nitc :: separate_erasure_compiler $ ModelBuilder
A model builder knows how to load nit source files and build the associated modelnitc :: separate_erasure_compiler $ ToolContext
Add separate erased compiler specific optionsnitc :: separate_erasure_compiler $ ModelBuilder
A model builder knows how to load nit source files and build the associated modelnitc :: separate_erasure_compiler $ ToolContext
Add separate erased compiler specific optionsSerializable::inspect
to show more useful information
nitc :: modelbuilder
more_collections :: more_collections
Highly specific, but useful, collections-related classes.serialization :: serialization_core
Abstract services to serialize Nit objects to different formatsnitc :: toolcontext
Common command-line tool infrastructure than handle options and error messagescore :: union_find
union–find algorithm using an efficient disjoint-set data structure
# Separate compilation of a Nit program with generic type erasure
module separate_erasure_compiler
intrude import separate_compiler
# Add separate erased compiler specific options
redef class ToolContext
# --erasure
var opt_erasure = new OptionBool("Erase generic types", "--erasure")
# --rta
var opt_rta = new OptionBool("Activate RTA (implicit with --global and --separate)", "--rta")
# --no-check-erasure-cast
var opt_no_check_erasure_cast = new OptionBool("Disable implicit casts on unsafe return with erasure-typing policy (dangerous)", "--no-check-erasure-cast")
redef init
do
super
self.option_context.add_option(self.opt_erasure, self.opt_no_check_erasure_cast, opt_rta)
end
redef fun process_options(args)
do
super
if opt_no_check_all.value then
opt_no_check_erasure_cast.value = true
end
# Temporary disabled. TODO: implement tagging in the erasure compiler.
if opt_erasure.value then
opt_no_tag_primitives.value = true
end
end
var erasure_compiler_phase = new ErasureCompilerPhase(self, null)
end
class ErasureCompilerPhase
super Phase
redef fun process_mainmodule(mainmodule, given_mmodules) do
if not toolcontext.opt_erasure.value then return
var modelbuilder = toolcontext.modelbuilder
var analysis = null
if toolcontext.opt_rta.value then
analysis = modelbuilder.do_rapid_type_analysis(mainmodule)
end
modelbuilder.run_separate_erasure_compiler(mainmodule, analysis)
end
end
redef class ModelBuilder
fun run_separate_erasure_compiler(mainmodule: MModule, runtime_type_analysis: nullable RapidTypeAnalysis)
do
var time0 = get_time
self.toolcontext.info("*** GENERATING C ***", 1)
var compiler = new SeparateErasureCompiler(mainmodule, self, runtime_type_analysis)
compiler.do_compilation
compiler.display_stats
var time1 = get_time
self.toolcontext.info("*** END GENERATING C: {time1-time0} ***", 2)
write_and_make(compiler)
end
end
class SeparateErasureCompiler
super SeparateCompiler
private var class_ids: Map[MClass, Int] is noinit
private var class_colors: Map[MClass, Int] is noinit
protected var vt_colors: Map[MVirtualTypeProp, Int] is noinit
init do
# Class coloring
var poset = mainmodule.flatten_mclass_hierarchy
var mclasses = new HashSet[MClass].from(poset)
var colorer = new POSetColorer[MClass]
colorer.colorize(poset)
class_ids = colorer.ids
class_colors = colorer.colors
class_tables = self.build_class_typing_tables(mclasses)
# lookup vt to build layout with
var vts = new HashMap[MClass, Set[MVirtualTypeProp]]
for mclass in mclasses do
vts[mclass] = new HashSet[MVirtualTypeProp]
for mprop in self.mainmodule.properties(mclass) do
if mprop isa MVirtualTypeProp then
vts[mclass].add(mprop)
end
end
end
# vt coloration
var vt_colorer = new POSetBucketsColorer[MClass, MVirtualTypeProp](poset, colorer.conflicts)
vt_colors = vt_colorer.colorize(vts)
vt_tables = build_vt_tables(mclasses)
end
fun build_vt_tables(mclasses: Set[MClass]): Map[MClass, Array[nullable MPropDef]] do
var tables = new HashMap[MClass, Array[nullable MPropDef]]
for mclass in mclasses do
var table = new Array[nullable MPropDef]
# first, fill table from parents by reverse linearization order
var parents = new Array[MClass]
if mainmodule.flatten_mclass_hierarchy.has(mclass) then
parents = mclass.in_hierarchy(mainmodule).greaters.to_a
self.mainmodule.linearize_mclasses(parents)
end
for parent in parents do
if parent == mclass then continue
for mproperty in self.mainmodule.properties(parent) do
if not mproperty isa MVirtualTypeProp then continue
var color = vt_colors[mproperty]
if table.length <= color then
for i in [table.length .. color[ do
table[i] = null
end
end
for mpropdef in mproperty.mpropdefs do
if mpropdef.mclassdef.mclass == parent then
table[color] = mpropdef
end
end
end
end
# then override with local properties
for mproperty in self.mainmodule.properties(mclass) do
if not mproperty isa MVirtualTypeProp then continue
var color = vt_colors[mproperty]
if table.length <= color then
for i in [table.length .. color[ do
table[i] = null
end
end
for mpropdef in mproperty.mpropdefs do
if mpropdef.mclassdef.mclass == mclass then
table[color] = mpropdef
end
end
end
tables[mclass] = table
end
return tables
end
# Build class tables
fun build_class_typing_tables(mclasses: Set[MClass]): Map[MClass, Array[nullable MClass]] do
var tables = new HashMap[MClass, Array[nullable MClass]]
for mclass in mclasses do
var table = new Array[nullable MClass]
var supers = new Array[MClass]
if mainmodule.flatten_mclass_hierarchy.has(mclass) then
supers = mclass.in_hierarchy(mainmodule).greaters.to_a
end
for sup in supers do
var color = class_colors[sup]
if table.length <= color then
for i in [table.length .. color[ do
table[i] = null
end
end
table[color] = sup
end
tables[mclass] = table
end
return tables
end
redef fun compile_header_structs do
self.header.add_decl("typedef void(*nitmethod_t)(void); /* general C type representing a Nit method. */")
self.compile_header_attribute_structs
self.header.add_decl("struct class \{ int id; const char *name; int box_kind; int color; const struct vts_table *vts_table; const struct type_table *type_table; nitmethod_t vft[]; \}; /* general C type representing a Nit class. */")
self.header.add_decl("struct type_table \{ int size; int table[]; \}; /* colorized type table. */")
self.header.add_decl("struct vts_entry \{ short int is_nullable; const struct class *class; \}; /* link (nullable or not) between the vts and is bound. */")
self.header.add_decl("struct vts_table \{ int dummy; const struct vts_entry vts[]; \}; /* vts list of a C type representation. */")
self.header.add_decl("typedef struct instance \{ const struct class *class; nitattribute_t attrs[1]; \} val; /* general C type representing a Nit instance. */")
end
redef fun compile_class_if_universal(ccinfo, v)
do
var mclass = ccinfo.mclass
var mtype = ccinfo.mtype
var c_name = mclass.c_name
var is_dead = ccinfo.is_dead
if mtype.is_c_primitive or mtype.mclass.name == "Pointer" then
#Build instance struct
self.header.add_decl("struct instance_{c_name} \{")
self.header.add_decl("const struct class *class;")
self.header.add_decl("{mtype.ctype} value;")
self.header.add_decl("\};")
#Build BOX
self.provide_declaration("BOX_{c_name}", "val* BOX_{c_name}({mtype.ctype_extern});")
v.add_decl("/* allocate {mtype} */")
v.add_decl("val* BOX_{mtype.c_name}({mtype.ctype_extern} value) \{")
v.add("struct instance_{c_name}*res = nit_alloc(sizeof(struct instance_{c_name}));")
v.require_declaration("class_{c_name}")
v.add("res->class = &class_{c_name};")
v.add("res->value = value;")
v.add("return (val*)res;")
v.add("\}")
if mtype.mclass.name != "Pointer" then return true
v = new_visitor
self.provide_declaration("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}();")
v.add_decl("/* allocate {mtype} */")
v.add_decl("{mtype.ctype} NEW_{c_name}() \{")
if is_dead then
v.add_abort("{mclass} is DEAD")
else
var res = v.new_named_var(mtype, "self")
res.is_exact = true
v.add("{res} = nit_alloc(sizeof(struct instance_{mtype.c_name}));")
v.require_declaration("class_{c_name}")
v.add("{res}->class = &class_{c_name};")
v.add("((struct instance_{mtype.c_name}*){res})->value = NULL;")
v.add("return {res};")
end
v.add("\}")
return true
else if mclass.name == "NativeArray" then
#Build instance struct
self.header.add_decl("struct instance_{c_name} \{")
self.header.add_decl("const struct class *class;")
self.header.add_decl("int length;")
self.header.add_decl("val* values[];")
self.header.add_decl("\};")
#Build NEW
self.provide_declaration("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}(int length);")
v.add_decl("/* allocate {mtype} */")
v.add_decl("{mtype.ctype} NEW_{c_name}(int length) \{")
var res = v.get_name("self")
v.add_decl("struct instance_{c_name} *{res};")
var mtype_elt = mtype.arguments.first
v.add("{res} = nit_alloc(sizeof(struct instance_{c_name}) + length*sizeof({mtype_elt.ctype}));")
v.require_declaration("class_{c_name}")
v.add("{res}->class = &class_{c_name};")
v.add("{res}->length = length;")
v.add("return (val*){res};")
v.add("\}")
return true
else if mclass.name == "RoutineRef" then
self.header.add_decl("struct instance_{c_name} \{")
self.header.add_decl("const struct class *class;")
self.header.add_decl("val* recv;")
self.header.add_decl("nitmethod_t method;")
self.header.add_decl("\};")
self.provide_declaration("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}(val* recv, nitmethod_t method, const struct class* class);")
v.add_decl("/* allocate {mtype} */")
v.add_decl("{mtype.ctype} NEW_{c_name}(val* recv, nitmethod_t method, const struct class* class)\{")
var res = v.get_name("self")
v.add_decl("struct instance_{c_name} *{res};")
var alloc = v.nit_alloc("sizeof(struct instance_{c_name})", mclass.full_name)
v.add("{res} = {alloc};")
v.add("{res}->class = class;")
v.add("{res}->recv = recv;")
v.add("{res}->method = method;")
v.add("return (val*){res};")
v.add("\}")
return true
else if mtype.mclass.kind == extern_kind and mtype.mclass.name != "CString" then
var pointer_type = mainmodule.pointer_type
self.provide_declaration("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}();")
v.add_decl("/* allocate {mtype} */")
v.add_decl("{mtype.ctype} NEW_{c_name}() \{")
if is_dead then
v.add_abort("{mclass} is DEAD")
else
var res = v.new_named_var(mtype, "self")
res.is_exact = true
v.add("{res} = nit_alloc(sizeof(struct instance_{pointer_type.c_name}));")
#v.add("{res}->type = type;")
v.require_declaration("class_{c_name}")
v.add("{res}->class = &class_{c_name};")
v.add("((struct instance_{pointer_type.c_name}*){res})->value = NULL;")
v.add("return {res};")
end
v.add("\}")
return true
end
return false
end
redef fun compile_class_vft(ccinfo, v)
do
var mclass = ccinfo.mclass
var mtype = ccinfo.mtype
var c_name = mclass.c_name
var is_dead = ccinfo.is_dead
var rta = runtime_type_analysis
# Build class vft
self.provide_declaration("class_{c_name}", "extern const struct class class_{c_name};")
v.add_decl("const struct class class_{c_name} = \{")
v.add_decl("{class_ids[mclass]},")
v.add_decl("\"{mclass.name}\", /* class_name_string */")
v.add_decl("{self.box_kind_of(mclass)}, /* box_kind */")
v.add_decl("{class_colors[mclass]},")
if not is_dead then
if build_class_vts_table(mclass) then
v.require_declaration("vts_table_{c_name}")
v.add_decl("&vts_table_{c_name},")
else
v.add_decl("NULL,")
end
v.add_decl("&type_table_{c_name},")
v.add_decl("\{")
var vft = self.method_tables.get_or_null(mclass)
if vft != null then for i in [0 .. vft.length[ do
var mpropdef = vft[i]
if mpropdef == null then
v.add_decl("NULL, /* empty */")
else
assert mpropdef isa MMethodDef
if rta != null and not rta.live_methoddefs.has(mpropdef) then
v.add_decl("NULL, /* DEAD {mclass.intro_mmodule}:{mclass}:{mpropdef} */")
continue
end
var rf = mpropdef.virtual_runtime_function
v.require_declaration(rf.c_name)
v.add_decl("(nitmethod_t){rf.c_name}, /* pointer to {mpropdef.full_name} */")
end
end
v.add_decl("\}")
end
v.add_decl("\};")
end
protected fun compile_class_type_table(ccinfo: ClassCompilationInfo, v: SeparateCompilerVisitor)
do
var mclass = ccinfo.mclass
var c_name = mclass.c_name
var class_table = self.class_tables[mclass]
# Build class type table
v.add_decl("const struct type_table type_table_{c_name} = \{")
v.add_decl("{class_table.length},")
v.add_decl("\{")
for msuper in class_table do
if msuper == null then
v.add_decl("-1, /* empty */")
else
v.add_decl("{self.class_ids[msuper]}, /* {msuper} */")
end
end
v.add_decl("\}")
v.add_decl("\};")
end
redef fun compile_default_new(ccinfo, v)
do
var mclass = ccinfo.mclass
var mtype = ccinfo.mtype
var c_name = mclass.c_name
var is_dead = ccinfo.is_dead
#Build NEW
self.provide_declaration("NEW_{c_name}", "{mtype.ctype} NEW_{c_name}(void);")
v.add_decl("/* allocate {mtype} */")
v.add_decl("{mtype.ctype} NEW_{c_name}(void) \{")
if is_dead then
v.add_abort("{mclass} is DEAD")
else
var res = v.new_named_var(mtype, "self")
res.is_exact = true
var attrs = self.attr_tables.get_or_null(mclass)
if attrs == null then
v.add("{res} = nit_alloc(sizeof(struct instance));")
else
v.add("{res} = nit_alloc(sizeof(struct instance) + {attrs.length}*sizeof(nitattribute_t));")
end
v.require_declaration("class_{c_name}")
v.add("{res}->class = &class_{c_name};")
if attrs != null then
self.generate_init_attr(v, res, mtype)
v.set_finalizer res
end
v.add("return {res};")
end
v.add("\}")
end
redef fun build_class_compilation_info(mclass)
do
var ccinfo = super
var mtype = ccinfo.mtype
var rta = runtime_type_analysis
var is_dead = false # mclass.kind == abstract_kind or mclass.kind == interface_kind
if not is_dead and rta != null and not rta.live_classes.has(mclass) and not mtype.is_c_primitive and mclass.name != "NativeArray" then
is_dead = true
end
ccinfo.is_dead = is_dead
return ccinfo
end
redef fun compile_class_to_c(mclass: MClass)
do
var ccinfo = build_class_compilation_info(mclass)
var v = new_visitor
v.add_decl("/* runtime class {mclass.c_name} */")
self.provide_declaration("class_{mclass.c_name}", "extern const struct class class_{mclass.c_name};")
v.add_decl("extern const struct type_table type_table_{mclass.c_name};")
self.compile_class_vft(ccinfo, v)
self.compile_class_type_table(ccinfo, v)
if not self.compile_class_if_universal(ccinfo, v) then
self.compile_default_new(ccinfo, v)
end
end
private fun build_class_vts_table(mclass: MClass): Bool do
if self.vt_tables[mclass].is_empty then return false
self.provide_declaration("vts_table_{mclass.c_name}", "extern const struct vts_table vts_table_{mclass.c_name};")
var v = new_visitor
v.add_decl("const struct vts_table vts_table_{mclass.c_name} = \{")
v.add_decl("0, /* dummy */")
v.add_decl("\{")
for vt in self.vt_tables[mclass] do
if vt == null then
v.add_decl("\{-1, NULL\}, /* empty */")
else
var is_null = 0
var bound = retrieve_vt_bound(mclass.intro.bound_mtype, vt.as(MVirtualTypeDef).bound)
while bound isa MNullableType do
bound = retrieve_vt_bound(mclass.intro.bound_mtype, bound.mtype)
is_null = 1
end
var vtclass = bound.as(MClassType).mclass
v.require_declaration("class_{vtclass.c_name}")
v.add_decl("\{{is_null}, &class_{vtclass.c_name}\}, /* {vt} */")
end
end
v.add_decl("\},")
v.add_decl("\};")
return true
end
private fun retrieve_vt_bound(anchor: MClassType, mtype: nullable MType): MType do
if mtype == null then
print "NOT YET IMPLEMENTED: retrieve_vt_bound on null"
abort
end
if mtype isa MVirtualType then
return mtype.anchor_to(mainmodule, anchor)
else if mtype isa MParameterType then
return mtype.anchor_to(mainmodule, anchor)
else
return mtype
end
end
redef fun compile_types
do
compile_color_consts(vt_colors)
end
redef fun new_visitor do return new SeparateErasureCompilerVisitor(self)
# Stats
private var class_tables: Map[MClass, Array[nullable MClass]] is noinit
private var vt_tables: Map[MClass, Array[nullable MPropDef]] is noinit
redef fun display_sizes
do
print "# size of subtyping tables"
print "\ttotal \tholes"
var total = 0
var holes = 0
for t, table in class_tables do
total += table.length
for e in table do if e == null then holes += 1
end
print "\t{total}\t{holes}"
print "# size of resolution tables"
print "\ttotal \tholes"
total = 0
holes = 0
for t, table in vt_tables do
total += table.length
for e in table do if e == null then holes += 1
end
print "\t{total}\t{holes}"
print "# size of methods tables"
print "\ttotal \tholes"
total = 0
holes = 0
for t, table in method_tables do
total += table.length
for e in table do if e == null then holes += 1
end
print "\t{total}\t{holes}"
print "# size of attributes tables"
print "\ttotal \tholes"
total = 0
holes = 0
for t, table in attr_tables do
total += table.length
for e in table do if e == null then holes += 1
end
print "\t{total}\t{holes}"
end
end
class SeparateErasureCompilerVisitor
super SeparateCompilerVisitor
redef fun compile_callsite(callsite, arguments)
do
var res = super
if callsite.erasure_cast and not self.compiler.as(SeparateErasureCompiler).modelbuilder.toolcontext.opt_no_check_erasure_cast.value then
assert res != null
var mtype = callsite.msignature.return_mtype
assert mtype != null
self.add("/* Erasure cast for return {res} isa {mtype} */")
var cond = self.type_test(res, mtype, "erasure")
self.add("if (!{cond}) \{")
#var x = self.class_name_string(res)
#var y = self.class_name_string(arguments.first)
#self.add("PRINT_ERROR(\"Erasure cast: expected {mtype} (self is %s), got %s for {res}\\n\", {y}, {x});")
self.add_abort("Cast failed")
self.add("\}")
end
return res
end
redef fun init_instance(mtype)
do
self.require_declaration("NEW_{mtype.mclass.c_name}")
return self.new_expr("NEW_{mtype.mclass.c_name}()", mtype)
end
redef fun type_test(value, mtype, tag)
do
self.add("/* type test for {value.inspect} isa {mtype} */")
var res = self.new_var(bool_type)
var cltype = self.get_name("cltype")
self.add_decl("int {cltype};")
var idtype = self.get_name("idtype")
self.add_decl("int {idtype};")
var maybe_null = self.maybe_null(value)
var accept_null = "0"
if mtype isa MNullableType then
mtype = mtype.mtype
accept_null = "1"
end
if mtype isa MParameterType then
# Here we get the bound of the the formal type (eh, erasure...)
mtype = mtype.resolve_for(self.frame.mpropdef.mclassdef.bound_mtype, self.frame.mpropdef.mclassdef.bound_mtype, self.frame.mpropdef.mclassdef.mmodule, false)
if mtype isa MNullableType then
mtype = mtype.mtype
accept_null = "1"
end
end
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
return res
end
var class_ptr
if not value.mtype.is_c_primitive then
class_ptr = "{value}->class->"
else
var mclass = value.mtype.as(MClassType).mclass
self.require_declaration("class_{mclass.c_name}")
class_ptr = "class_{mclass.c_name}."
end
if mtype isa MClassType then
self.require_declaration("class_{mtype.mclass.c_name}")
self.add("{cltype} = class_{mtype.mclass.c_name}.color;")
self.add("{idtype} = class_{mtype.mclass.c_name}.id;")
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
else if mtype isa MVirtualType then
var recv = self.frame.arguments.first
var recv_ptr
if not recv.mtype.is_c_primitive then
recv_ptr = "{recv}->class->"
else
var mclass = recv.mtype.as(MClassType).mclass
self.require_declaration("class_{mclass.c_name}")
recv_ptr = "class_{mclass.c_name}."
end
var entry = self.get_name("entry")
self.add("struct vts_entry {entry};")
self.require_declaration(mtype.mproperty.const_color)
self.add("{entry} = {recv_ptr}vts_table->vts[{mtype.mproperty.const_color}];")
self.add("{cltype} = {entry}.class->color;")
self.add("{idtype} = {entry}.class->id;")
if maybe_null and accept_null == "0" then
var is_nullable = self.get_name("is_nullable")
self.add_decl("short int {is_nullable};")
self.add("{is_nullable} = {entry}.is_nullable;")
accept_null = is_nullable.to_s
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
else
self.debug("type_test({value.inspect}, {mtype})")
abort
end
# check color is in table
if maybe_null then
self.add("if({value} == NULL) \{")
self.add("{res} = {accept_null};")
self.add("\} else \{")
end
self.add("if({cltype} >= {class_ptr}type_table->size) \{")
self.add("{res} = 0;")
self.add("\} else \{")
self.add("{res} = {class_ptr}type_table->table[{cltype}] == {idtype};")
self.add("\}")
if maybe_null then
self.add("\}")
end
return res
end
redef fun unbox_extern(value, mtype)
do
if mtype isa MClassType and mtype.mclass.kind == extern_kind and
mtype.mclass.name != "CString" then
var pointer_type = compiler.mainmodule.pointer_type
var res = self.new_var_extern(mtype)
self.add "{res} = ((struct instance_{pointer_type.c_name}*){value})->value; /* unboxing {value.mtype} */"
return res
else
return value
end
end
redef fun box_extern(value, mtype)
do
if mtype isa MClassType and mtype.mclass.kind == extern_kind and
mtype.mclass.name != "CString" then
var valtype = compiler.mainmodule.pointer_type
var res = self.new_var(mtype)
if compiler.runtime_type_analysis != null and not compiler.runtime_type_analysis.live_types.has(value.mtype.as(MClassType)) then
self.add("/*no boxing of {value.mtype}: {value.mtype} is not live! */")
self.add("PRINT_ERROR(\"Dead code executed!\\n\"); fatal_exit(1);")
return res
end
self.require_declaration("BOX_{valtype.c_name}")
self.add("{res} = BOX_{valtype.c_name}({value}); /* boxing {value.mtype} */")
self.require_declaration("class_{mtype.c_name}")
self.add("{res}->class = &class_{mtype.c_name};")
return res
else
return value
end
end
redef fun class_name_string(value)
do
var res = self.get_name("var_class_name")
self.add_decl("const char* {res};")
if not value.mtype.is_c_primitive then
self.add "{res} = {value} == NULL ? \"null\" : {value}->class->name;"
else
self.require_declaration("class_{value.mtype.c_name}")
self.add "{res} = class_{value.mtype.c_name}.name;"
end
return res
end
redef fun native_array_instance(elttype, length)
do
var nclass = mmodule.native_array_class
var mtype = nclass.get_mtype([elttype])
var res = self.new_var(mtype)
res.is_exact = true
self.require_declaration("NEW_{nclass.c_name}")
length = autobox(length, compiler.mainmodule.int_type)
self.add("{res} = NEW_{nclass.c_name}({length});")
return res
end
redef fun routine_ref_instance(routine_type, recv, callsite)
do
var mmethoddef = callsite.mpropdef
#debug "ENTER ref_instance"
var mmethod = mmethoddef.mproperty
# routine_mclass is the specialized one, e.g: FunRef1, ProcRef2, etc..
var routine_mclass = routine_type.mclass
var nclasses = mmodule.model.get_mclasses_by_name("RoutineRef").as(not null)
var base_routine_mclass = nclasses.first
# All routine classes use the same `NEW` constructor.
# However, they have different declared `class` and `type` value.
self.require_declaration("NEW_{base_routine_mclass.c_name}")
var recv_class_cname = recv.mcasttype.as(MClassType).mclass.c_name
var my_recv = recv
if recv.mtype.is_c_primitive then
my_recv = autobox(recv, mmodule.object_type)
end
var my_recv_mclass_type = my_recv.mtype.as(MClassType)
# The class of the concrete Routine must exist (e.g ProcRef0, FunRef0, etc.)
self.require_declaration("class_{routine_mclass.c_name}")
self.require_declaration(mmethoddef.c_name)
var thunk_function = mmethoddef.callref_thunk(my_recv_mclass_type)
var runtime_function = mmethoddef.virtual_runtime_function
var is_c_equiv = runtime_function.msignature.c_equiv(thunk_function.msignature)
var c_ref = thunk_function.c_ref
if is_c_equiv then
var const_color = mmethoddef.mproperty.const_color
c_ref = "{class_info(my_recv)}->vft[{const_color}]"
self.require_declaration(const_color)
else
self.require_declaration(thunk_function.c_name)
compiler.thunk_todo(thunk_function)
end
compiler.thunk_todo(thunk_function)
# Each RoutineRef points to a receiver AND a callref_thunk
var res = self.new_expr("NEW_{base_routine_mclass.c_name}({my_recv}, (nitmethod_t){c_ref}, &class_{routine_mclass.c_name})", routine_type)
#debug "LEAVING ref_instance"
return res
end
end
src/compiler/separate_erasure_compiler.nit:15,1--773,3