-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Author: Goetz Lindenmaier
-**
-** traverse the type information. The walker walks the whole ir graph
-** to find the distinct type trees in the type graph forest.
-** - execute the pre function before recursion
-** - execute the post function after recursion
-*/
-
-#include "stdio.h"
-#include "irgwalk.h"
-#include "irgraph.h"
-#include "irnode.h"
-#include "type_or_entity.h"
+/*
+ * This file is part of libFirm.
+ * Copyright (C) 2012 University of Karlsruhe.
+ */
+
+/**
+ * @file
+ * @brief Functionality to modify the type graph.
+ * @author Goetz Lindenmaier
+ * @brief
+ *
+ * Traverse the type information. The walker walks the whole ir graph
+ * to find the distinct type trees in the type graph forest.
+ * - execute the pre function before recursion
+ * - execute the post function after recursion
+ */
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
-/* Make types visible to allow most efficient access */
-# include "entity_t.h"
+#include "entity_t.h"
+#include "type_t.h"
+#include "irprog_t.h"
+#include "irgraph_t.h"
+#include "irnode_t.h"
+#include "irgwalk.h"
+#include "error.h"
+#include "ircons.h"
+
+/**
+ * The walker environment
+ */
typedef struct type_walk_env {
- void *pre;
- void *post;
- void *env;
+ type_walk_func *pre; /**< Pre-walker function */
+ type_walk_func *post; /**< Post-walker function */
+ void *env; /**< environment for walker functions */
} type_walk_env;
+/* a walker for irn's */
+static void irn_type_walker(
+ ir_node *node, type_walk_func *pre, type_walk_func *post, void *env);
-void type_walk_2(type_or_ent *tore,
- void (pre)(type_or_ent*, void*), void (post)(type_or_ent*, void*),
- void *env)
+static void walk_initializer(ir_initializer_t *initializer,
+ type_walk_func *pre, type_walk_func *post,
+ void *env)
{
- int i, visited = 0;
-
- /* marked? */
- switch (get_kind(tore)) {
- case k_entity:
- if (((entity *)tore)->visit >= type_visited) visited = 1; break;
- case k_type_class:
- if (((type_class *)tore)->visit >= type_visited) visited = 1; break;
- case k_type_strct:
- if (((type_strct *)tore)->visit >= type_visited) visited = 1; break;
- case k_type_method:
- if (((type_method *)tore)->visit >= type_visited) visited = 1; break;
- case k_type_union:
- if (((type_union *)tore)->visit >= type_visited) visited = 1; break;
- case k_type_array:
- if (((type_array *)tore)->visit >= type_visited) visited = 1; break;
- case k_type_enumeration:
- if (((type_enumeration *)tore)->visit >= type_visited) visited = 1; break;
- case k_type_pointer:
- if (((type_pointer *)tore)->visit >= type_visited) visited = 1; break;
- case k_type_primitive:
- if (((type_primitive *)tore)->visit >= type_visited) visited = 1; break;
- default:
- break;
- }
-
- if (!visited) { /* not marked. */
-
- /* execute pre method */
- if(pre)
- pre(tore, env);
-
- /* iterate */
- switch (get_kind(tore)) {
- case k_entity:
- {
- entity *ent = (entity *)tore;
- ent->visit = type_visited;
- type_walk_2((type_or_ent *)get_entity_owner(ent), pre, post, env);
- type_walk_2((type_or_ent *)get_entity_type(ent), pre, post, env);
- }
- break;
- case k_type_class:
- ((type_class *)tore)->visit = type_visited;
- /* !!!!! */
- break;
- case k_type_strct:
- ((type_strct *)tore)->visit = type_visited;
- /* !!!!! */
- break;
- case k_type_method:
- {
- type_method *meth = (type_method *)tore;
- meth->visit = type_visited;
- for (i = 0; i < get_method_arity(meth); i++)
- type_walk_2((type_or_ent *)get_method_param_type(meth, i), pre, post, env);
- for (i = 0; i < get_method_n_res(meth); i++)
- type_walk_2((type_or_ent *)get_method_res_type(meth, i), pre, post, env);
- }
- break;
- case k_type_union:
- ((type_union *)tore)->visit = type_visited;
- break;
- case k_type_array:
- ((type_array *)tore)->visit = type_visited;
- type_walk_2((type_or_ent *)get_array_element_type((type_array *)tore),
- pre, post, env);
- break;
- case k_type_enumeration:
- ((type_enumeration *)tore)->visit = type_visited;
- /* a leave */
- break;
- case k_type_pointer:
- ((type_pointer *)tore)->visit = type_visited;
- type_walk_2((type_or_ent *)get_pointer_points_to_type((type_pointer *)tore),
- pre, post, env);
- break;
- case k_type_primitive:
- ((type_primitive *)tore)->visit = type_visited;
- /* a leave. */
- break;
- default:
- break;
- }
-
- /* execute post method */
- if(post)
- post(tore, env);
- }
-
- return;
+ switch (initializer->kind) {
+ case IR_INITIALIZER_CONST:
+ irn_type_walker(initializer->consti.value, pre, post, env);
+ return;
+ case IR_INITIALIZER_TARVAL:
+ case IR_INITIALIZER_NULL:
+ return;
+
+ case IR_INITIALIZER_COMPOUND: {
+ size_t i;
+ for (i = 0; i < initializer->compound.n_initializers; ++i) {
+ ir_initializer_t *subinitializer
+ = initializer->compound.initializers[i];
+ walk_initializer(subinitializer, pre, post, env);
+ }
+ return;
+ }
+ }
+ panic("invalid initializer found");
}
-void start_type_walk(ir_node *node, void *env) {
- void *pre = ((type_walk_env *)env)->pre;
- void *post = ((type_walk_env *)env)->post;
- void *envi = ((type_walk_env *)env)->env;
-
- assert(node);
-
- switch (get_irn_opcode(node)) { /* node label */
- case iro_SymConst:
- if ( (get_SymConst_kind(node) == type_tag)
- || (get_SymConst_kind(node) == size))
- type_walk_2((type_or_ent *)get_SymConst_type(node), pre, post, envi);
- break;
- case iro_Sel:
- type_walk_2((type_or_ent *)get_Sel_entity(node), pre, post, envi);
- break;
- case iro_Call:
- type_walk_2((type_or_ent *)get_Call_type(node), pre, post, envi);
- break;
- case iro_Alloc:
- type_walk_2((type_or_ent *)get_Alloc_type(node), pre, post, envi);
- break;
- case iro_Free:
- printf("here in typewalk\n");
- type_walk_2((type_or_ent *)get_Free_type(node), pre, post, envi);
- break;
- assert(node);
- default:
- break;
- }
+/**
+ * Main walker: walks over all used types/entities of a
+ * type entity.
+ */
+static void do_type_walk(type_or_ent tore,
+ type_walk_func *pre,
+ type_walk_func *post,
+ void *env)
+{
+ size_t i, n_types, n_mem;
+ ir_entity *ent = NULL;
+ ir_type *tp = NULL;
+ type_or_ent cont;
+
+ /* marked? */
+ switch (get_kind(tore.ent)) {
+ case k_entity:
+ ent = tore.ent;
+ if (entity_visited(ent))
+ return;
+ mark_entity_visited(ent);
+ break;
+ case k_type:
+ tp = tore.typ;
+ if (type_visited(tp))
+ return;
+ mark_type_visited(tp);
+ break;
+ default:
+ break;
+ }
+
+ /* execute pre method */
+ if (pre)
+ pre(tore, env);
+
+ /* iterate */
+ switch (get_kind(tore.ent)) {
+ case k_entity:
+ cont.typ = get_entity_owner(ent);
+ do_type_walk(cont, pre, post, env);
+ cont.typ = get_entity_type(ent);
+ do_type_walk(cont, pre, post, env);
+
+ /* walk over the value types */
+ if (ent->initializer != NULL) {
+ walk_initializer(ent->initializer, pre, post, env);
+ }
+ break;
+ case k_type:
+ switch (get_type_tpop_code(tp)) {
+ case tpo_class:
+ n_types = get_class_n_supertypes(tp);
+ for (i = 0; i < n_types; ++i) {
+ cont.typ = get_class_supertype(tp, i);
+ do_type_walk(cont, pre, post, env);
+ }
+ n_mem = get_class_n_members(tp);
+ for (i = 0; i < n_mem; ++i) {
+ cont.ent = get_class_member(tp, i);
+ do_type_walk(cont, pre, post, env);
+ }
+ n_types = get_class_n_subtypes(tp);
+ for (i = 0; i < n_types; ++i) {
+ cont.typ = get_class_subtype(tp, i);
+ do_type_walk(cont, pre, post, env);
+ }
+ break;
+
+ case tpo_struct:
+ n_mem = get_struct_n_members(tp);
+ for (i = 0; i < n_mem; ++i) {
+ cont.ent = get_struct_member(tp, i);
+ do_type_walk(cont, pre, post, env);
+ }
+ break;
+
+ case tpo_method:
+ n_mem = get_method_n_params(tp);
+ for (i = 0; i < n_mem; ++i) {
+ cont.typ = get_method_param_type(tp, i);
+ do_type_walk(cont, pre, post, env);
+ }
+ n_mem = get_method_n_ress(tp);
+ for (i = 0; i < n_mem; ++i) {
+ cont.typ = get_method_res_type(tp, i);
+ do_type_walk(cont, pre, post, env);
+ }
+ break;
+
+ case tpo_union:
+ n_mem = get_union_n_members(tp);
+ for (i = 0; i < n_mem; ++i) {
+ cont.ent = get_union_member(tp, i);
+ do_type_walk(cont, pre, post, env);
+ }
+ break;
+
+ case tpo_array:
+ cont.typ = get_array_element_type(tp);
+ do_type_walk(cont, pre, post, env);
+ cont.ent = get_array_element_entity(tp);
+ do_type_walk(cont, pre, post, env);
+ break;
+
+ case tpo_enumeration:
+ /* a leave */
+ break;
+
+ case tpo_pointer:
+ cont.typ = get_pointer_points_to_type(tp);
+ do_type_walk(cont, pre, post, env);
+ break;
+
+ case tpo_code:
+ case tpo_primitive:
+ case tpo_none:
+ case tpo_unknown:
+ /* a leave. */
+ break;
+ case tpo_uninitialized:
+ assert(0 && "Faulty type");
+ break;
+ }
+ break; /* end case k_type */
+
+ default:
+ printf(" *** Faulty type or entity! \n");
+ break;
+ }
+
+ /* execute post method */
+ if (post)
+ post(tore, env);
}
-void type_walk(ir_graph *irg,
- void (pre)(type_or_ent*, void*), void (post)(type_or_ent*, void*),
- void *env)
+/** Check whether node contains types or entities as an attribute.
+ If so start a walk over that information. */
+static void irn_type_walker(
+ ir_node *node, type_walk_func *pre, type_walk_func *post, void *env)
{
- /* this is needed to pass the parameters to the walker that actually
- walks the type information */
- type_walk_env* type_env;
- type_env = (type_walk_env *) malloc (sizeof(type_walk_env));
- type_env->pre = pre;
- type_env->post = post;
- type_env->env = env;
+ type_or_ent cont;
- ++type_visited;
- irg_walk(get_irg_end(irg), start_type_walk, NULL, type_env);
+ assert(node);
- type_walk_2((type_or_ent *)get_irg_ent(irg), pre, post, env);
+ cont.ent = get_irn_entity_attr(node);
+ if (cont.ent)
+ do_type_walk(cont, pre, post, env);
+ cont.typ = get_irn_type_attr(node);
+ if (cont.typ)
+ do_type_walk(cont, pre, post, env);
+}
+
+/** Check whether node contains types or entities as an attribute.
+ If so start a walk over that information. */
+static void start_type_walk(ir_node *node, void *ctx)
+{
+ type_walk_env *env = (type_walk_env*)ctx;
+ type_walk_func *pre;
+ type_walk_func *post;
+ void *envi;
+
+ pre = env->pre;
+ post = env->post;
+ envi = env->env;
+
+ irn_type_walker(node, pre, post, envi);
+}
+
+void type_walk(type_walk_func *pre, type_walk_func *post, void *env)
+{
+ size_t i, n_types = get_irp_n_types();
+ type_or_ent cont;
+
+ irp_reserve_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+ inc_master_type_visited();
+ for (i = 0; i < n_types; ++i) {
+ cont.typ = get_irp_type(i);
+ do_type_walk(cont, pre, post, env);
+ }
+ cont.typ = get_glob_type();
+ do_type_walk(cont, pre, post, env);
+ irp_free_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+}
+
+void type_walk_irg(ir_graph *irg,
+ type_walk_func *pre,
+ type_walk_func *post,
+ void *env)
+{
+ ir_graph *rem = current_ir_graph;
+ /* this is needed to pass the parameters to the walker that actually
+ walks the type information */
+ type_walk_env type_env;
+ type_or_ent cont;
+
+ type_env.pre = pre;
+ type_env.post = post;
+ type_env.env = env;
+
+ current_ir_graph = irg;
+
+ /* We walk over the irg to find all IR-nodes that contain an attribute
+ with type information. If we find one we call a type walker to
+ touch the reachable type information.
+ The same type can be referenced by several IR-nodes. To avoid
+ repeated visits of the same type node we must decrease the
+ type visited flag for each walk. This is done in start_type_walk().
+ Here we initially increase the flag. We only call do_type_walk that does
+ not increase the flag.
+ */
+ irp_reserve_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+ inc_master_type_visited();
+ irg_walk(get_irg_end(irg), start_type_walk, NULL, &type_env);
+
+ cont.ent = get_irg_entity(irg);
+ do_type_walk(cont, pre, post, env);
+
+ cont.typ = get_irg_frame_type(irg);
+ do_type_walk(cont, pre, post, env);
+
+ current_ir_graph = rem;
+ irp_free_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+}
+
+static void type_walk_s2s_2(type_or_ent tore,
+ type_walk_func *pre,
+ type_walk_func *post,
+ void *env)
+{
+ type_or_ent cont;
+
+ /* marked? */
+ switch (get_kind(tore.ent)) {
+ case k_entity:
+ if (entity_visited(tore.ent)) return;
+ break;
+ case k_type:
+ if (type_visited(tore.typ)) return;
+ break;
+ default:
+ break;
+ }
+
+ /* iterate */
+ switch (get_kind(tore.typ)) {
+ case k_type:
+ {
+ ir_type *tp = tore.typ;
+ mark_type_visited(tp);
+ switch (get_type_tpop_code(tp)) {
+ case tpo_class:
+ {
+ size_t i, n;
+
+ n = get_class_n_supertypes(tp);
+ for (i = 0; i < n; ++i) {
+ cont.typ = get_class_supertype(tp, i);
+ type_walk_s2s_2(cont, pre, post, env);
+ }
+ /* execute pre method */
+ if (pre)
+ pre(tore, env);
+
+ n = get_class_n_subtypes(tp);
+ for (i = 0; i < n; ++i) {
+ cont.typ = get_class_subtype(tp, i);
+ type_walk_s2s_2(cont, pre, post, env);
+ }
+
+ /* execute post method */
+ if (post)
+ post(tore, env);
+ }
+ break;
+ case tpo_struct:
+ case tpo_method:
+ case tpo_union:
+ case tpo_array:
+ case tpo_enumeration:
+ case tpo_pointer:
+ case tpo_primitive:
+ /* dont care */
+ break;
+ default:
+ printf(" *** Faulty type! \n");
+ break;
+ }
+ } break; /* end case k_type */
+ case k_entity:
+ /* don't care */
+ break;
+ default:
+ printf(" *** Faulty type or entity! \n");
+ break;
+ }
+}
+
+void type_walk_super2sub(type_walk_func *pre,
+ type_walk_func *post,
+ void *env)
+{
+ type_or_ent cont;
+ size_t i, n_types = get_irp_n_types();
+
+ irp_reserve_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+ inc_master_type_visited();
+ cont.typ = get_glob_type();
+ type_walk_s2s_2(cont, pre, post, env);
+ for (i = 0; i < n_types; ++i) {
+ cont.typ = get_irp_type(i);
+ type_walk_s2s_2(cont, pre, post, env);
+ }
+ irp_free_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+}
+
+/*****************************************************************************/
+
+static void type_walk_super_2(type_or_ent tore, type_walk_func *pre,
+ type_walk_func *post, void *env)
+{
+ type_or_ent cont;
+
+ /* marked? */
+ switch (get_kind(tore.ent)) {
+ case k_entity:
+ if (entity_visited(tore.ent))
+ return;
+ break;
+ case k_type:
+ if (type_visited(tore.typ))
+ return;
+ break;
+ default:
+ break;
+ }
+
+ /* iterate */
+ switch (get_kind(tore.typ)) {
+ case k_type:
+ {
+ ir_type *tp = tore.typ;
+ mark_type_visited(tp);
+ switch (get_type_tpop_code(tp)) {
+ case tpo_class:
+ {
+ size_t i, n;
+
+ /* execute pre method */
+ if (pre)
+ pre(tore, env);
+
+ n = get_class_n_supertypes(tp);
+ for (i = 0; i < n; ++i) {
+ cont.typ = get_class_supertype(tp, i);
+ type_walk_super_2(cont, pre, post, env);
+ }
+
+ /* execute post method */
+ if (post)
+ post(tore, env);
+ }
+ break;
+ case tpo_struct:
+ case tpo_method:
+ case tpo_union:
+ case tpo_array:
+ case tpo_enumeration:
+ case tpo_pointer:
+ case tpo_primitive:
+ /* don't care */
+ break;
+ default:
+ printf(" *** Faulty type! \n");
+ break;
+ }
+ } break; /* end case k_type */
+ case k_entity:
+ /* don't care */
+ break;
+ default:
+ printf(" *** Faulty type or entity! \n");
+ break;
+ }
+}
+
+void type_walk_super(type_walk_func *pre, type_walk_func *post, void *env)
+{
+ size_t i, n_types = get_irp_n_types();
+ type_or_ent cont;
+
+ irp_reserve_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+ inc_master_type_visited();
+ cont.typ = get_glob_type();
+ type_walk_super_2(cont, pre, post, env);
+ for (i = 0; i < n_types; ++i) {
+ cont.typ = get_irp_type(i);
+ type_walk_super_2(cont, pre, post, env);
+ }
+ irp_free_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+}
+
+/*****************************************************************************/
+
+
+static void class_walk_s2s_2(ir_type *tp, class_walk_func *pre,
+ class_walk_func *post, void *env)
+{
+ size_t i, n;
+
+ /* marked? */
+ if (type_visited(tp)) return;
+
+ /* Assure all supertypes are visited before */
+ n = get_class_n_supertypes(tp);
+ for (i = 0; i < n; ++i) {
+ if (type_not_visited(get_class_supertype(tp, i)))
+ return;
+ }
+
+ mark_type_visited(tp);
+
+ /* execute pre method */
+ if (pre)
+ pre(tp, env);
+
+ n = get_class_n_subtypes(tp);
+ for (i = 0; i < n; ++i) {
+ class_walk_s2s_2(get_class_subtype(tp, i), pre, post, env);
+ }
+ /* execute post method */
+ if (post)
+ post(tp, env);
+}
+
+void class_walk_super2sub(class_walk_func *pre,
+ class_walk_func *post,
+ void *env)
+{
+ size_t i, n_types = get_irp_n_types();
+ ir_type *tp;
+
+ irp_reserve_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+ inc_master_type_visited();
+ for (i = 0; i < n_types; i++) {
+ tp = get_irp_type(i);
+ if (is_Class_type(tp) &&
+ (get_class_n_supertypes(tp) == 0) &&
+ type_not_visited(tp) &&
+ (! is_frame_type(tp)) &&
+ (tp != get_glob_type())) {
+ class_walk_s2s_2(tp, pre, post, env);
+ }
+ }
+ irp_free_resources(irp, IRP_RESOURCE_TYPE_VISITED);
+}
+
+
+void walk_types_entities(ir_type *tp,
+ entity_walk_func *doit,
+ void *env)
+{
+ size_t i, n;
- return;
+ switch (get_type_tpop_code(tp)) {
+ case tpo_class:
+ n = get_class_n_members(tp);
+ for (i = 0; i < n; ++i)
+ doit(get_class_member(tp, i), env);
+ break;
+ case tpo_struct:
+ n = get_struct_n_members(tp);
+ for (i = 0; i < n; ++i)
+ doit(get_struct_member(tp, i), env);
+ break;
+ case tpo_union:
+ n = get_union_n_members(tp);
+ for (i = 0; i < n; ++i)
+ doit(get_union_member(tp, i), env);
+ break;
+ case tpo_array:
+ doit(get_array_element_entity(tp), env);
+ break;
+ case tpo_method:
+ case tpo_enumeration:
+ case tpo_pointer:
+ case tpo_primitive:
+ default:
+ break;
+ }
}
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