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")
+ # --trampoline-call
+ var opt_trampoline_call = new OptionBool("Use an indirection when calling", "--trampoline-call")
+ # --substitute-monomorph
+ var opt_substitute_monomorph = new OptionBool("Replace monomorph trampoline with direct call", "--substitute-monomorph")
# --inline-coloring-numbers
var opt_inline_coloring_numbers = new OptionBool("Inline colors and ids (semi-global)", "--inline-coloring-numbers")
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, opt_colors_are_symbols, opt_trampoline_call, opt_substitute_monomorph)
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)
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)
+
+ # Replace monomorphic call to a trampoline by a direct call to the virtual implementation
+ if modelbuilder.toolcontext.opt_substitute_monomorph.value then do
+ var m = pd.mproperty
+ if rta == null then
+ # Without RTA, monomorphic means alone (uniq name)
+ if m.mpropdefs.length != 1 then break label
+ else
+ # With RTA, monomorphic means only live methoddef
+ if not rta.live_methoddefs.has(pd) then break label
+ for md in m.mpropdefs do
+ if md != pd and rta.live_methoddefs.has(md) then break label
+ end
+ end
+ # Here the trick, GNU ld can substitute symbols with specific values.
+ var n2 = "CALL_" + m.const_color
+ linker_script.add("{n2} = {r2.c_name};")
+ end label
+ end
end
end
self.mainmodule = old_module
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 call
+ if not compiler.modelbuilder.toolcontext.opt_trampoline_call.value then
+ self.require_declaration(const_color)
+ call = "(({runtime_function.c_funptrtype})({arguments.first}->class->vft[{const_color}]))({ss}) /* {mmethod} on {arguments.first.inspect}*/"
+ else
+ var callsym = "CALL_" + const_color
+ self.require_declaration(callsym)
+ call = "{callsym}({ss}) /* {mmethod} on {arguments.first.inspect}*/"
+ end
if res != null then
self.add("{res} = {call};")
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)
# The C type for the function pointer.
var c_funptrtype: String is lazy do return "{c_ret}(*){c_sig}"
+ # The arguments, as generated by `compile_to_c`
+ private var arguments: Array[RuntimeVariable] is noinit
+
redef fun compile_to_c(compiler)
do
var mmethoddef = self.mmethoddef
comment.append(": {ret}")
end
compiler.provide_declaration(self.c_name, "{sig};")
+ self.arguments = arguments.to_a
v.add_decl("/* method {self} for {comment} */")
v.add_decl("{sig} \{")
v.add("\}")
compiler.names[self.c_name] = "{mmethoddef.full_name} ({mmethoddef.location.file.filename}:{mmethoddef.location.line_start})"
end
+
+ 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