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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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