1 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple=i686-apple-darwin9 2 3 #define CHECK_SIZE(kind, name, size) extern int name##1[sizeof(kind name) == size ? 1 : -1]; 4 #define CHECK_ALIGN(kind, name, size) extern int name##2[__alignof(kind name) == size ? 1 : -1]; 5 6 // Zero-width bit-fields 7 struct a {char x; int : 0; char y;}; 8 CHECK_SIZE(struct, a, 5) 9 CHECK_ALIGN(struct, a, 1) 10 11 union b {char x; int : 0; char y;}; 12 CHECK_SIZE(union, b, 1) 13 CHECK_ALIGN(union, b, 1) 14 15 // Unnamed bit-field align 16 struct c {char x; int : 20;}; 17 CHECK_SIZE(struct, c, 4) 18 CHECK_ALIGN(struct, c, 1) 19 20 union d {char x; int : 20;}; 21 CHECK_SIZE(union, d, 3) 22 CHECK_ALIGN(union, d, 1) 23 24 // Bit-field packing 25 struct __attribute__((packed)) e {int x : 4, y : 30, z : 30;}; 26 CHECK_SIZE(struct, e, 8) 27 CHECK_ALIGN(struct, e, 1) 28 29 // Alignment on bit-fields 30 struct f {__attribute((aligned(8))) int x : 30, y : 30, z : 30;}; 31 CHECK_SIZE(struct, f, 24) 32 CHECK_ALIGN(struct, f, 8) 33 34 // Large structure (overflows i32, in bits). 35 struct s0 { 36 char a[0x32100000]; 37 int x:30, y:30; 38 }; 39 40 CHECK_SIZE(struct, s0, 0x32100008) 41 CHECK_ALIGN(struct, s0, 4) 42 43