# A visitor on the AST of property definition that generate the C code of a separate compilation process.
class SeparateCompilerVisitor
super AbstractCompilerVisitor
redef type COMPILER: SeparateCompiler
redef fun adapt_signature(m, args)
do
var msignature = m.msignature.(m.mclassdef.bound_mtype, m.mclassdef.bound_mtype, m.mclassdef.mmodule, true)
var recv = args.first
if recv.mtype.ctype != m.mclassdef.mclass.mclass_type.ctype then
args.first = self.autobox(args.first, m.mclassdef.mclass.mclass_type)
end
for i in [0..msignature.arity[ do
var mp = msignature.mparameters[i]
var t = mp.mtype
if mp.is_vararg then
t = args[i+1].mtype
end
args[i+1] = self.autobox(args[i+1], t)
end
end
redef fun unbox_signature_extern(m, args)
do
var msignature = m.msignature.(m.mclassdef.bound_mtype, m.mclassdef.bound_mtype, m.mclassdef.mmodule, true)
if not m.mproperty.is_init and m.is_extern then
args.first = self.unbox_extern(args.first, m.mclassdef.mclass.mclass_type)
end
for i in [0..msignature.arity[ do
var mp = msignature.mparameters[i]
var t = mp.mtype
if mp.is_vararg then
t = args[i+1].mtype
end
if m.is_extern then args[i+1] = self.unbox_extern(args[i+1], t)
end
end
redef fun autobox(value, mtype)
do
if value.mtype == mtype then
return value
else if not value.mtype.is_c_primitive and not mtype.is_c_primitive then
return value
else if not value.mtype.is_c_primitive 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("(uint32_t)((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 not mtype.is_c_primitive then
assert value.mtype == value.mcasttype
if value.mtype.is_tagged then
var res
if value.mtype.name == "Int" then
res = self.new_expr("(val*)({value}<<2|1)", mtype)
else if value.mtype.name == "Char" then
res = self.new_expr("(val*)((long)({value})<<2|2)", mtype)
else if value.mtype.name == "Bool" then
res = self.new_expr("(val*)((long)({value})<<2|3)", mtype)
else
abort
end
# Do not loose type info
res.mcasttype = value.mcasttype
return res
end
var valtype = value.mtype.as(MClassType)
if mtype isa MClassType and mtype.mclass.kind == extern_kind and mtype.mclass.name != "CString" then
valtype = compiler.mainmodule.pointer_type
end
var res = self.new_var(mtype)
# Do not loose type info
res.mcasttype = value.mcasttype
self.require_declaration("BOX_{valtype.c_name}")
self.add("{res} = BOX_{valtype.c_name}({value}); /* autobox from {value.mtype} to {mtype} */")
return res
else if (value.mtype.ctype == "void*" and mtype.ctype == "void*") or
(value.mtype.ctype == "char*" and mtype.ctype == "void*") or
(value.mtype.ctype == "void*" and mtype.ctype == "char*") then
return value
else
# Bad things will appen!
var res = self.new_var(mtype)
self.add("/* {res} left unintialized (cannot convert {value.mtype} to {mtype}) */")
self.add("PRINT_ERROR(\"Cast error: Cannot cast %s to %s.\\n\", \"{value.mtype}\", \"{mtype}\"); fatal_exit(1);")
return res
end
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)
compiler.undead_types.add(mtype)
self.require_declaration("BOX_{valtype.c_name}")
self.add("{res} = BOX_{valtype.c_name}({value}); /* boxing {value.mtype} */")
self.require_declaration("type_{mtype.c_name}")
self.add("{res}->type = &type_{mtype.c_name};")
self.require_declaration("class_{mtype.c_name}")
self.add("{res}->class = &class_{mtype.c_name};")
return res
else
return value
end
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 not value.mtype.is_c_primitive 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 not value.mtype.is_c_primitive 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)
self.require_declaration("type_{value.mtype.c_name}")
return "(&type_{value.mtype.c_name})"
end
end
redef fun compile_callsite(callsite, args)
do
var rta = compiler.runtime_type_analysis
# 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
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.is_c_primitive then
# In order to shortcut the primitive, we need to find the most specific method
# Howverr, because of performance (no flattening), we always work on the realmainmodule
var m = self.compiler.mainmodule
self.compiler.mainmodule = self.compiler.realmainmodule
var res = self.monomorphic_send(mmethod, arguments.first.mcasttype, arguments)
self.compiler.mainmodule = m
return res
end
return table_send(mmethod, arguments, mmethod)
end
# Handle common special cases before doing the effective method invocation
# This methods handle the `==` and `!=` methods and the case of the null receiver.
# Note: a { is open in the generated C, that enclose and protect the effective method invocation.
# Client must not forget to close the } after them.
#
# The value returned is the result of the common special cases.
# If not null, client must compile it with the result of their own effective method invocation.
#
# If `before_send` can shortcut the whole message sending, a dummy `if(0){`
# is generated to cancel the effective method invocation that will follow
# TODO: find a better approach
private fun before_send(mmethod: MMethod, arguments: Array[RuntimeVariable]): nullable RuntimeVariable
do
var res: nullable RuntimeVariable = null
var recv = arguments.first
var consider_null = not self.compiler.modelbuilder.toolcontext.opt_no_check_null.value or mmethod.name == "==" or mmethod.name == "!="
if maybe_null(recv) and consider_null then
self.add("if ({recv} == NULL) \{")
if mmethod.name == "==" or mmethod.name == "is_same_instance" then
res = self.new_var(bool_type)
var arg = arguments[1]
if arg.mcasttype isa MNullableType then
self.add("{res} = ({arg} == NULL);")
else if arg.mcasttype isa MNullType then
self.add("{res} = 1; /* is null */")
else
self.add("{res} = 0; /* {arg.inspect} cannot be null */")
end
else if mmethod.name == "!=" then
res = self.new_var(bool_type)
var arg = arguments[1]
if arg.mcasttype isa MNullableType then
self.add("{res} = ({arg} != NULL);")
else if arg.mcasttype isa MNullType then
self.add("{res} = 0; /* is null */")
else
self.add("{res} = 1; /* {arg.inspect} cannot be null */")
end
else
self.add_abort("Receiver is null")
end
self.add("\} else \{")
else
self.add("\{")
end
if not self.compiler.modelbuilder.toolcontext.opt_no_shortcut_equate.value and (mmethod.name == "==" or mmethod.name == "!=" or mmethod.name == "is_same_instance") then
# Recv is not null, thus if arg is, it is easy to conclude (and respect the invariants)
var arg = arguments[1]
if arg.mcasttype isa MNullType then
if res == null then res = self.new_var(bool_type)
if mmethod.name == "!=" then
self.add("{res} = 1; /* arg is null and recv is not */")
else # `==` and `is_same_instance`
self.add("{res} = 0; /* arg is null but recv is not */")
end
self.add("\}") # closes the null case
self.add("if (0) \{") # what follow is useless, CC will drop it
end
end
return res
end
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++;")
assert arguments.length == mmethod.intro.msignature. + 1 else debug("Invalid arity for {mmethod}. {arguments.length} arguments given.")
var res0 = before_send(mmethod, arguments)
var runtime_function = mmethod.intro.virtual_runtime_function
var msignature = runtime_function.called_signature
adapt_signature(mmethod.intro, arguments)
var res: nullable RuntimeVariable
var ret = msignature.return_mtype
if ret == null then
res = null
else
res = self.new_var(ret)
end
var ss = arguments.join(", ")
var const_color = mentity.const_color
var ress
if res != null then
ress = "{res} = "
else
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
assert res != null
assign(res0,res)
res = res0
end
self.add("\}") # closes the null case
return res
end
redef fun call(mmethoddef, recvtype, arguments)
do
assert arguments.length == mmethoddef.msignature. + 1 else debug("Invalid arity for {mmethoddef}. {arguments.length} arguments given.")
var res: nullable RuntimeVariable
var ret = mmethoddef.msignature.
if ret == null then
res = null
else
ret = ret.resolve_for(mmethoddef.mclassdef.bound_mtype, mmethoddef.mclassdef.bound_mtype, mmethoddef.mclassdef.mmodule, true)
res = self.new_var(ret)
end
if (mmethoddef.is_intern and not compiler.modelbuilder.toolcontext.opt_no_inline_intern.value) or
(compiler.modelbuilder.toolcontext.opt_inline_some_methods.value and mmethoddef.can_inline(self)) then
compiler.modelbuilder.nb_invok_by_inline += 1
if compiler.modelbuilder.toolcontext.opt_invocation_metrics.value then add("count_invoke_by_inline++;")
var frame = new StaticFrame(self, mmethoddef, recvtype, arguments)
frame.returnlabel = self.get_name("RET_LABEL")
frame.returnvar = res
var old_frame = self.frame
self.frame = frame
self.add("\{ /* Inline {mmethoddef} ({arguments.join(",")}) on {arguments.first.inspect} */")
mmethoddef.compile_inside_to_c(self, arguments)
self.add("{frame.returnlabel.as(not null)}:(void)0;")
self.add("\}")
self.frame = old_frame
return res
end
compiler.modelbuilder.nb_invok_by_direct += 1
if compiler.modelbuilder.toolcontext.opt_invocation_metrics.value then add("count_invoke_by_direct++;")
# Autobox arguments
self.adapt_signature(mmethoddef, arguments)
self.require_declaration(mmethoddef.c_name)
if res == null then
self.add("{mmethoddef.c_name}({arguments.join(", ")}); /* Direct call {mmethoddef} on {arguments.first.inspect}*/")
return null
else
self.add("{res} = {mmethoddef.c_name}({arguments.join(", ")});")
end
return res
end
redef fun supercall(m: , recvtype: , arguments: Array[RuntimeVariable]): nullable RuntimeVariable
do
if arguments.first.mcasttype.is_c_primitive then
# In order to shortcut the primitive, we need to find the most specific method
# However, because of performance (no flattening), we always work on the realmainmodule
var main = self.compiler.mainmodule
self.compiler.mainmodule = self.compiler.realmainmodule
var res = self.monomorphic_super_send(m, recvtype, arguments)
self.compiler.mainmodule = main
return res
end
return table_send(m.mproperty, arguments, m)
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 unresolved type must not be resolved
# with the current receiver (ie self).
# Therefore to isolate the resolution from self, a local StaticFrame 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 StaticFrame(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)
# 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
self.require_declaration(a.const_color)
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 not mtype.is_c_primitive and not mtype.is_tagged 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
redef fun read_attribute(a, recv)
do
self.check_recv_notnull(recv)
# What is the declared type of the attribute?
var ret = a.intro.static_mtype.as(not null)
var intromclassdef = a.intro.mclassdef
ret = ret.resolve_for(intromclassdef.bound_mtype, intromclassdef.bound_mtype, intromclassdef.mmodule, true)
if self.compiler.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
self.compiler.attr_read_count += 1
self.add("count_attr_reads++;")
end
self.require_declaration(a.const_color)
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
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_attr_isset.value then
self.add("if (unlikely({res} == NULL)) \{")
self.add_abort("Uninitialized attribute {a.name}")
self.add("\}")
if self.compiler.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
self.compiler.isset_checks_count += 1
self.add("count_isset_checks++;")
end
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} */")
# Check for Uninitialized attribute
if not ret.is_c_primitive and not ret isa MNullableType and not self.compiler.modelbuilder.toolcontext.opt_no_check_attr_isset.value then
self.add("if (unlikely({res} == NULL)) \{")
self.add_abort("Uninitialized attribute {a.name}")
self.add("\}")
if self.compiler.modelbuilder.toolcontext.opt_isset_checks_metrics.value then
self.compiler.isset_checks_count += 1
self.add("count_isset_checks++;")
end
end
return res
end
end
redef fun write_attribute(a, recv, value)
do
self.check_recv_notnull(recv)
# 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)
# Adapt the value to the declared type
value = self.autobox(value, mtype)
self.require_declaration(a.const_color)
if self.compiler.modelbuilder.toolcontext.opt_no_union_attribute.value then
var attr = "{recv}->attrs[{a.const_color}]"
if mtype.is_tagged then
# The attribute is not primitive, thus store it as tagged
var tv = autobox(value, compiler.mainmodule.object_type)
self.add("{attr} = {tv}; /* {a} on {recv.inspect} */")
else if mtype.is_c_primitive 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
self.add("{recv}->attrs[{a.const_color}].{mtype.ctypename} = {value}; /* {a} on {recv.inspect} */")
end
end
# Check that mtype is a live open type
fun hardening_live_open_type(mtype: MType)
do
if not compiler.modelbuilder.toolcontext.opt_hardening.value then return
self.require_declaration(mtype.const_color)
var col = mtype.const_color
self.add("if({col} == -1) \{")
self.add("PRINT_ERROR(\"Resolution of a dead open type: %s\\n\", \"{mtype.to_s.escape_to_c}\");")
self.add_abort("open type dead")
self.add("\}")
end
# Check that mtype it a pointer to a live cast type
fun hardening_cast_type(t: String)
do
if not compiler.modelbuilder.toolcontext.opt_hardening.value then return
add("if({t} == NULL) \{")
add_abort("cast type null")
add("\}")
add("if({t}->id == -1 || {t}->color == -1) \{")
add("PRINT_ERROR(\"Try to cast on a dead cast type: %s\\n\", {t}->name);")
add_abort("cast type dead")
add("\}")
end
redef fun init_instance(mtype)
do
self.require_declaration("NEW_{mtype.mclass.c_name}")
var compiler = self.compiler
if mtype isa MGenericType and mtype.need_anchor then
hardening_live_open_type(mtype)
link_unresolved_type(self.frame..mclassdef, mtype)
var recv = self.frame..first
var recv_type_info = self.type_info(recv)
self.require_declaration(mtype.const_color)
return self.new_expr("NEW_{mtype.mclass.c_name}({recv_type_info}->resolution_table->types[{mtype.const_color}])", mtype)
end
compiler.undead_types.add(mtype)
self.require_declaration("type_{mtype.c_name}")
return self.new_expr("NEW_{mtype.mclass.c_name}(&type_{mtype.c_name})", mtype)
end
redef fun type_test(value, mtype, tag)
do
self.add("/* {value.inspect} isa {mtype} */")
var compiler = self.compiler
var recv = self.frame..first
var recv_type_info = self.type_info(recv)
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"
var ntype = mtype
if ntype isa MNullableType then
ntype = ntype.mtype
accept_null = "1"
end
if value.mcasttype.is_subtype(self.frame..mclassdef.mmodule, self.frame..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
if ntype.need_anchor then
var type_struct = self.get_name("type_struct")
self.add_decl("const struct type* {type_struct};")
# Either with resolution_table with a direct resolution
hardening_live_open_type(mtype)
link_unresolved_type(self.frame..mclassdef, mtype)
self.require_declaration(mtype.const_color)
self.add("{type_struct} = {recv_type_info}->resolution_table->types[{mtype.const_color}];")
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
hardening_cast_type(type_struct)
self.add("{cltype} = {type_struct}->color;")
self.add("{idtype} = {type_struct}->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} = {type_struct}->is_nullable;")
accept_null = is_nullable.to_s
end
else if ntype isa MClassType then
compiler.undead_types.add(mtype)
self.require_declaration("type_{mtype.c_name}")
hardening_cast_type("(&type_{mtype.c_name})")
self.add("{cltype} = type_{mtype.c_name}.color;")
self.add("{idtype} = type_{mtype.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
self.add("PRINT_ERROR(\"NOT YET IMPLEMENTED: type_test(%s, {mtype}).\\n\", \"{value.inspect}\"); fatal_exit(1);")
end
# check color is in table
if maybe_null then
self.add("if({value} == NULL) \{")
self.add("{res} = {accept_null};")
self.add("\} else \{")
end
var value_type_info = self.type_info(value)
self.add("if({cltype} >= {value_type_info}->table_size) \{")
self.add("{res} = 0;")
self.add("\} else \{")
self.add("{res} = {value_type_info}->type_table[{cltype}] == {idtype};")
self.add("\}")
if maybe_null then
self.add("\}")
end
return res
end
redef fun is_same_type_test(value1, value2)
do
var res = self.new_var(bool_type)
# Swap values to be symetric
if value2.mtype.is_c_primitive and not value1.mtype.is_c_primitive then
var tmp = value1
value1 = value2
value2 = tmp
end
if value1.mtype.is_c_primitive then
if value2.mtype == value1.mtype then
self.add("{res} = 1; /* is_same_type_test: compatible types {value1.mtype} vs. {value2.mtype} */")
else if value2.mtype.is_c_primitive then
self.add("{res} = 0; /* is_same_type_test: incompatible types {value1.mtype} vs. {value2.mtype}*/")
else
var mtype1 = value1.mtype.as(MClassType)
self.require_declaration("class_{mtype1.c_name}")
self.add("{res} = ({value2} != NULL) && ({class_info(value2)} == &class_{mtype1.c_name}); /* is_same_type_test */")
end
else
self.add("{res} = ({value1} == {value2}) || ({value1} != NULL && {value2} != NULL && {class_info(value1)} == {class_info(value2)}); /* is_same_type_test */")
end
return res
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\" : {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 != "CString" then
self.add "{res} = \"{value.mtype.as(MClassType).mclass}\";"
else
self.require_declaration("type_{value.mtype.c_name}")
self.add "{res} = type_{value.mtype.c_name}.name;"
end
return res
end
redef fun equal_test(value1, value2)
do
var res = self.new_var(bool_type)
if value2.mtype.is_c_primitive and not value1.mtype.is_c_primitive then
var tmp = value1
value1 = value2
value2 = tmp
end
if value1.mtype.is_c_primitive then
var t1 = value1.mtype
assert t1 == value1.mcasttype
# Fast case: same C type.
if value2.mtype == t1 then
# Same exact C primitive representation.
self.add("{res} = {value1} == {value2};")
return res
end
# Complex case: value2 has a different representation
# Thus, it should be checked if `value2` is type-compatible with `value1`
# This compatibility is done statically if possible and dynamically else
# Conjunction (ands) of dynamic tests according to the static knowledge
var tests = new Array[String]
var t2 = value2.mcasttype
if t2 isa MNullableType then
# The destination type cannot be null
tests.add("({value2} != NULL)")
t2 = t2.mtype
else if t2 isa MNullType then
# `value2` is known to be null, thus incompatible with a primitive
self.add("{res} = 0; /* incompatible types {t1} vs. {t2}*/")
return res
end
if t2 == t1 then
# Same type but different representation.
else if t2.is_c_primitive then
# Type of `value2` is a different primitive type, thus incompatible
self.add("{res} = 0; /* incompatible types {t1} vs. {t2}*/")
return res
else if t1.is_tagged then
# To be equal, `value2` should also be correctly tagged
tests.add("({extract_tag(value2)} == {t1.tag_value})")
else
# To be equal, `value2` should also be boxed with the same class
self.require_declaration("class_{t1.c_name}")
tests.add "({class_info(value2)} == &class_{t1.c_name})"
end
# Compare the unboxed `value2` with `value1`
if tests.not_empty then
self.add "if ({tests.join(" && ")}) \{"
end
self.add "{res} = {self.autobox(value2, t1)} == {value1};"
if tests.not_empty then
self.add "\} else {res} = 0;"
end
return res
end
var maybe_null = true
var test = new Array[String]
var t1 = value1.mcasttype
if t1 isa MNullableType then
test.add("{value1} != NULL")
t1 = t1.mtype
else
maybe_null = false
end
var t2 = value2.mcasttype
if t2 isa MNullableType then
test.add("{value2} != NULL")
t2 = t2.mtype
else
maybe_null = false
end
var incompatible = false
var primitive
if t1.is_c_primitive then
primitive = t1
if t1 == t2 then
# No need to compare class
else if t2.is_c_primitive 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
end
else if t2.is_c_primitive 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
else
primitive = null
end
if incompatible then
if maybe_null then
self.add("{res} = {value1} == {value2}; /* incompatible types {t1} vs. {t2}; but may be NULL*/")
return res
else
self.add("{res} = 0; /* incompatible types {t1} vs. {t2}; cannot be NULL */")
return res
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};")
return res
end
self.add("{res} = {value1} == {value2} || ({test.join(" && ")});")
return res
end
fun (value: RuntimeVariable): Bool
do
var t = value.mcasttype.undecorate
if not t isa MClassType then return false
var k = t.mclass.kind
return k == interface_kind or t.is_c_primitive
end
redef fun array_instance(array, elttype)
do
var nclass = mmodule.native_array_class
var arrayclass = mmodule.array_class
var arraytype = arrayclass.get_mtype([elttype])
var res = self.init_instance(arraytype)
self.add("\{ /* {res} = array_instance Array[{elttype}] */")
var length = self.int_instance(array.length)
var nat = native_array_instance(elttype, length)
for i in [0..array.length[ do
var r = self.autobox(array[i], self.object_type)
self.add("((struct instance_{nclass.c_name}*){nat})->values[{i}] = (val*) {r};")
end
self.send(self.get_property("with_native", arrayclass.intro.bound_mtype), [res, nat, length])
self.add("\}")
return res
end
redef fun native_array_instance(elttype, length)
do
var mtype = mmodule.native_array_type(elttype)
self.require_declaration("NEW_{mtype.mclass.c_name}")
assert mtype isa MGenericType
var compiler = self.compiler
length = autobox(length, compiler.mainmodule.int_type)
if mtype.need_anchor then
hardening_live_open_type(mtype)
link_unresolved_type(self.frame..mclassdef, mtype)
var recv = self.frame..first
var recv_type_info = self.type_info(recv)
self.require_declaration(mtype.const_color)
return self.new_expr("NEW_{mtype.mclass.c_name}((int){length}, {recv_type_info}->resolution_table->types[{mtype.const_color}])", mtype)
end
compiler.undead_types.add(mtype)
self.require_declaration("type_{mtype.c_name}")
return self.new_expr("NEW_{mtype.mclass.c_name}((int){length}, &type_{mtype.c_name})", mtype)
end
redef fun native_array_def(pname, ret_type, arguments)
do
var elttype = arguments.first.mtype
var nclass = mmodule.native_array_class
var recv = "((struct instance_{nclass.c_name}*){arguments[0]})->values"
if pname == "[]" then
# 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 true
else if pname == "[]=" then
self.add("{recv}[{arguments[1]}]={arguments[2]};")
return true
else if pname == "length" then
self.ret(self.new_expr("((struct instance_{nclass.c_name}*){arguments[0]})->length", ret_type.as(not null)))
return true
else if pname == "copy_to" then
var recv1 = "((struct instance_{nclass.c_name}*){arguments[1]})->values"
self.add("memmove({recv1}, {recv}, {arguments[2]}*sizeof({elttype.ctype}));")
return true
else if pname == "memmove" then
# fun memmove(start: Int, length: Int, dest: NativeArray[E], dest_start: Int) is intern do
var recv1 = "((struct instance_{nclass.c_name}*){arguments[3]})->values"
self.add("memmove({recv1}+{arguments[4]}, {recv}+{arguments[1]}, {arguments[2]}*sizeof({elttype.ctype}));")
return true
end
return false
end
redef fun native_array_get(nat, i)
do
var nclass = mmodule.native_array_class
var recv = "((struct instance_{nclass.c_name}*){nat})->values"
# Because the objects are boxed, return the box to avoid unnecessary (or broken) unboxing/reboxing
var res = self.new_expr("{recv}[{i}]", compiler.mainmodule.object_type)
return res
end
redef fun native_array_set(nat, i, val)
do
var nclass = mmodule.native_array_class
var recv = "((struct instance_{nclass.c_name}*){nat})->values"
self.add("{recv}[{i}]={val};")
end
redef fun routine_ref_instance(routine_type, recv, callsite)
do
#debug "ENTER ref_instance"
var mmethoddef = callsite.mpropdef
var = 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.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)
# If the receiver is exact, then there's no need to make a
# polymorph call to the underlying method.
thunk_function.polymorph_call_flag = not my_recv.is_exact
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
var res: RuntimeVariable
if routine_type.need_anchor then
hardening_live_open_type(routine_type)
link_unresolved_type(self.frame..mclassdef, routine_type)
var recv2 = self.frame..first
var recv2_type_info = self.type_info(recv2)
self.require_declaration(routine_type.const_color)
res = self.new_expr("NEW_{base_routine_mclass.c_name}({my_recv}, (nitmethod_t){c_ref}, &class_{routine_mclass.c_name}, {recv2_type_info}->resolution_table->types[{routine_type.const_color}])", routine_type)
else
self.require_declaration("type_{routine_type.c_name}")
compiler.undead_types.add(routine_type)
res = self.new_expr("NEW_{base_routine_mclass.c_name}({my_recv}, (nitmethod_t){c_ref}, &class_{routine_mclass.c_name}, &type_{routine_type.c_name})", routine_type)
end
return res
end
redef fun routine_ref_call(mmethoddef, arguments)
do
#debug "ENTER ref_call"
compiler.modelbuilder.nb_invok_by_tables += 1
if compiler.modelbuilder.toolcontext.opt_invocation_metrics.value then add("count_invoke_by_tables++;")
var nclasses = mmodule.model.get_mclasses_by_name("RoutineRef").as(not null)
var nclass = nclasses.first
var runtime_function = mmethoddef.virtual_runtime_function
# Save the current receiver since adapt_signature will autobox
# the routine receiver which is not the underlying receiver.
# The underlying receiver has already been adapted in the
# `routine_ref_instance` method. Here we just want to adapt the
# rest of the signature, but it's easier to pass the wrong
# receiver in adapt_signature then discards it with `shift`.
#
# ~~~~nitish
# class A; def toto do print "toto"; end
# var a = new A
# var f = &a.toto # `a` is the underlying receiver
# f.call # here `f` is the routine receiver
# ~~~~
var routine = arguments.first
# Retrieve the concrete routine type
var original_recv_c = "(((struct instance_{nclass.c_name}*){arguments[0]})->recv)"
var nitmethod = "(({runtime_function.c_funptrtype})(((struct instance_{nclass.c_name}*){arguments[0]})->method))"
if arguments.length > 1 then
adapt_signature(mmethoddef, arguments)
end
var ret_mtype = runtime_function.called_signature.return_mtype
if ret_mtype != null then
# `ret` is actually always nullable Object. When invoking
# a callref, we don't have the original callsite information.
# Thus, we need to recompute the return type of the callsite.
ret_mtype = resolve_for(ret_mtype, routine)
end
# remove the routine's receiver
arguments.shift
var ss = arguments.join(", ")
# replace the receiver with the original one
if arguments.length > 0 then
ss = "{original_recv_c}, {ss}"
else
ss = original_recv_c
end
arguments.unshift routine # put back the routine ref receiver
add "/* {mmethoddef.mproperty} on {arguments.first.inspect}*/"
var callsite = "{nitmethod}({ss})"
if ret_mtype != null then
var subres = new_expr("{callsite}", ret_mtype)
ret(subres)
else
add("{callsite};")
end
end
fun (mclassdef: MClassDef, mtype: MType) do
assert mtype.need_anchor
var compiler = self.compiler
if not compiler.live_unresolved_types.has_key(self.frame..mclassdef) then
compiler.live_unresolved_types[self.frame..mclassdef] = new HashSet[MType]
end
compiler.live_unresolved_types[self.frame..mclassdef].add(mtype)
end
end
src/compiler/separate_compiler.nit:1254,1--2362,3