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genswf9.ml
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genswf9.ml
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(*
* Copyright (C)2005-2013 Haxe Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*)
open Ast
open Type
open As3
open As3hl
open Common
type read = Read
type write = Unused__ | Write
type tkind =
| KInt
| KUInt
| KFloat
| KBool
| KType of hl_name
| KDynamic
| KNone
type register = {
rid : int;
rtype : tkind;
mutable rused : bool;
mutable rinit : bool;
mutable rcond : bool;
}
type 'a access =
| VReg of register
| VId of hl_name
| VCast of hl_name * tkind
| VGlobal of hl_name
| VArray
| VScope of hl_slot
| VVolatile of hl_name * tkind option
| VSuper of hl_name
type local =
| LReg of register
| LScope of hl_slot
| LGlobal of hl_name
type code_infos = {
mutable iregs : register DynArray.t;
mutable ipos : int;
mutable istack : int;
mutable imax : int;
mutable iscopes : int;
mutable imaxscopes : int;
mutable iloop : int;
mutable icond : bool;
}
type try_infos = {
tr_pos : int;
tr_end : int;
tr_catch_pos : int;
tr_type : t;
}
type context = {
(* globals *)
com : Common.context;
debugger : bool;
swc : bool;
boot : path;
swf_protected : bool;
need_ctor_skip : bool;
mutable cur_class : tclass;
mutable debug : bool;
mutable last_line : int;
mutable last_file : string;
(* per-function *)
mutable locals : (int,tvar * local) PMap.t;
mutable code : hl_opcode DynArray.t;
mutable infos : code_infos;
mutable trys : try_infos list;
mutable breaks : (unit -> unit) list;
mutable continues : (int -> unit) list;
mutable in_static : bool;
mutable block_vars : (hl_slot * string * hl_name option) list;
mutable try_scope_reg : register option;
mutable for_call : bool;
}
let invalid_expr p = error "Invalid expression" p
let stack_error p = error "Stack error" p
let index_int (x : int) : 'a index = Obj.magic (x + 1)
let index_nz_int (x : int) : 'a index_nz = Obj.magic x
let tid (x : 'a index) : int = Obj.magic x
let ethis = mk (TConst TThis) (mk_mono()) null_pos
let dynamic_prop = HMMultiNameLate [HNPublic (Some "")]
let is_special_compare e1 e2 =
match e1.eexpr, e2.eexpr with
| TConst TNull, _ | _ , TConst TNull -> None
| _ ->
match follow e1.etype, follow e2.etype with
| TInst ({ cl_path = [],"Xml" } as c,_) , _ | _ , TInst ({ cl_path = [],"Xml" } as c,_) -> Some c
| _ -> None
let write ctx op =
DynArray.add ctx.code op;
ctx.infos.ipos <- ctx.infos.ipos + 1;
let s = ctx.infos.istack + As3hlparse.stack_delta op in
ctx.infos.istack <- s;
if s > ctx.infos.imax then ctx.infos.imax <- s;
match op with
| HScope ->
let n = ctx.infos.iscopes + 1 in
ctx.infos.iscopes <- n;
if n > ctx.infos.imaxscopes then ctx.infos.imaxscopes <- n
| HPopScope ->
ctx.infos.iscopes <- ctx.infos.iscopes - 1
| _ ->
()
let jump ctx cond =
let op = DynArray.length ctx.code in
let p = ctx.infos.ipos in
write ctx (HJump (cond,0));
(fun () ->
let delta = ctx.infos.ipos - p in
DynArray.set ctx.code op (HJump (cond,delta))
)
let jump_back ctx =
let p = ctx.infos.ipos in
write ctx HLabel;
(fun cond ->
let delta = p - ctx.infos.ipos in
write ctx (HJump (cond,delta))
)
let real_path = function
| [] , "Int" -> [] , "int"
| [] , "UInt" -> [] , "uint"
| [] , "Float" -> [] , "Number"
| [] , "Bool" -> [] , "Boolean"
| [] , "Enum" -> [] , "Class"
| [] , "EnumValue" -> [] , "Object"
| ["flash";"xml"], "XML" -> [], "XML"
| ["flash";"xml"], "XMLList" -> [], "XMLList"
| ["flash";"utils"], "QName" -> [] , "QName"
| ["flash";"utils"], "Namespace" -> [] , "Namespace"
| ["flash";"utils"], "Object" -> [] , "Object"
| ["flash";"utils"], "Function" -> [] , "Function"
| ["flash"] , "FlashXml__" -> [] , "Xml"
| ["flash";"errors"] , "Error" -> [], "Error"
| ["flash"] , "Vector" -> ["__AS3__";"vec"], "Vector"
| path -> path
let type_path ctx path =
let pack, name = real_path path in
HMPath (pack,name)
let rec follow_basic t =
match t with
| TMono r ->
(match !r with
| Some t -> follow_basic t
| _ -> t)
| TLazy f ->
follow_basic (!f())
| TType ({ t_path = [],"Null" },[tp]) ->
(match follow_basic tp with
| TMono _
| TFun _
| TAbstract ({ a_path = ([],"Int") },[])
| TAbstract ({ a_path = ([],"Float") },[])
| TAbstract ({ a_path = [],"UInt" },[])
| TAbstract ({ a_path = ([],"Bool") },[])
| TInst ({ cl_path = (["haxe"],"Int32") },[])
| TInst ({ cl_path = ([],"Int") },[])
| TInst ({ cl_path = ([],"Float") },[])
| TType ({ t_path = [],"UInt" },[])
| TEnum ({ e_path = ([],"Bool") },[]) -> t
| t -> t)
| TType ({ t_path = ["flash";"utils"],"Object" },[])
| TType ({ t_path = ["flash";"utils"],"Function" },[])
| TType ({ t_path = [],"UInt" },[]) ->
t
| TType (t,tl) ->
follow_basic (apply_params t.t_types tl t.t_type)
| TAbstract (a,pl) when not (Meta.has Meta.CoreType a.a_meta) ->
follow_basic (apply_params a.a_types pl a.a_this)
| _ -> t
let rec type_id ctx t =
match follow_basic t with
| TInst ({ cl_path = ["haxe"],"Int32" },_) ->
type_path ctx ([],"Int")
| TInst ({ cl_path = ["flash"],"Vector" } as c,pl) ->
(match pl with
| [TInst({cl_kind = KTypeParameter _},_)] -> type_path ctx ([],"Object")
| _ -> HMParams (type_path ctx c.cl_path,List.map (type_id ctx) pl))
| TInst (c,_) ->
(match c.cl_kind with
| KTypeParameter l ->
(match l with
| [t] -> type_id ctx t
| _ -> type_path ctx ([],"Object"))
| KExtension (c,params) ->
type_id ctx (TInst (c,params))
| _ ->
type_path ctx c.cl_path)
| TAbstract (a,_) ->
type_path ctx a.a_path
| TFun _ | TType ({ t_path = ["flash";"utils"],"Function" },[]) ->
type_path ctx ([],"Function")
| TType ({ t_path = ([],"UInt") as path },_) ->
type_path ctx path
| TEnum ({ e_path = [],"XmlType"; e_extern = true },_) ->
HMPath ([],"String")
| TEnum (e,_) ->
let rec loop = function
| [] -> type_path ctx e.e_path
| (Meta.FakeEnum,[Ast.EConst (Ast.Ident n),_],_) :: _ -> type_path ctx ([],n)
| _ :: l -> loop l
in
loop e.e_meta
| _ ->
HMPath ([],"Object")
let type_opt ctx t =
match follow_basic t with
| TDynamic _ | TMono _ -> None
| _ -> Some (type_id ctx t)
let type_void ctx t =
match follow t with
| TEnum ({ e_path = [],"Void" },_) | TAbstract ({ a_path = [],"Void" },_) -> Some (HMPath ([],"void"))
| _ -> type_opt ctx t
let classify ctx t =
match follow_basic t with
| TAbstract ({ a_path = [],"Int" },_) | TInst ({ cl_path = [],"Int" },_) | TInst ({ cl_path = ["haxe"],"Int32" },_) ->
KInt
| TAbstract ({ a_path = [],"Float" },_) | TInst ({ cl_path = [],"Float" },_) ->
KFloat
| TAbstract ({ a_path = [],"Bool" },_) | TEnum ({ e_path = [],"Bool" },_) ->
KBool
| TAbstract ({ a_path = [],"Void" },_) | TEnum ({ e_path = [],"Void" },_) ->
KDynamic
| TEnum ({ e_path = [],"XmlType"; e_extern = true },_) ->
KType (HMPath ([],"String"))
| TEnum (e,_) ->
let rec loop = function
| [] -> KType (type_id ctx t)
| (Meta.FakeEnum,[Ast.EConst (Ident n),_],_) :: _ ->
(match n with
| "Int" -> KInt
| "UInt" -> KUInt
| "String" -> KType (HMPath ([],"String"))
| _ -> assert false)
| _ :: l -> loop l
in
loop e.e_meta
| TAbstract ({ a_path = [],"UInt" },_) | TType ({ t_path = [],"UInt" },_) ->
KUInt
| TFun _ | TType ({ t_path = ["flash";"utils"],"Function" },[]) ->
KType (HMPath ([],"Function"))
| TAnon a ->
(match !(a.a_status) with
| Statics _ -> KNone
| _ -> KDynamic)
| TType ({ t_path = ["flash";"utils"],"Object" },[]) ->
KType (HMPath ([],"Object"))
| TInst _ | TAbstract _ ->
KType (type_id ctx t)
| TMono _
| TType _
| TDynamic _ ->
KDynamic
| TLazy _ ->
assert false
(* some field identifiers might cause issues with SWC *)
let reserved i =
match i with
| "int" -> "_" ^ i
| _ -> i
let ident i =
HMPath ([],reserved i)
let as3 p =
HMName (p,HNNamespace "http://adobe.com/AS3/2006/builtin")
let property ctx p t =
match follow t with
| TInst ({ cl_path = [],"Array" },_) ->
(match p with
| "length" -> ident p, Some KInt, false (* UInt in the spec *)
| "map" | "filter" when Common.defined ctx.com Define.NoFlashOverride -> ident (p ^ "HX"), None, true
| "copy" | "insert" | "remove" | "iterator" | "toString" | "map" | "filter" -> ident p , None, true
| _ -> as3 p, None, false);
| TInst ({ cl_path = ["flash"],"Vector" },_) ->
(match p with
| "length" -> ident p, Some KInt, false (* UInt in the spec *)
| "fixed" | "toString" -> ident p, None, false
| "iterator" -> ident p, None, true
| _ -> as3 p, None, false);
| TInst ({ cl_path = [],"String" },_) ->
(match p with
| "length" (* Int in AS3/Haxe *) -> ident p, None, false
| "charCodeAt" when Common.defined ctx.com Define.NoFlashOverride -> ident (p ^ "HX"), None, true
| "charCodeAt" (* use Haxe version *) -> ident p, None, true
| "cca" -> as3 "charCodeAt", None, false
| _ -> as3 p, None, false);
| TInst ({ cl_path = [],"Date" },_) ->
(match p with
| "toString" when Common.defined ctx.com Define.NoFlashOverride -> ident (p ^ "HX"), None, true
| _ -> ident p, None, false)
| TAnon a ->
(match !(a.a_status) with
| Statics { cl_path = [], "Math" } ->
(match p with
| "POSITIVE_INFINITY" | "NEGATIVE_INFINITY" | "NaN" -> ident p, Some KFloat, false
| "floor" | "ceil" | "round" when ctx.for_call -> ident p, Some KInt, false
| "ffloor" | "fceil" | "fround" -> ident (String.sub p 1 (String.length p - 1)), None, false
| _ -> ident p, None, false)
| _ -> ident p, None, false)
| TInst ({ cl_kind = KExtension _ } as c,params) ->
(* cast type when accessing an extension field *)
(try
let f = PMap.find p c.cl_fields in
ident p, Some (classify ctx (apply_params c.cl_types params f.cf_type)), false
with Not_found ->
ident p, None, false)
| TInst ({ cl_interface = true } as c,_) ->
(* lookup the interface in which the field was actually declared *)
let rec loop c =
try
(match PMap.find p c.cl_fields with
| { cf_kind = Var _ } -> raise Exit (* no vars in interfaces in swf9 *)
| _ -> c)
with Not_found ->
let rec loop2 = function
| [] -> raise Not_found
| (i,_) :: l ->
try loop i with Not_found -> loop2 l
in
loop2 c.cl_implements
in
(try
let c = loop c in
let ns = HMName (reserved p, HNNamespace (match c.cl_path with [],n -> n | l,n -> String.concat "." l ^ ":" ^ n)) in
ns, None, false
with Not_found | Exit ->
ident p, None, false)
| _ ->
ident p, None, false
let default_infos() =
{
ipos = 0;
istack = 0;
imax = 0;
iregs = DynArray.create();
iscopes = 0;
imaxscopes = 0;
iloop = -1;
icond = false;
}
let alloc_reg ctx k =
let regs = ctx.infos.iregs in
try
let p = DynArray.index_of (fun r -> not r.rused && k = r.rtype) regs in
let r = DynArray.unsafe_get regs p in
r.rused <- true;
r.rinit <- false;
r
with
Not_found ->
let r = {
rid = DynArray.length regs + 1;
rused = true;
rinit = false;
rtype = k;
rcond = false;
} in
DynArray.add regs r;
r
let coerce ctx t =
(* it would be useful to know if we don't already have
this type on the stack (as detected by the bytecode verifier)...
maybe this get removed at JIT, so it's only useful to reduce codesize
*)
if t <> KNone then
write ctx (match t with
| KInt -> HToInt
| KUInt -> HToUInt
| KFloat -> HToNumber
| KBool -> HToBool
| KType t -> HCast t
| KDynamic -> HAsAny
| KNone -> assert false
)
let set_reg ctx r =
if not r.rinit then begin
r.rinit <- true;
if ctx.infos.icond then r.rcond <- true;
end;
coerce ctx r.rtype;
write ctx (HSetReg r.rid)
let set_reg_dup ctx r =
if not r.rinit then begin
r.rinit <- true;
if ctx.infos.icond then r.rcond <- true;
end;
coerce ctx r.rtype;
write ctx HDup;
write ctx (HSetReg r.rid)
let free_reg ctx r =
r.rused <- false
let pop ctx n =
let rec loop n =
if n > 0 then begin
write ctx HPop;
loop (n - 1)
end
in
if n < 0 then assert false;
let old = ctx.infos.istack in
loop n;
ctx.infos.istack <- old
let is_member ctx name =
let rec loop c =
PMap.mem name c.cl_fields || (match c.cl_super with None -> false | Some (c,_) -> loop c)
in
loop ctx.cur_class
let rename_block_var ctx v =
(* we need to rename it since slots are accessed on a by-name basis *)
let rec loop i =
let name = v.v_name ^ string_of_int i in
if List.exists (fun(_,x,_) -> name = x) ctx.block_vars || is_member ctx name then
loop (i + 1)
else
v.v_name <- name
in
loop 1
let define_local ctx ?(init=false) v p =
let name = v.v_name in
let t = v.v_type in
let l = (if v.v_capture then begin
let topt = type_opt ctx t in
if List.exists (fun (_,x,_) -> name = x) ctx.block_vars || is_member ctx name then rename_block_var ctx v;
let pos = List.length ctx.block_vars + 1 in
ctx.block_vars <- (pos,v.v_name,topt) :: ctx.block_vars;
LScope pos
end else
let r = alloc_reg ctx (classify ctx t) in
if ctx.debug then write ctx (HDebugReg (name, r.rid, ctx.last_line));
r.rinit <- init;
LReg r
) in
ctx.locals <- PMap.add v.v_id (v,l) ctx.locals
let is_set v = (Obj.magic v) = Write
let gen_local_access ctx v p (forset : 'a) : 'a access =
match snd (try PMap.find v.v_id ctx.locals with Not_found -> error ("Unbound variable " ^ v.v_name) p) with
| LReg r ->
VReg r
| LScope n ->
write ctx (HGetScope 1);
VScope n
| LGlobal p ->
if is_set forset then write ctx (HFindProp p);
VGlobal p
let get_local_register ctx v =
match (try snd (PMap.find v.v_id ctx.locals) with Not_found -> LScope 0) with
| LReg r -> Some r
| _ -> None
let rec setvar ctx (acc : write access) kret =
match acc with
| VReg r ->
if kret <> None then
set_reg_dup ctx r
else
set_reg ctx r;
| VGlobal _ | VId _ | VCast _ | VArray | VScope _ when kret <> None ->
let r = alloc_reg ctx (match kret with None -> assert false | Some k -> k) in
set_reg_dup ctx r;
setvar ctx acc None;
write ctx (HReg r.rid);
free_reg ctx r
| VGlobal g ->
write ctx (HSetProp g)
| VId id | VCast (id,_) ->
write ctx (HInitProp id)
| VVolatile (id,_) ->
write ctx (HArray 1);
write ctx (HInitProp id)
| VArray ->
write ctx (HSetProp dynamic_prop);
ctx.infos.istack <- ctx.infos.istack - 1
| VScope n ->
write ctx (HSetSlot n)
| VSuper id ->
write ctx (HSetSuper id)
let getvar ctx (acc : read access) =
match acc with
| VReg r ->
if not r.rinit then begin
r.rinit <- true;
r.rcond <- true;
end;
write ctx (HReg r.rid)
| VId id ->
write ctx (HGetProp id)
| VVolatile (id,t) ->
write ctx (HGetProp id);
write ctx (HSmallInt 0);
write ctx (HGetProp dynamic_prop);
ctx.infos.istack <- ctx.infos.istack - 1;
(match t with
| None -> ()
| Some t -> coerce ctx t)
| VCast (id,t) ->
write ctx (HGetProp id);
coerce ctx t
| VGlobal g ->
write ctx (HGetLex g);
| VArray ->
write ctx (HGetProp dynamic_prop);
ctx.infos.istack <- ctx.infos.istack - 1
| VScope n ->
write ctx (HGetSlot n)
| VSuper id ->
write ctx (HGetSuper id)
let open_block ctx retval =
let old_stack = ctx.infos.istack in
let old_regs = DynArray.map (fun r -> r.rused) ctx.infos.iregs in
let old_locals = ctx.locals in
(fun() ->
if ctx.infos.istack <> old_stack + (if retval then 1 else 0) then assert false;
let rcount = DynArray.length old_regs + 1 in
DynArray.iter (fun r ->
if r.rid < rcount then
r.rused <- DynArray.unsafe_get old_regs (r.rid - 1)
else
r.rused <- false
) ctx.infos.iregs;
ctx.locals <- old_locals;
)
let begin_branch ctx =
if ctx.infos.icond then
(fun() -> ())
else begin
ctx.infos.icond <- true;
(fun() -> ctx.infos.icond <- false)
end
let begin_switch ctx =
let branch = begin_branch ctx in
let switch_index = DynArray.length ctx.code in
let switch_pos = ctx.infos.ipos in
write ctx (HSwitch (0,[]));
let constructs = ref [] in
let max = ref 0 in
let ftag tag =
if tag > !max then max := tag;
constructs := (tag,ctx.infos.ipos) :: !constructs;
in
let fend() =
let cases = Array.create (!max + 1) 1 in
List.iter (fun (tag,pos) -> Array.set cases tag (pos - switch_pos)) !constructs;
DynArray.set ctx.code switch_index (HSwitch (1,Array.to_list cases));
branch();
in
fend, ftag
let debug_infos ?(is_min=true) ctx p =
if ctx.debug then begin
let line = Lexer.get_error_line (if is_min then p else { p with pmin = p.pmax }) in
if ctx.last_file <> p.pfile then begin
write ctx (HDebugFile (if ctx.debugger then Common.get_full_path p.pfile else p.pfile));
ctx.last_file <- p.pfile;
ctx.last_line <- -1;
end;
if ctx.last_line <> line then begin
write ctx (HDebugLine line);
ctx.last_line <- line;
end
end
let gen_constant ctx c t p =
match c with
| TInt i ->
let unsigned = classify ctx t = KUInt in
if Int32.compare i (-128l) > 0 && Int32.compare i 128l < 0 then begin
write ctx (HSmallInt (Int32.to_int i));
if unsigned then write ctx HToUInt;
end else
write ctx (if unsigned then HUIntRef i else HIntRef i)
| TFloat f ->
let f = float_of_string f in
write ctx (HFloat f);
| TString s ->
write ctx (HString (Genswf8.to_utf8 s));
| TBool b ->
write ctx (if b then HTrue else HFalse);
| TNull ->
write ctx HNull;
coerce ctx (classify ctx t)
| TThis ->
write ctx HThis
| TSuper ->
assert false
let end_fun ctx args dparams tret =
{
hlmt_index = 0;
hlmt_ret = type_void ctx tret;
hlmt_args = List.map (fun (v,_) -> type_opt ctx v.v_type) args;
hlmt_native = false;
hlmt_var_args = false;
hlmt_debug_name = None;
hlmt_dparams = dparams;
hlmt_pnames = if ctx.swc || ctx.debugger then Some (List.map (fun (v,_) -> Some v.v_name) args) else None;
hlmt_new_block = false;
hlmt_unused_flag = false;
hlmt_arguments_defined = false;
hlmt_uses_dxns = false;
hlmt_function = None;
}
let begin_fun ctx args tret el stat p =
let old_locals = ctx.locals in
let old_code = ctx.code in
let old_infos = ctx.infos in
let old_trys = ctx.trys in
let old_bvars = ctx.block_vars in
let old_static = ctx.in_static in
let last_line = ctx.last_line in
let old_treg = ctx.try_scope_reg in
ctx.infos <- default_infos();
ctx.code <- DynArray.create();
ctx.trys <- [];
ctx.block_vars <- [];
ctx.in_static <- stat;
ctx.last_line <- -1;
ctx.last_file <- "";
debug_infos ctx p;
let rec find_this e =
match e.eexpr with
| TFunction _ -> ()
| TConst TThis | TConst TSuper -> raise Exit
| _ -> Type.iter find_this e
in
let this_reg = try List.iter find_this el; false with Exit -> true in
ctx.locals <- PMap.foldi (fun _ (v,l) acc ->
match l with
| LReg _ -> acc
| LScope _ -> PMap.add v.v_id (v,LGlobal (ident v.v_name)) acc
| LGlobal _ -> PMap.add v.v_id (v,l) acc
) ctx.locals PMap.empty;
let dparams = ref None in
let make_constant_value r c t =
let v = (match classify ctx t, c with
| _, None -> HVNone
| (KInt | KFloat | KUInt | KBool) as kind, Some c ->
(match c with
| TInt i -> if kind = KUInt then HVUInt i else HVInt i
| TFloat s -> HVFloat (float_of_string s)
| TBool b -> HVBool b
| TNull -> error ("In Flash9, null can't be used as basic type " ^ s_type (print_context()) t) p
| _ -> assert false)
| _, Some TNull -> HVNone
| k, Some c ->
write ctx (HReg r.rid);
write ctx HNull;
let j = jump ctx J3Neq in
gen_constant ctx c t p;
coerce ctx k;
write ctx (HSetReg r.rid);
j();
HVNone
) in
match !dparams with
| None -> if c <> None then dparams := Some [v]
| Some l -> dparams := Some (v :: l)
in
let args, varargs = (match List.rev args with
| (({ v_name = "__arguments__"; v_type = t } as v),_) :: l ->
(match follow t with
| TInst ({ cl_path = ([],"Array") },_) -> List.rev l, Some (v,true)
| _ -> List.rev l, Some(v,false))
| _ ->
args, None
) in
List.iter (fun (v,c) ->
let t = v.v_type in
define_local ctx v ~init:true p;
match gen_local_access ctx v null_pos Write with
| VReg r ->
make_constant_value r c t
| acc ->
let r = alloc_reg ctx (classify ctx t) in
make_constant_value r c t;
write ctx (HReg r.rid);
setvar ctx acc None
) args;
(match varargs with
| None -> ()
| Some (v,_) ->
define_local ctx v ~init:true p;
ignore(alloc_reg ctx (classify ctx v.v_type)));
let dparams = (match !dparams with None -> None | Some l -> Some (List.rev l)) in
let rec loop_try e =
match e.eexpr with
| TFunction _ -> ()
| TTry _ -> raise Exit
| _ -> Type.iter loop_try e
in
ctx.try_scope_reg <- (try List.iter loop_try el; None with Exit -> Some (alloc_reg ctx KDynamic));
(fun () ->
let hasblock = ctx.block_vars <> [] || ctx.trys <> [] in
let code = DynArray.to_list ctx.code in
let extra = (
if hasblock then begin
let scope = (match ctx.try_scope_reg with
| None -> [HScope]
| Some r -> [HDup; HSetReg r.rid; HScope]
) in
HThis :: HScope :: HNewBlock :: scope
end else if this_reg then
[HThis; HScope]
else
[]
) in
(* add dummy registers initialization *)
let extra = extra @ List.concat (List.map (fun r ->
if not r.rcond then
[]
else
let s = [HSetReg r.rid] in
match r.rtype with
| KInt -> HSmallInt 0 :: s
| KUInt -> HSmallInt 0 :: HToUInt :: s
| KFloat -> HNaN :: s
| KBool -> HFalse :: s
| KType t -> HNull :: HAsType t :: s
| KDynamic -> HNull :: HAsAny :: s
| KNone -> HNull :: HAsType (HMPath ([],"Class")) :: s
) (DynArray.to_list ctx.infos.iregs)) in
let delta = List.length extra in
let f = {
hlf_stack_size = (if ctx.infos.imax = 0 && (hasblock || this_reg) then 1 else ctx.infos.imax);
hlf_nregs = DynArray.length ctx.infos.iregs + 1;
hlf_init_scope = 1;
hlf_max_scope = ctx.infos.imaxscopes + 1 + (if hasblock then 2 else if this_reg then 1 else 0);
hlf_code = MultiArray.of_array (Array.of_list (extra @ code));
hlf_trys = Array.of_list (List.map (fun t ->
{
hltc_start = t.tr_pos + delta;
hltc_end = t.tr_end + delta;
hltc_handle = t.tr_catch_pos + delta;
hltc_type = type_opt ctx t.tr_type;
hltc_name = None;
}
) (List.rev ctx.trys));
hlf_locals = Array.of_list (List.map (fun (id,name,t) -> ident name, t, id, false) ctx.block_vars);
} in
let mt = { (end_fun ctx args dparams tret) with
hlmt_var_args = (match varargs with Some (_,true) -> true | _ -> false);
hlmt_arguments_defined = (match varargs with Some (_,false) -> true | _ -> false);
hlmt_new_block = hasblock;
hlmt_function = Some f;
} in
ctx.locals <- old_locals;
ctx.code <- old_code;
ctx.infos <- old_infos;
ctx.trys <- old_trys;
ctx.block_vars <- old_bvars;
ctx.in_static <- old_static;
ctx.last_line <- last_line;
ctx.try_scope_reg <- old_treg;
mt
)
let empty_method ctx p =
let f = begin_fun ctx [] ctx.com.basic.tvoid [] true p in
write ctx HRetVoid;
f()
let begin_loop ctx =
let old_loop = ctx.infos.iloop in
let old_breaks = ctx.breaks in
let old_conts = ctx.continues in
ctx.infos.iloop <- ctx.infos.istack;
ctx.breaks <- [];
ctx.continues <- [];
(fun cont_pos ->
if ctx.infos.istack <> ctx.infos.iloop then assert false;
List.iter (fun j -> j()) ctx.breaks;
List.iter (fun j -> j cont_pos) ctx.continues;
ctx.infos.iloop <- old_loop;
ctx.breaks <- old_breaks;
ctx.continues <- old_conts;
)
let no_value ctx retval =
(* does not push a null but still increment the stack like if
a real value was pushed *)
if retval then ctx.infos.istack <- ctx.infos.istack + 1
let pop_value ctx retval =
(* if we have multiple branches, make sure to forget about previous
branch value *)
if retval then ctx.infos.istack <- ctx.infos.istack - 1
let gen_expr_ref = ref (fun _ _ _ -> assert false)
let gen_expr ctx e retval = (!gen_expr_ref) ctx e retval
let rec gen_access ctx e (forset : 'a) : 'a access =
match e.eexpr with
| TLocal v ->
gen_local_access ctx v e.epos forset
| TField ({ eexpr = TConst TSuper } as e1,f) ->
let f = field_name f in
let id, _, _ = property ctx f e1.etype in
write ctx HThis;
VSuper id
| TEnumParameter (e1,_,i) ->
gen_expr ctx true e1;
write ctx (HGetProp (ident "params"));
write ctx (HSmallInt i);
VArray
| TField (e1,f) ->
let f = field_name f in
let id, k, closure = property ctx f e1.etype in
if closure && not ctx.for_call then error "In Flash9, this method cannot be accessed this way : please define a local function" e1.epos;
(match e1.eexpr with
| TConst (TThis|TSuper) when not ctx.in_static ->
write ctx (HFindProp id)
| _ -> gen_expr ctx true e1);
(match k with
| Some t -> VCast (id,t)
| None ->
match follow e1.etype, follow e.etype with
| _ , TFun _ when not ctx.for_call -> VCast(id,classify ctx e.etype)
| TEnum _, _ -> VId id
| TInst (_,tl), et ->
(* if the return type is one of the type-parameters, then we need to cast it *)
if List.exists (fun t -> follow t == et) tl then
VCast (id, classify ctx et)
else if Codegen.is_volatile e.etype then
VVolatile (id,None)
else
VId id
| TAnon a, _ when (match !(a.a_status) with Statics _ | EnumStatics _ -> true | _ -> false) ->
if Codegen.is_volatile e.etype then
VVolatile (id,None)
else
VId id
| _ ->
if Codegen.is_volatile e.etype then
VVolatile (id,Some (classify ctx e.etype))
else
VCast (id,classify ctx e.etype)
)
| TArray ({ eexpr = TLocal { v_name = "__global__" } },{ eexpr = TConst (TString s) }) ->
let path = parse_path s in
let id = type_path ctx path in
if is_set forset then write ctx HGetGlobalScope;
VGlobal id
| TArray (e,eindex) ->
gen_expr ctx true e;
gen_expr ctx true eindex;
VArray
| TTypeExpr t ->
let id = type_path ctx (t_path t) in
if is_set forset then write ctx HGetGlobalScope;
VGlobal id
| _ ->
invalid_expr e.epos
let gen_expr_twice ctx e =
match e.eexpr with
| TLocal v ->
(match get_local_register ctx v with
| Some r ->
write ctx (HReg r.rid);
write ctx (HReg r.rid);
| None ->
gen_expr ctx true e;
write ctx HDup)
| TConst _ ->
gen_expr ctx true e;
gen_expr ctx true e;
| _ ->
gen_expr ctx true e;
write ctx HDup
let gen_access_rw ctx e : (read access * write access) =
match e.eexpr with
| TArray ({ eexpr = TLocal _ }, { eexpr = TConst _ })
| TArray ({ eexpr = TLocal _ }, { eexpr = TLocal _ })
| TField ({ eexpr = TLocal _ },_)
| TField ({ eexpr = TConst _ },_)
->
let w = gen_access ctx e Write in
let r = gen_access ctx e Read in
r, w
| TArray (e,eindex) ->
let r = (match e.eexpr with TLocal v -> get_local_register ctx v | _ -> None) in
(match r with
| None ->
let r = alloc_reg ctx (classify ctx e.etype) in
gen_expr ctx true e;
set_reg ctx r;
write ctx (HReg r.rid);
gen_expr_twice ctx eindex;
write ctx (HReg r.rid);
write ctx HSwap;
free_reg ctx r;
| Some r ->
write ctx (HReg r.rid);
gen_expr_twice ctx eindex;
write ctx (HReg r.rid);
write ctx HSwap;
);
VArray, VArray
| TField _ ->
let w = gen_access ctx e Write in
write ctx HDup;
Obj.magic w, w
| _ ->
let w = gen_access ctx e Write in
let r = gen_access ctx e Read in
r, w
let rec gen_type ctx t =
match t with
| HMParams (t,tl) ->
write ctx (HGetLex t);
List.iter (gen_type ctx) tl;
write ctx (HApplyType (List.length tl));
| _ ->
write ctx (HGetLex t)
let rec gen_expr_content ctx retval e =
match e.eexpr with
| TConst c ->
gen_constant ctx c e.etype e.epos
| TThrow e ->
ctx.infos.icond <- true;
getvar ctx (VGlobal (type_path ctx (["flash"],"Boot")));
let id = type_path ctx (["flash";"errors"],"Error") in
write ctx (HFindPropStrict id);
write ctx (HConstructProperty (id,0));
setvar ctx (VId (ident "lastError")) None;
gen_expr ctx true e;