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131
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1 // Bug c++/83871 - wrong code due to attributes on distinct template
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2 // specializations
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3 // Test to verify that an explicit template specifialization does not
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4 // "inherit" attributes always_inline or noinline from a primary template
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5 // declared with either. Unlike attr-noinline.C, this test enables
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6 // optimization to verify that noinline prevents inlining.
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7 // { dg-do compile }
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8 // { dg-options "-O2 -Wall -fdump-tree-optimized" }
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9
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10 enum Special { };
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11
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12 int global;
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13
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14 template <class T>
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15 inline void __attribute__ ((always_inline))
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16 falways_inline_noinline ()
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17 {
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18 // Create a side-effect that's unique to this function.
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19 global = __LINE__;
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20 }
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21
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22 template <>
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23 void __attribute__ ((noinline))
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24 falways_inline_noinline<Special>()
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25 {
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26 global = __LINE__;
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27 }
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28
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29 // Verify that a call to the primary is inlined but one to
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30 // the explicit specialization is not.
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31
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32 void test_elim_primary_1 (void)
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33 {
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34 // Should be inlined.
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35 falways_inline_noinline<void>();
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36 // { dg-final { scan-tree-dump-not "falways_inline_noinline<void> *\\(\\)" "optimized" } }
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37 }
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38
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39 void test_keep_special_1 (void)
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40 {
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41 // Should not be inlined.
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42 falways_inline_noinline<Special>();
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43 // { dg-final { scan-tree-dump-times "falways_inline_noinline<Special> *\\(\\);" 1 "optimized" } }
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44 }
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45
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46
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47 template <class T>
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48 void __attribute__ ((noinline))
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49 fnoinline_always_inline ()
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50 {
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51 global = __LINE__;
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52 }
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53
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54 template <>
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55 inline void __attribute__ ((always_inline))
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56 fnoinline_always_inline<Special>() // { dg-bogus "follows declaration" }
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57 {
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58 global = __LINE__;
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59 }
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60
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61 void test_keep_primary_2 (void)
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62 {
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63 // Should not be inlined.
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64 fnoinline_always_inline<void>();
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65 // { dg-final { scan-tree-dump-times "fnoinline_always_inline<void> *\\(\\);" 1 "optimized" } }
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66 }
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67
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68 void test_elim_special_2 (void)
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69 {
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70 // Should be inlined.
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71 fnoinline_always_inline<Special>();
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72 // { dg-final { scan-tree-dump-not "fnoinline_always_inline<Special> *\\(\\);" "optimized" } }
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73 }
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