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111
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1 /* { dg-do compile } */
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2 /* { dg-options "-O1 -fdump-tree-dom2 -fdump-tree-optimized" } */
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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 extern const char tree_code_type[];
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8 struct tree_common
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9 {
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10 int code;
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11 };
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12 struct tree_decl
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13 {
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14 long pointer_alias_set;
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15 };
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16 union tree_node
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17 {
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18 struct tree_common common;
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19 struct tree_decl decl;
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20 };
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21 long oof (void);
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22 void record_alias_subset (long);
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23 long
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24 blah (decl, set)
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25 tree decl;
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26 long set;
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27 {
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28 decl->decl.pointer_alias_set = oof();
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29 if (tree_code_type[decl->common.code] != 'd')
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30 abort ();
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31 record_alias_subset (decl->decl.pointer_alias_set);
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32 if (set != -1)
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33 set = 0;
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34 return set;
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35 }
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36
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37 /* There should be precisely one reference to pointer_alias_set. If there is
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38 more than one, then the dominator optimizations failed. */
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39 /* { dg-final { scan-tree-dump-times "pointer_alias_set" 1 "dom2"} } */
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40
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41 /* The assignment set = -1 in the ELSE clause of the last IF
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42 statement should be removed by the final cleanup phase. */
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43 /* { dg-final { scan-tree-dump-times "set = -1" 0 "optimized"} } */
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