typedef HSIterator<struct pred_expr *, uintptr_t, 0, model_malloc, model_calloc, model_free, pred_expr_hash, pred_expr_equal> PredExprSetIter;
typedef enum predicate_token {
- EQUALITY, NULLITY
+ NOPREDICATE, EQUALITY, NULLITY
} token_t;
/* If token is EQUALITY, then the predicate asserts whether
* read at memory location specified in predicate_expr.
*/
struct pred_expr {
- pred_expr(token_t token, void * location, bool value) :
+ pred_expr(token_t token, FuncInst * inst, bool value) :
token(token),
- location(location),
+ func_inst(inst),
value(value)
{}
token_t token;
- void * location;
+ FuncInst * func_inst;
bool value;
MEMALLOC
};
+/* Used by predicate generator */
+struct half_pred_expr {
+ half_pred_expr(token_t token, FuncInst * inst) :
+ token(token),
+ func_inst(inst)
+ {}
+
+ token_t token;
+ FuncInst * func_inst;
+
+ SNAPSHOTALLOC
+};
+
class Predicate {
public:
FuncInst * get_func_inst() { return func_inst; }
PredExprSet * get_pred_expressions() { return &pred_expressions; }
- void add_predicate(token_t token, void * location, bool value);
+
+ void add_predicate_expr(token_t token, FuncInst * func_inst, bool value);
void add_child(Predicate * child);
- void add_parent(Predicate * parent);
- void set_backedge(Predicate * back_pred) { backedge = back_pred; }
+ void set_parent(Predicate * parent_pred) { parent = parent_pred; }
+ void add_backedge(Predicate * back_pred) { backedges.add(back_pred); }
+ void copy_predicate_expr(Predicate * other);
ModelVector<Predicate *> * get_children() { return &children; }
- ModelVector<Predicate *> * get_parents() { return &parents; }
- Predicate * get_backedge() { return backedge; }
+ Predicate * get_parent() { return parent; }
+ PredSet * get_backedges() { return &backedges; }
bool is_entry_predicate() { return entry_predicate; }
void set_entry_predicate() { entry_predicate = true; }
private:
FuncInst * func_inst;
bool entry_predicate;
- /* may have multiple predicates */
+
+ /* may have multiple predicate expressions */
PredExprSet pred_expressions;
ModelVector<Predicate *> children;
- ModelVector<Predicate *> parents;
- /* assume almost one back edge exists */
- Predicate * backedge;
+
+ /* only a single parent may exist */
+ Predicate * parent;
+
+ /* may have multiple back edges, e.g. nested loops */
+ PredSet backedges;
};
#endif /* __PREDICATE_H__ */