-
Notifications
You must be signed in to change notification settings - Fork 2
/
ppx_cd.ml
1085 lines (1060 loc) · 46.4 KB
/
ppx_cd.ml
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
open Base
open Ppxlib
open Ppx_arrayjit.Ppx_helper
open Ppx_shared
module A = Ppxlib_ast.Ast_helper
let ndarray_op ?axis_labels ?label expr =
let loc = expr.pexp_loc in
let values, batch_dims, output_dims, input_dims = ndarray_constant expr in
let edims dims = Ast_builder.Default.elist ~loc dims in
let op =
match (axis_labels, label) with
| None, None -> [%expr NTDSL.ndarray]
| Some axis_labels, None -> [%expr NTDSL.ndarray ~axis_labels:[%e axis_labels]]
| None, Some label -> [%expr NTDSL.ndarray ~label:[%e label]]
| Some axis_labels, Some label ->
[%expr NTDSL.ndarray ~axis_labels:[%e axis_labels] ~label:[%e label]]
in
[%expr
[%e op] ~batch_dims:[%e edims batch_dims] ~input_dims:[%e edims input_dims]
~output_dims:[%e edims output_dims] [%e values]]
type expr_type =
| Code
| Array
| Value_of_tensor of expression
| Grad_of_tensor of expression
| Tensor
| Unknown
| Merge_value of expression
| Merge_grad of expression
| No_grad_tensor_intro of { name : string; name_expr : expression }
let is_unknown = function Unknown -> true | _ -> false
type projections_slot = LHS | RHS1 | RHS2 | Nonslot | Undet [@@deriving equal, sexp]
let assignment_op expr =
(* This should stay in sync with Arrayjit.Ops.assign_op_cd_syntax. *)
let loc = expr.pexp_loc in
match expr with
| [%expr ( =: )] -> (false, [%expr Arrayjit.Ops.Arg2])
| [%expr ( =+ )] -> (false, [%expr Arrayjit.Ops.Add])
| [%expr ( =- )] -> (false, [%expr Arrayjit.Ops.Sub])
| [%expr ( =* )] -> (false, [%expr Arrayjit.Ops.Mul])
| [%expr ( =/ )] -> (false, [%expr Arrayjit.Ops.Div])
| [%expr ( =** )] -> (false, [%expr Arrayjit.Ops.ToPowOf])
| [%expr ( =?/ )] -> (false, [%expr Arrayjit.Ops.Relu_gate])
| [%expr ( =:+ )] -> (true, [%expr Arrayjit.Ops.Add])
| [%expr ( =:- )] -> (true, [%expr Arrayjit.Ops.Sub])
| [%expr ( =:* )] -> (true, [%expr Arrayjit.Ops.Mul])
| [%expr ( =:/ )] -> (true, [%expr Arrayjit.Ops.Div])
| [%expr ( =:** )] -> (true, [%expr Arrayjit.Ops.ToPowOf])
| [%expr ( =:?/ )] -> (true, [%expr Arrayjit.Ops.Relu_gate])
| _ ->
( false,
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: expected an assignment operator, one of: %s %s"
"=+ (Add), =- (Sub), =* (Mul), =/ (Div), =** (ToPowOf), =?/ (Relu_gate), =: (Arg2), \
=:+, =:-,"
" =:*, =:/, =:**, =:?/ (same with initializing the tensor to the neutral value before \
the start of the calculation)" )
let binary_op expr =
(* This and is_binary_op should stay in sync with Arrayjit.Ops.binop_cd_syntax. *)
let loc = expr.pexp_loc in
match expr with
| [%expr ( + )] -> ([%expr Shape.Pointwise_bin], [%expr Arrayjit.Ops.Add])
| [%expr ( - )] -> ([%expr Shape.Pointwise_bin], [%expr Arrayjit.Ops.Sub])
| [%expr ( * )] ->
( Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"No default compose type for binary `*`, try e.g. ~logic:\".\" for pointwise, %s"
"~logic:\"@\" for matrix multiplication",
[%expr Arrayjit.Ops.Mul] )
| [%expr ( / )] ->
( Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"For clarity, no default compose type for binary `/`, use ~logic:\".\" for pointwise \
division",
[%expr Arrayjit.Ops.Div] )
| [%expr ( ** )] -> ([%expr Shape.Pointwise_bin], [%expr Arrayjit.Ops.ToPowOf])
| [%expr ( -?/ )] -> ([%expr Shape.Pointwise_bin], [%expr Arrayjit.Ops.Relu_gate])
| [%expr ( -/> )] -> ([%expr Shape.Pointwise_bin], [%expr Arrayjit.Ops.Arg2])
| [%expr ( -@> )] -> ([%expr Shape.Pointwise_bin], [%expr Arrayjit.Ops.Arg1])
| _ ->
( [%expr Shape.Pointwise_bin],
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc "ppx_ocannl %%cd: expected a binary operator, one of: %s"
"+ (Add), - (Sub), * (Mul), / (Div), ** (ToPowOf), -?/ (Relu_gate), -/> (Arg2)" )
let is_binary_op ident =
List.mem [ "+"; "-"; "*"; "/"; "**"; "-?/"; "-/>"; "-@>" ] ident ~equal:String.equal
let unary_op expr =
(* This and is_unary_op should stay in sync with Arrayjit.Ops.unop_cd_syntax. *)
let loc = expr.pexp_loc in
match expr with
| [%expr ( ~= )] -> ([%expr Shape.Pointwise_un], [%expr Arrayjit.Ops.Identity])
| [%expr ( ?/ )] -> ([%expr Shape.Pointwise_un], [%expr Arrayjit.Ops.Relu])
| _ ->
( [%expr Shape.Pointwise_un],
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: expected a unary operator, one of: = (Identity), ?/ (Relu)" )
let is_unary_op ident = List.mem [ "~="; "?/" ] ident ~equal:String.equal
type result = {
vbs : value_binding Map.M(String).t;
(** [vbs] are the bindings introduced by inline tensor declarations (aka. punning). These
bindings are discharged with the whole [%cd] extension scope in scope. *)
typ : expr_type;
slot : projections_slot;
expr : expression;
(** Depending on {!field-typ}, of type:
- if [Code]: [Assignments.comp];
- if [Array | Merge_value | Value_of_tensor]: [Tnode.t];
- if [Merge_grad | Grad_of_tensor]: [Tnode.t option];
- if [Tensor | Unknown | No_grad_tensor_intro]: [Tensor.t]. *)
array_opt_of_code : expression option;
(** Of type: [Tnode.t]. It keeps track of which tensor node to use when [typ] is [Code] but
the result is used in an array context. *)
}
type array_setup = {
vb : value_binding option;
(** This binding is only generated for a tensor expression that is not an identifier, since
recomputing the expression (when copied) would generate a fresh tensor. It is discharged
when an assignment is built. *)
slot : projections_slot;
filler_typ : expr_type;
fwd_code_or_noop : expression option; (** Of type: [Assignments.comp]. *)
array_opt : expression; (** Of type: if [slot = LHS] then [Tnode.t] else [Assignments.buffer]. *)
tensor : expression option; (** Of type: [Tensor.t]. *)
pun_hint_tnode : (expression * bool) option;
(** Of type: [string list]. The tnode, if any, whose label the relevant punned no-gradient
tensor should incorporate in its label. The bool denotes whether this is a preferred (high
quality) guess. *)
}
let make_vb ~loc ~name ~name_expr ~hint_label =
let pat = A.Pat.var ~loc { loc = name_expr.pexp_loc; txt = name } in
let v =
match hint_label with
| None -> [%expr NTDSL.term ~label:[ [%e name_expr] ] ()]
| Some hint_label -> [%expr NTDSL.term ~label:([%e name_expr] :: [%e hint_label]) ()]
in
let vb = A.Vb.mk ~loc pat v in
vb
let reduce_embs_arr ~loc (rs : array_setup list) =
List.filter_map rs ~f:(fun hs -> hs.fwd_code_or_noop)
|> List.reduce ~f:(fun embs comp -> [%expr Base.Set.union [%e embs] [%e comp].embedded_nodes])
(** The expression argument is of type: [Assignments.t]. *)
let assignment ~punned ~lhs ~rhses body =
let setups = lhs :: rhses in
let loc = body.pexp_loc in
let forward_args = List.filter_map setups ~f:(fun { fwd_code_or_noop; _ } -> fwd_code_or_noop) in
let vbs, body =
match lhs.filler_typ with
| No_grad_tensor_intro { name; name_expr } -> (
let good_hints, bad_hints =
List.partition_tf ~f:snd @@ List.filter_map rhses ~f:(fun sup -> sup.pun_hint_tnode)
in
let hint_data = Option.first_some (List.hd good_hints) (List.hd bad_hints) in
let hint_label = Option.map ~f:fst hint_data in
let vbs = Map.singleton (module String) name @@ make_vb ~loc ~name ~name_expr ~hint_label in
match hint_data with
| None -> (vbs, body)
| Some data -> (
match Hashtbl.add punned ~key:name ~data with
| `Ok -> (vbs, body)
| `Duplicate ->
( no_vbs,
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: duplicate inline declaration of no-gradient tensor %s" name
)))
| _ -> (no_vbs, body)
in
let body =
if Option.is_some lhs.vb then
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: the assigned-to position cannot be an expression building a new tensor"
else body
in
let tensor_vbs = List.filter_map rhses ~f:(fun rhs -> rhs.vb) in
let body =
[%expr { asgns = [%e body]; embedded_nodes = Base.Set.empty (module Arrayjit.Tnode) }]
in
let comps =
List.fold (body :: List.rev forward_args) ~init:[%expr []] ~f:(fun xs x ->
[%expr [%e x] :: [%e xs]])
in
let expr = [%expr Arrayjit.Assignments.sequence [%e comps]] in
let expr =
if List.is_empty tensor_vbs then expr else A.Exp.let_ ~loc Nonrecursive tensor_vbs expr
in
{ vbs; typ = Code; slot = Nonslot; expr; array_opt_of_code = Some lhs.array_opt }
let project_p_slot debug loc slot =
match slot with
| LHS -> [%expr p.project_lhs]
| RHS1 -> [%expr p.project_rhs.(0)]
| RHS2 -> [%expr p.project_rhs.(1)]
| Nonslot ->
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: not a valid accumulation/assignment slot filler at %s" debug
| Undet ->
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: insufficient slot filler information at %s %s" debug
"(incorporate one of: v, v1, v2, g, g1, g2, lhs, rhs, rhs1, rhs2)"
let project_p_dims debug loc slot =
match slot with
| LHS -> [%expr p.lhs_dims]
| RHS1 -> [%expr p.rhs_dims.(0)]
| RHS2 -> [%expr p.rhs_dims.(1)]
| Nonslot ->
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: not a valid accumulation/assignment slot filler at %s" debug
| Undet ->
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: insufficient slot filler information at %s %s" debug
"(incorporate one of: v, v1, v2, g, g1, g2, lhs, rhs, rhs1, rhs2)"
let guess_pun_hint ~punned ~bad_pun_hints filler_typ filler =
let loc = filler.pexp_loc in
let hint = [%expr [%e filler].Arrayjit.Tnode.label] in
match (filler_typ, filler) with
| Code, _ -> None
| _, { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ } when Set.mem bad_pun_hints name ->
None
| Array, _ -> Some (hint, false)
| (Tensor | Unknown), { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ }
when Hashtbl.mem punned name ->
Hashtbl.find punned name
| (Tensor | Unknown), { pexp_desc = Pexp_ident _; _ } -> Some (hint, true)
| (Tensor | Unknown), _ -> Some (hint, false)
| ( ( Value_of_tensor { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ }
| Grad_of_tensor { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ }
| Merge_value { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ }
| Merge_grad { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ } ),
_ )
when Set.mem bad_pun_hints name ->
None
| ( ( Value_of_tensor { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ }
| Grad_of_tensor { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ }
| Merge_value { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ }
| Merge_grad { pexp_desc = Pexp_ident { txt = Lident name; _ }; _ } ),
_ )
when Hashtbl.mem punned name ->
Hashtbl.find punned name
| (Value_of_tensor t | Grad_of_tensor t | Merge_value t | Merge_grad t), _ -> (
let hint = [%expr [%e t].Tensor.value.Arrayjit.Tnode.label] in
match t with { pexp_desc = Pexp_ident _; _ } -> Some (hint, true) | _ -> Some (hint, false))
| No_grad_tensor_intro { name; _ }, _ -> Hashtbl.find punned name
let empty_tns ~loc = [%expr Base.Set.empty (module Arrayjit.Tnode)]
let empty_comp ~loc =
[%expr { asgns = Arrayjit.Assignments.Noop; embedded_nodes = [%e empty_tns ~loc] }]
let setup_array ~punned ~bad_pun_hints ~is_lhs
{ typ = filler_typ; slot; expr = filler; vbs; array_opt_of_code } =
assert (Map.is_empty vbs);
let loc = filler.pexp_loc in
let opt_buffer tn =
if is_lhs then [%expr Some [%e tn]] else [%expr Some (Arrayjit.Assignments.Node [%e tn])]
in
let buffer opt_tn =
if is_lhs then opt_tn
else [%expr Option.map [%e opt_tn] ~f:(fun tn -> Arrayjit.Assignments.Node tn)]
in
let pun_hint_tnode = guess_pun_hint ~punned ~bad_pun_hints filler_typ filler in
let default_setup =
{
vb = None;
fwd_code_or_noop = None;
filler_typ;
slot;
array_opt = opt_buffer [%expr [%e filler].Tensor.value];
tensor = None;
pun_hint_tnode;
}
in
match filler_typ with
| No_grad_tensor_intro _ when not is_lhs ->
{
default_setup with
array_opt =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: punning is only allowed in the assigned-to position";
}
| (Tensor | Unknown) when match filler with { pexp_desc = Pexp_ident _; _ } -> true | _ -> false
->
let t = filler in
let fwd_code_or_noop =
Some
[%expr
if Tensor.is_fwd_root [%e t] then (
Tensor.remove_fwd_root [%e t];
[%e t].Tensor.forward)
else [%e empty_comp ~loc]]
in
{ default_setup with fwd_code_or_noop; tensor = Some t }
| Value_of_tensor ({ pexp_desc = Pexp_ident _; _ } as t) ->
let fwd_code_or_noop =
Some
[%expr
if Tensor.is_fwd_root [%e t] then (
Tensor.remove_fwd_root [%e t];
[%e t].Tensor.forward)
else [%e empty_comp ~loc]]
in
{
default_setup with
fwd_code_or_noop;
array_opt = opt_buffer [%expr [%e t].Tensor.value];
tensor = Some t;
}
| Value_of_tensor t ->
{
default_setup with
array_opt =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: the <tensor>.value notation is only supported when <tensor> is an \
identifier";
tensor = Some t;
}
| Tensor | Unknown ->
(* Need to bind the expression computing the tensor so we don't recompute it. *)
let v =
match slot with
| LHS -> [%pat? nondiff__lhs]
| RHS1 -> [%pat? nondiff__rhs1]
| RHS2 -> [%pat? nondiff__rhs2]
| Nonslot | Undet -> [%pat? nondiff__tensor]
in
let t = pat2expr v in
let vb = Some (A.Vb.mk ~loc v filler) in
let fwd_code_or_noop =
Some
[%expr
if Tensor.is_fwd_root [%e t] then (
Tensor.remove_fwd_root [%e t];
[%e t].Tensor.forward)
else [%e empty_comp ~loc]]
in
{
default_setup with
vb;
fwd_code_or_noop;
array_opt = opt_buffer [%expr [%e t].Tensor.value];
tensor = Some t;
}
| No_grad_tensor_intro _ ->
(* Inline tensors are guaranteed to be leaf tensors, so they don't have forward code, but they
are embedded. *)
let fwd_code_or_noop =
Some
[%expr
Arrayjit.Assignments.
{
asgns = Noop;
embedded_nodes = Base.Set.singleton (module Arrayjit.Tnode) [%e filler].Tensor.value;
}]
in
{ default_setup with fwd_code_or_noop; tensor = Some filler }
| Code when Option.is_none array_opt_of_code ->
{
default_setup with
fwd_code_or_noop = Some filler;
array_opt =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: could not determine a lead array of provided code";
}
| Code ->
{
default_setup with
fwd_code_or_noop = Some filler;
array_opt = buffer (Option.value_exn array_opt_of_code);
}
| Array -> { default_setup with array_opt = opt_buffer filler }
| Grad_of_tensor ({ pexp_desc = Pexp_ident _; _ } as t) ->
{ default_setup with array_opt = buffer filler; tensor = Some t }
| Grad_of_tensor t ->
{
default_setup with
array_opt =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: the <tensor>.grad notation is only supported when <tensor> is an \
identifier";
tensor = Some t;
}
| (Merge_value _ | Merge_grad _) when is_lhs ->
{
default_setup with
array_opt =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc "ppx_ocannl %%cd: merge buffers cannot be assigned to";
}
| Merge_value t ->
{ default_setup with array_opt = [%expr Some (Merge_buffer [%e filler])]; tensor = Some t }
| Merge_grad t ->
{
default_setup with
array_opt =
[%expr Option.map [%e filler] ~f:(fun tn -> Arrayjit.Assignments.Merge_buffer tn)];
tensor = Some t;
}
let args_for ~loc = function
| { filler_typ = Merge_grad _; tensor = Some t; _ } -> (t, [%expr true], [%expr true])
| { filler_typ = Grad_of_tensor _; tensor = Some t; _ } -> (t, [%expr true], [%expr false])
| { filler_typ = Merge_value _; tensor = Some t; _ } -> (t, [%expr false], [%expr true])
| { filler_typ = _; tensor = Some t; _ } -> (t, [%expr false], [%expr false])
| _ ->
( Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: cannot use `~logic` (infer shapes) for arrays, use tensors or \
`.value` or `.grad` notation",
[%expr false],
[%expr false] )
let reduce_res_vbs rs = reduce_vbss @@ List.map rs ~f:(fun r -> r.vbs)
let translate (expr : expression) : result =
let punned = Hashtbl.create (module String) in
let rec transl ~bad_pun_hints ~proj_in_scope (expr : expression) : result =
let loc = expr.pexp_loc in
let default_result =
{ vbs = no_vbs; typ = Tensor; slot = Undet; expr; array_opt_of_code = None }
in
let loop = transl ~bad_pun_hints in
let process_assign_binop ~accu_op ~lhs ~bin_op ~rhs1 ~rhs2 ?projections ~proj_in_scope () =
let initialize_neutral, accu_op = assignment_op accu_op in
let setup_l =
setup_array ~punned ~bad_pun_hints ~is_lhs:true @@ loop ~proj_in_scope:true lhs
in
let _, bin_op = binary_op bin_op in
let setup_r1 = setup_array ~punned ~bad_pun_hints ~is_lhs:false @@ loop ~proj_in_scope rhs1 in
let setup_r2 = setup_array ~punned ~bad_pun_hints ~is_lhs:false @@ loop ~proj_in_scope rhs2 in
let initialize_neutral = if initialize_neutral then [%expr true] else [%expr false] in
let projections =
match projections with
| Some prjs -> prjs
| None ->
let lhs_dims = project_p_dims "LHS" lhs.pexp_loc setup_l.slot in
let rhs1_dims = project_p_dims "RHS1" lhs.pexp_loc setup_r1.slot in
let rhs2_dims = project_p_dims "RHS2" lhs.pexp_loc setup_r2.slot in
let project_lhs = project_p_slot "LHS" lhs.pexp_loc setup_l.slot in
let project_rhs1 = project_p_slot "RHS1" rhs1.pexp_loc setup_r1.slot in
let project_rhs2 = project_p_slot "RHS2" rhs2.pexp_loc setup_r2.slot in
[%expr
lazy
(let p = Lazy.force projections in
Arrayjit.Indexing.
{
product_space = p.product_space;
product_iterators = p.product_iterators;
lhs_dims = [%e lhs_dims];
rhs_dims = [| [%e rhs1_dims]; [%e rhs2_dims] |];
project_lhs = [%e project_lhs];
project_rhs = [| [%e project_rhs1]; [%e project_rhs2] |];
debug_info =
{
p.debug_info with
trace =
( "ppx_cd " ^ [%e expr2string_or_empty accu_op] ^ " "
^ [%e expr2string_or_empty bin_op],
Arrayjit.Indexing.unique_debug_id () )
:: p.debug_info.trace;
};
})]
in
(* TODO: might be better to treat missing [rhs1, rhs2] as zeros or errors rather than eliding
the code. *)
let body =
[%expr
Option.value ~default:Arrayjit.Assignments.Noop
@@ Option.map3 [%e setup_l.array_opt] [%e setup_r1.array_opt] [%e setup_r2.array_opt]
~f:(fun lhs rhs1 rhs2 ->
Arrayjit.Assignments.Accum_binop
{
initialize_neutral = [%e initialize_neutral];
accum = [%e accu_op];
lhs;
op = [%e bin_op];
rhs1;
rhs2;
projections = [%e projections];
})]
in
assignment ~punned ~lhs:setup_l ~rhses:[ setup_r1; setup_r2 ] body
in
let process_assign_unop ~accu_op ~lhs ~un_op ~rhs ?projections ~proj_in_scope () =
let initialize_neutral, accu_op = assignment_op accu_op in
(* FIXME: I think this ignores the slot information here! Just assuming [projections] is
as-should-be, but that's not consistent with omitting the projections arg (assuming it
comes from the context). *)
let setup_l = setup_array ~punned ~bad_pun_hints ~is_lhs:true @@ loop ~proj_in_scope lhs in
let setup_r = setup_array ~punned ~bad_pun_hints ~is_lhs:false @@ loop ~proj_in_scope rhs in
let initialize_neutral = if initialize_neutral then [%expr true] else [%expr false] in
let projections =
match projections with
| Some prjs -> prjs
| None ->
let lhs_dims = project_p_dims "LHS" lhs.pexp_loc setup_l.slot in
let rhs1_dims = project_p_dims "RHS1" lhs.pexp_loc setup_r.slot in
let project_lhs = project_p_slot "LHS" lhs.pexp_loc setup_l.slot in
let project_rhs1 = project_p_slot "RHS1" rhs.pexp_loc setup_r.slot in
[%expr
lazy
(let p = Lazy.force projections in
Arrayjit.Indexing.
{
product_space = p.product_space;
product_iterators = p.product_iterators;
lhs_dims = [%e lhs_dims];
rhs_dims = [| [%e rhs1_dims] |];
project_lhs = [%e project_lhs];
project_rhs = [| [%e project_rhs1] |];
debug_info =
{
p.debug_info with
trace =
( "ppx_cd " ^ [%e expr2string_or_empty accu_op] ^ " "
^ [%e expr2string_or_empty un_op],
Arrayjit.Indexing.unique_debug_id () )
:: p.debug_info.trace;
};
})]
in
(* TODO: might be better to treat missing [rhs] as zeros or errors rather than eliding the
code. *)
let body =
[%expr
Option.value ~default:Arrayjit.Assignments.Noop
@@ Option.map2 [%e setup_l.array_opt] [%e setup_r.array_opt] ~f:(fun lhs rhs ->
Arrayjit.Assignments.Accum_unop
{
initialize_neutral = [%e initialize_neutral];
accum = [%e accu_op];
lhs;
op = [%e un_op];
rhs;
projections = [%e projections];
})]
in
assignment ~punned ~lhs:setup_l ~rhses:[ setup_r ] body
in
let process_raw_binop ~accu_op ~lhs ~bin_op ~rhs1 ~rhs2 ~logic =
let initialize_neutral, accu_op = assignment_op accu_op in
let setup_l = setup_array ~punned ~bad_pun_hints ~is_lhs:true @@ loop ~proj_in_scope lhs in
let setup_r1 = setup_array ~punned ~bad_pun_hints ~is_lhs:false @@ loop ~proj_in_scope rhs1 in
let setup_r2 = setup_array ~punned ~bad_pun_hints ~is_lhs:false @@ loop ~proj_in_scope rhs2 in
let initialize_neutral = if initialize_neutral then [%expr true] else [%expr false] in
let t_expr, lhs_is_grad, _ = args_for ~loc setup_l in
let t1_expr, rhs1_is_grad, rhs1_is_merge = args_for ~loc setup_r1 in
let t2_expr, rhs2_is_grad, rhs2_is_merge = args_for ~loc setup_r2 in
let body =
[%expr
Tensor.raw_binop ~initialize_neutral:[%e initialize_neutral] ~accum:[%e accu_op]
~t:[%e t_expr] ~lhs_is_grad:[%e lhs_is_grad] ~op:[%e bin_op] ~t1:[%e t1_expr]
~rhs1_is_grad:[%e rhs1_is_grad] ~rhs1_is_merge:[%e rhs1_is_merge] ~t2:[%e t2_expr]
~rhs2_is_grad:[%e rhs2_is_grad] ~rhs2_is_merge:[%e rhs2_is_merge] ~logic:[%e logic]]
in
assignment ~punned ~lhs:setup_l ~rhses:[ setup_r1; setup_r2 ] body
in
let process_raw_unop ~accu_op ~lhs ~un_op ~rhs ~logic =
let initialize_neutral, accu_op = assignment_op accu_op in
let setup_l = setup_array ~punned ~bad_pun_hints ~is_lhs:true @@ loop ~proj_in_scope lhs in
let setup_r = setup_array ~punned ~bad_pun_hints ~is_lhs:false @@ loop ~proj_in_scope rhs in
let initialize_neutral = if initialize_neutral then [%expr true] else [%expr false] in
let t_expr, lhs_is_grad, _ = args_for ~loc setup_l in
let t1_expr, rhs_is_grad, rhs_is_merge = args_for ~loc setup_r in
let body =
[%expr
Tensor.raw_unop ~initialize_neutral:[%e initialize_neutral] ~accum:[%e accu_op]
~t:[%e t_expr] ~lhs_is_grad:[%e lhs_is_grad] ~op:[%e un_op] ~t1:[%e t1_expr]
~rhs_is_grad:[%e rhs_is_grad] ~rhs_is_merge:[%e rhs_is_merge] ~logic:[%e logic]]
in
assignment ~punned ~lhs:setup_l ~rhses:[ setup_r ] body
in
match expr with
| { pexp_desc = Pexp_constant (Pconst_float _); _ } ->
{ default_result with expr = [%expr NTDSL.number [%e expr]] }
| { pexp_desc = Pexp_constant (Pconst_integer _); _ } ->
{ default_result with expr = [%expr NTDSL.number (Float.of_int [%e expr])] }
| [%expr
[%e? { pexp_desc = Pexp_constant (Pconst_char ch); pexp_loc; _ }]
[%e? { pexp_desc = Pexp_constant (Pconst_float _); _ } as f]] ->
let axis =
Ast_helper.Exp.constant ~loc:pexp_loc (Pconst_string (String.of_char ch, pexp_loc, None))
in
{ default_result with expr = [%expr NTDSL.number ~axis_label:[%e axis] [%e f]] }
| [%expr
[%e? { pexp_desc = Pexp_constant (Pconst_char ch); pexp_loc; _ }]
[%e? { pexp_desc = Pexp_constant (Pconst_integer _); _ } as i]] ->
let axis =
Ast_helper.Exp.constant ~loc:pexp_loc (Pconst_string (String.of_char ch, pexp_loc, None))
in
{
default_result with
expr = [%expr NTDSL.number ~axis_label:[%e axis] (Float.of_int [%e i])];
}
| { pexp_desc = Pexp_constant (Pconst_string (name, str_loc, _)); _ } ->
{
default_result with
typ = No_grad_tensor_intro { name; name_expr = expr };
expr = A.Exp.ident ~loc:str_loc { txt = Lident name; loc = str_loc };
}
| { pexp_desc = Pexp_array _; _ }
| { pexp_desc = Pexp_construct ({ txt = Lident "::"; _ }, _); _ } ->
{ default_result with expr = ndarray_op expr }
| { pexp_desc = Pexp_ident { txt = Lident ("v" | "lhs"); _ }; _ } ->
{ default_result with typ = Array; slot = LHS }
| { pexp_desc = Pexp_ident { txt = Lident "g"; _ }; _ } ->
{ default_result with typ = Array; slot = LHS }
| { pexp_desc = Pexp_ident { txt = Lident "rhs1"; _ }; _ } ->
{ default_result with typ = Array; slot = RHS1 }
| { pexp_desc = Pexp_ident { txt = Lident "t1"; _ }; _ } ->
{ default_result with slot = RHS1; expr }
| { pexp_desc = Pexp_ident { txt = Lident "v1"; _ }; _ } ->
{ default_result with typ = Array; slot = RHS1; expr = [%expr t1.Tensor.value] }
| { pexp_desc = Pexp_ident { txt = Lident "g1"; _ }; _ } ->
{
default_result with
typ = Grad_of_tensor [%expr t1];
slot = RHS1;
expr = [%expr Option.map t1.Tensor.diff ~f:(fun d -> d.Tensor.grad)];
}
| { pexp_desc = Pexp_ident { txt = Lident "rhs2"; _ }; _ } ->
{ default_result with typ = Array; slot = RHS2 }
| { pexp_desc = Pexp_ident { txt = Lident "t2"; _ }; _ } ->
{ default_result with typ = Tensor; slot = RHS2 }
| { pexp_desc = Pexp_ident { txt = Lident "v2"; _ }; _ } ->
{ default_result with typ = Array; slot = RHS2; expr = [%expr t2.Tensor.value] }
| { pexp_desc = Pexp_ident { txt = Lident "g2"; _ }; _ } ->
{
default_result with
typ = Grad_of_tensor [%expr t2];
slot = RHS2;
expr = [%expr Option.map t2.Tensor.diff ~f:(fun d -> d.Tensor.grad)];
}
| { pexp_desc = Pexp_ident { txt = Lident op_ident; _ }; _ } when is_operator op_ident ->
default_result
| [%expr [%e? expr1] **. [%e? { pexp_desc = Pexp_constant (Pconst_integer _); _ } as i]] ->
(* FIXME: `**.` should take a tensor and require that it's a literal. *)
(* We need to hardcode these two patterns to prevent the numbers from being converted to tensors. *)
let res1 = loop ~proj_in_scope expr1 in
{
res1 with
typ = Tensor;
expr = [%expr NTDSL.O.( **. ) [%e res1.expr] (Float.of_int [%e i])];
}
| [%expr [%e? expr1] **. [%e? expr2]] ->
let res1 = loop ~proj_in_scope expr1 in
{ res1 with typ = Tensor; expr = [%expr NTDSL.O.( **. ) [%e res1.expr] [%e expr2]] }
| [%expr
[%e? expr1]
*+ [%e? { pexp_desc = Pexp_constant (Pconst_string (spec_str, _, _)); _ } as spec]
[%e? expr2]]
when String.contains spec_str '>' ->
let res1 = loop ~proj_in_scope expr1 in
let res2 = loop ~proj_in_scope expr2 in
let slot =
Option.value ~default:Undet
@@ List.find ~f:(function Undet -> false | _ -> true) [ res1.slot; res2.slot ]
in
{
vbs = reduce_vbss [ res1.vbs; res2.vbs ];
typ = Tensor;
slot;
expr = [%expr NTDSL.einsum [%e spec] [%e res1.expr] [%e res2.expr]];
array_opt_of_code = None;
}
| [%expr
[%e? expr1]
++ [%e? { pexp_desc = Pexp_constant (Pconst_string (spec_str, _, _)); _ } as spec]]
when String.contains spec_str '>' ->
let res1 = loop ~proj_in_scope expr1 in
{ res1 with typ = Tensor; expr = [%expr NTDSL.einsum1 [%e spec] [%e res1.expr]] }
| [%expr [%e? expr1].grad] -> (
let res1 = loop ~proj_in_scope expr1 in
match res1.typ with
| Unknown | Tensor | No_grad_tensor_intro _ ->
{
res1 with
typ = Grad_of_tensor expr1;
expr = [%expr Option.map [%e res1.expr].Tensor.diff ~f:(fun d -> d.Tensor.grad)];
(* It's never a good idea to embed backprop code outside of a proper backprop pass. *)
}
| Merge_value _ ->
{
res1 with
typ = Merge_grad expr1;
expr =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: write .grad.merge instead of .merge.grad";
}
| Code | Array | Value_of_tensor _ | Grad_of_tensor _ | Merge_grad _ ->
{
res1 with
typ = Array;
expr =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc "ppx_ocannl %%cd: only tensors have a gradient";
})
| [%expr [%e? expr1].value] -> (
let res1 = loop ~proj_in_scope expr1 in
(* TODO: maybe this is too permissive? E.g. [t1.grad.value] is accepted. *)
match res1.typ with
| Unknown | Tensor | No_grad_tensor_intro _ ->
{
res1 with
typ = Value_of_tensor res1.expr;
expr = [%expr [%e res1.expr].Tensor.value];
}
| Code ->
{
default_result with
typ = Array;
slot = res1.slot;
expr =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: <code>.value notation not supported when <code> is not a \
tensor";
}
| Array | Value_of_tensor _ | Grad_of_tensor _ | Merge_value _ | Merge_grad _ -> res1)
| [%expr [%e? expr1].merge] -> (
let res1 = loop ~proj_in_scope expr1 in
match res1.typ with
| Unknown | Tensor | No_grad_tensor_intro _ ->
{ res1 with typ = Merge_value res1.expr; expr = [%expr [%e res1.expr].Tensor.value] }
| Value_of_tensor t ->
{ res1 with typ = Merge_value t; expr = [%expr [%e res1.expr].Tensor.value] }
| Array | Code ->
{
res1 with
typ = Array;
expr =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: only tensor nodes (e.g. `.value` or `.grad`) can be merged";
}
| Grad_of_tensor t -> { res1 with vbs = no_vbs; typ = Merge_grad t }
| Merge_value _ | Merge_grad _ ->
{
res1 with
expr =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc "ppx_ocannl %%cd: repeated .merge not allowed";
})
| [%expr
~~([%e? { pexp_desc = Pexp_constant (Pconst_string _); _ } as comment];
[%e? expr2])] ->
let res2 = loop ~proj_in_scope expr2 in
{
res2 with
expr =
[%expr
let __comment_block = [%e res2.expr] in
{
Arrayjit.Assignments.asgns =
Arrayjit.Assignments.Block_comment
([%e comment], __comment_block.Arrayjit.Assignments.asgns);
embedded_nodes = __comment_block.Arrayjit.Assignments.embedded_nodes;
}];
}
| [%expr
~~([%e? { pexp_desc = Pexp_apply (expr, exprs); pexp_loc; _ }];
[%e? expr2])] ->
let elements =
expr :: List.map ~f:snd exprs
|> List.map ~f:(function
| { pexp_desc = Pexp_constant (Pconst_string _); _ } as s -> s
| [%expr [%e? t].value] -> [%expr Arrayjit.Tnode.debug_name [%e t].value]
| [%expr [%e? t].grad] -> [%expr Arrayjit.Tnode.debug_name [%e t].value ^ ".grad"]
| t -> [%expr Arrayjit.Tnode.debug_name [%e t].value])
in
let res2 = loop ~proj_in_scope expr2 in
{
res2 with
expr =
[%expr
let __comment_block = [%e res2.expr] in
{
Arrayjit.Assignments.asgns =
Arrayjit.Assignments.Block_comment
( String.concat_array ~sep:" " [%e Ast_helper.Exp.array ~loc:pexp_loc elements],
__comment_block.Arrayjit.Assignments.asgns );
embedded_nodes = __comment_block.Arrayjit.Assignments.embedded_nodes;
}];
}
| [%expr
[%e? accu_op]
[%e? lhs]
([%e? bin_op] [%e? rhs1] ([%e? rhs2] ~projections:[%e? projections]))] ->
process_assign_binop ~accu_op ~lhs ~bin_op ~rhs1 ~rhs2 ~projections ~proj_in_scope:true ()
| [%expr [%e? accu_op] [%e? lhs] (([%e? un_op] [%e? rhs]) ~projections:[%e? projections])]
| [%expr [%e? accu_op] [%e? lhs] ([%e? un_op] ([%e? rhs] ~projections:[%e? projections]))] ->
let _, un_op = unary_op un_op in
(* Handle both un_op priority levels -- where application binds tighter and less tight. *)
process_assign_unop ~accu_op ~lhs ~un_op ~rhs ~projections ~proj_in_scope:true ()
| [%expr [%e? accu_op] [%e? lhs] ([%e? rhs] ~projections:[%e? projections])] ->
process_assign_unop ~accu_op ~lhs ~un_op:[%expr Arrayjit.Ops.Identity] ~rhs ~projections
~proj_in_scope:true ()
| [%expr
[%e? accu_op]
[%e? lhs]
([%e? bin_op]
[%e? rhs1]
([%e? rhs2]
~logic:
[%e? { pexp_desc = Pexp_constant (Pconst_string (spec, s_loc, _)); _ } as logic]))]
->
let logic =
let loc = s_loc in
if String.equal spec "." then [%expr Shape.Pointwise_bin]
else if String.equal spec "@" then [%expr Shape.Compose]
else [%expr Shape.Einsum [%e logic]]
in
let _, bin_op = binary_op bin_op in
process_raw_binop ~accu_op ~lhs ~bin_op ~rhs1 ~rhs2 ~logic
| [%expr
[%e? accu_op]
[%e? lhs]
(([%e? un_op] [%e? rhs])
~logic:[%e? { pexp_desc = Pexp_constant (Pconst_string (spec, s_loc, _)); _ } as logic])]
| [%expr
[%e? accu_op]
[%e? lhs]
([%e? un_op]
([%e? rhs]
~logic:
[%e? { pexp_desc = Pexp_constant (Pconst_string (spec, s_loc, _)); _ } as logic]))]
->
(* Handle both un_op priority levels -- where application binds tighter and less tight. *)
let logic =
let loc = s_loc in
if String.equal spec "." then [%expr Shape.Pointwise_un]
else if String.equal spec "T" then [%expr Shape.Transpose]
else [%expr Shape.Permute [%e logic]]
in
let _, un_op = unary_op un_op in
process_raw_unop ~accu_op ~lhs ~un_op ~rhs ~logic
| [%expr
[%e? { pexp_desc = Pexp_ident { txt = Lident accu_ident; _ }; _ } as accu_op]
[%e? lhs]
([%e? { pexp_desc = Pexp_ident { txt = Lident binop_ident; _ }; _ } as bin_op]
[%e? rhs1]
[%e? rhs2])]
when is_assignment accu_ident && is_binary_op binop_ident && proj_in_scope ->
process_assign_binop ~accu_op ~lhs ~bin_op ~rhs1 ~rhs2 ~proj_in_scope ()
| [%expr
[%e? { pexp_desc = Pexp_ident { txt = Lident accu_ident; _ }; _ } as accu_op]
[%e? lhs]
([%e? { pexp_desc = Pexp_ident { txt = Lident unop_ident; _ }; _ } as un_op] [%e? rhs])]
when is_assignment accu_ident && is_unary_op unop_ident && proj_in_scope ->
let _, un_op = unary_op un_op in
process_assign_unop ~accu_op ~lhs ~un_op ~rhs ~proj_in_scope ()
| [%expr
[%e? { pexp_desc = Pexp_ident { txt = Lident op_ident; _ }; _ } as accu_op]
[%e? lhs]
[%e? rhs]]
when is_assignment op_ident && proj_in_scope ->
process_assign_unop ~accu_op ~lhs ~un_op:[%expr Arrayjit.Ops.Identity] ~rhs ~proj_in_scope
()
| [%expr
[%e? { pexp_desc = Pexp_ident { txt = Lident accu_ident; _ }; _ } as accu_op]
[%e? lhs]
([%e? { pexp_desc = Pexp_ident { txt = Lident binop_ident; _ }; _ } as bin_op]
[%e? rhs1]
[%e? rhs2])]
when is_assignment accu_ident && is_binary_op binop_ident ->
let logic, bin_op = binary_op bin_op in
process_raw_binop ~accu_op ~lhs ~bin_op ~rhs1 ~rhs2 ~logic
| [%expr
[%e? { pexp_desc = Pexp_ident { txt = Lident accu_ident; _ }; _ } as accu_op]
[%e? lhs]
([%e? { pexp_desc = Pexp_ident { txt = Lident unop_ident; _ }; _ } as un_op] [%e? rhs])]
when is_assignment accu_ident && is_unary_op unop_ident ->
let logic, un_op = unary_op un_op in
process_raw_unop ~accu_op ~lhs ~un_op ~rhs ~logic
| [%expr
[%e? { pexp_desc = Pexp_ident { txt = Lident op_ident; _ }; _ } as accu_op]
[%e? lhs]
[%e? rhs]]
when is_assignment op_ident ->
process_raw_unop ~accu_op ~lhs ~un_op:[%expr Arrayjit.Ops.Identity] ~rhs
~logic:[%expr Shape.Pointwise_un]
| [%expr [%e? expr1] [%e? expr2] [%e? expr3]] ->
let res1 = loop ~proj_in_scope expr1 in
let res2 = loop ~proj_in_scope expr2 in
let res3 = loop ~proj_in_scope expr3 in
let slot =
Option.value ~default:Undet
@@ List.find
~f:(function Undet -> false | _ -> true)
[ res1.slot; res2.slot; res3.slot ]
in
{
vbs = reduce_vbss [ res1.vbs; res2.vbs; res3.vbs ];
typ = res1.typ;
slot;
expr = [%expr [%e res1.expr] [%e res2.expr] [%e res3.expr]];
array_opt_of_code = None;
}
| [%expr [%e? expr1] [%e? expr2]] ->
let res1 = loop ~proj_in_scope expr1 in
let res2 = loop ~proj_in_scope expr2 in
let slot =
Option.value ~default:Undet
@@ List.find ~f:(function Undet -> false | _ -> true) [ res1.slot; res2.slot ]
in
{
vbs = reduce_vbss [ res1.vbs; res2.vbs ];
typ = res1.typ;
slot;
expr = [%expr [%e res1.expr] [%e res2.expr]];
array_opt_of_code = None;
}
| { pexp_desc = Pexp_fun ((arg_label : arg_label), arg, pat, expr1); _ } as expr ->
let proj_in_scope =
proj_in_scope
||
match arg_label with
| (Labelled s | Optional s) when String.equal s "projections" -> true
| _ -> false
in
let bad_pun_hints = Set.union bad_pun_hints @@ collect_pat_idents pat in
let res1 = transl ~bad_pun_hints ~proj_in_scope expr1 in
{ res1 with expr = { expr with pexp_desc = Pexp_fun (arg_label, arg, pat, res1.expr) } }
| [%expr
while [%e? _test_expr] do
[%e? _body]
done] ->
{
default_result with
typ = Code;
slot = Nonslot;
expr =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: while: low-level code embeddings not supported yet";
}
| [%expr
for [%p? _pat] = [%e? _init] to [%e? _final] do
[%e? _body_expr]
done] ->
{
default_result with
typ = Code;
slot = Nonslot;
expr =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: for-to: low-level code embeddings not supported yet";
}
| [%expr
for [%p? _pat] = [%e? _init] downto [%e? _final] do
[%e? _body_expr]
done] ->
{
default_result with
typ = Code;
slot = Nonslot;
expr =
Ast_builder.Default.pexp_extension ~loc
@@ Location.error_extensionf ~loc
"ppx_ocannl %%cd: for-downto: low-level code embeddings not supported yet";
}
| [%expr
[%e? expr1];
[%e? expr2]] ->
let res1 = loop ~proj_in_scope expr1 in
let res2 = loop ~proj_in_scope expr2 in
{
vbs = reduce_vbss [ res1.vbs; res2.vbs ];
typ = Code;
slot = Nonslot;
expr = [%expr Arrayjit.Assignments.sequence [ [%e res1.expr]; [%e res2.expr] ]];
array_opt_of_code = res2.array_opt_of_code;
}