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/* { dg-do compile } */
/* { dg-options "-O -fdump-tree-dce3" } */
struct rtx_def;
typedef struct rtx_def *rtx;
union tree_node;
typedef union tree_node *tree;
typedef struct mem_attrs
{
int foo;
} mem_attrs;
union rtunion_def
{
mem_attrs *rtmem;
};
typedef union rtunion_def rtunion;
struct rtx_def
{
rtunion fld[1];
};
struct tree_decl
{
rtx rtl;
};
union tree_node
{
struct tree_decl decl;
};
int make_decl_rtl (tree, int);
void *
get_alias_set (t, t1)
tree t;
void *t1;
{
long set;
if (t->decl.rtl)
return (t->decl.rtl->fld[1].rtmem
? 0
: (((t->decl.rtl ? t->decl.rtl: (make_decl_rtl (t, 0), t->decl.rtl)))->fld[1]).rtmem);
return t1;
}
/* There should be precisely one load of ->decl.rtl. If there is
more than, then the dominator optimizations failed. */
/* { dg-final { scan-tree-dump-times "->decl\\.rtl" 1 "dce3"} } */
/* There should be no loads of .rtmem since the complex return statement
is just "return 0". */
/* { dg-final { scan-tree-dump-times ".rtmem" 0 "dce3"} } */
/* There should be one IF statement (the complex return statement should
collapse down to a simple return 0 without any conditionals). */
/* { dg-final { scan-tree-dump-times "if " 1 "dce3"} } */
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