1*f4a2713aSLionel Sambuc // RUN: %clang_cc1 %s -fsyntax-only -verify -triple=i686-apple-darwin9 2*f4a2713aSLionel Sambuc // expected-no-diagnostics 3*f4a2713aSLionel Sambuc 4*f4a2713aSLionel Sambuc #define CHECK_SIZE(kind, name, size) extern int name##1[sizeof(kind name) == size ? 1 : -1]; 5*f4a2713aSLionel Sambuc #define CHECK_ALIGN(kind, name, size) extern int name##2[__alignof(kind name) == size ? 1 : -1]; 6*f4a2713aSLionel Sambuc 7*f4a2713aSLionel Sambuc // Zero-width bit-fields 8*f4a2713aSLionel Sambuc struct a {char x; int : 0; char y;}; 9*f4a2713aSLionel Sambuc CHECK_SIZE(struct, a, 5) 10*f4a2713aSLionel Sambuc CHECK_ALIGN(struct, a, 1) 11*f4a2713aSLionel Sambuc 12*f4a2713aSLionel Sambuc union b {char x; int : 0; char y;}; 13*f4a2713aSLionel Sambuc CHECK_SIZE(union, b, 1) 14*f4a2713aSLionel Sambuc CHECK_ALIGN(union, b, 1) 15*f4a2713aSLionel Sambuc 16*f4a2713aSLionel Sambuc // Unnamed bit-field align 17*f4a2713aSLionel Sambuc struct c {char x; int : 20;}; 18*f4a2713aSLionel Sambuc CHECK_SIZE(struct, c, 4) 19*f4a2713aSLionel Sambuc CHECK_ALIGN(struct, c, 1) 20*f4a2713aSLionel Sambuc 21*f4a2713aSLionel Sambuc union d {char x; int : 20;}; 22*f4a2713aSLionel Sambuc CHECK_SIZE(union, d, 3) 23*f4a2713aSLionel Sambuc CHECK_ALIGN(union, d, 1) 24*f4a2713aSLionel Sambuc 25*f4a2713aSLionel Sambuc // Bit-field packing 26*f4a2713aSLionel Sambuc struct __attribute__((packed)) e {int x : 4, y : 30, z : 30;}; 27*f4a2713aSLionel Sambuc CHECK_SIZE(struct, e, 8) 28*f4a2713aSLionel Sambuc CHECK_ALIGN(struct, e, 1) 29*f4a2713aSLionel Sambuc 30*f4a2713aSLionel Sambuc // Alignment on bit-fields 31*f4a2713aSLionel Sambuc struct f {__attribute((aligned(8))) int x : 30, y : 30, z : 30;}; 32*f4a2713aSLionel Sambuc CHECK_SIZE(struct, f, 24) 33*f4a2713aSLionel Sambuc CHECK_ALIGN(struct, f, 8) 34*f4a2713aSLionel Sambuc 35*f4a2713aSLionel Sambuc // Large structure (overflows i32, in bits). 36*f4a2713aSLionel Sambuc struct s0 { 37*f4a2713aSLionel Sambuc char a[0x32100000]; 38*f4a2713aSLionel Sambuc int x:30, y:30; 39*f4a2713aSLionel Sambuc }; 40*f4a2713aSLionel Sambuc 41*f4a2713aSLionel Sambuc CHECK_SIZE(struct, s0, 0x32100008) 42*f4a2713aSLionel Sambuc CHECK_ALIGN(struct, s0, 4) 43*f4a2713aSLionel Sambuc 44