| 1 | // RUN: %clang_cc1 -std=c++11 -triple i386-apple-darwin9 -fsyntax-only -verify %s |
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| 2 | // expected-no-diagnostics |
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| 3 | |
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| 4 | using size_t = decltype(sizeof(0)); |
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| 5 | |
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| 6 | struct complex_double { |
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| 7 | double real; |
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| 8 | double imag; |
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| 9 | }; |
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| 10 | |
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| 11 | template <typename T, size_t ABI, size_t Preferred> |
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| 12 | struct check_alignment { |
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| 13 | using type = T; |
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| 14 | static type value; |
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| 15 | |
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| 16 | static_assert(__alignof__(value) == Preferred, "__alignof__(value) != Preferred"); |
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| 17 | static_assert(__alignof__(type) == Preferred, "__alignof__(type) != Preferred"); |
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| 18 | static_assert(alignof(type) == ABI, "alignof(type) != ABI"); |
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| 19 | }; |
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| 20 | |
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| 21 | // PR3433 |
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| 22 | template struct check_alignment<double, 4, 8>; |
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| 23 | template struct check_alignment<long long, 4, 8>; |
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| 24 | template struct check_alignment<unsigned long long, 4, 8>; |
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| 25 | template struct check_alignment<complex_double, 4, 4>; |
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| 26 | |
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| 27 | // PR6362 |
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| 28 | struct __attribute__((packed)) |
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| 29 | packed_struct { |
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| 30 | unsigned int a; |
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| 31 | } g_packedstruct; |
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| 32 | template struct check_alignment<packed_struct, 1, 1>; |
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| 33 | static_assert(__alignof__(g_packedstruct.a) == 1, "__alignof__(packed_struct.member) != 1"); |
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| 34 | |
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| 35 | template struct check_alignment<double[3], 4, 8>; |
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| 36 | |
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| 37 | enum big_enum { x = 18446744073709551615ULL }; |
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| 38 | template struct check_alignment<big_enum, 4, 8>; |
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| 39 | |
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| 40 | // PR5637 |
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| 41 | |
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| 42 | #define ALIGNED(x) __attribute__((aligned(x))) |
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| 43 | |
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| 44 | typedef ALIGNED(2) struct { |
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| 45 | char a[3]; |
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| 46 | } aligned_before_struct; |
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| 47 | |
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| 48 | static_assert(sizeof(aligned_before_struct) == 3, ""); |
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| 49 | static_assert(sizeof(aligned_before_struct[1]) == 4, ""); |
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| 50 | static_assert(sizeof(aligned_before_struct[2]) == 6, ""); |
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| 51 | static_assert(sizeof(aligned_before_struct[2][1]) == 8, ""); |
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| 52 | static_assert(sizeof(aligned_before_struct[1][2]) == 6, ""); |
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| 53 | |
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| 54 | typedef struct ALIGNED(2) { |
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| 55 | char a[3]; |
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| 56 | } aligned_after_struct; |
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| 57 | |
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| 58 | static_assert(sizeof(aligned_after_struct) == 4, ""); |
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| 59 | static_assert(sizeof(aligned_after_struct[1]) == 4, ""); |
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| 60 | static_assert(sizeof(aligned_after_struct[2]) == 8, ""); |
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| 61 | static_assert(sizeof(aligned_after_struct[2][1]) == 8, ""); |
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| 62 | static_assert(sizeof(aligned_after_struct[1][2]) == 8, ""); |
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| 63 | |
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