1 // RUN: %clang_cc1 %s -verify -Wsizeof-array-div -fsyntax-only -triple=x86_64-linux-gnu
2 // RUN: %clang_cc1 %s -verify -fsyntax-only -triple=x86_64-linux-gnu
3 
4 template <typename Ty, int N>
5 int f(Ty (&Array)[N]) {
6   return sizeof(Array) / sizeof(Ty); // Should not warn
7 }
8 
9 typedef int int32;
10 
11 void test(void) {
12   int arr[12]; // expected-note 2 {{array 'arr' declared here}}
13   unsigned long long arr2[4];
14   int *p = &arr[0];
15   int a1 = sizeof(arr) / sizeof(*arr);
16   int a2 = sizeof arr / sizeof p; // expected-warning {{expression does not compute the number of elements in this array; element type is 'int', not 'int *'}}
17   // expected-note@-1 {{place parentheses around the 'sizeof p' expression to silence this warning}}
18   int a4 = sizeof arr2 / sizeof p;
19   int a5 = sizeof(arr) / sizeof(short); // expected-warning {{expression does not compute the number of elements in this array; element type is 'int', not 'short'}}
20   // expected-note@-1 {{place parentheses around the 'sizeof(short)' expression to silence this warning}}
21   int a6 = sizeof(arr) / sizeof(int32);
22   int a7 = sizeof(arr) / sizeof(int);
23   int a9 = sizeof(arr) / sizeof(unsigned int);
24   const char arr3[2] = "A";
25   int a10 = sizeof(arr3) / sizeof(char);
26   int a11 = sizeof(arr2) / (sizeof(unsigned));
27   int a12 = sizeof(arr) / (sizeof(short));
28   int a13 = sizeof(arr3) / sizeof(p);
29   int a14 = sizeof(arr3) / sizeof(int);
30 
31   int arr4[10][12];
32   int b1 = sizeof(arr4) / sizeof(arr2[12]);
33   int b2 = sizeof(arr4) / sizeof(int *);
34   int b3 = sizeof(arr4) / sizeof(short *);
35   int arr5[][5] = {
36       {1, 2, 3, 4, 5},
37       {6, 7, 8, 9, 0},
38   };
39   int c1 = sizeof(arr5) / sizeof(*arr5);
40   int c2 = sizeof(arr5) / sizeof(**arr5);
41   int c3 = sizeof(arr5) / sizeof(int);
42 
43   float m[4][4];
44   int d1 = sizeof(m) / sizeof(**m);
45 
46   int array[10];
47   int narray = sizeof(array) / sizeof(int &);
48   int narray2 = sizeof(array) / sizeof(decltype(array[0]));
49 
50   int *arrptrs[10];                                          // expected-note {{array 'arrptrs' declared here}}
51   int len = sizeof(arrptrs) / sizeof(decltype(*arrptrs[0])); // expected-warning {{expression does not compute the number of elements in this array; element type is 'int *', not 'int'}}
52   // expected-note@-1 {{place parentheses around the 'sizeof(decltype(*arrptrs[0]))' expression to silence this warning}}
53 }
54