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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
{
LAST_AND_UNUSED_TREE_CODE
};
extern const char tree_code_type[];
struct tree_common
{
enum tree_code code:8;
};
struct tree_type
{
double alias_set;
};
union tree_node
{
struct tree_common common;
struct tree_type type;
};
long
foo (t, set)
tree t;
double set;
{
if (tree_code_type[t->common.code] != 't')
abort ();
t->type.alias_set = set;
if (t->common.code == 42)
return 1;
else
return 0;
}
/* There should be precisely one load of common.code. If there is
more than one, then the dominator optimizations failed. */
/* ??? Will fail until we properly distinguish member stores. At
present the write to type.alias_set kills the previous load. */
/* { dg-final { scan-tree-dump-times "common.code" 1 "dom2" { xfail *-*-* } } } */
/* { dg-final { cleanup-tree-dump "dom2" } } */
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