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);
28 void printTypeChainRaw (sym_link * start, FILE * of);
30 void printFromToType(sym_link *from, sym_link *to) {
31 fprintf (stderr, "from type '");
32 printTypeChain (from, stderr);
33 fprintf (stderr, "'\nto type '");
34 printTypeChain (to, stderr);
35 fprintf (stderr, "'\n");
39 char *nounName(sym_link *sl) {
40 switch (SPEC_NOUN(sl))
43 if (SPEC_LONG(sl)) return "long";
44 if (sl->select.s._short) return "short";
47 case V_FLOAT: return "float";
48 case V_CHAR: return "char";
49 case V_VOID: return "void";
50 case V_STRUCT: return "struct";
51 case V_LABEL: return "label";
52 case V_BITFIELD: return "bitfield";
53 case V_BIT: return "bit";
54 case V_SBIT: return "sbit";
55 case V_DOUBLE: return "double";
60 bucket *SymbolTab[256]; /* the symbol table */
61 bucket *StructTab[256]; /* the structure table */
62 bucket *TypedefTab[256]; /* the typedef table */
63 bucket *LabelTab[256]; /* the Label table */
64 bucket *enumTab[256]; /* enumerated table */
66 /*------------------------------------------------------------------*/
67 /* initSymt () - initialises symbol table related stuff */
68 /*------------------------------------------------------------------*/
74 for (i = 0; i < 256; i++)
75 SymbolTab[i] = StructTab[i] = (void *) NULL;
79 /*-----------------------------------------------------------------*/
80 /* newBucket - allocates & returns a new bucket */
81 /*-----------------------------------------------------------------*/
87 bp = Safe_alloc ( sizeof (bucket));
92 /*-----------------------------------------------------------------*/
93 /* hashKey - computes the hashkey given a symbol name */
94 /*-----------------------------------------------------------------*/
96 hashKey (const char *s)
98 unsigned long key = 0;
105 /*-----------------------------------------------------------------*/
106 /* addSym - adds a symbol to the hash Table */
107 /*-----------------------------------------------------------------*/
109 addSym (bucket ** stab,
116 int i; /* index into the hash Table */
117 bucket *bp; /* temp bucket * */
120 symbol *csym = (symbol *)sym;
122 if (getenv("DEBUG_SANITY")) {
123 fprintf (stderr, "addSym: %s ", sname);
125 /* make sure the type is complete and sane */
126 checkTypeSanity(csym->etype, csym->name);
129 /* prevent overflow of the (r)name buffers */
130 if (strlen(sname)>SDCC_SYMNAME_MAX) {
131 werror (W_SYMBOL_NAME_TOO_LONG, SDCC_SYMNAME_MAX);
132 sname[SDCC_SYMNAME_MAX]='\0';
135 /* the symbols are always added at the head of the list */
137 /* get a free entry */
138 bp = Safe_alloc ( sizeof (bucket));
140 bp->sym = sym; /* update the symbol pointer */
141 bp->level = level; /* update the nest level */
143 strncpyz (bp->name, sname, sizeof(bp->name)); /* copy the name into place */
145 /* if this is the first entry */
148 bp->prev = bp->next = (void *) NULL; /* point to nothing */
151 /* not first entry then add @ head of list */
161 /*-----------------------------------------------------------------*/
162 /* deleteSym - deletes a symbol from the hash Table entry */
163 /*-----------------------------------------------------------------*/
165 deleteSym (bucket ** stab, void *sym, char *sname)
173 /* find the symbol */
176 if (bp->sym == sym) /* found it then break out */
177 break; /* of the loop */
181 if (!bp) /* did not find it */
183 /* if this is the first one in the chain */
187 if (stab[i]) /* if chain ! empty */
188 stab[i]->prev = (void *) NULL;
190 /* middle || end of chain */
193 if (bp->next) /* if not end of chain */
194 bp->next->prev = bp->prev;
196 bp->prev->next = bp->next;
201 /*-----------------------------------------------------------------*/
202 /* findSym - finds a symbol in a table */
203 /*-----------------------------------------------------------------*/
205 findSym (bucket ** stab, void *sym, const char *sname)
209 bp = stab[hashKey (sname)];
212 if (bp->sym == sym || strcmp (bp->name, sname) == 0)
217 return (bp ? bp->sym : (void *) NULL);
220 /*-----------------------------------------------------------------*/
221 /* findSymWithLevel - finds a symbol with a name & level */
222 /*-----------------------------------------------------------------*/
224 findSymWithLevel (bucket ** stab, symbol * sym)
228 bp = stab[hashKey (sym->name)];
231 ** do the search from the head of the list since the
232 ** elements are added at the head it is ensured that
233 ** we will find the deeper definitions before we find
234 ** the global ones. we need to check for symbols with
235 ** level <= to the level given, if levels match then block
236 ** numbers need to match as well
240 if (strcmp (bp->name, sym->name) == 0 && bp->level <= sym->level)
242 /* if this is parameter then nothing else need to be checked */
243 if (((symbol *) (bp->sym))->_isparm)
245 /* if levels match then block numbers should also match */
246 if (bp->level && bp->level == sym->level && bp->block == sym->block)
248 /* if levels don't match then we are okay */
249 if (bp->level && bp->level != sym->level && bp->block <= sym->block)
251 /* if this is a global variable then we are ok too */
259 return (void *) NULL;
262 /*-----------------------------------------------------------------*/
263 /* findSymWithBlock - finds a symbol with name in with a block */
264 /*-----------------------------------------------------------------*/
266 findSymWithBlock (bucket ** stab, symbol * sym, int block)
270 bp = stab[hashKey (sym->name)];
273 if (strcmp (bp->name, sym->name) == 0 &&
279 return (bp ? bp->sym : (void *) NULL);
282 /*------------------------------------------------------------------*/
283 /* newSymbol () - returns a new pointer to a symbol */
284 /*------------------------------------------------------------------*/
286 newSymbol (char *name, int scope)
290 sym = Safe_alloc ( sizeof (symbol));
292 strncpyz (sym->name, name, sizeof(sym->name)); /* copy the name */
293 sym->level = scope; /* set the level */
294 sym->block = currBlockno;
295 sym->lineDef = mylineno; /* set the line number */
299 /*------------------------------------------------------------------*/
300 /* newLink - creates a new link (declarator,specifier) */
301 /*------------------------------------------------------------------*/
303 newLink (SYM_LINK_CLASS select)
307 p = Safe_alloc ( sizeof (sym_link));
313 /*------------------------------------------------------------------*/
314 /* newStruct - creats a new structdef from the free list */
315 /*------------------------------------------------------------------*/
317 newStruct (char *tag)
321 s = Safe_alloc ( sizeof (structdef));
323 strncpyz (s->tag, tag, sizeof(s->tag)); /* copy the tag */
327 /*------------------------------------------------------------------*/
328 /* sclsFromPtr - Return the storage class a pointer points into. */
329 /* S_FIXED is returned for generic pointers or other */
330 /* unexpected cases */
331 /*------------------------------------------------------------------*/
333 sclsFromPtr(sym_link *ptr)
335 switch (DCL_TYPE (ptr))
358 /*------------------------------------------------------------------*/
359 /* pointerTypes - do the computation for the pointer types */
360 /*------------------------------------------------------------------*/
362 pointerTypes (sym_link * ptr, sym_link * type)
367 /* find the first pointer type */
368 while (ptr && !IS_PTR (ptr))
371 /* could not find it */
372 if (!ptr || IS_SPEC (ptr))
375 if (IS_PTR(ptr) && DCL_TYPE(ptr)!=UPOINTER) {
376 pointerTypes (ptr->next, type);
380 /* change the pointer type depending on the
381 storage class of the type */
384 switch (SPEC_SCLS (type))
387 DCL_TYPE (ptr) = FPOINTER;
390 DCL_TYPE (ptr) = IPOINTER;
393 DCL_TYPE (ptr) = PPOINTER;
396 DCL_TYPE (ptr) = POINTER;
399 DCL_TYPE (ptr) = CPOINTER;
402 DCL_TYPE (ptr) = EEPPOINTER;
405 DCL_TYPE (ptr) = port->unqualified_pointer;
408 /* the storage class of type ends here */
409 SPEC_SCLS (type) = 0;
412 /* now change all the remaining unknown pointers
413 to generic pointers */
416 if (!IS_SPEC (ptr) && DCL_TYPE (ptr) == UPOINTER)
417 DCL_TYPE (ptr) = port->unqualified_pointer;
421 /* same for the type although it is highly unlikely that
422 type will have a pointer */
425 if (!IS_SPEC (type) && DCL_TYPE (type) == UPOINTER)
426 DCL_TYPE (type) = port->unqualified_pointer;
431 /*------------------------------------------------------------------*/
432 /* addDecl - adds a declarator @ the end of a chain */
433 /*------------------------------------------------------------------*/
435 addDecl (symbol * sym, int type, sym_link * p)
441 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
442 fprintf (stderr, "SDCCsymt.c:addDecl(%s,%d,%p)\n", sym->name, type, p);
444 /* if we are passed a link then set head & tail */
453 head = tail = newLink (DECLARATOR);
454 DCL_TYPE (head) = type;
457 /* if this is the first entry */
465 if (IS_SPEC (sym->etype) && IS_SPEC (head) && head == tail)
467 sym->etype = mergeSpec (sym->etype, head, sym->name);
471 if (IS_SPEC (sym->etype) && !IS_SPEC (head) && head == tail)
474 while (t->next != sym->etype)
477 tail->next = sym->etype;
481 sym->etype->next = head;
487 /* if the type is an unknown pointer and has
488 a tspec then take the storage class const & volatile
489 attribute from the tspec & make it those of this
493 //DCL_TYPE (p) == UPOINTER &&
496 if (!IS_SPEC (sym->etype))
498 sym->etype = sym->etype->next = newLink (SPECIFIER);
500 SPEC_SCLS (sym->etype) = SPEC_SCLS (DCL_TSPEC (p));
501 DCL_TSPEC (p) = NULL;
504 // if there is a function in this type chain
505 if (p && funcInChain(sym->type)) {
506 processFuncArgs (sym);
512 /*------------------------------------------------------------------
513 checkTypeSanity: prevent the user from doing e.g.:
515 ------------------------------------------------------------------*/
516 void checkTypeSanity(sym_link *etype, char *name) {
520 if (getenv("DEBUG_SANITY")) {
521 fprintf (stderr, "sanity check skipped for %s (etype==0)\n", name);
526 if (!IS_SPEC(etype)) {
527 if (getenv("DEBUG_SANITY")) {
528 fprintf (stderr, "sanity check skipped for %s (!IS_SPEC)\n", name);
533 noun=nounName(etype);
535 if (getenv("DEBUG_SANITY")) {
536 fprintf (stderr, "checking sanity for %s %p\n", name, etype);
539 if ((SPEC_NOUN(etype)==V_CHAR ||
540 SPEC_NOUN(etype)==V_FLOAT ||
541 SPEC_NOUN(etype)==V_DOUBLE ||
542 SPEC_NOUN(etype)==V_VOID) &&
543 (etype->select.s._short || SPEC_LONG(etype))) {
544 // long or short for char float double or void
545 werror (E_LONG_OR_SHORT_INVALID, noun, name);
547 if ((SPEC_NOUN(etype)==V_FLOAT ||
548 SPEC_NOUN(etype)==V_DOUBLE ||
549 SPEC_NOUN(etype)==V_VOID) &&
550 (etype->select.s._signed || SPEC_USIGN(etype))) {
551 // signed or unsigned for float double or void
552 werror (E_SIGNED_OR_UNSIGNED_INVALID, noun, name);
555 // special case for "short"
556 if (etype->select.s._short) {
557 SPEC_NOUN(etype) = options.shortis8bits ? V_CHAR : V_INT;
558 etype->select.s._short = 0;
562 "const a;" or "data b;" or "signed s" or "long l"
564 if (!SPEC_NOUN(etype)) {
565 SPEC_NOUN(etype)=V_INT;
568 if (etype->select.s._signed && SPEC_USIGN(etype)) {
569 // signed AND unsigned
570 werror (E_SIGNED_AND_UNSIGNED_INVALID, noun, name);
572 if (etype->select.s._short && SPEC_LONG(etype)) {
574 werror (E_LONG_AND_SHORT_INVALID, noun, name);
579 /*------------------------------------------------------------------*/
580 /* mergeSpec - merges two specifiers and returns the new one */
581 /*------------------------------------------------------------------*/
583 mergeSpec (sym_link * dest, sym_link * src, char *name)
585 if (!IS_SPEC(dest) || !IS_SPEC(src)) {
587 werror (E_INTERNAL_ERROR, __FILE__, __LINE__, "cannot merge declarator");
590 werror (E_SYNTAX_ERROR, yytext);
591 // the show must go on
596 if (SPEC_NOUN(src)) {
597 if (!SPEC_NOUN(dest)) {
598 SPEC_NOUN(dest)=SPEC_NOUN(src);
600 /* we shouldn't redeclare the type */
601 if (getenv("DEBUG_SANITY")) {
602 fprintf (stderr, "mergeSpec: ");
604 werror(E_TWO_OR_MORE_DATA_TYPES, name);
608 if (SPEC_SCLS(src)) {
609 /* if destination has no storage class */
610 if (!SPEC_SCLS (dest) || SPEC_SCLS(dest)==S_REGISTER) {
611 SPEC_SCLS (dest) = SPEC_SCLS (src);
613 if (getenv("DEBUG_SANITY")) {
614 fprintf (stderr, "mergeSpec: ");
616 werror(E_TWO_OR_MORE_STORAGE_CLASSES, name);
620 /* copy all the specifications */
622 // we really should do:
624 if (SPEC_what(src)) {
625 if (SPEC_what(dest)) {
626 werror(W_DUPLICATE_SPEC, "what");
628 SPEC_what(dst)|=SPEC_what(src);
631 // but there are more important thing right now
633 SPEC_LONG (dest) |= SPEC_LONG (src);
634 dest->select.s._short|=src->select.s._short;
635 SPEC_USIGN (dest) |= SPEC_USIGN (src);
636 dest->select.s._signed|=src->select.s._signed;
637 SPEC_STAT (dest) |= SPEC_STAT (src);
638 SPEC_EXTR (dest) |= SPEC_EXTR (src);
639 SPEC_CONST(dest) |= SPEC_CONST (src);
640 SPEC_ABSA (dest) |= SPEC_ABSA (src);
641 SPEC_VOLATILE (dest) |= SPEC_VOLATILE (src);
642 SPEC_ADDR (dest) |= SPEC_ADDR (src);
643 SPEC_OCLS (dest) = SPEC_OCLS (src);
644 SPEC_BLEN (dest) |= SPEC_BLEN (src);
645 SPEC_BSTR (dest) |= SPEC_BSTR (src);
646 SPEC_TYPEDEF (dest) |= SPEC_TYPEDEF (src);
647 SPEC_ENUM (dest) |= SPEC_ENUM (src);
648 if (SPEC_ARGREG(src) && !SPEC_ARGREG(dest))
649 SPEC_ARGREG(dest) = SPEC_ARGREG(src);
651 if (IS_STRUCT (dest) && SPEC_STRUCT (dest) == NULL)
652 SPEC_STRUCT (dest) = SPEC_STRUCT (src);
654 /* these are the only function attributes that will be set
655 in a specifier while parsing */
656 FUNC_NONBANKED(dest) |= FUNC_NONBANKED(src);
657 FUNC_BANKED(dest) |= FUNC_BANKED(src);
658 FUNC_ISCRITICAL(dest) |= FUNC_ISCRITICAL(src);
659 FUNC_ISREENT(dest) |= FUNC_ISREENT(src);
660 FUNC_ISNAKED(dest) |= FUNC_ISNAKED(src);
661 FUNC_ISISR(dest) |= FUNC_ISISR(src);
662 FUNC_ISJAVANATIVE(dest) |= FUNC_ISJAVANATIVE(src);
663 FUNC_ISBUILTIN(dest) |= FUNC_ISBUILTIN(src);
664 FUNC_ISOVERLAY(dest) |= FUNC_ISOVERLAY(src);
665 FUNC_INTNO(dest) |= FUNC_INTNO(src);
666 FUNC_REGBANK(dest) |= FUNC_REGBANK(src);
671 /*------------------------------------------------------------------*/
672 /* genSymName - generates and returns a name used for anonymous vars */
673 /*------------------------------------------------------------------*/
675 genSymName (int level)
677 static int gCount = 0;
678 static char gname[SDCC_NAME_MAX + 1];
680 SNPRINTF (gname, sizeof(gname), "__%04d%04d", level, gCount++);
684 /*------------------------------------------------------------------*/
685 /* getSpec - returns the specifier part from a declaration chain */
686 /*------------------------------------------------------------------*/
688 getSpec (sym_link * p)
693 while (p && !(IS_SPEC (p)))
699 /*------------------------------------------------------------------*/
700 /* newCharLink() - creates an char type */
701 /*------------------------------------------------------------------*/
707 p = newLink (SPECIFIER);
708 SPEC_NOUN (p) = V_CHAR;
713 /*------------------------------------------------------------------*/
714 /* newFloatLink - a new Float type */
715 /*------------------------------------------------------------------*/
721 p = newLink (SPECIFIER);
722 SPEC_NOUN (p) = V_FLOAT;
727 /*------------------------------------------------------------------*/
728 /* newLongLink() - new long type */
729 /*------------------------------------------------------------------*/
735 p = newLink (SPECIFIER);
736 SPEC_NOUN (p) = V_INT;
742 /*------------------------------------------------------------------*/
743 /* newIntLink() - creates an int type */
744 /*------------------------------------------------------------------*/
750 p = newLink (SPECIFIER);
751 SPEC_NOUN (p) = V_INT;
756 /*------------------------------------------------------------------*/
757 /* getSize - returns size of a type chain in bits */
758 /*------------------------------------------------------------------*/
760 getSize (sym_link * p)
762 /* if nothing return 0 */
766 { /* if this is the specifier then */
767 switch (SPEC_NOUN (p))
768 { /* depending on the specifier type */
770 return (IS_LONG (p) ? LONGSIZE : INTSIZE);
778 return SPEC_STRUCT (p)->size;
785 return ((SPEC_BLEN (p) / 8) + (SPEC_BLEN (p) % 8 ? 1 : 0));
791 /* this is a specifier */
792 switch (DCL_TYPE (p))
796 return DCL_ELEM (p) * getSize (p->next);
798 // werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
799 // "can not tell the size of an array[]");
819 /*------------------------------------------------------------------*/
820 /* bitsForType - returns # of bits required to store this type */
821 /*------------------------------------------------------------------*/
823 bitsForType (sym_link * p)
825 /* if nothing return 0 */
830 { /* if this is the specifier then */
832 switch (SPEC_NOUN (p))
833 { /* depending on the specifier type */
835 return (IS_LONG (p) ? LONGSIZE * 8 : INTSIZE * 8);
837 return FLOATSIZE * 8;
843 return SPEC_STRUCT (p)->size * 8;
850 return SPEC_BLEN (p);
856 /* this is a specifier */
857 switch (DCL_TYPE (p))
860 return DCL_ELEM (p) * getSize (p->next) * 8;
864 return (PTRSIZE * 8);
869 return (FPTRSIZE * 8);
871 return (GPTRSIZE * 8);
878 /*------------------------------------------------------------------*/
879 /* copySymbolChain - copies a symbol chain */
880 /*------------------------------------------------------------------*/
882 copySymbolChain (symbol * src)
889 dest = copySymbol (src);
890 dest->next = copySymbolChain (src->next);
894 /*------------------------------------------------------------------*/
895 /* copySymbol - makes a copy of a symbol */
896 /*------------------------------------------------------------------*/
898 copySymbol (symbol * src)
905 dest = newSymbol (src->name, src->level);
906 memcpy (dest, src, sizeof (symbol));
907 dest->level = src->level;
908 dest->block = src->block;
909 dest->ival = copyIlist (src->ival);
910 dest->type = copyLinkChain (src->type);
911 dest->etype = getSpec (dest->type);
913 dest->key = src->key;
914 dest->allocreq = src->allocreq;
918 /*------------------------------------------------------------------*/
919 /* reverseSyms - reverses the links for a symbol chain */
920 /*------------------------------------------------------------------*/
922 reverseSyms (symbol * sym)
924 symbol *prev, *curr, *next;
939 sym->next = (void *) NULL;
943 /*------------------------------------------------------------------*/
944 /* reverseLink - reverses the links for a type chain */
945 /*------------------------------------------------------------------*/
947 reverseLink (sym_link * type)
949 sym_link *prev, *curr, *next;
964 type->next = (void *) NULL;
968 /*------------------------------------------------------------------*/
969 /* addSymChain - adds a symbol chain to the symboltable */
970 /*------------------------------------------------------------------*/
972 addSymChain (symbol * symHead)
974 symbol *sym = symHead;
977 for (; sym != NULL; sym = sym->next)
980 checkTypeSanity(sym->etype, sym->name);
982 /* if already exists in the symbol table then check if
983 one of them is an extern definition if yes then
984 then check if the type match, if the types match then
985 delete the current entry and add the new entry */
986 if ((csym = findSymWithLevel (SymbolTab, sym)) &&
987 csym->level == sym->level) {
989 /* one definition extern ? */
990 if (IS_EXTERN (csym->etype) || IS_EXTERN (sym->etype)) {
991 /* do types match ? */
992 //checkDecl (sym, IS_EXTERN (sym->etype));
993 if (compareTypeExact (csym->type, sym->type, sym->level) != 1) {
995 werror (E_EXTERN_MISMATCH, csym->name);
996 printFromToType (csym->type, sym->type);
1001 //checkDecl (sym, 0);
1002 if (compareTypeExact (csym->type, sym->type, sym->level) != 1) {
1003 werror (E_DUPLICATE, sym->name);
1004 printFromToType (csym->type, sym->type);
1008 /* delete current entry */
1009 deleteSym (SymbolTab, csym, csym->name);
1010 deleteFromSeg(csym);
1014 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1019 /*------------------------------------------------------------------*/
1020 /* funcInChain - DCL Type 'FUNCTION' found in type chain */
1021 /*------------------------------------------------------------------*/
1023 funcInChain (sym_link * lnk)
1034 /*------------------------------------------------------------------*/
1035 /* structElemType - returns the type info of a struct member */
1036 /*------------------------------------------------------------------*/
1038 structElemType (sym_link * stype, value * id)
1040 symbol *fields = (SPEC_STRUCT (stype) ? SPEC_STRUCT (stype)->fields : NULL);
1041 sym_link *type, *etype;
1042 sym_link *petype = getSpec (stype);
1046 /* look for the id */
1049 if (strcmp (fields->rname, id->name) == 0)
1051 type = copyLinkChain (fields->type);
1052 etype = getSpec (type);
1053 SPEC_SCLS (etype) = (SPEC_SCLS (petype) == S_REGISTER ?
1054 SPEC_SCLS (etype) : SPEC_SCLS (petype));
1056 SPEC_CONST (type) |= SPEC_CONST (stype);
1058 DCL_PTR_CONST (type) |= SPEC_CONST (stype);
1061 fields = fields->next;
1065 werror (E_NOT_MEMBER, id->name);
1067 // the show must go on
1068 return newIntLink();
1071 /*------------------------------------------------------------------*/
1072 /* getStructElement - returns element of a tructure definition */
1073 /*------------------------------------------------------------------*/
1075 getStructElement (structdef * sdef, symbol * sym)
1079 for (field = sdef->fields; field; field = field->next)
1080 if (strcmp (field->name, sym->name) == 0)
1083 werror (E_NOT_MEMBER, sym->name);
1085 return sdef->fields;
1088 /*------------------------------------------------------------------*/
1089 /* compStructSize - computes the size of a structure */
1090 /*------------------------------------------------------------------*/
1092 compStructSize (int su, structdef * sdef)
1094 int sum = 0, usum = 0;
1098 /* for the identifiers */
1099 loop = sdef->fields;
1102 /* create the internal name for this variable */
1103 SNPRINTF (loop->rname, sizeof(loop->rname), "_%s", loop->name);
1108 SPEC_VOLATILE (loop->etype) |= (su == UNION ? 1 : 0);
1110 /* if this is a bit field */
1113 /* change it to a unsigned bit */
1114 SPEC_NOUN (loop->etype) = V_BITFIELD;
1115 SPEC_USIGN (loop->etype) = 1;
1116 SPEC_BLEN (loop->etype) = loop->bitVar;
1118 if (loop->bitVar == BITVAR_PAD) {
1119 /* A zero length bitfield forces padding */
1120 SPEC_BSTR (loop->etype) = bitOffset;
1121 SPEC_BLEN (loop->etype) = 0;
1126 if (bitOffset == 8) {
1130 /* check if this fit into the remaining */
1131 /* bits of this byte else align it to the */
1132 /* next byte boundary */
1133 if (loop->bitVar <= (8 - bitOffset)) {
1134 /* fits into current byte */
1136 SPEC_BSTR (loop->etype) = bitOffset;
1137 bitOffset += loop->bitVar;
1139 else if (!bitOffset) {
1140 /* does not fit, but is already byte aligned */
1142 SPEC_BSTR (loop->etype) = bitOffset;
1143 bitOffset += loop->bitVar;
1146 /* does not fit; need to realign first */
1148 loop->offset = (su == UNION ? sum = 0 : sum);
1150 SPEC_BSTR (loop->etype) = bitOffset;
1151 bitOffset += loop->bitVar;
1153 while (bitOffset>8) {
1160 /* This is a non-bit field. Make sure we are */
1161 /* byte aligned first */
1164 loop->offset = (su == UNION ? sum = 0 : sum);
1168 checkDecl (loop, 1);
1169 sum += getSize (loop->type);
1174 /* if union then size = sizeof larget field */
1176 /* For UNION, round up after each field */
1177 sum += ((bitOffset+7)/8);
1178 usum = max (usum, sum);
1183 /* For STRUCT, round up after all fields processed */
1185 sum += ((bitOffset+7)/8);
1187 return (su == UNION ? usum : sum);
1190 /*------------------------------------------------------------------*/
1191 /* checkSClass - check the storage class specification */
1192 /*------------------------------------------------------------------*/
1194 checkSClass (symbol * sym, int isProto)
1198 if (getenv("DEBUG_SANITY")) {
1199 fprintf (stderr, "checkSClass: %s \n", sym->name);
1202 /* type is literal can happen for enums change
1204 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1205 SPEC_SCLS (sym->etype) = S_AUTO;
1207 /* if sfr or sbit then must also be volatile */
1208 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1209 SPEC_SCLS (sym->etype) == S_SFR)
1211 SPEC_VOLATILE (sym->etype) = 1;
1214 /* if absolute address given then it mark it as
1215 volatile -- except in the PIC port */
1217 #if !OPT_DISABLE_PIC || !OPT_DISABLE_PIC16
1218 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1219 if (!TARGET_IS_PIC && !TARGET_IS_PIC16)
1222 if (IS_ABSOLUTE (sym->etype))
1223 SPEC_VOLATILE (sym->etype) = 1;
1225 /* If code memory is read only, then pointers to code memory */
1226 /* implicitly point to constants -- make this explicit */
1228 while (t && t->next) {
1229 if (IS_CODEPTR(t) && port->mem.code_ro) {
1230 if (IS_SPEC(t->next)) {
1231 SPEC_CONST (t->next) = 1;
1233 DCL_PTR_CONST (t->next) = 1;
1239 /* global variables declared const put into code */
1240 /* if no other storage class specified */
1241 if (sym->level == 0 &&
1242 SPEC_SCLS(sym->etype) == S_FIXED &&
1243 !IS_FUNC(sym->type)) {
1244 /* find the first non-array link */
1248 if (IS_CONSTANT (t)) {
1249 SPEC_SCLS (sym->etype) = S_CODE;
1253 /* global variable in code space is a constant */
1254 if (sym->level == 0 &&
1255 SPEC_SCLS (sym->etype) == S_CODE &&
1256 port->mem.code_ro) {
1257 /* find the first non-array link */
1264 DCL_PTR_CONST (t) = 1;
1268 /* if bit variable then no storage class can be */
1269 /* specified since bit is already a storage */
1270 if (IS_BITVAR (sym->etype) &&
1271 (SPEC_SCLS (sym->etype) != S_FIXED &&
1272 SPEC_SCLS (sym->etype) != S_SBIT &&
1273 SPEC_SCLS (sym->etype) != S_BIT)
1276 werror (E_BITVAR_STORAGE, sym->name);
1277 SPEC_SCLS (sym->etype) = S_FIXED;
1280 /* extern variables cannot be initialized */
1281 if (IS_EXTERN (sym->etype) && sym->ival)
1283 werror (E_EXTERN_INIT, sym->name);
1287 /* if this is an automatic symbol */
1288 if (sym->level && (options.stackAuto || reentrant)) {
1289 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1290 SPEC_SCLS (sym->etype) == S_FIXED ||
1291 SPEC_SCLS (sym->etype) == S_REGISTER ||
1292 SPEC_SCLS (sym->etype) == S_STACK ||
1293 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1294 SPEC_SCLS (sym->etype) = S_AUTO;
1296 /* storage class may only be specified for statics */
1297 if (!IS_STATIC(sym->etype)) {
1298 werror (E_AUTO_ASSUMED, sym->name);
1303 /* automatic symbols cannot be given */
1304 /* an absolute address ignore it */
1306 SPEC_ABSA (sym->etype) &&
1307 (options.stackAuto || reentrant))
1309 werror (E_AUTO_ABSA, sym->name);
1310 SPEC_ABSA (sym->etype) = 0;
1313 /* arrays & pointers cannot be defined for bits */
1314 /* SBITS or SFRs or BIT */
1315 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1316 (SPEC_NOUN (sym->etype) == V_BIT ||
1317 SPEC_NOUN (sym->etype) == V_SBIT ||
1318 SPEC_NOUN (sym->etype) == V_BITFIELD ||
1319 SPEC_SCLS (sym->etype) == S_SFR))
1320 werror (E_BIT_ARRAY, sym->name);
1322 /* if this is a bit|sbit then set length & start */
1323 if (SPEC_NOUN (sym->etype) == V_BIT ||
1324 SPEC_NOUN (sym->etype) == V_SBIT)
1326 SPEC_BLEN (sym->etype) = 1;
1327 SPEC_BSTR (sym->etype) = 0;
1331 /* variables declared in CODE space must have */
1332 /* initializers if not an extern */
1333 if (SPEC_SCLS (sym->etype) == S_CODE &&
1334 sym->ival == NULL &&
1336 port->mem.code_ro &&
1337 !IS_EXTERN (sym->etype) &&
1338 !funcInChain (sym->type))
1339 werror (E_CODE_NO_INIT, sym->name);
1342 /* if parameter or local variable then change */
1343 /* the storage class to reflect where the var will go */
1344 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED &&
1345 !IS_STATIC(sym->etype))
1347 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1349 SPEC_SCLS (sym->etype) = (options.useXstack ?
1350 S_XSTACK : S_STACK);
1354 /* hack-o-matic! I see no reason why the useXstack option should ever
1355 * control this allcoation, but the code was originally that way, and
1356 * changing it for non-390 ports breaks the compiler badly.
1358 bool useXdata = (TARGET_IS_DS390 || TARGET_IS_DS400) ?
1359 1 : options.useXstack;
1360 SPEC_SCLS (sym->etype) = (useXdata ?
1366 /*------------------------------------------------------------------*/
1367 /* changePointer - change pointer to functions */
1368 /*------------------------------------------------------------------*/
1370 changePointer (symbol * sym)
1374 /* go thru the chain of declarations */
1375 /* if we find a pointer to a function */
1376 /* unconditionally change it to a ptr */
1378 for (p = sym->type; p; p = p->next)
1380 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1381 DCL_TYPE (p) = port->unqualified_pointer;
1382 if (IS_PTR (p) && IS_FUNC (p->next))
1383 DCL_TYPE (p) = CPOINTER;
1387 /*------------------------------------------------------------------*/
1388 /* checkDecl - does semantic validation of a declaration */
1389 /*------------------------------------------------------------------*/
1391 checkDecl (symbol * sym, int isProto)
1394 checkSClass (sym, isProto); /* check the storage class */
1395 changePointer (sym); /* change pointers if required */
1397 /* if this is an array without any dimension
1398 then update the dimension from the initial value */
1399 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1400 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1405 /*------------------------------------------------------------------*/
1406 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1407 /*------------------------------------------------------------------*/
1409 copyLinkChain (sym_link * p)
1411 sym_link *head, *curr, *loop;
1414 head = loop = (curr ? newLink (p->class) : (void *) NULL);
1417 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1418 loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
1427 /*------------------------------------------------------------------*/
1428 /* cleanUpBlock - cleansup the symbol table specified for all the */
1429 /* symbols in the given block */
1430 /*------------------------------------------------------------------*/
1432 cleanUpBlock (bucket ** table, int block)
1437 /* go thru the entire table */
1438 for (i = 0; i < 256; i++)
1440 for (chain = table[i]; chain; chain = chain->next)
1442 if (chain->block >= block)
1444 deleteSym (table, chain->sym, chain->name);
1450 /*------------------------------------------------------------------*/
1451 /* cleanUpLevel - cleansup the symbol table specified for all the */
1452 /* symbols in the given level */
1453 /*------------------------------------------------------------------*/
1455 cleanUpLevel (bucket ** table, int level)
1460 /* go thru the entire table */
1461 for (i = 0; i < 256; i++)
1463 for (chain = table[i]; chain; chain = chain->next)
1465 if (chain->level >= level)
1467 deleteSym (table, chain->sym, chain->name);
1473 /*------------------------------------------------------------------*/
1474 /* computeType - computes the resultant type from two types */
1475 /*------------------------------------------------------------------*/
1477 computeType (sym_link * type1, sym_link * type2)
1481 sym_link *etype1 = getSpec (type1);
1482 sym_link *etype2 = getSpec (type2);
1484 /* if one of them is a float then result is a float */
1485 /* here we assume that the types passed are okay */
1486 /* and can be cast to one another */
1487 /* which ever is greater in size */
1488 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1489 rType = newFloatLink ();
1491 /* if only one of them is a bit variable
1492 then the other one prevails */
1493 if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1494 rType = copyLinkChain (type2);
1495 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1496 rType = copyLinkChain (type1);
1498 /* if one of them is a pointer or array then that
1500 if (IS_PTR (type1) || IS_ARRAY (type1))
1501 rType = copyLinkChain (type1);
1502 else if (IS_PTR (type2) || IS_ARRAY (type2))
1503 rType = copyLinkChain (type2);
1504 else if (getSize (type1) > getSize (type2))
1505 rType = copyLinkChain (type1);
1507 rType = copyLinkChain (type2);
1509 reType = getSpec (rType);
1511 if (SPEC_NOUN (reType) == V_CHAR)
1512 SPEC_NOUN (reType) = V_INT;
1515 /* if either of them unsigned but not val then make this unsigned */
1516 if ((SPEC_USIGN (etype1) || SPEC_USIGN (etype2)) &&
1518 SPEC_USIGN (reType) = 1;
1520 SPEC_USIGN (reType) = 0;
1522 /* if result is a literal then make not so */
1523 if (IS_LITERAL (reType))
1524 SPEC_SCLS (reType) = S_REGISTER;
1529 /*--------------------------------------------------------------------*/
1530 /* compareType - will do type check return 1 if match, -1 if castable */
1531 /*--------------------------------------------------------------------*/
1533 compareType (sym_link * dest, sym_link * src)
1544 /* if dest is a declarator then */
1549 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1551 //checkFunction(src,dest);
1553 return compareType (dest->next, src->next);
1555 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
1558 if (IS_PTR (src) && IS_GENPTR (dest))
1560 if (IS_PTR (dest) && IS_ARRAY (src)) {
1561 value *val=aggregateToPointer (valFromType(src));
1562 int res=compareType (dest, val->type);
1563 Safe_free(val->type);
1567 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
1568 return compareType (dest->next, src);
1571 else if (IS_PTR (dest) && IS_INTEGRAL (src))
1577 /* if one is a specifier and the other is not */
1578 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
1579 (IS_SPEC (dest) && !IS_SPEC (src)))
1582 /* if one of them is a void then ok */
1583 if (SPEC_NOUN (dest) == V_VOID &&
1584 SPEC_NOUN (src) != V_VOID)
1587 if (SPEC_NOUN (dest) != V_VOID &&
1588 SPEC_NOUN (src) == V_VOID)
1591 /* if they are both bitfields then if the lengths
1592 and starts don't match */
1593 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
1594 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
1595 SPEC_BSTR (dest) != SPEC_BSTR (src)))
1598 /* it is a specifier */
1599 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
1601 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
1602 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
1603 getSize (dest) == getSize (src))
1605 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
1610 else if (IS_STRUCT (dest))
1612 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
1617 if (SPEC_LONG (dest) != SPEC_LONG (src))
1620 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
1626 /*--------------------------------------------------------------------*/
1627 /* compareTypeExact - will do type check return 1 if match exactly */
1628 /*--------------------------------------------------------------------*/
1630 compareTypeExact (sym_link * dest, sym_link * src, int level)
1632 STORAGE_CLASS srcScls, destScls;
1643 /* if dest is a declarator then */
1648 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1649 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
1651 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
1653 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
1656 return compareTypeExact (dest->next, src->next, -1);
1657 return compareTypeExact (dest->next, src->next, level);
1664 /* if one is a specifier and the other is not */
1665 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
1666 (IS_SPEC (dest) && !IS_SPEC (src)))
1669 /* if one of them is a void then ok */
1670 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
1673 /* if they are both bitfields then if the lengths
1674 and starts don't match */
1675 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
1676 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
1677 SPEC_BSTR (dest) != SPEC_BSTR (src)))
1680 if (IS_INTEGRAL (dest))
1682 /* signedness must match */
1683 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
1685 /* size must match */
1686 if (SPEC_LONG (dest) != SPEC_LONG (src))
1688 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
1692 if (IS_STRUCT (dest))
1694 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
1698 if (SPEC_CONST (dest) != SPEC_CONST (src))
1700 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
1702 if (SPEC_STAT (dest) != SPEC_STAT (src))
1705 destScls = SPEC_SCLS (dest);
1706 srcScls = SPEC_SCLS (src);
1708 /* Compensate for const to const code change in checkSClass() */
1709 if (!level & port->mem.code_ro && SPEC_CONST (dest))
1711 if (srcScls == S_CODE && destScls == S_FIXED)
1713 if (destScls == S_CODE && srcScls == S_FIXED)
1717 /* compensate for allocGlobal() */
1718 if ((srcScls == S_FIXED || srcScls == S_AUTO)
1719 && port->mem.default_globl_map == xdata
1723 if (level>0 && !SPEC_STAT (dest))
1725 /* Compensate for hack-o-matic in checkSClass() */
1726 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1728 if (destScls == S_FIXED)
1729 destScls = (options.useXstack ? S_XSTACK : S_STACK);
1730 if (srcScls == S_FIXED)
1731 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
1733 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
1735 if (destScls == S_FIXED)
1737 if (srcScls == S_FIXED)
1743 if (srcScls != destScls)
1745 printf ("level = %d\n", level);
1746 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
1747 SPEC_SCLS (src), SPEC_SCLS (dest));
1748 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
1756 /*------------------------------------------------------------------*/
1757 /* inCalleeSaveList - return 1 if found in callee save list */
1758 /*------------------------------------------------------------------*/
1760 calleeCmp(void *p1, void *p2)
1762 return (strcmp((char *)p1, (char *)(p2)) == 0);
1766 inCalleeSaveList(char *s)
1768 if (options.all_callee_saves)
1770 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
1773 /*-----------------------------------------------------------------*/
1774 /* aggregateToPointer: change an agggregate type function */
1775 /* argument to a pointer to that type. */
1776 /*-----------------------------------------------------------------*/
1778 aggregateToPointer (value * val)
1780 if (IS_AGGREGATE (val->type))
1782 /* if this is a structure */
1783 /* then we need to add a new link */
1784 if (IS_STRUCT (val->type))
1786 /* first lets add DECLARATOR type */
1787 sym_link *p = val->type;
1789 werror (W_STRUCT_AS_ARG, val->name);
1790 val->type = newLink (DECLARATOR);
1791 val->type->next = p;
1794 /* change to a pointer depending on the */
1795 /* storage class specified */
1796 switch (SPEC_SCLS (val->etype))
1799 DCL_TYPE (val->type) = IPOINTER;
1802 DCL_TYPE (val->type) = PPOINTER;
1805 if (SPEC_OCLS(val->etype)) {
1806 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
1808 // this happens for (external) function parameters
1809 DCL_TYPE (val->type) = port->unqualified_pointer;
1815 DCL_TYPE (val->type) = POINTER;
1818 DCL_TYPE (val->type) = CPOINTER;
1821 DCL_TYPE (val->type) = FPOINTER;
1824 DCL_TYPE (val->type) = EEPPOINTER;
1827 DCL_TYPE (val->type) = port->unqualified_pointer;
1830 /* is there is a symbol associated then */
1831 /* change the type of the symbol as well */
1834 val->sym->type = copyLinkChain (val->type);
1835 val->sym->etype = getSpec (val->sym->type);
1840 /*------------------------------------------------------------------*/
1841 /* checkFunction - does all kinds of check on a function */
1842 /*------------------------------------------------------------------*/
1844 checkFunction (symbol * sym, symbol *csym)
1846 value *exargs, *acargs;
1850 if (getenv("DEBUG_SANITY")) {
1851 fprintf (stderr, "checkFunction: %s ", sym->name);
1854 /* make sure the type is complete and sane */
1855 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
1857 /* if not type then some kind of error */
1861 /* if the function has no type then make it return int */
1862 if (!sym->type->next)
1863 sym->type->next = sym->etype = newIntLink ();
1865 /* function cannot return aggregate */
1866 if (IS_AGGREGATE (sym->type->next))
1868 werror (E_FUNC_AGGR, sym->name);
1872 /* function cannot return bit */
1873 if (IS_BITVAR (sym->type->next))
1875 werror (E_FUNC_BIT, sym->name);
1879 /* check if this function is defined as calleeSaves
1880 then mark it as such */
1881 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
1883 /* if interrupt service routine */
1884 /* then it cannot have arguments */
1885 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
1887 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
1888 werror (E_INT_ARGS, sym->name);
1889 FUNC_ARGS(sym->type)=NULL;
1893 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
1895 acargs=acargs->next, argCnt++) {
1897 // this can happen for reentrant functions
1898 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
1899 // the show must go on: synthesize a name and symbol
1900 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
1901 acargs->sym = newSymbol (acargs->name, 1);
1902 SPEC_OCLS (acargs->etype) = istack;
1903 acargs->sym->type = copyLinkChain (acargs->type);
1904 acargs->sym->etype = getSpec (acargs->sym->type);
1905 acargs->sym->_isparm = 1;
1906 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
1907 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
1909 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
1914 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
1915 return 1; /* not defined nothing more to check */
1917 /* check if body already present */
1918 if (csym && IFFUNC_HASBODY(csym->type))
1920 werror (E_FUNC_BODY, sym->name);
1924 /* check the return value type */
1925 if (compareType (csym->type, sym->type) <= 0)
1927 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
1928 printFromToType(csym->type, sym->type);
1932 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
1934 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
1937 if (FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type))
1939 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
1942 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
1944 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
1947 /* Really, reentrant should match regardless of argCnt, but */
1948 /* this breaks some existing code (the fp lib functions). If */
1949 /* the first argument is always passed the same way, this */
1950 /* lax checking is ok (but may not be true for in future ports) */
1951 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
1954 //printf("argCnt = %d\n",argCnt);
1955 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
1958 /* compare expected args with actual args */
1959 exargs = FUNC_ARGS(csym->type);
1960 acargs = FUNC_ARGS(sym->type);
1962 /* for all the expected args do */
1965 exargs = exargs->next, acargs = acargs->next, argCnt++)
1967 if (getenv("DEBUG_SANITY")) {
1968 fprintf (stderr, "checkFunction: %s ", exargs->name);
1970 /* make sure the type is complete and sane */
1971 checkTypeSanity(exargs->etype, exargs->name);
1973 /* If the actual argument is an array, any prototype
1974 * will have modified it to a pointer. Duplicate that
1977 if (IS_AGGREGATE (acargs->type))
1979 checkValue = copyValue (acargs);
1980 aggregateToPointer (checkValue);
1984 checkValue = acargs;
1987 if (compareType (exargs->type, checkValue->type) <= 0)
1989 werror (E_ARG_TYPE, argCnt);
1990 printFromToType(exargs->type, checkValue->type);
1995 /* if one them ended we have a problem */
1996 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
1997 (!exargs && acargs && !IS_VOID (acargs->type)))
1998 werror (E_ARG_COUNT);
2000 /* replace with this defition */
2001 sym->cdef = csym->cdef;
2002 deleteSym (SymbolTab, csym, csym->name);
2003 deleteFromSeg(csym);
2004 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2005 if (IS_EXTERN (csym->etype) && !
2006 IS_EXTERN (sym->etype))
2008 addSet (&publics, sym);
2013 /*------------------------------------------------------------------*/
2014 /* cdbStructBlock - calls struct printing for a blcks */
2015 /*------------------------------------------------------------------*/
2016 void cdbStructBlock (int block)
2019 bucket **table = StructTab;
2022 /* go thru the entire table */
2023 for (i = 0; i < 256; i++)
2025 for (chain = table[i]; chain; chain = chain->next)
2027 if (chain->block >= block)
2030 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2036 /*-----------------------------------------------------------------*/
2037 /* processFuncArgs - does some processing with function args */
2038 /*-----------------------------------------------------------------*/
2040 processFuncArgs (symbol * func)
2044 sym_link *funcType=func->type;
2046 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2047 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2049 // if this is a pointer to a function
2050 if (IS_PTR(funcType)) {
2051 funcType=funcType->next;
2054 /* if this function has variable argument list */
2055 /* then make the function a reentrant one */
2056 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2057 FUNC_ISREENT(funcType)=1;
2059 /* check if this function is defined as calleeSaves
2060 then mark it as such */
2061 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2063 /* loop thru all the arguments */
2064 val = FUNC_ARGS(funcType);
2066 /* if it is void then remove parameters */
2067 if (val && IS_VOID (val->type))
2069 FUNC_ARGS(funcType) = NULL;
2073 /* reset regparm for the port */
2074 (*port->reset_regparms) ();
2075 /* if any of the arguments is an aggregate */
2076 /* change it to pointer to the same type */
2080 /* mark it as a register parameter if
2081 the function does not have VA_ARG
2082 and as port dictates */
2083 if (!IFFUNC_HASVARARGS(funcType) &&
2084 (argreg = (*port->reg_parm) (val->type)))
2086 SPEC_REGPARM (val->etype) = 1;
2087 SPEC_ARGREG(val->etype) = argreg;
2088 } else if (IFFUNC_ISREENT(funcType)) {
2089 FUNC_HASSTACKPARM(funcType) = 1;
2092 if (IS_AGGREGATE (val->type))
2094 aggregateToPointer (val);
2101 /* if this is an internal generated function call */
2103 /* ignore --stack-auto for this one, we don't know how it is compiled */
2104 /* simply trust on --int-long-reent or --float-reent */
2105 if (IFFUNC_ISREENT(funcType)) {
2109 /* if this function is reentrant or */
2110 /* automatics r 2b stacked then nothing */
2111 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2115 val = FUNC_ARGS(funcType);
2120 /* if a symbolname is not given */
2121 /* synthesize a variable name */
2124 SNPRINTF (val->name, sizeof(val->name),
2125 "_%s_PARM_%d", func->name, pNum++);
2126 val->sym = newSymbol (val->name, 1);
2127 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2128 val->sym->type = copyLinkChain (val->type);
2129 val->sym->etype = getSpec (val->sym->type);
2130 val->sym->_isparm = 1;
2131 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2132 if (IS_SPEC(func->etype)) {
2133 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2134 SPEC_STAT (func->etype);
2136 addSymChain (val->sym);
2139 else /* symbol name given create synth name */
2142 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2143 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2144 val->sym->_isparm = 1;
2145 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2146 (options.model != MODEL_SMALL ? xdata : data);
2147 if (IS_SPEC(func->etype)) {
2148 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2149 SPEC_STAT (func->etype);
2152 if (!isinSet(operKeyReset, val->sym)) {
2153 addSet (&operKeyReset, val->sym);
2154 applyToSet (operKeyReset, resetParmKey);
2160 /*-----------------------------------------------------------------*/
2161 /* isSymbolEqual - compares two symbols return 1 if they match */
2162 /*-----------------------------------------------------------------*/
2164 isSymbolEqual (symbol * dest, symbol * src)
2166 /* if pointers match then equal */
2170 /* if one of them is null then don't match */
2174 /* if both of them have rname match on rname */
2175 if (dest->rname[0] && src->rname[0])
2176 return (!strcmp (dest->rname, src->rname));
2178 /* otherwise match on name */
2179 return (!strcmp (dest->name, src->name));
2182 void PT(sym_link *type)
2184 printTypeChain(type,0);
2186 /*-----------------------------------------------------------------*/
2187 /* printTypeChain - prints the type chain in human readable form */
2188 /*-----------------------------------------------------------------*/
2190 printTypeChain (sym_link * start, FILE * of)
2194 sym_link * type, * search;
2204 fprintf (of, "void");
2208 /* Print the chain as it is written in the source: */
2209 /* start with the last entry. */
2210 /* However, the storage class at the end of the */
2211 /* chain reall applies to the first in the chain! */
2213 for (type = start; type && type->next; type = type->next)
2216 scls=SPEC_SCLS(type);
2224 case S_DATA: fprintf (of, "data-"); break;
2225 case S_XDATA: fprintf (of, "xdata-"); break;
2226 case S_SFR: fprintf (of, "sfr-"); break;
2227 case S_SBIT: fprintf (of, "sbit-"); break;
2228 case S_CODE: fprintf (of, "code-"); break;
2229 case S_IDATA: fprintf (of, "idata-"); break;
2230 case S_PDATA: fprintf (of, "pdata-"); break;
2231 case S_LITERAL: fprintf (of, "literal-"); break;
2232 case S_STACK: fprintf (of, "stack-"); break;
2233 case S_XSTACK: fprintf (of, "xstack-"); break;
2234 case S_BIT: fprintf (of, "bit-"); break;
2235 case S_EEPROM: fprintf (of, "eeprom-"); break;
2242 if (!IS_FUNC(type)) {
2243 if (DCL_PTR_VOLATILE (type)) {
2244 fprintf (of, "volatile-");
2246 if (DCL_PTR_CONST (type)) {
2247 fprintf (of, "const-");
2250 switch (DCL_TYPE (type))
2253 fprintf (of, "function %s %s",
2254 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2255 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2257 for (args = FUNC_ARGS(type);
2260 printTypeChain(args->type, of);
2267 fprintf (of, "generic* ");
2270 fprintf (of, "code* ");
2273 fprintf (of, "xdata* ");
2276 fprintf (of, "eeprom* ");
2279 fprintf (of, "near* ");
2282 fprintf (of, "idata* ");
2285 fprintf (of, "pdata* ");
2288 fprintf (of, "unknown* ");
2291 if (DCL_ELEM(type)) {
2292 fprintf (of, "[%d] ", DCL_ELEM(type));
2294 fprintf (of, "[] ");
2301 if (SPEC_VOLATILE (type))
2302 fprintf (of, "volatile-");
2303 if (SPEC_CONST (type))
2304 fprintf (of, "const-");
2305 if (SPEC_USIGN (type))
2306 fprintf (of, "unsigned-");
2307 switch (SPEC_NOUN (type))
2311 fprintf (of, "long-");
2312 fprintf (of, "int");
2316 fprintf (of, "char");
2320 fprintf (of, "void");
2324 fprintf (of, "float");
2328 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2332 fprintf (of, "sbit");
2336 fprintf (of, "bit");
2340 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2344 fprintf (of, "double");
2348 fprintf (of, "unknown type");
2352 /* search entry in list before "type" */
2353 for (search = start; search && search->next != type;)
2354 search = search->next;
2363 /*--------------------------------------------------------------------*/
2364 /* printTypeChainRaw - prints the type chain in human readable form */
2365 /* in the raw data structure ordering */
2366 /*--------------------------------------------------------------------*/
2368 printTypeChainRaw (sym_link * start, FILE * of)
2381 fprintf (of, "void");
2391 if (!IS_FUNC(type)) {
2392 if (DCL_PTR_VOLATILE (type)) {
2393 fprintf (of, "volatile-");
2395 if (DCL_PTR_CONST (type)) {
2396 fprintf (of, "const-");
2399 switch (DCL_TYPE (type))
2402 fprintf (of, "function %s %s",
2403 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2404 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2406 for (args = FUNC_ARGS(type);
2409 printTypeChain(args->type, of);
2416 fprintf (of, "generic* ");
2419 fprintf (of, "code* ");
2422 fprintf (of, "xdata* ");
2425 fprintf (of, "eeprom* ");
2428 fprintf (of, "near* ");
2431 fprintf (of, "idata* ");
2434 fprintf (of, "pdata* ");
2437 fprintf (of, "unknown* ");
2440 if (DCL_ELEM(type)) {
2441 fprintf (of, "[%d] ", DCL_ELEM(type));
2443 fprintf (of, "[] ");
2447 if (DCL_TSPEC(type))
2450 printTypeChainRaw(DCL_TSPEC(type), of);
2454 else if (IS_SPEC (type))
2456 switch (SPEC_SCLS (type))
2458 case S_DATA: fprintf (of, "data-"); break;
2459 case S_XDATA: fprintf (of, "xdata-"); break;
2460 case S_SFR: fprintf (of, "sfr-"); break;
2461 case S_SBIT: fprintf (of, "sbit-"); break;
2462 case S_CODE: fprintf (of, "code-"); break;
2463 case S_IDATA: fprintf (of, "idata-"); break;
2464 case S_PDATA: fprintf (of, "pdata-"); break;
2465 case S_LITERAL: fprintf (of, "literal-"); break;
2466 case S_STACK: fprintf (of, "stack-"); break;
2467 case S_XSTACK: fprintf (of, "xstack-"); break;
2468 case S_BIT: fprintf (of, "bit-"); break;
2469 case S_EEPROM: fprintf (of, "eeprom-"); break;
2472 if (SPEC_VOLATILE (type))
2473 fprintf (of, "volatile-");
2474 if (SPEC_CONST (type))
2475 fprintf (of, "const-");
2476 if (SPEC_USIGN (type))
2477 fprintf (of, "unsigned-");
2478 switch (SPEC_NOUN (type))
2482 fprintf (of, "long-");
2483 fprintf (of, "int");
2487 fprintf (of, "char");
2491 fprintf (of, "void");
2495 fprintf (of, "float");
2499 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2503 fprintf (of, "sbit");
2507 fprintf (of, "bit");
2511 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2515 fprintf (of, "double");
2519 fprintf (of, "unknown type");
2524 fprintf (of, "NOT_SPEC_OR_DECL");
2534 /*-----------------------------------------------------------------*/
2535 /* powof2 - returns power of two for the number if number is pow 2 */
2536 /*-----------------------------------------------------------------*/
2538 powof2 (unsigned long num)
2551 if (n1s > 1 || nshifts == 0)
2567 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2568 symbol *__muldiv[3][3][2];
2569 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
2570 sym_link *__multypes[3][2];
2571 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
2572 symbol *__conv[2][3][2];
2573 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2574 symbol *__rlrr[2][3][2];
2576 sym_link *floatType;
2579 _mangleFunctionName(char *in)
2581 if (port->getMangledFunctionName)
2583 return port->getMangledFunctionName(in);
2591 /*-----------------------------------------------------------------*/
2592 /* typeFromStr - create a typechain from an encoded string */
2593 /* basic types - 'c' - char */
2599 /* '*' - pointer - default (GPOINTER) */
2600 /* modifiers - 'u' - unsigned */
2601 /* pointer modifiers - 'g' - generic */
2605 /* 'F' - function */
2606 /* examples : "ig*" - generic int * */
2607 /* "cx*" - char xdata * */
2608 /* "ui" - unsigned int */
2609 /*-----------------------------------------------------------------*/
2610 sym_link *typeFromStr (char *s)
2612 sym_link *r = newLink(DECLARATOR);
2624 r->class = SPECIFIER;
2625 SPEC_NOUN(r) = V_CHAR;
2629 r->class = SPECIFIER;
2630 SPEC_NOUN(r) = V_INT;
2633 r->class = SPECIFIER;
2634 SPEC_NOUN(r) = V_INT;
2638 r->class = SPECIFIER;
2639 SPEC_NOUN(r) = V_FLOAT;
2642 r->class = SPECIFIER;
2643 SPEC_NOUN(r) = V_VOID;
2646 DCL_TYPE(r) = port->unqualified_pointer;
2653 assert(*(s+1)=='*');
2654 nr = newLink(DECLARATOR);
2659 DCL_TYPE(r) = GPOINTER;
2662 DCL_TYPE(r) = FPOINTER;
2665 DCL_TYPE(r) = CPOINTER;
2668 DCL_TYPE(r) = POINTER;
2671 DCL_TYPE(r) = FUNCTION;
2672 nr = newLink(DECLARATOR);
2675 DCL_TYPE(r) = CPOINTER;
2681 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
2682 "typeFromStr: unknown type");
2685 if (IS_SPEC(r) && usign) {
2694 /*-----------------------------------------------------------------*/
2695 /* initCSupport - create functions for C support routines */
2696 /*-----------------------------------------------------------------*/
2700 const char *smuldivmod[] =
2704 const char *sbwd[] =
2706 "char", "int", "long"
2712 const char *srlrr[] =
2717 int bwd, su, muldivmod, tofrom, rlrr;
2719 if (getenv("SDCC_NO_C_SUPPORT")) {
2720 /* for debugging only */
2724 floatType = newFloatLink ();
2726 for (bwd = 0; bwd < 3; bwd++)
2743 __multypes[bwd][0] = l;
2744 __multypes[bwd][1] = copyLinkChain (l);
2745 SPEC_USIGN (__multypes[bwd][1]) = 1;
2748 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
2749 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
2750 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
2751 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
2752 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
2753 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
2754 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
2755 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
2756 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
2757 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
2759 for (tofrom = 0; tofrom < 2; tofrom++)
2761 for (bwd = 0; bwd < 3; bwd++)
2763 for (su = 0; su < 2; su++)
2767 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
2768 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
2772 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
2773 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
2780 for (muldivmod = 0; muldivmod < 3; muldivmod++)
2782 for (bwd = 0; bwd < 3; bwd++)
2784 for (su = 0; su < 2; su++)
2786 SNPRINTF (buffer, sizeof(buffer),
2788 smuldivmod[muldivmod],
2791 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2792 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
2797 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
2798 Therefore they've been merged into mulint() and mullong().
2801 for (bwd = 0; bwd < 3; bwd++)
2803 for (su = 0; su < 2; su++)
2805 for (muldivmod = 1; muldivmod < 3; muldivmod++)
2808 SNPRINTF (buffer, sizeof(buffer),
2810 smuldivmod[muldivmod],
2813 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2814 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
2822 for (su = 0; su < 2; su++)
2824 /* muluchar and mulschar are still separate functions, because e.g. the z80
2825 port is sign/zero-extending to int before calling mulint() */
2826 SNPRINTF (buffer, sizeof(buffer),
2828 smuldivmod[muldivmod],
2831 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2832 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
2836 /* word and doubleword */
2837 for (bwd = 1; bwd < 3; bwd++)
2840 SNPRINTF (buffer, sizeof(buffer),
2842 smuldivmod[muldivmod],
2844 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
2845 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
2846 /* signed = unsigned */
2847 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
2850 for (rlrr = 0; rlrr < 2; rlrr++)
2852 for (bwd = 0; bwd < 3; bwd++)
2854 for (su = 0; su < 2; su++)
2856 SNPRINTF (buffer, sizeof(buffer),
2861 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
2862 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
2868 /*-----------------------------------------------------------------*/
2869 /* initBuiltIns - create prototypes for builtin functions */
2870 /*-----------------------------------------------------------------*/
2876 if (!port->builtintable) return ;
2878 for (i = 0 ; port->builtintable[i].name ; i++) {
2879 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
2880 port->builtintable[i].nParms,port->builtintable[i].parm_types);
2881 FUNC_ISBUILTIN(sym->type) = 1;
2882 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
2886 sym_link *validateLink(sym_link *l,
2893 if (l && l->class==select)
2898 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
2899 " expected %s, got %s\n",
2900 macro, args, file, line,
2901 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
2903 return l; // never reached, makes compiler happy.