refactor add rb_method_entry_from_template

Tired of rb_method_entry_create(..., rb_method_definition_create(
..., &(rb_method_foo_t) {...})) maneuver.  Provide a function that
does the thing to reduce copy&paste.

class.c

@@ -967,18 +967,11 @@ inject_refined_method(ID *key, VALUE *value, void *data, int _)
     const tuple             *ptr     = data;
     const rb_method_entry_t *me      = *(rb_method_entry_t **) value;
     const rb_method_entry_t *orig_me = me->def->body.refined.orig_me;
-    rb_method_entry_t       *new_me  =
+    const rb_method_entry_t *new_me  =
-        rb_method_entry_create(
+        rb_method_entry_from_template(
-            me->called_id,
+            me, &(rb_method_refined_t) {
-            me->owner,
+                .orig_me = NULL,
-            me->defined_class,
+                .owner   = me->def->body.refined.owner, });
-            rb_method_definition_create(
-                me->def->type,
-                me->def->original_id,
-                &(rb_method_refined_t) {
-                    .orig_me = NULL,
-                    .owner   = me->def->body.refined.owner, }));
-    METHOD_ENTRY_FLAGS_COPY(new_me, me);
     rb_id_table_insert(RCLASS_M_TBL(ptr->klass), *key, (VALUE)new_me);
     RB_OBJ_WRITTEN(ptr->klass, Qundef, new_me);
     *value = (VALUE)rb_method_entry_clone(orig_me);

method.h

@@ -185,15 +185,14 @@ STATIC_ASSERT(sizeof_method_def, offsetof(rb_method_definition_t, body)==8);
     ((def)->type == VM_METHOD_TYPE_REFINED && \
      UNDEFINED_METHOD_ENTRY_P((def)->body.refined.orig_me))
 
-const rb_method_definition_t *rb_method_definition_create(rb_method_type_t which, ID what, const void *how);
-
 void rb_add_method_cfunc(VALUE klass, ID mid, VALUE (*func)(ANYARGS), int argc, rb_method_visibility_t visi);
 void rb_add_method_iseq(VALUE klass, ID mid, const rb_iseq_t *iseq, rb_cref_t *cref, rb_method_visibility_t visi);
 void rb_add_refined_method_entry(VALUE refined_class, ID mid);
 void rb_add_method(VALUE klass, ID mid, rb_method_type_t type, void *option, rb_method_visibility_t visi);
 
 rb_method_entry_t *rb_method_entry_set(VALUE klass, ID mid, const rb_method_entry_t *, rb_method_visibility_t noex);
-rb_method_entry_t *rb_method_entry_create(ID called_id, VALUE klass, rb_method_visibility_t visi, const rb_method_definition_t *def);
+const rb_method_entry_t *rb_method_entry_from_template(const rb_method_entry_t *template, const void *opts);
+const rb_method_entry_t *rb_method_entry_for_missing(ID mid, VALUE klass);
 
 const rb_method_entry_t *rb_method_entry_at(VALUE obj, ID id);
 

proc.c

@@ -1474,16 +1474,9 @@ mnew_missing(VALUE klass, VALUE obj, ID id, VALUE mclass)
 {
     struct METHOD *data;
     VALUE method = TypedData_Make_Struct(mclass, struct METHOD, &method_data_type, data);
-    rb_method_entry_t *me;
-    const rb_method_definition_t *def;
-
     RB_OBJ_WRITE(method, &data->recv, obj);
     RB_OBJ_WRITE(method, &data->klass, klass);
-
+    RB_OBJ_WRITE(method, &data->me, rb_method_entry_for_missing(id, klass));
-    def = rb_method_definition_create(VM_METHOD_TYPE_MISSING, id, NULL);
-    me = rb_method_entry_create(id, klass, METHOD_VISI_UNDEF, def);
-
-    RB_OBJ_WRITE(method, &data->me, me);
 
     OBJ_INFECT(method, klass);
 

vm_insnhelper.c

@@ -2587,16 +2587,8 @@ aliased_callable_method_entry0(const rb_method_entry_t *me)
 	VALUE defined_class = find_defined_class_by_owner(me->defined_class, orig_me->owner);
 	VM_ASSERT(RB_TYPE_P(orig_me->owner, T_MODULE));
 	cme = rb_method_entry_complement_defined_class(orig_me, me->called_id, defined_class);
-        rb_method_entry_t *ret =
+        const rb_method_entry_t *ret =
-            rb_method_entry_create(
+            rb_method_entry_from_template((const rb_method_entry_t*)me, cme);
-                me->called_id,
-                me->owner,
-                me->defined_class,
-                rb_method_definition_create(
-                    VM_METHOD_TYPE_ALIAS,
-                    me->def->original_id,
-                    cme));
-        METHOD_ENTRY_FLAGS_COPY(ret, (const void*)me);
         rb_method_entry_spoof(ret);
         return ret;
     }

vm_method.c

@@ -452,7 +452,7 @@ rb_method_entry_spoof(const rb_method_entry_t *me)
     rb_clear_method_cache_by_class(o);
 }
 
-MJIT_FUNC_EXPORTED const rb_method_definition_t *
+static const rb_method_definition_t *
 rb_method_definition_create(rb_method_type_t type, ID mid, const void *opts)
 {
     rb_method_definition_t template = rb_method_definition_new(type, mid, opts);
@@ -483,6 +483,9 @@ rb_method_entry_alloc(VALUE flags, ID called_id, VALUE owner, VALUE defined_clas
     rb_method_entry_t tmp = { flags, };
     rb_method_entry_t *me = (rb_method_entry_t *)rb_imemo_new(imemo_ment, (VALUE)def, (VALUE)called_id, owner, defined_class);
     METHOD_ENTRY_FLAGS_COPY(me, &tmp);
+    if (def) {
+        method_definition_reset(me);
+    }
     return me;
 }
 
@@ -500,20 +503,42 @@ filter_defined_class(VALUE klass)
     rb_bug("filter_defined_class: %s", rb_obj_info(klass));
 }
 
-MJIT_FUNC_EXPORTED rb_method_entry_t *
+static inline VALUE
-rb_method_entry_create(ID called_id, VALUE klass, rb_method_visibility_t visi, const rb_method_definition_t *def)
+method_entry_flags(rb_method_visibility_t visi)
 {
     rb_method_entry_t tmp = { 0, };
     METHOD_ENTRY_FLAGS_SET(&tmp, visi, !ruby_running);
-    rb_method_entry_t *me =
+    return tmp.flags;
-        rb_method_entry_alloc(
+}
-            tmp.flags,
+
-            called_id,
+MJIT_FUNC_EXPORTED const rb_method_entry_t *
-            klass,
+rb_method_entry_from_template(
-            filter_defined_class(klass),
+    const rb_method_entry_t *me,
-            def);
+    const void *body)
-    if (def != NULL) method_definition_reset(me);
+{
-    return me;
+    return rb_method_entry_alloc(
+        me->flags,
+        me->called_id,
+        me->owner,
+        me->defined_class,
+        rb_method_definition_create(
+            me->def->type,
+            me->def->original_id,
+            body));
+}
+
+const rb_method_entry_t *
+rb_method_entry_for_missing(ID mid, VALUE klass)
+{
+    return rb_method_entry_alloc(
+        method_entry_flags(METHOD_VISI_UNDEF),
+        mid,
+        klass,
+        filter_defined_class(klass),
+        rb_method_definition_create(
+            VM_METHOD_TYPE_MISSING,
+            mid,
+            NULL));
 }
 
 const rb_method_entry_t *
@@ -569,32 +594,26 @@ make_method_entry_refined(VALUE owner, rb_method_entry_t *me)
     }
     else {
 	rb_vm_check_redefinition_opt_method(me, me->owner);
-        rb_method_entry_t *orig_me =
+        /* :FIXME: can rb_method_entry_from_template be tweaked to also be
-            rb_method_entry_alloc(
+         * applicable here? */
-                me->flags,
+        return rb_method_entry_alloc(
-                me->called_id,
+            method_entry_flags(METHOD_VISI_PUBLIC),
-                me->owner,
+            me->called_id,
-                me->defined_class ?
+            me->owner,
-                me->defined_class : owner,
+            me->defined_class,
-                method_definition_addref(me->def));
-        const rb_method_definition_t *def =
             rb_method_definition_create(
                 VM_METHOD_TYPE_REFINED,
                 me->called_id,
                 &(rb_method_refined_t) {
-                    .orig_me = orig_me,
                     .owner   = owner,
-                }
+                    .orig_me =
-            );
+                        rb_method_entry_alloc(
-        rb_method_entry_t *new_me =
+                            me->flags,
-            rb_method_entry_alloc(
+                            me->called_id,
-                me->flags,
+                            me->owner,
-                me->called_id,
+                            me->defined_class ?
-                me->owner,
+                            me->defined_class : owner,
-                me->defined_class,
+                            method_definition_addref(me->def))}));
-                def);
-        METHOD_ENTRY_VISI_SET(new_me, METHOD_VISI_PUBLIC);
-        return new_me;
     }
 }
 
@@ -718,7 +737,12 @@ rb_method_entry_make(VALUE klass, ID mid, VALUE defined_class, rb_method_visibil
     if (!def) {
         def = rb_method_definition_create(type, original_id, opts);
     }
-    me = rb_method_entry_create(mid, defined_class, visi, def);
+    me = rb_method_entry_alloc(
+        method_entry_flags(visi),
+        mid,
+        defined_class,
+        filter_defined_class(defined_class),
+        def);
 
     rb_clear_method_cache_by_class(klass);