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      1 // RUN: %clang_cc1 -triple i686-apple-darwin9 %s -fsyntax-only -verify
      2 
      3 #include <stddef.h>
      4 
      5 #pragma pack(4)
      6 
      7 // Baseline
      8 struct s0 {
      9   char f0;
     10   int  f1;
     11 };
     12 extern int a0[offsetof(struct s0, f1) == 4 ? 1 : -1];
     13 
     14 #pragma pack(push, 2)
     15 struct s1 {
     16   char f0;
     17   int  f1;
     18 };
     19 extern int a1[offsetof(struct s1, f1) == 2 ? 1 : -1];
     20 #pragma pack(pop)
     21 
     22 #pragma pack(1)
     23 struct s3_0 {
     24   char f0;
     25   int f1;
     26 };
     27 #pragma pack()
     28 struct s3_1 {
     29   char f0;
     30   int f1;
     31 };
     32 extern int a3_0[offsetof(struct s3_0, f1) == 1 ? 1 : -1];
     33 extern int a3_1[offsetof(struct s3_1, f1) == 4 ? 1 : -1];
     34 
     35 // pack(0) is like pack()
     36 #pragma pack(1)
     37 struct s4_0 {
     38   char f0;
     39   int f1;
     40 };
     41 #pragma pack(0)
     42 struct s4_1 {
     43   char f0;
     44   int f1;
     45 };
     46 extern int a4_0[offsetof(struct s4_0, f1) == 1 ? 1 : -1];
     47 extern int a4_1[offsetof(struct s4_1, f1) == 4 ? 1 : -1];
     48 
     49 void f() {
     50   #pragma pack(push, 2)
     51   struct s5_0 {
     52     char f0;
     53     struct s2_4_0 {
     54       int f0;
     55     } f1;
     56   };
     57   #pragma pack(pop)
     58   extern int s5_0[offsetof(struct s5_0, f1) == 2 ? 1 : -1];
     59 }
     60