Source file specialize_js.ml
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open! Stdlib
open Code
open Flow
let specialize_instr info i =
match i with
| Let (x, Prim (Extern "caml_format_int", [ y; z ])) -> (
match the_string_of info y with
| Some "%d" -> (
match the_int info z with
| Some i -> Let (x, Constant (String (Int32.to_string i)))
| None -> Let (x, Prim (Extern "%caml_format_int_special", [ z ])))
| _ -> i)
| Let (x, Prim (Extern "%caml_format_int_special", [ z ])) -> (
match the_int info z with
| Some i -> Let (x, Constant (String (Int32.to_string i)))
| None -> i)
| Let
( x
, Prim
( Extern (("caml_js_var" | "caml_js_expr" | "caml_pure_js_expr") as prim)
, [ (Pv _ as y) ] ) )
when Config.Flag.safe_string () -> (
match the_string_of info y with
| Some s -> Let (x, Prim (Extern prim, [ Pc (String s) ]))
| _ -> i)
| Let (x, Prim (Extern ("caml_register_named_value" as prim), [ y; z ])) -> (
match the_string_of info y with
| Some s when Primitive.need_named_value s ->
Let (x, Prim (Extern prim, [ Pc (String s); z ]))
| Some _ -> Let (x, Constant (Int 0l))
| None -> i)
| Let (x, Prim (Extern "caml_js_call", [ f; o; a ])) -> (
match the_def_of info a with
| Some (Block (_, a, _)) ->
let a = Array.map a ~f:(fun x -> Pv x) in
Let (x, Prim (Extern "%caml_js_opt_call", f :: o :: Array.to_list a))
| _ -> i)
| Let (x, Prim (Extern "caml_js_fun_call", [ f; a ])) -> (
match the_def_of info a with
| Some (Block (_, a, _)) ->
let a = Array.map a ~f:(fun x -> Pv x) in
Let (x, Prim (Extern "%caml_js_opt_fun_call", f :: Array.to_list a))
| _ -> i)
| Let (x, Prim (Extern "caml_js_meth_call", [ o; m; a ])) -> (
match the_string_of info m with
| Some m when String.is_ascii m -> (
match the_def_of info a with
| Some (Block (_, a, _)) ->
let a = Array.map a ~f:(fun x -> Pv x) in
Let
( x
, Prim
( Extern "%caml_js_opt_meth_call"
, o :: Pc (NativeString m) :: Array.to_list a ) )
| _ -> i)
| _ -> i)
| Let (x, Prim (Extern "caml_js_new", [ c; a ])) -> (
match the_def_of info a with
| Some (Block (_, a, _)) ->
let a = Array.map a ~f:(fun x -> Pv x) in
Let (x, Prim (Extern "%caml_js_opt_new", c :: Array.to_list a))
| _ -> i)
| Let (x, Prim (Extern "caml_js_object", [ a ])) -> (
try
let a =
match the_def_of info a with
| Some (Block (_, a, _)) -> a
| _ -> raise Exit
in
let a =
Array.map a ~f:(fun x ->
match the_def_of info (Pv x) with
| Some (Block (_, [| k; v |], _)) ->
let k =
match the_string_of info (Pv k) with
| Some s when String.is_ascii s -> Pc (NativeString s)
| _ -> raise Exit
in
[ k; Pv v ]
| _ -> raise Exit)
in
Let (x, Prim (Extern "%caml_js_opt_object", List.flatten (Array.to_list a)))
with Exit -> i)
| Let (x, Prim (Extern "caml_js_get", [ o; (Pv _ as f) ])) -> (
match the_native_string_of info f with
| Some s -> Let (x, Prim (Extern "caml_js_get", [ o; Pc (NativeString s) ]))
| _ -> i)
| Let (x, Prim (Extern "caml_js_set", [ o; (Pv _ as f); v ])) -> (
match the_native_string_of info f with
| Some s -> Let (x, Prim (Extern "caml_js_set", [ o; Pc (NativeString s); v ]))
| _ -> i)
| Let (x, Prim (Extern "caml_js_delete", [ o; (Pv _ as f) ])) -> (
match the_native_string_of info f with
| Some s -> Let (x, Prim (Extern "caml_js_delete", [ o; Pc (NativeString s) ]))
| _ -> i)
| Let (x, Prim (Extern ("caml_jsstring_of_string" | "caml_js_from_string"), [ y ])) -> (
match the_string_of info y with
| Some s when String.is_ascii s -> Let (x, Constant (NativeString s))
| _ -> i)
| Let (x, Prim (Extern "%int_mul", [ y; z ])) -> (
match the_int info y, the_int info z with
| Some j, _ when Int32.(abs j < 0x200000l) ->
Let (x, Prim (Extern "%direct_int_mul", [ y; z ]))
| _, Some j when Int32.(abs j < 0x200000l) ->
Let (x, Prim (Extern "%direct_int_mul", [ y; z ]))
| _ -> i)
| Let (x, Prim (Extern "%int_div", [ y; z ])) -> (
match the_int info z with
| Some j when Int32.(j <> 0l) -> Let (x, Prim (Extern "%direct_int_div", [ y; z ]))
| _ -> i)
| Let (x, Prim (Extern "%int_mod", [ y; z ])) -> (
match the_int info z with
| Some j when Int32.(j <> 0l) -> Let (x, Prim (Extern "%direct_int_mod", [ y; z ]))
| _ -> i)
| _ -> i
let specialize_instrs info l =
let rec aux info checks l acc =
match l with
| [] -> List.rev acc
| i :: r -> (
match i with
| Let (x, Prim (Extern "caml_array_get", [ y; z ]))
| Let (x, Prim (Extern "caml_array_get_float", [ y; z ]))
| Let (x, Prim (Extern "caml_array_get_addr", [ y; z ])) ->
let idx =
match the_int info z with
| Some idx -> `Cst idx
| None -> `Var z
in
if List.mem (y, idx) ~set:checks
then
let acc = Let (x, Prim (Extern "caml_array_unsafe_get", [ y; z ])) :: acc in
aux info checks r acc
else
let y' = Code.Var.fresh () in
let acc =
Let (x, Prim (Extern "caml_array_unsafe_get", [ Pv y'; z ]))
:: Let (y', Prim (Extern "caml_check_bound", [ y; z ]))
:: acc
in
aux info ((y, idx) :: checks) r acc
| Let (x, Prim (Extern "caml_array_set", [ y; z; t ]))
| Let (x, Prim (Extern "caml_array_set_float", [ y; z; t ]))
| Let (x, Prim (Extern "caml_array_set_addr", [ y; z; t ])) ->
let idx =
match the_int info z with
| Some idx -> `Cst idx
| None -> `Var z
in
if List.mem (y, idx) ~set:checks
then
let acc =
Let (x, Prim (Extern "caml_array_unsafe_set", [ y; z; t ])) :: acc
in
aux info checks r acc
else
let y' = Code.Var.fresh () in
let acc =
Let (x, Prim (Extern "caml_array_unsafe_set", [ Pv y'; z; t ]))
:: Let (y', Prim (Extern "caml_check_bound", [ y; z ]))
:: acc
in
aux info ((y, idx) :: checks) r acc
| _ ->
let i = specialize_instr info i in
aux info checks r (i :: acc))
in
aux info [] l []
let specialize_all_instrs info p =
let blocks =
Addr.Map.map
(fun block -> { block with Code.body = specialize_instrs info block.body })
p.blocks
in
{ p with blocks }
let f info p = specialize_all_instrs info p
let f_once p =
let rec loop acc l =
match l with
| [] -> List.rev acc
| i :: r -> (
match i with
| Let
( x
, (Prim
( Extern
( "caml_array_set"
| "caml_array_unsafe_set"
| "caml_array_set_float"
| "caml_array_set_addr"
| "caml_array_unsafe_set_float"
| "caml_floatarray_unsafe_set" )
, [ _; _; _ ] ) as p) ) ->
let x' = Code.Var.fork x in
let acc = Let (x', p) :: Let (x, Constant (Int 0l)) :: acc in
loop acc r
| _ -> loop (i :: acc) r)
in
let blocks =
Addr.Map.map (fun block -> { block with Code.body = loop [] block.body }) p.blocks
in
{ p with blocks }