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;
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 {
50 int x;
51 int y;
52 } __attribute__((packed));
53
54 struct S10 {
55 int x;
56 char a,b,c,d;
57 } __attribute__((packed));
58
59
60 struct S11 { // expected-warning {{packed attribute is unnecessary for '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 struct S14 { // expected-warning {{packed attribute is unnecessary for 'S14'}}
76 char a,b,c,d;
77 } __attribute__((packed));
78
79 struct S15 { // expected-warning {{packed attribute is unnecessary for 'S15'}}
80 struct S14 s;
81 char a;
82 } __attribute__((packed));
83
84 struct S16 { // expected-warning {{padding size of 'S16' with 2 bytes to alignment boundary}} expected-warning {{packed attribute is unnecessary for 'S16'}}
85 char a,b;
86 } __attribute__((packed, aligned(4)));
87
88 struct S17 {
89 struct S16 s;
90 char a,b;
91 } __attribute__((packed, aligned(2)));
92
93 struct S18 { // expected-warning {{padding size of 'S18' with 2 bytes to alignment boundary}} expected-warning {{packed attribute is unnecessary for 'S18'}}
94 struct S16 s;
95 char a,b;
96 } __attribute__((packed, aligned(4)));
97
98 struct S19 { // expected-warning {{packed attribute is unnecessary for 'S19'}}
99 bool b;
100 char a;
101 } __attribute__((packed, aligned(1)));
102
103 struct S20 {
104 int i;
105 char a;
106 } __attribute__((packed, aligned(1)));
107
108 struct S21 { // expected-warning {{padding size of 'S21' with 4 bits to alignment boundary}}
109 unsigned char a : 6;
110 unsigned char b : 6;
111 } __attribute__((packed, aligned(1)));
112
113 struct S22 { // expected-warning {{packed attribute is unnecessary for 'S22'}}
114 unsigned char a : 4;
115 unsigned char b : 4;
116 } __attribute__((packed));
117
118 struct S23 { // expected-warning {{padding size of 'S23' with 4 bits to alignment boundary}} expected-warning {{packed attribute is unnecessary for 'S23'}}
119 unsigned char a : 2;
120 unsigned char b : 2;
121 } __attribute__((packed));
122
123 struct S24 {
124 unsigned char a : 6;
125 unsigned char b : 6;
126 unsigned char c : 6;
127 unsigned char d : 6;
128 unsigned char e : 6;
129 unsigned char f : 6;
130 unsigned char g : 6;
131 unsigned char h : 6;
132 } __attribute__((packed));
133
134 struct S25 { // expected-warning {{padding size of 'S25' with 7 bits to alignment boundary}} expected-warning {{packed attribute is unnecessary for 'S25'}}
135 unsigned char a;
136 unsigned char b : 1;
137 } __attribute__((packed));
138
139 struct S26 { // expected-warning {{packed attribute is unnecessary for 'S26'}}
140 unsigned char a : 1;
141 unsigned char b; //expected-warning {{padding struct 'S26' with 7 bits to align 'b'}}
142 } __attribute__((packed));
143
144 struct S27 { // expected-warning {{padding size of 'S27' with 7 bits to alignment boundary}}
145 unsigned char a : 1;
146 unsigned char b : 8;
147 } __attribute__((packed));
148
149
150 // 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 *,S14 *,S15 *,S16 *,S17 *,S18 *,S19 *,S20 *,S21 *,S22 *,S23 *,S24 *,S25 *,S26 *,S27 *)151 void f(S1*, S2*, S3*, S4*, S5*, S6*, S7*, S8*, S9*, S10*, S11*, S12*, S13*,
152 S14*, S15*, S16*, S17*, S18*, S19*, S20*, S21*, S22*, S23*, S24*, S25*,
153 S26*, S27*){}
154