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")
+
# --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(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)
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
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
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})({arguments.first}->class->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})({arguments.first}->class->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})({arguments.first}->class->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)
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 MEntity
nitlanguage / nit.git / blobdiff