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(* Wasm_of_ocaml compiler
* http://www.ocsigen.org/js_of_ocaml/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, with linking exception;
* either version 2.1 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*)
open Stdlib
let debug = Debug.find "binaryen"
let times = Debug.find "binaryen-times"
let command cmdline =
let cmdline = String.concat ~sep:" " cmdline in
if debug () then Format.eprintf "+ %s@." cmdline;
let res = Sys.command ((if times () then "BINARYEN_PASS_DEBUG=1 " else "") ^ cmdline) in
if res <> 0 then failwith ("the following command terminated unsuccessfully: " ^ cmdline)
let common_options () =
let l =
[ "--enable-gc"
; "--enable-multivalue"
; "--enable-exception-handling"
; "--enable-reference-types"
; "--enable-tail-call"
; "--enable-bulk-memory"
; "--enable-nontrapping-float-to-int"
; "--enable-strings"
]
in
let l = if Config.Flag.pretty () then "-g" :: l else l in
let l = if times () then "--no-validation" :: l else l in
l
let opt_flag flag v =
match v with
| None -> []
| Some v -> [ flag; Filename.quote v ]
type link_input =
{ module_name : string
; file : string
; source_map_file : string option
}
let link ?options ~inputs ~opt_output_sourcemap ~output_file () =
command
("wasm-merge"
:: (common_options ()
@ Option.value ~default:[] options
@ List.flatten
(List.map
~f:(fun { file; module_name; source_map_file } ->
Filename.quote file
:: module_name
::
(match source_map_file with
| None -> []
| Some file -> [ "--input-source-map"; Filename.quote file ]))
inputs)
@ [ "-o"; Filename.quote output_file ]
@ opt_flag "--output-source-map" opt_output_sourcemap))
let generate_dependencies ~dependencies primitives =
Yojson.Basic.to_string
(`List
(StringSet.fold
(fun nm s ->
`Assoc
[ "name", `String ("js:" ^ nm)
; "import", `List [ `String "js"; `String nm ]
]
:: s)
primitives
(Yojson.Basic.Util.to_list (Yojson.Basic.from_string dependencies))))
let filter_unused_primitives primitives usage_file =
let ch = open_in_bin usage_file in
let s = ref primitives in
(try
while true do
let l = input_line ch in
match String.drop_prefix ~prefix:"unused: js:" l with
| Some nm -> s := StringSet.remove (String.trim nm) !s
| None -> ()
done
with End_of_file -> ());
!s
let dead_code_elimination
~dependencies
~opt_input_sourcemap
~input_file
~opt_output_sourcemap
~output_file =
Fs.with_intermediate_file (Filename.temp_file "deps" ".json")
@@ fun deps_file ->
Fs.with_intermediate_file (Filename.temp_file "usage" ".txt")
@@ fun usage_file ->
let primitives = Linker.list_all () in
Fs.write_file ~name:deps_file ~contents:(generate_dependencies ~dependencies primitives);
command
("wasm-metadce"
:: (common_options ()
@ [ "--graph-file"; Filename.quote deps_file; Filename.quote input_file ]
@ opt_flag "--input-source-map" opt_input_sourcemap
@ [ "-o"; Filename.quote output_file ]
@ opt_flag "--output-source-map" opt_output_sourcemap
@ [ ">"; Filename.quote usage_file ]));
filter_unused_primitives primitives usage_file
let optimization_options : Profile.t -> _ = function
| O1 -> [ "-O2"; "--skip-pass=inlining-optimizing"; "--traps-never-happen" ]
| O2 -> [ "-O2"; "--skip-pass=inlining-optimizing"; "--traps-never-happen" ]
| O3 -> [ "-O3"; "--skip-pass=inlining-optimizing"; "--traps-never-happen" ]
let optimize
~profile
?options
~opt_input_sourcemap
~input_file
~opt_output_sourcemap
~output_file
() =
command
("wasm-opt"
:: (common_options ()
@ (match options with
| Some o -> o
| None -> optimization_options profile)
@ [ Filename.quote input_file; "-o"; Filename.quote output_file ])
@ opt_flag "--input-source-map" opt_input_sourcemap
@ opt_flag "--output-source-map" opt_output_sourcemap)
|
