1 /*-------------------------------------------------------------------------
3 SDCCicode.c - intermediate code generation etc.
4 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 In other words, you are welcome to use, share and improve this program.
21 You are forbidden to forbid anyone else to use, share and improve
22 what you give them. Help stamp out software-hoarding!
23 -------------------------------------------------------------------------*/
27 /*-----------------------------------------------------------------*/
28 /* global variables */
30 set *iCodeChain = NULL ;
43 symbol *returnLabel ; /* function return label */
44 symbol *entryLabel ; /* function entry label */
45 /*-----------------------------------------------------------------*/
46 /* forward definition of some functions */
47 operand *geniCodeDivision (operand *,operand *);
48 operand *geniCodeAssign (operand *,operand *,int);
49 operand *geniCodeArray (operand *,operand *);
50 operand *geniCodeArray2Ptr (operand *);
51 operand *geniCodeRValue (operand *, bool );
52 operand *geniCodeDerefPtr (operand *);
54 #define PRINTFUNC(x) void x (FILE *of, iCode *ic, char *s)
55 /* forward definition of print functions */
56 PRINTFUNC(picGetValueAtAddr);
57 PRINTFUNC(picSetValueAtAddr);
59 PRINTFUNC(picGeneric);
60 PRINTFUNC(picGenericOne);
66 PRINTFUNC(picJumpTable);
68 PRINTFUNC(picReceive);
70 iCodeTable codeTable[] = {
71 { '!' , "not", picGenericOne , NULL },
72 { '~' , "~" , picGenericOne , NULL },
73 { RRC , "rrc", picGenericOne , NULL },
74 { RLC , "rlc", picGenericOne , NULL },
75 { GETHBIT ,"ghbit", picGenericOne , NULL },
76 { UNARYMINUS , "-" , picGenericOne , NULL },
77 { IPUSH , "push",picGenericOne , NULL },
78 { IPOP , "pop", picGenericOne , NULL },
79 { CALL , "call",picGenericOne , NULL },
80 { PCALL , "pcall",picGenericOne , NULL },
81 { FUNCTION , "proc", picGenericOne , NULL },
82 { ENDFUNCTION ,"eproc", picGenericOne , NULL },
83 { RETURN , "ret", picGenericOne , NULL },
84 { '+' , "+" , picGeneric , NULL },
85 { '-' , "-" , picGeneric , NULL },
86 { '*' , "*" , picGeneric , NULL },
87 { '/' , "/" , picGeneric , NULL },
88 { '%' , "%" , picGeneric , NULL },
89 { '>' , ">" , picGeneric , NULL },
90 { '<' , "<" , picGeneric , NULL },
91 { LE_OP , "<=" , picGeneric , NULL },
92 { GE_OP , ">=" , picGeneric , NULL },
93 { EQ_OP , "==" , picGeneric , NULL },
94 { NE_OP , "!=" , picGeneric , NULL },
95 { AND_OP , "&&" , picGeneric , NULL },
96 { OR_OP , "||" , picGeneric , NULL },
97 { '^' , "^" , picGeneric , NULL },
98 { '|' , "|" , picGeneric , NULL },
99 { BITWISEAND , "&" , picGeneric , NULL },
100 { LEFT_OP , "<<" , picGeneric , NULL },
101 { RIGHT_OP , ">>" , picGeneric , NULL },
102 { GET_VALUE_AT_ADDRESS, "@" , picGetValueAtAddr, NULL },
103 { ADDRESS_OF , "&" , picAddrOf , NULL },
104 { CAST , "<>" , picCast , NULL },
105 { '=' , ":=" , picAssign , NULL },
106 { LABEL , "" , picLabel , NULL },
107 { GOTO , "" , picGoto , NULL },
108 { JUMPTABLE ,"jtab" , picJumpTable , NULL },
109 { IFX , "if" , picIfx , NULL },
110 { INLINEASM , "" , picInline , NULL },
111 { RECEIVE , "recv", picReceive , NULL },
112 { SEND , "send", picGenericOne , NULL }
116 /*-----------------------------------------------------------------*/
117 /* operandName - returns the name of the operand */
118 /*-----------------------------------------------------------------*/
119 int printOperand (operand *op, FILE *file)
134 opetype = getSpec (operandType(op));
135 if (SPEC_NOUN(opetype) == V_FLOAT)
136 fprintf (file,"%g {", SPEC_CVAL(opetype).v_float);
138 fprintf (file,"0x%x {",(int) floatFromVal(op->operand.valOperand));
139 printTypeChain(operandType(op),file);
146 fprintf (file,"%s [k%d lr%d:%d so:%d]{ ia%d re%d rm%d}",/*{ar%d rm%d ru%d p%d a%d u%d i%d au%d k%d ks%d}" ,*/
147 (OP_SYMBOL(op)->rname[0] ? OP_SYMBOL(op)->rname : OP_SYMBOL(op)->name),
149 OP_LIVEFROM(op),OP_LIVETO(op),
150 OP_SYMBOL(op)->stack,
151 op->isaddr, OP_SYMBOL(op)->isreqv,OP_SYMBOL(op)->remat
154 fprintf(file,"{"); printTypeChain(operandType(op),file);
155 if (SPIL_LOC(op) && IS_ITEMP(op))
156 fprintf(file,"}{ sir@ %s",SPIL_LOC(op)->rname);
161 /* if assigned to registers */
162 if (OP_SYMBOL(op)->nRegs) {
163 if (OP_SYMBOL(op)->isspilt) {
164 if (!OP_SYMBOL(op)->remat)
165 if (OP_SYMBOL(op)->usl.spillLoc)
166 fprintf(file,"[%s]",(OP_SYMBOL(op)->usl.spillLoc->rname[0] ?
167 OP_SYMBOL(op)->usl.spillLoc->rname :
168 OP_SYMBOL(op)->usl.spillLoc->name));
170 fprintf(file,"[err]");
172 fprintf(file,"[remat]");
177 for(i=0;i<OP_SYMBOL(op)->nRegs;i++)
178 fprintf(file,"%s ", port->getRegName(OP_SYMBOL(op)->regs[i]));
183 fprintf(file,"%s",(OP_SYMBOL(op)->rname[0] ?
184 OP_SYMBOL(op)->rname : OP_SYMBOL(op)->name));
185 /* if assigned to registers */
186 if (OP_SYMBOL(op)->nRegs && !OP_SYMBOL(op)->isspilt) {
189 for(i=0;i<OP_SYMBOL(op)->nRegs;i++)
190 fprintf(file,"%s ",(OP_SYMBOL(op)->regs[i] ?
191 OP_SYMBOL(op)->regs[i]->name :
200 printTypeChain(op->operand.typeOperand,file);
211 /*-----------------------------------------------------------------*/
212 /* print functions */
213 /*-----------------------------------------------------------------*/
214 PRINTFUNC(picGetValueAtAddr)
217 printOperand (IC_RESULT(ic),of);
220 printOperand (IC_LEFT(ic), of);
226 PRINTFUNC(picSetValueAtAddr)
230 printOperand(IC_LEFT(ic),of);
232 printOperand(IC_RIGHT(ic),of);
239 printOperand(IC_RESULT(ic),of);
240 if (IS_ITEMP(IC_LEFT(ic)))
244 printOperand(IC_LEFT(ic),of);
246 if (IS_ITEMP(IC_LEFT(ic)))
247 fprintf(of," offsetAdd ");
250 printOperand(IC_RIGHT(ic),of);
252 if (IS_ITEMP(IC_LEFT(ic)))
258 PRINTFUNC(picJumpTable)
263 fprintf(of,"%s\t",s);
264 printOperand(IC_JTCOND(ic),of);
266 for ( sym = setFirstItem(IC_JTLABELS(ic)); sym;
267 sym = setNextItem(IC_JTLABELS(ic)))
268 fprintf(of,"\t\t\t%s\n",sym->name);
271 PRINTFUNC(picGeneric)
274 printOperand(IC_RESULT(ic),of);
276 printOperand(IC_LEFT(ic),of);
277 fprintf(of," %s ",s);
278 printOperand(IC_RIGHT(ic),of);
282 PRINTFUNC(picGenericOne)
285 if ( IC_RESULT(ic) ) {
286 printOperand(IC_RESULT(ic),of);
291 fprintf (of,"%s ",s);
292 printOperand(IC_LEFT(ic),of);
295 if (! IC_RESULT(ic) && !IC_LEFT(ic))
304 printOperand(IC_RESULT(ic),of);
306 printOperand(IC_LEFT(ic),of);
307 printOperand(IC_RIGHT(ic),of);
316 if (IC_RESULT(ic)->isaddr && IS_ITEMP(IC_RESULT(ic)))
319 printOperand(IC_RESULT(ic),of);
321 if (IC_RESULT(ic)->isaddr && IS_ITEMP(IC_RESULT(ic)))
324 fprintf(of," %s ", s);
325 printOperand (IC_RIGHT(ic),of);
332 fprintf(of," %s($%d) :\n",IC_LABEL(ic)->name,IC_LABEL(ic)->key);
338 fprintf (of," goto %s($%d)\n", IC_LABEL(ic)->name,IC_LABEL(ic)->key);
345 printOperand(IC_COND(ic),of);
348 fprintf (of," == 0 goto %s($%d)\n",IC_FALSE(ic)->name,IC_FALSE(ic)->key);
350 fprintf (of," != 0 goto %s($%d)\n",IC_TRUE(ic)->name,IC_TRUE(ic)->key);
352 fprintf (of,"\tzzgoto %s\n",IC_FALSE(ic)->name);
358 fprintf(of,"%s",IC_INLINE(ic));
361 PRINTFUNC(picReceive)
363 printOperand(IC_RESULT(ic),of);
364 fprintf(of," = %s ",s);
365 printOperand(IC_LEFT(ic),of);
369 /*-----------------------------------------------------------------*/
370 /* piCode - prints one iCode */
371 /*-----------------------------------------------------------------*/
372 int piCode (void *item, FILE *of)
380 icTab = getTableEntry(ic->op) ;
381 fprintf(stdout,"%s(%d:%d:%d:%d:%d)\t",
382 ic->filename,ic->lineno,
383 ic->seq,ic->key,ic->depth,ic->supportRtn);
384 icTab->iCodePrint(of,ic,icTab->printName);
388 /*-----------------------------------------------------------------*/
389 /* printiCChain - prints intermediate code for humans */
390 /*-----------------------------------------------------------------*/
391 void printiCChain (iCode *icChain, FILE *of)
398 for ( loop = icChain ; loop ; loop = loop->next ) {
399 if ((icTab = getTableEntry (loop->op ))) {
400 fprintf(of,"%s(%d:%d:%d:%d:%d)\t",
401 loop->filename,loop->lineno,
402 loop->seq,loop->key,loop->depth,loop->supportRtn);
404 icTab->iCodePrint (of,loop,icTab->printName);
410 /*-----------------------------------------------------------------*/
411 /* newOperand - allocate, init & return a new iCode */
412 /*-----------------------------------------------------------------*/
413 operand *newOperand ()
417 ALLOC(op,sizeof(operand));
423 /*-----------------------------------------------------------------*/
424 /* newiCode - create and return a new iCode entry initialised */
425 /*-----------------------------------------------------------------*/
426 iCode *newiCode (int op, operand *left, operand *right)
430 ALLOC(ic,sizeof(iCode));
432 ic->lineno = lineno ;
433 ic->filename= filename ;
435 ic->level = scopeLevel;
437 ic->key= iCodeKey++ ;
444 /*-----------------------------------------------------------------*/
445 /* newiCode for conditional statements */
446 /*-----------------------------------------------------------------*/
447 iCode *newiCodeCondition (operand *condition,
453 ic = newiCode(IFX,NULL,NULL);
454 IC_COND(ic) = condition ;
455 IC_TRUE(ic) = trueLabel ;
456 IC_FALSE(ic) = falseLabel;
460 /*-----------------------------------------------------------------*/
461 /* newiCodeLabelGoto - unconditional goto statement| label stmnt */
462 /*-----------------------------------------------------------------*/
463 iCode *newiCodeLabelGoto (int op, symbol *label)
467 ic = newiCode(op,NULL,NULL);
469 ic->argLabel.label = label ;
471 IC_RIGHT(ic) = NULL ;
472 IC_RESULT(ic) = NULL ;
476 /*-----------------------------------------------------------------*/
477 /* newiTemp - allocate & return a newItemp Variable */
478 /*-----------------------------------------------------------------*/
479 symbol *newiTemp (char *s)
484 sprintf(buffer,"%s",s);
486 sprintf (buffer,"iTemp%d",iTempNum++);
487 itmp = newSymbol (buffer,1);
488 strcpy(itmp->rname,itmp->name);
494 /*-----------------------------------------------------------------*/
495 /* newiTempLabel - creates a temp variable label */
496 /*-----------------------------------------------------------------*/
497 symbol *newiTempLabel (char *s)
501 /* check if this alredy exists */
502 if (s && (itmplbl = findSym(LabelTab, NULL, s)))
506 itmplbl = newSymbol(s,1);
508 sprintf(buffer,"iTempLbl%d",iTempLblNum++);
509 itmplbl = newSymbol(buffer,1);
514 itmplbl->key = labelKey++ ;
515 addSym (LabelTab, itmplbl, itmplbl->name,0,0);
519 /*-----------------------------------------------------------------*/
520 /* newiTempPreheaderLabel - creates a new preheader label */
521 /*-----------------------------------------------------------------*/
522 symbol *newiTempPreheaderLabel()
526 sprintf(buffer,"preHeaderLbl%d",iTempLblNum++);
527 itmplbl = newSymbol(buffer,1);
531 itmplbl->key = labelKey++ ;
532 addSym (LabelTab, itmplbl, itmplbl->name,0,0);
537 /*-----------------------------------------------------------------*/
538 /* initiCode - initialises some iCode related stuff */
539 /*-----------------------------------------------------------------*/
545 /*-----------------------------------------------------------------*/
546 /* copyiCode - make a copy of the iCode given */
547 /*-----------------------------------------------------------------*/
548 iCode *copyiCode (iCode *ic)
550 iCode *nic = newiCode(ic->op,NULL,NULL);
552 nic->lineno = ic->lineno ;
553 nic->filename= ic->filename ;
554 nic->block = ic->block;
555 nic->level = ic->level;
557 /* deal with the special cases first */
560 IC_COND(nic) = operandFromOperand(IC_COND(ic));
561 IC_TRUE(nic) = IC_TRUE(ic);
562 IC_FALSE(nic)= IC_FALSE(ic);
566 IC_JTCOND(nic) = operandFromOperand(IC_JTCOND(ic));
567 IC_JTLABELS(nic) = IC_JTLABELS(ic);
572 IC_RESULT(nic) = operandFromOperand(IC_RESULT(ic));
573 IC_LEFT(nic) = operandFromOperand(IC_LEFT(ic));
574 IC_ARGS(nic) = IC_ARGS(ic);
578 IC_INLINE(nic) = IC_INLINE(ic);
582 IC_RESULT(nic) = operandFromOperand(IC_RESULT(ic));
583 IC_LEFT(nic) = operandFromOperand(IC_LEFT(ic));
584 IC_RIGHT(nic)= operandFromOperand(IC_RIGHT(ic));
590 /*-----------------------------------------------------------------*/
591 /* getTableEntry - gets the table entry for the given operator */
592 /*-----------------------------------------------------------------*/
593 iCodeTable *getTableEntry (int oper )
597 for ( i = 0 ; i < (sizeof(codeTable)/sizeof(iCodeTable)); i++ )
598 if (oper == codeTable[i].icode)
599 return &codeTable[i] ;
604 /*-----------------------------------------------------------------*/
605 /* newiTempOperand - new intermediate temp operand */
606 /*-----------------------------------------------------------------*/
607 operand *newiTempOperand (link *type, char throwType)
610 operand *op = newOperand();
614 itmp = newiTemp(NULL);
616 etype = getSpec(type);
618 if (IS_LITERAL(etype) )
621 /* copy the type information */
623 itmp->etype = getSpec (itmp->type = (throwType ? type :
624 copyLinkChain(type)));
625 if (IS_LITERAL(itmp->etype)) {
626 SPEC_SCLS(itmp->etype) = S_REGISTER ;
627 SPEC_OCLS(itmp->etype) = reg;
630 op->operand.symOperand = itmp;
631 op->key = itmp->key = ++operandKey ;
635 /*-----------------------------------------------------------------*/
636 /* operandType - returns the type chain for an operand */
637 /*-----------------------------------------------------------------*/
638 link *operandType (operand *op)
640 /* depending on type of operand */
644 return op->operand.valOperand->type ;
647 return op->operand.symOperand->type ;
650 return op->operand.typeOperand ;
652 werror (E_INTERNAL_ERROR,__FILE__,__LINE__,
653 " operand type not known ");
654 assert (0) ; /* should never come here */
655 /* Just to keep the compiler happy */
660 /*-----------------------------------------------------------------*/
661 /* isParamterToCall - will return 1 if op is a parameter to args */
662 /*-----------------------------------------------------------------*/
663 int isParameterToCall (value *args, operand *op)
669 isSymbolEqual(op->operand.symOperand,tval->sym))
676 /*-----------------------------------------------------------------*/
677 /* isOperandGlobal - return 1 if operand is a global variable */
678 /*-----------------------------------------------------------------*/
679 int isOperandGlobal ( operand *op )
687 if (op->type == SYMBOL &&
688 (op->operand.symOperand->level == 0 ||
689 IS_STATIC(op->operand.symOperand->etype) ||
690 IS_EXTERN(op->operand.symOperand->etype))
697 /*-----------------------------------------------------------------*/
698 /* isOperandVolatile - return 1 if the operand is volatile */
699 /*-----------------------------------------------------------------*/
700 int isOperandVolatile ( operand *op , bool chkTemp)
705 if (IS_ITEMP(op) && !chkTemp)
708 opetype = getSpec(optype = operandType(op));
710 if (IS_PTR(optype) && DCL_PTR_VOLATILE(optype))
713 if (IS_VOLATILE(opetype))
718 /*-----------------------------------------------------------------*/
719 /* isOperandLiteral - returns 1 if an operand contains a literal */
720 /*-----------------------------------------------------------------*/
721 int isOperandLiteral ( operand *op )
728 opetype = getSpec (operandType(op));
730 if (IS_LITERAL(opetype))
735 /*-----------------------------------------------------------------*/
736 /* isOperandInFarSpace - will return true if operand is in farSpace*/
737 /*-----------------------------------------------------------------*/
738 bool isOperandInFarSpace (operand *op)
748 if (!IS_TRUE_SYMOP(op)) {
750 etype = SPIL_LOC(op)->etype;
755 etype = getSpec(operandType(op));
756 return (IN_FARSPACE(SPEC_OCLS(etype)) ? TRUE : FALSE);
759 /*-----------------------------------------------------------------*/
760 /* operandLitValue - literal value of an operand */
761 /*-----------------------------------------------------------------*/
762 double operandLitValue ( operand *op )
764 assert(isOperandLiteral(op));
766 return floatFromVal(op->operand.valOperand);
769 /*-----------------------------------------------------------------*/
770 /* operandOperation - perforoms operations on operands */
771 /*-----------------------------------------------------------------*/
772 operand *operandOperation (operand *left,operand *right,
775 operand *retval = (operand *)0;
777 assert(isOperandLiteral(left));
779 assert(isOperandLiteral(right));
783 retval = operandFromValue (valCastLiteral(type,
784 operandLitValue(left) +
785 operandLitValue(right)));
788 retval = operandFromValue(valCastLiteral(type,
789 operandLitValue(left) -
790 operandLitValue(right)));
793 retval = operandFromValue(valCastLiteral(type,
794 operandLitValue(left) *
795 operandLitValue(right)));
798 if ((unsigned long) operandLitValue(right) == 0){
799 werror(E_DIVIDE_BY_ZERO);
804 retval = operandFromValue (valCastLiteral(type,
805 operandLitValue(left) /
806 operandLitValue(right)));
809 if ((unsigned long) operandLitValue(right) == 0){
810 werror(E_DIVIDE_BY_ZERO);
814 retval = operandFromLit ((unsigned long) operandLitValue(left) %
815 (unsigned long) operandLitValue(right));
818 retval = operandFromLit ((unsigned long) operandLitValue(left) <<
819 (unsigned long) operandLitValue(right));
822 retval = operandFromLit ((unsigned long) operandLitValue(left) >>
823 (unsigned long) operandLitValue(right));
826 retval = operandFromLit (operandLitValue(left) ==
827 operandLitValue(right));
830 retval = operandFromLit (operandLitValue(left) <
831 operandLitValue(right));
834 retval = operandFromLit (operandLitValue(left) <=
835 operandLitValue(right));
838 retval = operandFromLit (operandLitValue(left) !=
839 operandLitValue(right));
842 retval = operandFromLit (operandLitValue(left) >
843 operandLitValue(right));
846 retval = operandFromLit (operandLitValue(left) >=
847 operandLitValue(right));
850 retval = operandFromLit ((unsigned long) operandLitValue(left) &
851 (unsigned long) operandLitValue(right));
854 retval = operandFromLit ((unsigned long) operandLitValue(left) |
855 (unsigned long) operandLitValue(right));
858 retval = operandFromLit ((unsigned long) operandLitValue(left) ^
859 (unsigned long) operandLitValue(right));
862 retval = operandFromLit (operandLitValue(left) &&
863 operandLitValue(right));
866 retval = operandFromLit (operandLitValue(left) ||
867 operandLitValue(right));
871 long i = operandLitValue(left);
873 retval = operandFromLit ((i >> (getSize(operandType(left))*8 - 1)) |
879 long i = operandLitValue(left);
881 retval = operandFromLit ((i << (getSize(operandType(left))*8 - 1)) |
887 retval = operandFromLit(-1 * operandLitValue(left));
891 retval = operandFromLit(~ ((long) operandLitValue(left)));
895 retval = operandFromLit(! operandLitValue(left));
899 werror(E_INTERNAL_ERROR,__FILE__,__LINE__,
900 " operandOperation invalid operator ");
908 /*-----------------------------------------------------------------*/
909 /* isOperandEqual - compares two operand & return 1 if they r = */
910 /*-----------------------------------------------------------------*/
911 int isOperandEqual (operand *left, operand *right)
913 /* if the pointers are equal then they are equal */
917 /* if either of them null then false */
918 if ( !left || !right)
921 if (left->type != right->type)
924 if (IS_SYMOP(left) && IS_SYMOP(right))
925 return left->key == right->key ;
927 /* if types are the same */
928 switch (left->type) {
930 return isSymbolEqual(left->operand.symOperand,
931 right->operand.symOperand);
933 return (floatFromVal(left->operand.valOperand) ==
934 floatFromVal(right->operand.valOperand));
936 if (checkType(left->operand.typeOperand,
937 right->operand.typeOperand) == 1)
944 /*-----------------------------------------------------------------*/
945 /* isiCodeEqual - comapres two iCodes are returns true if yes */
946 /*-----------------------------------------------------------------*/
947 int isiCodeEqual (iCode *left, iCode *right)
949 /* if the same pointer */
953 /* if either of them null */
957 /* if operand are the same */
958 if ( left->op == right->op ) {
960 /* compare all the elements depending on type */
961 if (left->op != IFX ) {
962 if (!isOperandEqual(IC_LEFT(left),IC_LEFT(right)))
964 if (!isOperandEqual(IC_RIGHT(left),IC_RIGHT(right)))
968 if (!isOperandEqual(IC_COND(left),IC_COND(right)))
970 if (!isSymbolEqual (IC_TRUE(left),IC_TRUE(right)))
972 if (!isSymbolEqual(IC_FALSE(left),IC_FALSE(right)))
980 /*-----------------------------------------------------------------*/
981 /* newiTempFromOp - create a temp Operand with same attributes */
982 /*-----------------------------------------------------------------*/
983 operand *newiTempFromOp (operand *op)
993 nop = newiTempOperand(operandType(op),TRUE);
994 nop->isaddr = op->isaddr ;
995 nop->isvolatile = op->isvolatile ;
996 nop->isGlobal = op->isGlobal ;
997 nop->isLiteral= op->isLiteral ;
998 nop->noSpilLoc= op->noSpilLoc;
999 nop->usesDefs = op->usesDefs;
1000 nop->isParm = op->isParm;
1001 nop->parmBytes = op->parmBytes;
1005 /*-----------------------------------------------------------------*/
1006 /* operand from operand - creates an operand holder for the type */
1007 /*-----------------------------------------------------------------*/
1008 operand *operandFromOperand (operand *op)
1015 nop->type = op->type;
1016 nop->isaddr = op->isaddr ;
1017 nop->key = op->key ;
1018 nop->isvolatile = op->isvolatile ;
1019 nop->isGlobal = op->isGlobal ;
1020 nop->isLiteral= op->isLiteral ;
1021 nop->noSpilLoc= op->noSpilLoc;
1022 nop->usesDefs = op->usesDefs;
1023 nop->isParm = op->isParm;
1024 nop->parmBytes = op->parmBytes;
1026 switch (nop->type) {
1028 nop->operand.symOperand = op->operand.symOperand ;
1031 nop->operand.valOperand = op->operand.valOperand;
1034 nop->operand.typeOperand = op->operand.typeOperand ;
1041 /*-----------------------------------------------------------------*/
1042 /* opFromOpWithDU - makes a copy of the operand and DU chains */
1043 /*-----------------------------------------------------------------*/
1044 operand *opFromOpWithDU (operand *op, bitVect *defs, bitVect *uses)
1046 operand *nop = operandFromOperand(op);
1048 if (nop->type == SYMBOL) {
1049 OP_SYMBOL(nop)->defs = bitVectCopy(defs);
1050 OP_SYMBOL(nop)->uses = bitVectCopy(uses);
1056 /*-----------------------------------------------------------------*/
1057 /* operandFromSymbol - creates an operand from a symbol */
1058 /*-----------------------------------------------------------------*/
1059 operand *operandFromSymbol (symbol *sym)
1064 /* if the symbol's type is a literal */
1065 /* then it is an enumerator type */
1066 if (IS_LITERAL(sym->etype) && SPEC_ENUM(sym->etype))
1067 return operandFromValue (valFromType(sym->etype));
1070 sym->key = ++operandKey ;
1072 /* if this an implicit variable, means struct/union */
1073 /* member so just return it */
1074 if (sym->implicit || IS_FUNC(sym->type)) {
1077 op->operand.symOperand = sym;
1078 op->key = sym->key ;
1079 op->isvolatile = isOperandVolatile(op,TRUE);
1080 op->isGlobal = isOperandGlobal(op);
1081 op->parmBytes = sym->argStack;
1085 /* under the following conditions create a
1086 register equivalent for a local symbol */
1087 if (sym->level && sym->etype && SPEC_OCLS(sym->etype) &&
1088 IN_FARSPACE(SPEC_OCLS(sym->etype)) &&
1089 options.stackAuto == 0)
1092 if (!IS_AGGREGATE(sym->type) && /* not an aggregate */
1093 !IS_FUNC(sym->type) && /* not a function */
1094 !sym->_isparm && /* not a parameter */
1095 sym->level && /* is a local variable */
1096 !sym->addrtaken && /* whose address has not been taken */
1097 !sym->reqv && /* does not already have a register euivalence */
1098 !IS_VOLATILE(sym->etype) && /* not declared as volatile */
1099 !IS_STATIC(sym->etype) && /* and not declared static */
1100 !sym->islbl && /* not a label */
1101 ok && /* farspace check */
1102 !IS_BITVAR(sym->etype) /* not a bit variable */
1105 /* we will use it after all optimizations
1106 and before liveRange calculation */
1107 sym->reqv = newiTempOperand(sym->type,0);
1108 sym->reqv->key = sym->key ;
1109 OP_SYMBOL(sym->reqv)->key = sym->key;
1110 OP_SYMBOL(sym->reqv)->isreqv = 1;
1111 OP_SYMBOL(sym->reqv)->islocal = 1;
1112 SPIL_LOC(sym->reqv) = sym;
1115 if (!IS_AGGREGATE(sym->type)) {
1118 op->operand.symOperand = sym;
1121 op->isvolatile = isOperandVolatile(op,TRUE);
1122 op->isGlobal = isOperandGlobal(op);
1123 op->isPtr = IS_PTR(operandType(op));
1124 op->isParm = sym->_isparm ;
1129 /* itemp = &[_symbol] */
1131 ic = newiCode(ADDRESS_OF,newOperand(),NULL);
1132 IC_LEFT(ic)->type = SYMBOL ;
1133 IC_LEFT(ic)->operand.symOperand = sym ;
1134 IC_LEFT(ic)->key = sym->key;
1135 (IC_LEFT(ic))->isvolatile = isOperandVolatile(IC_LEFT(ic),TRUE);
1136 (IC_LEFT(ic))->isGlobal = isOperandGlobal(IC_LEFT(ic));
1137 IC_LEFT(ic)->isPtr = IS_PTR(operandType(IC_LEFT(ic)));
1140 IC_RESULT(ic) = newiTempOperand(sym->type,0);
1141 if (IS_ARRAY(sym->type)) {
1142 IC_RESULT(ic) = geniCodeArray2Ptr (IC_RESULT(ic));
1143 IC_RESULT(ic)->isaddr = 0;
1145 IC_RESULT(ic)->isaddr = (!IS_AGGREGATE(sym->type));
1147 IC_RESULT(ic)->operand.symOperand->args = sym->args;
1151 return IC_RESULT(ic) ;
1154 /*-----------------------------------------------------------------*/
1155 /* operandFromValue - creates an operand from value */
1156 /*-----------------------------------------------------------------*/
1157 operand *operandFromValue (value *val)
1161 /* if this is a symbol then do the symbol thing */
1163 return operandFromSymbol (val->sym);
1165 /* this is not a symbol */
1168 op->operand.valOperand = val ;
1169 op->isLiteral = isOperandLiteral(op);
1173 /*-----------------------------------------------------------------*/
1174 /* operandFromLink - operand from typeChain */
1175 /*-----------------------------------------------------------------*/
1176 operand *operandFromLink (link *type)
1180 /* operand from link */
1186 op->operand.typeOperand = copyLinkChain(type);
1190 /*-----------------------------------------------------------------*/
1191 /* operandFromLit - makes an operand from a literal value */
1192 /*-----------------------------------------------------------------*/
1193 operand *operandFromLit ( float i)
1195 return operandFromValue (valueFromLit (i));
1198 /*-----------------------------------------------------------------*/
1199 /* operandFromAst - creates an operand from an ast */
1200 /*-----------------------------------------------------------------*/
1201 operand *operandFromAst ( ast *tree )
1207 /* depending on type do */
1208 switch (tree->type ) {
1210 return ast2iCode (tree) ;
1214 return operandFromValue(tree->opval.val) ;
1218 return operandFromLink (tree->opval.lnk) ;
1222 /* Just to keep the comiler happy */
1223 return (operand *)0;
1226 /*-----------------------------------------------------------------*/
1227 /* setOperandType - sets the operand's type to the given type */
1228 /*-----------------------------------------------------------------*/
1229 void setOperandType (operand *op, link *type)
1231 /* depending on the type of operand */
1235 op->operand.valOperand->etype =
1236 getSpec( op->operand.valOperand->type =
1237 copyLinkChain (type )) ;
1241 if (op->operand.symOperand->isitmp )
1242 op->operand.symOperand->etype =
1243 getSpec( op->operand.symOperand->type =
1244 copyLinkChain (type )) ;
1246 werror (E_INTERNAL_ERROR,__FILE__,__LINE__,
1247 "attempt to modify type of source");
1251 op->operand.typeOperand = copyLinkChain (type);
1257 /*-----------------------------------------------------------------*/
1258 /* geniCodeValueAtAddress - generate intermeditate code for value */
1260 /*-----------------------------------------------------------------*/
1261 operand *geniCodeRValue (operand *op, bool force)
1264 link *type = operandType(op);
1265 link *etype= getSpec(type);
1267 /* if this is an array & already */
1268 /* an address then return this */
1269 if (IS_AGGREGATE(type) ||
1270 (IS_PTR(type) && !force && !op->isaddr))
1271 return operandFromOperand(op);
1273 /* if this is not an address then must be */
1274 /* rvalue already so return this one */
1278 /* if this is not a temp symbol then */
1279 if (!IS_ITEMP(op) &&
1281 !IN_FARSPACE(SPEC_OCLS(etype))) {
1282 op = operandFromOperand(op);
1287 if (IS_SPEC(type) &&
1288 IS_TRUE_SYMOP(op) &&
1289 !IN_FARSPACE(SPEC_OCLS(etype))) {
1290 op = operandFromOperand(op);
1295 ic = newiCode(GET_VALUE_AT_ADDRESS,op,NULL);
1296 if (IS_PTR(type) && op->isaddr && force)
1299 type = copyLinkChain(type);
1301 IC_RESULT(ic) = newiTempOperand (type,1);
1302 IC_RESULT(ic)->isaddr = 0;
1304 /* ic->supportRtn = ((IS_GENPTR(type) | op->isGptr) & op->isaddr); */
1306 /* if the right is a symbol */
1307 if (op->type == SYMBOL)
1308 IC_RESULT(ic)->operand.symOperand->args =
1309 op->operand.symOperand->args ;
1312 return IC_RESULT(ic) ;
1315 /*-----------------------------------------------------------------*/
1316 /* geniCodeCast - changes the value from one type to another */
1317 /*-----------------------------------------------------------------*/
1318 operand *geniCodeCast (link *type, operand *op, bool implicit)
1322 link *opetype = getSpec(optype = operandType(op));
1325 /* one of them has size zero then error */
1326 if (IS_VOID(optype)) {
1327 werror(E_CAST_ZERO);
1331 /* if the operand is already the desired type then do nothing */
1332 if ( checkType (type,optype) == 1)
1335 /* if this is a literal then just change the type & return */
1336 if (IS_LITERAL(opetype) && op->type == VALUE && !IS_PTR(type) && !IS_PTR(optype))
1337 return operandFromValue(valCastLiteral(type,
1338 operandLitValue(op)));
1340 /* if casting to some pointer type &&
1341 the destination is not a generic pointer
1342 then give a warning : (only for implicit casts)*/
1343 if (IS_PTR(optype) && implicit &&
1344 (DCL_TYPE(optype) != DCL_TYPE(type)) &&
1346 werror(E_INCOMPAT_CAST);
1347 werror(E_CONTINUE,"from type '");
1348 printTypeChain(optype,stderr);fprintf(stderr,"' to type '");
1349 printTypeChain(type,stderr);fprintf(stderr,"'\n");
1352 /* if they are the same size create an assignment */
1353 if (getSize(type) == getSize(optype) &&
1354 !IS_BITFIELD(type) &&
1356 !IS_FLOAT(optype) &&
1357 ((IS_SPEC(type) && IS_SPEC(optype)) ||
1358 (!IS_SPEC(type) && !IS_SPEC(optype)))) {
1360 ic = newiCode('=',NULL,op);
1361 IC_RESULT(ic) = newiTempOperand(type,0);
1362 SPIL_LOC(IC_RESULT(ic)) =
1363 (IS_TRUE_SYMOP(op) ? OP_SYMBOL(op) : NULL);
1364 IC_RESULT(ic)->isaddr = 0;
1366 ic = newiCode(CAST,operandFromLink(type),
1367 geniCodeRValue(op,FALSE));
1369 IC_RESULT(ic)= newiTempOperand(type,0);
1372 /* preserve the storage class & output class */
1373 /* of the original variable */
1374 restype = getSpec(operandType(IC_RESULT(ic)));
1375 SPEC_SCLS(restype) = SPEC_SCLS(opetype);
1376 SPEC_OCLS(restype) = SPEC_OCLS(opetype);
1379 return IC_RESULT(ic) ;
1382 /*-----------------------------------------------------------------*/
1383 /* geniCodeLabel - will create a Label */
1384 /*-----------------------------------------------------------------*/
1385 void geniCodeLabel (symbol *label)
1389 ic = newiCodeLabelGoto(LABEL,label);
1393 /*-----------------------------------------------------------------*/
1394 /* geniCodeGoto - will create a Goto */
1395 /*-----------------------------------------------------------------*/
1396 void geniCodeGoto (symbol *label)
1400 ic = newiCodeLabelGoto(GOTO,label);
1404 /*-----------------------------------------------------------------*/
1405 /* geniCodeMultiply - gen intermediate code for multiplication */
1406 /*-----------------------------------------------------------------*/
1407 operand *geniCodeMultiply (operand *left, operand *right)
1414 /* if they are both literal then we know the result */
1415 if (IS_LITERAL(letype) && IS_LITERAL(retype))
1416 return operandFromValue (valMult(left->operand.valOperand,
1417 right->operand.valOperand));
1419 resType = computeType (ltype,rtype) ;
1420 left = geniCodeCast(resType,left,TRUE);
1421 right= geniCodeCast(resType,right,TRUE);
1423 /* if the right is a literal & power of 2 */
1424 /* then make it a left shift */
1425 if (IS_LITERAL(retype) && !IS_FLOAT(letype) &&
1426 (p2 = powof2 ((unsigned long)floatFromVal(right->operand.valOperand))))
1427 ic = newiCode(LEFT_OP, left,operandFromLit(p2)); /* left shift */
1429 ic = newiCode('*',left,right); /* normal multiplication */
1430 /* if the size left or right > 1 then support routine */
1431 if (getSize(ltype) > 1 || getSize(rtype) > 1)
1435 IC_RESULT(ic) = newiTempOperand(resType,1);
1438 return IC_RESULT(ic) ;
1441 /*-----------------------------------------------------------------*/
1442 /* geniCodeDivision - gen intermediate code for division */
1443 /*-----------------------------------------------------------------*/
1444 operand *geniCodeDivision (operand *left, operand *right)
1449 link *rtype = operandType(right);
1450 link *retype= getSpec(rtype);
1451 link *ltype = operandType(left);
1452 link *letype= getSpec(ltype);
1454 resType = computeType (ltype,rtype) ;
1455 left = geniCodeCast(resType,left,TRUE);
1456 right= geniCodeCast(resType,right,TRUE);
1458 /* if the right is a literal & power of 2 */
1459 /* then make it a right shift */
1460 if (IS_LITERAL(retype) &&
1461 !IS_FLOAT(letype) &&
1462 (p2 = powof2 ((unsigned long)
1463 floatFromVal(right->operand.valOperand))))
1464 ic = newiCode(RIGHT_OP, left,operandFromLit(p2)); /* right shift */
1466 ic = newiCode('/',left,right); /* normal division */
1467 /* if the size left or right > 1 then support routine */
1468 if (getSize(ltype) > 1 || getSize(rtype) > 1)
1471 IC_RESULT(ic) = newiTempOperand(resType,0);
1474 return IC_RESULT(ic) ;
1476 /*-----------------------------------------------------------------*/
1477 /* geniCodeModulus - gen intermediate code for modulus */
1478 /*-----------------------------------------------------------------*/
1479 operand *geniCodeModulus (operand *left, operand *right)
1485 /* if they are both literal then we know the result */
1486 if (IS_LITERAL(letype) && IS_LITERAL(retype))
1487 return operandFromValue (valMod(left->operand.valOperand,
1488 right->operand.valOperand));
1490 resType = computeType (ltype,rtype) ;
1491 left = geniCodeCast(resType,left,TRUE);
1492 right= geniCodeCast(resType,right,TRUE);
1494 /* now they are the same size */
1495 ic = newiCode('%',left,right);
1497 /* if the size left or right > 1 then support routine */
1498 if (getSize(ltype) > 1 || getSize(rtype) > 1)
1500 IC_RESULT(ic) = newiTempOperand(resType,0);
1503 return IC_RESULT(ic) ;
1506 /*-----------------------------------------------------------------*/
1507 /* geniCodePtrPtrSubtract - subtracts pointer from pointer */
1508 /*-----------------------------------------------------------------*/
1509 operand *geniCodePtrPtrSubtract (operand *left, operand *right)
1515 /* if they are both literals then */
1516 if (IS_LITERAL(letype) && IS_LITERAL(retype)) {
1517 result = operandFromValue (valMinus(left->operand.valOperand,
1518 right->operand.valOperand));
1522 ic = newiCode('-',left,right);
1524 IC_RESULT(ic) = result = newiTempOperand(newIntLink(),1);
1528 return geniCodeDivision (result,
1529 operandFromLit(getSize(ltype->next)));
1532 /*-----------------------------------------------------------------*/
1533 /* geniCodeSubtract - generates code for subtraction */
1534 /*-----------------------------------------------------------------*/
1535 operand *geniCodeSubtract (operand *left, operand *right)
1542 /* if they both pointers then */
1543 if ((IS_PTR(ltype) || IS_ARRAY(ltype)) &&
1544 (IS_PTR(rtype) || IS_ARRAY(rtype)))
1545 return geniCodePtrPtrSubtract (left,right);
1547 /* if they are both literal then we know the result */
1548 if (IS_LITERAL(letype) && IS_LITERAL(retype)
1549 && left->isLiteral && right->isLiteral)
1550 return operandFromValue (valMinus(left->operand.valOperand,
1551 right->operand.valOperand));
1553 /* if left is an array or pointer */
1554 if ( IS_PTR(ltype) || IS_ARRAY(ltype) ) {
1555 isarray = left->isaddr ;
1556 right = geniCodeMultiply (right,
1557 operandFromLit(getSize(ltype->next)));
1558 resType = copyLinkChain(IS_ARRAY(ltype) ? ltype->next : ltype);
1560 else { /* make them the same size */
1561 resType = computeType (ltype,rtype) ;
1562 left = geniCodeCast(resType,left,TRUE);
1563 right= geniCodeCast(resType,right,TRUE);
1566 ic = newiCode('-',left,right);
1568 IC_RESULT(ic)= newiTempOperand(resType,1);
1569 IC_RESULT(ic)->isaddr = (isarray ? 1 : 0);
1571 /* if left or right is a float */
1572 if (IS_FLOAT(ltype) || IS_FLOAT(rtype))
1576 return IC_RESULT(ic) ;
1579 /*-----------------------------------------------------------------*/
1580 /* geniCodeAdd - generates iCode for addition */
1581 /*-----------------------------------------------------------------*/
1582 operand *geniCodeAdd (operand *left, operand *right )
1590 /* if left is an array then array access */
1591 if (IS_ARRAY(ltype))
1592 return geniCodeArray (left,right);
1594 /* if the right side is LITERAL zero */
1595 /* return the left side */
1596 if (IS_LITERAL(retype) && right->isLiteral && !floatFromVal(valFromType(retype)))
1599 /* if left is literal zero return right */
1600 if (IS_LITERAL(letype) && left->isLiteral && !floatFromVal(valFromType(letype)))
1603 /* if left is an array or pointer then size */
1604 if (IS_PTR(ltype)) {
1606 isarray = left->isaddr;
1608 operandFromLit(getSize(ltype->next));
1609 right = geniCodeMultiply (right ,size);
1610 resType = copyLinkChain(ltype);
1612 else { /* make them the same size */
1613 resType = computeType (ltype,rtype) ;
1614 left = geniCodeCast(resType,left,TRUE);
1615 right= geniCodeCast(resType,right,TRUE);
1618 /* if they are both literals then we know */
1619 if (IS_LITERAL(letype) && IS_LITERAL(retype)
1620 && left->isLiteral && right->isLiteral)
1621 return operandFromValue (valPlus(valFromType(letype),
1622 valFromType(retype)));
1624 ic = newiCode('+',left,right);
1626 IC_RESULT(ic) = newiTempOperand(resType,1);
1627 IC_RESULT(ic)->isaddr = ( isarray ? 1 : 0);
1629 /* if left or right is a float then support
1631 if (IS_FLOAT(ltype) || IS_FLOAT(rtype))
1636 return IC_RESULT(ic) ;
1640 /*-----------------------------------------------------------------*/
1641 /* aggrToPtr - changes an aggregate to pointer to an aggregate */
1642 /*-----------------------------------------------------------------*/
1643 link *aggrToPtr ( link *type, bool force)
1649 if (IS_PTR(type) && !force)
1652 etype = getSpec(type);
1656 /* if the output class is generic */
1657 if ((DCL_TYPE(ptype) = PTR_TYPE(SPEC_OCLS(etype))) == CPOINTER)
1658 DCL_PTR_CONST(ptype) = port->mem.code_ro;
1660 /* if the variable was declared a constant */
1661 /* then the pointer points to a constant */
1662 if (IS_CONSTANT(etype) )
1663 DCL_PTR_CONST(ptype) = 1;
1665 /* the variable was volatile then pointer to volatile */
1666 if (IS_VOLATILE(etype))
1667 DCL_PTR_VOLATILE(ptype) = 1;
1671 /*-----------------------------------------------------------------*/
1672 /* geniCodeArray2Ptr - array to pointer */
1673 /*-----------------------------------------------------------------*/
1674 operand *geniCodeArray2Ptr (operand *op)
1676 link *optype = operandType(op);
1677 link *opetype = getSpec(optype);
1679 /* set the pointer depending on the storage class */
1680 if ((DCL_TYPE(optype) = PTR_TYPE(SPEC_OCLS(opetype))) == CPOINTER)
1681 DCL_PTR_CONST(optype) = port->mem.code_ro;
1684 /* if the variable was declared a constant */
1685 /* then the pointer points to a constant */
1686 if (IS_CONSTANT(opetype) )
1687 DCL_PTR_CONST(optype) = 1;
1689 /* the variable was volatile then pointer to volatile */
1690 if (IS_VOLATILE(opetype))
1691 DCL_PTR_VOLATILE(optype) = 1;
1696 /*-----------------------------------------------------------------*/
1697 /* geniCodeArray - array access */
1698 /*-----------------------------------------------------------------*/
1699 operand *geniCodeArray (operand *left,operand *right)
1702 link *ltype = operandType(left);
1704 if (IS_PTR(ltype)) {
1705 if (IS_PTR(ltype->next) && left->isaddr)
1706 left = geniCodeRValue(left,FALSE);
1707 return geniCodeDerefPtr(geniCodeAdd(left,right));
1711 right = geniCodeMultiply(right,
1712 operandFromLit(getSize(ltype->next)));
1714 /* we can check for limits here */
1715 if (isOperandLiteral(right) &&
1718 (operandLitValue(right)/getSize(ltype->next)) >= DCL_ELEM(ltype)) {
1719 werror(E_ARRAY_BOUND);
1720 right = operandFromLit(0);
1723 ic = newiCode('+',left,right);
1725 IC_RESULT(ic) = newiTempOperand(((IS_PTR(ltype) &&
1726 !IS_AGGREGATE(ltype->next) &&
1727 !IS_PTR(ltype->next))
1728 ? ltype : ltype->next),0);
1730 IC_RESULT(ic)->isaddr = (!IS_AGGREGATE(ltype->next));
1732 return IC_RESULT(ic) ;
1735 /*-----------------------------------------------------------------*/
1736 /* geniCodeStruct - generates intermediate code for structres */
1737 /*-----------------------------------------------------------------*/
1738 operand *geniCodeStruct (operand *left, operand *right, bool islval)
1741 link *type = operandType(left);
1742 link *etype = getSpec(type);
1744 symbol *element = getStructElement(SPEC_STRUCT(etype),
1745 right->operand.symOperand);
1747 /* add the offset */
1748 ic = newiCode('+',left,operandFromLit(element->offset));
1750 IC_RESULT(ic) = newiTempOperand(element->type,0);
1752 /* preserve the storage & output class of the struct */
1753 /* as well as the volatile attribute */
1754 retype = getSpec(operandType(IC_RESULT(ic)));
1755 SPEC_SCLS(retype) = SPEC_SCLS(etype);
1756 SPEC_OCLS(retype) = SPEC_OCLS(etype);
1757 SPEC_VOLATILE(retype) |= SPEC_VOLATILE(etype);
1759 if (IS_PTR(element->type))
1760 setOperandType(IC_RESULT(ic),aggrToPtr(operandType(IC_RESULT(ic)),TRUE));
1762 IC_RESULT(ic)->isaddr = (!IS_AGGREGATE(element->type));
1766 return (islval ? IC_RESULT(ic) : geniCodeRValue(IC_RESULT(ic),TRUE));
1769 /*-----------------------------------------------------------------*/
1770 /* geniCodePostInc - generate int code for Post increment */
1771 /*-----------------------------------------------------------------*/
1772 operand *geniCodePostInc (operand *op)
1776 link *optype = operandType(op);
1778 operand *rv = (IS_ITEMP(op) ?
1779 geniCodeRValue(op,(IS_PTR(optype) ? TRUE : FALSE)) :
1781 link *rvtype = operandType(rv);
1784 /* if this is not an address we have trouble */
1785 if ( ! op->isaddr ) {
1786 werror (E_LVALUE_REQUIRED,"++");
1790 rOp = newiTempOperand(rvtype,0);
1796 geniCodeAssign(rOp,rv,0);
1798 size = (IS_PTR(rvtype) ? getSize(rvtype->next) : 1);
1799 ic = newiCode('+',rv,operandFromLit(size));
1800 IC_RESULT(ic) = result =newiTempOperand(rvtype,0);
1803 geniCodeAssign(op,result,0);
1809 /*-----------------------------------------------------------------*/
1810 /* geniCodePreInc - generate code for preIncrement */
1811 /*-----------------------------------------------------------------*/
1812 operand *geniCodePreInc (operand *op)
1815 link *optype = operandType(op);
1816 operand *rop = (IS_ITEMP(op) ?
1817 geniCodeRValue (op,(IS_PTR(optype) ? TRUE : FALSE)) :
1819 link *roptype = operandType(rop);
1823 if ( ! op->isaddr ) {
1824 werror(E_LVALUE_REQUIRED,"++");
1829 size = (IS_PTR(roptype) ? getSize(roptype->next) : 1);
1830 ic = newiCode('+',rop,operandFromLit(size));
1831 IC_RESULT(ic) = result = newiTempOperand(roptype,0) ;
1835 return geniCodeAssign(op,result,0) ;
1838 /*-----------------------------------------------------------------*/
1839 /* geniCodePostDec - generates code for Post decrement */
1840 /*-----------------------------------------------------------------*/
1841 operand *geniCodePostDec (operand *op)
1845 link *optype = operandType(op);
1847 operand *rv = (IS_ITEMP(op) ?
1848 geniCodeRValue(op,(IS_PTR(optype) ? TRUE : FALSE)) :
1850 link *rvtype = operandType(rv);
1853 /* if this is not an address we have trouble */
1854 if ( ! op->isaddr ) {
1855 werror (E_LVALUE_REQUIRED,"++");
1859 rOp = newiTempOperand(rvtype,0);
1865 geniCodeAssign(rOp,rv,0);
1867 size = (IS_PTR(rvtype) ? getSize(rvtype->next) : 1);
1868 ic = newiCode('-',rv,operandFromLit(size));
1869 IC_RESULT(ic) = result =newiTempOperand(rvtype,0);
1872 geniCodeAssign(op,result,0);
1878 /*-----------------------------------------------------------------*/
1879 /* geniCodePreDec - generate code for pre decrement */
1880 /*-----------------------------------------------------------------*/
1881 operand *geniCodePreDec (operand *op)
1884 link *optype = operandType(op);
1885 operand *rop = (IS_ITEMP(op) ?
1886 geniCodeRValue (op,(IS_PTR(optype) ? TRUE : FALSE)) :
1888 link *roptype = operandType(rop);
1892 if ( ! op->isaddr ) {
1893 werror(E_LVALUE_REQUIRED,"++");
1898 size = (IS_PTR(roptype) ? getSize(roptype->next) : 1);
1899 ic = newiCode('-',rop,operandFromLit(size));
1900 IC_RESULT(ic) = result = newiTempOperand(roptype,0) ;
1904 return geniCodeAssign(op,result,0) ;
1908 /*-----------------------------------------------------------------*/
1909 /* geniCodeBitwise - gen int code for bitWise operators */
1910 /*-----------------------------------------------------------------*/
1911 operand *geniCodeBitwise (operand *left, operand *right,
1912 int oper, link *resType)
1916 left = geniCodeCast(resType,left,TRUE);
1917 right= geniCodeCast(resType,right,TRUE);
1919 ic = newiCode(oper,left,right);
1920 IC_RESULT(ic) = newiTempOperand(resType,0);
1923 return IC_RESULT(ic) ;
1926 /*-----------------------------------------------------------------*/
1927 /* geniCodeAddressOf - gens icode for '&' address of operator */
1928 /*-----------------------------------------------------------------*/
1929 operand *geniCodeAddressOf (operand *op)
1933 link *optype = operandType(op);
1934 link *opetype= getSpec(optype);
1936 /* lvalue check already done in decorateType */
1937 /* this must be a lvalue */
1938 /* if (!op->isaddr && !IS_AGGREGATE(optype)) { */
1939 /* werror (E_LVALUE_REQUIRED,"&"); */
1944 p->class = DECLARATOR ;
1946 /* set the pointer depending on the storage class */
1947 if ((DCL_TYPE(p) = PTR_TYPE(SPEC_OCLS(opetype))) == CPOINTER)
1948 DCL_PTR_CONST(p) = port->mem.code_ro;
1950 /* make sure we preserve the const & volatile */
1951 if (IS_CONSTANT(opetype))
1952 DCL_PTR_CONST(p) = 1;
1954 if (IS_VOLATILE(opetype))
1955 DCL_PTR_VOLATILE(p) = 1;
1957 p->next = copyLinkChain(optype);
1959 /* if already a temp */
1961 setOperandType (op,p);
1966 /* other wise make this of the type coming in */
1967 ic = newiCode(ADDRESS_OF,op,NULL);
1968 IC_RESULT(ic) = newiTempOperand(p,1);
1969 IC_RESULT(ic)->isaddr = 0;
1971 return IC_RESULT(ic);
1973 /*-----------------------------------------------------------------*/
1974 /* setOClass - sets the output class depending on the pointer type */
1975 /*-----------------------------------------------------------------*/
1976 void setOClass (link *ptr, link *spec)
1978 switch (DCL_TYPE(ptr)) {
1980 SPEC_OCLS(spec) = data ;
1984 SPEC_OCLS(spec) = generic;
1988 SPEC_OCLS(spec) = xdata ;
1992 SPEC_OCLS(spec) = code ;
1996 SPEC_OCLS(spec) = idata;
2000 SPEC_OCLS(spec) = xstack;
2004 SPEC_OCLS(spec) = eeprom;
2013 /*-----------------------------------------------------------------*/
2014 /* geniCodeDerefPtr - dereference pointer with '*' */
2015 /*-----------------------------------------------------------------*/
2016 operand *geniCodeDerefPtr (operand *op)
2018 link *rtype , *retype ;
2019 link *optype = operandType(op);
2021 /* if this is a pointer then generate the rvalue */
2022 if (IS_PTR(optype)) {
2023 if (IS_TRUE_SYMOP(op)) {
2025 op = geniCodeRValue(op,TRUE);
2028 op = geniCodeRValue(op,TRUE);
2031 /* now get rid of the pointer part */
2032 if (lvaluereq && IS_ITEMP(op) )
2034 retype = getSpec(rtype = copyLinkChain(optype)) ;
2038 retype = getSpec(rtype = copyLinkChain(optype->next)) ;
2041 /* if this is a pointer then outputclass needs 2b updated */
2043 setOClass(optype,retype);
2045 op->isGptr = IS_GENPTR(optype);
2047 /* if the pointer was declared as a constant */
2048 /* then we cannot allow assignment to the derefed */
2049 if (IS_PTR_CONST(optype))
2050 SPEC_CONST(retype) = 1;
2052 op->isaddr = (IS_PTR(rtype) ||
2059 op = geniCodeRValue(op,TRUE);
2061 setOperandType(op,rtype);
2066 /*-----------------------------------------------------------------*/
2067 /* geniCodeUnaryMinus - does a unary minus of the operand */
2068 /*-----------------------------------------------------------------*/
2069 operand *geniCodeUnaryMinus (operand *op)
2072 link *optype = operandType(op);
2074 if (IS_LITERAL(optype))
2075 return operandFromLit(- floatFromVal(op->operand.valOperand));
2077 ic = newiCode(UNARYMINUS,op,NULL);
2078 IC_RESULT(ic) = newiTempOperand(optype,0);
2080 return IC_RESULT(ic);
2083 /*-----------------------------------------------------------------*/
2084 /* geniCodeLeftShift - gen i code for left shift */
2085 /*-----------------------------------------------------------------*/
2086 operand *geniCodeLeftShift (operand *left, operand *right)
2089 link *ltype = operandType(left);
2091 ic = newiCode(LEFT_OP,left,right);
2092 IC_RESULT(ic) = newiTempOperand(ltype,0);
2094 return IC_RESULT(ic) ;
2097 /*-----------------------------------------------------------------*/
2098 /* geniCodeRightShift - gen i code for right shift */
2099 /*-----------------------------------------------------------------*/
2100 operand *geniCodeRightShift (operand *left, operand *right)
2103 link *ltype = operandType(left);
2105 ic = newiCode(RIGHT_OP,left,right);
2106 IC_RESULT(ic) = newiTempOperand(ltype,0);
2108 return IC_RESULT(ic) ;
2112 #define LONG_LONG __int64
2114 #define LONG_LONG long long
2117 /*-----------------------------------------------------------------*/
2118 /* geniCodeLogic- logic code */
2119 /*-----------------------------------------------------------------*/
2120 operand *geniCodeLogic (operand *left, operand *right, int op )
2124 link *rtype = operandType(right);
2125 link *ltype = operandType(left);
2127 /* left is integral type and right is literal then
2128 check if the literal value is within bounds */
2129 if (IS_INTEGRAL(ltype) && IS_LITERAL(rtype)) {
2130 int nbits = bitsForType(ltype);
2131 long v = operandLitValue(right);
2133 if (v > ((LONG_LONG) 1 << nbits) && v > 0)
2134 werror(W_CONST_RANGE," compare operation ");
2137 ctype = computeType(ltype,rtype);
2138 left = geniCodeCast(ctype,left,TRUE);
2139 right= geniCodeCast(ctype,right,TRUE);
2141 ic = newiCode(op,left,right);
2142 IC_RESULT(ic) = newiTempOperand (newCharLink(),1);
2144 /* if comparing anything greater than one byte
2145 and not a '==' || '!=' || '&&' || '||' (these
2147 if (getSize(ctype) > 1 &&
2155 return IC_RESULT(ic);
2158 /*-----------------------------------------------------------------*/
2159 /* geniCodeUnary - for a a generic unary operation */
2160 /*-----------------------------------------------------------------*/
2161 operand *geniCodeUnary (operand *op, int oper )
2163 iCode *ic = newiCode (oper,op,NULL);
2165 IC_RESULT(ic)= newiTempOperand(operandType(op),0);
2167 return IC_RESULT(ic) ;
2170 /*-----------------------------------------------------------------*/
2171 /* geniCodeConditional - geniCode for '?' ':' operation */
2172 /*-----------------------------------------------------------------*/
2173 operand *geniCodeConditional (ast *tree)
2176 symbol *falseLabel = newiTempLabel(NULL);
2177 symbol *exitLabel = newiTempLabel(NULL);
2178 operand *cond = ast2iCode(tree->left);
2179 operand *true, *false , *result;
2181 ic = newiCodeCondition(geniCodeRValue(cond,FALSE),
2185 true = ast2iCode(tree->right->left);
2187 /* move the value to a new Operand */
2188 result = newiTempOperand(operandType(true),0);
2189 geniCodeAssign(result,geniCodeRValue(true,FALSE),0);
2191 /* generate an unconditional goto */
2192 geniCodeGoto(exitLabel);
2194 /* now for the right side */
2195 geniCodeLabel(falseLabel);
2197 false = ast2iCode(tree->right->right);
2198 geniCodeAssign(result,geniCodeRValue(false,FALSE),0);
2200 /* create the exit label */
2201 geniCodeLabel(exitLabel);
2206 /*-----------------------------------------------------------------*/
2207 /* geniCodeAssign - generate code for assignment */
2208 /*-----------------------------------------------------------------*/
2209 operand *geniCodeAssign (operand *left, operand *right, int nosupdate)
2212 link *ltype = operandType(left);
2213 link *rtype = operandType(right);
2215 if (!left->isaddr && !IS_ITEMP(left)) {
2216 werror(E_LVALUE_REQUIRED,"assignment");
2220 /* left is integral type and right is literal then
2221 check if the literal value is within bounds */
2222 if (IS_INTEGRAL(ltype) && right->type == VALUE && IS_LITERAL(rtype)) {
2223 int nbits = bitsForType(ltype);
2224 long v = operandLitValue(right);
2226 if (v > ((LONG_LONG)1 << nbits) && v > 0)
2227 werror(W_CONST_RANGE," = operation");
2230 /* if the left & right type don't exactly match */
2231 /* if pointer set then make sure the check is
2232 done with the type & not the pointer */
2233 /* then cast rights type to left */
2235 /* first check the type for pointer assignement */
2236 if (left->isaddr && IS_PTR(ltype) && IS_ITEMP(left) &&
2237 checkType(ltype,rtype)<0) {
2238 if (checkType(ltype->next,rtype) < 0)
2239 right = geniCodeCast(ltype->next,right,TRUE);
2241 if (checkType(ltype,rtype) < 0 )
2242 right = geniCodeCast(ltype,right,TRUE);
2244 /* if left is a true symbol & ! volatile
2245 create an assignment to temporary for
2246 the right & then assign this temporary
2247 to the symbol this is SSA . isn't it simple
2248 and folks have published mountains of paper on it */
2249 if (IS_TRUE_SYMOP(left) &&
2250 !isOperandVolatile(left,FALSE) &&
2251 isOperandGlobal(left)) {
2254 if (IS_TRUE_SYMOP(right))
2255 sym = OP_SYMBOL(right);
2256 ic = newiCode('=',NULL,right);
2257 IC_RESULT(ic) = right = newiTempOperand(ltype,0);
2258 SPIL_LOC(right) = sym ;
2262 ic = newiCode('=',NULL,right);
2263 IC_RESULT(ic) = left;
2266 /* if left isgptr flag is set then support
2267 routine will be required */
2271 ic->nosupdate = nosupdate;
2275 /*-----------------------------------------------------------------*/
2276 /* geniCodeSEParms - generate code for side effecting fcalls */
2277 /*-----------------------------------------------------------------*/
2278 static void geniCodeSEParms (ast *parms)
2283 if (parms->type == EX_OP && parms->opval.op == PARAM) {
2284 geniCodeSEParms (parms->left) ;
2285 geniCodeSEParms (parms->right);
2289 /* hack don't like this but too lazy to think of
2291 if (IS_ADDRESS_OF_OP(parms))
2292 parms->left->lvalue = 1;
2294 if (IS_CAST_OP(parms) &&
2295 IS_PTR(parms->ftype) &&
2296 IS_ADDRESS_OF_OP(parms->right))
2297 parms->right->left->lvalue = 1;
2299 parms->opval.oprnd =
2300 geniCodeRValue(ast2iCode (parms),FALSE);
2302 parms->type = EX_OPERAND ;
2305 /*-----------------------------------------------------------------*/
2306 /* geniCodeParms - generates parameters */
2307 /*-----------------------------------------------------------------*/
2308 static void geniCodeParms ( ast *parms , int *stack, link *fetype)
2316 /* if this is a param node then do the left & right */
2317 if (parms->type == EX_OP && parms->opval.op == PARAM) {
2318 geniCodeParms (parms->left, stack,fetype) ;
2319 geniCodeParms (parms->right, stack,fetype);
2323 /* get the parameter value */
2324 if (parms->type == EX_OPERAND)
2325 pval = parms->opval.oprnd ;
2327 /* maybe this else should go away ?? */
2328 /* hack don't like this but too lazy to think of
2330 if (IS_ADDRESS_OF_OP(parms))
2331 parms->left->lvalue = 1;
2333 if (IS_CAST_OP(parms) &&
2334 IS_PTR(parms->ftype) &&
2335 IS_ADDRESS_OF_OP(parms->right))
2336 parms->right->left->lvalue = 1;
2338 pval = geniCodeRValue(ast2iCode (parms),FALSE);
2341 /* if register parm then make it a send */
2342 if ((parms->argSym && IS_REGPARM(parms->argSym->etype)) ||
2343 IS_REGPARM(parms->etype)) {
2344 ic = newiCode(SEND,pval,NULL);
2347 /* now decide whether to push or assign */
2348 if (!(options.stackAuto || IS_RENT(fetype))) {
2351 operand *top = operandFromSymbol(parms->argSym);
2352 geniCodeAssign(top,pval,1);
2355 link *p = operandType(pval);
2357 ic = newiCode(IPUSH,pval,NULL);
2359 /* update the stack adjustment */
2360 *stack += getSize(IS_AGGREGATE(p)? aggrToPtr(p,FALSE):p);
2367 /*-----------------------------------------------------------------*/
2368 /* geniCodeCall - generates temp code for calling */
2369 /*-----------------------------------------------------------------*/
2370 operand *geniCodeCall (operand *left, ast *parms)
2377 /* take care of parameters with side-effecting
2378 function calls in them, this is required to take care
2379 of overlaying function parameters */
2380 geniCodeSEParms ( parms );
2382 /* first the parameters */
2383 geniCodeParms ( parms , &stack , getSpec(operandType(left)));
2385 /* now call : if symbol then pcall */
2387 ic = newiCode(PCALL,left,NULL);
2389 ic = newiCode(CALL,left,NULL);
2391 IC_ARGS(ic) = left->operand.symOperand->args ;
2392 type = copyLinkChain(operandType(left)->next);
2393 etype = getSpec(type);
2394 SPEC_EXTR(etype) = 0;
2395 IC_RESULT(ic) = result = newiTempOperand(type,1);
2399 /* stack adjustment after call */
2400 left->parmBytes = stack;
2405 /*-----------------------------------------------------------------*/
2406 /* geniCodeReceive - generate intermediate code for "receive" */
2407 /*-----------------------------------------------------------------*/
2408 static void geniCodeReceive (value *args)
2410 /* for all arguments that are passed in registers */
2413 if (IS_REGPARM(args->etype)) {
2414 operand *opr = operandFromValue(args);
2416 symbol *sym = OP_SYMBOL(opr);
2419 /* we will use it after all optimizations
2420 and before liveRange calculation */
2421 if (!sym->addrtaken && !IS_VOLATILE(sym->etype)) {
2423 if(IN_FARSPACE(SPEC_OCLS(sym->etype)) &&
2424 options.stackAuto == 0) {
2426 opl = newiTempOperand(args->type,0);
2428 sym->reqv->key = sym->key ;
2429 OP_SYMBOL(sym->reqv)->key = sym->key;
2430 OP_SYMBOL(sym->reqv)->isreqv = 1;
2431 OP_SYMBOL(sym->reqv)->islocal= 0;
2432 SPIL_LOC(sym->reqv) = sym;
2436 ic = newiCode(RECEIVE,NULL,NULL);
2437 currFunc->recvSize = getSize(sym->etype);
2438 IC_RESULT(ic) = opr;
2446 /*-----------------------------------------------------------------*/
2447 /* geniCodeFunctionBody - create the function body */
2448 /*-----------------------------------------------------------------*/
2449 void geniCodeFunctionBody (ast *tree)
2456 /* reset the auto generation */
2462 func = ast2iCode(tree->left);
2463 fetype = getSpec(operandType(func));
2465 savelineno = lineno;
2466 lineno = OP_SYMBOL(func)->lineDef;
2467 /* create an entry label */
2468 geniCodeLabel(entryLabel);
2469 lineno = savelineno;
2471 /* create a proc icode */
2472 ic = newiCode(FUNCTION,func,NULL);
2473 /* if the function has parmas then */
2474 /* save the parameters information */
2475 ic->argLabel.args = tree->values.args ;
2476 ic->lineno = OP_SYMBOL(func)->lineDef;
2480 /* for all parameters that are passed
2481 on registers add a "receive" */
2482 geniCodeReceive( tree->values.args );
2484 /* generate code for the body */
2485 ast2iCode(tree->right);
2487 /* create a label for return */
2488 geniCodeLabel(returnLabel);
2490 /* now generate the end proc */
2491 ic = newiCode(ENDFUNCTION,func,NULL);
2496 /*-----------------------------------------------------------------*/
2497 /* geniCodeReturn - gen icode for 'return' statement */
2498 /*-----------------------------------------------------------------*/
2499 void geniCodeReturn (operand *op)
2503 /* if the operand is present force an rvalue */
2505 op = geniCodeRValue(op,FALSE);
2507 ic = newiCode(RETURN,op,NULL);
2511 /*-----------------------------------------------------------------*/
2512 /* geniCodeIfx - generates code for extended if statement */
2513 /*-----------------------------------------------------------------*/
2514 void geniCodeIfx (ast *tree)
2517 operand *condition = ast2iCode(tree->left);
2520 /* if condition is null then exit */
2524 condition = geniCodeRValue(condition,FALSE);
2526 cetype = getSpec(operandType(condition));
2527 /* if the condition is a literal */
2528 if (IS_LITERAL(cetype)) {
2529 if (floatFromVal(condition->operand.valOperand)) {
2530 if (tree->trueLabel)
2531 geniCodeGoto(tree->trueLabel);
2536 if (tree->falseLabel)
2537 geniCodeGoto (tree->falseLabel);
2544 if ( tree->trueLabel ) {
2545 ic = newiCodeCondition(condition,
2550 if ( tree->falseLabel)
2551 geniCodeGoto(tree->falseLabel);
2554 ic = newiCodeCondition (condition,
2561 ast2iCode(tree->right);
2564 /*-----------------------------------------------------------------*/
2565 /* geniCodeJumpTable - tries to create a jump table for switch */
2566 /*-----------------------------------------------------------------*/
2567 int geniCodeJumpTable (operand *cond, value *caseVals, ast *tree)
2569 int min = 0 ,max = 0, t, cnt = 0;
2574 set *labels = NULL ;
2576 if (!tree || !caseVals)
2579 /* the criteria for creating a jump table is */
2580 /* all integer numbers between the maximum & minimum must */
2581 /* be present , the maximum value should not exceed 255 */
2582 min = max = (int)floatFromVal(vch = caseVals);
2583 sprintf(buffer,"_case_%d_%d",
2584 tree->values.switchVals.swNum,
2586 addSet(&labels,newiTempLabel(buffer));
2588 /* if there is only one case value then no need */
2589 if (!(vch = vch->next ))
2593 if (((t = (int)floatFromVal(vch)) - max) != 1)
2595 sprintf(buffer,"_case_%d_%d",
2596 tree->values.switchVals.swNum,
2598 addSet(&labels,newiTempLabel(buffer));
2604 /* if the number of case statements <= 2 then */
2605 /* it is not economical to create the jump table */
2606 /* since two compares are needed for boundary conditions */
2607 if ((! optimize.noJTabBoundary && cnt <= 2) || max > (255/3))
2610 if ( tree->values.switchVals.swDefault )
2611 sprintf (buffer,"_default_%d",tree->values.switchVals.swNum);
2613 sprintf (buffer,"_swBrk_%d",tree->values.switchVals.swNum );
2615 falseLabel = newiTempLabel (buffer);
2617 /* so we can create a jumptable */
2618 /* first we rule out the boundary conditions */
2619 /* if only optimization says so */
2620 if ( ! optimize.noJTabBoundary ) {
2621 link *cetype = getSpec(operandType(cond));
2622 /* no need to check the lower bound if
2623 the condition is unsigned & minimum value is zero */
2624 if (!( min == 0 && SPEC_USIGN(cetype))) {
2625 boundary = geniCodeLogic (cond,operandFromLit(min),'<');
2626 ic = newiCodeCondition (boundary,falseLabel,NULL);
2630 /* now for upper bounds */
2631 boundary = geniCodeLogic(cond,operandFromLit(max),'>');
2632 ic = newiCodeCondition (boundary,falseLabel,NULL);
2636 /* if the min is not zero then we no make it zero */
2638 cond = geniCodeSubtract(cond,operandFromLit(min));
2639 setOperandType(cond, UCHARTYPE);
2642 /* now create the jumptable */
2643 ic = newiCode(JUMPTABLE,NULL,NULL);
2644 IC_JTCOND(ic) = cond;
2645 IC_JTLABELS(ic) = labels;
2650 /*-----------------------------------------------------------------*/
2651 /* geniCodeSwitch - changes a switch to a if statement */
2652 /*-----------------------------------------------------------------*/
2653 void geniCodeSwitch (ast *tree)
2656 operand *cond = geniCodeRValue(ast2iCode (tree->left),FALSE);
2657 value *caseVals = tree->values.switchVals.swVals ;
2658 symbol *trueLabel , *falseLabel;
2660 /* if we can make this a jump table */
2661 if ( geniCodeJumpTable (cond,caseVals,tree) )
2662 goto jumpTable ; /* no need for the comparison */
2664 /* for the cases defined do */
2667 operand *compare = geniCodeLogic (cond,
2668 operandFromValue(caseVals),
2671 sprintf(buffer,"_case_%d_%d",
2672 tree->values.switchVals.swNum,
2673 (int) floatFromVal(caseVals));
2674 trueLabel = newiTempLabel(buffer);
2676 ic = newiCodeCondition(compare,trueLabel,NULL);
2678 caseVals = caseVals->next;
2683 /* if default is present then goto break else break */
2684 if ( tree->values.switchVals.swDefault )
2685 sprintf (buffer,"_default_%d",tree->values.switchVals.swNum);
2687 sprintf (buffer,"_swBrk_%d",tree->values.switchVals.swNum );
2689 falseLabel = newiTempLabel (buffer);
2690 geniCodeGoto(falseLabel);
2693 ast2iCode(tree->right);
2696 /*-----------------------------------------------------------------*/
2697 /* geniCodeInline - intermediate code for inline assembler */
2698 /*-----------------------------------------------------------------*/
2699 static void geniCodeInline (ast *tree)
2703 ic = newiCode(INLINEASM,NULL,NULL);
2704 IC_INLINE(ic) = tree->values.inlineasm;
2708 /*-----------------------------------------------------------------*/
2709 /* ast2iCode - creates an icodeList from an ast */
2710 /*-----------------------------------------------------------------*/
2711 operand *ast2iCode (ast *tree)
2713 operand *left = NULL;
2714 operand *right= NULL;
2719 /* set the global variables for filename & line number */
2720 if ( tree->filename )
2721 filename = tree->filename ;
2723 lineno = tree->lineno ;
2725 block = tree->block ;
2727 scopeLevel = tree->level;
2729 if (tree->type == EX_VALUE )
2730 return operandFromValue(tree->opval.val);
2732 if (tree->type == EX_LINK )
2733 return operandFromLink (tree->opval.lnk);
2735 /* if we find a nullop */
2736 if (tree->type == EX_OP &&
2737 ( tree->opval.op == NULLOP ||
2738 tree->opval.op == BLOCK )) {
2739 ast2iCode (tree->left);
2740 ast2iCode (tree->right);
2744 /* special cases for not evaluating */
2745 if ( tree->opval.op != ':' &&
2746 tree->opval.op != '?' &&
2747 tree->opval.op != CALL &&
2748 tree->opval.op != IFX &&
2749 tree->opval.op != LABEL &&
2750 tree->opval.op != GOTO &&
2751 tree->opval.op != SWITCH &&
2752 tree->opval.op != FUNCTION &&
2753 tree->opval.op != INLINEASM ) {
2754 if (IS_ASSIGN_OP(tree->opval.op) ||
2755 IS_DEREF_OP(tree) ||
2756 (tree->opval.op == '&' && !tree->right) ||
2757 tree->opval.op == PTR_OP) {
2759 if (IS_ARRAY_OP(tree->left) && IS_ARRAY_OP(tree->left->left)) {
2761 left = operandFromAst(tree->left);
2763 left = operandFromAst(tree->left);
2767 left = operandFromAst(tree->left);
2769 if (tree->opval.op == INC_OP ||
2770 tree->opval.op == DEC_OP) {
2772 right= operandFromAst(tree->right);
2775 right= operandFromAst(tree->right);
2779 /* now depending on the type of operand */
2780 /* this will be a biggy */
2781 switch (tree->opval.op) {
2783 case '[' : /* array operation */
2785 link *ltype = operandType(left);
2786 left= geniCodeRValue (left,IS_PTR(ltype->next) ? TRUE : FALSE);
2787 right=geniCodeRValue (right,TRUE);
2790 return geniCodeArray (left,right);
2792 case '.' : /* structure dereference */
2793 if (IS_PTR(operandType(left)))
2794 left = geniCodeRValue(left,TRUE);
2796 left = geniCodeRValue(left,FALSE);
2798 return geniCodeStruct (left,right,tree->lvalue);
2800 case PTR_OP: /* structure pointer dereference */
2803 pType = operandType(left);
2804 left = geniCodeRValue(left,TRUE);
2806 setOClass (pType,getSpec(operandType(left)));
2809 return geniCodeStruct (left, right,tree->lvalue);
2811 case INC_OP: /* increment operator */
2813 return geniCodePostInc (left);
2815 return geniCodePreInc (right);
2817 case DEC_OP: /* decrement operator */
2819 return geniCodePostDec (left);
2821 return geniCodePreDec (right);
2823 case '&' : /* bitwise and or address of operator */
2824 if ( right ) { /* this is a bitwise operator */
2825 left= geniCodeRValue(left,FALSE);
2826 right= geniCodeRValue(right,FALSE);
2827 return geniCodeBitwise (left,right,BITWISEAND,tree->ftype);
2829 return geniCodeAddressOf (left);
2831 case '|': /* bitwise or & xor */
2833 return geniCodeBitwise (geniCodeRValue(left,FALSE),
2834 geniCodeRValue(right,FALSE),
2839 return geniCodeDivision (geniCodeRValue(left,FALSE),
2840 geniCodeRValue(right,FALSE));
2843 return geniCodeModulus (geniCodeRValue(left,FALSE),
2844 geniCodeRValue(right,FALSE));
2847 return geniCodeMultiply (geniCodeRValue(left,FALSE),
2848 geniCodeRValue(right,FALSE));
2850 return geniCodeDerefPtr (geniCodeRValue(left,FALSE));
2854 return geniCodeSubtract (geniCodeRValue(left,FALSE),
2855 geniCodeRValue(right,FALSE));
2857 return geniCodeUnaryMinus (geniCodeRValue(left,FALSE));
2861 return geniCodeAdd (geniCodeRValue(left,FALSE),
2862 geniCodeRValue(right,FALSE));
2864 return geniCodeRValue(left,FALSE) ; /* unary '+' has no meaning */
2867 return geniCodeLeftShift (geniCodeRValue(left,FALSE),
2868 geniCodeRValue(right,FALSE));
2871 return geniCodeRightShift (geniCodeRValue(left,FALSE),
2872 geniCodeRValue(right,FALSE));
2874 return geniCodeCast (operandType(left),
2875 geniCodeRValue(right,FALSE),FALSE);
2881 return geniCodeUnary (geniCodeRValue(left,FALSE),tree->opval.op);
2885 operand *op = geniCodeUnary (geniCodeRValue(left,FALSE),tree->opval.op);
2886 setOperandType(op, UCHARTYPE);
2897 return geniCodeLogic (geniCodeRValue(left,FALSE),
2898 geniCodeRValue(right,FALSE),
2901 return geniCodeConditional (tree);
2904 return operandFromLit(getSize(tree->right->ftype));
2908 link *rtype = operandType(right);
2909 link *ltype = operandType(left);
2910 if (IS_PTR(rtype) && IS_ITEMP(right)
2911 && right->isaddr && checkType(rtype->next,ltype)==1)
2912 right = geniCodeRValue(right,TRUE);
2914 right = geniCodeRValue(right,FALSE);
2916 geniCodeAssign (left,right,0);
2921 geniCodeAssign(left,
2922 geniCodeMultiply(geniCodeRValue (operandFromOperand(left),
2924 geniCodeRValue(right,FALSE)),0);
2928 geniCodeAssign(left,
2929 geniCodeDivision(geniCodeRValue(operandFromOperand(left),
2931 geniCodeRValue(right,FALSE)),0);
2934 geniCodeAssign(left,
2935 geniCodeModulus(geniCodeRValue(operandFromOperand(left),
2937 geniCodeRValue(right,FALSE)),0);
2940 link *rtype = operandType(right);
2941 link *ltype = operandType(left);
2942 if (IS_PTR(rtype) && IS_ITEMP(right)
2943 && right->isaddr && checkType(rtype->next,ltype)==1)
2944 right = geniCodeRValue(right,TRUE);
2946 right = geniCodeRValue(right,FALSE);
2949 return geniCodeAssign(left,
2950 geniCodeAdd (geniCodeRValue(operandFromOperand(left),
2956 link *rtype = operandType(right);
2957 link *ltype = operandType(left);
2958 if (IS_PTR(rtype) && IS_ITEMP(right)
2959 && right->isaddr && checkType(rtype->next,ltype)==1) {
2960 right = geniCodeRValue(right,TRUE);
2963 right = geniCodeRValue(right,FALSE);
2966 geniCodeAssign (left,
2967 geniCodeSubtract(geniCodeRValue(operandFromOperand(left),
2973 geniCodeAssign (left,
2974 geniCodeLeftShift(geniCodeRValue(operandFromOperand(left)
2976 geniCodeRValue(right,FALSE)),0);
2979 geniCodeAssign(left,
2980 geniCodeRightShift(geniCodeRValue(operandFromOperand(left)
2982 geniCodeRValue(right,FALSE)),0);
2985 geniCodeAssign (left,
2986 geniCodeBitwise(geniCodeRValue(operandFromOperand(left),
2988 geniCodeRValue(right,FALSE),
2990 operandType(left)),0);
2993 geniCodeAssign (left,
2994 geniCodeBitwise (geniCodeRValue(operandFromOperand(left),
2996 geniCodeRValue(right,FALSE),
2998 operandType(left)),0);
3001 geniCodeAssign (left,
3002 geniCodeBitwise (geniCodeRValue(operandFromOperand(left)
3004 geniCodeRValue(right,FALSE),
3006 operandType(left)),0);
3008 return geniCodeRValue(right,FALSE);
3011 return geniCodeCall (ast2iCode(tree->left),
3014 geniCodeLabel(ast2iCode(tree->left)->operand.symOperand);
3015 return ast2iCode (tree->right);
3018 geniCodeGoto (ast2iCode(tree->left)->operand.symOperand);
3019 return ast2iCode (tree->right);
3022 geniCodeFunctionBody ( tree );
3026 geniCodeReturn (right);
3034 geniCodeSwitch (tree);
3038 geniCodeInline (tree);
3045 /*-----------------------------------------------------------------*/
3046 /* reverseICChain - gets from the list and creates a linkedlist */
3047 /*-----------------------------------------------------------------*/
3048 iCode *reverseiCChain ()
3050 iCode *loop = NULL ;
3051 iCode *prev = NULL ;
3053 while ((loop = getSet(&iCodeChain))) {
3064 /*-----------------------------------------------------------------*/
3065 /* iCodeFromAst - given an ast will convert it to iCode */
3066 /*-----------------------------------------------------------------*/
3067 iCode *iCodeFromAst ( ast *tree )
3069 returnLabel = newiTempLabel("_return");
3070 entryLabel = newiTempLabel("_entry") ;
3072 return reverseiCChain ();