var opt_no_union_attribute = new OptionBool("Put primitive attibutes in a box instead of an union", "--no-union-attribute")
# --no-shortcut-equate
var opt_no_shortcut_equate = new OptionBool("Always call == in a polymorphic way", "--no-shortcut-equal")
+ # --no-tag-primitives
+ var opt_no_tag_primitives = new OptionBool("Use only boxes for primitive types", "--no-tag-primitives")
+
# --colors-are-symbols
- var opt_colors_are_symbols = new OptionBool("Store colors as symbols (faster)", "--colors-are-symbols")
+ var opt_colors_are_symbols = new OptionBool("Store colors as symbols (link-boost)", "--colors-are-symbols")
+ # --trampoline-call
+ var opt_trampoline_call = new OptionBool("Use an indirection when calling", "--trampoline-call")
+ # --guard-call
+ var opt_guard_call = new OptionBool("Guard VFT calls with a direct call", "--guard-call")
+ # --substitute-monomorph
+ var opt_substitute_monomorph = new OptionBool("Replace monomorph trampoline with direct call (link-boost)", "--substitute-monomorph")
+ # --link-boost
+ var opt_link_boost = new OptionBool("Enable all link-boost optimizations", "--link-boost")
# --inline-coloring-numbers
var opt_inline_coloring_numbers = new OptionBool("Inline colors and ids (semi-global)", "--inline-coloring-numbers")
var opt_inline_some_methods = new OptionBool("Allow the separate compiler to inline some methods (semi-global)", "--inline-some-methods")
# --direct-call-monomorph
var opt_direct_call_monomorph = new OptionBool("Allow the separate compiler to direct call monomorph sites (semi-global)", "--direct-call-monomorph")
+ # --direct-call-monomorph0
+ var opt_direct_call_monomorph0 = new OptionBool("Allow the separate compiler to direct call monomorph sites (semi-global)", "--direct-call-monomorph0")
# --skip-dead-methods
var opt_skip_dead_methods = new OptionBool("Do not compile dead methods (semi-global)", "--skip-dead-methods")
# --semi-global
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, opt_colors_are_symbols)
+ self.option_context.add_option(self.opt_no_shortcut_equate)
+ self.option_context.add_option(self.opt_no_tag_primitives)
+ self.option_context.add_option(opt_colors_are_symbols, opt_trampoline_call, opt_guard_call, opt_direct_call_monomorph0, opt_substitute_monomorph, opt_link_boost)
self.option_context.add_option(self.opt_inline_coloring_numbers, opt_inline_some_methods, opt_direct_call_monomorph, opt_skip_dead_methods, opt_semi_global)
self.option_context.add_option(self.opt_colo_dead_methods)
self.option_context.add_option(self.opt_tables_metrics)
tc.opt_direct_call_monomorph.value = true
tc.opt_skip_dead_methods.value = true
end
+ if tc.opt_link_boost.value then
+ tc.opt_colors_are_symbols.value = true
+ tc.opt_substitute_monomorph.value = true
+ end
+ if tc.opt_substitute_monomorph.value then
+ tc.opt_trampoline_call.value = true
+ end
end
var separate_compiler_phase = new SeparateCompilerPhase(self, null)
modelbuilder.toolcontext.info("Property coloring", 2)
compiler.new_file("{c_name}.classes")
compiler.do_property_coloring
+ compiler.compile_class_infos
for m in mainmodule.in_importation.greaters do
for mclass in m.intro_mclasses do
#if mclass.kind == abstract_kind or mclass.kind == interface_kind then continue
compiler.compile_nitni_global_ref_functions
compiler.compile_main_function
compiler.compile_finalizer_function
+ compiler.link_mmethods
# compile methods
for m in mainmodule.in_importation.greaters do
self.header.add_decl("struct instance \{ const struct type *type; const struct class *class; nitattribute_t attrs[]; \}; /* general C type representing a Nit instance. */")
self.header.add_decl("struct types \{ int dummy; const struct type *types[]; \}; /* a list types (used for vts, fts and unresolved lists). */")
self.header.add_decl("typedef struct instance val; /* general C type representing a Nit instance. */")
+
+ if not modelbuilder.toolcontext.opt_no_tag_primitives.value then
+ self.header.add_decl("extern const struct class *class_info[];")
+ self.header.add_decl("extern const struct type *type_info[];")
+ end
end
fun compile_header_attribute_structs
r.compile_to_c(self)
var r2 = pd.virtual_runtime_function
if r2 != r then r2.compile_to_c(self)
+
+ # Generate trampolines
+ if modelbuilder.toolcontext.opt_trampoline_call.value then
+ r2.compile_trampolines(self)
+ end
end
end
self.mainmodule = old_module
end
+ # Process all introduced methods and compile some linking information (if needed)
+ fun link_mmethods
+ do
+ if not modelbuilder.toolcontext.opt_substitute_monomorph.value and not modelbuilder.toolcontext.opt_guard_call.value then return
+
+ for mmodule in mainmodule.in_importation.greaters do
+ for cd in mmodule.mclassdefs do
+ for m in cd.intro_mproperties do
+ if not m isa MMethod then continue
+ link_mmethod(m)
+ end
+ end
+ end
+ end
+
+ # Compile some linking information (if needed)
+ fun link_mmethod(m: MMethod)
+ do
+ var n2 = "CALL_" + m.const_color
+
+ # Replace monomorphic call by a direct call to the virtual implementation
+ var md = is_monomorphic(m)
+ if md != null then
+ linker_script.add("{n2} = {md.virtual_runtime_function.c_name};")
+ end
+
+ # If opt_substitute_monomorph then a trampoline is used, else a weak symbol is used
+ if modelbuilder.toolcontext.opt_guard_call.value then
+ var r = m.intro.virtual_runtime_function
+ provide_declaration(n2, "{r.c_ret} {n2}{r.c_sig} __attribute__((weak));")
+ end
+ end
+
+ # The single mmethodef called in case of monomorphism.
+ # Returns nul if dead or polymorphic.
+ fun is_monomorphic(m: MMethod): nullable MMethodDef
+ do
+ var rta = runtime_type_analysis
+ if rta == null then
+ # Without RTA, monomorphic means alone (uniq name)
+ if m.mpropdefs.length == 1 then
+ return m.mpropdefs.first
+ else
+ return null
+ end
+ else
+ # With RTA, monomorphic means only live methoddef
+ var res: nullable MMethodDef = null
+ for md in m.mpropdefs do
+ if rta.live_methoddefs.has(md) then
+ if res != null then return null
+ res = md
+ end
+ end
+ return res
+ end
+ end
+
# Globaly compile the type structure of a live type
fun compile_type_to_c(mtype: MType)
do
if mtype.ctype != "val*" or mtype.mclass.name == "Pointer" then
# Is a primitive type or the Pointer class, not any other extern class
+ if mtype.is_tagged then return
+
#Build instance struct
self.header.add_decl("struct instance_{c_name} \{")
self.header.add_decl("const struct type *type;")
v.add("\}")
end
+ # Compile structures used to map tagged primitive values to their classes and types.
+ # This method also determines which class will be tagged.
+ fun compile_class_infos
+ do
+ if modelbuilder.toolcontext.opt_no_tag_primitives.value then return
+
+ # Note: if you change the tagging scheme, do not forget to update
+ # `autobox` and `extract_tag`
+ var class_info = new Array[nullable MClass].filled_with(null, 4)
+ for t in box_kinds.keys do
+ # Note: a same class can be associated to multiple slots if one want to
+ # use some Huffman coding.
+ if t.name == "Int" then
+ class_info[1] = t
+ else if t.name == "Char" then
+ class_info[2] = t
+ else if t.name == "Bool" then
+ class_info[3] = t
+ else
+ continue
+ end
+ t.mclass_type.is_tagged = true
+ end
+
+ # Compile the table for classes. The tag is used as an index
+ var v = self.new_visitor
+ v.add_decl "const struct class *class_info[4] = \{"
+ for t in class_info do
+ if t == null then
+ v.add_decl("NULL,")
+ else
+ var s = "class_{t.c_name}"
+ v.require_declaration(s)
+ v.add_decl("&{s},")
+ end
+ end
+ v.add_decl("\};")
+
+ # Compile the table for types. The tag is used as an index
+ v.add_decl "const struct type *type_info[4] = \{"
+ for t in class_info do
+ if t == null then
+ v.add_decl("NULL,")
+ else
+ var s = "type_{t.c_name}"
+ v.require_declaration(s)
+ v.add_decl("&{s},")
+ end
+ end
+ v.add_decl("\};")
+ end
+
# Add a dynamic test to ensure that the type referenced by `t` is a live type
fun hardening_live_type(v: VISITOR, t: String)
do
else if value.mtype.ctype == "val*" and mtype.ctype == "val*" then
return value
else if value.mtype.ctype == "val*" then
+ if mtype.is_tagged then
+ if mtype.name == "Int" then
+ return self.new_expr("(long)({value})>>2", mtype)
+ else if mtype.name == "Char" then
+ return self.new_expr("(char)((long)({value})>>2)", mtype)
+ else if mtype.name == "Bool" then
+ return self.new_expr("(short int)((long)({value})>>2)", mtype)
+ else
+ abort
+ end
+ end
return self.new_expr("((struct instance_{mtype.c_name}*){value})->value; /* autounbox from {value.mtype} to {mtype} */", mtype)
else if mtype.ctype == "val*" then
+ if value.mtype.is_tagged then
+ if value.mtype.name == "Int" then
+ return self.new_expr("(val*)({value}<<2|1)", mtype)
+ else if value.mtype.name == "Char" then
+ return self.new_expr("(val*)((long)({value})<<2|2)", mtype)
+ else if value.mtype.name == "Bool" then
+ return self.new_expr("(val*)((long)({value})<<2|3)", mtype)
+ else
+ abort
+ end
+ end
var valtype = value.mtype.as(MClassType)
if mtype isa MClassType and mtype.mclass.kind == extern_kind and mtype.mclass.name != "NativeString" then
valtype = compiler.mainmodule.pointer_type
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.
+ # Returns a C expression containing the tag of the value as a long.
+ #
+ # If the C expression is evaluated to 0, it means there is no tag.
+ # Thus the expression can be used as a condition.
+ fun extract_tag(value: RuntimeVariable): String
+ do
+ assert value.mtype.ctype == "val*"
+ return "((long){value}&3)" # Get the two low bits
+ end
+
+ # Returns a C expression of the runtime class structure of the value.
+ # The point of the method is to work also with primitive types.
+ fun class_info(value: RuntimeVariable): String
+ do
+ if value.mtype.ctype == "val*" then
+ if can_be_primitive(value) and not compiler.modelbuilder.toolcontext.opt_no_tag_primitives.value then
+ var tag = extract_tag(value)
+ return "({tag}?class_info[{tag}]:{value}->class)"
+ end
+ return "{value}->class"
+ else
+ compiler.undead_types.add(value.mtype)
+ self.require_declaration("class_{value.mtype.c_name}")
+ return "(&class_{value.mtype.c_name})"
+ end
+ end
+
+ # Returns a C expression of the runtime type structure of the value.
+ # The point of the method is to work also with primitive types.
fun type_info(value: RuntimeVariable): String
do
if value.mtype.ctype == "val*" then
+ if can_be_primitive(value) and not compiler.modelbuilder.toolcontext.opt_no_tag_primitives.value then
+ var tag = extract_tag(value)
+ return "({tag}?type_info[{tag}]:{value}->type)"
+ end
return "{value}->type"
else
compiler.undead_types.add(value.mtype)
redef fun compile_callsite(callsite, args)
do
var rta = compiler.runtime_type_analysis
- var mmethod = callsite.mproperty
# TODO: Inlining of new-style constructors with initializers
if compiler.modelbuilder.toolcontext.opt_direct_call_monomorph.value and rta != null and callsite.mpropdef.initializers.is_empty then
var tgs = rta.live_targets(callsite)
if tgs.length == 1 then
- # DIRECT CALL
- var res0 = before_send(mmethod, args)
- var res = call(tgs.first, tgs.first.mclassdef.bound_mtype, args)
- if res0 != null then
- assert res != null
- self.assign(res0, res)
- res = res0
- end
- add("\}") # close the before_send
- return res
+ return direct_call(tgs.first, args)
end
end
+ # Shortcut intern methods as they are not usually redefinable
+ if callsite.mpropdef.is_intern and callsite.mproperty.name != "object_id" then
+ # `object_id` is the only redefined intern method, so it can not be directly called.
+ # TODO find a less ugly approach?
+ return direct_call(callsite.mpropdef, args)
+ end
return super
end
+
+ # Fully and directly call a mpropdef
+ #
+ # This method is used by `compile_callsite`
+ private fun direct_call(mpropdef: MMethodDef, args: Array[RuntimeVariable]): nullable RuntimeVariable
+ do
+ var res0 = before_send(mpropdef.mproperty, args)
+ var res = call(mpropdef, mpropdef.mclassdef.bound_mtype, args)
+ if res0 != null then
+ assert res != null
+ self.assign(res0, res)
+ res = res0
+ end
+ add("\}") # close the before_send
+ return res
+ end
redef fun send(mmethod, arguments)
do
if arguments.first.mcasttype.ctype != "val*" then
return res
end
- return table_send(mmethod, arguments, mmethod.const_color)
+ return table_send(mmethod, arguments, mmethod)
end
# Handle common special cases before doing the effective method invocation
return res
end
- private fun table_send(mmethod: MMethod, arguments: Array[RuntimeVariable], const_color: String): nullable RuntimeVariable
+ private fun table_send(mmethod: MMethod, arguments: Array[RuntimeVariable], mentity: MEntity): nullable RuntimeVariable
do
compiler.modelbuilder.nb_invok_by_tables += 1
if compiler.modelbuilder.toolcontext.opt_invocation_metrics.value then add("count_invoke_by_tables++;")
ss.append(", {a}")
end
- self.require_declaration(const_color)
- var call = "(({runtime_function.c_funptrtype})({arguments.first}->class->vft[{const_color}]))({ss}) /* {mmethod} on {arguments.first.inspect}*/"
-
+ var const_color = mentity.const_color
+ var ress
if res != null then
- self.add("{res} = {call};")
+ ress = "{res} = "
else
- self.add("{call};")
+ ress = ""
+ end
+ if mentity isa MMethod and compiler.modelbuilder.toolcontext.opt_direct_call_monomorph0.value then
+ # opt_direct_call_monomorph0 is used to compare the efficiency of the alternative lookup implementation, ceteris paribus.
+ # The difference with the non-zero option is that the monomorphism is looked-at on the mmethod level and not at the callsite level.
+ # TODO: remove this mess and use per callsite service to detect monomorphism in a single place.
+ var md = compiler.is_monomorphic(mentity)
+ if md != null then
+ var callsym = md.virtual_runtime_function.c_name
+ self.require_declaration(callsym)
+ self.add "{ress}{callsym}({ss}); /* {mmethod} on {arguments.first.inspect}*/"
+ else
+ self.require_declaration(const_color)
+ self.add "{ress}(({runtime_function.c_funptrtype})({class_info(arguments.first)}->vft[{const_color}]))({ss}); /* {mmethod} on {arguments.first.inspect}*/"
+ end
+ else if mentity isa MMethod and compiler.modelbuilder.toolcontext.opt_guard_call.value then
+ var callsym = "CALL_" + const_color
+ self.require_declaration(callsym)
+ self.add "if (!{callsym}) \{"
+ self.require_declaration(const_color)
+ self.add "{ress}(({runtime_function.c_funptrtype})({class_info(arguments.first)}->vft[{const_color}]))({ss}); /* {mmethod} on {arguments.first.inspect}*/"
+ self.add "\} else \{"
+ self.add "{ress}{callsym}({ss}); /* {mmethod} on {arguments.first.inspect}*/"
+ self.add "\}"
+ else if mentity isa MMethod and compiler.modelbuilder.toolcontext.opt_trampoline_call.value then
+ var callsym = "CALL_" + const_color
+ self.require_declaration(callsym)
+ self.add "{ress}{callsym}({ss}); /* {mmethod} on {arguments.first.inspect}*/"
+ else
+ self.require_declaration(const_color)
+ self.add "{ress}(({runtime_function.c_funptrtype})({class_info(arguments.first)}->vft[{const_color}]))({ss}); /* {mmethod} on {arguments.first.inspect}*/"
end
if res0 != null then
self.compiler.mainmodule = main
return res
end
- return table_send(m.mproperty, arguments, m.const_color)
+ return table_send(m.mproperty, arguments, m)
end
redef fun vararg_instance(mpropdef, recv, varargs, elttype)
self.add("{res} = ({value2} != NULL) && ({value2}->class == &class_{mtype1.c_name}); /* is_same_type_test */")
end
else
- self.add("{res} = ({value1} == {value2}) || ({value1} != NULL && {value2} != NULL && {value1}->class == {value2}->class); /* is_same_type_test */")
+ self.add("{res} = ({value1} == {value2}) || ({value1} != NULL && {value2} != NULL && {class_info(value1)} == {class_info(value2)}); /* is_same_type_test */")
end
return res
end
var res = self.get_name("var_class_name")
self.add_decl("const char* {res};")
if value.mtype.ctype == "val*" then
- self.add "{res} = {value} == NULL ? \"null\" : {value}->type->name;"
+ self.add "{res} = {value} == NULL ? \"null\" : {type_info(value)}->name;"
else if value.mtype isa MClassType and value.mtype.as(MClassType).mclass.kind == extern_kind and
value.mtype.as(MClassType).name != "NativeString" then
self.add "{res} = \"{value.mtype.as(MClassType).mclass}\";"
self.add("{res} = {value1} == {value2};")
else if value2.mtype.ctype != "val*" then
self.add("{res} = 0; /* incompatible types {value1.mtype} vs. {value2.mtype}*/")
+ else if value1.mtype.is_tagged then
+ self.add("{res} = ({value2} != NULL) && ({self.autobox(value2, value1.mtype)} == {value1});")
else
var mtype1 = value1.mtype.as(MClassType)
self.require_declaration("class_{mtype1.c_name}")
else if t2.ctype != "val*" then
incompatible = true
else if can_be_primitive(value2) then
+ if t1.is_tagged then
+ self.add("{res} = {value1} == {value2};")
+ return res
+ end
+ if not compiler.modelbuilder.toolcontext.opt_no_tag_primitives.value then
+ test.add("(!{extract_tag(value2)})")
+ end
test.add("{value1}->class == {value2}->class")
else
incompatible = true
else if t2.ctype != "val*" then
primitive = t2
if can_be_primitive(value1) then
+ if t2.is_tagged then
+ self.add("{res} = {value1} == {value2};")
+ return res
+ end
+ if not compiler.modelbuilder.toolcontext.opt_no_tag_primitives.value then
+ test.add("(!{extract_tag(value1)})")
+ end
test.add("{value1}->class == {value2}->class")
else
incompatible = true
end
end
if primitive != null then
+ if primitive.is_tagged then
+ self.add("{res} = {value1} == {value2};")
+ return res
+ end
test.add("((struct instance_{primitive.c_name}*){value1})->value == ((struct instance_{primitive.c_name}*){value2})->value")
else if can_be_primitive(value1) and can_be_primitive(value2) then
+ if not compiler.modelbuilder.toolcontext.opt_no_tag_primitives.value then
+ test.add("(!{extract_tag(value1)}) && (!{extract_tag(value2)})")
+ end
test.add("{value1}->class == {value2}->class")
var s = new Array[String]
for t, v in self.compiler.box_kinds do
+ if t.mclass_type.is_tagged then continue
s.add "({value1}->class->box_kind == {v} && ((struct instance_{t.c_name}*){value1})->value == ((struct instance_{t.c_name}*){value2})->value)"
end
+ if s.is_empty then
+ self.add("{res} = {value1} == {value2};")
+ return res
+ end
test.add("({s.join(" || ")})")
else
self.add("{res} = {value1} == {value2};")
var nclass = self.get_class("NativeArray")
var recv = "((struct instance_{nclass.c_name}*){arguments[0]})->values"
if pname == "[]" then
- self.ret(self.new_expr("{recv}[{arguments[1]}]", ret_type.as(not null)))
+ # Because the objects are boxed, return the box to avoid unnecessary (or broken) unboxing/reboxing
+ var res = self.new_expr("{recv}[{arguments[1]}]", compiler.mainmodule.object_type)
+ res.mcasttype = ret_type.as(not null)
+ self.ret(res)
return
else if pname == "[]=" then
self.add("{recv}[{arguments[1]}]={arguments[2]};")
v.add("\}")
compiler.names[self.c_name] = "{mmethoddef.full_name} ({mmethoddef.location.file.filename}:{mmethoddef.location.line_start})"
end
+
+ # Compile the trampolines used to implement late-binding.
+ #
+ # See `opt_trampoline_call`.
+ fun compile_trampolines(compiler: SeparateCompiler)
+ do
+ var recv = self.mmethoddef.mclassdef.bound_mtype
+ var selfvar = arguments.first
+ var ret = called_signature.return_mtype
+
+ if mmethoddef.is_intro and recv.ctype == "val*" then
+ var m = mmethoddef.mproperty
+ var n2 = "CALL_" + m.const_color
+ compiler.provide_declaration(n2, "{c_ret} {n2}{c_sig};")
+ var v2 = compiler.new_visitor
+ v2.add "{c_ret} {n2}{c_sig} \{"
+ v2.require_declaration(m.const_color)
+ var call = "(({c_funptrtype})({selfvar}->class->vft[{m.const_color}]))({arguments.join(", ")});"
+ if ret != null then
+ v2.add "return {call}"
+ else
+ v2.add call
+ end
+
+ v2.add "\}"
+
+ end
+ if mmethoddef.has_supercall and recv.ctype == "val*" then
+ var m = mmethoddef
+ var n2 = "CALL_" + m.const_color
+ compiler.provide_declaration(n2, "{c_ret} {n2}{c_sig};")
+ var v2 = compiler.new_visitor
+ v2.add "{c_ret} {n2}{c_sig} \{"
+ v2.require_declaration(m.const_color)
+ var call = "(({c_funptrtype})({selfvar}->class->vft[{m.const_color}]))({arguments.join(", ")});"
+ if ret != null then
+ v2.add "return {call}"
+ else
+ v2.add call
+ end
+
+ v2.add "\}"
+ end
+ end
+end
+
+redef class MType
+ # Are values of `self` tagged?
+ # If false, it means that the type is not primitive, or is boxed.
+ var is_tagged = false
end
redef class MEntity
nitlanguage / nit.git / blobdiff