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. |
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 | |