1 /*-------------------------------------------------------------------------
2 SDCCsymt.c - Code file for Symbols table related structures and MACRO's.
3 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option) any
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 In other words, you are welcome to use, share and improve this program.
20 You are forbidden to forbid anyone else to use, share and improve
21 what you give them. Help stamp out software-hoarding!
22 -------------------------------------------------------------------------*/
27 value *aggregateToPointer (value *val);
29 void printFromToType(sym_link *from, sym_link *to) {
30 fprintf (stderr, "from type '");
31 printTypeChain (from, stderr);
32 fprintf (stderr, "'\nto type '");
33 printTypeChain (to, stderr);
34 fprintf (stderr, "'\n");
38 char *nounName(sym_link *sl) {
39 switch (SPEC_NOUN(sl))
42 if (SPEC_LONG(sl)) return "long";
43 if (sl->select.s._short) return "short";
46 case V_FLOAT: return "float";
47 case V_CHAR: return "char";
48 case V_VOID: return "void";
49 case V_STRUCT: return "struct";
50 case V_LABEL: return "label";
51 case V_BIT: return "bit";
52 case V_SBIT: return "sbit";
53 case V_DOUBLE: return "double";
58 bucket *SymbolTab[256]; /* the symbol table */
59 bucket *StructTab[256]; /* the structure table */
60 bucket *TypedefTab[256]; /* the typedef table */
61 bucket *LabelTab[256]; /* the Label table */
62 bucket *enumTab[256]; /* enumerated table */
64 /*------------------------------------------------------------------*/
65 /* initSymt () - initialises symbol table related stuff */
66 /*------------------------------------------------------------------*/
72 for (i = 0; i < 256; i++)
73 SymbolTab[i] = StructTab[i] = (void *) NULL;
77 /*-----------------------------------------------------------------*/
78 /* newBucket - allocates & returns a new bucket */
79 /*-----------------------------------------------------------------*/
85 bp = Safe_alloc ( sizeof (bucket));
90 /*-----------------------------------------------------------------*/
91 /* hashKey - computes the hashkey given a symbol name */
92 /*-----------------------------------------------------------------*/
94 hashKey (const char *s)
96 unsigned long key = 0;
103 /*-----------------------------------------------------------------*/
104 /* addSym - adds a symbol to the hash Table */
105 /*-----------------------------------------------------------------*/
107 addSym (bucket ** stab,
114 int i; /* index into the hash Table */
115 bucket *bp; /* temp bucket * */
118 symbol *csym = (symbol *)sym;
120 if (getenv("DEBUG_SANITY")) {
121 fprintf (stderr, "addSym: %s ", sname);
123 /* make sure the type is complete and sane */
124 checkTypeSanity(csym->etype, csym->name);
127 /* prevent overflow of the (r)name buffers */
128 if (strlen(sname)>SDCC_SYMNAME_MAX) {
129 werror (W_SYMBOL_NAME_TOO_LONG, SDCC_SYMNAME_MAX);
130 sname[SDCC_SYMNAME_MAX]='\0';
133 /* the symbols are always added at the head of the list */
135 /* get a free entry */
136 bp = Safe_alloc ( sizeof (bucket));
138 bp->sym = sym; /* update the symbol pointer */
139 bp->level = level; /* update the nest level */
141 strcpy (bp->name, sname); /* copy the name into place */
143 /* if this is the first entry */
146 bp->prev = bp->next = (void *) NULL; /* point to nothing */
149 /* not first entry then add @ head of list */
159 /*-----------------------------------------------------------------*/
160 /* deleteSym - deletes a symbol from the hash Table entry */
161 /*-----------------------------------------------------------------*/
163 deleteSym (bucket ** stab, void *sym, char *sname)
171 /* find the symbol */
174 if (bp->sym == sym) /* found it then break out */
175 break; /* of the loop */
179 if (!bp) /* did not find it */
181 /* if this is the first one in the chain */
185 if (stab[i]) /* if chain ! empty */
186 stab[i]->prev = (void *) NULL;
188 /* middle || end of chain */
191 if (bp->next) /* if not end of chain */
192 bp->next->prev = bp->prev;
194 bp->prev->next = bp->next;
199 /*-----------------------------------------------------------------*/
200 /* findSym - finds a symbol in a table */
201 /*-----------------------------------------------------------------*/
203 findSym (bucket ** stab, void *sym, const char *sname)
207 bp = stab[hashKey (sname)];
210 if (bp->sym == sym || strcmp (bp->name, sname) == 0)
215 return (bp ? bp->sym : (void *) NULL);
218 /*-----------------------------------------------------------------*/
219 /* findSymWithLevel - finds a symbol with a name & level */
220 /*-----------------------------------------------------------------*/
222 findSymWithLevel (bucket ** stab, symbol * sym)
226 bp = stab[hashKey (sym->name)];
229 ** do the search from the head of the list since the
230 ** elements are added at the head it is ensured that
231 ** we will find the deeper definitions before we find
232 ** the global ones. we need to check for symbols with
233 ** level <= to the level given, if levels match then block
234 ** numbers need to match as well
238 if (strcmp (bp->name, sym->name) == 0 && bp->level <= sym->level)
240 /* if this is parameter then nothing else need to be checked */
241 if (((symbol *) (bp->sym))->_isparm)
243 /* if levels match then block numbers should also match */
244 if (bp->level && bp->level == sym->level && bp->block == sym->block)
246 /* if levels don't match then we are okay */
247 if (bp->level && bp->level != sym->level && bp->block <= sym->block)
249 /* if this is a global variable then we are ok too */
257 return (void *) NULL;
260 /*-----------------------------------------------------------------*/
261 /* findSymWithBlock - finds a symbol with name in with a block */
262 /*-----------------------------------------------------------------*/
264 findSymWithBlock (bucket ** stab, symbol * sym, int block)
268 bp = stab[hashKey (sym->name)];
271 if (strcmp (bp->name, sym->name) == 0 &&
277 return (bp ? bp->sym : (void *) NULL);
280 /*------------------------------------------------------------------*/
281 /* newSymbol () - returns a new pointer to a symbol */
282 /*------------------------------------------------------------------*/
284 newSymbol (char *name, int scope)
288 sym = Safe_alloc ( sizeof (symbol));
290 strcpy (sym->name, name); /* copy the name */
291 sym->level = scope; /* set the level */
292 sym->block = currBlockno;
293 sym->lineDef = yylineno; /* set the line number */
297 /*------------------------------------------------------------------*/
298 /* newLink - creates a new link (declarator,specifier) */
299 /*------------------------------------------------------------------*/
305 p = Safe_alloc ( sizeof (sym_link));
310 /*------------------------------------------------------------------*/
311 /* newStruct - creats a new structdef from the free list */
312 /*------------------------------------------------------------------*/
314 newStruct (char *tag)
318 s = Safe_alloc ( sizeof (structdef));
320 strcpy (s->tag, tag); /* copy the tag */
324 /*------------------------------------------------------------------*/
325 /* pointerTypes - do the computation for the pointer types */
326 /*------------------------------------------------------------------*/
328 pointerTypes (sym_link * ptr, sym_link * type)
333 /* find the first pointer type */
334 while (ptr && !IS_PTR (ptr))
337 /* could not find it */
338 if (!ptr || IS_SPEC (ptr))
341 if (IS_PTR(ptr) && DCL_TYPE(ptr)!=UPOINTER) {
342 pointerTypes (ptr->next, type);
346 /* change the pointer type depending on the
347 storage class of the type */
350 DCL_PTR_CONST (ptr) = SPEC_CONST (type);
351 DCL_PTR_VOLATILE (ptr) = SPEC_VOLATILE (type);
352 switch (SPEC_SCLS (type))
355 DCL_TYPE (ptr) = FPOINTER;
358 DCL_TYPE (ptr) = IPOINTER;
361 DCL_TYPE (ptr) = PPOINTER;
364 DCL_TYPE (ptr) = POINTER;
367 DCL_PTR_CONST (ptr) = port->mem.code_ro;
368 DCL_TYPE (ptr) = CPOINTER;
371 DCL_TYPE (ptr) = EEPPOINTER;
374 DCL_TYPE (ptr) = port->unqualified_pointer;
377 /* the storage class of type ends here */
380 SPEC_VOLATILE (type) = 0;
383 /* now change all the remaining unknown pointers
384 to generic pointers */
387 if (!IS_SPEC (ptr) && DCL_TYPE (ptr) == UPOINTER)
388 DCL_TYPE (ptr) = port->unqualified_pointer;
392 /* same for the type although it is highly unlikely that
393 type will have a pointer */
396 if (!IS_SPEC (type) && DCL_TYPE (type) == UPOINTER)
397 DCL_TYPE (type) = port->unqualified_pointer;
403 /*------------------------------------------------------------------*/
404 /* addDecl - adds a declarator @ the end of a chain */
405 /*------------------------------------------------------------------*/
407 addDecl (symbol * sym, int type, sym_link * p)
413 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
414 fprintf (stderr, "SDCCsymt.c:addDecl(%s,%d,%p)\n", sym->name, type, p);
416 /* if we are passed a link then set head & tail */
425 head = tail = newLink ();
426 DCL_TYPE (head) = type;
429 /* if this is the first entry */
437 if (IS_SPEC (sym->etype) && IS_SPEC (head) && head == tail)
439 sym->etype = mergeSpec (sym->etype, head, sym->name);
443 if (IS_SPEC (sym->etype) && !IS_SPEC (head) && head == tail)
446 while (t->next != sym->etype)
449 tail->next = sym->etype;
453 sym->etype->next = head;
459 /* if the type is an unknown pointer and has
460 a tspec then take the storage class const & volatile
461 attribute from the tspec & make it those of this
465 //DCL_TYPE (p) == UPOINTER &&
468 if (!IS_SPEC (sym->etype))
470 sym->etype = sym->etype->next = newLink ();
471 sym->etype->class = SPECIFIER;
473 SPEC_SCLS (sym->etype) = SPEC_SCLS (DCL_TSPEC (p));
474 SPEC_CONST (sym->etype) = SPEC_CONST (DCL_TSPEC (p));
475 SPEC_VOLATILE (sym->etype) = SPEC_VOLATILE (DCL_TSPEC (p));
476 DCL_TSPEC (p) = NULL;
479 // if there is a function in this type chain
480 if (p && funcInChain(sym->type)) {
481 processFuncArgs (sym);
487 /*------------------------------------------------------------------
488 checkTypeSanity: prevent the user from doing e.g.:
490 ------------------------------------------------------------------*/
491 void checkTypeSanity(sym_link *etype, char *name) {
495 if (getenv("DEBUG_SANITY")) {
496 fprintf (stderr, "sanity check skipped for %s (etype==0)\n", name);
501 if (!IS_SPEC(etype)) {
502 if (getenv("DEBUG_SANITY")) {
503 fprintf (stderr, "sanity check skipped for %s (!IS_SPEC)\n", name);
508 noun=nounName(etype);
510 if (getenv("DEBUG_SANITY")) {
511 fprintf (stderr, "checking sanity for %s %x\n", name, (int)etype);
514 if ((SPEC_NOUN(etype)==V_CHAR ||
515 SPEC_NOUN(etype)==V_FLOAT ||
516 SPEC_NOUN(etype)==V_DOUBLE ||
517 SPEC_NOUN(etype)==V_VOID) &&
518 (etype->select.s._short || SPEC_LONG(etype))) {
519 // long or short for char float double or void
520 werror (E_LONG_OR_SHORT_INVALID, noun, name);
522 if ((SPEC_NOUN(etype)==V_FLOAT ||
523 SPEC_NOUN(etype)==V_DOUBLE ||
524 SPEC_NOUN(etype)==V_VOID) &&
525 (etype->select.s._signed || SPEC_USIGN(etype))) {
526 // signed or unsigned for float double or void
527 werror (E_SIGNED_OR_UNSIGNED_INVALID, noun, name);
530 // special case for "short"
531 if (etype->select.s._short) {
532 SPEC_NOUN(etype) = options.shortis8bits ? V_CHAR : V_INT;
533 etype->select.s._short = 0;
537 "const a;" or "data b;" or "signed s" or "long l"
539 if (!SPEC_NOUN(etype)) {
540 SPEC_NOUN(etype)=V_INT;
543 if (etype->select.s._signed && SPEC_USIGN(etype)) {
544 // signed AND unsigned
545 werror (E_SIGNED_AND_UNSIGNED_INVALID, noun, name);
547 if (etype->select.s._short && SPEC_LONG(etype)) {
549 werror (E_LONG_AND_SHORT_INVALID, noun, name);
554 /*------------------------------------------------------------------*/
555 /* mergeSpec - merges two specifiers and returns the new one */
556 /*------------------------------------------------------------------*/
558 mergeSpec (sym_link * dest, sym_link * src, char *name)
560 sym_link *symlink=dest;
562 if (!IS_SPEC(dest) || !IS_SPEC(src)) {
564 werror (E_INTERNAL_ERROR, __FILE__, __LINE__, "cannot merge declarator");
567 werror (E_SYNTAX_ERROR, yytext);
568 // the show must go on
573 if (SPEC_NOUN(src)) {
574 if (!SPEC_NOUN(dest)) {
575 SPEC_NOUN(dest)=SPEC_NOUN(src);
577 /* we shouldn't redeclare the type */
578 if (getenv("DEBUG_SANITY")) {
579 fprintf (stderr, "mergeSpec: ");
581 werror(E_TWO_OR_MORE_DATA_TYPES, name);
585 if (SPEC_SCLS(src)) {
586 /* if destination has no storage class */
587 if (!SPEC_SCLS (dest) || SPEC_SCLS(dest)==S_REGISTER) {
588 SPEC_SCLS (dest) = SPEC_SCLS (src);
590 if (getenv("DEBUG_SANITY")) {
591 fprintf (stderr, "mergeSpec: ");
593 werror(E_TWO_OR_MORE_STORAGE_CLASSES, name);
597 /* copy all the specifications */
599 // we really should do:
601 if (SPEC_what(src)) {
602 if (SPEC_what(dest)) {
603 werror(W_DUPLICATE_SPEC, "what");
605 SPEC_what(dst)|=SPEC_what(src);
608 // but there are more important thing right now
610 SPEC_LONG (dest) |= SPEC_LONG (src);
611 dest->select.s._short|=src->select.s._short;
612 SPEC_USIGN (dest) |= SPEC_USIGN (src);
613 dest->select.s._signed|=src->select.s._signed;
614 SPEC_STAT (dest) |= SPEC_STAT (src);
615 SPEC_EXTR (dest) |= SPEC_EXTR (src);
616 SPEC_CONST(dest) |= SPEC_CONST (src);
617 SPEC_ABSA (dest) |= SPEC_ABSA (src);
618 SPEC_VOLATILE (dest) |= SPEC_VOLATILE (src);
619 SPEC_ADDR (dest) |= SPEC_ADDR (src);
620 SPEC_OCLS (dest) = SPEC_OCLS (src);
621 SPEC_BLEN (dest) |= SPEC_BLEN (src);
622 SPEC_BSTR (dest) |= SPEC_BSTR (src);
623 SPEC_TYPEDEF (dest) |= SPEC_TYPEDEF (src);
624 SPEC_ENUM (dest) |= SPEC_ENUM (src);
625 if (SPEC_ARGREG(src) && !SPEC_ARGREG(dest))
626 SPEC_ARGREG(dest) = SPEC_ARGREG(src);
628 if (IS_STRUCT (dest) && SPEC_STRUCT (dest) == NULL)
629 SPEC_STRUCT (dest) = SPEC_STRUCT (src);
631 /* these are the only function attributes that will be set
632 in a specifier while parsing */
633 FUNC_NONBANKED(dest) |= FUNC_NONBANKED(src);
634 FUNC_BANKED(dest) |= FUNC_BANKED(src);
635 FUNC_ISCRITICAL(dest) |= FUNC_ISCRITICAL(src);
636 FUNC_ISREENT(dest) |= FUNC_ISREENT(src);
637 FUNC_ISNAKED(dest) |= FUNC_ISNAKED(src);
638 FUNC_ISISR(dest) |= FUNC_ISISR(src);
639 FUNC_ISJAVANATIVE(dest) |= FUNC_ISJAVANATIVE(src);
640 FUNC_ISBUILTIN(dest) |= FUNC_ISBUILTIN(src);
641 FUNC_ISOVERLAY(dest) |= FUNC_ISOVERLAY(src);
642 FUNC_INTNO(dest) |= FUNC_INTNO(src);
643 FUNC_REGBANK(dest) |= FUNC_REGBANK(src);
648 /*------------------------------------------------------------------*/
649 /* cloneSpec - copies the entire spec and returns a new spec */
650 /*------------------------------------------------------------------*/
652 cloneSpec (sym_link * src)
656 /* go thru chain till we find the specifier */
657 while (src && src->class != SPECIFIER)
661 memcpy (spec, src, sizeof (sym_link));
665 /*------------------------------------------------------------------*/
666 /* genSymName - generates and returns a name used for anonymous vars */
667 /*------------------------------------------------------------------*/
669 genSymName (int level)
671 static int gCount = 0;
672 static char gname[SDCC_NAME_MAX + 1];
674 sprintf (gname, "__%04d%04d", level, gCount++);
678 /*------------------------------------------------------------------*/
679 /* getSpec - returns the specifier part from a declaration chain */
680 /*------------------------------------------------------------------*/
682 getSpec (sym_link * p)
687 while (p && !(IS_SPEC (p)))
693 /*------------------------------------------------------------------*/
694 /* newCharLink() - creates an char type */
695 /*------------------------------------------------------------------*/
702 p->class = SPECIFIER;
703 SPEC_NOUN (p) = V_CHAR;
708 /*------------------------------------------------------------------*/
709 /* newFloatLink - a new Float type */
710 /*------------------------------------------------------------------*/
717 p->class = SPECIFIER;
718 SPEC_NOUN (p) = V_FLOAT;
723 /*------------------------------------------------------------------*/
724 /* newLongLink() - new long type */
725 /*------------------------------------------------------------------*/
732 p->class = SPECIFIER;
733 SPEC_NOUN (p) = V_INT;
739 /*------------------------------------------------------------------*/
740 /* newIntLink() - creates an int type */
741 /*------------------------------------------------------------------*/
748 p->class = SPECIFIER;
749 SPEC_NOUN (p) = V_INT;
754 /*------------------------------------------------------------------*/
755 /* getSize - returns size of a type chain in bits */
756 /*------------------------------------------------------------------*/
758 getSize (sym_link * p)
760 /* if nothing return 0 */
764 { /* if this is the specifier then */
765 switch (SPEC_NOUN (p))
766 { /* depending on the specifier type */
768 return (IS_LONG (p) ? LONGSIZE : INTSIZE);
776 return SPEC_STRUCT (p)->size;
782 return ((SPEC_BLEN (p) / 8) + (SPEC_BLEN (p) % 8 ? 1 : 0));
788 /* this is a specifier */
789 switch (DCL_TYPE (p))
793 return DCL_ELEM (p) * getSize (p->next);
795 // werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
796 // "can not tell the size of an array[]");
816 /*------------------------------------------------------------------*/
817 /* bitsForType - returns # of bits required to store this type */
818 /*------------------------------------------------------------------*/
820 bitsForType (sym_link * p)
822 /* if nothing return 0 */
827 { /* if this is the specifier then */
829 switch (SPEC_NOUN (p))
830 { /* depending on the specifier type */
832 return (IS_LONG (p) ? LONGSIZE * 8 : INTSIZE * 8);
834 return FLOATSIZE * 8;
840 return SPEC_STRUCT (p)->size * 8;
846 return SPEC_BLEN (p);
852 /* this is a specifier */
853 switch (DCL_TYPE (p))
856 return DCL_ELEM (p) * getSize (p->next) * 8;
860 return (PTRSIZE * 8);
865 return (FPTRSIZE * 8);
867 return (GPTRSIZE * 8);
874 /*------------------------------------------------------------------*/
875 /* copySymbolChain - copies a symbol chain */
876 /*------------------------------------------------------------------*/
878 copySymbolChain (symbol * src)
885 dest = copySymbol (src);
886 dest->next = copySymbolChain (src->next);
890 /*------------------------------------------------------------------*/
891 /* copySymbol - makes a copy of a symbol */
892 /*------------------------------------------------------------------*/
894 copySymbol (symbol * src)
901 dest = newSymbol (src->name, src->level);
902 memcpy (dest, src, sizeof (symbol));
903 dest->level = src->level;
904 dest->block = src->block;
905 dest->ival = copyIlist (src->ival);
906 dest->type = copyLinkChain (src->type);
907 dest->etype = getSpec (dest->type);
909 dest->key = src->key;
910 dest->allocreq = src->allocreq;
914 /*------------------------------------------------------------------*/
915 /* reverseSyms - reverses the links for a symbol chain */
916 /*------------------------------------------------------------------*/
918 reverseSyms (symbol * sym)
920 symbol *prev, *curr, *next;
935 sym->next = (void *) NULL;
939 /*------------------------------------------------------------------*/
940 /* reverseLink - reverses the links for a type chain */
941 /*------------------------------------------------------------------*/
943 reverseLink (sym_link * type)
945 sym_link *prev, *curr, *next;
960 type->next = (void *) NULL;
964 /*------------------------------------------------------------------*/
965 /* addSymChain - adds a symbol chain to the symboltable */
966 /*------------------------------------------------------------------*/
968 addSymChain (symbol * symHead)
970 symbol *sym = symHead;
973 for (; sym != NULL; sym = sym->next)
976 checkTypeSanity(sym->etype, sym->name);
978 /* if already exists in the symbol table then check if
979 one of them is an extern definition if yes then
980 then check if the type match, if the types match then
981 delete the current entry and add the new entry */
982 if ((csym = findSymWithLevel (SymbolTab, sym)) &&
983 csym->level == sym->level) {
985 /* one definition extern ? */
986 if (IS_EXTERN (csym->etype) || IS_EXTERN (sym->etype)) {
987 /* do types match ? */
988 if (compareType (csym->type, sym->type) != 1) {
990 werror (E_EXTERN_MISMATCH, csym->name);
993 /* delete current entry */
994 deleteSym (SymbolTab, csym, csym->name);
998 werror (E_DUPLICATE, sym->name);
1004 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1009 /*------------------------------------------------------------------*/
1010 /* funcInChain - DCL Type 'FUNCTION' found in type chain */
1011 /*------------------------------------------------------------------*/
1013 funcInChain (sym_link * lnk)
1024 /*------------------------------------------------------------------*/
1025 /* structElemType - returns the type info of a sturct member */
1026 /*------------------------------------------------------------------*/
1028 structElemType (sym_link * stype, value * id)
1030 symbol *fields = (SPEC_STRUCT (stype) ? SPEC_STRUCT (stype)->fields : NULL);
1031 sym_link *type, *etype;
1032 sym_link *petype = getSpec (stype);
1036 /* look for the id */
1039 if (strcmp (fields->rname, id->name) == 0)
1041 type = copyLinkChain (fields->type);
1042 etype = getSpec (type);
1043 SPEC_SCLS (etype) = (SPEC_SCLS (petype) == S_REGISTER ?
1044 SPEC_SCLS (etype) : SPEC_SCLS (petype));
1047 fields = fields->next;
1051 werror (E_NOT_MEMBER, id->name);
1053 // the show must go on
1054 return newIntLink();
1057 /*------------------------------------------------------------------*/
1058 /* getStructElement - returns element of a tructure definition */
1059 /*------------------------------------------------------------------*/
1061 getStructElement (structdef * sdef, symbol * sym)
1065 for (field = sdef->fields; field; field = field->next)
1066 if (strcmp (field->name, sym->name) == 0)
1069 werror (E_NOT_MEMBER, sym->name);
1071 return sdef->fields;
1074 /*------------------------------------------------------------------*/
1075 /* compStructSize - computes the size of a structure */
1076 /*------------------------------------------------------------------*/
1078 compStructSize (int su, structdef * sdef)
1080 int sum = 0, usum = 0;
1084 /* for the identifiers */
1085 loop = sdef->fields;
1088 /* create the internal name for this variable */
1089 sprintf (loop->rname, "_%s", loop->name);
1090 loop->offset = (su == UNION ? sum = 0 : sum);
1091 SPEC_VOLATILE (loop->etype) |= (su == UNION ? 1 : 0);
1093 /* if this is a bit field */
1096 /* change it to a unsigned bit */
1097 SPEC_NOUN (loop->etype) = V_BIT;
1098 SPEC_USIGN (loop->etype) = 1;
1099 /* check if this fit into the remaining */
1100 /* bits of this byte else align it to the */
1101 /* next byte boundary */
1102 if ((SPEC_BLEN (loop->etype) = loop->bitVar) <= (8 - bitOffset)) {
1103 SPEC_BSTR (loop->etype) = bitOffset;
1104 if ((bitOffset += (loop->bitVar % 8)) == 8)
1107 else /* does not fit */ {
1109 SPEC_BSTR (loop->etype) = bitOffset;
1110 sum += (loop->bitVar / 8);
1111 bitOffset += (loop->bitVar % 8);
1113 /* if this is the last field then pad */
1114 if (!loop->next && bitOffset && bitOffset != 8) {
1120 checkDecl (loop, 1);
1121 sum += getSize (loop->type);
1126 /* if this is not a bitfield but the */
1127 /* previous one was and did not take */
1128 /* the whole byte then pad the rest */
1129 if ((loop && !loop->bitVar) && bitOffset) {
1134 /* if union then size = sizeof larget field */
1136 usum = max (usum, sum);
1140 return (su == UNION ? usum : sum);
1143 /*------------------------------------------------------------------*/
1144 /* checkSClass - check the storage class specification */
1145 /*------------------------------------------------------------------*/
1147 checkSClass (symbol * sym, int isProto)
1149 if (getenv("DEBUG_SANITY")) {
1150 fprintf (stderr, "checkSClass: %s \n", sym->name);
1153 /* type is literal can happen foe enums change
1155 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1156 SPEC_SCLS (sym->etype) = S_AUTO;
1158 /* if sfr or sbit then must also be */
1159 /* volatile the initial value will be xlated */
1160 /* to an absolute address */
1161 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1162 SPEC_SCLS (sym->etype) == S_SFR)
1164 SPEC_VOLATILE (sym->etype) = 1;
1165 /* if initial value given */
1168 SPEC_ABSA (sym->etype) = 1;
1169 SPEC_ADDR (sym->etype) =
1170 (int) list2int (sym->ival);
1175 /* if absolute address given then it mark it as
1176 volatile -- except in the PIC port */
1178 #if !OPT_DISABLE_PIC
1179 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1183 if (IS_ABSOLUTE (sym->etype))
1184 SPEC_VOLATILE (sym->etype) = 1;
1187 /* global variables declared const put into code */
1188 /* if no other storage class specified */
1189 if (sym->level == 0 &&
1190 SPEC_CONST (sym->etype) &&
1191 SPEC_SCLS(sym->etype) == S_FIXED) {
1192 SPEC_SCLS (sym->etype) = S_CODE;
1195 /* global variable in code space is a constant */
1196 if (sym->level == 0 &&
1197 SPEC_SCLS (sym->etype) == S_CODE &&
1199 SPEC_CONST (sym->etype) = 1;
1202 /* if bit variable then no storage class can be */
1203 /* specified since bit is already a storage */
1204 if (IS_BITVAR (sym->etype) &&
1205 (SPEC_SCLS (sym->etype) != S_FIXED &&
1206 SPEC_SCLS (sym->etype) != S_SBIT &&
1207 SPEC_SCLS (sym->etype) != S_BIT)
1210 werror (E_BITVAR_STORAGE, sym->name);
1211 SPEC_SCLS (sym->etype) = S_FIXED;
1214 /* extern variables cannot be initialized */
1215 if (IS_EXTERN (sym->etype) && sym->ival)
1217 werror (E_EXTERN_INIT, sym->name);
1221 /* if this is an atomatic symbol */
1222 if (sym->level && (options.stackAuto || reentrant)) {
1223 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1224 SPEC_SCLS (sym->etype) == S_FIXED ||
1225 SPEC_SCLS (sym->etype) == S_REGISTER ||
1226 SPEC_SCLS (sym->etype) == S_STACK ||
1227 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1228 SPEC_SCLS (sym->etype) = S_AUTO;
1230 /* storage class may only be specified for statics */
1231 if (!IS_STATIC(sym->etype)) {
1232 werror (E_AUTO_ASSUMED, sym->name);
1237 /* automatic symbols cannot be given */
1238 /* an absolute address ignore it */
1240 SPEC_ABSA (sym->etype) &&
1241 (options.stackAuto || reentrant))
1243 werror (E_AUTO_ABSA, sym->name);
1244 SPEC_ABSA (sym->etype) = 0;
1247 /* arrays & pointers cannot be defined for bits */
1248 /* SBITS or SFRs or BIT */
1249 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1250 (SPEC_NOUN (sym->etype) == V_BIT ||
1251 SPEC_NOUN (sym->etype) == V_SBIT ||
1252 SPEC_SCLS (sym->etype) == S_SFR))
1253 werror (E_BIT_ARRAY, sym->name);
1255 /* if this is a bit|sbit then set length & start */
1256 if (SPEC_NOUN (sym->etype) == V_BIT ||
1257 SPEC_NOUN (sym->etype) == V_SBIT)
1259 SPEC_BLEN (sym->etype) = 1;
1260 SPEC_BSTR (sym->etype) = 0;
1264 /* variables declared in CODE space must have */
1265 /* initializers if not an extern */
1266 if (SPEC_SCLS (sym->etype) == S_CODE &&
1267 sym->ival == NULL &&
1269 port->mem.code_ro &&
1270 !IS_EXTERN (sym->etype) &&
1271 !funcInChain (sym->type))
1272 werror (E_CODE_NO_INIT, sym->name);
1275 /* if parameter or local variable then change */
1276 /* the storage class to reflect where the var will go */
1277 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED &&
1278 !IS_STATIC(sym->etype))
1280 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1282 SPEC_SCLS (sym->etype) = (options.useXstack ?
1283 S_XSTACK : S_STACK);
1287 /* hack-o-matic! I see no reason why the useXstack option should ever
1288 * control this allcoation, but the code was originally that way, and
1289 * changing it for non-390 ports breaks the compiler badly.
1291 bool useXdata = TARGET_IS_DS390 ? 1 : options.useXstack;
1292 SPEC_SCLS (sym->etype) = (useXdata ?
1298 /*------------------------------------------------------------------*/
1299 /* changePointer - change pointer to functions */
1300 /*------------------------------------------------------------------*/
1302 changePointer (symbol * sym)
1306 /* go thru the chain of declarations */
1307 /* if we find a pointer to a function */
1308 /* unconditionally change it to a ptr */
1310 for (p = sym->type; p; p = p->next)
1312 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1313 DCL_TYPE (p) = port->unqualified_pointer;
1314 if (IS_PTR (p) && IS_FUNC (p->next))
1315 DCL_TYPE (p) = CPOINTER;
1319 /*------------------------------------------------------------------*/
1320 /* checkDecl - does semantic validation of a declaration */
1321 /*------------------------------------------------------------------*/
1323 checkDecl (symbol * sym, int isProto)
1326 checkSClass (sym, isProto); /* check the storage class */
1327 changePointer (sym); /* change pointers if required */
1329 /* if this is an array without any dimension
1330 then update the dimension from the initial value */
1331 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1332 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1337 /*------------------------------------------------------------------*/
1338 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1339 /*------------------------------------------------------------------*/
1341 copyLinkChain (sym_link * p)
1343 sym_link *head, *curr, *loop;
1346 head = loop = (curr ? newLink () : (void *) NULL);
1349 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1350 loop->next = (curr->next ? newLink () : (void *) NULL);
1359 /*------------------------------------------------------------------*/
1360 /* cleanUpBlock - cleansup the symbol table specified for all the */
1361 /* symbols in the given block */
1362 /*------------------------------------------------------------------*/
1364 cleanUpBlock (bucket ** table, int block)
1369 /* go thru the entire table */
1370 for (i = 0; i < 256; i++)
1372 for (chain = table[i]; chain; chain = chain->next)
1374 if (chain->block >= block)
1376 deleteSym (table, chain->sym, chain->name);
1382 /*------------------------------------------------------------------*/
1383 /* cleanUpLevel - cleansup the symbol table specified for all the */
1384 /* symbols in the given level */
1385 /*------------------------------------------------------------------*/
1387 cleanUpLevel (bucket ** table, int level)
1392 /* go thru the entire table */
1393 for (i = 0; i < 256; i++)
1395 for (chain = table[i]; chain; chain = chain->next)
1397 if (chain->level >= level)
1399 deleteSym (table, chain->sym, chain->name);
1405 /*------------------------------------------------------------------*/
1406 /* computeType - computes the resultant type from two types */
1407 /*------------------------------------------------------------------*/
1409 computeType (sym_link * type1, sym_link * type2)
1413 sym_link *etype1 = getSpec (type1);
1414 sym_link *etype2 = getSpec (type2);
1416 /* if one of them is a float then result is a float */
1417 /* here we assume that the types passed are okay */
1418 /* and can be cast to one another */
1419 /* which ever is greater in size */
1420 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1421 rType = newFloatLink ();
1423 /* if only one of them is a bit variable
1424 then the other one prevails */
1425 if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1426 rType = copyLinkChain (type2);
1427 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1428 rType = copyLinkChain (type1);
1430 /* if one of them is a pointer or array then that
1432 if (IS_PTR (type1) || IS_ARRAY (type1))
1433 rType = copyLinkChain (type1);
1434 else if (IS_PTR (type2) || IS_ARRAY (type2))
1435 rType = copyLinkChain (type2);
1436 else if (getSize (type1) > getSize (type2))
1437 rType = copyLinkChain (type1);
1439 rType = copyLinkChain (type2);
1441 reType = getSpec (rType);
1443 /* if either of them unsigned but not val then make this unsigned */
1444 if (((!IS_LITERAL(type1) && SPEC_USIGN (etype1)) ||
1445 (!IS_LITERAL(type2) && SPEC_USIGN (etype2))) &&
1447 SPEC_USIGN (reType) = 1;
1449 SPEC_USIGN (reType) = 0;
1451 /* if result is a literal then make not so */
1452 if (IS_LITERAL (reType))
1453 SPEC_SCLS (reType) = S_REGISTER;
1458 /*--------------------------------------------------------------------*/
1459 /* compareType - will do type check return 1 if match, -1 if castable */
1460 /*--------------------------------------------------------------------*/
1462 compareType (sym_link * dest, sym_link * src)
1473 /* if dest is a declarator then */
1478 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1480 //checkFunction(src,dest);
1482 return compareType (dest->next, src->next);
1484 if (IS_PTR (src) && IS_GENPTR (dest))
1486 if (IS_PTR (dest) && IS_ARRAY (src)) {
1487 value *val=aggregateToPointer (valFromType(src));
1488 int res=compareType (dest, val->type);
1489 Safe_free(val->type);
1491 //return res ? -1 : 0;
1494 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
1495 return compareType (dest->next, src);
1498 else if (IS_PTR (dest) && IS_INTEGRAL (src))
1504 /* if one is a specifier and the other is not */
1505 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
1506 (IS_SPEC (dest) && !IS_SPEC (src)))
1509 /* if one of them is a void then ok */
1510 if (SPEC_NOUN (dest) == V_VOID &&
1511 SPEC_NOUN (src) != V_VOID)
1514 if (SPEC_NOUN (dest) != V_VOID &&
1515 SPEC_NOUN (src) == V_VOID)
1518 /* if they are both bitfields then if the lengths
1519 and starts don't match */
1520 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
1521 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
1522 SPEC_BSTR (dest) != SPEC_BSTR (src)))
1525 /* it is a specifier */
1526 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
1528 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
1529 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
1530 getSize (dest) == getSize (src))
1532 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
1537 else if (IS_STRUCT (dest))
1539 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
1544 if (SPEC_LONG (dest) != SPEC_LONG (src))
1547 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
1553 /*------------------------------------------------------------------*/
1554 /* inCalleeSaveList - return 1 if found in callee save list */
1555 /*------------------------------------------------------------------*/
1557 inCalleeSaveList (char *s)
1561 if (options.all_callee_saves) return 1;
1562 for (i = 0; options.calleeSaves[i]; i++)
1563 if (strcmp (options.calleeSaves[i], s) == 0)
1569 /*-----------------------------------------------------------------*/
1570 /* aggregateToPointer: change an agggregate type function */
1571 /* argument to a pointer to that type. */
1572 /*-----------------------------------------------------------------*/
1574 aggregateToPointer (value * val)
1576 if (IS_AGGREGATE (val->type))
1578 /* if this is a structure */
1579 /* then we need to add a new link */
1580 if (IS_STRUCT (val->type))
1582 /* first lets add DECLARATOR type */
1583 sym_link *p = val->type;
1585 werror (W_STRUCT_AS_ARG, val->name);
1586 val->type = newLink ();
1587 val->type->next = p;
1590 /* change to a pointer depending on the */
1591 /* storage class specified */
1592 switch (SPEC_SCLS (val->etype))
1595 DCL_TYPE (val->type) = IPOINTER;
1598 DCL_TYPE (val->type) = PPOINTER;
1601 if (SPEC_OCLS(val->etype)) {
1602 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
1605 // this happens for (external) function parameters
1606 DCL_TYPE (val->type) = port->unqualified_pointer;
1608 if (TARGET_IS_DS390) {
1609 /* The AUTO and REGISTER classes should probably
1610 * also become generic pointers, but I haven't yet
1611 * devised a test case for that.
1613 DCL_TYPE (val->type) = port->unqualified_pointer;
1616 if (options.model==MODEL_LARGE) {
1617 DCL_TYPE (val->type) = FPOINTER;
1626 DCL_TYPE (val->type) = POINTER;
1629 DCL_TYPE (val->type) = CPOINTER;
1632 DCL_TYPE (val->type) = FPOINTER;
1635 DCL_TYPE (val->type) = EEPPOINTER;
1638 DCL_TYPE (val->type) = port->unqualified_pointer;
1641 /* is there is a symbol associated then */
1642 /* change the type of the symbol as well */
1645 val->sym->type = copyLinkChain (val->type);
1646 val->sym->etype = getSpec (val->sym->type);
1651 /*------------------------------------------------------------------*/
1652 /* checkFunction - does all kinds of check on a function */
1653 /*------------------------------------------------------------------*/
1655 checkFunction (symbol * sym, symbol *csym)
1657 value *exargs, *acargs;
1661 if (getenv("DEBUG_SANITY")) {
1662 fprintf (stderr, "checkFunction: %s ", sym->name);
1665 /* make sure the type is complete and sane */
1666 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
1668 /* if not type then some kind of error */
1672 /* if the function has no type then make it return int */
1673 if (!sym->type->next)
1674 sym->type->next = sym->etype = newIntLink ();
1676 /* function cannot return aggregate */
1677 if (IS_AGGREGATE (sym->type->next))
1679 werror (E_FUNC_AGGR, sym->name);
1683 /* function cannot return bit */
1684 if (IS_BITVAR (sym->type->next))
1686 werror (E_FUNC_BIT, sym->name);
1690 /* check if this function is defined as calleeSaves
1691 then mark it as such */
1692 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
1694 /* if interrupt service routine */
1695 /* then it cannot have arguments */
1696 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
1698 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
1699 werror (E_INT_ARGS, sym->name);
1700 FUNC_ARGS(sym->type)=NULL;
1704 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
1706 acargs=acargs->next, argCnt++) {
1708 // this can happen for reentrant functions
1709 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
1710 // the show must go on: synthesize a name and symbol
1711 sprintf (acargs->name, "_%s_PARM_%d", sym->name, argCnt);
1712 acargs->sym = newSymbol (acargs->name, 1);
1713 SPEC_OCLS (acargs->etype) = istack;
1714 acargs->sym->type = copyLinkChain (acargs->type);
1715 acargs->sym->etype = getSpec (acargs->sym->type);
1716 acargs->sym->_isparm = 1;
1717 strcpy (acargs->sym->rname, acargs->name);
1718 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
1720 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
1724 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
1725 return 1; /* not defined nothing more to check */
1727 /* check if body already present */
1728 if (csym && IFFUNC_HASBODY(csym->type))
1730 werror (E_FUNC_BODY, sym->name);
1734 /* check the return value type */
1735 if (compareType (csym->type, sym->type) <= 0)
1737 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
1738 printFromToType(csym->type, sym->type);
1742 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
1744 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
1747 if (FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type))
1749 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
1752 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
1754 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
1757 /* compare expected args with actual args */
1758 exargs = FUNC_ARGS(csym->type);
1759 acargs = FUNC_ARGS(sym->type);
1761 /* for all the expected args do */
1764 exargs = exargs->next, acargs = acargs->next, argCnt++)
1766 if (getenv("DEBUG_SANITY")) {
1767 fprintf (stderr, "checkFunction: %s ", exargs->name);
1769 /* make sure the type is complete and sane */
1770 checkTypeSanity(exargs->etype, exargs->name);
1772 /* If the actual argument is an array, any prototype
1773 * will have modified it to a pointer. Duplicate that
1776 if (IS_AGGREGATE (acargs->type))
1778 checkValue = copyValue (acargs);
1779 aggregateToPointer (checkValue);
1783 checkValue = acargs;
1786 if (compareType (exargs->type, checkValue->type) <= 0)
1788 werror (E_ARG_TYPE, argCnt);
1789 printFromToType(exargs->type, checkValue->type);
1794 /* if one them ended we have a problem */
1795 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
1796 (!exargs && acargs && !IS_VOID (acargs->type)))
1797 werror (E_ARG_COUNT);
1799 /* replace with this defition */
1800 sym->cdef = csym->cdef;
1801 deleteSym (SymbolTab, csym, csym->name);
1802 deleteFromSeg(csym);
1803 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1804 if (IS_EXTERN (csym->etype) && !
1805 IS_EXTERN (sym->etype))
1807 addSet (&publics, sym);
1812 /*-----------------------------------------------------------------*/
1813 /* processFuncArgs - does some processing with function args */
1814 /*-----------------------------------------------------------------*/
1816 processFuncArgs (symbol * func)
1820 sym_link *funcType=func->type;
1822 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
1823 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
1825 // if this is a pointer to a function
1826 if (IS_PTR(funcType)) {
1827 funcType=funcType->next;
1830 /* if this function has variable argument list */
1831 /* then make the function a reentrant one */
1832 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
1833 FUNC_ISREENT(funcType)=1;
1835 /* check if this function is defined as calleeSaves
1836 then mark it as such */
1837 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
1839 /* loop thru all the arguments */
1840 val = FUNC_ARGS(funcType);
1842 /* if it is void then remove parameters */
1843 if (val && IS_VOID (val->type))
1845 FUNC_ARGS(funcType) = NULL;
1849 /* reset regparm for the port */
1850 (*port->reset_regparms) ();
1851 /* if any of the arguments is an aggregate */
1852 /* change it to pointer to the same type */
1856 /* mark it as a register parameter if
1857 the function does not have VA_ARG
1858 and as port dictates */
1859 if (!IFFUNC_HASVARARGS(funcType) &&
1860 (argreg = (*port->reg_parm) (val->type)))
1862 SPEC_REGPARM (val->etype) = 1;
1863 SPEC_ARGREG(val->etype) = argreg;
1864 } else if (IFFUNC_ISREENT(funcType)) {
1865 FUNC_HASSTACKPARM(funcType) = 1;
1868 if (IS_AGGREGATE (val->type))
1870 aggregateToPointer (val);
1877 /* if this is an internal generated function call */
1879 /* ignore --stack-auto for this one, we don't know how it is compiled */
1880 /* simply trust on --int-long-reent or --float-reent */
1881 if (IFFUNC_ISREENT(funcType)) {
1885 /* if this function is reentrant or */
1886 /* automatics r 2b stacked then nothing */
1887 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
1891 val = FUNC_ARGS(funcType);
1896 /* if a symbolname is not given */
1897 /* synthesize a variable name */
1900 sprintf (val->name, "_%s_PARM_%d", func->name, pNum++);
1901 val->sym = newSymbol (val->name, 1);
1902 SPEC_OCLS (val->etype) = port->mem.default_local_map;
1903 val->sym->type = copyLinkChain (val->type);
1904 val->sym->etype = getSpec (val->sym->type);
1905 val->sym->_isparm = 1;
1906 strcpy (val->sym->rname, val->name);
1907 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
1908 SPEC_STAT (func->etype);
1909 addSymChain (val->sym);
1912 else /* symbol name given create synth name */
1915 sprintf (val->name, "_%s_PARM_%d", func->name, pNum++);
1916 strcpy (val->sym->rname, val->name);
1917 val->sym->_isparm = 1;
1918 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
1919 (options.model != MODEL_SMALL ? xdata : data);
1920 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
1921 SPEC_STAT (func->etype);
1927 /*-----------------------------------------------------------------*/
1928 /* isSymbolEqual - compares two symbols return 1 if they match */
1929 /*-----------------------------------------------------------------*/
1931 isSymbolEqual (symbol * dest, symbol * src)
1933 /* if pointers match then equal */
1937 /* if one of them is null then don't match */
1941 /* if both of them have rname match on rname */
1942 if (dest->rname[0] && src->rname[0])
1943 return (!strcmp (dest->rname, src->rname));
1945 /* otherwise match on name */
1946 return (!strcmp (dest->name, src->name));
1949 void PT(sym_link *type)
1951 printTypeChain(type,0);
1953 /*-----------------------------------------------------------------*/
1954 /* printTypeChain - prints the type chain in human readable form */
1955 /*-----------------------------------------------------------------*/
1957 printTypeChain (sym_link * start, FILE * of)
1960 sym_link * type, * search;
1969 fprintf (of, "void");
1973 /* print the chain as it is written in the source: */
1974 /* start with the last entry */
1975 for (type = start; type && type->next; type = type->next)
1981 if (DCL_PTR_VOLATILE (type)) {
1982 fprintf (of, "volatile ");
1984 switch (DCL_TYPE (type))
1987 fprintf (of, "function %s %s",
1988 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
1989 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
1992 if (DCL_PTR_CONST (type))
1993 fprintf (of, "const ");
1994 fprintf (of, "generic * ");
1997 if (DCL_PTR_CONST (type))
1998 fprintf (of, "const ");
1999 fprintf (of, "code * ");
2002 if (DCL_PTR_CONST (type))
2003 fprintf (of, "const ");
2004 fprintf (of, "xdata * ");
2007 if (DCL_PTR_CONST (type))
2008 fprintf (of, "const ");
2009 fprintf (of, "eeprom * ");
2013 if (DCL_PTR_CONST (type))
2014 fprintf (of, "const ");
2015 fprintf (of, "near *");
2018 if (DCL_PTR_CONST (type))
2019 fprintf (of, "const ");
2020 fprintf (of, "idata * ");
2023 if (DCL_PTR_CONST (type))
2024 fprintf (of, "const ");
2025 fprintf (of, "pdata * ");
2028 if (DCL_PTR_CONST (type))
2029 fprintf (of, "const ");
2030 fprintf (of, "unkown * ");
2033 if (DCL_ELEM(type)) {
2034 fprintf (of, "[%d] ", DCL_ELEM(type));
2036 fprintf (of, "[] ");
2043 switch (SPEC_SCLS(type))
2045 case S_DATA: fprintf (of, "data "); break;
2046 case S_XDATA: fprintf (of, "xdata "); break;
2047 case S_SFR: fprintf (of, "sfr "); break;
2048 case S_SBIT: fprintf (of, "sbit "); break;
2049 case S_CODE: fprintf (of, "code "); break;
2050 case S_IDATA: fprintf (of, "idata "); break;
2051 case S_PDATA: fprintf (of, "pdata "); break;
2052 case S_LITERAL: fprintf (of, "literal "); break;
2053 case S_STACK: fprintf (of, "stack "); break;
2054 case S_XSTACK: fprintf (of, "xstack "); break;
2055 case S_BIT: fprintf (of, "bit "); break;
2056 case S_EEPROM: fprintf (of, "eeprom "); break;
2060 if (SPEC_VOLATILE (type))
2061 fprintf (of, "volatile ");
2062 if (SPEC_USIGN (type))
2063 fprintf (of, "unsigned ");
2064 if (SPEC_CONST (type))
2065 fprintf (of, "const ");
2066 switch (SPEC_NOUN (type))
2070 fprintf (of, "long ");
2071 fprintf (of, "int");
2075 fprintf (of, "char");
2079 fprintf (of, "void");
2083 fprintf (of, "float");
2087 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2091 fprintf (of, "sbit");
2095 fprintf (of, "bit {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2099 fprintf (of, "double");
2103 fprintf (of, "unknown type");
2107 /* search entry in list before "type" */
2108 for (search = start; search && search->next != type;)
2109 search = search->next;
2118 /*-----------------------------------------------------------------*/
2119 /* cdbTypeInfo - print the type information for debugger */
2120 /*-----------------------------------------------------------------*/
2122 cdbTypeInfo (sym_link * type, FILE * of)
2124 fprintf (of, "{%d}", getSize (type));
2129 switch (DCL_TYPE (type))
2132 fprintf (of, "DF,");
2135 fprintf (of, "DG,");
2138 fprintf (of, "DC,");
2141 fprintf (of, "DX,");
2144 fprintf (of, "DD,");
2147 fprintf (of, "DI,");
2150 fprintf (of, "DP,");
2153 fprintf (of, "DA,");
2156 fprintf (of, "DA%d,", DCL_ELEM (type));
2164 switch (SPEC_NOUN (type))
2186 fprintf (of, "ST%s", SPEC_STRUCT (type)->tag);
2194 fprintf (of, "SB%d$%d", SPEC_BSTR (type), SPEC_BLEN (type));
2201 if (SPEC_USIGN (type))
2209 /*-----------------------------------------------------------------*/
2210 /* cdbSymbol - prints a symbol & its type information for debugger */
2211 /*-----------------------------------------------------------------*/
2213 cdbSymbol (symbol * sym, FILE * of, int isStructSym, int isFunc)
2225 fprintf (of, "S:"); /* symbol record */
2226 /* if this is not a structure symbol then
2227 we need to figure out the scope information */
2233 if (IS_STATIC (sym->etype))
2234 fprintf (of, "F%s$", moduleName); /* scope is file */
2236 fprintf (of, "G$"); /* scope is global */
2239 /* symbol is local */
2240 fprintf (of, "L%s$", (sym->localof ? sym->localof->name : "-null-"));
2243 fprintf (of, "S$"); /* scope is structure */
2245 /* print the name, & mangled name */
2246 fprintf (of, "%s$%d$%d(", sym->name,
2247 sym->level, sym->block);
2249 cdbTypeInfo (sym->type, of);
2252 /* print the address space */
2253 map = SPEC_OCLS (sym->etype);
2254 fprintf (of, "%c,%d,%d",
2255 (map ? map->dbName : 'Z'), sym->onStack, SPEC_STAK (sym->etype));
2257 /* if assigned to registers then output register names */
2258 /* if this is a function then print
2259 if is it an interrupt routine & interrupt number
2260 and the register bank it is using */
2262 fprintf (of, ",%d,%d,%d", FUNC_ISISR (sym->type),
2263 FUNC_INTNO (sym->type), FUNC_REGBANK (sym->type));
2264 /* alternate location to find this symbol @ : eg registers
2271 /*-----------------------------------------------------------------*/
2272 /* cdbStruct - print a structure for debugger */
2273 /*-----------------------------------------------------------------*/
2275 cdbStruct (structdef * sdef, int block, FILE * of,
2276 int inStruct, char *tag)
2281 /* if block # then must have function scope */
2282 fprintf (of, "F%s$", moduleName);
2283 fprintf (of, "%s[", (tag ? tag : sdef->tag));
2284 for (sym = sdef->fields; sym; sym = sym->next)
2286 fprintf (of, "({%d}", sym->offset);
2287 cdbSymbol (sym, of, TRUE, FALSE);
2295 /*------------------------------------------------------------------*/
2296 /* cdbStructBlock - calls struct printing for a blcks */
2297 /*------------------------------------------------------------------*/
2299 cdbStructBlock (int block, FILE * of)
2302 bucket **table = StructTab;
2306 /* go thru the entire table */
2307 for (i = 0; i < 256; i++)
2309 for (chain = table[i]; chain; chain = chain->next)
2311 if (chain->block >= block)
2313 cdbStruct ((structdef *) chain->sym, chain->block, of, 0, NULL);
2319 /*-----------------------------------------------------------------*/
2320 /* powof2 - returns power of two for the number if number is pow 2 */
2321 /*-----------------------------------------------------------------*/
2323 powof2 (unsigned long num)
2336 if (n1s > 1 || nshifts == 0)
2352 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2353 symbol *__muldiv[3][3][2];
2354 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
2355 sym_link *__multypes[3][2];
2356 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
2357 symbol *__conv[2][3][2];
2358 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2359 symbol *__rlrr[2][3][2];
2361 sym_link *floatType;
2364 _mangleFunctionName(char *in)
2366 if (port->getMangledFunctionName)
2368 return port->getMangledFunctionName(in);
2376 /*-----------------------------------------------------------------*/
2377 /* typeFromStr - create a typechain from an encoded string */
2378 /* basic types - 'c' - char */
2384 /* '*' - pointer - default (GPOINTER) */
2385 /* modifiers - 'u' - unsigned */
2386 /* pointer modifiers - 'g' - generic */
2390 /* 'F' - function */
2391 /* examples : "ig*" - generic int * */
2392 /* "cx*" - char xdata * */
2393 /* "ui" - unsigned int */
2394 /*-----------------------------------------------------------------*/
2395 sym_link *typeFromStr (char *s)
2397 sym_link *r = newLink();
2409 r->class = SPECIFIER;
2410 SPEC_NOUN(r) = V_CHAR;
2414 r->class = SPECIFIER;
2415 SPEC_NOUN(r) = V_INT;
2418 r->class = SPECIFIER;
2419 SPEC_NOUN(r) = V_INT;
2423 r->class = SPECIFIER;
2424 SPEC_NOUN(r) = V_FLOAT;
2427 r->class = SPECIFIER;
2428 SPEC_NOUN(r) = V_VOID;
2431 DCL_TYPE(r) = port->unqualified_pointer;
2438 assert(*(s+1)=='*');
2442 r->class = DECLARATOR ;
2445 DCL_TYPE(r) = GPOINTER;
2448 DCL_TYPE(r) = FPOINTER;
2451 DCL_TYPE(r) = CPOINTER;
2454 DCL_TYPE(r) = POINTER;
2457 DCL_TYPE(r) = FUNCTION;
2461 r->class = DECLARATOR ;
2462 DCL_TYPE(r) = CPOINTER;
2468 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
2469 "typeFromStr: unknown type");
2472 if (IS_SPEC(r) && usign) {
2481 /*-----------------------------------------------------------------*/
2482 /* initCSupport - create functions for C support routines */
2483 /*-----------------------------------------------------------------*/
2487 const char *smuldivmod[] =
2491 const char *sbwd[] =
2493 "char", "int", "long"
2499 const char *srlrr[] =
2504 int bwd, su, muldivmod, tofrom, rlrr;
2506 if (getenv("SDCC_NO_C_SUPPORT")) {
2507 /* for debugging only */
2511 floatType = newFloatLink ();
2513 for (bwd = 0; bwd < 3; bwd++)
2530 __multypes[bwd][0] = l;
2531 __multypes[bwd][1] = copyLinkChain (l);
2532 SPEC_USIGN (__multypes[bwd][1]) = 1;
2535 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
2536 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
2537 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
2538 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
2539 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
2540 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
2541 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
2542 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
2543 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
2544 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
2546 for (tofrom = 0; tofrom < 2; tofrom++)
2548 for (bwd = 0; bwd < 3; bwd++)
2550 for (su = 0; su < 2; su++)
2554 sprintf (buffer, "__fs2%s%s", ssu[su], sbwd[bwd]);
2555 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
2559 sprintf (buffer, "__%s%s2fs", ssu[su], sbwd[bwd]);
2560 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
2566 for (muldivmod = 0; muldivmod < 3; muldivmod++)
2568 for (bwd = 0; bwd < 3; bwd++)
2570 for (su = 0; su < 2; su++)
2572 sprintf (buffer, "_%s%s%s",
2573 smuldivmod[muldivmod],
2576 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2577 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
2582 for (rlrr = 0; rlrr < 2; rlrr++)
2584 for (bwd = 0; bwd < 3; bwd++)
2586 for (su = 0; su < 2; su++)
2588 sprintf (buffer, "_%s%s%s",
2592 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
2593 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
2599 /*-----------------------------------------------------------------*/
2600 /* initBuiltIns - create prototypes for builtin functions */
2601 /*-----------------------------------------------------------------*/
2607 if (!port->builtintable) return ;
2609 for (i = 0 ; port->builtintable[i].name ; i++) {
2610 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
2611 port->builtintable[i].nParms,port->builtintable[i].parm_types);
2612 FUNC_ISBUILTIN(sym->type) = 1;
2613 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */