clang/test/Sema/pragma-pack-2.c

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