55 lines
1.0 KiB
C
55 lines
1.0 KiB
C
/* { dg-do compile } */
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/* { dg-options "-O1 -fdump-tree-dom2" } */
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extern void abort (void);
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union tree_node;
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typedef union tree_node *tree;
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enum tree_code
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{
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SET_TYPE,
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RECORD_TYPE,
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LAST_AND_UNUSED_TREE_CODE
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};
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extern const char tree_code_type[];
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struct tree_common
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{
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enum tree_code code:8;
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};
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union tree_node
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{
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struct tree_common common;
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};
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readonly_fields_p (type)
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tree type;
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{
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if (type->common.code != RECORD_TYPE)
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return;
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if (tree_code_type[type->common.code] != 't')
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abort ();
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return;
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}
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/* A good optimizer would realize that the cast to (unsigned int) is
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useless as the earlier cast of the same value of (unsigned char) will
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always produce the same result. */
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/* { dg-final { scan-tree-dump-times "\\(unsigned int\\)" 0 "dom2"} } */
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/* There should be one load of ->common.code. We currently fail this
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because we load from ->common.code using different types. */
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/* { dg-final { scan-tree-dump-times "common\.code" 1 "dom2"} } */
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/* { dg-final { cleanup-tree-dump "dom2" } } */
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