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145
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1 /* Verify that valid alignment on functions is accepted and results
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2 in the alignment expected for the target and that alignment of
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3 zero is ignored with a warning.
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4 { dg-do compile }
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5 { dg-options "-Wno-pedantic -ftrack-macro-expansion=0" } */
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6
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7 #define ASSERT(expr) _Static_assert (expr, #expr)
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8 #define ALIGN(n) __attribute__ ((aligned (n)))
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9 #define alignof(expr) __alignof__ (expr)
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10 #define HAS_ALIGN(f, n) __builtin_has_attribute (f, __aligned__ (n))
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11
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12 #define MINALIGN(N) ((N) < 4 ? 4 : (N))
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13 #define MAXALIGN 16
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14
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15 /* No alignment specified. */
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16 void f (void) { }
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17
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18 /* Empty alignment means maximum. */
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19 ALIGN () void f_ (void) { }
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20
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21 ALIGN (0) void f0 (void) { } /* { dg-warning "requested alignment .0. is not a positive power of 2" } */
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22 ALIGN (1) void f1 (void) { }
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23 ALIGN (2) void f2 (void) { }
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24 ALIGN (4) void f4 (void) { }
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25 ALIGN (8) void f8 (void) { }
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26 ALIGN (16) void f16 (void) { }
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27 ALIGN (32) void f32 (void) { }
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28
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29 ASSERT (alignof (f_) == MAXALIGN);
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30 ASSERT (alignof (f0) == alignof (f));
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31 ASSERT (alignof (f1) == MINALIGN (1));
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32 ASSERT (alignof (f2) == MINALIGN (2));
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33 ASSERT (alignof (f4) == MINALIGN (4));
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34 ASSERT (alignof (f8) == MINALIGN (8));
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35 ASSERT (alignof (f16) == MINALIGN (16));
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36 ASSERT (alignof (f32) == MINALIGN (32));
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37
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38 ASSERT (!__builtin_has_attribute (f, aligned));
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39 ASSERT (__builtin_has_attribute (f_, aligned));
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40 ASSERT (!__builtin_has_attribute (f0, aligned));
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41
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42 ASSERT (!HAS_ALIGN (f_, MAXALIGN));
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43
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44 ASSERT (HAS_ALIGN (f1, 1));
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45 ASSERT (!HAS_ALIGN (f1, 2));
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46
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47 ASSERT (!HAS_ALIGN (f2, 1));
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48 ASSERT (HAS_ALIGN (f2, 2));
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49 ASSERT (!HAS_ALIGN (f2, 4));
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50
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51 ASSERT (!HAS_ALIGN (f4, 2));
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52 ASSERT (HAS_ALIGN (f4, 4));
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53 ASSERT (!HAS_ALIGN (f4, 8));
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54
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55 ASSERT (!HAS_ALIGN (f8, 4));
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56 ASSERT (HAS_ALIGN (f8, 8));
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57 ASSERT (!HAS_ALIGN (f8, 16));
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58
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59 ASSERT (!HAS_ALIGN (f16, 8));
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60 ASSERT (HAS_ALIGN (f16, 16));
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61 ASSERT (!HAS_ALIGN (f16, 32));
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62
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63 ASSERT (!HAS_ALIGN (f32, 16));
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64 ASSERT (HAS_ALIGN (f32, 32));
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65 ASSERT (!HAS_ALIGN (f32, 64));
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