1 // RUN: %clang_cc1 %s -fsyntax-only -verify -triple=i686-apple-darwin9 2 // expected-no-diagnostics 3 4 #define CHECK_SIZE(kind, name, size) extern int name##1[sizeof(kind name) == size ? 1 : -1]; 5 #define CHECK_ALIGN(kind, name, size) extern int name##2[__alignof(kind name) == size ? 1 : -1]; 6 7 // Zero-width bit-fields 8 struct a {char x; int : 0; char y;}; 9 CHECK_SIZE(struct, a, 5) 10 CHECK_ALIGN(struct, a, 1) 11 12 union b {char x; int : 0; char y;}; 13 CHECK_SIZE(union, b, 1) 14 CHECK_ALIGN(union, b, 1) 15 16 // Unnamed bit-field align 17 struct c {char x; int : 20;}; 18 CHECK_SIZE(struct, c, 4) 19 CHECK_ALIGN(struct, c, 1) 20 21 union d {char x; int : 20;}; 22 CHECK_SIZE(union, d, 3) 23 CHECK_ALIGN(union, d, 1) 24 25 // Bit-field packing 26 struct __attribute__((packed)) e {int x : 4, y : 30, z : 30;}; 27 CHECK_SIZE(struct, e, 8) 28 CHECK_ALIGN(struct, e, 1) 29 30 // Alignment on bit-fields 31 struct f {__attribute((aligned(8))) int x : 30, y : 30, z : 30;}; 32 CHECK_SIZE(struct, f, 24) 33 CHECK_ALIGN(struct, f, 8) 34 35 // Large structure (overflows i32, in bits). 36 struct s0 { 37 char a[0x32100000]; 38 int x:30, y:30; 39 }; 40 41 CHECK_SIZE(struct, s0, 0x32100008) 42 CHECK_ALIGN(struct, s0, 4) 43 44