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