forked from OSchip/llvm-project
60 lines
1.0 KiB
Objective-C
60 lines
1.0 KiB
Objective-C
// RUN: %clang_analyze_cc1 -analyzer-checker=core,alpha.core -analyzer-store=region -verify -fblocks %s
|
|
|
|
// <rdar://problem/6776949>
|
|
// main's 'argc' argument is always > 0
|
|
int main(int argc, char* argv[]) {
|
|
int *p = 0;
|
|
|
|
if (argc == 0)
|
|
*p = 1;
|
|
|
|
if (argc == 1)
|
|
return 1;
|
|
|
|
int x = 1;
|
|
int i;
|
|
|
|
for(i=1;i<argc;i++){
|
|
p = &x;
|
|
}
|
|
|
|
return *p; // no-warning
|
|
}
|
|
|
|
// PR 5969: the comparison of argc < 3 || argc > 4 should constraint the switch
|
|
// statement from having the 'default' branch taken. This previously reported a false
|
|
// positive with the use of 'v'.
|
|
|
|
int pr5969(int argc, char *argv[]) {
|
|
|
|
int v;
|
|
|
|
if ((argc < 3) || (argc > 4)) return 0;
|
|
|
|
switch(argc) {
|
|
case 3:
|
|
v = 33;
|
|
break;
|
|
case 4:
|
|
v = 44;
|
|
break;
|
|
}
|
|
|
|
return v; // no-warning
|
|
}
|
|
|
|
int pr5969_positive(int argc, char *argv[]) {
|
|
|
|
int v;
|
|
|
|
if ((argc < 3) || (argc > 4)) return 0;
|
|
|
|
switch(argc) {
|
|
case 3:
|
|
v = 33;
|
|
break;
|
|
}
|
|
|
|
return v; // expected-warning{{Undefined or garbage value returned to caller}}
|
|
}
|