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/* { dg-do compile } */
/* { dg-options "-O1 -fdump-tree-copyprop2" } */
extern void abort (void);
extern void blah (void);
union tree_node;
typedef union tree_node *tree;
struct tree_vec
{
int length;
tree a[1];
};
struct tree_type
{
tree binfo;
};
union tree_node
{
struct tree_type type;
struct tree_vec vec;
};
void
record_component_aliases (type)
tree type;
{
if (type->type.binfo->vec.length)
abort ();
for (; ((
{
const tree __z = type->type.binfo;
if (type->type.binfo->vec.length)
abort ();
type->type.binfo->vec.a[4];}
)->vec.length);)
{
if (4 >= type->type.binfo->vec.length)
abort ();
blah ();
}
}
/* The call to blah should have been eliminated. If the call is not
eliminated, then dominator optimizations failed and it'll be
impossible to delete other unnecessary code. */
/* { dg-final { scan-tree-dump-not "blah \\(\\)" "copyprop2" } } */
/* There should be two IF conditionals. */
/* { dg-final { scan-tree-dump-times "if " 2 "copyprop2"} } */
/* There should be a single load of type.binfo. */
/* { dg-final { scan-tree-dump-times "type\\.binfo" 1 "copyprop2"} } */
/* There should be two loads of vec.length. */
/* { dg-final { scan-tree-dump-times "vec.length" 2 "copyprop2"} } */
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