#include "type.h"
#include "entity.h"
#include "typewalk.h"
+#include "irgraph_t.h"
#include "irprog_t.h"
#include "pset.h"
#include "set.h"
#include "mangle.h"
+#include "irgwalk.h"
+#include "irflag.h"
//#include ".h"
return pset_next(get_type_map(tp, d_down));
}
+int is_class_trans_subtype (type *tp, type *subtp) {
+ assert_valid_state();
+ return (pset_find_ptr(get_type_map(tp, d_down), subtp) != NULL);
+}
+
/* - supertype ----------------------------------------------------------- */
type *get_class_trans_supertype_first(type *tp) {
return 0;
}
+int is_superclass_of(type *high, type *low) {
+ return is_subclass_of(low, high);
+}
+
int is_overwritten_by(entity *high, entity *low) {
int i, n_overwrittenby;
assert(is_entity(low) && is_entity(high));
return res;
}
+
+
+
+/* ----------------------------------------------------------------------- */
+/* Class cast state handling. */
+/* ----------------------------------------------------------------------- */
+
+/* - State handling. ----------------------------------------- */
+
+void set_irg_class_cast_state(ir_graph *irg, ir_class_cast_state s) {
+ if (get_irp_class_cast_state() > s) set_irp_class_cast_state(s);
+ irg->class_cast_state = s;
+}
+
+ir_class_cast_state get_irg_class_cast_state(ir_graph *irg) {
+ return irg->class_cast_state;
+}
+
+void set_irp_class_cast_state(ir_class_cast_state s) {
+ int i;
+ for (i = 0; i < get_irp_n_irgs(); ++i)
+ assert(get_irg_class_cast_state(get_irp_irg(i)) >= s);
+ irp->class_cast_state = s;
+}
+
+ir_class_cast_state get_irp_class_cast_state(void) {
+ return irp->class_cast_state;
+}
+
+char *get_class_cast_state_string(ir_class_cast_state s) {
+#define X(a) case a: return #a
+ switch(s) {
+ X(ir_class_casts_any);
+ X(ir_class_casts_transitive);
+ X(ir_class_casts_normalized);
+ X(ir_class_casts_state_max);
+ default: return "invalid class cast state";
+ }
+#undef X
+}
+
+/* - State verification. ------------------------------------- */
+
+typedef struct ccs_env {
+ ir_class_cast_state expected_state;
+ ir_class_cast_state worst_situation;
+} ccs_env;
+
+void verify_irn_class_cast_state(ir_node *n, void *env) {
+ ccs_env *ccs = (ccs_env *)env;
+ ir_class_cast_state this_state = ir_class_casts_any;
+
+ type *fromtype = get_irn_typeinfo_type(get_Cast_op(n));
+ type *totype = get_Cast_type(n);
+ int ref_depth = 0;
+
+ while (is_Pointer_type(totype) && is_Pointer_type(fromtype)) {
+ totype = get_pointer_points_to_type(totype);
+ fromtype = get_pointer_points_to_type(fromtype);
+ ref_depth++;
+ }
+
+ if (!is_Class_type(totype)) return;
+
+ if (is_subclass_of(totype, fromtype) ||
+ is_subclass_of(fromtype, totype) ) {
+ this_state = ir_class_casts_transitive;
+ if ((get_class_supertype_index(totype, fromtype) == -1) &&
+ (get_class_supertype_index(fromtype, totype) == -1) ) {
+ this_state = ir_class_casts_normalized;
+ }
+ }
+
+ assert(this_state >= ccs->expected_state &&
+ "invalid state class cast state setting in graph");
+
+ if (this_state < ccs->worst_situation)
+ ccs->worst_situation = this_state;
+}
+
+
+/** Verify that the graph meets reqirements of state set. */
+void verify_irg_class_cast_state(ir_graph *irg) {
+ ccs_env env;
+
+ env.expected_state = get_irg_class_cast_state(irg);
+ env.worst_situation = ir_class_casts_normalized;
+
+ irg_walk_graph(irg, NULL, verify_irn_class_cast_state, &env);
+
+ if ((env.worst_situation > env.expected_state) && get_firm_verbosity()) {
+ printf("Note: class cast state is set lower than reqired in graph\n ");
+ DDMG(irg);
+ printf(" state is %s, reqired is %s\n",
+ get_class_cast_state_string(env.expected_state),
+ get_class_cast_state_string(env.worst_situation));
+ }
+}
#define _TR_INHERITANCE_H_
#include "type.h"
-/* #include "entity.h" */
+/*#include "entity.h"*/
#include "ident.h"
+
+/* to resolve recursion between entity.h and irgraph.h */
+#ifndef _IR_GRAPH_TYPEDEF_
+#define _IR_GRAPH_TYPEDEF_
+typedef struct ir_graph ir_graph;
+#endif
+
/* ----------------------------------------------------------------------- */
/* Classify pairs of types/entities in the inheritance relations. */
/* ----------------------------------------------------------------------- */
* subclasses of high. */
int is_subclass_of(type *low, type *high);
+/** Returns true if high is superclass of low.
+ *
+ * Low is a subclass of high if low == high or if low is a subclass of
+ * a subclass of high. I.e, we search in all subtypes of high for low.
+ * @@@ this can be implemented more efficient if we know the set of all
+ * subclasses of high. */
+int is_superclass_of(type *high, type *low);
+
/** Returns true if high is (transitive) overwritten by low.
*
* Returns false if high == low. */
/** Resolve polymorphy in the inheritance relation.
*
- * Returns the dynamically referenced entity if the static entity and the
- * dynamic type are given.
- * Searches downwards in overwritten tree. */
+ * Returns the dynamically referenced entity if the static entity and the
+ * dynamic type are given.
+ * Searches downwards in overwritten tree. */
entity *resolve_ent_polymorphy(type *dynamic_class, entity* static_ent);
/* ----------------------------------------------------------------------- */
inh_transitive_closure_max /**< Invalid value. */
} inh_transitive_closure_state;
-void set_irp_inh_transitive_closure_state(inh_transitive_closure_state s);
-void invalidate_irp_inh_transitive_closure_state(void);
+void set_irp_inh_transitive_closure_state(inh_transitive_closure_state s);
+void invalidate_irp_inh_transitive_closure_state(void);
inh_transitive_closure_state get_irp_inh_transitive_closure_state(void);
/** Iterate over all transitive subtypes. */
type *get_class_trans_subtype_first(type *tp);
type *get_class_trans_subtype_next (type *tp);
+int is_class_trans_subtype (type *tp, type *subtp);
/* - supertype ----------------------------------------------------------- */
entity *get_entity_trans_overwrites_first(entity *ent);
entity *get_entity_trans_overwrites_next (entity *ent);
+
+/* ----------------------------------------------------------------------- */
+/** The state of Cast operations that cast class types or pointers to class
+ * types.
+ *
+ * The state expresses, how far Cast operations conform with the class
+ * hierarchy.
+ *
+ * class A {}
+ * class B1 extends A {}
+ * class B2 extends A {}
+ * class C extends B1 {}
+ * normalized: Cast operations conform with the inheritance relation.
+ * I.e., the type of the operand of a Cast is either a super= or a sub-
+ * type of the type casted to. Example: (A)((B2) (new C())).
+ * transitive: Cast operations conform with the transitive inheritance
+ * relation. Example: (A)(new C()).
+ * any: Cast operations do not conform with the transitive inheritance
+ * relation. Example: (B2)(new B1())
+ *
+ * @see: tropt.h
+ */
+/* ----------------------------------------------------------------------- */
+
+/** Flags for class cast state.
+ *
+ * The state in irp is allways smaller or equal to the state of any
+ * irg.
+ *
+ * We rely on the ordering of the enum. */
+typedef enum {
+ ir_class_casts_any = 0, /**< There are class casts that do not cast in conformance with
+ the class hierarchy. @@@ So far this does not happen in Firm. */
+ ir_class_casts_transitive = 1, /**< Class casts conform to transitive inheritance edges. Default. */
+ ir_class_casts_normalized = 2, /**< Class casts conform to inheritance edges. */
+ ir_class_casts_state_max,
+} ir_class_cast_state;
+char *get_class_cast_state_string(ir_class_cast_state s);
+
+void set_irg_class_cast_state(ir_graph *irg, ir_class_cast_state s);
+ir_class_cast_state get_irg_class_cast_state(ir_graph *irg);
+void set_irp_class_cast_state(ir_class_cast_state s);
+ir_class_cast_state get_irp_class_cast_state(void);
+
+/** Verify the class cast state of an irg.
+ *
+ * Asserts if state is to high, outputs warning if state is to low
+ * and firm verbosity is set.
+ */
+void verify_irg_class_cast_state(ir_graph *irg);
#endif /* _TR_INHERITANCE_H_ */
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