xref: /aosp_15_r20/external/clang/test/Sema/pragma-pack-2.c (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // RUN: %clang_cc1 -triple i686-apple-darwin9 %s -fsyntax-only -verify
2*67e74705SXin Li // expected-no-diagnostics
3*67e74705SXin Li 
4*67e74705SXin Li #include <stddef.h>
5*67e74705SXin Li 
6*67e74705SXin Li #pragma pack(4)
7*67e74705SXin Li 
8*67e74705SXin Li // Baseline
9*67e74705SXin Li struct s0 {
10*67e74705SXin Li   char f0;
11*67e74705SXin Li   int  f1;
12*67e74705SXin Li };
13*67e74705SXin Li extern int a0[offsetof(struct s0, f1) == 4 ? 1 : -1];
14*67e74705SXin Li 
15*67e74705SXin Li #pragma pack(push, 2)
16*67e74705SXin Li struct s1 {
17*67e74705SXin Li   char f0;
18*67e74705SXin Li   int  f1;
19*67e74705SXin Li };
20*67e74705SXin Li extern int a1[offsetof(struct s1, f1) == 2 ? 1 : -1];
21*67e74705SXin Li #pragma pack(pop)
22*67e74705SXin Li 
23*67e74705SXin Li #pragma pack(1)
24*67e74705SXin Li struct s3_0 {
25*67e74705SXin Li   char f0;
26*67e74705SXin Li   int f1;
27*67e74705SXin Li };
28*67e74705SXin Li #pragma pack()
29*67e74705SXin Li struct s3_1 {
30*67e74705SXin Li   char f0;
31*67e74705SXin Li   int f1;
32*67e74705SXin Li };
33*67e74705SXin Li extern int a3_0[offsetof(struct s3_0, f1) == 1 ? 1 : -1];
34*67e74705SXin Li extern int a3_1[offsetof(struct s3_1, f1) == 4 ? 1 : -1];
35*67e74705SXin Li 
36*67e74705SXin Li // pack(0) is like pack()
37*67e74705SXin Li #pragma pack(1)
38*67e74705SXin Li struct s4_0 {
39*67e74705SXin Li   char f0;
40*67e74705SXin Li   int f1;
41*67e74705SXin Li };
42*67e74705SXin Li #pragma pack(0)
43*67e74705SXin Li struct s4_1 {
44*67e74705SXin Li   char f0;
45*67e74705SXin Li   int f1;
46*67e74705SXin Li };
47*67e74705SXin Li extern int a4_0[offsetof(struct s4_0, f1) == 1 ? 1 : -1];
48*67e74705SXin Li extern int a4_1[offsetof(struct s4_1, f1) == 4 ? 1 : -1];
49*67e74705SXin Li 
f()50*67e74705SXin Li void f() {
51*67e74705SXin Li   #pragma pack(push, 2)
52*67e74705SXin Li   struct s5_0 {
53*67e74705SXin Li     char f0;
54*67e74705SXin Li     struct s2_4_0 {
55*67e74705SXin Li       int f0;
56*67e74705SXin Li     } f1;
57*67e74705SXin Li   };
58*67e74705SXin Li   #pragma pack(pop)
59*67e74705SXin Li   extern int s5_0[offsetof(struct s5_0, f1) == 2 ? 1 : -1];
60*67e74705SXin Li }
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