1 // RUN: %clang_cc1 -std=c++11 -triple i386-apple-darwin9 -fsyntax-only -verify %s 2 3 using size_t = decltype(sizeof(0)); 4 5 struct complex_double { 6 double real; 7 double imag; 8 }; 9 10 template <typename T, size_t ABI, size_t Preferred> 11 struct check_alignment { 12 using type = T; 13 static type value; 14 15 static_assert(__alignof__(value) == Preferred, "__alignof__(value) != Preferred"); 16 static_assert(__alignof__(type) == Preferred, "__alignof__(type) != Preferred"); 17 static_assert(alignof(type) == ABI, "alignof(type) != ABI"); 18 }; 19 20 // PR3433 21 template struct check_alignment<double, 4, 8>; 22 template struct check_alignment<long long, 4, 8>; 23 template struct check_alignment<unsigned long long, 4, 8>; 24 template struct check_alignment<complex_double, 4, 4>; 25 26 // PR6362 27 struct __attribute__((packed)) 28 packed_struct { 29 unsigned int a; 30 } g_packedstruct; 31 template struct check_alignment<packed_struct, 1, 1>; 32 static_assert(__alignof__(g_packedstruct.a) == 1, "__alignof__(packed_struct.member) != 1"); 33 34 template struct check_alignment<double[3], 4, 8>; 35 36 enum big_enum { x = 18446744073709551615ULL }; 37 template struct check_alignment<big_enum, 4, 8>; 38 39 // PR5637 40 41 #define ALIGNED(x) __attribute__((aligned(x))) 42 43 typedef ALIGNED(2) struct { 44 char a[3]; 45 } aligned_before_struct; 46 47 static_assert(sizeof(aligned_before_struct) == 3, ""); 48 static_assert(sizeof(aligned_before_struct[1]) == 4, ""); // expected-error {{size of array element}} 49 static_assert(sizeof(aligned_before_struct[2]) == 6, ""); // expected-error {{size of array element}} 50 static_assert(sizeof(aligned_before_struct[2][1]) == 8, ""); // expected-error {{size of array element}} 51 static_assert(sizeof(aligned_before_struct[1][2]) == 6, ""); // expected-error {{size of array element}} 52 53 typedef struct ALIGNED(2) { 54 char a[3]; 55 } aligned_after_struct; 56 57 static_assert(sizeof(aligned_after_struct) == 4, ""); 58 static_assert(sizeof(aligned_after_struct[1]) == 4, ""); 59 static_assert(sizeof(aligned_after_struct[2]) == 8, ""); 60 static_assert(sizeof(aligned_after_struct[2][1]) == 8, ""); 61 static_assert(sizeof(aligned_after_struct[1][2]) == 8, ""); 62