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 -------------------------------------------------------------------------*/
29 value *aggregateToPointer (value *val);
30 void printTypeChainRaw (sym_link * start, FILE * of);
32 void printFromToType(sym_link *from, sym_link *to) {
33 fprintf (stderr, "from type '");
34 printTypeChain (from, stderr);
35 fprintf (stderr, "'\nto type '");
36 printTypeChain (to, stderr);
37 fprintf (stderr, "'\n");
41 char *nounName(sym_link *sl) {
42 switch (SPEC_NOUN(sl))
45 if (SPEC_LONG(sl)) return "long";
46 if (sl->select.s._short) return "short";
49 case V_FLOAT: return "float";
50 case V_CHAR: return "char";
51 case V_VOID: return "void";
52 case V_STRUCT: return "struct";
53 case V_LABEL: return "label";
54 case V_BITFIELD: return "bitfield";
55 case V_BIT: return "bit";
56 case V_SBIT: return "sbit";
57 case V_DOUBLE: return "double";
62 bucket *SymbolTab[256]; /* the symbol table */
63 bucket *StructTab[256]; /* the structure table */
64 bucket *TypedefTab[256]; /* the typedef table */
65 bucket *LabelTab[256]; /* the Label table */
66 bucket *enumTab[256]; /* enumerated table */
68 /*------------------------------------------------------------------*/
69 /* initSymt () - initialises symbol table related stuff */
70 /*------------------------------------------------------------------*/
76 for (i = 0; i < 256; i++)
77 SymbolTab[i] = StructTab[i] = (void *) NULL;
81 /*-----------------------------------------------------------------*/
82 /* newBucket - allocates & returns a new bucket */
83 /*-----------------------------------------------------------------*/
89 bp = Safe_alloc ( sizeof (bucket));
94 /*-----------------------------------------------------------------*/
95 /* hashKey - computes the hashkey given a symbol name */
96 /*-----------------------------------------------------------------*/
98 hashKey (const char *s)
100 unsigned long key = 0;
107 /*-----------------------------------------------------------------*/
108 /* addSym - adds a symbol to the hash Table */
109 /*-----------------------------------------------------------------*/
111 addSym (bucket ** stab,
118 int i; /* index into the hash Table */
119 bucket *bp; /* temp bucket * */
122 symbol *csym = (symbol *)sym;
124 if (getenv("DEBUG_SANITY")) {
125 fprintf (stderr, "addSym: %s ", sname);
127 /* make sure the type is complete and sane */
128 checkTypeSanity(csym->etype, csym->name);
131 /* prevent overflow of the (r)name buffers */
132 if (strlen(sname)>SDCC_SYMNAME_MAX) {
133 werror (W_SYMBOL_NAME_TOO_LONG, SDCC_SYMNAME_MAX);
134 sname[SDCC_SYMNAME_MAX]='\0';
137 /* the symbols are always added at the head of the list */
139 /* get a free entry */
140 bp = Safe_alloc ( sizeof (bucket));
142 bp->sym = sym; /* update the symbol pointer */
143 bp->level = level; /* update the nest level */
145 strncpyz (bp->name, sname, sizeof(bp->name)); /* copy the name into place */
147 /* if this is the first entry */
150 bp->prev = bp->next = (void *) NULL; /* point to nothing */
153 /* not first entry then add @ head of list */
163 /*-----------------------------------------------------------------*/
164 /* deleteSym - deletes a symbol from the hash Table entry */
165 /*-----------------------------------------------------------------*/
167 deleteSym (bucket ** stab, void *sym, char *sname)
175 /* find the symbol */
178 if (bp->sym == sym) /* found it then break out */
179 break; /* of the loop */
183 if (!bp) /* did not find it */
185 /* if this is the first one in the chain */
189 if (stab[i]) /* if chain ! empty */
190 stab[i]->prev = (void *) NULL;
192 /* middle || end of chain */
195 if (bp->next) /* if not end of chain */
196 bp->next->prev = bp->prev;
198 bp->prev->next = bp->next;
203 /*-----------------------------------------------------------------*/
204 /* findSym - finds a symbol in a table */
205 /*-----------------------------------------------------------------*/
207 findSym (bucket ** stab, void *sym, const char *sname)
211 bp = stab[hashKey (sname)];
214 if (bp->sym == sym || strcmp (bp->name, sname) == 0)
219 return (bp ? bp->sym : (void *) NULL);
222 /*-----------------------------------------------------------------*/
223 /* findSymWithLevel - finds a symbol with a name & level */
224 /*-----------------------------------------------------------------*/
226 findSymWithLevel (bucket ** stab, symbol * sym)
230 bp = stab[hashKey (sym->name)];
233 ** do the search from the head of the list since the
234 ** elements are added at the head it is ensured that
235 ** we will find the deeper definitions before we find
236 ** the global ones. we need to check for symbols with
237 ** level <= to the level given, if levels match then block
238 ** numbers need to match as well
242 if (strcmp (bp->name, sym->name) == 0 && bp->level <= sym->level)
244 /* if this is parameter then nothing else need to be checked */
245 if (((symbol *) (bp->sym))->_isparm)
247 /* if levels match then block numbers should also match */
248 if (bp->level && bp->level == sym->level && bp->block == sym->block)
250 /* if levels don't match then we are okay */
251 if (bp->level && bp->level != sym->level && bp->block <= sym->block)
253 /* if this is a global variable then we are ok too */
261 return (void *) NULL;
264 /*-----------------------------------------------------------------*/
265 /* findSymWithBlock - finds a symbol with name in with a block */
266 /*-----------------------------------------------------------------*/
268 findSymWithBlock (bucket ** stab, symbol * sym, int block)
272 bp = stab[hashKey (sym->name)];
275 if (strcmp (bp->name, sym->name) == 0 &&
281 return (bp ? bp->sym : (void *) NULL);
284 /*------------------------------------------------------------------*/
285 /* newSymbol () - returns a new pointer to a symbol */
286 /*------------------------------------------------------------------*/
288 newSymbol (char *name, int scope)
292 sym = Safe_alloc ( sizeof (symbol));
294 strncpyz (sym->name, name, sizeof(sym->name)); /* copy the name */
295 sym->level = scope; /* set the level */
296 sym->block = currBlockno;
297 sym->lineDef = mylineno; /* set the line number */
298 sym->fileDef = currFname;
302 /*------------------------------------------------------------------*/
303 /* newLink - creates a new link (declarator,specifier) */
304 /*------------------------------------------------------------------*/
306 newLink (SYM_LINK_CLASS select)
310 p = Safe_alloc ( sizeof (sym_link));
316 /*------------------------------------------------------------------*/
317 /* newStruct - creats a new structdef from the free list */
318 /*------------------------------------------------------------------*/
320 newStruct (char *tag)
324 s = Safe_alloc ( sizeof (structdef));
326 strncpyz (s->tag, tag, sizeof(s->tag)); /* copy the tag */
330 /*------------------------------------------------------------------*/
331 /* sclsFromPtr - Return the storage class a pointer points into. */
332 /* S_FIXED is returned for generic pointers or other */
333 /* unexpected cases */
334 /*------------------------------------------------------------------*/
336 sclsFromPtr(sym_link *ptr)
338 switch (DCL_TYPE (ptr))
361 /*------------------------------------------------------------------*/
362 /* pointerTypes - do the computation for the pointer types */
363 /*------------------------------------------------------------------*/
365 pointerTypes (sym_link * ptr, sym_link * type)
370 /* find the first pointer type */
371 while (ptr && !IS_PTR (ptr))
374 /* could not find it */
375 if (!ptr || IS_SPEC (ptr))
378 if (IS_PTR(ptr) && DCL_TYPE(ptr)!=UPOINTER) {
379 pointerTypes (ptr->next, type);
383 /* change the pointer type depending on the
384 storage class of the type */
387 switch (SPEC_SCLS (type))
390 DCL_TYPE (ptr) = FPOINTER;
393 DCL_TYPE (ptr) = IPOINTER;
396 DCL_TYPE (ptr) = PPOINTER;
399 DCL_TYPE (ptr) = POINTER;
402 DCL_TYPE (ptr) = CPOINTER;
405 DCL_TYPE (ptr) = EEPPOINTER;
408 DCL_TYPE (ptr) = port->unqualified_pointer;
411 /* the storage class of type ends here */
412 SPEC_SCLS (type) = 0;
415 /* now change all the remaining unknown pointers
416 to generic pointers */
419 if (!IS_SPEC (ptr) && DCL_TYPE (ptr) == UPOINTER)
420 DCL_TYPE (ptr) = port->unqualified_pointer;
424 /* same for the type although it is highly unlikely that
425 type will have a pointer */
428 if (!IS_SPEC (type) && DCL_TYPE (type) == UPOINTER)
429 DCL_TYPE (type) = port->unqualified_pointer;
434 /*------------------------------------------------------------------*/
435 /* addDecl - adds a declarator @ the end of a chain */
436 /*------------------------------------------------------------------*/
438 addDecl (symbol * sym, int type, sym_link * p)
444 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
445 fprintf (stderr, "SDCCsymt.c:addDecl(%s,%d,%p)\n", sym->name, type, p);
447 /* if we are passed a link then set head & tail */
456 head = tail = newLink (DECLARATOR);
457 DCL_TYPE (head) = type;
460 /* if this is the first entry */
468 if (IS_SPEC (sym->etype) && IS_SPEC (head) && head == tail)
470 sym->etype = mergeSpec (sym->etype, head, sym->name);
474 if (IS_SPEC (sym->etype) && !IS_SPEC (head) && head == tail)
477 while (t->next != sym->etype)
480 tail->next = sym->etype;
484 sym->etype->next = head;
490 /* if the type is an unknown pointer and has
491 a tspec then take the storage class const & volatile
492 attribute from the tspec & make it those of this
496 //DCL_TYPE (p) == UPOINTER &&
499 if (!IS_SPEC (sym->etype))
501 sym->etype = sym->etype->next = newLink (SPECIFIER);
503 SPEC_SCLS (sym->etype) = SPEC_SCLS (DCL_TSPEC (p));
504 DCL_TSPEC (p) = NULL;
507 // if there is a function in this type chain
508 if (p && funcInChain(sym->type)) {
509 processFuncArgs (sym);
515 /*------------------------------------------------------------------
516 checkTypeSanity: prevent the user from doing e.g.:
518 ------------------------------------------------------------------*/
519 void checkTypeSanity(sym_link *etype, char *name) {
523 if (getenv("DEBUG_SANITY")) {
524 fprintf (stderr, "sanity check skipped for %s (etype==0)\n", name);
529 if (!IS_SPEC(etype)) {
530 if (getenv("DEBUG_SANITY")) {
531 fprintf (stderr, "sanity check skipped for %s (!IS_SPEC)\n", name);
536 noun=nounName(etype);
538 if (getenv("DEBUG_SANITY")) {
539 fprintf (stderr, "checking sanity for %s %p\n", name, etype);
542 if ((SPEC_NOUN(etype)==V_CHAR ||
543 SPEC_NOUN(etype)==V_FLOAT ||
544 SPEC_NOUN(etype)==V_DOUBLE ||
545 SPEC_NOUN(etype)==V_VOID) &&
546 (etype->select.s._short || SPEC_LONG(etype))) {
547 // long or short for char float double or void
548 werror (E_LONG_OR_SHORT_INVALID, noun, name);
550 if ((SPEC_NOUN(etype)==V_FLOAT ||
551 SPEC_NOUN(etype)==V_DOUBLE ||
552 SPEC_NOUN(etype)==V_VOID) &&
553 (etype->select.s._signed || SPEC_USIGN(etype))) {
554 // signed or unsigned for float double or void
555 werror (E_SIGNED_OR_UNSIGNED_INVALID, noun, name);
558 // special case for "short"
559 if (etype->select.s._short) {
560 SPEC_NOUN(etype) = options.shortis8bits ? V_CHAR : V_INT;
561 etype->select.s._short = 0;
565 "const a;" or "data b;" or "signed s" or "long l"
567 if (!SPEC_NOUN(etype)) {
568 SPEC_NOUN(etype)=V_INT;
571 /* ISO/IEC 9899 J.3.9 implementation defined behaviour: */
572 /* a "plain" int bitfield is unsigned */
573 if (SPEC_NOUN(etype)==V_BIT ||
574 SPEC_NOUN(etype)==V_SBIT) {
575 if (!etype->select.s._signed)
576 SPEC_USIGN(etype) = 1;
579 if (etype->select.s._signed && SPEC_USIGN(etype)) {
580 // signed AND unsigned
581 werror (E_SIGNED_AND_UNSIGNED_INVALID, noun, name);
583 if (etype->select.s._short && SPEC_LONG(etype)) {
585 werror (E_LONG_AND_SHORT_INVALID, noun, name);
590 /*------------------------------------------------------------------*/
591 /* mergeSpec - merges two specifiers and returns the new one */
592 /*------------------------------------------------------------------*/
594 mergeSpec (sym_link * dest, sym_link * src, char *name)
596 if (!IS_SPEC(dest) || !IS_SPEC(src)) {
598 werror (E_INTERNAL_ERROR, __FILE__, __LINE__, "cannot merge declarator");
601 werror (E_SYNTAX_ERROR, yytext);
602 // the show must go on
607 if (SPEC_NOUN(src)) {
608 if (!SPEC_NOUN(dest)) {
609 SPEC_NOUN(dest)=SPEC_NOUN(src);
611 /* we shouldn't redeclare the type */
612 if (getenv("DEBUG_SANITY")) {
613 fprintf (stderr, "mergeSpec: ");
615 werror(E_TWO_OR_MORE_DATA_TYPES, name);
619 if (SPEC_SCLS(src)) {
620 /* if destination has no storage class */
621 if (!SPEC_SCLS (dest) || SPEC_SCLS(dest)==S_REGISTER) {
622 SPEC_SCLS (dest) = SPEC_SCLS (src);
624 if (getenv("DEBUG_SANITY")) {
625 fprintf (stderr, "mergeSpec: ");
627 werror(E_TWO_OR_MORE_STORAGE_CLASSES, name);
631 /* copy all the specifications */
633 // we really should do:
635 if (SPEC_what(src)) {
636 if (SPEC_what(dest)) {
637 werror(W_DUPLICATE_SPEC, "what");
639 SPEC_what(dst)|=SPEC_what(src);
642 // but there are more important thing right now
644 SPEC_LONG (dest) |= SPEC_LONG (src);
645 dest->select.s._short|=src->select.s._short;
646 SPEC_USIGN (dest) |= SPEC_USIGN (src);
647 dest->select.s._signed|=src->select.s._signed;
648 SPEC_STAT (dest) |= SPEC_STAT (src);
649 SPEC_EXTR (dest) |= SPEC_EXTR (src);
650 SPEC_CONST(dest) |= SPEC_CONST (src);
651 SPEC_ABSA (dest) |= SPEC_ABSA (src);
652 SPEC_VOLATILE (dest) |= SPEC_VOLATILE (src);
653 SPEC_ADDR (dest) |= SPEC_ADDR (src);
654 SPEC_OCLS (dest) = SPEC_OCLS (src);
655 SPEC_BLEN (dest) |= SPEC_BLEN (src);
656 SPEC_BSTR (dest) |= SPEC_BSTR (src);
657 SPEC_TYPEDEF (dest) |= SPEC_TYPEDEF (src);
658 SPEC_ENUM (dest) |= SPEC_ENUM (src);
659 if (SPEC_ARGREG(src) && !SPEC_ARGREG(dest))
660 SPEC_ARGREG(dest) = SPEC_ARGREG(src);
662 if (IS_STRUCT (dest) && SPEC_STRUCT (dest) == NULL)
663 SPEC_STRUCT (dest) = SPEC_STRUCT (src);
665 /* these are the only function attributes that will be set
666 in a specifier while parsing */
667 FUNC_NONBANKED(dest) |= FUNC_NONBANKED(src);
668 FUNC_BANKED(dest) |= FUNC_BANKED(src);
669 FUNC_ISCRITICAL(dest) |= FUNC_ISCRITICAL(src);
670 FUNC_ISREENT(dest) |= FUNC_ISREENT(src);
671 FUNC_ISNAKED(dest) |= FUNC_ISNAKED(src);
672 FUNC_ISISR(dest) |= FUNC_ISISR(src);
673 FUNC_ISJAVANATIVE(dest) |= FUNC_ISJAVANATIVE(src);
674 FUNC_ISBUILTIN(dest) |= FUNC_ISBUILTIN(src);
675 FUNC_ISOVERLAY(dest) |= FUNC_ISOVERLAY(src);
676 FUNC_INTNO(dest) |= FUNC_INTNO(src);
677 FUNC_REGBANK(dest) |= FUNC_REGBANK(src);
682 /*------------------------------------------------------------------*/
683 /* genSymName - generates and returns a name used for anonymous vars */
684 /*------------------------------------------------------------------*/
686 genSymName (int level)
688 static int gCount = 0;
689 static char gname[SDCC_NAME_MAX + 1];
691 SNPRINTF (gname, sizeof(gname), "__%04d%04d", level, gCount++);
695 /*------------------------------------------------------------------*/
696 /* getSpec - returns the specifier part from a declaration chain */
697 /*------------------------------------------------------------------*/
699 getSpec (sym_link * p)
704 while (p && !(IS_SPEC (p)))
710 /*------------------------------------------------------------------*/
711 /* newCharLink() - creates an char type */
712 /*------------------------------------------------------------------*/
718 p = newLink (SPECIFIER);
719 SPEC_NOUN (p) = V_CHAR;
724 /*------------------------------------------------------------------*/
725 /* newFloatLink - a new Float type */
726 /*------------------------------------------------------------------*/
732 p = newLink (SPECIFIER);
733 SPEC_NOUN (p) = V_FLOAT;
738 /*------------------------------------------------------------------*/
739 /* newLongLink() - new long type */
740 /*------------------------------------------------------------------*/
746 p = newLink (SPECIFIER);
747 SPEC_NOUN (p) = V_INT;
753 /*------------------------------------------------------------------*/
754 /* newIntLink() - creates an int type */
755 /*------------------------------------------------------------------*/
761 p = newLink (SPECIFIER);
762 SPEC_NOUN (p) = V_INT;
767 /*------------------------------------------------------------------*/
768 /* getSize - returns size of a type chain in bits */
769 /*------------------------------------------------------------------*/
771 getSize (sym_link * p)
773 /* if nothing return 0 */
777 { /* if this is the specifier then */
778 switch (SPEC_NOUN (p))
779 { /* depending on the specifier type */
781 return (IS_LONG (p) ? LONGSIZE : INTSIZE);
789 return SPEC_STRUCT (p)->size;
796 return ((SPEC_BLEN (p) / 8) + (SPEC_BLEN (p) % 8 ? 1 : 0));
802 /* this is a declarator */
803 switch (DCL_TYPE (p))
807 return DCL_ELEM (p) * getSize (p->next);
809 // werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
810 // "can not tell the size of an array[]");
830 /*---------------------------------------------------------------------*/
831 /* getAllocSize - returns size of a type chain in bytes for allocation */
832 /*---------------------------------------------------------------------*/
834 getAllocSize (sym_link *p)
836 if (IS_STRUCT (p) && SPEC_STRUCT (p)->type == STRUCT)
838 /* if this is a struct specifier then */
839 /* calculate the size as it could end */
840 /* with an array of unspecified length */
841 symbol *sflds = SPEC_STRUCT (p)->fields;
843 while (sflds && sflds->next)
846 if (sflds && !IS_BITFIELD (sflds->type))
847 return sflds->offset + getAllocSize (sflds->type);
849 return SPEC_STRUCT (p)->size;
855 /*------------------------------------------------------------------*/
856 /* bitsForType - returns # of bits required to store this type */
857 /*------------------------------------------------------------------*/
859 bitsForType (sym_link * p)
861 /* if nothing return 0 */
866 { /* if this is the specifier then */
868 switch (SPEC_NOUN (p))
869 { /* depending on the specifier type */
871 return (IS_LONG (p) ? LONGSIZE * 8 : INTSIZE * 8);
873 return FLOATSIZE * 8;
879 return SPEC_STRUCT (p)->size * 8;
886 return SPEC_BLEN (p);
892 /* this is a specifier */
893 switch (DCL_TYPE (p))
896 return DCL_ELEM (p) * getSize (p->next) * 8;
900 return (PTRSIZE * 8);
905 return (FPTRSIZE * 8);
907 return (GPTRSIZE * 8);
914 /*------------------------------------------------------------------*/
915 /* copySymbolChain - copies a symbol chain */
916 /*------------------------------------------------------------------*/
918 copySymbolChain (symbol * src)
925 dest = copySymbol (src);
926 dest->next = copySymbolChain (src->next);
930 /*------------------------------------------------------------------*/
931 /* copySymbol - makes a copy of a symbol */
932 /*------------------------------------------------------------------*/
934 copySymbol (symbol * src)
941 dest = newSymbol (src->name, src->level);
942 memcpy (dest, src, sizeof (symbol));
943 dest->level = src->level;
944 dest->block = src->block;
945 dest->ival = copyIlist (src->ival);
946 dest->type = copyLinkChain (src->type);
947 dest->etype = getSpec (dest->type);
949 dest->key = src->key;
950 dest->allocreq = src->allocreq;
954 /*------------------------------------------------------------------*/
955 /* reverseSyms - reverses the links for a symbol chain */
956 /*------------------------------------------------------------------*/
958 reverseSyms (symbol * sym)
960 symbol *prev, *curr, *next;
975 sym->next = (void *) NULL;
979 /*------------------------------------------------------------------*/
980 /* reverseLink - reverses the links for a type chain */
981 /*------------------------------------------------------------------*/
983 reverseLink (sym_link * type)
985 sym_link *prev, *curr, *next;
1000 type->next = (void *) NULL;
1004 /*------------------------------------------------------------------*/
1005 /* addSymChain - adds a symbol chain to the symboltable */
1006 /*------------------------------------------------------------------*/
1008 addSymChain (symbol * symHead)
1010 symbol *sym = symHead;
1011 symbol *csym = NULL;
1014 for (; sym != NULL; sym = sym->next)
1016 changePointer(sym->type);
1017 checkTypeSanity(sym->etype, sym->name);
1019 if (!sym->level && !(IS_SPEC(sym->etype) && IS_TYPEDEF(sym->etype)))
1022 /* if already exists in the symbol table then check if
1023 one of them is an extern definition if yes then
1024 then check if the type match, if the types match then
1025 delete the current entry and add the new entry */
1026 if ((csym = findSymWithLevel (SymbolTab, sym)) &&
1027 csym->level == sym->level) {
1029 /* If the previous definition was for an array with incomplete */
1030 /* type, and the new definition has completed the type, update */
1031 /* the original type to match */
1032 if (IS_DECL(csym->type) && DCL_TYPE(csym->type)==ARRAY
1033 && IS_DECL(sym->type) && DCL_TYPE(sym->type)==ARRAY)
1035 if (!DCL_ELEM(csym->type) && DCL_ELEM(sym->type))
1036 DCL_ELEM(csym->type) = DCL_ELEM(sym->type);
1040 /* If only one of the definitions used the "at" keyword, copy */
1041 /* the address to the other. */
1042 if (IS_SPEC(csym->etype) && SPEC_ABSA(csym->etype)
1043 && IS_SPEC(sym->etype) && !SPEC_ABSA(sym->etype))
1045 SPEC_ABSA (sym->etype) = 1;
1046 SPEC_ADDR (sym->etype) = SPEC_ADDR (csym->etype);
1048 if (IS_SPEC(csym->etype) && !SPEC_ABSA(csym->etype)
1049 && IS_SPEC(sym->etype) && SPEC_ABSA(sym->etype))
1051 SPEC_ABSA (csym->etype) = 1;
1052 SPEC_ADDR (csym->etype) = SPEC_ADDR (sym->etype);
1057 if (csym->ival && sym->ival)
1059 if (compareTypeExact (csym->type, sym->type, sym->level) != 1)
1063 /* one definition extern ? */
1064 if (IS_EXTERN (csym->etype) || IS_EXTERN (sym->etype))
1065 werror (E_EXTERN_MISMATCH, sym->name);
1067 werror (E_DUPLICATE, sym->name);
1068 werrorfl (csym->fileDef, csym->lineDef, E_PREVIOUS_DEF);
1070 fprintf (stderr, "from type '");
1071 printTypeChain (csym->type, stderr);
1072 if (IS_SPEC (csym->etype) && SPEC_ABSA (csym->etype))
1073 fprintf(stderr, " at 0x%x", SPEC_ADDR (csym->etype));
1074 fprintf (stderr, "'\nto type '");
1075 printTypeChain (sym->type, stderr);
1076 if (IS_SPEC (sym->etype) && SPEC_ABSA (sym->etype))
1077 fprintf(stderr, " at 0x%x", SPEC_ADDR (sym->etype));
1078 fprintf (stderr, "'\n");
1083 if (csym->ival && !sym->ival)
1084 sym->ival = csym->ival;
1086 /* delete current entry */
1087 deleteSym (SymbolTab, csym, csym->name);
1088 deleteFromSeg(csym);
1092 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
1097 /*------------------------------------------------------------------*/
1098 /* funcInChain - DCL Type 'FUNCTION' found in type chain */
1099 /*------------------------------------------------------------------*/
1101 funcInChain (sym_link * lnk)
1112 /*------------------------------------------------------------------*/
1113 /* structElemType - returns the type info of a struct member */
1114 /*------------------------------------------------------------------*/
1116 structElemType (sym_link * stype, value * id)
1118 symbol *fields = (SPEC_STRUCT (stype) ? SPEC_STRUCT (stype)->fields : NULL);
1119 sym_link *type, *etype;
1120 sym_link *petype = getSpec (stype);
1124 /* look for the id */
1127 if (strcmp (fields->rname, id->name) == 0)
1129 type = copyLinkChain (fields->type);
1130 etype = getSpec (type);
1131 SPEC_SCLS (etype) = (SPEC_SCLS (petype) == S_REGISTER ?
1132 SPEC_SCLS (etype) : SPEC_SCLS (petype));
1134 SPEC_CONST (type) |= SPEC_CONST (stype);
1136 DCL_PTR_CONST (type) |= SPEC_CONST (stype);
1139 fields = fields->next;
1143 werror (E_NOT_MEMBER, id->name);
1145 // the show must go on
1146 return newIntLink();
1149 /*------------------------------------------------------------------*/
1150 /* getStructElement - returns element of a tructure definition */
1151 /*------------------------------------------------------------------*/
1153 getStructElement (structdef * sdef, symbol * sym)
1157 for (field = sdef->fields; field; field = field->next)
1158 if (strcmp (field->name, sym->name) == 0)
1161 werror (E_NOT_MEMBER, sym->name);
1163 return sdef->fields;
1166 /*------------------------------------------------------------------*/
1167 /* compStructSize - computes the size of a structure */
1168 /*------------------------------------------------------------------*/
1170 compStructSize (int su, structdef * sdef)
1172 int sum = 0, usum = 0;
1176 /* for the identifiers */
1177 loop = sdef->fields;
1180 /* create the internal name for this variable */
1181 SNPRINTF (loop->rname, sizeof(loop->rname), "_%s", loop->name);
1186 SPEC_VOLATILE (loop->etype) |= (su == UNION ? 1 : 0);
1188 /* if this is a bit field */
1191 /* change it to a unsigned bit */
1192 SPEC_NOUN (loop->etype) = V_BITFIELD;
1193 SPEC_USIGN (loop->etype) = 1;
1194 SPEC_BLEN (loop->etype) = loop->bitVar;
1196 if (loop->bitVar == BITVAR_PAD) {
1197 /* A zero length bitfield forces padding */
1198 SPEC_BSTR (loop->etype) = bitOffset;
1199 SPEC_BLEN (loop->etype) = 0;
1204 if (bitOffset == 8) {
1208 /* check if this fit into the remaining */
1209 /* bits of this byte else align it to the */
1210 /* next byte boundary */
1211 if (loop->bitVar <= (8 - bitOffset)) {
1212 /* fits into current byte */
1214 SPEC_BSTR (loop->etype) = bitOffset;
1215 bitOffset += loop->bitVar;
1217 else if (!bitOffset) {
1218 /* does not fit, but is already byte aligned */
1220 SPEC_BSTR (loop->etype) = bitOffset;
1221 bitOffset += loop->bitVar;
1224 /* does not fit; need to realign first */
1226 loop->offset = (su == UNION ? sum = 0 : sum);
1228 SPEC_BSTR (loop->etype) = bitOffset;
1229 bitOffset += loop->bitVar;
1231 while (bitOffset>8) {
1238 /* This is a non-bit field. Make sure we are */
1239 /* byte aligned first */
1242 loop->offset = (su == UNION ? sum = 0 : sum);
1246 checkDecl (loop, 1);
1247 sum += getSize (loop->type);
1252 /* if union then size = sizeof largest field */
1254 /* For UNION, round up after each field */
1255 sum += ((bitOffset+7)/8);
1256 usum = max (usum, sum);
1261 /* For STRUCT, round up after all fields processed */
1263 sum += ((bitOffset+7)/8);
1265 return (su == UNION ? usum : sum);
1268 /*-------------------------------------------------------------------*/
1269 /* promoteAnonStructs - promote anonymous struct/union's fields into */
1270 /* an enclosing struct/union */
1271 /*-------------------------------------------------------------------*/
1273 promoteAnonStructs (int su, structdef * sdef)
1282 tofield = &sdef->fields;
1283 field = sdef->fields;
1286 nextfield = field->next;
1287 if (!*field->name && IS_STRUCT (field->type))
1289 /* Found an anonymous struct/union. Replace it */
1290 /* with the fields it contains and adjust all */
1293 base = field->offset;
1294 subfield = copySymbolChain (SPEC_STRUCT (field->type)->fields);
1296 continue; /* just in case it's empty */
1298 *tofield = subfield;
1301 /* check for field name conflicts resulting from promotion */
1302 dupfield = sdef->fields;
1303 while (dupfield && dupfield != subfield)
1305 if (*subfield->name && !strcmp (dupfield->name, subfield->name))
1307 werrorfl (subfield->fileDef, subfield->lineDef,
1309 su==STRUCT ? "struct" : "union",
1311 werrorfl (dupfield->fileDef, dupfield->lineDef,
1314 dupfield = dupfield->next;
1317 subfield->offset += base;
1319 subfield = subfield->next;
1323 subfield->next = nextfield;
1324 tofield = &subfield->next;
1327 tofield = &field->next;
1333 /*------------------------------------------------------------------*/
1334 /* checkSClass - check the storage class specification */
1335 /*------------------------------------------------------------------*/
1337 checkSClass (symbol * sym, int isProto)
1341 if (getenv("DEBUG_SANITY")) {
1342 fprintf (stderr, "checkSClass: %s \n", sym->name);
1345 /* type is literal can happen for enums change
1347 if (SPEC_SCLS (sym->etype) == S_LITERAL && !SPEC_ENUM (sym->etype))
1348 SPEC_SCLS (sym->etype) = S_AUTO;
1350 /* if sfr or sbit then must also be volatile */
1351 if (SPEC_SCLS (sym->etype) == S_SBIT ||
1352 SPEC_SCLS (sym->etype) == S_SFR)
1354 SPEC_VOLATILE (sym->etype) = 1;
1357 /* if absolute address given then it mark it as
1358 volatile -- except in the PIC port */
1360 #if !OPT_DISABLE_PIC || !OPT_DISABLE_PIC16
1361 /* The PIC port uses a different peep hole optimizer based on "pCode" */
1362 if (!TARGET_IS_PIC && !TARGET_IS_PIC16)
1365 if (IS_ABSOLUTE (sym->etype))
1366 SPEC_VOLATILE (sym->etype) = 1;
1368 /* If code memory is read only, then pointers to code memory */
1369 /* implicitly point to constants -- make this explicit */
1371 while (t && t->next) {
1372 if (IS_CODEPTR(t) && port->mem.code_ro) {
1373 if (IS_SPEC(t->next)) {
1374 SPEC_CONST (t->next) = 1;
1376 DCL_PTR_CONST (t->next) = 1;
1382 /* global variables declared const put into code */
1383 /* if no other storage class specified */
1384 if (sym->level == 0 &&
1385 SPEC_SCLS(sym->etype) == S_FIXED &&
1386 !IS_FUNC(sym->type)) {
1387 /* find the first non-array link */
1391 if (IS_CONSTANT (t)) {
1392 SPEC_SCLS (sym->etype) = S_CODE;
1396 /* global variable in code space is a constant */
1397 if (sym->level == 0 &&
1398 SPEC_SCLS (sym->etype) == S_CODE &&
1399 port->mem.code_ro) {
1400 /* find the first non-array link */
1407 DCL_PTR_CONST (t) = 1;
1411 /* if bit variable then no storage class can be */
1412 /* specified since bit is already a storage */
1413 if (IS_BITVAR (sym->etype) &&
1414 (SPEC_SCLS (sym->etype) != S_FIXED &&
1415 SPEC_SCLS (sym->etype) != S_SBIT &&
1416 SPEC_SCLS (sym->etype) != S_BIT)
1419 werror (E_BITVAR_STORAGE, sym->name);
1420 SPEC_SCLS (sym->etype) = S_FIXED;
1423 /* extern variables cannot be initialized */
1424 if (IS_EXTERN (sym->etype) && sym->ival)
1426 werror (E_EXTERN_INIT, sym->name);
1430 /* if this is an automatic symbol */
1431 if (sym->level && (options.stackAuto || reentrant)) {
1432 if ((SPEC_SCLS (sym->etype) == S_AUTO ||
1433 SPEC_SCLS (sym->etype) == S_FIXED ||
1434 SPEC_SCLS (sym->etype) == S_REGISTER ||
1435 SPEC_SCLS (sym->etype) == S_STACK ||
1436 SPEC_SCLS (sym->etype) == S_XSTACK)) {
1437 SPEC_SCLS (sym->etype) = S_AUTO;
1439 /* storage class may only be specified for statics */
1440 if (!IS_STATIC(sym->etype)) {
1441 werror (E_AUTO_ASSUMED, sym->name);
1446 /* automatic symbols cannot be given */
1447 /* an absolute address ignore it */
1449 SPEC_ABSA (sym->etype) &&
1450 (options.stackAuto || reentrant))
1452 werror (E_AUTO_ABSA, sym->name);
1453 SPEC_ABSA (sym->etype) = 0;
1456 /* arrays & pointers cannot be defined for bits */
1457 /* SBITS or SFRs or BIT */
1458 if ((IS_ARRAY (sym->type) || IS_PTR (sym->type)) &&
1459 (SPEC_NOUN (sym->etype) == V_BIT ||
1460 SPEC_NOUN (sym->etype) == V_SBIT ||
1461 SPEC_NOUN (sym->etype) == V_BITFIELD ||
1462 SPEC_SCLS (sym->etype) == S_SFR))
1463 werror (E_BIT_ARRAY, sym->name);
1465 /* if this is a bit|sbit then set length & start */
1466 if (SPEC_NOUN (sym->etype) == V_BIT ||
1467 SPEC_NOUN (sym->etype) == V_SBIT)
1469 SPEC_BLEN (sym->etype) = 1;
1470 SPEC_BSTR (sym->etype) = 0;
1474 /* variables declared in CODE space must have */
1475 /* initializers if not an extern */
1476 if (SPEC_SCLS (sym->etype) == S_CODE &&
1477 sym->ival == NULL &&
1480 port->mem.code_ro &&
1481 !IS_EXTERN (sym->etype) &&
1482 !funcInChain (sym->type))
1483 werror (E_CODE_NO_INIT, sym->name);
1486 /* if parameter or local variable then change */
1487 /* the storage class to reflect where the var will go */
1488 if (sym->level && SPEC_SCLS (sym->etype) == S_FIXED &&
1489 !IS_STATIC(sym->etype))
1491 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
1493 SPEC_SCLS (sym->etype) = (options.useXstack ?
1494 S_XSTACK : S_STACK);
1498 /* hack-o-matic! I see no reason why the useXstack option should ever
1499 * control this allocation, but the code was originally that way, and
1500 * changing it for non-390 ports breaks the compiler badly.
1502 bool useXdata = (TARGET_IS_DS390 || TARGET_IS_DS400) ?
1503 1 : options.useXstack;
1504 SPEC_SCLS (sym->etype) = (useXdata ?
1510 /*------------------------------------------------------------------*/
1511 /* changePointer - change pointer to functions */
1512 /*------------------------------------------------------------------*/
1514 changePointer (sym_link * p)
1517 /* go thru the chain of declarations */
1518 /* if we find a pointer to a function */
1519 /* unconditionally change it to a ptr */
1521 for (; p; p = p->next)
1523 if (!IS_SPEC (p) && DCL_TYPE (p) == UPOINTER)
1524 DCL_TYPE (p) = port->unqualified_pointer;
1525 if (IS_PTR (p) && IS_FUNC (p->next))
1526 DCL_TYPE (p) = CPOINTER;
1530 /*------------------------------------------------------------------*/
1531 /* checkDecl - does semantic validation of a declaration */
1532 /*------------------------------------------------------------------*/
1534 checkDecl (symbol * sym, int isProto)
1537 checkSClass (sym, isProto); /* check the storage class */
1538 changePointer (sym->type); /* change pointers if required */
1540 /* if this is an array without any dimension
1541 then update the dimension from the initial value */
1542 if (IS_ARRAY (sym->type) && !DCL_ELEM (sym->type))
1543 DCL_ELEM (sym->type) = getNelements (sym->type, sym->ival);
1548 /*------------------------------------------------------------------*/
1549 /* copyLinkChain - makes a copy of the link chain & rets ptr 2 head */
1550 /*------------------------------------------------------------------*/
1552 copyLinkChain (sym_link * p)
1554 sym_link *head, *curr, *loop;
1557 head = loop = (curr ? newLink (p->class) : (void *) NULL);
1560 memcpy (loop, curr, sizeof (sym_link)); /* copy it */
1561 loop->next = (curr->next ? newLink (curr->next->class) : (void *) NULL);
1569 /*------------------------------------------------------------------*/
1570 /* cleanUpBlock - cleansup the symbol table specified for all the */
1571 /* symbols in the given block */
1572 /*------------------------------------------------------------------*/
1574 cleanUpBlock (bucket ** table, int block)
1579 /* go thru the entire table */
1580 for (i = 0; i < 256; i++)
1582 for (chain = table[i]; chain; chain = chain->next)
1584 if (chain->block >= block)
1586 deleteSym (table, chain->sym, chain->name);
1592 /*------------------------------------------------------------------*/
1593 /* cleanUpLevel - cleansup the symbol table specified for all the */
1594 /* symbols in the given level */
1595 /*------------------------------------------------------------------*/
1597 cleanUpLevel (bucket ** table, int level)
1602 /* go thru the entire table */
1603 for (i = 0; i < 256; i++)
1605 for (chain = table[i]; chain; chain = chain->next)
1607 if (chain->level >= level)
1609 deleteSym (table, chain->sym, chain->name);
1615 /*------------------------------------------------------------------*/
1616 /* computeTypeOr - computes the resultant type from two types */
1617 /*------------------------------------------------------------------*/
1619 computeTypeOr (sym_link * etype1, sym_link * etype2, sym_link * reType)
1622 assert ( (IS_CHAR (etype1) || IS_BIT (etype1))
1623 && (IS_CHAR (etype2) || IS_BIT (etype2)));
1625 if (SPEC_USIGN (etype1) == SPEC_USIGN (etype2))
1627 SPEC_USIGN (reType) = SPEC_USIGN (etype1);
1631 if (SPEC_USIGN (etype1))
1633 if ( IS_LITERAL (etype2)
1634 && floatFromVal (valFromType (etype2)) >= 0)
1635 SPEC_USIGN (reType) = 1;
1638 /* promote to int */
1639 SPEC_USIGN (reType) = 0;
1640 SPEC_NOUN (reType) = V_INT;
1643 else /* etype1 signed */
1645 if ( IS_LITERAL (etype2)
1646 && floatFromVal (valFromType (etype2)) <= 127)
1647 SPEC_USIGN (reType) = 0;
1650 /* promote to int */
1651 SPEC_USIGN (reType) = 0;
1652 SPEC_NOUN (reType) = V_INT;
1656 if (SPEC_USIGN (etype2))
1658 if ( IS_LITERAL (etype1)
1659 && floatFromVal (valFromType (etype1)) >= 0)
1660 SPEC_USIGN (reType) = 1;
1663 /* promote to int */
1664 SPEC_USIGN (reType) = 0;
1665 SPEC_NOUN (reType) = V_INT;
1668 else /* etype2 signed */
1670 if ( IS_LITERAL (etype1)
1671 && floatFromVal (valFromType (etype1)) <= 127)
1672 SPEC_USIGN (reType) = 0;
1675 /* promote to int */
1676 SPEC_USIGN (reType) = 0;
1677 SPEC_NOUN (reType) = V_INT;
1683 /*------------------------------------------------------------------*/
1684 /* computeType - computes the resultant type from two types */
1685 /*------------------------------------------------------------------*/
1687 computeType (sym_link * type1, sym_link * type2,
1688 RESULT_TYPE resultType, int op)
1692 sym_link *etype1 = getSpec (type1);
1695 etype2 = type2 ? getSpec (type2) : type1;
1697 /* if one of them is a float then result is a float */
1698 /* here we assume that the types passed are okay */
1699 /* and can be cast to one another */
1700 /* which ever is greater in size */
1701 if (IS_FLOAT (etype1) || IS_FLOAT (etype2))
1702 rType = newFloatLink ();
1704 /* if both are bitvars choose the larger one */
1705 if (IS_BITVAR (etype1) && IS_BITVAR (etype2))
1707 rType = SPEC_BLEN (etype1) >= SPEC_BLEN (etype2) ?
1708 copyLinkChain (type1) : copyLinkChain (type1);
1710 /* if only one of them is a bit variable
1711 then the other one prevails */
1712 else if (IS_BITVAR (etype1) && !IS_BITVAR (etype2))
1714 rType = copyLinkChain (type2);
1715 /* bitfield can have up to 16 bits */
1716 if (getSize (etype1) > 1)
1717 SPEC_NOUN (getSpec (rType)) = V_INT;
1719 else if (IS_BITVAR (etype2) && !IS_BITVAR (etype1))
1721 rType = copyLinkChain (type1);
1722 /* bitfield can have up to 16 bits */
1723 if (getSize (etype2) > 1)
1724 SPEC_NOUN (getSpec (rType)) = V_INT;
1727 /* if one of them is a pointer or array then that
1729 if (IS_PTR (type1) || IS_ARRAY (type1))
1730 rType = copyLinkChain (type1);
1731 else if (IS_PTR (type2) || IS_ARRAY (type2))
1732 rType = copyLinkChain (type2);
1733 else if (getSize (type1) > getSize (type2))
1734 rType = copyLinkChain (type1);
1736 rType = copyLinkChain (type2);
1738 reType = getSpec (rType);
1740 /* avoid conflicting types */
1741 reType->select.s._signed = 0;
1743 /* if result is a literal then make not so */
1744 if (IS_LITERAL (reType))
1745 SPEC_SCLS (reType) = S_REGISTER;
1749 case RESULT_TYPE_CHAR:
1750 if (IS_BITVAR (reType))
1752 SPEC_NOUN (reType) = V_CHAR;
1753 SPEC_SCLS (reType) = 0;
1754 SPEC_USIGN (reType) = 0;
1758 case RESULT_TYPE_INT:
1759 case RESULT_TYPE_NONE:
1760 case RESULT_TYPE_OTHER:
1761 if (IS_BIT (reType))
1763 SPEC_NOUN (reType) = V_CHAR;
1764 SPEC_SCLS (reType) = 0;
1765 SPEC_USIGN (reType) = 0;
1768 else if (IS_BITFIELD (reType))
1770 /* could be smarter, but it depends on the op */
1771 /* this is for the worst case: a multiplication of 4 * 4 bit */
1772 SPEC_NOUN (reType) = SPEC_BLEN (reType) <= 4 ? V_CHAR : V_INT;
1773 SPEC_SCLS (reType) = 0;
1774 SPEC_USIGN (reType) = 0;
1777 else if (IS_CHAR (reType))
1779 if (op == '|' || op == '^')
1780 return computeTypeOr (etype1, etype2, reType);
1782 && SPEC_USIGN (etype1) != SPEC_USIGN (etype2))
1784 SPEC_USIGN (reType) = 1;
1789 SPEC_NOUN (reType) = V_INT;
1790 SPEC_USIGN (reType) = 0;
1793 /* TODO: should be in SDCCast.c */
1795 && ( !SPEC_USIGN (etype1)
1796 || !SPEC_USIGN (etype2)))
1798 SPEC_NOUN (reType) = V_INT;
1799 SPEC_USIGN (reType) = 0;
1808 /* SDCC's sign promotion:
1809 - if one or both operands are unsigned, the resultant type will be unsigned
1810 (except char, see below)
1811 - if an operand is promoted to a larger type (char -> int, int -> long),
1812 the larger type will be signed
1814 SDCC tries hard to avoid promotion to int and does 8 bit calculation as
1815 much as possible. We're leaving ISO IEC 9899 here and have to extrapolate
1816 the standard. The standard demands, that the result has to be the same
1817 "as if" the promotion would have been performed:
1819 - if the result of an operation with two char's is promoted to a
1820 larger type, the result will be signed.
1822 More sophisticated are these:
1823 - if the result of an operation with two char's is a char again,
1824 the result will only then be unsigned, if both operands are
1825 unsigned. In all other cases the result will be signed.
1827 This seems to be contradictionary to the first two rules, but it makes
1828 real sense (all types are char's):
1830 A signed char can be negative; this must be preserved in the result
1833 Only if both operands are unsigned it's safe to make the result
1834 unsigned; this helps to avoid overflow:
1837 - ToDo: document '|', '^' and '&'
1839 Homework: - why is (200 * 200 < 0) true?
1840 - why is { char l = 200, r = 200; (r * l > 0) } true?
1843 if (!IS_FLOAT (reType)
1844 && ( (SPEC_USIGN (etype1)
1845 /* if this operand is promoted to a larger type,
1846 then it will be promoted to a signed type */
1847 && !(getSize (etype1) < getSize (reType))
1848 /* char require special handling */
1849 && !IS_CHAR (etype1))
1850 || /* same for 2nd operand */
1851 (SPEC_USIGN (etype2)
1852 && !(getSize (etype2) < getSize (reType))
1853 && !IS_CHAR (etype2))
1854 || /* if both are 'unsigned char' and not promoted
1855 let the result be unsigned too */
1856 ( SPEC_USIGN (etype1)
1857 && SPEC_USIGN (etype2)
1860 && IS_CHAR (reType))))
1861 SPEC_USIGN (reType) = 1;
1863 SPEC_USIGN (reType) = 0;
1868 /*--------------------------------------------------------------------*/
1869 /* compareType - will do type check return 1 if match, -1 if castable */
1870 /*--------------------------------------------------------------------*/
1872 compareType (sym_link * dest, sym_link * src)
1883 /* if dest is a declarator then */
1888 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1890 //checkFunction(src,dest);
1892 return compareType (dest->next, src->next);
1894 if (IS_PTR (dest) && IS_GENPTR (src) && IS_VOID(src->next)) {
1897 if (IS_PTR (src) && IS_GENPTR (dest))
1899 if (IS_PTR (dest) && IS_ARRAY (src)) {
1900 value *val=aggregateToPointer (valFromType(src));
1901 int res=compareType (dest, val->type);
1902 Safe_free(val->type);
1906 if (IS_PTR (dest) && IS_FUNC (dest->next) && IS_FUNC (src))
1907 return compareType (dest->next, src);
1910 else if (IS_PTR (dest) && IS_INTEGRAL (src))
1916 /* if one is a specifier and the other is not */
1917 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
1918 (IS_SPEC (dest) && !IS_SPEC (src)))
1921 /* if one of them is a void then ok */
1922 if (SPEC_NOUN (dest) == V_VOID &&
1923 SPEC_NOUN (src) != V_VOID)
1926 if (SPEC_NOUN (dest) != V_VOID &&
1927 SPEC_NOUN (src) == V_VOID)
1930 /* if they are both bitfields then if the lengths
1931 and starts don't match */
1932 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
1933 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
1934 SPEC_BSTR (dest) != SPEC_BSTR (src)))
1937 /* it is a specifier */
1938 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
1940 if (SPEC_USIGN (dest) == SPEC_USIGN (src) &&
1941 IS_INTEGRAL (dest) && IS_INTEGRAL (src) &&
1943 bitsForType (dest) == bitsForType (src))
1944 instead of the next two lines, but the regression tests fail with
1945 them; I guess it's a problem with replaceCheaperOp */
1946 getSize (dest) == getSize (src) &&
1947 !(!IS_BIT (dest) && IS_BIT (src)))
1949 else if (IS_ARITHMETIC (dest) && IS_ARITHMETIC (src))
1954 else if (IS_STRUCT (dest))
1956 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
1961 if (SPEC_LONG (dest) != SPEC_LONG (src))
1964 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
1970 /*--------------------------------------------------------------------*/
1971 /* compareTypeExact - will do type check return 1 if match exactly */
1972 /*--------------------------------------------------------------------*/
1974 compareTypeExact (sym_link * dest, sym_link * src, int level)
1976 STORAGE_CLASS srcScls, destScls;
1987 /* if dest is a declarator then */
1992 if (DCL_TYPE (src) == DCL_TYPE (dest)) {
1993 if ((DCL_TYPE (src) == ARRAY) && (DCL_ELEM (src) != DCL_ELEM (dest)))
1995 if (DCL_PTR_CONST (src) != DCL_PTR_CONST (dest))
1997 if (DCL_PTR_VOLATILE (src) != DCL_PTR_VOLATILE (dest))
2001 value *exargs, *acargs, *checkValue;
2003 /* verify function return type */
2004 if (!compareTypeExact (dest->next, src->next, -1))
2006 if (FUNC_ISISR (dest) != FUNC_ISISR (src))
2008 if (FUNC_REGBANK (dest) != FUNC_REGBANK (src))
2010 if (IFFUNC_ISNAKED (dest) != IFFUNC_ISNAKED (src))
2013 if (IFFUNC_ISREENT (dest) != IFFUNC_ISREENT (src) && argCnt>1)
2017 /* compare expected args with actual args */
2018 exargs = FUNC_ARGS(dest);
2019 acargs = FUNC_ARGS(src);
2021 /* for all the expected args do */
2022 for (; exargs && acargs; exargs = exargs->next, acargs = acargs->next)
2024 //checkTypeSanity(acargs->etype, acargs->name);
2026 if (IS_AGGREGATE (acargs->type))
2028 checkValue = copyValue (acargs);
2029 aggregateToPointer (checkValue);
2032 checkValue = acargs;
2035 if (!compareTypeExact (exargs->type, checkValue->type, -1))
2040 /* if one them ended we have a problem */
2041 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2042 (!exargs && acargs && !IS_VOID (acargs->type)))
2046 return compareTypeExact (dest->next, src->next, level);
2053 /* if one is a specifier and the other is not */
2054 if ((IS_SPEC (src) && !IS_SPEC (dest)) ||
2055 (IS_SPEC (dest) && !IS_SPEC (src)))
2058 /* if one of them is a void then ok */
2059 if (SPEC_NOUN (dest) != SPEC_NOUN (src))
2062 /* if they are both bitfields then if the lengths
2063 and starts don't match */
2064 if (IS_BITFIELD (dest) && IS_BITFIELD (src) &&
2065 (SPEC_BLEN (dest) != SPEC_BLEN (src) ||
2066 SPEC_BSTR (dest) != SPEC_BSTR (src)))
2069 if (IS_INTEGRAL (dest))
2071 /* signedness must match */
2072 if (SPEC_USIGN (dest) != SPEC_USIGN (src))
2074 /* size must match */
2075 if (SPEC_LONG (dest) != SPEC_LONG (src))
2077 if (SPEC_SHORT (dest) != SPEC_SHORT (src))
2081 if (IS_STRUCT (dest))
2083 if (SPEC_STRUCT (dest) != SPEC_STRUCT (src))
2087 if (SPEC_CONST (dest) != SPEC_CONST (src))
2089 if (SPEC_VOLATILE (dest) != SPEC_VOLATILE (src))
2091 if (SPEC_STAT (dest) != SPEC_STAT (src))
2093 if (SPEC_ABSA (dest) != SPEC_ABSA (src))
2095 if (SPEC_ABSA (dest) && SPEC_ADDR (dest) != SPEC_ADDR (src))
2098 destScls = SPEC_SCLS (dest);
2099 srcScls = SPEC_SCLS (src);
2101 /* Compensate for const to const code change in checkSClass() */
2102 if (!level & port->mem.code_ro && SPEC_CONST (dest))
2104 if (srcScls == S_CODE && destScls == S_FIXED)
2106 if (destScls == S_CODE && srcScls == S_FIXED)
2110 /* compensate for allocGlobal() */
2111 if ((srcScls == S_FIXED || srcScls == S_AUTO)
2112 && port->mem.default_globl_map == xdata
2116 if (level>0 && !SPEC_STAT (dest))
2118 /* Compensate for hack-o-matic in checkSClass() */
2119 if (options.stackAuto || (currFunc && IFFUNC_ISREENT (currFunc->type)))
2121 if (destScls == S_FIXED)
2122 destScls = (options.useXstack ? S_XSTACK : S_STACK);
2123 if (srcScls == S_FIXED)
2124 srcScls = (options.useXstack ? S_XSTACK : S_STACK);
2126 else if (TARGET_IS_DS390 || TARGET_IS_DS400 || options.useXstack)
2128 if (destScls == S_FIXED)
2130 if (srcScls == S_FIXED)
2135 if (srcScls != destScls)
2138 printf ("level = %d\n", level);
2139 printf ("SPEC_SCLS (src) = %d, SPEC_SCLS (dest) = %d\n",
2140 SPEC_SCLS (src), SPEC_SCLS (dest));
2141 printf ("srcScls = %d, destScls = %d\n",srcScls, destScls);
2149 /*------------------------------------------------------------------*/
2150 /* inCalleeSaveList - return 1 if found in callee save list */
2151 /*------------------------------------------------------------------*/
2153 calleeCmp(void *p1, void *p2)
2155 return (strcmp((char *)p1, (char *)(p2)) == 0);
2159 inCalleeSaveList(char *s)
2161 if (options.all_callee_saves)
2163 return isinSetWith(options.calleeSavesSet, s, calleeCmp);
2166 /*-----------------------------------------------------------------*/
2167 /* aggregateToPointer: change an agggregate type function */
2168 /* argument to a pointer to that type. */
2169 /*-----------------------------------------------------------------*/
2171 aggregateToPointer (value * val)
2173 if (IS_AGGREGATE (val->type))
2175 /* if this is a structure */
2176 /* then we need to add a new link */
2177 if (IS_STRUCT (val->type))
2179 /* first lets add DECLARATOR type */
2180 sym_link *p = val->type;
2182 werror (W_STRUCT_AS_ARG, val->name);
2183 val->type = newLink (DECLARATOR);
2184 val->type->next = p;
2187 /* change to a pointer depending on the */
2188 /* storage class specified */
2189 switch (SPEC_SCLS (val->etype))
2192 DCL_TYPE (val->type) = IPOINTER;
2195 DCL_TYPE (val->type) = PPOINTER;
2198 if (SPEC_OCLS(val->etype)) {
2199 DCL_TYPE(val->type)=PTR_TYPE(SPEC_OCLS(val->etype));
2201 // this happens for (external) function parameters
2202 DCL_TYPE (val->type) = port->unqualified_pointer;
2208 DCL_TYPE (val->type) = POINTER;
2211 DCL_TYPE (val->type) = CPOINTER;
2214 DCL_TYPE (val->type) = FPOINTER;
2217 DCL_TYPE (val->type) = EEPPOINTER;
2220 DCL_TYPE (val->type) = port->unqualified_pointer;
2223 /* is there is a symbol associated then */
2224 /* change the type of the symbol as well */
2227 val->sym->type = copyLinkChain (val->type);
2228 val->sym->etype = getSpec (val->sym->type);
2233 /*------------------------------------------------------------------*/
2234 /* checkFunction - does all kinds of check on a function */
2235 /*------------------------------------------------------------------*/
2237 checkFunction (symbol * sym, symbol *csym)
2239 value *exargs, *acargs;
2243 if (getenv("DEBUG_SANITY")) {
2244 fprintf (stderr, "checkFunction: %s ", sym->name);
2247 if (!IS_DECL(sym->type) || DCL_TYPE(sym->type)!=FUNCTION)
2249 werror(E_SYNTAX_ERROR, sym->name);
2253 /* make sure the type is complete and sane */
2254 checkTypeSanity(((symbol *)sym)->etype, ((symbol *)sym)->name);
2256 /* if not type then some kind of error */
2260 /* if the function has no type then make it return int */
2261 if (!sym->type->next)
2262 sym->type->next = sym->etype = newIntLink ();
2264 /* function cannot return aggregate */
2265 if (IS_AGGREGATE (sym->type->next))
2267 werror (E_FUNC_AGGR, sym->name);
2271 /* function cannot return bit */
2272 if (IS_BITVAR (sym->type->next))
2274 werror (E_FUNC_BIT, sym->name);
2278 /* check if this function is defined as calleeSaves
2279 then mark it as such */
2280 FUNC_CALLEESAVES(sym->type) = inCalleeSaveList (sym->name);
2282 /* if interrupt service routine */
2283 /* then it cannot have arguments */
2284 if (IFFUNC_ARGS(sym->type) && FUNC_ISISR (sym->type))
2286 if (!IS_VOID(FUNC_ARGS(sym->type)->type)) {
2287 werror (E_INT_ARGS, sym->name);
2288 FUNC_ARGS(sym->type)=NULL;
2292 for (argCnt=1, acargs = FUNC_ARGS(sym->type);
2294 acargs=acargs->next, argCnt++) {
2296 // this can happen for reentrant functions
2297 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2298 // the show must go on: synthesize a name and symbol
2299 SNPRINTF (acargs->name, sizeof(acargs->name), "_%s_PARM_%d", sym->name, argCnt);
2300 acargs->sym = newSymbol (acargs->name, 1);
2301 SPEC_OCLS (acargs->etype) = istack;
2302 acargs->sym->type = copyLinkChain (acargs->type);
2303 acargs->sym->etype = getSpec (acargs->sym->type);
2304 acargs->sym->_isparm = 1;
2305 strncpyz (acargs->sym->rname, acargs->name, sizeof(acargs->sym->rname));
2306 } else if (strcmp(acargs->sym->name, acargs->sym->rname)==0) {
2308 werror(E_PARAM_NAME_OMITTED, sym->name, argCnt);
2313 if (!csym && !(csym = findSym (SymbolTab, sym, sym->name)))
2314 return 1; /* not defined nothing more to check */
2316 /* check if body already present */
2317 if (csym && IFFUNC_HASBODY(csym->type))
2319 werror (E_FUNC_BODY, sym->name);
2323 /* check the return value type */
2324 if (compareType (csym->type, sym->type) <= 0)
2326 werror (E_PREV_DEF_CONFLICT, csym->name, "type");
2327 printFromToType(csym->type, sym->type);
2331 if (FUNC_ISISR (csym->type) != FUNC_ISISR (sym->type))
2333 werror (E_PREV_DEF_CONFLICT, csym->name, "interrupt");
2336 /* I don't think this is necessary for interrupts. An isr is a */
2337 /* root in the calling tree. */
2338 if ((FUNC_REGBANK (csym->type) != FUNC_REGBANK (sym->type)) &&
2339 (!FUNC_ISISR (sym->type)))
2341 werror (E_PREV_DEF_CONFLICT, csym->name, "using");
2344 if (IFFUNC_ISNAKED (csym->type) != IFFUNC_ISNAKED (sym->type))
2346 werror (E_PREV_DEF_CONFLICT, csym->name, "_naked");
2349 /* Really, reentrant should match regardless of argCnt, but */
2350 /* this breaks some existing code (the fp lib functions). If */
2351 /* the first argument is always passed the same way, this */
2352 /* lax checking is ok (but may not be true for in future ports) */
2353 if (IFFUNC_ISREENT (csym->type) != IFFUNC_ISREENT (sym->type)
2356 //printf("argCnt = %d\n",argCnt);
2357 werror (E_PREV_DEF_CONFLICT, csym->name, "reentrant");
2360 /* compare expected args with actual args */
2361 exargs = FUNC_ARGS(csym->type);
2362 acargs = FUNC_ARGS(sym->type);
2364 /* for all the expected args do */
2367 exargs = exargs->next, acargs = acargs->next, argCnt++)
2369 if (getenv("DEBUG_SANITY")) {
2370 fprintf (stderr, "checkFunction: %s ", exargs->name);
2372 /* make sure the type is complete and sane */
2373 checkTypeSanity(exargs->etype, exargs->name);
2375 /* If the actual argument is an array, any prototype
2376 * will have modified it to a pointer. Duplicate that
2379 if (IS_AGGREGATE (acargs->type))
2381 checkValue = copyValue (acargs);
2382 aggregateToPointer (checkValue);
2386 checkValue = acargs;
2389 if (compareType (exargs->type, checkValue->type) <= 0)
2391 werror (E_ARG_TYPE, argCnt);
2392 printFromToType(exargs->type, checkValue->type);
2397 /* if one them ended we have a problem */
2398 if ((exargs && !acargs && !IS_VOID (exargs->type)) ||
2399 (!exargs && acargs && !IS_VOID (acargs->type)))
2400 werror (E_ARG_COUNT);
2402 /* replace with this defition */
2403 sym->cdef = csym->cdef;
2404 deleteSym (SymbolTab, csym, csym->name);
2405 deleteFromSeg(csym);
2406 addSym (SymbolTab, sym, sym->name, sym->level, sym->block, 1);
2407 if (IS_EXTERN (csym->etype) && !
2408 IS_EXTERN (sym->etype))
2410 addSet (&publics, sym);
2415 /*------------------------------------------------------------------*/
2416 /* cdbStructBlock - calls struct printing for a blcks */
2417 /*------------------------------------------------------------------*/
2418 void cdbStructBlock (int block)
2421 bucket **table = StructTab;
2424 /* go thru the entire table */
2425 for (i = 0; i < 256; i++)
2427 for (chain = table[i]; chain; chain = chain->next)
2429 if (chain->block >= block)
2432 debugFile->writeType((structdef *)chain->sym, chain->block, 0, NULL);
2438 /*-----------------------------------------------------------------*/
2439 /* processFuncArgs - does some processing with function args */
2440 /*-----------------------------------------------------------------*/
2442 processFuncArgs (symbol * func)
2446 sym_link *funcType=func->type;
2448 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
2449 fprintf (stderr, "SDCCsymt.c:processFuncArgs(%s)\n", func->name);
2451 /* find the function declaration within the type */
2452 while (funcType && !IS_FUNC(funcType))
2453 funcType=funcType->next;
2455 /* if this function has variable argument list */
2456 /* then make the function a reentrant one */
2457 if (IFFUNC_HASVARARGS(funcType) || (options.stackAuto && !func->cdef))
2458 FUNC_ISREENT(funcType)=1;
2460 /* check if this function is defined as calleeSaves
2461 then mark it as such */
2462 FUNC_CALLEESAVES(funcType) = inCalleeSaveList (func->name);
2464 /* loop thru all the arguments */
2465 val = FUNC_ARGS(funcType);
2467 /* if it is void then remove parameters */
2468 if (val && IS_VOID (val->type))
2470 FUNC_ARGS(funcType) = NULL;
2474 /* reset regparm for the port */
2475 (*port->reset_regparms) ();
2477 /* if any of the arguments is an aggregate */
2478 /* change it to pointer to the same type */
2482 char buffer[SDCC_NAME_MAX+1];
2484 SNPRINTF (buffer, sizeof(buffer), "%s parameter %d", func->name, pNum);
2485 checkTypeSanity (val->etype, buffer);
2487 /* mark it as a register parameter if
2488 the function does not have VA_ARG
2489 and as port dictates */
2490 if (!IFFUNC_HASVARARGS(funcType) &&
2491 (argreg = (*port->reg_parm) (val->type)))
2493 SPEC_REGPARM (val->etype) = 1;
2494 SPEC_ARGREG(val->etype) = argreg;
2495 } else if (IFFUNC_ISREENT(funcType)) {
2496 FUNC_HASSTACKPARM(funcType) = 1;
2499 if (IS_AGGREGATE (val->type))
2501 aggregateToPointer (val);
2508 /* if this is an internal generated function call */
2510 /* ignore --stack-auto for this one, we don't know how it is compiled */
2511 /* simply trust on --int-long-reent or --float-reent */
2512 if (IFFUNC_ISREENT(funcType)) {
2516 /* if this function is reentrant or */
2517 /* automatics r 2b stacked then nothing */
2518 if (IFFUNC_ISREENT (funcType) || options.stackAuto)
2522 val = FUNC_ARGS(funcType);
2527 /* if a symbolname is not given */
2528 /* synthesize a variable name */
2531 SNPRINTF (val->name, sizeof(val->name),
2532 "_%s_PARM_%d", func->name, pNum++);
2533 val->sym = newSymbol (val->name, 1);
2534 if (SPEC_SCLS(val->etype) == S_BIT)
2535 SPEC_OCLS (val->etype) = bit;
2537 SPEC_OCLS (val->etype) = port->mem.default_local_map;
2538 val->sym->type = copyLinkChain (val->type);
2539 val->sym->etype = getSpec (val->sym->type);
2540 val->sym->_isparm = 1;
2541 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2543 /* ?? static functions shouldn't imply static parameters - EEP */
2544 if (IS_SPEC(func->etype)) {
2545 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2546 SPEC_STAT (func->etype);
2549 addSymChain (val->sym);
2552 else /* symbol name given create synth name */
2555 SNPRINTF (val->name, sizeof(val->name), "_%s_PARM_%d", func->name, pNum++);
2556 strncpyz (val->sym->rname, val->name, sizeof(val->sym->rname));
2557 val->sym->_isparm = 1;
2558 if (SPEC_SCLS(val->etype) == S_BIT)
2559 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) = bit;
2561 SPEC_OCLS (val->etype) = SPEC_OCLS (val->sym->etype) =
2562 (options.model != MODEL_SMALL ? xdata : data);
2565 /* ?? static functions shouldn't imply static parameters - EEP */
2566 if (IS_SPEC(func->etype)) {
2567 SPEC_STAT (val->etype) = SPEC_STAT (val->sym->etype) =
2568 SPEC_STAT (func->etype);
2572 if (!isinSet(operKeyReset, val->sym)) {
2573 addSet (&operKeyReset, val->sym);
2574 applyToSet (operKeyReset, resetParmKey);
2580 /*-----------------------------------------------------------------*/
2581 /* isSymbolEqual - compares two symbols return 1 if they match */
2582 /*-----------------------------------------------------------------*/
2584 isSymbolEqual (symbol * dest, symbol * src)
2586 /* if pointers match then equal */
2590 /* if one of them is null then don't match */
2594 /* if both of them have rname match on rname */
2595 if (dest->rname[0] && src->rname[0])
2596 return (!strcmp (dest->rname, src->rname));
2598 /* otherwise match on name */
2599 return (!strcmp (dest->name, src->name));
2602 void PT(sym_link *type)
2604 printTypeChain(type,0);
2606 /*-----------------------------------------------------------------*/
2607 /* printTypeChain - prints the type chain in human readable form */
2608 /*-----------------------------------------------------------------*/
2610 printTypeChain (sym_link * start, FILE * of)
2614 sym_link * type, * search;
2624 fprintf (of, "void");
2628 /* Print the chain as it is written in the source: */
2629 /* start with the last entry. */
2630 /* However, the storage class at the end of the */
2631 /* chain reall applies to the first in the chain! */
2633 for (type = start; type && type->next; type = type->next)
2636 scls=SPEC_SCLS(type);
2644 case S_DATA: fprintf (of, "data-"); break;
2645 case S_XDATA: fprintf (of, "xdata-"); break;
2646 case S_SFR: fprintf (of, "sfr-"); break;
2647 case S_SBIT: fprintf (of, "sbit-"); break;
2648 case S_CODE: fprintf (of, "code-"); break;
2649 case S_IDATA: fprintf (of, "idata-"); break;
2650 case S_PDATA: fprintf (of, "pdata-"); break;
2651 case S_LITERAL: fprintf (of, "literal-"); break;
2652 case S_STACK: fprintf (of, "stack-"); break;
2653 case S_XSTACK: fprintf (of, "xstack-"); break;
2654 case S_BIT: fprintf (of, "bit-"); break;
2655 case S_EEPROM: fprintf (of, "eeprom-"); break;
2662 if (!IS_FUNC(type)) {
2663 if (DCL_PTR_VOLATILE (type)) {
2664 fprintf (of, "volatile-");
2666 if (DCL_PTR_CONST (type)) {
2667 fprintf (of, "const-");
2670 switch (DCL_TYPE (type))
2673 fprintf (of, "function %s %s",
2674 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2675 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2677 for (args = FUNC_ARGS(type);
2680 printTypeChain(args->type, of);
2687 fprintf (of, "generic* ");
2690 fprintf (of, "code* ");
2693 fprintf (of, "xdata* ");
2696 fprintf (of, "eeprom* ");
2699 fprintf (of, "near* ");
2702 fprintf (of, "idata* ");
2705 fprintf (of, "pdata* ");
2708 fprintf (of, "unknown* ");
2711 if (DCL_ELEM(type)) {
2712 fprintf (of, "[%d] ", DCL_ELEM(type));
2714 fprintf (of, "[] ");
2721 if (SPEC_VOLATILE (type))
2722 fprintf (of, "volatile-");
2723 if (SPEC_CONST (type))
2724 fprintf (of, "const-");
2725 if (SPEC_USIGN (type))
2726 fprintf (of, "unsigned-");
2727 switch (SPEC_NOUN (type))
2731 fprintf (of, "long-");
2732 fprintf (of, "int");
2736 fprintf (of, "char");
2740 fprintf (of, "void");
2744 fprintf (of, "float");
2748 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2752 fprintf (of, "sbit");
2756 fprintf (of, "bit");
2760 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2764 fprintf (of, "double");
2768 fprintf (of, "unknown type");
2772 /* search entry in list before "type" */
2773 for (search = start; search && search->next != type;)
2774 search = search->next;
2783 /*--------------------------------------------------------------------*/
2784 /* printTypeChainRaw - prints the type chain in human readable form */
2785 /* in the raw data structure ordering */
2786 /*--------------------------------------------------------------------*/
2788 printTypeChainRaw (sym_link * start, FILE * of)
2801 fprintf (of, "void");
2811 if (!IS_FUNC(type)) {
2812 if (DCL_PTR_VOLATILE (type)) {
2813 fprintf (of, "volatile-");
2815 if (DCL_PTR_CONST (type)) {
2816 fprintf (of, "const-");
2819 switch (DCL_TYPE (type))
2822 fprintf (of, "function %s %s",
2823 (IFFUNC_ISBUILTIN(type) ? "__builtin__" : " "),
2824 (IFFUNC_ISJAVANATIVE(type) ? "_JavaNative" : " "));
2826 for (args = FUNC_ARGS(type);
2829 printTypeChain(args->type, of);
2836 fprintf (of, "generic* ");
2839 fprintf (of, "code* ");
2842 fprintf (of, "xdata* ");
2845 fprintf (of, "eeprom* ");
2848 fprintf (of, "near* ");
2851 fprintf (of, "idata* ");
2854 fprintf (of, "pdata* ");
2857 fprintf (of, "unknown* ");
2860 if (DCL_ELEM(type)) {
2861 fprintf (of, "[%d] ", DCL_ELEM(type));
2863 fprintf (of, "[] ");
2867 if (DCL_TSPEC(type))
2870 printTypeChainRaw(DCL_TSPEC(type), of);
2874 else if (IS_SPEC (type))
2876 switch (SPEC_SCLS (type))
2878 case S_DATA: fprintf (of, "data-"); break;
2879 case S_XDATA: fprintf (of, "xdata-"); break;
2880 case S_SFR: fprintf (of, "sfr-"); break;
2881 case S_SBIT: fprintf (of, "sbit-"); break;
2882 case S_CODE: fprintf (of, "code-"); break;
2883 case S_IDATA: fprintf (of, "idata-"); break;
2884 case S_PDATA: fprintf (of, "pdata-"); break;
2885 case S_LITERAL: fprintf (of, "literal-"); break;
2886 case S_STACK: fprintf (of, "stack-"); break;
2887 case S_XSTACK: fprintf (of, "xstack-"); break;
2888 case S_BIT: fprintf (of, "bit-"); break;
2889 case S_EEPROM: fprintf (of, "eeprom-"); break;
2892 if (SPEC_VOLATILE (type))
2893 fprintf (of, "volatile-");
2894 if (SPEC_CONST (type))
2895 fprintf (of, "const-");
2896 if (SPEC_USIGN (type))
2897 fprintf (of, "unsigned-");
2898 switch (SPEC_NOUN (type))
2902 fprintf (of, "long-");
2903 fprintf (of, "int");
2907 fprintf (of, "char");
2911 fprintf (of, "void");
2915 fprintf (of, "float");
2919 fprintf (of, "struct %s", SPEC_STRUCT (type)->tag);
2923 fprintf (of, "sbit");
2927 fprintf (of, "bit");
2931 fprintf (of, "bitfield {%d,%d}", SPEC_BSTR (type), SPEC_BLEN (type));
2935 fprintf (of, "double");
2939 fprintf (of, "unknown type");
2944 fprintf (of, "NOT_SPEC_OR_DECL");
2954 /*-----------------------------------------------------------------*/
2955 /* powof2 - returns power of two for the number if number is pow 2 */
2956 /*-----------------------------------------------------------------*/
2958 powof2 (TYPE_UDWORD num)
2971 if (n1s > 1 || nshifts == 0)
2987 /* Dims: mul/div/mod, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2988 symbol *__muldiv[3][3][2];
2989 /* Dims: BYTE/WORD/DWORD SIGNED/UNSIGNED */
2990 sym_link *__multypes[3][2];
2991 /* Dims: to/from float, BYTE/WORD/DWORD, SIGNED/USIGNED */
2992 symbol *__conv[2][3][2];
2993 /* Dims: shift left/shift right, BYTE/WORD/DWORD, SIGNED/UNSIGNED */
2994 symbol *__rlrr[2][3][2];
2996 sym_link *floatType;
2999 _mangleFunctionName(char *in)
3001 if (port->getMangledFunctionName)
3003 return port->getMangledFunctionName(in);
3011 /*-----------------------------------------------------------------*/
3012 /* typeFromStr - create a typechain from an encoded string */
3013 /* basic types - 'c' - char */
3019 /* '*' - pointer - default (GPOINTER) */
3020 /* modifiers - 'u' - unsigned */
3021 /* pointer modifiers - 'g' - generic */
3025 /* 'F' - function */
3026 /* examples : "ig*" - generic int * */
3027 /* "cx*" - char xdata * */
3028 /* "ui" - unsigned int */
3029 /*-----------------------------------------------------------------*/
3030 sym_link *typeFromStr (char *s)
3032 sym_link *r = newLink(DECLARATOR);
3044 r->class = SPECIFIER;
3045 SPEC_NOUN(r) = V_CHAR;
3049 r->class = SPECIFIER;
3050 SPEC_NOUN(r) = V_INT;
3053 r->class = SPECIFIER;
3054 SPEC_NOUN(r) = V_INT;
3058 r->class = SPECIFIER;
3059 SPEC_NOUN(r) = V_FLOAT;
3062 r->class = SPECIFIER;
3063 SPEC_NOUN(r) = V_VOID;
3066 DCL_TYPE(r) = port->unqualified_pointer;
3073 assert(*(s+1)=='*');
3074 nr = newLink(DECLARATOR);
3079 DCL_TYPE(r) = GPOINTER;
3082 DCL_TYPE(r) = FPOINTER;
3085 DCL_TYPE(r) = CPOINTER;
3088 DCL_TYPE(r) = POINTER;
3091 DCL_TYPE(r) = FUNCTION;
3092 nr = newLink(DECLARATOR);
3095 DCL_TYPE(r) = CPOINTER;
3101 werror(E_INTERNAL_ERROR, __FILE__, __LINE__,
3102 "typeFromStr: unknown type");
3105 if (IS_SPEC(r) && usign) {
3114 /*-----------------------------------------------------------------*/
3115 /* initCSupport - create functions for C support routines */
3116 /*-----------------------------------------------------------------*/
3120 const char *smuldivmod[] =
3124 const char *sbwd[] =
3126 "char", "int", "long"
3132 const char *srlrr[] =
3137 int bwd, su, muldivmod, tofrom, rlrr;
3139 if (getenv("SDCC_NO_C_SUPPORT")) {
3140 /* for debugging only */
3144 floatType = newFloatLink ();
3146 for (bwd = 0; bwd < 3; bwd++)
3163 __multypes[bwd][0] = l;
3164 __multypes[bwd][1] = copyLinkChain (l);
3165 SPEC_USIGN (__multypes[bwd][1]) = 1;
3168 __fsadd = funcOfType ("__fsadd", floatType, floatType, 2, options.float_rent);
3169 __fssub = funcOfType ("__fssub", floatType, floatType, 2, options.float_rent);
3170 __fsmul = funcOfType ("__fsmul", floatType, floatType, 2, options.float_rent);
3171 __fsdiv = funcOfType ("__fsdiv", floatType, floatType, 2, options.float_rent);
3172 __fseq = funcOfType ("__fseq", CHARTYPE, floatType, 2, options.float_rent);
3173 __fsneq = funcOfType ("__fsneq", CHARTYPE, floatType, 2, options.float_rent);
3174 __fslt = funcOfType ("__fslt", CHARTYPE, floatType, 2, options.float_rent);
3175 __fslteq = funcOfType ("__fslteq", CHARTYPE, floatType, 2, options.float_rent);
3176 __fsgt = funcOfType ("__fsgt", CHARTYPE, floatType, 2, options.float_rent);
3177 __fsgteq = funcOfType ("__fsgteq", CHARTYPE, floatType, 2, options.float_rent);
3179 for (tofrom = 0; tofrom < 2; tofrom++)
3181 for (bwd = 0; bwd < 3; bwd++)
3183 for (su = 0; su < 2; su++)
3187 SNPRINTF (buffer, sizeof(buffer), "__fs2%s%s", ssu[su], sbwd[bwd]);
3188 __conv[tofrom][bwd][su] = funcOfType (buffer, __multypes[bwd][su], floatType, 1, options.float_rent);
3192 SNPRINTF (buffer, sizeof(buffer), "__%s%s2fs", ssu[su], sbwd[bwd]);
3193 __conv[tofrom][bwd][su] = funcOfType (buffer, floatType, __multypes[bwd][su], 1, options.float_rent);
3200 for (muldivmod = 0; muldivmod < 3; muldivmod++)
3202 for (bwd = 0; bwd < 3; bwd++)
3204 for (su = 0; su < 2; su++)
3206 SNPRINTF (buffer, sizeof(buffer),
3208 smuldivmod[muldivmod],
3211 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3212 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3217 muluint() and mulsint() resp. mululong() and mulslong() return the same result.
3218 Therefore they've been merged into mulint() and mullong().
3221 for (bwd = 0; bwd < 3; bwd++)
3223 for (su = 0; su < 2; su++)
3225 for (muldivmod = 1; muldivmod < 3; muldivmod++)
3228 SNPRINTF (buffer, sizeof(buffer),
3230 smuldivmod[muldivmod],
3233 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3234 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3242 for (su = 0; su < 2; su++)
3244 /* muluchar and mulschar are still separate functions, because e.g. the z80
3245 port is sign/zero-extending to int before calling mulint() */
3246 SNPRINTF (buffer, sizeof(buffer),
3248 smuldivmod[muldivmod],
3251 __muldiv[muldivmod][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3252 FUNC_NONBANKED (__muldiv[muldivmod][bwd][su]->type) = 1;
3256 /* word and doubleword */
3257 for (bwd = 1; bwd < 3; bwd++)
3260 SNPRINTF (buffer, sizeof(buffer),
3262 smuldivmod[muldivmod],
3264 __muldiv[muldivmod][bwd][0] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[bwd][su], 2, options.intlong_rent);
3265 FUNC_NONBANKED (__muldiv[muldivmod][bwd][0]->type) = 1;
3266 /* signed = unsigned */
3267 __muldiv[muldivmod][bwd][1] = __muldiv[muldivmod][bwd][0];
3270 for (rlrr = 0; rlrr < 2; rlrr++)
3272 for (bwd = 0; bwd < 3; bwd++)
3274 for (su = 0; su < 2; su++)
3276 SNPRINTF (buffer, sizeof(buffer),
3281 __rlrr[rlrr][bwd][su] = funcOfType (_mangleFunctionName(buffer), __multypes[bwd][su], __multypes[0][0], 2, options.intlong_rent);
3282 FUNC_NONBANKED (__rlrr[rlrr][bwd][su]->type) = 1;
3288 /*-----------------------------------------------------------------*/
3289 /* initBuiltIns - create prototypes for builtin functions */
3290 /*-----------------------------------------------------------------*/
3296 if (!port->builtintable) return ;
3298 for (i = 0 ; port->builtintable[i].name ; i++) {
3299 sym = funcOfTypeVarg(port->builtintable[i].name,port->builtintable[i].rtype,
3300 port->builtintable[i].nParms,port->builtintable[i].parm_types);
3301 FUNC_ISBUILTIN(sym->type) = 1;
3302 FUNC_ISREENT(sym->type) = 0; /* can never be reentrant */
3306 sym_link *validateLink(sym_link *l,
3313 if (l && l->class==select)
3318 "Internal error: validateLink failed in %s(%s) @ %s:%u:"
3319 " expected %s, got %s\n",
3320 macro, args, file, line,
3321 DECLSPEC2TXT(select), l ? DECLSPEC2TXT(l->class) : "null-link");
3323 return l; // never reached, makes compiler happy.
3326 /*--------------------------------------------------------------------*/
3327 /* newEnumType - create an integer type compatible with enumerations */
3328 /*--------------------------------------------------------------------*/
3330 newEnumType (symbol *enumlist)
3338 type = newLink (SPECIFIER);
3339 SPEC_NOUN (type) = V_INT;
3343 /* Determine the range of the enumerated values */
3345 min = max = (int) floatFromVal (valFromType (sym->type));
3346 for (sym = sym->next; sym; sym = sym->next)
3348 v = (int) floatFromVal (valFromType (sym->type));
3355 /* Determine the smallest integer type that is compatible with this range */
3356 type = newLink (SPECIFIER);
3357 if (min>=0 && max<=255)
3359 SPEC_NOUN (type) = V_CHAR;
3360 SPEC_USIGN (type) = 1;
3362 else if (min>=-128 && max<=127)
3364 SPEC_NOUN (type) = V_CHAR;
3366 else if (min>=0 && max<=65535)
3368 SPEC_NOUN (type) = V_INT;
3369 SPEC_USIGN (type) = 1;
3371 else if (min>=-32768 && max<=32767)
3373 SPEC_NOUN (type) = V_INT;
3377 SPEC_NOUN (type) = V_INT;
3378 SPEC_LONG (type) = 1;
3380 SPEC_USIGN (type) = 1;