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 f()50void f() { 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 } 61