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// RUN: %clang_analyze_cc1 -analyzer-checker=core -verify %s
int test1(void) {
int *p = (int *)sizeof(int);
p -= 1;
return *p; // expected-warning {{Dereference of null pointer}}
}
int test2(void) {
int *p = (int *)sizeof(int);
p -= 2;
p += 1;
return *p; // expected-warning {{Dereference of null pointer}}
}
int test3(void) {
int *p = (int *)sizeof(int);
p++;
p--;
p--;
return *p; // expected-warning {{Dereference of null pointer}}
}
int test4(void) {
// This is a special case where pointer arithmetic is not calculated to
// preserve useful warnings on dereferences of null pointers.
int *p = 0;
p += 1;
return *p; // expected-warning {{Dereference of null pointer}}
}
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