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111
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1 /* { dg-do compile } */
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2 /* { dg-options "-O1 -fno-tree-fre -fdump-tree-dom2" } */
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3
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4 extern void abort (void);
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5 union tree_node;
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6 typedef union tree_node *tree;
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7 enum tree_code
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8 {
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9 LAST_AND_UNUSED_TREE_CODE
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10 };
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11 extern const char tree_code_type[];
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12 struct tree_common
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13 {
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14 enum tree_code code:8;
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15 };
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16 struct tree_type
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17 {
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18 struct tree_common common;
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19 double alias_set;
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20 };
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21 union tree_node
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22 {
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23 struct tree_common common;
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24 struct tree_type type;
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25 };
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26 long
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27 foo (t, set)
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28 tree t;
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29 double set;
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30 {
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31 if (tree_code_type[t->common.code] != 't')
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32 abort ();
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33
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34 t->type.alias_set = set;
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35
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36 if (t->common.code == 42)
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37 return 1;
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38 else
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39 return 0;
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40 }
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41 /* There should be precisely one load of common.code. If there is
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42 more than one, then the dominator optimizations failed. */
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43 /* { dg-final { scan-tree-dump-times "common.code" 1 "dom2" } } */
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