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|
(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Pierre Chambart, OCamlPro *)
(* Mark Shinwell and Leo White, Jane Street Europe *)
(* *)
(* Copyright 2013--2016 OCamlPro SAS *)
(* Copyright 2014--2019 Jane Street Group LLC *)
(* *)
(* All rights reserved. This file is distributed under the terms of *)
(* the GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
[@@@ocaml.warning "+a-4-30-40-41-42-66"]
open! Int_replace_polymorphic_compare
let _dump_function_sizes flam ~backend =
let module Backend = (val backend : Backend_intf.S) in
let than = max_int in
Flambda_iterators.iter_on_set_of_closures_of_program flam
~f:(fun ~constant:_ (set_of_closures : Flambda.set_of_closures) ->
Variable.Map.iter (fun fun_var
(function_decl : Flambda.function_declaration) ->
let closure_id = Closure_id.wrap fun_var in
let symbol = Backend.closure_symbol closure_id in
match Inlining_cost.lambda_smaller' function_decl.body ~than with
| Some size -> Format.eprintf "%a %d\n" Symbol.print symbol size
| None -> assert false)
set_of_closures.function_decls.funs)
let lambda_to_flambda ~ppf_dump ~prefixname ~backend ~size
~module_ident ~module_initializer =
Profile.record_call "flambda" (fun () ->
let previous_warning_reporter = !Location.warning_reporter in
let module WarningSet =
Set.Make (struct
type t = Location.t * Warnings.t
let compare = Stdlib.compare
end)
in
let warning_set = ref WarningSet.empty in
let flambda_warning_reporter loc w =
let elt = loc, w in
if not (WarningSet.mem elt !warning_set) then begin
warning_set := WarningSet.add elt !warning_set;
previous_warning_reporter loc w
end else None
in
Misc.protect_refs
[Misc.R (Location.warning_reporter, flambda_warning_reporter)]
(fun () ->
let pass_number = ref 0 in
let round_number = ref 0 in
let check flam =
if !Clflags.flambda_invariant_checks then begin
try Flambda_invariants.check_exn flam
with exn ->
Misc.fatal_errorf "After Flambda pass %d, round %d:@.%s:@.%a"
!pass_number !round_number (Printexc.to_string exn)
Flambda.print_program flam
end
in
let (+-+) flam (name, pass) =
incr pass_number;
if !Clflags.dump_flambda_verbose then begin
Format.fprintf ppf_dump "@.PASS: %s@." name;
Format.fprintf ppf_dump "Before pass %d, round %d:@ %a@."
!pass_number !round_number Flambda.print_program flam;
Format.fprintf ppf_dump "\n@?"
end;
let flam = Profile.record ~accumulate:true name pass flam in
if !Clflags.flambda_invariant_checks then begin
Profile.record ~accumulate:true "check" check flam
end;
flam
in
Profile.record_call ~accumulate:true "middle_end" (fun () ->
let flam =
Profile.record_call ~accumulate:true "closure_conversion"
(fun () ->
module_initializer
|> Closure_conversion.lambda_to_flambda ~backend
~module_ident ~size)
in
if !Clflags.dump_rawflambda
then
Format.fprintf ppf_dump "After closure conversion:@ %a@."
Flambda.print_program flam;
check flam;
let fast_mode flam =
pass_number := 0;
let round = 0 in
flam
+-+ ("lift_lets 1", Lift_code.lift_lets)
+-+ ("Lift_constants", Lift_constants.lift_constants ~backend)
+-+ ("Share_constants", Share_constants.share_constants)
+-+ ("Lift_let_to_initialize_symbol",
Lift_let_to_initialize_symbol.lift ~backend)
+-+ ("Inline_and_simplify",
Inline_and_simplify.run ~never_inline:false ~backend
~prefixname ~round ~ppf_dump)
+-+ ("Remove_unused_closure_vars 2",
Remove_unused_closure_vars.remove_unused_closure_variables
~remove_direct_call_surrogates:false)
+-+ ("Ref_to_variables",
Ref_to_variables.eliminate_ref)
+-+ ("Initialize_symbol_to_let_symbol",
Initialize_symbol_to_let_symbol.run)
in
let rec loop flam =
pass_number := 0;
let round = !round_number in
incr round_number;
if !round_number > (Clflags.rounds ()) then flam
else
flam
(* Beware: [Lift_constants] must be run before any pass that
might duplicate strings. *)
+-+ ("lift_lets 1", Lift_code.lift_lets)
+-+ ("Lift_constants", Lift_constants.lift_constants ~backend)
+-+ ("Share_constants", Share_constants.share_constants)
+-+ ("Remove_unused_program_constructs",
Remove_unused_program_constructs.remove_unused_program_constructs)
+-+ ("Lift_let_to_initialize_symbol",
Lift_let_to_initialize_symbol.lift ~backend)
+-+ ("lift_lets 2", Lift_code.lift_lets)
+-+ ("Remove_unused_closure_vars 1",
Remove_unused_closure_vars.remove_unused_closure_variables
~remove_direct_call_surrogates:false)
+-+ ("Inline_and_simplify",
Inline_and_simplify.run ~never_inline:false ~backend
~prefixname ~round ~ppf_dump)
+-+ ("Remove_unused_closure_vars 2",
Remove_unused_closure_vars.remove_unused_closure_variables
~remove_direct_call_surrogates:false)
+-+ ("lift_lets 3", Lift_code.lift_lets)
+-+ ("Inline_and_simplify noinline",
Inline_and_simplify.run ~never_inline:true ~backend
~prefixname ~round ~ppf_dump)
+-+ ("Remove_unused_closure_vars 3",
Remove_unused_closure_vars.remove_unused_closure_variables
~remove_direct_call_surrogates:false)
+-+ ("Ref_to_variables",
Ref_to_variables.eliminate_ref)
+-+ ("Initialize_symbol_to_let_symbol",
Initialize_symbol_to_let_symbol.run)
|> loop
in
let back_end flam =
flam
+-+ ("Remove_unused_closure_vars",
Remove_unused_closure_vars.remove_unused_closure_variables
~remove_direct_call_surrogates:true)
+-+ ("Lift_constants", Lift_constants.lift_constants ~backend)
+-+ ("Share_constants", Share_constants.share_constants)
+-+ ("Remove_unused_program_constructs",
Remove_unused_program_constructs.remove_unused_program_constructs)
in
let flam =
if !Clflags.classic_inlining then
fast_mode flam
else
loop flam
in
let flam = back_end flam in
(* Check that there aren't any unused "always inline" attributes. *)
Flambda_iterators.iter_apply_on_program flam ~f:(fun apply ->
match apply.inline with
| Default_inline | Never_inline | Hint_inline -> ()
| Always_inline ->
(* CR-someday mshinwell: consider a different error message if
this triggers as a result of the propagation of a user's
attribute into the second part of an over application
(inline_and_simplify.ml line 710). *)
Location.prerr_warning (Debuginfo.to_location apply.dbg)
(Warnings.Inlining_impossible
"[@inlined] attribute was not used on this function \
application (the optimizer did not know what function \
was being applied)")
| Unroll _ ->
Location.prerr_warning (Debuginfo.to_location apply.dbg)
(Warnings.Inlining_impossible
"[@unrolled] attribute was not used on this function \
application (the optimizer did not know what function \
was being applied)"));
if !Clflags.dump_flambda
then
Format.fprintf ppf_dump "End of middle end:@ %a@."
Flambda.print_program flam;
check flam;
(* CR-someday mshinwell: add -d... option for this *)
(* dump_function_sizes flam ~backend; *)
flam))
)
let flambda_raw_clambda_dump_if ppf
({ Flambda_to_clambda. expr = ulambda; preallocated_blocks = _;
structured_constants; exported = _; } as input) =
if !Clflags.dump_rawclambda then
begin
Format.fprintf ppf "@.clambda (before Un_anf):@.";
Printclambda.clambda ppf ulambda;
Symbol.Map.iter (fun sym cst ->
Format.fprintf ppf "%a:@ %a@."
Symbol.print sym
Printclambda.structured_constant cst)
structured_constants
end;
if !Clflags.dump_cmm then Format.fprintf ppf "@.cmm:@.";
input
let lambda_to_clambda ~backend ~prefixname ~ppf_dump
(program : Lambda.program) =
let program =
lambda_to_flambda ~ppf_dump ~prefixname ~backend
~size:program.main_module_block_size
~module_ident:program.module_ident
~module_initializer:program.code
in
let export = Build_export_info.build_transient ~backend program in
let clambda, preallocated_blocks, constants =
Profile.record_call "backend" (fun () ->
(program, export)
|> Flambda_to_clambda.convert ~ppf_dump
|> flambda_raw_clambda_dump_if ppf_dump
|> (fun { Flambda_to_clambda. expr; preallocated_blocks;
structured_constants; exported; } ->
Compilenv.set_export_info exported;
let clambda =
Un_anf.apply ~what:(Compilenv.current_unit_symbol ())
~ppf_dump expr
in
clambda, preallocated_blocks, structured_constants))
in
let constants =
List.map (fun (symbol, definition) ->
{ Clambda.symbol = Linkage_name.to_string (Symbol.label symbol);
exported = true;
definition;
provenance = None;
})
(Symbol.Map.bindings constants)
in
clambda, preallocated_blocks, constants
|
