/
symreg.c
1706 lines (1206 loc) · 35.8 KB
/
symreg.c
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
/*
* Copyright (C) 2002-2010, Parrot Foundation.
*/
/*
=head1 NAME
compilers/imcc/symreg.c
=head1 DESCRIPTION
imcc symbol handling
XXX: SymReg stuff has become overused. SymReg should be for symbolic
registers, reg allocation, etc. but we are now using it for extensive
symbol table management. Need to convert much of this over the use Symbol
and SymbolTable (see symbol.h and symbol.c)
=head2 Functions
=over 4
=cut
*/
#include "imc.h"
/* Code: */
/* HEADERIZER HFILE: compilers/imcc/symreg.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static SymReg * _get_sym_typed(
ARGIN(const SymHash *hsh),
ARGIN(const char *name),
int t)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_MALLOC
static char * _mk_fullname(
ARGMOD(imc_info_t * imcc),
ARGIN_NULLOK(const Namespace *ns),
ARGIN(const char *name))
__attribute__nonnull__(1)
__attribute__nonnull__(3)
FUNC_MODIFIES(* imcc);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static SymReg * _mk_symreg(
ARGMOD(imc_info_t * imcc),
ARGMOD(SymHash *hsh),
ARGIN(const char *name),
int t)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(* imcc)
FUNC_MODIFIES(*hsh);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_MALLOC
static char * add_ns(ARGMOD(imc_info_t * imcc), ARGIN(const char *name))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(* imcc);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static SymReg * get_sym_by_name(
ARGIN(const SymHash *hsh),
ARGIN(const char *name))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
static int int_overflows(ARGIN(const SymReg *r))
__attribute__nonnull__(1);
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static SymReg * mk_pmc_const_2(
ARGMOD(imc_info_t * imcc),
ARGMOD(IMC_Unit *unit),
ARGIN(SymReg *left),
ARGMOD(SymReg *rhs))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(* imcc)
FUNC_MODIFIES(*unit)
FUNC_MODIFIES(*rhs);
static void resize_symhash(ARGMOD(imc_info_t * imcc), ARGMOD(SymHash *hsh))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(* imcc)
FUNC_MODIFIES(*hsh);
#define ASSERT_ARGS__get_sym_typed __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(hsh) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS__mk_fullname __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(imcc) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS__mk_symreg __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(imcc) \
, PARROT_ASSERT_ARG(hsh) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_add_ns __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(imcc) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_get_sym_by_name __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(hsh) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_int_overflows __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(r))
#define ASSERT_ARGS_mk_pmc_const_2 __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(imcc) \
, PARROT_ASSERT_ARG(unit) \
, PARROT_ASSERT_ARG(left) \
, PARROT_ASSERT_ARG(rhs))
#define ASSERT_ARGS_resize_symhash __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(imcc) \
, PARROT_ASSERT_ARG(hsh))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/*
=item C<void push_namespace(imc_info_t * imcc, const char *name)>
Begins a new namespace in PASM/PIR, named after the given C<name>.
=cut
*/
void
push_namespace(ARGMOD(imc_info_t * imcc), ARGIN(const char *name))
{
ASSERT_ARGS(push_namespace)
Namespace * const ns = mem_gc_allocate_zeroed_typed(imcc->interp, Namespace);
ns->parent = imcc->namespace_stack;
ns->name = mem_sys_strdup(name);
imcc->namespace_stack = ns;
}
/*
=item C<void pop_namespace(imc_info_t * imcc, const char *name)>
Ends the current namespace, popping back to the previous. If the namespace
stack is empty, throws a syntax error.
=cut
*/
void
pop_namespace(ARGMOD(imc_info_t * imcc), ARGIN(const char *name))
{
ASSERT_ARGS(pop_namespace)
Namespace * const ns = imcc->namespace_stack;
if (!ns)
IMCC_fataly(imcc, EXCEPTION_SYNTAX_ERROR, "pop() on empty namespace stack\n");
if (name && !STREQ(name, ns->name))
IMCC_fataly(imcc, EXCEPTION_SYNTAX_ERROR, "tried to pop namespace(%s), "
"but top of stack is namespace(%s)\n", name, ns->name);
while (ns->idents) {
Identifier * const ident = ns->idents;
ns->idents = ident->next;
mem_sys_free(ident);
}
imcc->namespace_stack = ns->parent;
mem_sys_free(ns);
}
/*
=item C<static SymReg * _get_sym_typed(const SymHash *hsh, const char *name, int
t)>
Gets a symbol from the hash, with the given C<name> of the specific type C<t>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static SymReg *
_get_sym_typed(ARGIN(const SymHash *hsh), ARGIN(const char *name), int t)
{
ASSERT_ARGS(_get_sym_typed)
SymReg *p;
const unsigned int i = hash_str(name) % hsh->size;
for (p = hsh->data[i]; p; p = p->next) {
if ((t == p->set) && STREQ(name, p->name))
return p;
}
return NULL;
}
/*
=item C<static SymReg * get_sym_by_name(const SymHash *hsh, const char *name)>
Gets a symbol from the hash, with the given C<name>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static SymReg *
get_sym_by_name(ARGIN(const SymHash *hsh), ARGIN(const char *name))
{
ASSERT_ARGS(get_sym_by_name)
SymReg *p;
const unsigned int i = hash_str(name) % hsh->size;
for (p = hsh->data[i]; p; p = p->next) {
if (STREQ(name, p->name))
return p;
}
return NULL;
}
/* symbolic registers */
/*
=item C<static SymReg * _mk_symreg(imc_info_t * imcc, SymHash *hsh, const char
*name, int t)>
Makes a new SymReg in the given SymHash from a varname and type.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static SymReg *
_mk_symreg(ARGMOD(imc_info_t * imcc), ARGMOD(SymHash *hsh),
ARGIN(const char *name), int t)
{
ASSERT_ARGS(_mk_symreg)
SymReg * r = _get_sym_typed(hsh, name, t);
if (!r) {
r = mem_gc_allocate_zeroed_typed(imcc->interp, SymReg);
r->set = t;
r->type = VTREG;
r->name = mem_sys_strdup(name);
r->color = -1;
r->want_regno = -1;
_store_symreg(imcc, hsh, r);
}
return r;
}
/*
=item C<SymReg * mk_symreg(imc_info_t * imcc, const char *name, int t)>
Makes a new SymReg in the current unit, given a varname and type.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_symreg(ARGMOD(imc_info_t * imcc), ARGIN(const char *name), int t)
{
ASSERT_ARGS(mk_symreg)
IMC_Unit * const unit = imcc->cur_unit;
/* Check for the condition that fires up a segfault in TT #162 */
PARROT_ASSERT(unit != NULL);
return _mk_symreg(imcc, &unit->hash, name, t);
}
/*
=item C<char * symreg_to_str(const SymReg *s)>
Dumps a SymReg to a printable format.
=cut
*/
PARROT_MALLOC
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
char *
symreg_to_str(ARGIN(const SymReg *s))
{
ASSERT_ARGS(symreg_to_str)
/* NOTE: the below magic number encompasses all the quoted strings which
* may be included in the sprintf output (for now) */
char * const buf = (char *)mem_sys_allocate(250 + strlen(s->name));
const int t = s->type;
sprintf(buf, "symbol [%s] set [%c] color [" INTVAL_FMT "] type [",
s->name, s->set, s->color);
if (t & VTCONST) { strcat(buf, "VTCONST "); }
if (t & VTREG) { strcat(buf, "VTREG "); }
if (t & VTIDENTIFIER) { strcat(buf, "VTIDENTIFIER "); }
if (t & VTADDRESS) { strcat(buf, "VTADDRESS "); }
if (t & VTREGKEY) { strcat(buf, "VTREGKEY "); }
if (t & VTPASM) { strcat(buf, "VTPASM "); }
if (t & VT_CONSTP) { strcat(buf, "VT_CONSTP "); }
if (t & VT_PCC_SUB) { strcat(buf, "VT_PCC_SUB "); }
if (t & VT_FLAT) { strcat(buf, "VT_FLAT "); }
if (t & VT_OPTIONAL) { strcat(buf, "VT_OPTIONAL "); }
if (t & VT_NAMED) { strcat(buf, "VT_NAMED "); }
if (t & VT_CALL_SIG) { strcat(buf, "VT_CALL_SIG "); }
strcat(buf, "]");
return buf;
}
/*
=item C<SymReg * mk_temp_reg(imc_info_t * imcc, int t)>
Makes a new unique and temporary SymReg of the specified type C<t>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_temp_reg(ARGMOD(imc_info_t * imcc), int t)
{
ASSERT_ARGS(mk_temp_reg)
char buf[30];
/* XXX non-reentrant */
/* TODO: Fix this */
static int temp;
snprintf(buf, sizeof (buf), "__imcc_temp_%d", ++temp);
return mk_symreg(imcc, buf, t);
}
/*
=item C<SymReg * mk_pcc_sub(imc_info_t * imcc, const char *name, int proto)>
Makes a SymReg representing a PCC sub of the given C<name> with the specified
type.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_pcc_sub(ARGMOD(imc_info_t * imcc), ARGIN(const char *name), int proto)
{
ASSERT_ARGS(mk_pcc_sub)
IMC_Unit * const unit = imcc->cur_unit;
SymReg * const r = _mk_symreg(imcc, &unit->hash, name, proto);
r->type = VT_PCC_SUB;
r->pcc_sub = mem_gc_allocate_zeroed_typed(imcc->interp, pcc_sub_t);
return r;
}
/*
=item C<void add_namespace(imc_info_t * imcc, IMC_Unit *unit)>
Add the current namespace (and HLL id) to a sub declaration.
=cut
*/
void
add_namespace(ARGMOD(imc_info_t * imcc), ARGMOD(IMC_Unit *unit))
{
ASSERT_ARGS(add_namespace)
SymReg * const ns = imcc->cur_namespace;
unit->hll_id = Parrot_pcc_get_HLL(imcc->interp, CURRENT_CONTEXT(imcc->interp));
if (!ns)
return;
if (unit->_namespace)
return;
if (unit->prev && unit->prev->_namespace == ns)
unit->_namespace = ns;
else {
SymReg * const g = dup_sym(imcc, ns);
SymReg * const r = _get_sym(&imcc->ghash, g->name);
unit->_namespace = g;
g->reg = ns;
g->type = VT_CONSTP;
/* this unit should free its namespace only if it's the only thing
* holding onto it */
if (!r || r->type != VT_CONSTP) {
_store_symreg(imcc, &imcc->ghash, g);
unit->owns_namespace = 0;
}
else
unit->owns_namespace = 1;
}
}
/*
=item C<void add_pcc_arg(imc_info_t * imcc, SymReg *r, SymReg *arg)>
Adds a register or constant to the function arg list.
=cut
*/
void
add_pcc_arg(ARGMOD(imc_info_t * imcc), ARGMOD(SymReg *r), ARGMOD(SymReg *arg))
{
ASSERT_ARGS(add_pcc_arg)
pcc_sub_t * const sub = r->pcc_sub;
const int n = sub->nargs;
sub->args = mem_gc_realloc_n_typed(imcc->interp, sub->args, n + 1, SymReg *);
sub->arg_flags = mem_gc_realloc_n_typed(imcc->interp, sub->arg_flags, n + 1, int);
sub->args[n] = arg;
sub->arg_flags[n] = arg->type;
arg->type &= ~(VT_FLAT|VT_OPTIONAL|VT_OPT_FLAG|VT_NAMED|VT_CALL_SIG);
sub->nargs++;
}
/*
=item C<void add_pcc_result(imc_info_t * imcc, SymReg *r, SymReg *arg)>
Adds a register or constant to the function's return list.
=cut
*/
void
add_pcc_result(ARGMOD(imc_info_t * imcc), ARGMOD(SymReg *r), ARGMOD(SymReg *arg))
{
ASSERT_ARGS(add_pcc_result)
pcc_sub_t * const sub = r->pcc_sub;
const int n = sub->nret;
sub->ret = mem_gc_realloc_n_typed(imcc->interp, sub->ret, n + 1, SymReg *);
sub->ret_flags = mem_gc_realloc_n_typed(imcc->interp, sub->ret_flags, n + 1, int);
/* we can't keep the flags in the SymReg as the SymReg
* maybe used with different flags for different calls */
sub->ret[n] = arg;
sub->ret_flags[n] = arg->type;
arg->type &= ~(VT_FLAT|VT_OPTIONAL|VT_OPT_FLAG|VT_NAMED);
sub->nret++;
}
/*
=item C<void add_pcc_multi(imc_info_t * imcc, SymReg *r, SymReg *arg)>
Adds a :multi signature to the sub.
=cut
*/
void
add_pcc_multi(ARGMOD(imc_info_t * imcc), ARGMOD(SymReg *r), ARGIN_NULLOK(SymReg *arg))
{
ASSERT_ARGS(add_pcc_multi)
pcc_sub_t * const sub = r->pcc_sub;
const int n = sub->nmulti;
sub->multi = mem_gc_realloc_n_typed(imcc->interp, sub->multi, n + 1, SymReg *);
sub->multi[n] = arg;
sub->nmulti++;
}
/*
=item C<void add_pcc_sub(SymReg *r, SymReg *arg)>
Sets the current sub in the given SymReg to the second SymReg.
=cut
*/
void
add_pcc_sub(ARGMOD(SymReg *r), ARGIN(SymReg *arg))
{
ASSERT_ARGS(add_pcc_sub)
r->pcc_sub->sub = arg;
}
/*
=item C<void add_pcc_cc(SymReg *r, SymReg *arg)>
Adds a continuation (?) to the current sub.
=cut
*/
void
add_pcc_cc(ARGMOD(SymReg *r), ARGIN(SymReg *arg))
{
ASSERT_ARGS(add_pcc_cc)
r->pcc_sub->cc = arg;
}
/*
=item C<SymReg * mk_pasm_reg(imc_info_t * imcc, const char *name)>
Makes a SymReg representing a PASM register.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_pasm_reg(ARGMOD(imc_info_t * imcc), ARGIN(const char *name))
{
ASSERT_ARGS(mk_pasm_reg)
SymReg *r = _get_sym(&imcc->cur_unit->hash, name);
if (!r) {
r = mk_symreg(imcc, name, *name);
r->type = VTPASM;
r->color = atoi(name + 1);
if (r->color < 0)
IMCC_fataly(imcc, EXCEPTION_SYNTAX_ERROR,
"register number out of range '%s'\n", name);
}
return r;
}
/*
=item C<static char * _mk_fullname(imc_info_t * imcc, const Namespace *ns, const
char *name)>
Combines the namespace and name together, separated by a C<::>. If there's no
namespace, the name is returned on its own.
The returned string must be free()d.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_MALLOC
static char *
_mk_fullname(ARGMOD(imc_info_t * imcc), ARGIN_NULLOK(const Namespace *ns), ARGIN(const char *name))
{
ASSERT_ARGS(_mk_fullname)
if (ns) {
const size_t len = strlen(name) + strlen(ns->name) + 3;
char *result = mem_gc_allocate_n_typed(imcc->interp, len, char);
snprintf(result, len, "%s::%s", ns->name, name);
return result;
}
return mem_sys_strdup(name);
}
/*
=item C<SymReg * mk_ident(imc_info_t * imcc, const char *name, int t, INTVAL
type)>
Makes a new identifier.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PARROT_IGNORABLE_RESULT
SymReg *
mk_ident(ARGMOD(imc_info_t * imcc), ARGIN(const char *name), int t, INTVAL type)
{
ASSERT_ARGS(mk_ident)
char * const fullname = _mk_fullname(imcc, imcc->namespace_stack, name);
SymReg *r = get_sym_by_name(&imcc->cur_unit->hash, name);
if (r && (r->set != t || r->type != type))
IMCC_fataly(imcc, EXCEPTION_SYNTAX_ERROR,
"syntax error, duplicated IDENTIFIER '%s'\n", fullname);
r = mk_symreg(imcc, fullname, t);
r->type = type;
if (imcc->namespace_stack) {
Identifier * const ident = mem_gc_allocate_zeroed_typed(imcc->interp, Identifier);
ident->name = fullname;
ident->next = imcc->namespace_stack->idents;
imcc->namespace_stack->idents = ident;
}
else
mem_sys_free(fullname);
return r;
}
/*
=item C<static SymReg * mk_pmc_const_2(imc_info_t * imcc, IMC_Unit *unit, SymReg
*left, SymReg *rhs)>
Makes a constant PMC and inserts instructions to access it.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static SymReg *
mk_pmc_const_2(ARGMOD(imc_info_t * imcc), ARGMOD(IMC_Unit *unit),
ARGIN(SymReg *left), ARGMOD(SymReg *rhs))
{
ASSERT_ARGS(mk_pmc_const_2)
/* XXX This always returns NULL. Probably shouldn't return anything then. */
SymReg *r[3];
char *name;
int len;
if (imcc->state->pasm_file)
IMCC_fataly(imcc, EXCEPTION_SYNTAX_ERROR,
"Ident as PMC constant %s\n", left->name);
r[0] = left;
/* strip delimiters */
name = mem_sys_strdup(rhs->name + 1);
len = strlen(name);
name[len - 1] = '\0';
mem_sys_free(rhs->name);
rhs->name = name;
rhs->set = 'P';
rhs->pmc_type = left->pmc_type;
switch (rhs->pmc_type) {
case enum_class_Sub:
case enum_class_Coroutine:
r[1] = rhs;
rhs->usage |= U_FIXUP;
INS(imcc, unit, "set_p_pc", "", r, 2, 0, 1);
return NULL;
default:
break;
}
r[1] = rhs;
INS(imcc, unit, "set_p_pc", "", r, 2, 0, 1);
return NULL;
}
/*
=item C<SymReg * mk_const_ident(imc_info_t * imcc, const char *name, int t,
SymReg *val, int global)>
Makes a new identifier constant with value val.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PARROT_IGNORABLE_RESULT
SymReg *
mk_const_ident(ARGMOD(imc_info_t * imcc), ARGIN(const char *name), int t,
ARGMOD(SymReg *val), int global)
{
ASSERT_ARGS(mk_const_ident)
SymReg *r;
/*
* Forbid assigning a string to anything other than a string
* or PMC constant
*/
if (t == 'N' || t == 'I') {
if (val->set == 'S')
IMCC_fataly(imcc, EXCEPTION_SYNTAX_ERROR, "bad const initialisation");
/* Cast value to const type */
val->set = t;
}
if (global) {
if (t == 'P')
IMCC_fataly(imcc, EXCEPTION_SYNTAX_ERROR,
"global PMC constant not allowed");
r = _mk_symreg(imcc, &imcc->ghash, name, t);
r->type = VT_CONSTP;
}
else {
r = mk_ident(imcc, name, t, VT_CONSTP);
if (t == 'P')
return mk_pmc_const_2(imcc, imcc->cur_unit, r, val);
}
r->reg = val;
return r;
}
/*
=item C<SymReg * _mk_const(imc_info_t * imcc, SymHash *hsh, const char *name,
int t)>
Makes a new constant (internal use only).
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
_mk_const(ARGMOD(imc_info_t * imcc), ARGMOD(SymHash *hsh),
ARGIN(const char *name), int t)
{
ASSERT_ARGS(_mk_const)
SymReg * const r = _mk_symreg(imcc, hsh, name, t);
r->type = VTCONST;
if (t == 'U') {
/* charset:"string" */
r->set = 'S';
r->type |= VT_ENCODED;
}
/* autopromote big ints to floats
*/
if (t == 'I') {
if (int_overflows(r))
r->set = 'N';
}
r->use_count++;
return r;
}
/*
=item C<static int int_overflows(const SymReg *r)>
Determine whether an integer constant would overflow an C<INTVAL>
register.
=cut
*/
PARROT_WARN_UNUSED_RESULT
static int
int_overflows(ARGIN(const SymReg *r))
{
ASSERT_ARGS(int_overflows)
int base;
const char *digits;
if (r->type & VT_CONSTP)
r = r->reg;
/* Refactor this code to hoist common from functionality between
* this function and IMCC_int_from_reg in pbc.c */
digits = r->name;
base = 10;
if (digits[0] == '0') {
switch (toupper((unsigned char)digits[1])) {
case 'B': base = 2; break;
case 'O': base = 8; break;
case 'X': base = 16; break;
default: break;
}
}
errno = 0;
if (base == 10) {
long int unused = strtol(digits, NULL, base);
UNUSED(unused);
}
else {
unsigned long int unused = strtoul(digits + 2, NULL, base);
UNUSED(unused);
}
return errno ? 1 : 0;
}
/*
=item C<SymReg * mk_const(imc_info_t * imcc, const char *name, int t)>
Makes a new constant (and populates the cache of global symbols).
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_const(ARGMOD(imc_info_t * imcc), ARGIN(const char *name), int t)
{
ASSERT_ARGS(mk_const)
SymHash * const h = &imcc->ghash;
if (!h->data)
create_symhash(imcc, h);
return _mk_const(imcc, h, name, t);
}
/*
=item C<static char * add_ns(imc_info_t * imcc, const char *name)>
Adds a namespace to the current sub.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_MALLOC
static char *
add_ns(ARGMOD(imc_info_t * imcc), ARGIN(const char *name))
{
ASSERT_ARGS(add_ns)
size_t len, l;
char *ns_name, *p;
if (!imcc->cur_namespace
|| (l = strlen(imcc->cur_namespace->name)) <= 2)
return mem_sys_strdup(name);
/* TODO keyed syntax */
len = strlen(name) + l + 4;
ns_name = (char*)mem_sys_allocate(len);
strcpy(ns_name, imcc->cur_namespace->name);
*ns_name = '_';
ns_name[l - 1] = '\0';
strcat(ns_name, "@@@");
strcat(ns_name, name);
p = strstr(ns_name, "\";\""); /* Foo";"Bar -> Foo@@@Bar */
while (p) {
p[0] = '@';
p[1] = '@';
p[2] = '@';
p = strstr(ns_name, "\";\")");
}
return ns_name;
}
/*
=item C<SymReg * _mk_address(imc_info_t * imcc, SymHash *hsh, const char *name,
int uniq)>
Makes a new address (internal use only).
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
_mk_address(ARGMOD(imc_info_t * imcc), ARGMOD(SymHash *hsh),
ARGIN(const char *name), int uniq)
{
ASSERT_ARGS(_mk_address)
SymReg *r;
if (uniq == U_add_all) {
int is_lexical = 0;
r = get_sym_by_name(&imcc->ghash, name);
if (r && r->usage & U_LEXICAL)
is_lexical = 1;
r = mem_gc_allocate_zeroed_typed(imcc->interp, SymReg);
r->type = VTADDRESS;
r->name = mem_sys_strdup(name);
_store_symreg(imcc, hsh, r);
if (is_lexical)
r->usage |= U_LEXICAL;
}
else {
/* Aux var to avoid the need of const casts */
char *aux_name = NULL;
const char * const sub_name = (uniq == U_add_uniq_sub)
/* remember to free this name; add_ns malloc()s it */
? (aux_name = add_ns(imcc, name))
: name;
r = _get_sym(hsh, sub_name);