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111
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1 /* Test C11 alignment support. Test valid code using stdalign.h. */
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2 /* { dg-do run } */
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3 /* { dg-options "-std=c11 -pedantic-errors" } */
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4
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5 #include <stdalign.h>
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6 #include <stddef.h>
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7
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8 extern int strcmp (const char *, const char *);
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9
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10 extern void exit (int);
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11 extern void abort (void);
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12
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13 alignas (alignof (max_align_t)) char c;
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14 extern alignas (max_align_t) char c;
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15 extern char c;
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16
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17 extern alignas (max_align_t) short s;
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18 alignas (max_align_t) short s;
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19
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20 alignas (int) int i;
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21 extern int i;
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22
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23 alignas (max_align_t) long l;
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24
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25 alignas (max_align_t) long long ll;
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26
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27 alignas (max_align_t) float f;
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28
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29 alignas (max_align_t) double d;
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30
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31 alignas (max_align_t) _Complex long double cld;
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32
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33 alignas (0) alignas (int) alignas (char) char ca[10];
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34
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35 alignas ((int) alignof (max_align_t) + 0) int x;
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36
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37 enum e { E = alignof (max_align_t) };
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38 alignas (E) int y;
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39
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40 void
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41 func (void)
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42 {
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43 alignas (max_align_t) long long auto_ll;
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44 }
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45
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46 /* Valid, but useless. */
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47 alignas (0) struct s; /* { dg-warning "useless" } */
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48
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49 #ifndef alignas
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50 #error "alignas not defined"
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51 #endif
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52
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53 #ifndef alignof
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54 #error "alignof not defined"
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55 #endif
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56
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57 #ifndef __alignas_is_defined
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58 #error "__alignas_is_defined not defined"
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59 #endif
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60
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61 #if __alignas_is_defined != 1
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62 #error "__alignas_is_defined not 1"
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63 #endif
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64
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65 #ifndef __alignof_is_defined
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66 #error "__alignof_is_defined not defined"
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67 #endif
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68
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69 #if __alignof_is_defined != 1
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70 #error "__alignof_is_defined not 1"
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71 #endif
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72
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73 #define str(x) #x
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74 #define xstr(x) str(x)
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75
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76 const char *s1 = xstr(alignas);
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77 const char *s2 = xstr(alignof);
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78 const char *s3 = xstr(__alignas_is_defined);
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79 const char *s4 = xstr(__alignof_is_defined);
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80
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81 int
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82 main (void)
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83 {
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84 if (strcmp (s1, "_Alignas") != 0)
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85 abort ();
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86 if (strcmp (s2, "_Alignof") != 0)
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87 abort ();
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88 if (strcmp (s3, "1") != 0)
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89 abort ();
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90 if (strcmp (s4, "1") != 0)
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91 abort ();
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92 }
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