verify -fblocks %s
2
3// <rdar://problem/6776949>
4// main's 'argc' argument is always > 0
5int main(int argc, char* argv[]) {
6  int *p = 0;
7
8  if (argc == 0)
9    *p = 1;
10
11  if (argc == 1)
12    return 1;
13
14  int x = 1;
15  int i;
16
17  for(i=1;i<argc;i++){
18    p = &x;
19  }
20
21  return *p; // no-warning
22}
23
24// PR 5969: the comparison of argc < 3 || argc > 4 should constraint the switch
25//  statement from having the 'default' branch taken.  This previously reported a false
26//  positive with the use of 'v'.
27
28int pr5969(int argc, char *argv[]) {
29
30  int v;
31
32  if ((argc < 3) || (argc > 4)) return 0;
33
34  switch(argc) {
35    case 3:
36      v = 33;
37      break;
38    case 4:
39      v = 44;
40      break;
41  }
42
43  return v; // no-warning
44}
45
46int pr5969_positive(int argc, char *argv[]) {
47
48  int v;
49
50  if ((argc < 3) || (argc > 4)) return 0;
51
52  switch(argc) {
53    case 3:
54      v = 33;
55      break;
56  }
57
58  return v; // expected-warning{{Undefined or garbage value returned to caller}}
59}
60