1 // RUN: %clang_cc1 -triple=x86_64-none-none -Wpadded -Wpacked -verify %s -emit-llvm-only
2
3 struct S1 {
4 char c;
5 short s; // expected-warning {{padding struct 'S1' with 1 byte to align 's'}}
6 long l; // expected-warning {{padding struct 'S1' with 4 bytes to align 'l'}}
7 };
8
9 struct S2 { // expected-warning {{padding size of 'S2' with 3 bytes to alignment boundary}}
10 int i;
11 char c;
12 };
13
14 struct S3 {
15 char c;
16 int i;
17 } __attribute__((packed));
18
19 struct S4 {
20 int i; // expected-warning {{packed attribute is unnecessary for 'i'}}
21 char c;
22 } __attribute__((packed));
23
24 struct S5 {
25 char c;
26 union {
27 char c;
28 int i;
29 } u; // expected-warning {{padding struct 'S5' with 3 bytes to align 'u'}}
30 };
31
32 struct S6 { // expected-warning {{padding size of 'S6' with 30 bits to alignment boundary}}
33 int i : 2;
34 };
35
36 struct S7 { // expected-warning {{padding size of 'S7' with 7 bytes to alignment boundary}}
37 char c;
38 virtual void m();
39 };
40
41 struct B {
42 char c;
43 };
44
45 struct S8 : B {
46 int i; // expected-warning {{padding struct 'S8' with 3 bytes to align 'i'}}
47 };
48
49 struct S9 { // expected-warning {{packed attribute is unnecessary for 'S9'}}
50 int x; // expected-warning {{packed attribute is unnecessary for 'x'}}
51 int y; // expected-warning {{packed attribute is unnecessary for 'y'}}
52 } __attribute__((packed));
53
54 struct S10 { // expected-warning {{packed attribute is unnecessary for 'S10'}}
55 int x; // expected-warning {{packed attribute is unnecessary for 'x'}}
56 char a,b,c,d;
57 } __attribute__((packed));
58
59
60 struct S11 {
61 bool x;
62 char a,b,c,d;
63 } __attribute__((packed));
64
65 struct S12 {
66 bool b : 1;
67 char c; // expected-warning {{padding struct 'S12' with 7 bits to align 'c'}}
68 };
69
70 struct S13 { // expected-warning {{padding size of 'S13' with 6 bits to alignment boundary}}
71 char c;
72 bool b : 10;
73 };
74
75 // The warnings are emitted when the layout of the structs is computed, so we have to use them.
f(S1 *,S2 *,S3 *,S4 *,S5 *,S6 *,S7 *,S8 *,S9 *,S10 *,S11 *,S12 *,S13 *)76 void f(S1*, S2*, S3*, S4*, S5*, S6*, S7*, S8*, S9*, S10*, S11*, S12*, S13*) { }
77