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[diderot] Annotation of /branches/vis15/src/compiler/low-to-tree/low-to-tree.sml
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Annotation of /branches/vis15/src/compiler/low-to-tree/low-to-tree.sml

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1 : jhr 3828 (* low-to-tree.sml
2 :     *
3 :     * This code is part of the Diderot Project (http://diderot-language.cs.uchicago.edu)
4 :     *
5 :     * COPYRIGHT (c) 2016 The University of Chicago
6 :     * All rights reserved.
7 :     *)
8 :    
9 :     structure LowToTree : sig
10 :    
11 : jhr 3861 val translate : LowIR.program * TreeIR.target_info -> TreeIR.program
12 : jhr 3828
13 :     end = struct
14 :    
15 : jhr 3834 structure IR = LowIR
16 :     structure V = LowIR.Var
17 :     structure Ty = LowTypes
18 :     structure Op = LowOps
19 : jhr 3835 structure GV = IR.GlobalVar
20 :     structure SV = IR.StateVar
21 : jhr 3834 structure T = TreeIR
22 :     structure TTy = TreeTypes
23 :     structure TOp = TreeOps
24 :     structure TV = TreeVar
25 :     structure TGV = TreeGlobalVar
26 :     structure TSV = TreeStateVar
27 : jhr 3948 structure U = Util
28 : jhr 3828
29 : jhr 3835 (* associate Tree IL globals variables with Low IL variables using properties *)
30 :     local
31 :     val {setFn, peekFn, ...} =
32 :     GV.newProp (fn x => raise Fail(concat["getGlobalVar(", GV.uniqueName x, ")"]))
33 :     in
34 :     fun mkGlobalVar x = (case peekFn x
35 :     of NONE => let
36 :     val x' = TGV.new {
37 :     name = GV.name x,
38 : jhr 3948 ty = U.trType (GV.ty x),
39 : jhr 3835 input = GV.isInput x,
40 :     output = false, (* FIXME: change once we support output globals *)
41 : jhr 3843 varying = GV.isVarying x,
42 :     apiTy = if GV.isInput x
43 : jhr 3948 then SOME(U.toAPIType (GV.ty x))
44 : jhr 3843 else NONE
45 : jhr 3835 }
46 :     in
47 :     setFn (x, x');
48 :     x'
49 :     end
50 :     | SOME x' => x'
51 :     (* end case *))
52 :     end
53 :    
54 :     (* associate Tree IL state variables with Low IL variables using properties *)
55 :     local
56 :     fun mkStateVar x = TSV.new {
57 :     name = SV.name x,
58 : jhr 3948 ty = U.trType (SV.ty x),
59 : jhr 3843 varying = SV.isVarying x,
60 :     apiTy = if (SV.isOutput x)
61 : jhr 3948 then SOME(U.toAPIType (SV.ty x))
62 : jhr 3843 else NONE
63 : jhr 3835 }
64 :     in
65 :     val {getFn = getStateVar, ...} = SV.newProp mkStateVar
66 :     end
67 :    
68 : jhr 3853 (* for variables that are in an equivalence class (see UnifyVars), we use a single
69 :     * TreeIR variable (or vector of variables) to represent them.
70 :     *)
71 :     datatype eq_var_rep = NOEQ | VAR of TV.t | VEC of TV.t list
72 :     local
73 :     val {peekFn : IR.var -> eq_var_rep option, setFn, ...} =
74 :     V.newProp (fn x => raise Fail(V.toString x))
75 : jhr 3856
76 : jhr 3955 fun repOf (env, x) = (case peekFn x
77 : jhr 3856 of SOME b => b
78 :     | NONE => let
79 :     val rep = (case V.ty x
80 : jhr 3948 of Ty.TensorTy[d] => VEC(U.newVectorVars(Env.layoutVec env d))
81 :     | ty => VAR(U.newLocalVar x)
82 : jhr 3856 (* end case *))
83 :     in
84 :     setFn (x, rep);
85 :     rep
86 :     end
87 :     (* end case *))
88 : jhr 3853 in
89 : jhr 3856
90 : jhr 3853 fun eqClassRepOf (env, x) = (case UnifyVars.eqClassOf x
91 : jhr 3955 of SOME x' => repOf (env, x')
92 : jhr 3853 | NONE => NOEQ
93 :     (* end case *))
94 : jhr 3856
95 :     fun useVar env = let
96 :     val useV = Env.useVar env
97 :     in
98 :     fn x => (case UnifyVars.eqClassOf x
99 : jhr 3955 of SOME x' => (case repOf (env, x')
100 : jhr 3856 of VAR x => Env.TREE(T.E_Var x)
101 :     | VEC xs => let
102 :     val Ty.TensorTy[d] = V.ty x
103 :     in
104 :     Env.VEC(Env.layoutVec env d, List.map T.E_Var xs)
105 :     end
106 :     | NOEQ => raise Fail "impossible"
107 :     (* end case *))
108 :     | NONE => useV x
109 :     (* end case *))
110 :     end
111 : jhr 3853 end
112 :    
113 : jhr 3848 fun mkBlock stms = T.Block{locals = ref [], body = stms}
114 : jhr 3834 fun mkIf (x, stms, []) = T.S_IfThen(x, mkBlock stms)
115 :     | mkIf (x, stms1, stms2) = T.S_IfThenElse(x, mkBlock stms1, mkBlock stms2)
116 : jhr 3857 fun mkAssign (x, e) = T.S_Assign(false, x, e)
117 :     fun mkDefn (x, e) = T.S_Assign(true, x, e)
118 : jhr 3889 val zero = T.E_Lit(Literal.Real(RealLit.zero false))
119 : jhr 3828
120 : jhr 4033 (* turn an expression of type TensorTy to one of TensorTyRef *)
121 :     fun mkRef e = (case TreeTypeOf.exp e
122 :     of TTy.TensorTy(shp as _::_) => T.E_Op(TOp.TensorRef shp, [e])
123 :     | _ => e
124 :     (* end case *))
125 :    
126 : jhr 3834 fun cvtScalarTy Ty.BoolTy = TTy.BoolTy
127 :     | cvtScalarTy Ty.IntTy = TTy.IntTy
128 : jhr 3835 | cvtScalarTy (Ty.TensorTy[]) = TTy.realTy
129 : jhr 3834 | cvtScalarTy ty = raise Fail(concat["cvtScalarTy(", Ty.toString ty, ")"])
130 :    
131 : jhr 3948 (* define a new local variable and bind x to it in the environment. *)
132 : jhr 3858 fun newLocal (env, x) = let
133 : jhr 3948 val x' = U.newLocalVar x
134 : jhr 3858 in
135 : jhr 3948 Env.bindSimple (env, x, T.E_Var x');
136 : jhr 3858 x'
137 :     end
138 :    
139 : jhr 3852 (* get a variable's binding as a single argument expression. This means that
140 : jhr 3941 * if x is bound to a vector of expressions, then we need to pack it. Since
141 :     * Pack gets translated to an array, we need to create a new temp.
142 : jhr 3852 *)
143 : jhr 3948 fun singleArg env (x, stms) = (case useVar env x
144 :     of Env.RHS(ty, e) => let
145 :     val tmp = U.newTempVar ("t", ty)
146 :     in
147 :     (T.E_Var tmp, T.S_Assign(true, tmp, e) :: stms)
148 :     end
149 :     | Env.TREE e => (e, stms)
150 : jhr 3941 | Env.VEC(layout, es) => let
151 : jhr 3948 val tmp = U.newTempVar("_arg", TTy.TensorTy[#wid layout])
152 : jhr 3941 in
153 : jhr 3948 (T.E_Var tmp, T.S_Assign(true, tmp, T.E_Pack(layout, es)) :: stms)
154 : jhr 3941 end
155 : jhr 3850 (* end case *))
156 :    
157 : jhr 3948 fun singleArgs (env, args) = let
158 :     val singleArg = singleArg env
159 :     fun doArg (arg, (es, stms)) = let
160 :     val (e', stms') = singleArg (arg, stms)
161 : jhr 3941 in
162 : jhr 3948 (e'::es, stms')
163 : jhr 3941 end
164 :     in
165 : jhr 3948 List.foldr doArg ([], []) args
166 : jhr 3941 end
167 :    
168 : jhr 3948 fun simpleArg env = let
169 :     val useVar = useVar env
170 :     in
171 :     fn (x, stms) => (case useVar x
172 :     of Env.RHS(ty, e) => let
173 :     val tmp = U.newTempVar ("t", ty)
174 :     in
175 :     (T.E_Var tmp, T.S_Assign(true, tmp, e)::stms)
176 :     end
177 :     | Env.TREE e => (e, stms)
178 :     | _ => raise Fail("expected simple binding for " ^ IR.Var.toString x)
179 :     (* end case *))
180 :     end
181 : jhr 3852
182 : jhr 3948 (* translation for simple operations (e.g., scalar operations) *)
183 :     fun simpleArgs (env, args) = let
184 :     val simpleArg = simpleArg env
185 :     fun doArg (arg, (es, stms)) = let
186 :     val (e', stms') = simpleArg (arg, stms)
187 :     in
188 :     (e'::es, stms')
189 :     end
190 :     in
191 :     List.foldr doArg ([], []) args
192 :     end
193 :    
194 :     fun vectorArg (env, x) = let
195 :     fun expToArg (e, stms) = (case V.ty x
196 : jhr 3843 of Ty.TensorTy[d] => let
197 :     val layout = Env.layoutVec env d
198 : jhr 4033 val e = mkRef e
199 : jhr 3843 val es = List.tabulate (
200 :     List.length(#pieces layout),
201 :     fn i => T.E_VLoad(layout, e, i))
202 :     in
203 : jhr 3948 (layout, es, stms)
204 : jhr 3843 end
205 : jhr 3855 | ty => raise Fail(concat[
206 :     "expected ", V.toString x, " : TensorTy[_], but found " ^ Ty.toString ty
207 :     ])
208 : jhr 3843 (* end case *))
209 : jhr 3948 in
210 :     case useVar env x
211 :     of Env.RHS(ty, e) => let
212 :     val tmp = U.newTempVar ("t", ty)
213 :     in
214 :     expToArg (T.E_Var tmp, [T.S_Assign(true, tmp, e)])
215 :     end
216 :     | Env.TREE e => expToArg(e, [])
217 :     | Env.VEC(layout, es) => (layout, es, [])
218 :     (* end case *)
219 :     end
220 : jhr 3834
221 :     (* convert a list of LowIR variables, each of which are mapped
222 :     * to lists of of vector expressions, to a list of list of expressions
223 :     *)
224 :     fun vectorArgs (env, []) = raise Fail "unexpected empty argument list"
225 :     | vectorArgs (env, x::xs) = let
226 : jhr 3948 val (layout, exps, stms) = vectorArg (env, x)
227 :     fun doArg (x, (argLists, stms)) = let
228 :     val (_, exps, stms') = vectorArg (env, x)
229 : jhr 3834 in
230 : jhr 3948 (ListPair.mapEq (op ::) (exps, argLists), stms'@stms)
231 : jhr 3834 end
232 : jhr 3948 val (argLists, stms) = List.foldl doArg ([exps], stms) xs
233 : jhr 3834 in
234 : jhr 3948 (layout, List.map List.rev argLists, List.rev stms)
235 : jhr 3834 end
236 :    
237 : jhr 3948 (* translation for simple vector operations *)
238 :     fun trVecOp (env, rator, args) = let
239 :     val useVar = useVar env
240 :     fun doArg (x, (es, stms)) = (case useVar x
241 :     of Env.RHS(ty, e) => let
242 :     val tmp = U.newTempVar ("t", ty)
243 :     in
244 :     (T.E_Var tmp :: es, T.S_Assign(true, tmp, e)::stms)
245 :     end
246 :     | Env.TREE e => (e::es, stms)
247 :     | _ => raise Fail("expected simple binding for " ^ IR.Var.toString x)
248 :     (* end case *))
249 :     val (args, stms) = List.foldr doArg ([], []) args
250 :     in
251 :     (Env.TREE(T.E_Op(rator, args)), stms)
252 :     end
253 :    
254 : jhr 3852 fun trOp (env, srcRator, args) = let
255 : jhr 4039 fun bindTREE rator = let
256 : jhr 3948 val (args, stms) = simpleArgs (env, args)
257 :     in
258 :     (Env.TREE(T.E_Op(rator, args)), stms)
259 :     end
260 :     fun bindRHS (ty, rator) = let
261 :     val (args, stms) = simpleArgs (env, args)
262 :     in
263 :     (Env.RHS(ty, T.E_Op(rator, args)), stms)
264 :     end
265 : jhr 3835 fun bindVOp rator = let
266 : jhr 3948 val (layout, argss, stms) = vectorArgs (env, args)
267 : jhr 3880 fun mkArgs (_, [], []) = []
268 :     | mkArgs (w, p::ps, args::argss) =
269 :     T.E_Op(rator(w, p), args) :: mkArgs (w-p, ps, argss)
270 :     val exps = mkArgs (#wid layout, #pieces layout, argss)
271 : jhr 3829 in
272 : jhr 3948 (Env.VEC(layout, exps), stms)
273 : jhr 3829 end
274 : jhr 3880 fun mkArgs f ({wid, pieces, ...} : TTy.vec_layout, args) = let
275 :     fun mk (w, [p], [x]) = [T.E_Op(f(w, p, x))]
276 :     | mk (w, p::ps, x::xs) = T.E_Op(f(p, p, x)) :: mk (w-p, ps, xs)
277 :     | mk _ = raise Fail "mkArgs: arity mismatch"
278 :     in
279 :     mk (wid, pieces, args)
280 :     end
281 : jhr 3829 in
282 : jhr 3834 case srcRator
283 : jhr 4039 of Op.IAdd => bindTREE TOp.IAdd
284 :     | Op.ISub => bindTREE TOp.ISub
285 :     | Op.IMul => bindTREE TOp.IMul
286 :     | Op.IDiv => bindTREE TOp.IDiv
287 :     | Op.IMod => bindTREE TOp.IMod
288 :     | Op.INeg => bindTREE TOp.INeg
289 : jhr 3843 (* QUESTION: should we just use VAdd 1, etc ?*)
290 : jhr 4039 | Op.RAdd => bindTREE TOp.RAdd
291 :     | Op.RSub => bindTREE TOp.RSub
292 :     | Op.RMul => bindTREE TOp.RMul
293 :     | Op.RDiv => bindTREE TOp.RDiv
294 :     | Op.RNeg => bindTREE TOp.RNeg
295 :     | Op.LT ty => bindTREE (TOp.LT (cvtScalarTy ty))
296 :     | Op.LTE ty => bindTREE (TOp.LTE (cvtScalarTy ty))
297 :     | Op.EQ ty => bindTREE (TOp.EQ (cvtScalarTy ty))
298 :     | Op.NEQ ty => bindTREE (TOp.NEQ (cvtScalarTy ty))
299 :     | Op.GT ty => bindTREE (TOp.GT (cvtScalarTy ty))
300 :     | Op.GTE ty => bindTREE (TOp.GTE (cvtScalarTy ty))
301 :     | Op.Not => bindTREE TOp.Not
302 :     | Op.Abs ty => bindTREE (TOp.Abs (cvtScalarTy ty))
303 :     | Op.Max ty => bindTREE (TOp.Max (cvtScalarTy ty))
304 :     | Op.Min ty => bindTREE (TOp.Min (cvtScalarTy ty))
305 :     | Op.RClamp => bindTREE TOp.RClamp
306 :     | Op.RLerp => bindTREE TOp.RLerp
307 : jhr 3834 | Op.VAdd _ => bindVOp TOp.VAdd
308 :     | Op.VSub _ => bindVOp TOp.VSub
309 : jhr 3855 | Op.VScale _ => let
310 :     val [s, v] = args
311 : jhr 3948 val (s, stms) = simpleArg env (s, [])
312 :     val (layout, vs, stms') = vectorArg (env, v)
313 : jhr 3880 val exps = mkArgs (fn (w, p, x) => (TOp.VScale(w, p), [s, x])) (layout, vs)
314 : jhr 3855 in
315 : jhr 3948 (Env.VEC(layout, exps), stms@stms')
316 : jhr 3855 end
317 : jhr 3834 | Op.VMul _ => bindVOp TOp.VMul
318 :     | Op.VNeg _ => bindVOp TOp.VNeg
319 : jhr 3856 | Op.VSum _ => let
320 :     val [v] = args
321 : jhr 3948 val (layout, pieces, stms) = vectorArg (env, v)
322 :     val e::es = mkArgs (fn (w, p, x) => (TOp.VSum(w, p), [x])) (layout, pieces)
323 : jhr 3856 in
324 : jhr 3948 (Env.TREE(List.foldr (fn (e, es) => T.E_Op(TOp.RAdd, [e, es])) e es), stms)
325 : jhr 3856 end
326 : jhr 4056 | Op.VDot _ => let
327 :     val (layout, argss, stms) = vectorArgs (env, args)
328 :     fun mkArgs (_, [], []) = []
329 :     | mkArgs (w, p::ps, args::argss) =
330 :     T.E_Op(TOp.VDot(w, p), args) :: mkArgs (w-p, ps, argss)
331 :     val e::es = mkArgs (#wid layout, #pieces layout, argss)
332 :     in
333 :     (Env.TREE(List.foldr (fn (e, es) => T.E_Op(TOp.RAdd, [e, es])) e es), stms)
334 :     end
335 : jhr 3844 | Op.VIndex(_, i) => let
336 : jhr 3856 val [v] = args
337 : jhr 3948 val ({wid, pieces, ...}, es, stms) = vectorArg (env, v)
338 : jhr 3880 fun select (_, wid, [w], [e]) = Env.TREE(T.E_Op(TOp.VIndex(wid, w, i), [e]))
339 :     | select (i, wid, w::ws, e::es) =
340 : jhr 3844 if (i < w)
341 : jhr 3880 then Env.TREE(T.E_Op(TOp.VIndex(w, w, i), [e]))
342 :     else select (i-w, wid-w, ws, es)
343 : jhr 3844 | select _ = raise Fail("bogus " ^ Op.toString srcRator)
344 :     in
345 : jhr 3948 (select (i, wid, pieces, es), stms)
346 : jhr 3844 end
347 : jhr 3855 | Op.VClamp n => let
348 :     val [v, lo, hi] = args
349 : jhr 3948 val (layout, vs, stms) = vectorArg (env, v)
350 :     val (lo, stms) = simpleArg env (lo, stms)
351 :     val (hi, stms) = simpleArg env (hi, stms)
352 : jhr 3880 val exps = mkArgs
353 :     (fn (w, p, x) => (TOp.VClamp(w, p), [x, lo, hi]))
354 :     (layout, vs)
355 : jhr 3855 in
356 : jhr 3948 (Env.VEC(layout, exps), List.rev stms)
357 : jhr 3855 end
358 : jhr 3834 | Op.VMapClamp n => bindVOp TOp.VMapClamp
359 :     | Op.VLerp n => bindVOp TOp.VLerp
360 : jhr 4036 | Op.TensorIndex(ty, idxs) => let
361 :     val ([arg], stms) = simpleArgs (env, args)
362 :     val ty = TreeTypeOf.exp arg
363 : jhr 3958 in
364 : jhr 4036 (Env.TREE(T.E_Op(TOp.TensorIndex(ty, idxs), [arg])), stms)
365 : jhr 3958 end
366 : jhr 4036 | Op.ProjectLast(_, idxs) => let
367 :     val ([arg], stms) = simpleArgs (env, args)
368 :     val ty = TreeTypeOf.exp arg
369 : jhr 3958 in
370 : jhr 4036 (Env.TREE(T.E_Op(TOp.ProjectLast(ty, idxs), [arg])), stms)
371 : jhr 3958 end
372 : jhr 4039 | Op.Select(ty, i) => bindTREE (TOp.Select(U.trType ty, i))
373 :     | Op.Subscript ty => bindTREE (TOp.Subscript(U.trType ty))
374 :     | Op.MkDynamic(ty, n) => bindTREE (TOp.MkDynamic(U.trType ty, n))
375 :     | Op.Append ty => bindTREE (TOp.Append(U.trType ty))
376 :     | Op.Prepend ty => bindTREE (TOp.Prepend(U.trType ty))
377 :     | Op.Concat ty => bindTREE (TOp.Concat(U.trType ty))
378 :     | Op.Range => bindTREE TOp.Range
379 :     | Op.Length ty => bindTREE (TOp.Length(U.trType ty))
380 :     | Op.SphereQuery(ty1, ty2) => bindTREE (TOp.SphereQuery(U.trType ty1, U.trType ty2))
381 :     | Op.Sqrt => bindTREE TOp.Sqrt
382 :     | Op.Cos => bindTREE TOp.Cos
383 :     | Op.ArcCos => bindTREE TOp.ArcCos
384 :     | Op.Sin => bindTREE TOp.Sin
385 :     | Op.ArcSin => bindTREE TOp.ArcSin
386 :     | Op.Tan => bindTREE TOp.Tan
387 :     | Op.ArcTan => bindTREE TOp.ArcTan
388 :     | Op.Exp => bindTREE TOp.Exp
389 :     | Op.Ceiling 1 => bindTREE TOp.RCeiling
390 : jhr 3880 | Op.Ceiling d => bindVOp TOp.VCeiling
391 : jhr 4039 | Op.Floor 1 => bindTREE TOp.RFloor
392 : jhr 3880 | Op.Floor d => bindVOp TOp.VFloor
393 : jhr 4039 | Op.Round 1 => bindTREE TOp.RRound
394 : jhr 3880 | Op.Round d => bindVOp TOp.VRound
395 : jhr 4039 | Op.Trunc 1 => bindTREE TOp.RTrunc
396 : jhr 3880 | Op.Trunc d => bindVOp TOp.VTrunc
397 : jhr 4039 | Op.IntToReal => bindTREE TOp.IntToReal
398 :     | Op.RealToInt 1 => bindTREE TOp.RealToInt
399 : jhr 3880 | Op.RealToInt d => let
400 : jhr 3966 val [v] = args
401 :     val (layout, args, stms) = vectorArg (env, v)
402 : jhr 3880 in
403 :     case #pieces layout
404 : jhr 3948 of [w] => (Env.TREE(T.E_Op(TOp.VToInt(d, w), args)), stms)
405 : jhr 3880 | _ => raise Fail(concat["FIXME: RealToInt<", Int.toString d, ">"])
406 :     (* end case *)
407 :     end
408 : jhr 3955 (* FIXME: reduction operators
409 : jhr 3834 | Op.R_All ty => ??
410 :     | Op.R_Exists ty => ??
411 :     | Op.R_Max ty => ??
412 :     | Op.R_Min ty => ??
413 :     | Op.R_Sum ty => ??
414 :     | Op.R_Product ty => ??
415 :     | Op.R_Mean ty => ??
416 :     | Op.R_Variance ty => ??
417 : jhr 3844 *)
418 : jhr 4039 | Op.Transform info => bindTREE (TOp.Transform info)
419 :     | Op.Translate info => bindTREE (TOp.Translate info)
420 :     | Op.ControlIndex(info, ctl, d) => bindTREE (TOp.ControlIndex(info, ctl, d))
421 :     | Op.LoadVoxel info => bindTREE (TOp.LoadVoxel info)
422 :     | Op.Inside(info, s) => bindTREE (TOp.Inside(info, s))
423 :     | Op.ImageDim(info, d) => bindTREE(TOp.ImageDim(info, d))
424 :     | Op.MathFn f => bindTREE (TOp.MathFn f)
425 : jhr 3844 | rator => raise Fail("bogus operator " ^ Op.toString srcRator)
426 : jhr 3829 (* end case *)
427 :     end
428 :    
429 : jhr 3955 (* FIXME: we need to defer the copy when possible *)
430 :     (* if required, add a TensorCopy operation to the rhs of an assignment *)
431 :     fun mkAssignRHS (TTy.TensorTy _, rhs) = (case TreeTypeOf.exp rhs
432 :     of TTy.TensorRefTy shp => T.E_Op(TOp.TensorCopy shp, [rhs])
433 :     | _ => rhs
434 :     (* end case *))
435 :     | mkAssignRHS (_, rhs) = rhs
436 :    
437 :     fun mkDefn' (x, rhs) = mkDefn (x, mkAssignRHS(TV.ty x, rhs))
438 :     fun mkAssign' (x, rhs) = mkAssign (x, mkAssignRHS(TV.ty x, rhs))
439 :    
440 : jhr 3852 (* cases:
441 :     x in EqClass
442 :     issue assignment; lhs is binding of representative (could be multiple vars)
443 :     useCount(x) > 1 and rhs is not simple
444 :     rhs is simple
445 :     rhs is vector
446 :     *)
447 : jhr 3834 fun trAssign (env, lhs, rhs) = let
448 : jhr 3955 fun getLHS () = (case UnifyVars.eqClassOf lhs of SOME x => x | _ => lhs)
449 : jhr 4039 fun bindRHS rhs = Env.bindVar (env, getLHS(), Env.RHS(U.trTempType(V.ty lhs), rhs))
450 : jhr 3889 (* binding for the lhs variable, where the rhs is a simple expression. We check to
451 :     * see if it is part of an merged equivalence class, in which case we need to generate
452 :     * assigment(s)
453 : jhr 3836 *)
454 : jhr 3853 fun bindSimple rhs = (case eqClassRepOf(env, lhs)
455 : jhr 3948 of NOEQ => (Env.bindSimple (env, lhs, rhs); [])
456 : jhr 3955 | VAR x' => [mkAssign' (x', rhs)]
457 : jhr 3889 | VEC xs' => (case V.ty lhs
458 :     of Ty.TensorTy[d] => let
459 :     val layout = Env.layoutVec env d
460 : jhr 4033 val rhs = mkRef rhs
461 : jhr 3889 in
462 :     List.mapi
463 :     (fn (i, x') => mkAssign(x', T.E_VLoad(layout, rhs, i)))
464 :     xs'
465 :     end
466 :     | _ => raise Fail "inconsistent"
467 :     (* end case *))
468 : jhr 3836 (* end case *))
469 : jhr 3948 fun assignOp (rator, args) = let
470 :     val (args, stms) = simpleArgs (env, args)
471 :     in
472 :     case eqClassRepOf(env, lhs)
473 :     of NOEQ => (
474 :     bindRHS (T.E_Op(rator, args));
475 :     stms)
476 : jhr 3955 | VAR x' => stms @ [mkAssign' (x', T.E_Op(rator, args))]
477 : jhr 3948 | VEC _ => raise Fail ("unexpected VEC for lhs " ^ V.toString lhs)
478 :     (* end case *)
479 :     end
480 : jhr 3834 in
481 :     case rhs
482 : jhr 3844 of IR.GLOBAL x => bindSimple (T.E_Global(mkGlobalVar x))
483 : jhr 3852 | IR.STATE(NONE, fld) =>
484 :     bindSimple (T.E_State(NONE, getStateVar fld))
485 : jhr 3948 | IR.STATE(SOME x, fld) => let
486 :     val (arg, stms) = simpleArg env (x, [])
487 :     val stms' = bindSimple (T.E_State(SOME arg, getStateVar fld))
488 :     in
489 :     stms' @ stms
490 :     end
491 : jhr 3854 | IR.VAR x => raise Fail "FIXME: VAR"
492 : jhr 3850 | IR.LIT lit => bindSimple (T.E_Lit lit)
493 : jhr 4025 (* FIXME: use the general IR.OP case for eigen-things, since the target info says that they
494 :     * are not inline.
495 :     *)
496 : jhr 3852 | IR.OP(Op.EigenVecs2x2, args) => assignOp (TOp.EigenVecs2x2, args)
497 :     | IR.OP(Op.EigenVecs3x3, args) => assignOp (TOp.EigenVecs3x3, args)
498 :     | IR.OP(Op.EigenVals2x2, args) => assignOp (TOp.EigenVals2x2, args)
499 :     | IR.OP(Op.EigenVals3x3, args) => assignOp (TOp.EigenVals3x3, args)
500 : jhr 3886 | IR.OP(Op.Zero(ty as Ty.TensorTy dd), []) => let
501 : jhr 3887 val z = T.E_Lit(Literal.Real(RealLit.zero false))
502 : jhr 3886 val sz = List.foldl Int.* 1 dd
503 : jhr 3948 in
504 :     bindRHS (T.E_Cons(List.tabulate(sz, fn _ => z), U.trType ty));
505 :     []
506 :     end
507 : jhr 3886 | IR.OP(Op.LoadSeq(ty, file), []) => let
508 : jhr 3955 val lhs = newLocal (env, getLHS ())
509 : jhr 3886 in
510 : jhr 3948 [T.S_LoadNrrd(lhs, U.toAPIType ty, file)]
511 : jhr 3886 end
512 :     | IR.OP(Op.LoadImage(ty, file), []) => let
513 : jhr 3955 val lhs = newLocal (env, getLHS ())
514 : jhr 3886 in
515 : jhr 3948 [T.S_LoadNrrd(lhs, U.toAPIType ty, file)]
516 : jhr 3886 end
517 : jhr 3852 | IR.OP(rator, args) => let
518 : jhr 3948 val (rhs, stms) = trOp (env, rator, args)
519 : jhr 4025 val emitBind = (V.useCount lhs > 1) orelse not(Env.isInlineOp env rator)
520 : jhr 3852 in
521 : jhr 4025 case (rhs, eqClassRepOf(env, lhs), emitBind)
522 : jhr 3948 of (_, NOEQ, false) => (Env.bindVar (env, lhs, rhs); stms)
523 : jhr 4026 (* FIXME: if the rhs has TensorRef type, then we should make the lhs TensorRef too! *)
524 : jhr 3955 | (Env.TREE e, NOEQ, true) => mkDefn'(newLocal(env, lhs), e) :: stms
525 :     | (Env.TREE e, VAR x', _) => mkAssign'(x', e) :: stms
526 : jhr 3854 | (Env.VEC(layout, es), NOEQ, true) => let
527 : jhr 3948 val vs = U.newVectorVars layout
528 : jhr 3854 in
529 : jhr 3948 Env.bindVar (env, lhs, Env.VEC(layout, List.map T.E_Var vs));
530 :     ListPair.foldl (fn (v, e, stms) => mkDefn(v, e)::stms) stms (vs, es)
531 : jhr 3854 end
532 : jhr 3948 | (Env.VEC(layout, es), VEC xs, _) =>
533 :     ListPair.foldl (fn (x, e, stms) => mkAssign(x, e)::stms) stms (xs, es)
534 : jhr 3854 | _ => raise Fail "inconsistent"
535 :     (* end case *)
536 : jhr 3852 end
537 :     | IR.CONS(args, Ty.TensorTy[d]) => let
538 : jhr 3854 val layout = Env.layoutVec env d
539 : jhr 3948 val (args, stms) = simpleArgs (env, args)
540 : jhr 3854 fun mkVecs (args, w::ws) = let
541 : jhr 3858 (* take arguments from args to build a vector value of width w; pad as
542 :     * necessary.
543 :     *)
544 : jhr 3889 fun take (0, args, es) = T.E_Vec(w, w, List.rev es) :: mkVecs (args, ws)
545 : jhr 3855 | take (i, [], es) = if #padded layout andalso null ws
546 : jhr 3889 then [T.E_Vec(w-i, w, List.rev es)]
547 : jhr 3855 else raise Fail "too few arguments for CONS"
548 : jhr 3948 | take (i, arg::args, es) = take (i-1, args, arg :: es)
549 : jhr 3854 in
550 :     take (w, args, [])
551 :     end
552 :     | mkVecs ([], []) = []
553 :     | mkVecs (_, []) = raise Fail "too many arguments for CONS"
554 :     val es = mkVecs (args, #pieces layout)
555 : jhr 3852 in
556 : jhr 3854 case (eqClassRepOf(env, lhs), V.useCount lhs > 1)
557 : jhr 3948 of (NOEQ, false) => (Env.bindVar(env, lhs, Env.VEC(layout, es)); stms)
558 : jhr 3854 | (NOEQ, true) => let
559 : jhr 3948 val vs = U.newVectorVars layout
560 : jhr 3854 in
561 : jhr 3948 Env.bindVar (env, lhs, Env.VEC(layout, List.map T.E_Var vs));
562 :     ListPair.foldl (fn (v, e, stms) => mkDefn(v, e)::stms) stms (vs, es)
563 : jhr 3854 end
564 : jhr 3948 | (VEC xs, _) =>
565 :     ListPair.foldl (fn (x, e, stms) => mkAssign(x, e)::stms) stms (xs, es)
566 : jhr 3854 | _ => raise Fail "inconsistent"
567 :     (* end case *)
568 : jhr 3852 end
569 : jhr 3941 | IR.CONS(args, ty) => let
570 :     val (es, stms) = singleArgs (env, args)
571 : jhr 3948 val ty = U.trType ty
572 : jhr 3941 in
573 : jhr 3955 Env.bindVar (env, getLHS (), Env.RHS(ty, T.E_Cons(es, ty)));
574 : jhr 3948 stms
575 : jhr 3941 end
576 :     | IR.SEQ(args, ty) => let
577 :     val (es, stms) = singleArgs (env, args)
578 : jhr 3948 val ty = U.trType ty
579 : jhr 3941 in
580 : jhr 3955 Env.bindVar (env, getLHS (), Env.RHS(ty, T.E_Seq(es, ty)));
581 : jhr 3948 stms
582 : jhr 3941 end
583 : jhr 3852 | rhs => raise Fail(concat["unexpected ", IR.RHS.toString rhs, " in LowIR code"])
584 : jhr 3834 (* end case *)
585 :     end
586 : jhr 3856 handle ex => (
587 :     print(concat["trAssign: ", V.toString lhs, " = ", IR.RHS.toString rhs, "\n"]);
588 :     raise ex)
589 : jhr 3834
590 :     (* In order to reconstruct the block-structure from the CFG, we keep a stack of open ifs.
591 :     * the items on this stack distinguish between when we are processing the then and else
592 :     * branches of the if.
593 :     *)
594 :     datatype open_if
595 :     (* working on the "then" branch. The fields are statments that preceed the if, the condition,
596 :     * and the else-branch node.
597 :     *)
598 :     = THEN_BR of T.stm list * T.exp * IR.node
599 :     (* working on the "else" branch. The fields are statments that preceed the if, the condition,
600 :     * the "then" branch statements, and the node kind that terminated the "then" branch (will be
601 :     * a JOIN or EXIT(DIE, STABILIZE, or UNREACHABLE)).
602 :     *)
603 :     | ELSE_BR of T.stm list * T.exp * T.stm list * IR.node_kind
604 :    
605 : jhr 3852 fun trCFGWithEnv (env, cfg) = let
606 : jhr 3856 fun useScalar x = (case useVar env x
607 : jhr 3948 of Env.RHS(_, e) => e
608 :     | Env.TREE e => e
609 : jhr 3835 | _ => raise Fail("expected scalar binding for " ^ V.toString x)
610 :     (* end case *))
611 : jhr 3834 val _ = UnifyVars.analyze cfg
612 : jhr 3851 (* join (stk, stms, k): handle a control-flow join, where env is the
613 : jhr 3834 * current environment, stk is the stack of open ifs (the top of stk specifies
614 :     * which branch we are in), stms are the TreeIL statements preceding the join
615 :     * on the current path, and k is the kind of the join node (either JOIN or EXIT).
616 :     *)
617 : jhr 3851 fun join ([], _, IR.JOIN _) = raise Fail "JOIN with no open if"
618 : jhr 3852 | join ([], stms, _) = mkBlock (List.rev stms)
619 : jhr 3851 | join (THEN_BR(stms1, cond, elseBr)::stk, thenBlk, k) = let
620 :     val thenBlk = Env.flushPending (env, thenBlk)
621 : jhr 3834 in
622 : jhr 3851 doNode (elseBr, ELSE_BR(stms1, cond, thenBlk, k)::stk, [])
623 : jhr 3834 end
624 : jhr 3851 | join (ELSE_BR(stms, cond, thenBlk, k1)::stk, elseBlk, k2) = let
625 :     val elseBlk = Env.flushPending (env, elseBlk)
626 : jhr 3834 in
627 :     case (k1, k2)
628 : jhr 3848 of (IR.JOIN{succ, ...}, IR.JOIN _) => let
629 : jhr 3834 val stm = mkIf(cond, List.rev thenBlk, List.rev elseBlk)
630 :     in
631 : jhr 3851 doNode (!succ, stk, stm::stms)
632 : jhr 3834 end
633 : jhr 3848 | (IR.JOIN{succ, ...}, _) => let
634 : jhr 3834 val stm = mkIf(cond, List.rev thenBlk, List.rev elseBlk)
635 :     in
636 : jhr 3851 doNode (!succ, stk, stm::stms)
637 : jhr 3834 end
638 : jhr 3848 | (_, IR.JOIN{succ, ...}) => let
639 : jhr 3834 val stm = mkIf(cond, List.rev thenBlk, List.rev elseBlk)
640 :     in
641 : jhr 3851 doNode (!succ, stk, stm::stms)
642 : jhr 3834 end
643 :     | (_, _) => let
644 :     val stm = mkIf(cond, List.rev thenBlk, List.rev elseBlk)
645 :     in
646 : jhr 3852 mkBlock (List.rev(stm::stms))
647 : jhr 3834 end
648 :     (* end case *)
649 :     end
650 : jhr 3851 and doNode (nd : IR.node, ifStk : open_if list, stms) = (case IR.Node.kind nd
651 : jhr 3834 of IR.NULL => raise Fail "unexpected NULL"
652 : jhr 3851 | IR.ENTRY{succ} => doNode (!succ, ifStk, stms)
653 :     | k as IR.JOIN _ => join (ifStk, stms, k)
654 : jhr 3834 | IR.COND{cond, trueBranch, falseBranch, ...} => let
655 : jhr 3835 val cond = useScalar (!cond)
656 : jhr 3851 val stms = Env.flushPending (env, stms)
657 : jhr 3834 in
658 : jhr 3851 doNode (!trueBranch, THEN_BR(stms, cond, !falseBranch)::ifStk, [])
659 : jhr 3834 end
660 : jhr 3835 | IR.FOREACH{var, src, bodyEntry, succ, ...} => let
661 : jhr 3948 val var' = U.newIterVar var
662 :     val _ = Env.bindSimple (env, var, T.E_Var var')
663 : jhr 3924 (* note that the flatten phase on LowIR should guarantee that each
664 :     * FOREACH node that takes a Range argument has its own instance of
665 :     * the Range expression.
666 : jhr 3948 * Note also that we resolve the src scalar before processing the body
667 :     * of the loop so that any nested flushPendings do not cause Range
668 :     * bindings to be flushed.
669 : jhr 3924 *)
670 : jhr 3948 val mkStm = (case useScalar(!src)
671 :     of T.E_Op(TOp.Range, [lo, hi]) =>
672 :     (fn body => T.S_For(var', lo, hi, body))
673 :     | e =>
674 :     (fn body => T.S_Foreach(var', e, body))
675 : jhr 3924 (* end case *))
676 :     val stms = Env.flushPending (env, stms)
677 : jhr 3948 val stm = mkStm (doNode (!bodyEntry, [], []))
678 : jhr 3834 in
679 : jhr 3851 doNode (!succ, ifStk, stm::stms)
680 : jhr 3834 end
681 : jhr 3848 | IR.NEXT _ => mkBlock (List.rev stms)
682 : jhr 3834 | IR.COM {text, succ, ...} =>
683 : jhr 3851 doNode (!succ, ifStk, T.S_Comment text :: stms)
684 : jhr 3834 | IR.ASSIGN{stm=(lhs, rhs), succ, ...} => let
685 : jhr 3852 val stms' = trAssign (env, lhs, rhs)
686 : jhr 3834 in
687 : jhr 3851 doNode (!succ, ifStk, stms' @ stms)
688 : jhr 3834 end
689 : jhr 3866 | IR.MASSIGN{stm=([], Op.Print tys, xs), succ, ...} => let
690 : jhr 3941 val (es, stms') = singleArgs (env, xs)
691 : jhr 4033 (* translate TensorTy to TensorRefTy in the type list *)
692 :     fun trType (Ty.TensorTy(shp as _::_)) = TTy.TensorRefTy shp
693 :     | trType ty = U.trType ty
694 :     val tys = List.map trType tys
695 :     val stm = T.S_Print(tys, List.map mkRef es)
696 : jhr 3848 in
697 : jhr 3941 doNode (!succ, ifStk, stm :: List.revAppend (stms', stms))
698 : jhr 3848 end
699 : jhr 3866 | IR.MASSIGN{stm=(ys, rator, xs), succ, ...} => raise Fail(concat[
700 :     "unexepected operator ", Op.toString rator, " for MASSIGN"
701 :     ])
702 : jhr 3834 | IR.GASSIGN{lhs, rhs, succ, ...} => let
703 : jhr 3948 val gv = mkGlobalVar lhs
704 : jhr 3955 fun mkGAssign (gv, e) = T.S_GAssign(gv, mkAssignRHS(TGV.ty gv, e))
705 : jhr 3948 val stm = (case useVar env rhs
706 : jhr 3955 of Env.RHS(_, e) => mkGAssign(gv, e)
707 :     | Env.TREE e => mkGAssign(gv, e)
708 : jhr 3948 | Env.VEC(layout, es) => let
709 :     val tmp = U.newTempVar("_arg", TTy.TensorTy[#wid layout])
710 :     in
711 :     T.S_GAssign(gv, T.E_Pack(layout, es))
712 :     end
713 :     (* end case *))
714 : jhr 3834 in
715 : jhr 3948 doNode (!succ, ifStk, stm :: stms)
716 : jhr 3834 end
717 : jhr 3851 | IR.NEW{strand, args, succ, ...} => let
718 : jhr 3941 val (es, stms') = singleArgs (env, args)
719 :     val stm = T.S_New(strand, es)
720 : jhr 3851 in
721 : jhr 3941 doNode (!succ, ifStk, stm :: List.revAppend (stms', stms))
722 : jhr 3851 end
723 : jhr 3834 | IR.SAVE{lhs, rhs, succ, ...} => let
724 : jhr 3948 val sv = getStateVar lhs
725 : jhr 3955 fun mkSAssign (sv, e) = T.S_Save(sv, mkAssignRHS(TSV.ty sv, e))
726 : jhr 3948 val stm = (case useVar env rhs
727 : jhr 3955 of Env.RHS(_, e) => mkSAssign(sv, e)
728 :     | Env.TREE e => mkSAssign(sv, e)
729 : jhr 3948 | Env.VEC(layout, es) => let
730 :     val tmp = U.newTempVar("_arg", TTy.TensorTy[#wid layout])
731 :     in
732 :     T.S_Save(sv, T.E_Pack(layout, es))
733 :     end
734 :     (* end case *))
735 : jhr 3834 in
736 : jhr 3948 doNode (!succ, ifStk, stm :: stms)
737 : jhr 3834 end
738 :     | k as IR.EXIT{kind, succ, ...} => (case (!succ, kind)
739 : jhr 3852 of (NONE, ExitKind.RETURN) => mkBlock (List.rev(T.S_Exit :: stms))
740 :     | (NONE, ExitKind.ACTIVE) => mkBlock (List.rev(T.S_Active :: stms))
741 : jhr 3834 | (NONE, ExitKind.STABILIZE) => let
742 :     val stms = T.S_Stabilize :: stms
743 :     in
744 : jhr 3851 join (ifStk, stms, k)
745 : jhr 3834 end
746 : jhr 3851 | (NONE, ExitKind.DIE) => join (ifStk, T.S_Die :: stms, k)
747 :     | (NONE, ExitKind.UNREACHABLE) => join (ifStk, stms, k)
748 :     | (SOME nd, ExitKind.ACTIVE) => doNode (nd, ifStk, T.S_Active :: stms)
749 :     | (SOME nd, ExitKind.STABILIZE) => doNode (nd, ifStk, T.S_Stabilize :: stms)
750 :     | (SOME nd, ExitKind.DIE) => doNode (nd, ifStk, T.S_Die :: stms)
751 :     | (SOME nd, ExitKind.UNREACHABLE) => doNode (nd, ifStk, stms)
752 : jhr 3834 | _ => raise Fail("unexpected continuation edge from "^IR.Node.toString nd)
753 :     (* end case *))
754 :     (* end case *))
755 :     in
756 : jhr 3857 doNode (IR.CFG.entry cfg, [], [])
757 : jhr 3834 end
758 :    
759 : jhr 3857 fun trCFG info cfg = ScopeVars.assignScopes ([], trCFGWithEnv (Env.new info, cfg))
760 : jhr 3835
761 : jhr 3953 (* Build a strand method from a TreeIR block. We need to check for language features
762 :     * that require the world pointer (e.g., printing) and for references to global variables.
763 :     *)
764 : jhr 3952 fun mkMethod body = let
765 :     fun chkBlock (T.Block{body, ...}, uG, nW) =
766 :     chkStms (body, uG, nW)
767 :     and chkStms ([], uG, nW) = (uG, nW)
768 :     | chkStms (stm::stms, uG, nW) = let
769 :     fun next (true, true) = (true, true)
770 :     | next (uG, nW) = chkStms (stms, uG, nW)
771 :     in
772 :     case stm
773 :     of T.S_Assign(_, _, e) => next (chkExp (e, uG, nW))
774 :     | T.S_MAssign(_, e) => next (chkExp (e, uG, nW))
775 :     | T.S_GAssign(_, e) => next (chkExp (e, true, nW))
776 :     | T.S_IfThen(e, blk) => let
777 :     val (uG, nW) = chkExp (e, uG, nW)
778 :     in
779 : jhr 3974 next (chkBlock (blk, uG, nW))
780 : jhr 3952 end
781 :     | T.S_IfThenElse(e, blk1, blk2) => let
782 :     val (uG, nW) = chkExp (e, uG, nW)
783 :     val (uG, nW) = chkBlock (blk1, uG, nW)
784 :     in
785 : jhr 3974 next (chkBlock (blk2, uG, nW))
786 : jhr 3952 end
787 :     | T.S_For(_, e1, e2, blk) => let
788 :     val (uG, nW) = chkExp (e1, uG, nW)
789 :     val (uG, nW) = chkExp (e2, uG, nW)
790 :     in
791 : jhr 3974 next (chkBlock (blk, uG, nW))
792 : jhr 3952 end
793 :     | T.S_Foreach(_, e, blk) => let
794 :     val (uG, nW) = chkExp (e, uG, nW)
795 :     in
796 : jhr 3974 next (chkBlock (blk, uG, nW))
797 : jhr 3952 end
798 :     | T.S_LoadNrrd _ => raise Fail "unexpected LoadNrrd"
799 :     | T.S_Input _ => raise Fail "unexpected Input"
800 :     | T.S_InputNrrd _ => raise Fail "unexpected InputNrrd"
801 :     | T.S_New(_, es) => next (chkExps (es, uG, true))
802 :     | T.S_Save(_, e) => next (chkExp (e, uG, nW))
803 :     | T.S_Print(_, es) => next (chkExps (es, uG, true))
804 :     | _ => next (uG, nW)
805 :     (* end case *)
806 :     end
807 :     and chkExps ([], uG, nW) = (uG, nW)
808 :     | chkExps (_, true, true) = (true, true)
809 :     | chkExps (e::es, uG, nW) = let
810 :     val (uG, nW) = chkExp (e, uG, nW)
811 :     in
812 :     chkExps (es, uG, nW)
813 :     end
814 : jhr 3974 and chkExp (T.E_Global gv, _, nW) = (true, nW)
815 :     | chkExp (T.E_State(SOME e, _), uG, nW) = chkExp (e, uG, nW)
816 : jhr 3952 | chkExp (T.E_Op(TOp.SphereQuery _, es), uG, nW) = chkExps (es, uG, true)
817 :     | chkExp (T.E_Op(_, es), uG, nW) = chkExps (es, uG, nW)
818 :     | chkExp (T.E_Vec(_, _, es), uG, nW) = chkExps (es, uG, nW)
819 :     | chkExp (T.E_Cons(es, _), uG, nW) = chkExps (es, uG, nW)
820 :     | chkExp (T.E_Seq(es, _), uG, nW) = chkExps (es, uG, nW)
821 :     | chkExp (T.E_Pack(_, es), uG, nW) = chkExps (es, uG, nW)
822 :     | chkExp (T.E_VLoad(_, e, _), uG, nW) = chkExp (e, uG, nW)
823 :     | chkExp (_, uG, nW) = (uG, nW)
824 :     val (usesGlobals, needsWorld) = chkBlock (body, false, false)
825 :     in
826 :     T.Method{usesGlobals = usesGlobals, needsWorld = needsWorld, body = body}
827 :     end
828 :    
829 : jhr 3851 fun trStrand info strand = let
830 : jhr 3952 val trMethod = mkMethod o trCFG info
831 : jhr 3835 val IR.Strand{name, params, state, stateInit, initM, updateM, stabilizeM} = strand
832 : jhr 3948 val params' = List.map U.newParamVar params
833 : jhr 3835 val state' = List.map getStateVar state
834 : jhr 3857 val stateInit' = let
835 :     val env = Env.new info
836 :     in
837 :     ListPair.appEq
838 : jhr 3948 (fn (x, x') => Env.bindSimple (env, x, T.E_Var x'))
839 : jhr 3857 (params, params');
840 : jhr 3952 mkMethod (ScopeVars.assignScopes (params', trCFGWithEnv (env, stateInit)))
841 : jhr 3857 end
842 : jhr 3835 in
843 :     T.Strand{
844 :     name = name,
845 :     params = params',
846 :     state = state',
847 : jhr 3857 stateInit = stateInit',
848 : jhr 3952 initM = Option.map trMethod initM,
849 :     updateM = trMethod updateM,
850 :     stabilizeM = Option.map trMethod stabilizeM
851 : jhr 3835 }
852 :     end
853 :    
854 : jhr 3851 fun translate (prog, info) = let
855 : jhr 3879 (* first step is to flatten any nested CONS nodes *)
856 :     val prog = Flatten.transform prog
857 : jhr 3834 val LowIR.Program{
858 : jhr 3995 props, consts, inputs, constInit, globals,
859 :     globInit, strand, create, init, update
860 : jhr 3834 } = prog
861 : jhr 3852 val trCFG = trCFG info
862 : jhr 3834 in
863 :     TreeIR.Program{
864 :     props = props,
865 : jhr 3861 target = info,
866 : jhr 3852 consts = List.map mkGlobalVar consts,
867 :     inputs = List.map (Inputs.map mkGlobalVar) inputs,
868 :     constInit = trCFG constInit,
869 :     globals = List.map mkGlobalVar globals,
870 : jhr 3995 globInit = trCFG globInit,
871 : jhr 3851 strand = trStrand info strand,
872 : jhr 4045 create = Create.map trCFG create,
873 : jhr 3995 init = Option.map trCFG init,
874 : jhr 3852 update = Option.map trCFG update
875 : jhr 3834 }
876 :     end
877 :    
878 : jhr 3828 end

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