nitg: add GlobalCompiler::new_file
[nit.git] / src / separate_compiler.nit
index 9996f43..612c22d 100644 (file)
@@ -26,6 +26,12 @@ redef class ToolContext
        # --no-inline-intern
        var opt_no_inline_intern: OptionBool = new OptionBool("Do not inline call to intern methods", "--no-inline-intern")
 
+       # --no-union-attribute
+       var opt_no_union_attribute: OptionBool = new OptionBool("Put primitive attibutes in a box instead of an union", "--no-union-attribute")
+
+       # --no-shortcut-equate
+       var opt_no_shortcut_equate: OptionBool = new OptionBool("Always call == in a polymorphic way", "--no-shortcut-equal")
+
        # --inline-coloring-numbers
        var opt_inline_coloring_numbers: OptionBool = new OptionBool("Inline colors and ids", "--inline-coloring-numbers")
 
@@ -46,6 +52,8 @@ redef class ToolContext
                super
                self.option_context.add_option(self.opt_separate)
                self.option_context.add_option(self.opt_no_inline_intern)
+               self.option_context.add_option(self.opt_no_union_attribute)
+               self.option_context.add_option(self.opt_no_shortcut_equate)
                self.option_context.add_option(self.opt_inline_coloring_numbers)
                self.option_context.add_option(self.opt_bm_typing)
                self.option_context.add_option(self.opt_phmod_typing)
@@ -61,6 +69,7 @@ redef class ModelBuilder
                self.toolcontext.info("*** COMPILING TO C ***", 1)
 
                var compiler = new SeparateCompiler(mainmodule, runtime_type_analysis, self)
+               compiler.compile_header
 
                # compile class structures
                for m in mainmodule.in_importation.greaters do
@@ -70,14 +79,17 @@ redef class ModelBuilder
                end
 
                # The main function of the C
+               compiler.new_file
                compiler.compile_main_function
 
                # compile methods
                for m in mainmodule.in_importation.greaters do
+                       compiler.new_file
                        compiler.compile_module_to_c(m)
                end
 
                # compile live & cast type structures
+               compiler.new_file
                var mtypes = compiler.do_type_coloring
                for t in mtypes do
                        compiler.compile_type_to_c(t)
@@ -90,6 +102,8 @@ redef class ModelBuilder
                        end
                end
 
+               compiler.display_stats
+
                write_and_make(compiler)
        end
 end
@@ -110,8 +124,8 @@ class SeparateCompiler
        private var livetypes_tables_sizes: nullable Map[MClass, Array[Int]]
        private var live_unanchored_types: Map[MClassDef, Set[MType]] = new HashMap[MClassDef, HashSet[MType]]
 
-       private var unanchored_types_colors: nullable Map[MClassType, Int]
-       private var unanchored_types_tables: nullable Map[MClassType, Array[nullable MClassType]]
+       private var unanchored_types_colors: nullable Map[MType, Int]
+       private var unanchored_types_tables: nullable Map[MClassType, Array[nullable MType]]
        private var unanchored_types_masks: nullable Map[MClassType, Int]
 
        protected var class_coloring: ClassColoring
@@ -137,52 +151,44 @@ class SeparateCompiler
 
        redef fun compile_header_structs do
                self.header.add_decl("typedef void(*nitmethod_t)(void); /* general C type representing a Nit method. */")
-               self.header.add_decl("typedef void* nitattribute_t; /* general C type representing a Nit attribute. */")
+               self.compile_header_attribute_structs
                self.header.add_decl("struct class \{ int box_kind; nitmethod_t vft[1]; \}; /* general C type representing a Nit class. */")
 
                if modelbuilder.toolcontext.opt_generic_tree.value then
-                       self.header.add_decl("struct type \{ int id; int color; short int is_nullable; int livecolor; struct vts_table *vts_table; struct fts_table *fts_table; int table_size; int type_table[1]; \}; /* general C type representing a Nit type. */")
+                       # With generic_tree, only ft and vt resolution is stored in the type
+                       self.header.add_decl("struct type \{ int id; const char *name; int color; short int is_nullable; int livecolor; struct types *vts_table; struct types *fts_table; int table_size; int type_table[1]; \}; /* general C type representing a Nit type. */")
                else
-                       self.header.add_decl("struct type \{ int id; int color; short int is_nullable; struct unanchored_table *unanchored_table; struct vts_table *vts_table; struct fts_table *fts_table; int table_size; int type_table[1]; \}; /* general C type representing a Nit type. */")
+                       # With unanchored_table, all live type resolution are stored in a big table: unanchored_table
+                       self.header.add_decl("struct type \{ int id; const char *name; int color; short int is_nullable; struct types *unanchored_table; int table_size; int type_table[1]; \}; /* general C type representing a Nit type. */")
                end
 
                if modelbuilder.toolcontext.opt_phmod_typing.value or modelbuilder.toolcontext.opt_phand_typing.value then
-                       self.header.add_decl("struct fts_table \{ int mask; struct type *fts[1]; \}; /* fts list of a C type representation. */")
-                       self.header.add_decl("struct vts_table \{ int mask; struct type *vts[1]; \}; /* vts list of a C type representation. */")
-                       self.header.add_decl("struct unanchored_table \{ int mask; struct type *types[1]; \}; /* unanchored type list of a C type representation. */")
+                       self.header.add_decl("struct types \{ int mask; struct type *types[1]; \}; /* a list types (used for vts, fts and unanchored lists). */")
                else
-                       self.header.add_decl("struct fts_table \{ struct type *fts[1]; \}; /* fts list of a C type representation. */")
-                       self.header.add_decl("struct vts_table \{ struct type *vts[1]; \}; /* vts list of a C type representation. */")
-                       self.header.add_decl("struct unanchored_table \{ struct type *types[1]; \}; /* unanchored type list of a C type representation. */")
+                       self.header.add_decl("struct types \{ struct type *types[1]; \}; /* a list types (used for vts, fts and unanchored lists). */")
                end
 
 
                self.header.add_decl("typedef struct \{ struct type *type; struct class *class; nitattribute_t attrs[1]; \} val; /* general C type representing a Nit instance. */")
        end
 
-       redef fun compile_class_names do
-               # Build type names table
-               var type_array = new Array[nullable MType]
-               for t, id in typeids do
-                       if id >= type_array.length then
-                               for i in [type_array.length..id[ do
-                                       type_array[i] = null
-                               end
+       fun compile_header_attribute_structs
+       do
+               if modelbuilder.toolcontext.opt_no_union_attribute.value then
+                       self.header.add_decl("typedef void* nitattribute_t; /* general C type representing a Nit attribute. */")
+               else
+                       self.header.add_decl("typedef union \{")
+                       self.header.add_decl("void* val;")
+                       for c, v in self.box_kinds do
+                               var t = c.mclass_type
+                               self.header.add_decl("{t.ctype} {t.ctypename};")
                        end
-                       type_array[id] = t
+                       self.header.add_decl("\} nitattribute_t; /* general C type representing a Nit attribute. */")
                end
+       end
 
-               var v = self.new_visitor
-               self.header.add_decl("extern const char const * class_names[];")
-               v.add("const char const * class_names[] = \{")
-               for t in type_array do
-                       if t == null then
-                               v.add("NULL,")
-                       else
-                               v.add("\"{t}\",")
-                       end
-               end
-               v.add("\};")
+       redef fun compile_class_names do
+               abort # There is no class name compilation since the name is stored in the type structure
        end
 
        fun compile_box_kinds
@@ -284,6 +290,9 @@ class SeparateCompiler
                mtypes.add_all(self.runtime_type_analysis.live_types)
                mtypes.add_all(self.runtime_type_analysis.live_cast_types)
                mtypes.add_all(self.undead_types)
+               for c in self.box_kinds.keys do
+                       mtypes.add(c.mclass_type)
+               end
 
                for mtype in mtypes do
                        retieve_live_partial_types(mtype)
@@ -303,29 +312,29 @@ class SeparateCompiler
                        end
                end
 
-               # fts coloration for non-erased compilation
-               if modelbuilder.toolcontext.opt_bm_typing.value then
-                       var ft_coloring = new NaiveFTColoring(self.class_coloring)
-                       self.ft_colors = ft_coloring.colorize
-                       self.ft_tables = ft_coloring.build_ft_tables
-               else if modelbuilder.toolcontext.opt_phmod_typing.value then
-                       var ft_coloring = new FTModPerfectHashing(self.class_coloring)
-                       self.ft_colors = ft_coloring.colorize
-                       self.ft_masks = ft_coloring.compute_masks
-                       self.ft_tables = ft_coloring.build_ft_tables
-               else if modelbuilder.toolcontext.opt_phand_typing.value then
-                       var ft_coloring = new FTAndPerfectHashing(self.class_coloring)
-                       self.ft_colors = ft_coloring.colorize
-                       self.ft_masks = ft_coloring.compute_masks
-                       self.ft_tables = ft_coloring.build_ft_tables
-               else
-                       var ft_coloring = new FTColoring(self.class_coloring)
-                       self.ft_colors = ft_coloring.colorize
-                       self.ft_tables = ft_coloring.build_ft_tables
-               end
-               self.compile_color_consts(self.ft_colors.as(not null))
-
                if modelbuilder.toolcontext.opt_generic_tree.value then
+                       # fts coloration for non-erased compilation
+                       if modelbuilder.toolcontext.opt_bm_typing.value then
+                               var ft_coloring = new NaiveFTColoring(self.class_coloring)
+                               self.ft_colors = ft_coloring.colorize
+                               self.ft_tables = ft_coloring.build_ft_tables
+                       else if modelbuilder.toolcontext.opt_phmod_typing.value then
+                               var ft_coloring = new FTModPerfectHashing(self.class_coloring)
+                               self.ft_colors = ft_coloring.colorize
+                               self.ft_masks = ft_coloring.compute_masks
+                               self.ft_tables = ft_coloring.build_ft_tables
+                       else if modelbuilder.toolcontext.opt_phand_typing.value then
+                               var ft_coloring = new FTAndPerfectHashing(self.class_coloring)
+                               self.ft_colors = ft_coloring.colorize
+                               self.ft_masks = ft_coloring.compute_masks
+                               self.ft_tables = ft_coloring.build_ft_tables
+                       else
+                               var ft_coloring = new FTColoring(self.class_coloring)
+                               self.ft_colors = ft_coloring.colorize
+                               self.ft_tables = ft_coloring.build_ft_tables
+                       end
+                       self.compile_color_consts(self.ft_colors.as(not null))
+
                        # colorize live entries
                        var entries_coloring
                        if modelbuilder.toolcontext.opt_bm_typing.value then
@@ -337,6 +346,7 @@ class SeparateCompiler
                        self.livetypes_tables = entries_coloring.build_livetype_tables(mtypes)
                        self.livetypes_tables_sizes = entries_coloring.livetypes_tables_sizes
                else
+                       # VT and FT are stored with other unresolved types in the big unanchored_tables
                        self.compile_unanchored_tables(mtypes)
                end
 
@@ -349,22 +359,12 @@ class SeparateCompiler
                        var type_coloring = new TypeModPerfectHashing(self.mainmodule, mtypes)
                        self.type_colors = type_coloring.compute_masks(mtypes, typeids)
                        self.type_tables = type_coloring.hash_type_tables(mtypes, typeids, type_colors)
-
-                       self.header.add_decl("int HASH(int, int);")
-                       var v = new_visitor
-                       v.add_decl("int HASH(int mask, int id) \{")
-                       v.add_decl("return mask % id;")
-                       v.add_decl("\}")
+                       self.header.add_decl("#define HASH(mask, id) ((mask)%(id))")
                else if modelbuilder.toolcontext.opt_phand_typing.value then
                        var type_coloring = new TypeAndPerfectHashing(self.mainmodule, mtypes)
                        self.type_colors = type_coloring.compute_masks(mtypes, typeids)
                        self.type_tables = type_coloring.hash_type_tables(mtypes, typeids, type_colors)
-
-                       self.header.add_decl("int HASH(int, int);")
-                       var v = new_visitor
-                       v.add_decl("int HASH(int mask, int id) \{")
-                       v.add_decl("return mask & id;")
-                       v.add_decl("\}")
+                       self.header.add_decl("#define HASH(mask, id) ((mask)&(id))")
                else
                        var type_coloring = new TypeColoring(self.mainmodule, mtypes)
                        self.type_colors = type_coloring.colorize(mtypes)
@@ -372,68 +372,64 @@ class SeparateCompiler
                end
 
 
-               # for the class_name and output_class_name methods
-               self.compile_class_names
-
                return mtypes
        end
 
        protected fun compile_unanchored_tables(mtypes: Set[MType]) do
-               var mtype2anchored = new HashMap[MClassType, Set[MClassType]]
+               # Unanchored_tables is used to perform a type resolution at runtime in O(1)
 
+               # During the visit of the body of classes, live_unanchored_types are collected
+               # and associated to
+               # Collect all live_unanchored_types (visited in the body of classes)
+
+               # Determinate fo each livetype what are its possible requested anchored types
+               var mtype2unanchored = new HashMap[MClassType, Set[MType]]
                for mtype in self.runtime_type_analysis.live_types do
+                       var set = new HashSet[MType]
                        for cd in mtype.collect_mclassdefs(self.mainmodule) do
                                if self.live_unanchored_types.has_key(cd) then
-                                       if not mtype2anchored.has_key(mtype) then
-                                               mtype2anchored[mtype] = new HashSet[MClassType]
-                                       end
-                                       for unanchored in self.live_unanchored_types[cd] do
-                                               var anchored = unanchored.anchor_to(self.mainmodule, mtype)
-                                               if anchored isa MClassType then
-                                                       mtype2anchored[mtype].add(anchored)
-                                               else if anchored isa MNullableType then
-                                                       mtype2anchored[mtype].add(anchored.mtype.as(MClassType))
-                                               else
-                                                       print "NOT YET IMPLEMENTED: try compile_unanchored_tables with {unanchored}"
-                                               end
-                                       end
+                                       set.add_all(self.live_unanchored_types[cd])
                                end
                        end
+                       mtype2unanchored[mtype] = set
                end
 
+               # Compute the table layout with the prefered method
                if modelbuilder.toolcontext.opt_bm_typing.value then
                        var unanchored_type_coloring = new NaiveUnanchoredTypeColoring
-                       self.unanchored_types_colors = unanchored_type_coloring.colorize(mtype2anchored)
-                       self.unanchored_types_tables = unanchored_type_coloring.build_tables(mtype2anchored)
+                       self.unanchored_types_colors = unanchored_type_coloring.colorize(mtype2unanchored)
+                       self.unanchored_types_tables = unanchored_type_coloring.build_tables(mtype2unanchored)
                else if modelbuilder.toolcontext.opt_phmod_typing.value then
                        var unanchored_type_coloring = new UnanchoredTypeModPerfectHashing
-                       self.unanchored_types_colors = unanchored_type_coloring.colorize(mtype2anchored)
-                       self.unanchored_types_masks = unanchored_type_coloring.compute_masks(mtype2anchored)
-                       self.unanchored_types_tables = unanchored_type_coloring.build_tables(mtype2anchored)
+                       self.unanchored_types_colors = unanchored_type_coloring.colorize(mtype2unanchored)
+                       self.unanchored_types_masks = unanchored_type_coloring.compute_masks(mtype2unanchored)
+                       self.unanchored_types_tables = unanchored_type_coloring.build_tables(mtype2unanchored)
                else if modelbuilder.toolcontext.opt_phand_typing.value then
                        var unanchored_type_coloring = new UnanchoredTypeAndPerfectHashing
-                       self.unanchored_types_colors = unanchored_type_coloring.colorize(mtype2anchored)
-                       self.unanchored_types_masks = unanchored_type_coloring.compute_masks(mtype2anchored)
-                       self.unanchored_types_tables = unanchored_type_coloring.build_tables(mtype2anchored)
+                       self.unanchored_types_colors = unanchored_type_coloring.colorize(mtype2unanchored)
+                       self.unanchored_types_masks = unanchored_type_coloring.compute_masks(mtype2unanchored)
+                       self.unanchored_types_tables = unanchored_type_coloring.build_tables(mtype2unanchored)
                else
                        var unanchored_type_coloring = new UnanchoredTypeColoring
-                       self.unanchored_types_colors = unanchored_type_coloring.colorize(mtype2anchored)
-                       self.unanchored_types_tables = unanchored_type_coloring.build_tables(mtype2anchored)
+                       self.unanchored_types_colors = unanchored_type_coloring.colorize(mtype2unanchored)
+                       self.unanchored_types_tables = unanchored_type_coloring.build_tables(mtype2unanchored)
                end
 
-               var unanchored_mtypes = new HashMap[MType, Int]
-               for mclass in modelbuilder.model.mclasses do
-                       var mtype = mclass.mclass_type
-                       if unanchored_types_colors.has_key(mtype) then
-                               unanchored_mtypes[mtype] = unanchored_types_colors[mtype]
+               # Compile a C constant for each collected unanchored type.
+               # Either to a color, or to -1 if the unanchored type is dead (no live receiver can require it)
+               var all_unanchored = new HashSet[MType]
+               for t in self.live_unanchored_types.values do
+                       all_unanchored.add_all(t)
+               end
+               var all_unanchored_types_colors = new HashMap[MType, Int]
+               for t in all_unanchored do
+                       if unanchored_types_colors.has_key(t) then
+                               all_unanchored_types_colors[t] = unanchored_types_colors[t]
                        else
-                               unanchored_mtypes[mtype] = -1
+                               all_unanchored_types_colors[t] = -1
                        end
                end
-               for mtype, color in unanchored_types_colors.as(not null) do
-                       unanchored_mtypes[mtype] = color
-               end
-               self.compile_color_consts(unanchored_mtypes)
+               self.compile_color_consts(all_unanchored_types_colors)
 
                #print "tables"
                #for k, v in unanchored_types_tables.as(not null) do
@@ -513,6 +509,8 @@ class SeparateCompiler
        # Separately compile all the method definitions of the module
        fun compile_module_to_c(mmodule: MModule)
        do
+               var old_module = self.mainmodule
+               self.mainmodule = mmodule
                for cd in mmodule.mclassdefs do
                        for pd in cd.mpropdefs do
                                if not pd isa MMethodDef then continue
@@ -525,6 +523,7 @@ class SeparateCompiler
                                end
                        end
                end
+               self.mainmodule = old_module
        end
 
        # Globaly compile the type structure of a live type
@@ -538,15 +537,16 @@ class SeparateCompiler
                self.header.add_decl("extern const struct type_{c_name} type_{c_name};")
                self.header.add_decl("struct type_{c_name} \{")
                self.header.add_decl("int id;")
+               self.header.add_decl("const char *name;")
                self.header.add_decl("int color;")
                self.header.add_decl("short int is_nullable;")
                if modelbuilder.toolcontext.opt_generic_tree.value then
                        self.header.add_decl("int livecolor;")
+                       self.header.add_decl("const struct vts_table_{c_name} *vts_table;")
+                       self.header.add_decl("const struct fts_table_{c_name} *fts_table;")
                else
-                       self.header.add_decl("const struct unanchored_table_{c_name} *types;")
+                       self.header.add_decl("const struct types *unanchored_table;")
                end
-               self.header.add_decl("const struct vts_table_{c_name} *vts_table;")
-               self.header.add_decl("const struct fts_table_{c_name} *fts_table;")
                self.header.add_decl("int table_size;")
                self.header.add_decl("int type_table[{self.type_tables[mtype].length}];")
                self.header.add_decl("\};")
@@ -554,6 +554,7 @@ class SeparateCompiler
                # const struct type_X
                v.add_decl("const struct type_{c_name} type_{c_name} = \{")
                v.add_decl("{self.typeids[mtype]},")
+               v.add_decl("\"{mtype}\", /* class_name_string */")
                v.add_decl("{self.type_colors[mtype]},")
                if mtype isa MNullableType then
                        v.add_decl("1,")
@@ -562,15 +563,23 @@ class SeparateCompiler
                end
                if modelbuilder.toolcontext.opt_generic_tree.value then
                        v.add_decl("{self.livetypes_colors[mtype]},")
+                       if compile_type_vts_table(mtype) then
+                               v.add_decl("&vts_table_{c_name},")
+                       else
+                               v.add_decl("NULL,")
+                       end
+                       if compile_type_fts_table(mtype) then
+                               v.add_decl("&fts_table_{c_name},")
+                       else
+                               v.add_decl("NULL,")
+                       end
                else
-                       if (not mtype isa MNullableType and self.unanchored_types_tables.has_key(mtype.as(MClassType))) or (mtype isa MNullableType and self.unanchored_types_tables.has_key(mtype.mtype.as(MClassType))) then
-                               v.add_decl("&unanchored_table_{c_name},")
+                       if compile_type_unanchored_table(mtype) then
+                               v.add_decl("(struct types*) &unanchored_table_{c_name},")
                        else
                                v.add_decl("NULL,")
                        end
                end
-               v.add_decl("&vts_table_{c_name},")
-               v.add_decl("&fts_table_{c_name},")
                v.add_decl("{self.type_tables[mtype].length},")
                v.add_decl("\{")
                for stype in self.type_tables[mtype] do
@@ -582,13 +591,9 @@ class SeparateCompiler
                end
                v.add_decl("\},")
                v.add_decl("\};")
-
-               compile_type_fts_table(mtype)
-               compile_type_vts_table(mtype)
-               compile_type_unanchored_table(mtype)
        end
 
-       protected fun compile_type_fts_table(mtype: MType) do
+       protected fun compile_type_fts_table(mtype: MType): Bool do
 
                var mclass_type: MClassType
                if mtype isa MNullableType then
@@ -596,6 +601,7 @@ class SeparateCompiler
                else
                        mclass_type = mtype.as(MClassType)
                end
+               if self.ft_tables[mclass_type.mclass].is_empty then return false
 
                # extern const struct fst_table_X fst_table_X
                self.header.add_decl("extern const struct fts_table_{mtype.c_name} fts_table_{mtype.c_name};")
@@ -603,7 +609,7 @@ class SeparateCompiler
                if modelbuilder.toolcontext.opt_phmod_typing.value or modelbuilder.toolcontext.opt_phand_typing.value then
                        self.header.add_decl("int mask;")
                end
-               self.header.add_decl("struct type *fts[{self.ft_tables[mclass_type.mclass].length}];")
+               self.header.add_decl("struct type *types[{self.ft_tables[mclass_type.mclass].length}];")
                self.header.add_decl("\};")
 
                # const struct fts_table_X fts_table_X
@@ -632,9 +638,10 @@ class SeparateCompiler
                end
                v.add_decl("\},")
                v.add_decl("\};")
+               return true
        end
 
-       protected fun compile_type_vts_table(mtype: MType) do
+       protected fun compile_type_vts_table(mtype: MType): Bool do
 
                var mclass_type: MClassType
                if mtype isa MNullableType then
@@ -642,6 +649,7 @@ class SeparateCompiler
                else
                        mclass_type = mtype.as(MClassType)
                end
+               if self.vt_tables[mclass_type.mclass].is_empty then return false
 
                # extern const struct vts_table_X vts_table_X
                self.header.add_decl("extern const struct vts_table_{mtype.c_name} vts_table_{mtype.c_name};")
@@ -649,7 +657,7 @@ class SeparateCompiler
                if modelbuilder.toolcontext.opt_phmod_typing.value or modelbuilder.toolcontext.opt_phand_typing.value then
                        self.header.add_decl("int mask;")
                end
-               self.header.add_decl("struct type *vts[{self.vt_tables[mclass_type.mclass].length}];")
+               self.header.add_decl("struct type *types[{self.vt_tables[mclass_type.mclass].length}];")
                self.header.add_decl("\};")
 
                # const struct vts_table_X vts_table_X
@@ -697,9 +705,10 @@ class SeparateCompiler
                end
                v.add_decl("\},")
                v.add_decl("\};")
+               return true
        end
 
-       fun compile_type_unanchored_table(mtype: MType) do
+       fun compile_type_unanchored_table(mtype: MType): Bool do
 
                var mclass_type: MClassType
                if mtype isa MNullableType then
@@ -707,6 +716,7 @@ class SeparateCompiler
                else
                        mclass_type = mtype.as(MClassType)
                end
+               if not self.unanchored_types_tables.has_key(mclass_type) then return false
 
                # extern const struct unanchored_table_X unanchored_table_X
                self.header.add_decl("extern const struct unanchored_table_{mtype.c_name} unanchored_table_{mtype.c_name};")
@@ -715,35 +725,35 @@ class SeparateCompiler
                if modelbuilder.toolcontext.opt_phmod_typing.value or modelbuilder.toolcontext.opt_phand_typing.value then
                        self.header.add_decl("int mask;")
                end
-               if not self.unanchored_types_tables.has_key(mclass_type) then
-                       self.header.add_decl("struct type *types[0];")
-               else
-                       self.header.add_decl("struct type *types[{self.unanchored_types_tables[mclass_type].length}];")
-               end
+               self.header.add_decl("struct type *types[{self.unanchored_types_tables[mclass_type].length}];")
                self.header.add_decl("\};")
 
-               if self.unanchored_types_tables.has_key(mclass_type) then
-                       # const struct fts_table_X fts_table_X
-                       var v = new_visitor
-                       v.add_decl("const struct unanchored_table_{mtype.c_name} unanchored_table_{mtype.c_name} = \{")
-                       if modelbuilder.toolcontext.opt_phmod_typing.value or modelbuilder.toolcontext.opt_phand_typing.value then
-                               v.add_decl("{self.unanchored_types_masks[mclass_type]},")
-                       end
-                       v.add_decl("\{")
-                       for t in self.unanchored_types_tables[mclass_type] do
-                               if t == null then
-                                       v.add_decl("NULL, /* empty */")
+               # const struct fts_table_X fts_table_X
+               var v = new_visitor
+               v.add_decl("const struct unanchored_table_{mtype.c_name} unanchored_table_{mtype.c_name} = \{")
+               if modelbuilder.toolcontext.opt_phmod_typing.value or modelbuilder.toolcontext.opt_phand_typing.value then
+                       v.add_decl("{self.unanchored_types_masks[mclass_type]},")
+               end
+               v.add_decl("\{")
+               for t in self.unanchored_types_tables[mclass_type] do
+                       if t == null then
+                               v.add_decl("NULL, /* empty */")
+                       else
+                               # The table stores the result of the type resolution
+                               # Therefore, for a receiver `mclass_type`, and a unresolved type `t`
+                               # the value stored is tv.
+                               var tv = t.resolve_for(mclass_type, mclass_type, self.mainmodule, true)
+                               # FIXME: What typeids means here? How can a tv not be live?
+                               if self.typeids.has_key(tv) then
+                                       v.add_decl("(struct type*)&type_{tv.c_name}, /* {t}: {tv} */")
                                else
-                                       if self.typeids.has_key(t) then
-                                               v.add_decl("(struct type*)&type_{t.c_name}, /* {t} */")
-                                       else
-                                               v.add_decl("NULL, /* empty ({t} not a live type) */")
-                                       end
+                                       v.add_decl("NULL, /* empty ({t}: {tv} not a live type) */")
                                end
                        end
-                       v.add_decl("\},")
-                       v.add_decl("\};")
                end
+               v.add_decl("\},")
+               v.add_decl("\};")
+               return true
        end
 
        # Globally compile the table of the class mclass
@@ -844,8 +854,18 @@ class SeparateCompiler
                else
                        v.add("{res} = GC_MALLOC(sizeof(struct instance_{c_name}));")
                end
-               #v.add("{res} = calloc(sizeof(struct instance_{c_name}), 1);")
                v.add("{res}->type = type;")
+               if v.compiler.modelbuilder.toolcontext.opt_hardening.value then
+                       v.add("if(type == NULL) \{")
+                       v.add_abort("type null")
+                       v.add("\}")
+                       if not v.compiler.modelbuilder.toolcontext.opt_generic_tree.value then
+                               v.add("if(type->unanchored_table == NULL) \{")
+                               v.add("fprintf(stderr, \"Insantiation of a dead type: %s\\n\", type->name);")
+                               v.add_abort("type dead")
+                               v.add("\}")
+                       end
+               end
                v.add("{res}->class = (struct class*) &class_{c_name};")
 
                self.generate_init_attr(v, res, mtype)
@@ -1082,6 +1102,17 @@ class SeparateCompilerVisitor
                end
        end
 
+       # Return a C expression returning the runtime type structure of the value
+       # The point of the method is to works also with primitives types.
+       fun type_info(value: RuntimeVariable): String
+       do
+               if value.mtype.ctype == "val*" then
+                       return "{value}->type"
+               else
+                       return "(&type_{value.mtype.c_name})"
+               end
+       end
+
        redef fun send(mmethod, arguments)
        do
                if arguments.first.mcasttype.ctype != "val*" then
@@ -1106,7 +1137,7 @@ class SeparateCompilerVisitor
                var recv = arguments.first
                s.append("val*")
                ss.append("{recv}")
-               self.varargize(msignature, arguments)
+               self.varargize(mmethod.intro, mmethod.intro.msignature.as(not null), arguments)
                for i in [0..msignature.arity[ do
                        var a = arguments[i+1]
                        var t = msignature.mparameters[i].mtype
@@ -1147,6 +1178,22 @@ class SeparateCompilerVisitor
                        end
                        self.add("\} else \{")
                end
+               if not self.compiler.modelbuilder.toolcontext.opt_no_shortcut_equate.value and (mmethod.name == "==" or mmethod.name == "!=") then
+                       assert res != null
+                       # Recv is not null, thus is arg is, it is easy to conclude (and respect the invariants)
+                       var arg = arguments[1]
+                       if arg.mcasttype isa MNullType then
+                               if mmethod.name == "==" then
+                                       self.add("{res} = 0; /* arg is null but recv is not */")
+                               else
+                                       self.add("{res} = 1; /* arg is null and recv is not */")
+                               end
+                               if maybenull then
+                                       self.add("\}")
+                               end
+                               return res
+                       end
+               end
 
                var r
                if ret == null then r = "void" else r = ret.ctype
@@ -1208,11 +1255,50 @@ class SeparateCompilerVisitor
                return res
        end
 
+       redef fun vararg_instance(mpropdef, recv, varargs, elttype)
+       do
+               # A vararg must be stored into an new array
+               # The trick is that the dymaic type of the array may depends on the receiver
+               # of the method (ie recv) if the static type is unresolved
+               # This is more complex than usual because the unanchored type must not be resolved
+               # with the current receiver (ie self).
+               # Therefore to isolate the resolution from self, a local Frame is created.
+               # One can see this implementation as an inlined method of the receiver whose only
+               # job is to allocate the array
+               var old_frame = self.frame
+               var frame = new Frame(self, mpropdef, mpropdef.mclassdef.bound_mtype, [recv])
+               self.frame = frame
+               #print "required Array[{elttype}] for recv {recv.inspect}. bound=Array[{self.resolve_for(elttype, recv)}]. selfvar={frame.arguments.first.inspect}"
+               var res = self.array_instance(varargs, elttype)
+               self.frame = old_frame
+               return res
+       end
+
        redef fun isset_attribute(a, recv)
        do
                self.check_recv_notnull(recv)
                var res = self.new_var(bool_type)
-               self.add("{res} = {recv}->attrs[{a.const_color}] != NULL; /* {a} on {recv.inspect}*/")
+
+               # What is the declared type of the attribute?
+               var mtype = a.intro.static_mtype.as(not null)
+               var intromclassdef = a.intro.mclassdef
+               mtype = mtype.resolve_for(intromclassdef.bound_mtype, intromclassdef.bound_mtype, intromclassdef.mmodule, true)
+
+               if mtype isa MNullableType then
+                       self.add("{res} = 1; /* easy isset: {a} on {recv.inspect} */")
+                       return res
+               end
+
+               if self.compiler.modelbuilder.toolcontext.opt_no_union_attribute.value then
+                       self.add("{res} = {recv}->attrs[{a.const_color}] != NULL; /* {a} on {recv.inspect}*/")
+               else
+
+                       if mtype.ctype == "val*" then
+                               self.add("{res} = {recv}->attrs[{a.const_color}].val != NULL; /* {a} on {recv.inspect} */")
+                       else
+                               self.add("{res} = 1; /* NOT YET IMPLEMENTED: isset of primitives: {a} on {recv.inspect} */")
+                       end
+               end
                return res
        end
 
@@ -1225,22 +1311,37 @@ class SeparateCompilerVisitor
                var intromclassdef = a.intro.mclassdef
                ret = ret.resolve_for(intromclassdef.bound_mtype, intromclassdef.bound_mtype, intromclassdef.mmodule, true)
 
-               # Get the attribute or a box (ie. always a val*)
-               var cret = self.object_type.as_nullable
-               var res = self.new_var(cret)
-               res.mcasttype = ret
-               self.add("{res} = {recv}->attrs[{a.const_color}]; /* {a} on {recv.inspect} */")
+               if self.compiler.modelbuilder.toolcontext.opt_no_union_attribute.value then
+                       # Get the attribute or a box (ie. always a val*)
+                       var cret = self.object_type.as_nullable
+                       var res = self.new_var(cret)
+                       res.mcasttype = ret
 
-               # Check for Uninitialized attribute
-               if not ret isa MNullableType and not self.compiler.modelbuilder.toolcontext.opt_no_check_initialization.value then
-                       self.add("if ({res} == NULL) \{")
-                       self.add_abort("Uninitialized attribute {a.name}")
-                       self.add("\}")
-               end
+                       self.add("{res} = {recv}->attrs[{a.const_color}]; /* {a} on {recv.inspect} */")
+
+                       # Check for Uninitialized attribute
+                       if not ret isa MNullableType and not self.compiler.modelbuilder.toolcontext.opt_no_check_initialization.value then
+                               self.add("if ({res} == NULL) \{")
+                               self.add_abort("Uninitialized attribute {a.name}")
+                               self.add("\}")
+                       end
+
+                       # Return the attribute or its unboxed version
+                       # Note: it is mandatory since we reuse the box on write, we do not whant that the box escapes
+                       return self.autobox(res, ret)
+               else
+                       var res = self.new_var(ret)
+                       self.add("{res} = {recv}->attrs[{a.const_color}].{ret.ctypename}; /* {a} on {recv.inspect} */")
 
-               # Return the attribute or its unboxed version
-               # Note: it is mandatory since we reuse the box on write, we do not whant that the box escapes
-               return self.autobox(res, ret)
+                       # Check for Uninitialized attribute
+                       if ret.ctype == "val*" and not ret isa MNullableType and not self.compiler.modelbuilder.toolcontext.opt_no_check_initialization.value then
+                               self.add("if ({res} == NULL) \{")
+                               self.add_abort("Uninitialized attribute {a.name}")
+                               self.add("\}")
+                       end
+
+                       return res
+               end
        end
 
        redef fun write_attribute(a, recv, value)
@@ -1254,20 +1355,25 @@ class SeparateCompilerVisitor
 
                # Adapt the value to the declared type
                value = self.autobox(value, mtype)
-               var attr = "{recv}->attrs[{a.const_color}]"
-               if mtype.ctype != "val*" then
-                       assert mtype isa MClassType
-                       # The attribute is primitive, thus we store it in a box
-                       # The trick is to create the box the first time then resuse the box
-                       self.add("if ({attr} != NULL) \{")
-                       self.add("((struct instance_{mtype.c_name}*){attr})->value = {value}; /* {a} on {recv.inspect} */")
-                       self.add("\} else \{")
-                       value = self.autobox(value, self.object_type.as_nullable)
-                       self.add("{attr} = {value}; /* {a} on {recv.inspect} */")
-                       self.add("\}")
+
+               if self.compiler.modelbuilder.toolcontext.opt_no_union_attribute.value then
+                       var attr = "{recv}->attrs[{a.const_color}]"
+                       if mtype.ctype != "val*" then
+                               assert mtype isa MClassType
+                               # The attribute is primitive, thus we store it in a box
+                               # The trick is to create the box the first time then resuse the box
+                               self.add("if ({attr} != NULL) \{")
+                               self.add("((struct instance_{mtype.c_name}*){attr})->value = {value}; /* {a} on {recv.inspect} */")
+                               self.add("\} else \{")
+                               value = self.autobox(value, self.object_type.as_nullable)
+                               self.add("{attr} = {value}; /* {a} on {recv.inspect} */")
+                               self.add("\}")
+                       else
+                               # The attribute is not primitive, thus store it direclty
+                               self.add("{attr} = {value}; /* {a} on {recv.inspect} */")
+                       end
                else
-                       # The attribute is not primitive, thus store it direclty
-                       self.add("{attr} = {value}; /* {a} on {recv.inspect} */")
+                       self.add("{recv}->attrs[{a.const_color}].{mtype.ctypename} = {value}; /* {a} on {recv.inspect} */")
                end
        end
 
@@ -1285,17 +1391,19 @@ class SeparateCompilerVisitor
                                ntype = ntype.mtype
                        end
 
+                       var recv = self.frame.arguments.first
+                       var recv_type_info = self.type_info(recv)
                        if ntype isa MParameterType then
                                if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                                       buffer.append("[self->type->fts_table->fts[HASH(self->type->fts_table->mask, {ntype.const_color})]->livecolor]")
+                                       buffer.append("[{recv_type_info}->fts_table->types[HASH({recv_type_info}->fts_table->mask, {ntype.const_color})]->livecolor]")
                                else
-                                       buffer.append("[self->type->fts_table->fts[{ntype.const_color}]->livecolor]")
+                                       buffer.append("[{recv_type_info}->fts_table->types[{ntype.const_color}]->livecolor]")
                                end
                        else if ntype isa MVirtualType then
                                if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                                       buffer.append("[self->type->vts_table->vts[HASH(self->type->vts_table->mask, {ntype.mproperty.const_color})]->livecolor]")
+                                       buffer.append("[{recv_type_info}->vts_table->types[HASH({recv_type_info}->vts_table->mask, {ntype.mproperty.const_color})]->livecolor]")
                                else
-                                       buffer.append("[self->type->vts_table->vts[{ntype.mproperty.const_color}]->livecolor]")
+                                       buffer.append("[{recv_type_info}->vts_table->types[{ntype.mproperty.const_color}]->livecolor]")
                                end
                        else if ntype isa MGenericType and ntype.need_anchor then
                                var bbuff = new Buffer
@@ -1322,11 +1430,11 @@ class SeparateCompilerVisitor
                        else
                                link_unanchored_type(self.frame.mpropdef.mclassdef, mtype)
                                var recv = self.frame.arguments.first
-                               var recv_boxed = self.autobox(recv, self.object_type)
+                               var recv_type_info = self.type_info(recv)
                                if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                                       return self.new_expr("NEW_{mtype.mclass.c_name}((struct type *) {recv_boxed}->type->unanchored_table->types[HASH({recv_boxed}->type->unanchored_table->mask, {mtype.mclass.mclass_type.const_color})])", mtype)
+                                       return self.new_expr("NEW_{mtype.mclass.c_name}((struct type *) {recv_type_info}->unanchored_table->types[HASH({recv_type_info}->unanchored_table->mask, {mtype.const_color})])", mtype)
                                else
-                                       return self.new_expr("NEW_{mtype.mclass.c_name}((struct type *) {recv_boxed}->type->unanchored_table->types[{mtype.mclass.mclass_type.const_color}])", mtype)
+                                       return self.new_expr("NEW_{mtype.mclass.c_name}((struct type *) {recv_type_info}->unanchored_table->types[{mtype.const_color}])", mtype)
                                end
                        end
                end
@@ -1341,18 +1449,16 @@ class SeparateCompilerVisitor
        end
 
 
-       redef fun type_test(value, mtype)
+       redef fun type_test(value, mtype, tag)
        do
                self.add("/* {value.inspect} isa {mtype} */")
                var compiler = self.compiler.as(SeparateCompiler)
 
                var recv = self.frame.arguments.first
-               var recv_boxed = self.autobox(recv, self.object_type)
+               var recv_type_info = self.type_info(recv)
 
                var res = self.new_var(bool_type)
 
-               var type_struct = self.get_name("type_struct")
-               self.add_decl("struct type* {type_struct};")
                var cltype = self.get_name("cltype")
                self.add_decl("int {cltype};")
                var idtype = self.get_name("idtype")
@@ -1360,61 +1466,72 @@ class SeparateCompilerVisitor
                var is_nullable = self.get_name("is_nullable")
                self.add_decl("short int {is_nullable};")
 
-               var boxed = self.autobox(value, self.object_type)
-
-               if not compiler.modelbuilder.toolcontext.opt_generic_tree.value and mtype.need_anchor then
-                       link_unanchored_type(self.frame.mpropdef.mclassdef, mtype)
-               end
-
                var ntype = mtype
                if ntype isa MNullableType then
                        ntype = ntype.mtype
                end
 
-               if ntype isa MParameterType then
-                       if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                               self.add("{type_struct} = {recv_boxed}->type->fts_table->fts[HASH({recv_boxed}->type->fts_table->mask, {ntype.const_color})];")
-                       else
-                               self.add("{type_struct} = {recv_boxed}->type->fts_table->fts[{ntype.const_color}];")
+               if value.mcasttype.is_subtype(self.frame.mpropdef.mclassdef.mmodule, self.frame.mpropdef.mclassdef.bound_mtype, mtype) then
+                       self.add("{res} = 1; /* easy {value.inspect} isa {mtype}*/")
+                       if compiler.modelbuilder.toolcontext.opt_typing_test_metrics.value then
+                               self.compiler.count_type_test_skipped[tag] += 1
+                               self.add("count_type_test_skipped_{tag}++;")
                        end
-                       self.add("{cltype} = {type_struct}->color;")
-                       self.add("{idtype} = {type_struct}->id;")
-                       self.add("{is_nullable} = {type_struct}->is_nullable;")
-               else if ntype isa MGenericType and ntype.need_anchor then
+                       return res
+               end
+
+               if ntype.need_anchor then
+                       var type_struct = self.get_name("type_struct")
+                       self.add_decl("struct type* {type_struct};")
+
+                       # For unresolved types, there is two implementations
                        if compiler.modelbuilder.toolcontext.opt_generic_tree.value then
-                               var buff = new Buffer
-                               retrieve_anchored_livetype(ntype, buff)
-                               self.add("{type_struct} = (struct type*)livetypes_{ntype.mclass.c_name}{buff.to_s};")
-                               self.add("{cltype} = {type_struct}->color;")
-                               self.add("{idtype} = {type_struct}->id;")
-                               self.add("{is_nullable} = {type_struct}->is_nullable;")
+                               # Either with the generic_tree and the construction of a type
+                               if ntype isa MParameterType then
+                                       if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
+                                               self.add("{type_struct} = {recv_type_info}->fts_table->types[HASH({recv_type_info}->fts_table->mask, {ntype.const_color})];")
+                                       else
+                                               self.add("{type_struct} = {recv_type_info}->fts_table->types[{ntype.const_color}];")
+                                       end
+                               else if ntype isa MVirtualType then
+                                       var vtcolor = ntype.mproperty.const_color
+                                       if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
+                                               self.add("{type_struct} = {recv_type_info}->vts_table->types[HASH({recv_type_info}->vts_table->mask, {vtcolor})];")
+                                       else
+                                               self.add("{type_struct} = {recv_type_info}->vts_table->types[{vtcolor}];")
+                                       end
+                               else if ntype isa MGenericType then
+                                       var buff = new Buffer
+                                       retrieve_anchored_livetype(ntype, buff)
+                                       self.add("{type_struct} = (struct type*)livetypes_{ntype.mclass.c_name}{buff.to_s};")
+                               end
                        else
+                               # Either with unanchored_table with a direct resolution
+                               link_unanchored_type(self.frame.mpropdef.mclassdef, ntype)
                                if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                                       self.add("{type_struct} = {recv_boxed}->type->unanchored_table->types[HASH({recv_boxed}->type->unanchored_table->mask, {ntype.mclass.mclass_type.const_color})];")
+                                       self.add("{type_struct} = {recv_type_info}->unanchored_table->types[HASH({recv_type_info}->unanchored_table->mask, {ntype.const_color})];")
                                else
-                                       self.add("{type_struct} = {recv_boxed}->type->unanchored_table->types[{ntype.mclass.mclass_type.const_color}];")
+                                       self.add("{type_struct} = {recv_type_info}->unanchored_table->types[{ntype.const_color}];")
+                               end
+                               if compiler.modelbuilder.toolcontext.opt_typing_test_metrics.value then
+                                       self.compiler.count_type_test_unresolved[tag] += 1
+                                       self.add("count_type_test_unresolved_{tag}++;")
                                end
-                               self.add("{cltype} = {type_struct}->color;")
-                               self.add("{idtype} = {type_struct}->id;")
-                               self.add("{is_nullable} = {type_struct}->is_nullable;")
                        end
+                       self.add("{cltype} = {type_struct}->color;")
+                       self.add("{idtype} = {type_struct}->id;")
+                       self.add("{is_nullable} = {type_struct}->is_nullable;")
                else if ntype isa MClassType then
                        compiler.undead_types.add(mtype)
                        self.add("{cltype} = type_{mtype.c_name}.color;")
                        self.add("{idtype} = type_{mtype.c_name}.id;")
                        self.add("{is_nullable} = type_{mtype.c_name}.is_nullable;")
-               else if ntype isa MVirtualType then
-                       var vtcolor = ntype.mproperty.const_color
-                       if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                               self.add("{type_struct} = {recv_boxed}->type->vts_table->vts[HASH({recv_boxed}->type->vts_table->mask, {vtcolor})];")
-                       else
-                               self.add("{type_struct} = {recv_boxed}->type->vts_table->vts[{vtcolor}];")
+                       if compiler.modelbuilder.toolcontext.opt_typing_test_metrics.value then
+                               self.compiler.count_type_test_resolved[tag] += 1
+                               self.add("count_type_test_resolved_{tag}++;")
                        end
-                       self.add("{cltype} = {type_struct}->color;")
-                       self.add("{idtype} = {type_struct}->id;")
-                       self.add("{is_nullable} = {type_struct}->is_nullable;")
                else
-                       self.add("printf(\"NOT YET IMPLEMENTED: type_test(%s, {mtype}).\\n\", \"{boxed.inspect}\"); exit(1);")
+                       self.add("printf(\"NOT YET IMPLEMENTED: type_test(%s, {mtype}).\\n\", \"{value.inspect}\"); exit(1);")
                end
 
                if mtype isa MNullableType then
@@ -1422,18 +1539,23 @@ class SeparateCompilerVisitor
                end
 
                # check color is in table
-               self.add("if({boxed} == NULL) \{")
-               self.add("{res} = {is_nullable};")
-               self.add("\} else \{")
+               if self.maybe_null(value) then
+                       self.add("if({value} == NULL) \{")
+                       self.add("{res} = {is_nullable};")
+                       self.add("\} else \{")
+               end
+               var value_type_info = self.type_info(value)
                if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                       self.add("{cltype} = HASH({boxed}->type->color, {idtype});")
+                       self.add("{cltype} = HASH({value_type_info}->color, {idtype});")
                end
-               self.add("if({cltype} >= {boxed}->type->table_size) \{")
+               self.add("if({cltype} >= {value_type_info}->table_size) \{")
                self.add("{res} = 0;")
                self.add("\} else \{")
-               self.add("{res} = {boxed}->type->type_table[{cltype}] == {idtype};")
-               self.add("\}")
+               self.add("{res} = {value_type_info}->type_table[{cltype}] == {idtype};")
                self.add("\}")
+               if self.maybe_null(value) then
+                       self.add("\}")
+               end
 
                return res
        end
@@ -1465,8 +1587,12 @@ class SeparateCompilerVisitor
        redef fun class_name_string(value)
        do
                var res = self.get_name("var_class_name")
-               self.add_decl("const char *{res};")
-               self.add("{res} = class_names[{value}->type->id];")
+               self.add_decl("const char* {res};")
+               if value.mtype.ctype == "val*" then
+                       self.add "{res} = {value} == NULL ? \"null\" : {value}->type->name;"
+               else
+                       self.add "{res} = type_{value.mtype.c_name}.name;"
+               end
                return res
        end
 
@@ -1607,11 +1733,11 @@ class SeparateCompilerVisitor
                        else
                                link_unanchored_type(self.frame.mpropdef.mclassdef, mtype)
                                var recv = self.frame.arguments.first
-                               var recv_boxed = self.autobox(recv, self.object_type)
+                               var recv_type_info = self.type_info(recv)
                                if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                                       return self.new_expr("NEW_{mtype.mclass.c_name}({length}, (struct type *) {recv_boxed}->type->unanchored_table->types[HASH({recv_boxed}->type->unanchored_table->mask, {mtype.mclass.mclass_type.const_color})])", mtype)
+                                       return self.new_expr("NEW_{mtype.mclass.c_name}({length}, (struct type *) {recv_type_info}->unanchored_table->types[HASH({recv_type_info}->unanchored_table->mask, {mtype.const_color})])", mtype)
                                else
-                                       return self.new_expr("NEW_{mtype.mclass.c_name}({length}, (struct type *) {recv_boxed}->type->unanchored_table->types[{mtype.mclass.mclass_type.const_color}])", mtype)
+                                       return self.new_expr("NEW_{mtype.mclass.c_name}({length}, (struct type *) {recv_type_info}->unanchored_table->types[{mtype.const_color}])", mtype)
                                end
                        end
                end
@@ -1639,26 +1765,10 @@ class SeparateCompilerVisitor
 
        redef fun calloc_array(ret_type, arguments)
        do
-               var ret = ret_type.as(MGenericType)
-               var compiler = self.compiler.as(SeparateCompiler)
-               compiler.undead_types.add(ret)
                var mclass = self.get_class("ArrayCapable")
-               var nclass = self.get_class("NativeArray")
-
-               if compiler.modelbuilder.toolcontext.opt_generic_tree.value then
-                       var ft = mclass.mclass_type.arguments.first.as(MParameterType)
-                       self.ret(self.new_expr("NEW_{nclass.c_name}({arguments[1]}, (struct type*) livetypes_array__NativeArray[self->type->fts_table->fts[{ft.const_color}]->livecolor])", ret_type))
-               else
-                       var res = nclass.get_mtype(mclass.mclass_type.arguments)
-                       link_unanchored_type(self.frame.mpropdef.mclassdef, res)
-                       var recv = self.frame.arguments.first
-                       var recv_boxed = self.autobox(recv, self.object_type)
-                       if compiler.modelbuilder.toolcontext.opt_phmod_typing.value or compiler.modelbuilder.toolcontext.opt_phand_typing.value then
-                               self.ret(self.new_expr("NEW_{nclass.c_name}({arguments[1]}, (struct type *) {recv_boxed}->type->unanchored_table->types[HASH({recv_boxed}->type->unanchored_table->mask, {nclass.mclass_type.const_color})])", ret_type))
-                       else
-                               self.ret(self.new_expr("NEW_{nclass.c_name}({arguments[1]}, (struct type *) {recv_boxed}->type->unanchored_table->types[{nclass.mclass_type.const_color}])", ret_type))
-                       end
-               end
+               var ft = mclass.mclass_type.arguments.first.as(MParameterType)
+               var res = self.native_array_instance(ft, arguments[1])
+               self.ret(res)
        end
 
        fun link_unanchored_type(mclassdef: MClassDef, mtype: MType) do
@@ -1698,6 +1808,17 @@ redef class MParameterType
        end
 end
 
+redef class MVirtualType
+       redef fun c_name
+       do
+               var res = self.c_name_cache
+               if res != null then return res
+               res = "{self.mproperty.intro.mclassdef.mclass.c_name}_VT{self.mproperty.name}"
+               self.c_name_cache = res
+               return res
+       end
+end
+
 redef class MNullableType
        redef fun c_name
        do