misc-ps-ranges.m revision 7f649d749f18b3499456d7ae6a69f3bbd7cf7cdc 
1// RUN: %clang_cc1 -analyze -analyzer-checker=core,core.experimental -analyzer-check-objc-mem -analyzer-store=basic -analyzer-constraints=range -verify -fblocks %s
2// RUN: %clang_cc1 -analyze -analyzer-checker=core,core.experimental -analyzer-check-objc-mem -analyzer-store=region -analyzer-constraints=range -verify -fblocks %s
3
4// <rdar://problem/6776949>
5// main's 'argc' argument is always > 0
6int main(int argc, char* argv[]) {
7  int *p = 0;
8
9  if (argc == 0)
10    *p = 1;
11
12  if (argc == 1)
13    return 1;
14
15  int x = 1;
16  int i;
17  
18  for(i=1;i<argc;i++){
19    p = &x;
20  }
21
22  return *p; // no-warning
23}
24
25// PR 5969: the comparison of argc < 3 || argc > 4 should constraint the switch
26//  statement from having the 'default' branch taken.  This previously reported a false
27//  positive with the use of 'v'.
28
29int pr5969(int argc, char *argv[]) {
30
31  int v;
32
33  if ((argc < 3) || (argc > 4)) return 0;
34
35  switch(argc) {
36    case 3:
37      v = 33;
38      break;
39    case 4:
40      v = 44;
41      break;
42  }
43
44  return v; // no-warning
45}
46
47int pr5969_positive(int argc, char *argv[]) {
48
49  int v;
50
51  if ((argc < 3) || (argc > 4)) return 0;
52
53  switch(argc) {
54    case 3:
55      v = 33;
56      break;
57  }
58
59  return v; // expected-warning{{Undefined or garbage value returned to caller}}
60}
61