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gerrit-public.fairphone.software / platform / external / clang / 2bebbf0acee55404de4b8846713b64429e744e8f / . / test / Sema / struct-packed-align.c
blob: 8250c14d442099eba062cda118b68760280b4b6f [file] [log] [blame]
Daniel Dunbard7d5f022009-03-24 02:24:46 +0000[diff] [blame]1// RUN: clang-cc %s -fsyntax-only -verify
Anders Carlsson6a24acb2008-02-16 01:20:23 +0000[diff] [blame]2
Anders Carlsson5a1b0c42008-02-16 19:51:36 +0000[diff] [blame]3// Packed structs.
Anders Carlsson6a24acb2008-02-16 01:20:23 +0000[diff] [blame]4struct s {
5 char a;
6 int b __attribute__((packed));
7 char c;
8 int d;
9};
10
Anders Carlsson5a1b0c42008-02-16 19:51:36 +0000[diff] [blame]11extern int a1[sizeof(struct s) == 12 ? 1 : -1];
12extern int a2[__alignof(struct s) == 4 ? 1 : -1];
13
Anders Carlsson6a24acb2008-02-16 01:20:23 +0000[diff] [blame]14struct __attribute__((packed)) packed_s {
15 char a;
16 int b __attribute__((packed));
17 char c;
18 int d;
19};
20
Anders Carlsson5a1b0c42008-02-16 19:51:36 +0000[diff] [blame]21extern int b1[sizeof(struct packed_s) == 10 ? 1 : -1];
22extern int b2[__alignof(struct packed_s) == 1 ? 1 : -1];
23
Anders Carlsson6a24acb2008-02-16 01:20:23 +0000[diff] [blame]24struct fas {
25 char a;
26 int b[];
27};
28
Anders Carlsson5a1b0c42008-02-16 19:51:36 +0000[diff] [blame]29extern int c1[sizeof(struct fas) == 4 ? 1 : -1];
30extern int c2[__alignof(struct fas) == 4 ? 1 : -1];
31
Anders Carlsson6a24acb2008-02-16 01:20:23 +0000[diff] [blame]32struct __attribute__((packed)) packed_fas {
33 char a;
34 int b[];
35};
36
Anders Carlsson6a24acb2008-02-16 01:20:23 +0000[diff] [blame]37extern int d1[sizeof(struct packed_fas) == 1 ? 1 : -1];
38extern int d2[__alignof(struct packed_fas) == 1 ? 1 : -1];
Anders Carlsson5a1b0c42008-02-16 19:51:36 +0000[diff] [blame]39
40// Alignment
41
42struct __attribute__((aligned(8))) as1 {
43 char c;
44};
45
46extern int e1[sizeof(struct as1) == 8 ? 1 : -1];
47extern int e2[__alignof(struct as1) == 8 ? 1 : -1];
48
Daniel Dunbar7549c552009-02-18 20:06:09 +0000[diff] [blame]49// FIXME: Will need to force arch once max usable alignment isn't hard
50// coded.
51struct __attribute__((aligned)) as1_2 {
52 char c;
53};
54extern int e1_2[sizeof(struct as1_2) == 16 ? 1 : -1];
55extern int e2_2[__alignof(struct as1_2) == 16 ? 1 : -1];
56
Anders Carlsson5a1b0c42008-02-16 19:51:36 +0000[diff] [blame]57struct as2 {
58 char c;
59 int __attribute__((aligned(8))) a;
60};
61
62extern int f1[sizeof(struct as2) == 16 ? 1 : -1];
63extern int f2[__alignof(struct as2) == 8 ? 1 : -1];
64
65struct __attribute__((packed)) as3 {
66 char c;
67 int a;
68 int __attribute__((aligned(8))) b;
69};
70
71extern int g1[sizeof(struct as3) == 16 ? 1 : -1];
72extern int g2[__alignof(struct as3) == 8 ? 1 : -1];
Chris Lattnerabb57582008-05-09 05:34:49 +0000[diff] [blame]73
74
75// rdar://5921025
76struct packedtest {
77 int ted_likes_cheese;
78 void *args[] __attribute__((packed));
79};
Eli Friedman4bd998b2008-05-30 09:31:38 +0000[diff] [blame]80
81// Packed union
82union __attribute__((packed)) au4 {char c; int x;};
83extern int h1[sizeof(union au4) == 4 ? 1 : -1];
84extern int h2[__alignof(union au4) == 1 ? 1 : -1];
85
86// Aligned union
87union au5 {__attribute__((aligned(4))) char c;};
88extern int h1[sizeof(union au5) == 4 ? 1 : -1];
89extern int h2[__alignof(union au5) == 4 ? 1 : -1];
90
91// Alignment+packed
92struct as6 {char c; __attribute__((packed, aligned(2))) int x;};
93extern int i1[sizeof(struct as6) == 6 ? 1 : -1];
94extern int i2[__alignof(struct as6) == 2 ? 1 : -1];
95
96union au6 {char c; __attribute__((packed, aligned(2))) int x;};
97extern int k1[sizeof(union au6) == 4 ? 1 : -1];
98extern int k2[__alignof(union au6) == 2 ? 1 : -1];
99
Daniel Dunbar7d076642008-10-03 17:33:35 +0000[diff] [blame]100// Check postfix attributes
101union au7 {char c; int x;} __attribute__((packed));
102extern int l1[sizeof(union au7) == 4 ? 1 : -1];
103extern int l2[__alignof(union au7) == 1 ? 1 : -1];
104
105struct packed_fas2 {
106 char a;
107 int b[];
108} __attribute__((packed));
109
110extern int m1[sizeof(struct packed_fas2) == 1 ? 1 : -1];
111extern int m2[__alignof(struct packed_fas2) == 1 ? 1 : -1];