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1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-checker=core,debug.ExprInspection %s -std=c++11 -verify
2 
3 void clang_analyzer_eval(bool);
4 
testAddressof(int x)5 void testAddressof(int x) {
6   clang_analyzer_eval(&x == __builtin_addressof(x)); // expected-warning{{TRUE}}
7 }
8 
testSize()9 void testSize() {
10   struct {
11     int x;
12     int y;
13     char z;
14   } object;
15   clang_analyzer_eval(__builtin_object_size(&object.y, 0) == sizeof(object) - sizeof(int)); // expected-warning{{TRUE}}
16 
17   // Clang can't actually evaluate these builtin "calls", but importantly they don't actually evaluate the argument expression either.
18   int i = 0;
19   char buf[10];
20   clang_analyzer_eval(__builtin_object_size(&buf[i++], 0) == sizeof(buf)); // expected-warning{{FALSE}}
21   clang_analyzer_eval(__builtin_object_size(&buf[++i], 0) == sizeof(buf) - 1); // expected-warning{{FALSE}}
22 
23   clang_analyzer_eval(i == 0); // expected-warning{{TRUE}}
24 }
25 
test_assume_aligned_1(char * p)26 void test_assume_aligned_1(char *p) {
27   char *q;
28 
29   q = (char*) __builtin_assume_aligned(p, 16);
30   clang_analyzer_eval(p == q); // expected-warning{{TRUE}}
31 }
32 
test_assume_aligned_2(char * p)33 void test_assume_aligned_2(char *p) {
34   char *q;
35 
36   q = (char*) __builtin_assume_aligned(p, 16, 8);
37   clang_analyzer_eval(p == q); // expected-warning{{TRUE}}
38 }
39 
test_assume_aligned_3(char * p)40 void test_assume_aligned_3(char *p) {
41   void *q;
42 
43   q = __builtin_assume_aligned(p, 16, 8);
44   clang_analyzer_eval(p == q); // expected-warning{{TRUE}}
45 }
46 
test_assume_aligned_4(char * p)47 void test_assume_aligned_4(char *p) {
48   char *q;
49 
50   q = (char*) __builtin_assume_aligned(p + 1, 16);
51   clang_analyzer_eval(p == q); // expected-warning{{FALSE}}
52 }
53