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 -------------------------------------------------------------------------*/
29 /*-----------------------------------------------------------------*/
30 /* global variables */
32 set *iCodeChain = NULL;
42 symbol *returnLabel; /* function return label */
43 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 *,int);
50 operand *geniCodeArray2Ptr (operand *);
51 operand *geniCodeRValue (operand *, bool);
52 operand *geniCodeDerefPtr (operand *,int);
53 int isLvaluereq(int lvl);
55 #define PRINTFUNC(x) void x (FILE *of, iCode *ic, char *s)
56 /* forward definition of ic print functions */
57 PRINTFUNC (picGetValueAtAddr);
58 PRINTFUNC (picSetValueAtAddr);
59 PRINTFUNC (picAddrOf);
60 PRINTFUNC (picGeneric);
61 PRINTFUNC (picGenericOne);
63 PRINTFUNC (picAssign);
67 PRINTFUNC (picJumpTable);
68 PRINTFUNC (picInline);
69 PRINTFUNC (picReceive);
71 iCodeTable codeTable[] =
73 {'!', "not", picGenericOne, NULL},
74 {'~', "~", picGenericOne, NULL},
75 {RRC, "rrc", picGenericOne, NULL},
76 {RLC, "rlc", picGenericOne, NULL},
77 {GETHBIT, "ghbit", picGenericOne, NULL},
78 {UNARYMINUS, "-", picGenericOne, NULL},
79 {IPUSH, "push", picGenericOne, NULL},
80 {IPOP, "pop", picGenericOne, NULL},
81 {CALL, "call", picGenericOne, NULL},
82 {PCALL, "pcall", picGenericOne, NULL},
83 {FUNCTION, "proc", picGenericOne, NULL},
84 {ENDFUNCTION, "eproc", picGenericOne, NULL},
85 {RETURN, "ret", picGenericOne, NULL},
86 {'+', "+", picGeneric, NULL},
87 {'-', "-", picGeneric, NULL},
88 {'*', "*", picGeneric, NULL},
89 {'/', "/", picGeneric, NULL},
90 {'%', "%", picGeneric, NULL},
91 {'>', ">", picGeneric, NULL},
92 {'<', "<", picGeneric, NULL},
93 {LE_OP, "<=", picGeneric, NULL},
94 {GE_OP, ">=", picGeneric, NULL},
95 {EQ_OP, "==", picGeneric, NULL},
96 {NE_OP, "!=", picGeneric, NULL},
97 {AND_OP, "&&", picGeneric, NULL},
98 {OR_OP, "||", picGeneric, NULL},
99 {'^', "^", picGeneric, NULL},
100 {'|', "|", picGeneric, NULL},
101 {BITWISEAND, "&", picGeneric, NULL},
102 {LEFT_OP, "<<", picGeneric, NULL},
103 {RIGHT_OP, ">>", picGeneric, NULL},
104 {GET_VALUE_AT_ADDRESS, "@", picGetValueAtAddr, NULL},
105 {ADDRESS_OF, "&", picAddrOf, NULL},
106 {CAST, "<>", picCast, NULL},
107 {'=', ":=", picAssign, NULL},
108 {LABEL, "", picLabel, NULL},
109 {GOTO, "", picGoto, NULL},
110 {JUMPTABLE, "jtab", picJumpTable, NULL},
111 {IFX, "if", picIfx, NULL},
112 {INLINEASM, "", picInline, NULL},
113 {RECEIVE, "recv", picReceive, NULL},
114 {SEND, "send", picGenericOne, NULL},
115 {ARRAYINIT, "arrayInit", picGenericOne, NULL},
118 /*-----------------------------------------------------------------*/
119 /* checkConstantRange: check a constant against the type */
120 /*-----------------------------------------------------------------*/
122 /* pedantic=0: allmost anything is allowed as long as the absolute
123 value is within the bit range of the type, and -1 is treated as
124 0xf..f for unsigned types (e.g. in assign)
125 pedantic=1: -1==-1, not allowed for unsigned types (e.g. in compare)
126 pedantic>1: "char c=200" is not allowed (evaluates to -56)
129 void checkConstantRange(sym_link *ltype, value *val, char *msg,
136 max = pow ((double)2.0, (double)bitsForType(ltype));
138 if (SPEC_LONG(val->type)) {
139 if (SPEC_USIGN(val->type)) {
140 v=SPEC_CVAL(val->type).v_ulong;
142 v=SPEC_CVAL(val->type).v_long;
145 if (SPEC_USIGN(val->type)) {
146 v=SPEC_CVAL(val->type).v_uint;
148 v=SPEC_CVAL(val->type).v_int;
154 // this could be a good idea
155 if (options.pedantic)
159 if (SPEC_NOUN(ltype)==FLOAT) {
164 if (!SPEC_USIGN(val->type) && v<0) {
166 if (SPEC_USIGN(ltype) && (pedantic>1)) {
172 // if very pedantic: "char c=200" is not allowed
173 if (pedantic>1 && !SPEC_USIGN(ltype)) {
174 max = max/2 + negative;
181 #if 0 // temporary disabled, leaving the warning as a reminder
183 sprintf (message, "for %s %s in %s",
184 SPEC_USIGN(ltype) ? "unsigned" : "signed",
185 nounName(ltype), msg);
186 werror (W_CONST_RANGE, message);
194 /*-----------------------------------------------------------------*/
195 /* operandName - returns the name of the operand */
196 /*-----------------------------------------------------------------*/
198 printOperand (operand * op, FILE * file)
215 opetype = getSpec (operandType (op));
216 if (SPEC_NOUN (opetype) == V_FLOAT)
217 fprintf (file, "%g {", SPEC_CVAL (opetype).v_float);
219 fprintf (file, "0x%x {", (int) floatFromVal (op->operand.valOperand));
220 printTypeChain (operandType (op), file);
227 fprintf (file, "%s [k%d lr%d:%d so:%d]{ ia%d re%d rm%d nos%d ru%d dp%d}", /*{ar%d rm%d ru%d p%d a%d u%d i%d au%d k%d ks%d}" , */
228 (OP_SYMBOL (op)->rname[0] ? OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name),
230 OP_LIVEFROM (op), OP_LIVETO (op),
231 OP_SYMBOL (op)->stack,
232 op->isaddr, OP_SYMBOL (op)->isreqv,
233 OP_SYMBOL (op)->remat,OP_SYMBOL(op)->noSpilLoc,
234 OP_SYMBOL(op)->ruonly,OP_SYMBOL(op)->dptr
238 printTypeChain (operandType (op), file);
239 if (SPIL_LOC (op) && IS_ITEMP (op))
240 fprintf (file, "}{ sir@ %s", SPIL_LOC (op)->rname);
245 /* if assigned to registers */
246 if (OP_SYMBOL (op)->nRegs)
248 if (OP_SYMBOL (op)->isspilt)
250 if (!OP_SYMBOL (op)->remat)
251 if (OP_SYMBOL (op)->usl.spillLoc)
252 fprintf (file, "[%s]", (OP_SYMBOL (op)->usl.spillLoc->rname[0] ?
253 OP_SYMBOL (op)->usl.spillLoc->rname :
254 OP_SYMBOL (op)->usl.spillLoc->name));
256 fprintf (file, "[err]");
258 fprintf (file, "[remat]");
264 for (i = 0; i < OP_SYMBOL (op)->nRegs; i++)
265 fprintf (file, "%s ", port->getRegName (OP_SYMBOL (op)->regs[i]));
270 fprintf (file, "%s", (OP_SYMBOL (op)->rname[0] ?
271 OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name));
272 /* if assigned to registers */
273 if (OP_SYMBOL (op)->nRegs && !OP_SYMBOL (op)->isspilt)
277 for (i = 0; i < OP_SYMBOL (op)->nRegs; i++)
278 fprintf (file, "%s ", (OP_SYMBOL (op)->regs[i] ?
279 OP_SYMBOL (op)->regs[i]->name :
288 printTypeChain (op->operand.typeOperand, file);
294 fprintf (file, "\n");
299 /*-----------------------------------------------------------------*/
300 /* print functions */
301 /*-----------------------------------------------------------------*/
302 PRINTFUNC (picGetValueAtAddr)
305 printOperand (IC_RESULT (ic), of);
308 printOperand (IC_LEFT (ic), of);
314 PRINTFUNC (picSetValueAtAddr)
318 printOperand (IC_LEFT (ic), of);
319 fprintf (of, "] = ");
320 printOperand (IC_RIGHT (ic), of);
324 PRINTFUNC (picAddrOf)
327 printOperand (IC_RESULT (ic), of);
328 if (IS_ITEMP (IC_LEFT (ic)))
331 fprintf (of, " = &[");
332 printOperand (IC_LEFT (ic), of);
335 if (IS_ITEMP (IC_LEFT (ic)))
336 fprintf (of, " offsetAdd ");
339 printOperand (IC_RIGHT (ic), of);
341 if (IS_ITEMP (IC_LEFT (ic)))
347 PRINTFUNC (picJumpTable)
352 fprintf (of, "%s\t", s);
353 printOperand (IC_JTCOND (ic), of);
355 for (sym = setFirstItem (IC_JTLABELS (ic)); sym;
356 sym = setNextItem (IC_JTLABELS (ic)))
357 fprintf (of, "\t\t\t%s\n", sym->name);
360 PRINTFUNC (picGeneric)
363 printOperand (IC_RESULT (ic), of);
365 printOperand (IC_LEFT (ic), of);
366 fprintf (of, " %s ", s);
367 printOperand (IC_RIGHT (ic), of);
371 PRINTFUNC (picGenericOne)
376 printOperand (IC_RESULT (ic), of);
382 fprintf (of, "%s ", s);
383 printOperand (IC_LEFT (ic), of);
386 if (!IC_RESULT (ic) && !IC_LEFT (ic))
389 if (ic->op == SEND || ic->op == RECEIVE) {
390 fprintf(of,"{argreg = %d}",ic->argreg);
398 printOperand (IC_RESULT (ic), of);
400 printOperand (IC_LEFT (ic), of);
401 printOperand (IC_RIGHT (ic), of);
406 PRINTFUNC (picAssign)
410 if (IC_RESULT (ic)->isaddr && IS_ITEMP (IC_RESULT (ic)))
413 printOperand (IC_RESULT (ic), of);
415 if (IC_RESULT (ic)->isaddr && IS_ITEMP (IC_RESULT (ic)))
418 fprintf (of, " %s ", s);
419 printOperand (IC_RIGHT (ic), of);
426 fprintf (of, " %s($%d) :\n", IC_LABEL (ic)->name, IC_LABEL (ic)->key);
432 fprintf (of, " goto %s($%d)\n", IC_LABEL (ic)->name, IC_LABEL (ic)->key);
439 printOperand (IC_COND (ic), of);
442 fprintf (of, " == 0 goto %s($%d)\n", IC_FALSE (ic)->name, IC_FALSE (ic)->key);
445 fprintf (of, " != 0 goto %s($%d)\n", IC_TRUE (ic)->name, IC_TRUE (ic)->key);
447 fprintf (of, "\tzzgoto %s\n", IC_FALSE (ic)->name);
451 PRINTFUNC (picInline)
453 fprintf (of, "%s", IC_INLINE (ic));
456 PRINTFUNC (picReceive)
458 printOperand (IC_RESULT (ic), of);
459 fprintf (of, " = %s ", s);
460 printOperand (IC_LEFT (ic), of);
464 /*-----------------------------------------------------------------*/
465 /* piCode - prints one iCode */
466 /*-----------------------------------------------------------------*/
468 piCode (void *item, FILE * of)
476 icTab = getTableEntry (ic->op);
477 fprintf (stdout, "%s(%d:%d:%d:%d:%d)\t",
478 ic->filename, ic->lineno,
479 ic->seq, ic->key, ic->depth, ic->supportRtn);
480 icTab->iCodePrint (of, ic, icTab->printName);
486 printiCChain(ic,stdout);
488 /*-----------------------------------------------------------------*/
489 /* printiCChain - prints intermediate code for humans */
490 /*-----------------------------------------------------------------*/
492 printiCChain (iCode * icChain, FILE * of)
499 for (loop = icChain; loop; loop = loop->next)
501 if ((icTab = getTableEntry (loop->op)))
503 fprintf (of, "%s(%d:%d:%d:%d:%d)\t",
504 loop->filename, loop->lineno,
505 loop->seq, loop->key, loop->depth, loop->supportRtn);
507 icTab->iCodePrint (of, loop, icTab->printName);
513 /*-----------------------------------------------------------------*/
514 /* newOperand - allocate, init & return a new iCode */
515 /*-----------------------------------------------------------------*/
521 op = Safe_alloc ( sizeof (operand));
527 /*-----------------------------------------------------------------*/
528 /* newiCode - create and return a new iCode entry initialised */
529 /*-----------------------------------------------------------------*/
531 newiCode (int op, operand * left, operand * right)
535 ic = Safe_alloc ( sizeof (iCode));
538 ic->filename = filename;
540 ic->level = scopeLevel;
542 ic->key = iCodeKey++;
544 IC_RIGHT (ic) = right;
549 /*-----------------------------------------------------------------*/
550 /* newiCode for conditional statements */
551 /*-----------------------------------------------------------------*/
553 newiCodeCondition (operand * condition,
559 if (IS_VOID(operandType(condition))) {
560 werror(E_VOID_VALUE_USED);
563 ic = newiCode (IFX, NULL, NULL);
564 IC_COND (ic) = condition;
565 IC_TRUE (ic) = trueLabel;
566 IC_FALSE (ic) = falseLabel;
570 /*-----------------------------------------------------------------*/
571 /* newiCodeLabelGoto - unconditional goto statement| label stmnt */
572 /*-----------------------------------------------------------------*/
574 newiCodeLabelGoto (int op, symbol * label)
578 ic = newiCode (op, NULL, NULL);
580 ic->argLabel.label = label;
582 IC_RIGHT (ic) = NULL;
583 IC_RESULT (ic) = NULL;
587 /*-----------------------------------------------------------------*/
588 /* newiTemp - allocate & return a newItemp Variable */
589 /*-----------------------------------------------------------------*/
596 sprintf (buffer, "%s", s);
598 sprintf (buffer, "iTemp%d", iTempNum++);
599 itmp = newSymbol (buffer, 1);
600 strcpy (itmp->rname, itmp->name);
606 /*-----------------------------------------------------------------*/
607 /* newiTempLabel - creates a temp variable label */
608 /*-----------------------------------------------------------------*/
610 newiTempLabel (char *s)
614 /* check if this alredy exists */
615 if (s && (itmplbl = findSym (LabelTab, NULL, s)))
619 itmplbl = newSymbol (s, 1);
622 sprintf (buffer, "iTempLbl%d", iTempLblNum++);
623 itmplbl = newSymbol (buffer, 1);
628 itmplbl->key = labelKey++;
629 addSym (LabelTab, itmplbl, itmplbl->name, 0, 0, 0);
633 /*-----------------------------------------------------------------*/
634 /* newiTempPreheaderLabel - creates a new preheader label */
635 /*-----------------------------------------------------------------*/
637 newiTempPreheaderLabel ()
641 sprintf (buffer, "preHeaderLbl%d", iTempLblNum++);
642 itmplbl = newSymbol (buffer, 1);
646 itmplbl->key = labelKey++;
647 addSym (LabelTab, itmplbl, itmplbl->name, 0, 0, 0);
652 /*-----------------------------------------------------------------*/
653 /* initiCode - initialises some iCode related stuff */
654 /*-----------------------------------------------------------------*/
661 /*-----------------------------------------------------------------*/
662 /* copyiCode - make a copy of the iCode given */
663 /*-----------------------------------------------------------------*/
665 copyiCode (iCode * ic)
667 iCode *nic = newiCode (ic->op, NULL, NULL);
669 nic->lineno = ic->lineno;
670 nic->filename = ic->filename;
671 nic->block = ic->block;
672 nic->level = ic->level;
673 nic->parmBytes = ic->parmBytes;
675 /* deal with the special cases first */
679 IC_COND (nic) = operandFromOperand (IC_COND (ic));
680 IC_TRUE (nic) = IC_TRUE (ic);
681 IC_FALSE (nic) = IC_FALSE (ic);
685 IC_JTCOND (nic) = operandFromOperand (IC_JTCOND (ic));
686 IC_JTLABELS (nic) = IC_JTLABELS (ic);
691 IC_RESULT (nic) = operandFromOperand (IC_RESULT (ic));
692 IC_LEFT (nic) = operandFromOperand (IC_LEFT (ic));
696 IC_INLINE (nic) = IC_INLINE (ic);
700 IC_ARRAYILIST(nic) = IC_ARRAYILIST(ic);
704 IC_RESULT (nic) = operandFromOperand (IC_RESULT (ic));
705 IC_LEFT (nic) = operandFromOperand (IC_LEFT (ic));
706 IC_RIGHT (nic) = operandFromOperand (IC_RIGHT (ic));
712 /*-----------------------------------------------------------------*/
713 /* getTableEntry - gets the table entry for the given operator */
714 /*-----------------------------------------------------------------*/
716 getTableEntry (int oper)
720 for (i = 0; i < (sizeof (codeTable) / sizeof (iCodeTable)); i++)
721 if (oper == codeTable[i].icode)
722 return &codeTable[i];
727 /*-----------------------------------------------------------------*/
728 /* newiTempOperand - new intermediate temp operand */
729 /*-----------------------------------------------------------------*/
731 newiTempOperand (sym_link * type, char throwType)
734 operand *op = newOperand ();
738 itmp = newiTemp (NULL);
740 etype = getSpec (type);
742 if (IS_LITERAL (etype))
745 /* copy the type information */
747 itmp->etype = getSpec (itmp->type = (throwType ? type :
748 copyLinkChain (type)));
749 if (IS_LITERAL (itmp->etype))
751 SPEC_SCLS (itmp->etype) = S_REGISTER;
752 SPEC_OCLS (itmp->etype) = reg;
755 op->operand.symOperand = itmp;
756 op->key = itmp->key = ++operandKey;
760 /*-----------------------------------------------------------------*/
761 /* operandType - returns the type chain for an operand */
762 /*-----------------------------------------------------------------*/
764 operandType (operand * op)
766 /* depending on type of operand */
771 return op->operand.valOperand->type;
774 return op->operand.symOperand->type;
777 return op->operand.typeOperand;
779 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
780 " operand type not known ");
781 assert (0); /* should never come here */
782 /* Just to keep the compiler happy */
783 return (sym_link *) 0;
787 /*-----------------------------------------------------------------*/
788 /* isParamterToCall - will return 1 if op is a parameter to args */
789 /*-----------------------------------------------------------------*/
791 isParameterToCall (value * args, operand * op)
798 isSymbolEqual (op->operand.symOperand, tval->sym))
805 /*-----------------------------------------------------------------*/
806 /* isOperandGlobal - return 1 if operand is a global variable */
807 /*-----------------------------------------------------------------*/
809 isOperandGlobal (operand * op)
817 if (op->type == SYMBOL &&
818 (op->operand.symOperand->level == 0 ||
819 IS_STATIC (op->operand.symOperand->etype) ||
820 IS_EXTERN (op->operand.symOperand->etype))
827 /*-----------------------------------------------------------------*/
828 /* isOperandVolatile - return 1 if the operand is volatile */
829 /*-----------------------------------------------------------------*/
831 isOperandVolatile (operand * op, bool chkTemp)
836 if (IS_ITEMP (op) && !chkTemp)
839 opetype = getSpec (optype = operandType (op));
841 if (IS_PTR (optype) && DCL_PTR_VOLATILE (optype))
844 if (IS_VOLATILE (opetype))
849 /*-----------------------------------------------------------------*/
850 /* isOperandLiteral - returns 1 if an operand contains a literal */
851 /*-----------------------------------------------------------------*/
853 isOperandLiteral (operand * op)
860 opetype = getSpec (operandType (op));
862 if (IS_LITERAL (opetype))
868 /*-----------------------------------------------------------------*/
869 /* isOperandInFarSpace - will return true if operand is in farSpace */
870 /*-----------------------------------------------------------------*/
872 isOperandInFarSpace (operand * op)
882 if (!IS_TRUE_SYMOP (op))
885 etype = SPIL_LOC (op)->etype;
891 etype = getSpec (operandType (op));
893 return (IN_FARSPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
896 /*------------------------------------------------------------------*/
897 /* isOperandInDirSpace - will return true if operand is in dirSpace */
898 /*------------------------------------------------------------------*/
900 isOperandInDirSpace (operand * op)
910 if (!IS_TRUE_SYMOP (op))
913 etype = SPIL_LOC (op)->etype;
919 etype = getSpec (operandType (op));
921 return (IN_DIRSPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
924 /*--------------------------------------------------------------------*/
925 /* isOperandInCodeSpace - will return true if operand is in codeSpace */
926 /*--------------------------------------------------------------------*/
928 isOperandInCodeSpace (operand * op)
938 etype = getSpec (operandType (op));
940 if (!IS_TRUE_SYMOP (op))
943 etype = SPIL_LOC (op)->etype;
949 etype = getSpec (operandType (op));
951 return (IN_CODESPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
954 /*-----------------------------------------------------------------*/
955 /* isOperandOnStack - will return true if operand is on stack */
956 /*-----------------------------------------------------------------*/
958 isOperandOnStack (operand * op)
968 etype = getSpec (operandType (op));
969 if (IN_STACK (etype) ||
970 OP_SYMBOL(op)->onStack ||
971 (SPIL_LOC(op) && SPIL_LOC(op)->onStack))
977 /*-----------------------------------------------------------------*/
978 /* operandLitValue - literal value of an operand */
979 /*-----------------------------------------------------------------*/
981 operandLitValue (operand * op)
983 assert (isOperandLiteral (op));
985 return floatFromVal (op->operand.valOperand);
988 /*-----------------------------------------------------------------*/
989 /* getBuiltInParms - returns parameters to a builtin functions */
990 /*-----------------------------------------------------------------*/
991 iCode *getBuiltinParms (iCode *ic, int *pcount, operand **parms)
996 /* builtin functions uses only SEND for parameters */
997 while (ic->op != CALL) {
998 assert(ic->op == SEND && ic->builtinSEND);
999 ic->generated = 1; /* mark the icode as generated */
1000 parms[*pcount] = IC_LEFT(ic);
1006 /* make sure this is a builtin function call */
1007 assert(IS_SYMOP(IC_LEFT(ic)));
1008 ftype = operandType(IC_LEFT(ic));
1009 assert(IFFUNC_ISBUILTIN(ftype));
1013 /*-----------------------------------------------------------------*/
1014 /* operandOperation - perforoms operations on operands */
1015 /*-----------------------------------------------------------------*/
1017 operandOperation (operand * left, operand * right,
1018 int op, sym_link * type)
1020 sym_link *let , *ret=NULL;
1021 operand *retval = (operand *) 0;
1023 assert (isOperandLiteral (left));
1024 let = getSpec(operandType(left));
1026 assert (isOperandLiteral (right));
1027 ret = getSpec(operandType(left));
1033 retval = operandFromValue (valCastLiteral (type,
1034 operandLitValue (left) +
1035 operandLitValue (right)));
1038 retval = operandFromValue (valCastLiteral (type,
1039 operandLitValue (left) -
1040 operandLitValue (right)));
1043 retval = operandFromValue (valCastLiteral (type,
1044 operandLitValue (left) *
1045 operandLitValue (right)));
1048 if ((unsigned long) operandLitValue (right) == 0)
1050 werror (E_DIVIDE_BY_ZERO);
1055 retval = operandFromValue (valCastLiteral (type,
1056 operandLitValue (left) /
1057 operandLitValue (right)));
1060 if ((unsigned long) operandLitValue (right) == 0) {
1061 werror (E_DIVIDE_BY_ZERO);
1065 retval = operandFromLit ((SPEC_USIGN(let) ?
1066 (unsigned long) operandLitValue (left) :
1067 (long) operandLitValue (left)) %
1069 (unsigned long) operandLitValue (right) :
1070 (long) operandLitValue (right)));
1074 retval = operandFromLit ((SPEC_USIGN(let) ?
1075 (unsigned long) operandLitValue (left) :
1076 (long) operandLitValue (left)) <<
1078 (unsigned long) operandLitValue (right) :
1079 (long) operandLitValue (right)));
1082 double lval = operandLitValue(left), rval = operandLitValue(right);
1084 switch ((SPEC_USIGN(let) ? 2 : 0) + (SPEC_USIGN(ret) ? 1 : 0))
1086 case 0: // left=unsigned right=unsigned
1087 res=(unsigned long)lval >> (unsigned long)rval;
1089 case 1: // left=unsigned right=signed
1090 res=(unsigned long)lval >> (signed long)rval;
1092 case 2: // left=signed right=unsigned
1093 res=(signed long)lval >> (unsigned long)rval;
1095 case 3: // left=signed right=signed
1096 res=(signed long)lval >> (signed long)rval;
1099 retval = operandFromLit (res);
1103 retval = operandFromLit (operandLitValue (left) ==
1104 operandLitValue (right));
1107 retval = operandFromLit (operandLitValue (left) <
1108 operandLitValue (right));
1111 retval = operandFromLit (operandLitValue (left) <=
1112 operandLitValue (right));
1115 retval = operandFromLit (operandLitValue (left) !=
1116 operandLitValue (right));
1119 retval = operandFromLit (operandLitValue (left) >
1120 operandLitValue (right));
1123 retval = operandFromLit (operandLitValue (left) >=
1124 operandLitValue (right));
1127 retval = operandFromLit ((long)operandLitValue(left) &
1128 (long)operandLitValue(right));
1131 retval = operandFromLit ((long)operandLitValue (left) |
1132 (long)operandLitValue (right));
1135 retval = operandFromLit ((long)operandLitValue (left) ^
1136 (long)operandLitValue (right));
1139 retval = operandFromLit (operandLitValue (left) &&
1140 operandLitValue (right));
1143 retval = operandFromLit (operandLitValue (left) ||
1144 operandLitValue (right));
1148 long i = (long) operandLitValue (left);
1150 retval = operandFromLit ((i >> (getSize (operandType (left)) * 8 - 1)) |
1156 long i = (long) operandLitValue (left);
1158 retval = operandFromLit ((i << (getSize (operandType (left)) * 8 - 1)) |
1164 retval = operandFromLit (-1 * operandLitValue (left));
1168 retval = operandFromLit (~((long) operandLitValue (left)));
1172 retval = operandFromLit (!operandLitValue (left));
1176 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1177 " operandOperation invalid operator ");
1185 /*-----------------------------------------------------------------*/
1186 /* isOperandEqual - compares two operand & return 1 if they r = */
1187 /*-----------------------------------------------------------------*/
1189 isOperandEqual (operand * left, operand * right)
1191 /* if the pointers are equal then they are equal */
1195 /* if either of them null then false */
1196 if (!left || !right)
1199 if (left->type != right->type)
1202 if (IS_SYMOP (left) && IS_SYMOP (right))
1203 return left->key == right->key;
1205 /* if types are the same */
1209 return isSymbolEqual (left->operand.symOperand,
1210 right->operand.symOperand);
1212 return (floatFromVal (left->operand.valOperand) ==
1213 floatFromVal (right->operand.valOperand));
1215 if (compareType (left->operand.typeOperand,
1216 right->operand.typeOperand) == 1)
1223 /*-------------------------------------------------------------------*/
1224 /* isiCodeEqual - compares two iCodes are equal, returns true if yes */
1225 /*-------------------------------------------------------------------*/
1227 isiCodeEqual (iCode * left, iCode * right)
1229 /* if the same pointer */
1233 /* if either of them null */
1234 if (!left || !right)
1237 /* if operand are the same */
1238 if (left->op == right->op)
1241 /* compare all the elements depending on type */
1242 if (left->op != IFX)
1244 if (!isOperandEqual (IC_LEFT (left), IC_LEFT (right)))
1246 if (!isOperandEqual (IC_RIGHT (left), IC_RIGHT (right)))
1252 if (!isOperandEqual (IC_COND (left), IC_COND (right)))
1254 if (!isSymbolEqual (IC_TRUE (left), IC_TRUE (right)))
1256 if (!isSymbolEqual (IC_FALSE (left), IC_FALSE (right)))
1265 /*-----------------------------------------------------------------*/
1266 /* newiTempFromOp - create a temp Operand with same attributes */
1267 /*-----------------------------------------------------------------*/
1269 newiTempFromOp (operand * op)
1279 nop = newiTempOperand (operandType (op), TRUE);
1280 nop->isaddr = op->isaddr;
1281 nop->isvolatile = op->isvolatile;
1282 nop->isGlobal = op->isGlobal;
1283 nop->isLiteral = op->isLiteral;
1284 nop->usesDefs = op->usesDefs;
1285 nop->isParm = op->isParm;
1289 /*-----------------------------------------------------------------*/
1290 /* operand from operand - creates an operand holder for the type */
1291 /*-----------------------------------------------------------------*/
1293 operandFromOperand (operand * op)
1299 nop = newOperand ();
1300 nop->type = op->type;
1301 nop->isaddr = op->isaddr;
1303 nop->isvolatile = op->isvolatile;
1304 nop->isGlobal = op->isGlobal;
1305 nop->isLiteral = op->isLiteral;
1306 nop->usesDefs = op->usesDefs;
1307 nop->isParm = op->isParm;
1312 nop->operand.symOperand = op->operand.symOperand;
1315 nop->operand.valOperand = op->operand.valOperand;
1318 nop->operand.typeOperand = op->operand.typeOperand;
1325 /*-----------------------------------------------------------------*/
1326 /* opFromOpWithDU - makes a copy of the operand and DU chains */
1327 /*-----------------------------------------------------------------*/
1329 opFromOpWithDU (operand * op, bitVect * defs, bitVect * uses)
1331 operand *nop = operandFromOperand (op);
1333 if (nop->type == SYMBOL)
1335 OP_SYMBOL (nop)->defs = bitVectCopy (defs);
1336 OP_SYMBOL (nop)->uses = bitVectCopy (uses);
1342 /*-----------------------------------------------------------------*/
1343 /* operandFromSymbol - creates an operand from a symbol */
1344 /*-----------------------------------------------------------------*/
1346 operandFromSymbol (symbol * sym)
1351 /* if the symbol's type is a literal */
1352 /* then it is an enumerator type */
1353 if (IS_LITERAL (sym->etype) && SPEC_ENUM (sym->etype))
1354 return operandFromValue (valFromType (sym->etype));
1357 sym->key = ++operandKey;
1359 /* if this an implicit variable, means struct/union */
1360 /* member so just return it */
1361 if (sym->implicit || IS_FUNC (sym->type))
1365 op->operand.symOperand = sym;
1367 op->isvolatile = isOperandVolatile (op, TRUE);
1368 op->isGlobal = isOperandGlobal (op);
1372 /* under the following conditions create a
1373 register equivalent for a local symbol */
1374 if (sym->level && sym->etype && SPEC_OCLS (sym->etype) &&
1375 (IN_FARSPACE (SPEC_OCLS (sym->etype)) &&
1376 (!(options.model == MODEL_FLAT24)) ) &&
1377 options.stackAuto == 0)
1380 if (!IS_AGGREGATE (sym->type) && /* not an aggregate */
1381 !IS_FUNC (sym->type) && /* not a function */
1382 !sym->_isparm && /* not a parameter */
1383 sym->level && /* is a local variable */
1384 !sym->addrtaken && /* whose address has not been taken */
1385 !sym->reqv && /* does not already have a reg equivalence */
1386 !IS_VOLATILE (sym->etype) && /* not declared as volatile */
1387 !IS_STATIC (sym->etype) && /* and not declared static */
1388 !sym->islbl && /* not a label */
1389 ok && /* farspace check */
1390 !IS_BITVAR (sym->etype) /* not a bit variable */
1394 /* we will use it after all optimizations
1395 and before liveRange calculation */
1396 sym->reqv = newiTempOperand (sym->type, 0);
1397 sym->reqv->key = sym->key;
1398 OP_SYMBOL (sym->reqv)->key = sym->key;
1399 OP_SYMBOL (sym->reqv)->isreqv = 1;
1400 OP_SYMBOL (sym->reqv)->islocal = 1;
1401 OP_SYMBOL (sym->reqv)->onStack = sym->onStack;
1402 SPIL_LOC (sym->reqv) = sym;
1405 if (!IS_AGGREGATE (sym->type))
1409 op->operand.symOperand = sym;
1412 op->isvolatile = isOperandVolatile (op, TRUE);
1413 op->isGlobal = isOperandGlobal (op);
1414 op->isPtr = IS_PTR (operandType (op));
1415 op->isParm = sym->_isparm;
1420 /* itemp = &[_symbol] */
1422 ic = newiCode (ADDRESS_OF, newOperand (), NULL);
1423 IC_LEFT (ic)->type = SYMBOL;
1424 IC_LEFT (ic)->operand.symOperand = sym;
1425 IC_LEFT (ic)->key = sym->key;
1426 (IC_LEFT (ic))->isvolatile = isOperandVolatile (IC_LEFT (ic), TRUE);
1427 (IC_LEFT (ic))->isGlobal = isOperandGlobal (IC_LEFT (ic));
1428 IC_LEFT (ic)->isPtr = IS_PTR (operandType (IC_LEFT (ic)));
1431 IC_RESULT (ic) = newiTempOperand (sym->type, 0);
1432 if (IS_ARRAY (sym->type))
1434 IC_RESULT (ic) = geniCodeArray2Ptr (IC_RESULT (ic));
1435 IC_RESULT (ic)->isaddr = 0;
1438 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (sym->type));
1442 return IC_RESULT (ic);
1445 /*-----------------------------------------------------------------*/
1446 /* operandFromValue - creates an operand from value */
1447 /*-----------------------------------------------------------------*/
1449 operandFromValue (value * val)
1453 /* if this is a symbol then do the symbol thing */
1455 return operandFromSymbol (val->sym);
1457 /* this is not a symbol */
1460 op->operand.valOperand = val;
1461 op->isLiteral = isOperandLiteral (op);
1465 /*-----------------------------------------------------------------*/
1466 /* operandFromLink - operand from typeChain */
1467 /*-----------------------------------------------------------------*/
1469 operandFromLink (sym_link * type)
1473 /* operand from sym_link */
1479 op->operand.typeOperand = copyLinkChain (type);
1483 /*-----------------------------------------------------------------*/
1484 /* operandFromLit - makes an operand from a literal value */
1485 /*-----------------------------------------------------------------*/
1487 operandFromLit (double i)
1489 return operandFromValue (valueFromLit (i));
1492 /*-----------------------------------------------------------------*/
1493 /* operandFromAst - creates an operand from an ast */
1494 /*-----------------------------------------------------------------*/
1496 operandFromAst (ast * tree,int lvl)
1502 /* depending on type do */
1506 return ast2iCode (tree,lvl+1);
1510 return operandFromValue (tree->opval.val);
1514 return operandFromLink (tree->opval.lnk);
1518 /* Just to keep the comiler happy */
1519 return (operand *) 0;
1522 /*-----------------------------------------------------------------*/
1523 /* setOperandType - sets the operand's type to the given type */
1524 /*-----------------------------------------------------------------*/
1526 setOperandType (operand * op, sym_link * type)
1528 /* depending on the type of operand */
1533 op->operand.valOperand->etype =
1534 getSpec (op->operand.valOperand->type =
1535 copyLinkChain (type));
1539 if (op->operand.symOperand->isitmp)
1540 op->operand.symOperand->etype =
1541 getSpec (op->operand.symOperand->type =
1542 copyLinkChain (type));
1544 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1545 "attempt to modify type of source");
1549 op->operand.typeOperand = copyLinkChain (type);
1554 /*-----------------------------------------------------------------*/
1555 /* Get size in byte of ptr need to access an array */
1556 /*-----------------------------------------------------------------*/
1558 getArraySizePtr (operand * op)
1560 sym_link *ltype = operandType(op);
1564 int size = getSize(ltype);
1565 return(IS_GENPTR(ltype)?(size-1):size);
1570 sym_link *letype = getSpec(ltype);
1571 switch (PTR_TYPE (SPEC_OCLS (letype)))
1583 return (GPTRSIZE-1);
1592 /*-----------------------------------------------------------------*/
1593 /* perform "usual unary conversions" */
1594 /*-----------------------------------------------------------------*/
1596 usualUnaryConversions (operand * op)
1598 if (IS_INTEGRAL (operandType (op)))
1600 if (getSize (operandType (op)) < (unsigned int) INTSIZE)
1603 return geniCodeCast (INTTYPE, op, TRUE);
1609 /*-----------------------------------------------------------------*/
1610 /* perform "usual binary conversions" */
1611 /*-----------------------------------------------------------------*/
1613 usualBinaryConversions (operand ** op1, operand ** op2)
1616 sym_link *rtype = operandType (*op2);
1617 sym_link *ltype = operandType (*op1);
1619 ctype = computeType (ltype, rtype);
1620 *op1 = geniCodeCast (ctype, *op1, TRUE);
1621 *op2 = geniCodeCast (ctype, *op2, TRUE);
1626 /*-----------------------------------------------------------------*/
1627 /* geniCodeValueAtAddress - generate intermeditate code for value */
1629 /*-----------------------------------------------------------------*/
1631 geniCodeRValue (operand * op, bool force)
1634 sym_link *type = operandType (op);
1635 sym_link *etype = getSpec (type);
1637 /* if this is an array & already */
1638 /* an address then return this */
1639 if (IS_AGGREGATE (type) ||
1640 (IS_PTR (type) && !force && !op->isaddr))
1641 return operandFromOperand (op);
1643 /* if this is not an address then must be */
1644 /* rvalue already so return this one */
1648 /* if this is not a temp symbol then */
1649 if (!IS_ITEMP (op) &&
1651 !IN_FARSPACE (SPEC_OCLS (etype)))
1653 op = operandFromOperand (op);
1658 if (IS_SPEC (type) &&
1659 IS_TRUE_SYMOP (op) &&
1660 (!IN_FARSPACE (SPEC_OCLS (etype)) ||
1661 (options.model == MODEL_FLAT24) ))
1663 op = operandFromOperand (op);
1668 ic = newiCode (GET_VALUE_AT_ADDRESS, op, NULL);
1669 if (IS_PTR (type) && op->isaddr && force)
1672 type = copyLinkChain (type);
1674 IC_RESULT (ic) = newiTempOperand (type, 1);
1675 IC_RESULT (ic)->isaddr = 0;
1677 /* ic->supportRtn = ((IS_GENPTR(type) | op->isGptr) & op->isaddr); */
1681 return IC_RESULT (ic);
1684 /*-----------------------------------------------------------------*/
1685 /* geniCodeCast - changes the value from one type to another */
1686 /*-----------------------------------------------------------------*/
1688 geniCodeCast (sym_link * type, operand * op, bool implicit)
1692 sym_link *opetype = getSpec (optype = operandType (op));
1696 /* one of them has size zero then error */
1697 if (IS_VOID (optype))
1699 werror (E_CAST_ZERO);
1703 /* if the operand is already the desired type then do nothing */
1704 if (compareType (type, optype) == 1)
1707 /* if this is a literal then just change the type & return */
1708 if (IS_LITERAL (opetype) && op->type == VALUE && !IS_PTR (type) && !IS_PTR (optype))
1709 return operandFromValue (valCastLiteral (type,
1710 operandLitValue (op)));
1712 /* if casting to/from pointers, do some checking */
1713 if (IS_PTR(type)) { // to a pointer
1714 if (!IS_PTR(optype) && !IS_FUNC(optype) && !IS_AGGREGATE(optype)) { // from a non pointer
1715 if (IS_INTEGRAL(optype)) {
1716 // maybe this is NULL, than it's ok.
1717 if (!(IS_LITERAL(optype) && (SPEC_CVAL(optype).v_ulong ==0))) {
1718 if (!TARGET_IS_Z80 && !TARGET_IS_GBZ80 && IS_GENPTR(type)) {
1719 // no way to set the storage
1720 if (IS_LITERAL(optype)) {
1721 werror(E_LITERAL_GENERIC);
1724 werror(E_NONPTR2_GENPTR);
1727 } else if (implicit) {
1728 werror(W_INTEGRAL2PTR_NOCAST);
1733 // shouldn't do that with float, array or structure unless to void
1734 if (!IS_VOID(getSpec(type)) &&
1735 !(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1736 werror(E_INCOMPAT_TYPES);
1740 } else { // from a pointer to a pointer
1741 if (!TARGET_IS_Z80 && !TARGET_IS_GBZ80) {
1742 // if not a pointer to a function
1743 if (!(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1744 if (implicit) { // if not to generic, they have to match
1745 if ((!IS_GENPTR(type) && (DCL_TYPE(optype) != DCL_TYPE(type)))) {
1746 werror(E_INCOMPAT_PTYPES);
1753 } else { // to a non pointer
1754 if (IS_PTR(optype)) { // from a pointer
1755 if (implicit) { // sneaky
1756 if (IS_INTEGRAL(type)) {
1757 werror(W_PTR2INTEGRAL_NOCAST);
1759 } else { // shouldn't do that with float, array or structure
1760 werror(E_INCOMPAT_TYPES);
1767 printFromToType (optype, type);
1770 /* if they are the same size create an assignment */
1771 if (getSize (type) == getSize (optype) &&
1772 !IS_BITFIELD (type) &&
1774 !IS_FLOAT (optype) &&
1775 ((IS_SPEC (type) && IS_SPEC (optype)) ||
1776 (!IS_SPEC (type) && !IS_SPEC (optype))))
1779 ic = newiCode ('=', NULL, op);
1780 IC_RESULT (ic) = newiTempOperand (type, 0);
1781 SPIL_LOC (IC_RESULT (ic)) =
1782 (IS_TRUE_SYMOP (op) ? OP_SYMBOL (op) : NULL);
1783 IC_RESULT (ic)->isaddr = 0;
1787 ic = newiCode (CAST, operandFromLink (type),
1788 geniCodeRValue (op, FALSE));
1790 IC_RESULT (ic) = newiTempOperand (type, 0);
1793 /* preserve the storage class & output class */
1794 /* of the original variable */
1795 restype = getSpec (operandType (IC_RESULT (ic)));
1796 if (!IS_LITERAL(opetype))
1797 SPEC_SCLS (restype) = SPEC_SCLS (opetype);
1798 SPEC_OCLS (restype) = SPEC_OCLS (opetype);
1801 return IC_RESULT (ic);
1804 /*-----------------------------------------------------------------*/
1805 /* geniCodeLabel - will create a Label */
1806 /*-----------------------------------------------------------------*/
1808 geniCodeLabel (symbol * label)
1812 ic = newiCodeLabelGoto (LABEL, label);
1816 /*-----------------------------------------------------------------*/
1817 /* geniCodeGoto - will create a Goto */
1818 /*-----------------------------------------------------------------*/
1820 geniCodeGoto (symbol * label)
1824 ic = newiCodeLabelGoto (GOTO, label);
1828 /*-----------------------------------------------------------------*/
1829 /* geniCodeMultiply - gen intermediate code for multiplication */
1830 /*-----------------------------------------------------------------*/
1832 geniCodeMultiply (operand * left, operand * right,int resultIsInt)
1839 /* if they are both literal then we know the result */
1840 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1841 return operandFromValue (valMult (left->operand.valOperand,
1842 right->operand.valOperand));
1844 if (IS_LITERAL(retype)) {
1845 p2 = powof2 ((unsigned long) floatFromVal (right->operand.valOperand));
1848 resType = usualBinaryConversions (&left, &right);
1850 rtype = operandType (right);
1851 retype = getSpec (rtype);
1852 ltype = operandType (left);
1853 letype = getSpec (ltype);
1857 SPEC_NOUN(getSpec(resType))=V_INT;
1860 /* if the right is a literal & power of 2 */
1861 /* then make it a left shift */
1862 /* code generated for 1 byte * 1 byte literal = 2 bytes result is more
1863 efficient in most cases than 2 bytes result = 2 bytes << literal
1864 if port has 1 byte muldiv */
1865 if (p2 && !IS_FLOAT (letype) &&
1866 !((resultIsInt) && (getSize (resType) != getSize (ltype)) &&
1867 (port->support.muldiv == 1)))
1869 if ((resultIsInt) && (getSize (resType) != getSize (ltype)))
1871 /* LEFT_OP need same size for left and result, */
1872 left = geniCodeCast (resType, left, TRUE);
1873 ltype = operandType (left);
1875 ic = newiCode (LEFT_OP, left, operandFromLit (p2)); /* left shift */
1879 ic = newiCode ('*', left, right); /* normal multiplication */
1880 /* if the size left or right > 1 then support routine */
1881 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1885 IC_RESULT (ic) = newiTempOperand (resType, 1);
1888 return IC_RESULT (ic);
1891 /*-----------------------------------------------------------------*/
1892 /* geniCodeDivision - gen intermediate code for division */
1893 /*-----------------------------------------------------------------*/
1895 geniCodeDivision (operand * left, operand * right)
1900 sym_link *rtype = operandType (right);
1901 sym_link *retype = getSpec (rtype);
1902 sym_link *ltype = operandType (left);
1903 sym_link *letype = getSpec (ltype);
1905 resType = usualBinaryConversions (&left, &right);
1907 /* if the right is a literal & power of 2 */
1908 /* then make it a right shift */
1909 if (IS_LITERAL (retype) &&
1910 !IS_FLOAT (letype) &&
1911 (p2 = powof2 ((unsigned long)
1912 floatFromVal (right->operand.valOperand)))) {
1913 ic = newiCode (RIGHT_OP, left, operandFromLit (p2)); /* right shift */
1917 ic = newiCode ('/', left, right); /* normal division */
1918 /* if the size left or right > 1 then support routine */
1919 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1922 IC_RESULT (ic) = newiTempOperand (resType, 0);
1925 return IC_RESULT (ic);
1927 /*-----------------------------------------------------------------*/
1928 /* geniCodeModulus - gen intermediate code for modulus */
1929 /*-----------------------------------------------------------------*/
1931 geniCodeModulus (operand * left, operand * right)
1937 /* if they are both literal then we know the result */
1938 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1939 return operandFromValue (valMod (left->operand.valOperand,
1940 right->operand.valOperand));
1942 resType = usualBinaryConversions (&left, &right);
1944 /* now they are the same size */
1945 ic = newiCode ('%', left, right);
1947 /* if the size left or right > 1 then support routine */
1948 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1950 IC_RESULT (ic) = newiTempOperand (resType, 0);
1953 return IC_RESULT (ic);
1956 /*-----------------------------------------------------------------*/
1957 /* geniCodePtrPtrSubtract - subtracts pointer from pointer */
1958 /*-----------------------------------------------------------------*/
1960 geniCodePtrPtrSubtract (operand * left, operand * right)
1966 /* if they are both literals then */
1967 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1969 result = operandFromValue (valMinus (left->operand.valOperand,
1970 right->operand.valOperand));
1974 ic = newiCode ('-', left, right);
1976 IC_RESULT (ic) = result = newiTempOperand (newIntLink (), 1);
1980 return geniCodeDivision (result,
1981 operandFromLit (getSize (ltype->next)));
1984 /*-----------------------------------------------------------------*/
1985 /* geniCodeSubtract - generates code for subtraction */
1986 /*-----------------------------------------------------------------*/
1988 geniCodeSubtract (operand * left, operand * right)
1995 /* if they both pointers then */
1996 if ((IS_PTR (ltype) || IS_ARRAY (ltype)) &&
1997 (IS_PTR (rtype) || IS_ARRAY (rtype)))
1998 return geniCodePtrPtrSubtract (left, right);
2000 /* if they are both literal then we know the result */
2001 if (IS_LITERAL (letype) && IS_LITERAL (retype)
2002 && left->isLiteral && right->isLiteral)
2003 return operandFromValue (valMinus (left->operand.valOperand,
2004 right->operand.valOperand));
2006 /* if left is an array or pointer */
2007 if (IS_PTR (ltype) || IS_ARRAY (ltype))
2009 isarray = left->isaddr;
2010 right = geniCodeMultiply (right,
2011 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
2012 resType = copyLinkChain (IS_ARRAY (ltype) ? ltype->next : ltype);
2015 { /* make them the same size */
2016 resType = usualBinaryConversions (&left, &right);
2019 ic = newiCode ('-', left, right);
2021 IC_RESULT (ic) = newiTempOperand (resType, 1);
2022 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
2024 /* if left or right is a float */
2025 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
2029 return IC_RESULT (ic);
2032 /*-----------------------------------------------------------------*/
2033 /* geniCodeAdd - generates iCode for addition */
2034 /*-----------------------------------------------------------------*/
2036 geniCodeAdd (operand * left, operand * right, int lvl)
2044 /* if left is an array then array access */
2045 if (IS_ARRAY (ltype))
2046 return geniCodeArray (left, right,lvl);
2048 /* if the right side is LITERAL zero */
2049 /* return the left side */
2050 if (IS_LITERAL (retype) && right->isLiteral && !floatFromVal (valFromType (retype)))
2053 /* if left is literal zero return right */
2054 if (IS_LITERAL (letype) && left->isLiteral && !floatFromVal (valFromType (letype)))
2057 /* if left is a pointer then size */
2060 isarray = left->isaddr;
2061 // there is no need to multiply with 1
2062 if (getSize(ltype->next)!=1) {
2063 size = operandFromLit (getSize (ltype->next));
2064 right = geniCodeMultiply (right, size, (getArraySizePtr(left) >= INTSIZE));
2066 resType = copyLinkChain (ltype);
2069 { // make them the same size
2070 resType = usualBinaryConversions (&left, &right);
2073 /* if they are both literals then we know */
2074 if (IS_LITERAL (letype) && IS_LITERAL (retype)
2075 && left->isLiteral && right->isLiteral)
2076 return operandFromValue (valPlus (valFromType (letype),
2077 valFromType (retype)));
2079 ic = newiCode ('+', left, right);
2081 IC_RESULT (ic) = newiTempOperand (resType, 1);
2082 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
2084 /* if left or right is a float then support
2086 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
2091 return IC_RESULT (ic);
2095 /*-----------------------------------------------------------------*/
2096 /* aggrToPtr - changes an aggregate to pointer to an aggregate */
2097 /*-----------------------------------------------------------------*/
2099 aggrToPtr (sym_link * type, bool force)
2105 if (IS_PTR (type) && !force)
2108 etype = getSpec (type);
2112 /* if the output class is generic */
2113 if ((DCL_TYPE (ptype) = PTR_TYPE (SPEC_OCLS (etype))) == CPOINTER)
2114 DCL_PTR_CONST (ptype) = port->mem.code_ro;
2116 /* if the variable was declared a constant */
2117 /* then the pointer points to a constant */
2118 if (IS_CONSTANT (etype))
2119 DCL_PTR_CONST (ptype) = 1;
2121 /* the variable was volatile then pointer to volatile */
2122 if (IS_VOLATILE (etype))
2123 DCL_PTR_VOLATILE (ptype) = 1;
2127 /*-----------------------------------------------------------------*/
2128 /* geniCodeArray2Ptr - array to pointer */
2129 /*-----------------------------------------------------------------*/
2131 geniCodeArray2Ptr (operand * op)
2133 sym_link *optype = operandType (op);
2134 sym_link *opetype = getSpec (optype);
2136 /* set the pointer depending on the storage class */
2137 if ((DCL_TYPE (optype) = PTR_TYPE (SPEC_OCLS (opetype))) == CPOINTER)
2138 DCL_PTR_CONST (optype) = port->mem.code_ro;
2141 /* if the variable was declared a constant */
2142 /* then the pointer points to a constant */
2143 if (IS_CONSTANT (opetype))
2144 DCL_PTR_CONST (optype) = 1;
2146 /* the variable was volatile then pointer to volatile */
2147 if (IS_VOLATILE (opetype))
2148 DCL_PTR_VOLATILE (optype) = 1;
2154 /*-----------------------------------------------------------------*/
2155 /* geniCodeArray - array access */
2156 /*-----------------------------------------------------------------*/
2158 geniCodeArray (operand * left, operand * right,int lvl)
2161 sym_link *ltype = operandType (left);
2165 if (IS_PTR (ltype->next) && left->isaddr)
2167 left = geniCodeRValue (left, FALSE);
2169 return geniCodeDerefPtr (geniCodeAdd (left, right, lvl), lvl);
2172 right = geniCodeMultiply (right,
2173 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
2175 /* we can check for limits here */
2176 if (isOperandLiteral (right) &&
2179 (operandLitValue (right) / getSize (ltype->next)) >= DCL_ELEM (ltype))
2181 werror (E_ARRAY_BOUND);
2182 right = operandFromLit (0);
2185 ic = newiCode ('+', left, right);
2187 IC_RESULT (ic) = newiTempOperand (((IS_PTR (ltype) &&
2188 !IS_AGGREGATE (ltype->next) &&
2189 !IS_PTR (ltype->next))
2190 ? ltype : ltype->next), 0);
2192 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (ltype->next));
2194 return IC_RESULT (ic);
2197 /*-----------------------------------------------------------------*/
2198 /* geniCodeStruct - generates intermediate code for structres */
2199 /*-----------------------------------------------------------------*/
2201 geniCodeStruct (operand * left, operand * right, bool islval)
2204 sym_link *type = operandType (left);
2205 sym_link *etype = getSpec (type);
2207 symbol *element = getStructElement (SPEC_STRUCT (etype),
2208 right->operand.symOperand);
2210 /* add the offset */
2211 ic = newiCode ('+', left, operandFromLit (element->offset));
2213 IC_RESULT (ic) = newiTempOperand (element->type, 0);
2215 /* preserve the storage & output class of the struct */
2216 /* as well as the volatile attribute */
2217 retype = getSpec (operandType (IC_RESULT (ic)));
2218 SPEC_SCLS (retype) = SPEC_SCLS (etype);
2219 SPEC_OCLS (retype) = SPEC_OCLS (etype);
2220 SPEC_VOLATILE (retype) |= SPEC_VOLATILE (etype);
2222 if (IS_PTR (element->type))
2223 setOperandType (IC_RESULT (ic), aggrToPtr (operandType (IC_RESULT (ic)), TRUE));
2225 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (element->type));
2229 return (islval ? IC_RESULT (ic) : geniCodeRValue (IC_RESULT (ic), TRUE));
2232 /*-----------------------------------------------------------------*/
2233 /* geniCodePostInc - generate int code for Post increment */
2234 /*-----------------------------------------------------------------*/
2236 geniCodePostInc (operand * op)
2240 sym_link *optype = operandType (op);
2242 operand *rv = (IS_ITEMP (op) ?
2243 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2245 sym_link *rvtype = operandType (rv);
2248 /* if this is not an address we have trouble */
2251 werror (E_LVALUE_REQUIRED, "++");
2255 rOp = newiTempOperand (rvtype, 0);
2256 OP_SYMBOL(rOp)->noSpilLoc = 1;
2259 OP_SYMBOL(rv)->noSpilLoc = 1;
2261 geniCodeAssign (rOp, rv, 0);
2263 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2264 if (IS_FLOAT (rvtype))
2265 ic = newiCode ('+', rv, operandFromValue (constFloatVal ("1.0")));
2267 ic = newiCode ('+', rv, operandFromLit (size));
2269 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2272 geniCodeAssign (op, result, 0);
2278 /*-----------------------------------------------------------------*/
2279 /* geniCodePreInc - generate code for preIncrement */
2280 /*-----------------------------------------------------------------*/
2282 geniCodePreInc (operand * op)
2285 sym_link *optype = operandType (op);
2286 operand *rop = (IS_ITEMP (op) ?
2287 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2289 sym_link *roptype = operandType (rop);
2295 werror (E_LVALUE_REQUIRED, "++");
2300 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2301 if (IS_FLOAT (roptype))
2302 ic = newiCode ('+', rop, operandFromValue (constFloatVal ("1.0")));
2304 ic = newiCode ('+', rop, operandFromLit (size));
2305 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2309 return geniCodeAssign (op, result, 0);
2312 /*-----------------------------------------------------------------*/
2313 /* geniCodePostDec - generates code for Post decrement */
2314 /*-----------------------------------------------------------------*/
2316 geniCodePostDec (operand * op)
2320 sym_link *optype = operandType (op);
2322 operand *rv = (IS_ITEMP (op) ?
2323 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2325 sym_link *rvtype = operandType (rv);
2328 /* if this is not an address we have trouble */
2331 werror (E_LVALUE_REQUIRED, "--");
2335 rOp = newiTempOperand (rvtype, 0);
2336 OP_SYMBOL(rOp)->noSpilLoc = 1;
2339 OP_SYMBOL(rv)->noSpilLoc = 1;
2341 geniCodeAssign (rOp, rv, 0);
2343 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2344 if (IS_FLOAT (rvtype))
2345 ic = newiCode ('-', rv, operandFromValue (constFloatVal ("1.0")));
2347 ic = newiCode ('-', rv, operandFromLit (size));
2349 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2352 geniCodeAssign (op, result, 0);
2358 /*-----------------------------------------------------------------*/
2359 /* geniCodePreDec - generate code for pre decrement */
2360 /*-----------------------------------------------------------------*/
2362 geniCodePreDec (operand * op)
2365 sym_link *optype = operandType (op);
2366 operand *rop = (IS_ITEMP (op) ?
2367 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2369 sym_link *roptype = operandType (rop);
2375 werror (E_LVALUE_REQUIRED, "--");
2380 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2381 if (IS_FLOAT (roptype))
2382 ic = newiCode ('-', rop, operandFromValue (constFloatVal ("1.0")));
2384 ic = newiCode ('-', rop, operandFromLit (size));
2385 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2389 return geniCodeAssign (op, result, 0);
2393 /*-----------------------------------------------------------------*/
2394 /* geniCodeBitwise - gen int code for bitWise operators */
2395 /*-----------------------------------------------------------------*/
2397 geniCodeBitwise (operand * left, operand * right,
2398 int oper, sym_link * resType)
2402 left = geniCodeCast (resType, left, TRUE);
2403 right = geniCodeCast (resType, right, TRUE);
2405 ic = newiCode (oper, left, right);
2406 IC_RESULT (ic) = newiTempOperand (resType, 0);
2409 return IC_RESULT (ic);
2412 /*-----------------------------------------------------------------*/
2413 /* geniCodeAddressOf - gens icode for '&' address of operator */
2414 /*-----------------------------------------------------------------*/
2416 geniCodeAddressOf (operand * op)
2420 sym_link *optype = operandType (op);
2421 sym_link *opetype = getSpec (optype);
2423 /* lvalue check already done in decorateType */
2424 /* this must be a lvalue */
2425 /* if (!op->isaddr && !IS_AGGREGATE(optype)) { */
2426 /* werror (E_LVALUE_REQUIRED,"&"); */
2431 p->class = DECLARATOR;
2433 /* set the pointer depending on the storage class */
2434 if ((DCL_TYPE (p) = PTR_TYPE (SPEC_OCLS (opetype))) == CPOINTER)
2435 DCL_PTR_CONST (p) = port->mem.code_ro;
2437 /* make sure we preserve the const & volatile */
2438 if (IS_CONSTANT (opetype))
2439 DCL_PTR_CONST (p) = 1;
2441 if (IS_VOLATILE (opetype))
2442 DCL_PTR_VOLATILE (p) = 1;
2444 p->next = copyLinkChain (optype);
2446 /* if already a temp */
2449 setOperandType (op, p);
2454 /* other wise make this of the type coming in */
2455 ic = newiCode (ADDRESS_OF, op, NULL);
2456 IC_RESULT (ic) = newiTempOperand (p, 1);
2457 IC_RESULT (ic)->isaddr = 0;
2459 return IC_RESULT (ic);
2461 /*-----------------------------------------------------------------*/
2462 /* setOClass - sets the output class depending on the pointer type */
2463 /*-----------------------------------------------------------------*/
2465 setOClass (sym_link * ptr, sym_link * spec)
2467 switch (DCL_TYPE (ptr))
2470 SPEC_OCLS (spec) = data;
2474 SPEC_OCLS (spec) = generic;
2478 SPEC_OCLS (spec) = xdata;
2482 SPEC_OCLS (spec) = code;
2486 SPEC_OCLS (spec) = idata;
2490 SPEC_OCLS (spec) = xstack;
2494 SPEC_OCLS (spec) = eeprom;
2503 /*-----------------------------------------------------------------*/
2504 /* geniCodeDerefPtr - dereference pointer with '*' */
2505 /*-----------------------------------------------------------------*/
2507 geniCodeDerefPtr (operand * op,int lvl)
2509 sym_link *rtype, *retype;
2510 sym_link *optype = operandType (op);
2512 /* if this is a pointer then generate the rvalue */
2513 if (IS_PTR (optype))
2515 if (IS_TRUE_SYMOP (op))
2518 op = geniCodeRValue (op, TRUE);
2521 op = geniCodeRValue (op, TRUE);
2524 /* now get rid of the pointer part */
2525 if (isLvaluereq(lvl) && IS_ITEMP (op))
2527 retype = getSpec (rtype = copyLinkChain (optype));
2531 retype = getSpec (rtype = copyLinkChain (optype->next));
2534 /* if this is a pointer then outputclass needs 2b updated */
2535 if (IS_PTR (optype))
2536 setOClass (optype, retype);
2538 op->isGptr = IS_GENPTR (optype);
2540 /* if the pointer was declared as a constant */
2541 /* then we cannot allow assignment to the derefed */
2542 if (IS_PTR_CONST (optype))
2543 SPEC_CONST (retype) = 1;
2545 op->isaddr = (IS_PTR (rtype) ||
2546 IS_STRUCT (rtype) ||
2551 if (!isLvaluereq(lvl))
2552 op = geniCodeRValue (op, TRUE);
2554 setOperandType (op, rtype);
2559 /*-----------------------------------------------------------------*/
2560 /* geniCodeUnaryMinus - does a unary minus of the operand */
2561 /*-----------------------------------------------------------------*/
2563 geniCodeUnaryMinus (operand * op)
2566 sym_link *optype = operandType (op);
2568 if (IS_LITERAL (optype))
2569 return operandFromLit (-floatFromVal (op->operand.valOperand));
2571 ic = newiCode (UNARYMINUS, op, NULL);
2572 IC_RESULT (ic) = newiTempOperand (optype, 0);
2574 return IC_RESULT (ic);
2577 /*-----------------------------------------------------------------*/
2578 /* geniCodeLeftShift - gen i code for left shift */
2579 /*-----------------------------------------------------------------*/
2581 geniCodeLeftShift (operand * left, operand * right)
2585 ic = newiCode (LEFT_OP, left, right);
2586 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2588 return IC_RESULT (ic);
2591 /*-----------------------------------------------------------------*/
2592 /* geniCodeRightShift - gen i code for right shift */
2593 /*-----------------------------------------------------------------*/
2595 geniCodeRightShift (operand * left, operand * right)
2599 ic = newiCode (RIGHT_OP, left, right);
2600 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2602 return IC_RESULT (ic);
2605 /*-----------------------------------------------------------------*/
2606 /* geniCodeLogic- logic code */
2607 /*-----------------------------------------------------------------*/
2609 geniCodeLogic (operand * left, operand * right, int op)
2613 sym_link *rtype = operandType (right);
2614 sym_link *ltype = operandType (left);
2616 /* left is integral type and right is literal then
2617 check if the literal value is within bounds */
2618 if (IS_INTEGRAL (ltype) && IS_VALOP (right) && IS_LITERAL (rtype))
2620 checkConstantRange(ltype,
2621 OP_VALUE(right), "compare operation", 1);
2624 ctype = usualBinaryConversions (&left, &right);
2626 ic = newiCode (op, left, right);
2627 IC_RESULT (ic) = newiTempOperand (newCharLink (), 1);
2629 /* if comparing float
2630 and not a '==' || '!=' || '&&' || '||' (these
2632 if (IS_FLOAT(ctype) &&
2640 return IC_RESULT (ic);
2643 /*-----------------------------------------------------------------*/
2644 /* geniCodeUnary - for a a generic unary operation */
2645 /*-----------------------------------------------------------------*/
2647 geniCodeUnary (operand * op, int oper)
2649 iCode *ic = newiCode (oper, op, NULL);
2651 IC_RESULT (ic) = newiTempOperand (operandType (op), 0);
2653 return IC_RESULT (ic);
2656 /*-----------------------------------------------------------------*/
2657 /* geniCodeConditional - geniCode for '?' ':' operation */
2658 /*-----------------------------------------------------------------*/
2660 geniCodeConditional (ast * tree,int lvl)
2663 symbol *falseLabel = newiTempLabel (NULL);
2664 symbol *exitLabel = newiTempLabel (NULL);
2665 operand *cond = ast2iCode (tree->left,lvl+1);
2666 operand *true, *false, *result;
2668 ic = newiCodeCondition (geniCodeRValue (cond, FALSE),
2672 true = ast2iCode (tree->right->left,lvl+1);
2674 /* move the value to a new Operand */
2675 result = newiTempOperand (tree->right->ftype, 0);
2676 geniCodeAssign (result, geniCodeRValue (true, FALSE), 0);
2678 /* generate an unconditional goto */
2679 geniCodeGoto (exitLabel);
2681 /* now for the right side */
2682 geniCodeLabel (falseLabel);
2684 false = ast2iCode (tree->right->right,lvl+1);
2685 geniCodeAssign (result, geniCodeRValue (false, FALSE), 0);
2687 /* create the exit label */
2688 geniCodeLabel (exitLabel);
2693 /*-----------------------------------------------------------------*/
2694 /* geniCodeAssign - generate code for assignment */
2695 /*-----------------------------------------------------------------*/
2697 geniCodeAssign (operand * left, operand * right, int nosupdate)
2700 sym_link *ltype = operandType (left);
2701 sym_link *rtype = operandType (right);
2703 if (!left->isaddr && !IS_ITEMP (left))
2705 werror (E_LVALUE_REQUIRED, "assignment");
2709 /* left is integral type and right is literal then
2710 check if the literal value is within bounds */
2711 if (IS_INTEGRAL (ltype) && right->type == VALUE && IS_LITERAL (rtype))
2713 checkConstantRange(ltype,
2714 OP_VALUE(right), "= operation", 0);
2717 /* if the left & right type don't exactly match */
2718 /* if pointer set then make sure the check is
2719 done with the type & not the pointer */
2720 /* then cast rights type to left */
2722 /* first check the type for pointer assignement */
2723 if (left->isaddr && IS_PTR (ltype) && IS_ITEMP (left) &&
2724 compareType (ltype, rtype) <= 0)
2726 if (compareType (ltype->next, rtype) < 0)
2727 right = geniCodeCast (ltype->next, right, TRUE);
2729 else if (compareType (ltype, rtype) < 0)
2730 right = geniCodeCast (ltype, right, TRUE);
2732 /* if left is a true symbol & ! volatile
2733 create an assignment to temporary for
2734 the right & then assign this temporary
2735 to the symbol this is SSA . isn't it simple
2736 and folks have published mountains of paper on it */
2737 if (IS_TRUE_SYMOP (left) &&
2738 !isOperandVolatile (left, FALSE) &&
2739 isOperandGlobal (left))
2743 if (IS_TRUE_SYMOP (right))
2744 sym = OP_SYMBOL (right);
2745 ic = newiCode ('=', NULL, right);
2746 IC_RESULT (ic) = right = newiTempOperand (ltype, 0);
2747 SPIL_LOC (right) = sym;
2751 ic = newiCode ('=', NULL, right);
2752 IC_RESULT (ic) = left;
2755 /* if left isgptr flag is set then support
2756 routine will be required */
2760 ic->nosupdate = nosupdate;
2764 /*-----------------------------------------------------------------*/
2765 /* geniCodeSEParms - generate code for side effecting fcalls */
2766 /*-----------------------------------------------------------------*/
2768 geniCodeSEParms (ast * parms,int lvl)
2773 if (parms->type == EX_OP && parms->opval.op == PARAM)
2775 geniCodeSEParms (parms->left,lvl);
2776 geniCodeSEParms (parms->right,lvl);
2780 /* hack don't like this but too lazy to think of
2782 if (IS_ADDRESS_OF_OP (parms))
2783 parms->left->lvalue = 1;
2785 if (IS_CAST_OP (parms) &&
2786 IS_PTR (parms->ftype) &&
2787 IS_ADDRESS_OF_OP (parms->right))
2788 parms->right->left->lvalue = 1;
2790 parms->opval.oprnd =
2791 geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
2793 parms->type = EX_OPERAND;
2794 AST_ARGREG(parms) = SPEC_ARGREG(parms->etype);
2797 /*-----------------------------------------------------------------*/
2798 /* geniCodeParms - generates parameters */
2799 /*-----------------------------------------------------------------*/
2801 geniCodeParms (ast * parms, value *argVals, int *stack,
2802 sym_link * fetype, symbol * func,int lvl)
2810 if (argVals==NULL) {
2812 argVals=FUNC_ARGS(func->type);
2815 /* if this is a param node then do the left & right */
2816 if (parms->type == EX_OP && parms->opval.op == PARAM)
2818 argVals=geniCodeParms (parms->left, argVals, stack, fetype, func,lvl);
2819 argVals=geniCodeParms (parms->right, argVals, stack, fetype, func,lvl);
2823 /* get the parameter value */
2824 if (parms->type == EX_OPERAND)
2825 pval = parms->opval.oprnd;
2828 /* maybe this else should go away ?? */
2829 /* hack don't like this but too lazy to think of
2831 if (IS_ADDRESS_OF_OP (parms))
2832 parms->left->lvalue = 1;
2834 if (IS_CAST_OP (parms) &&
2835 IS_PTR (parms->ftype) &&
2836 IS_ADDRESS_OF_OP (parms->right))
2837 parms->right->left->lvalue = 1;
2839 pval = geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
2842 /* if register parm then make it a send */
2843 if ((IS_REGPARM (parms->etype) && !IFFUNC_HASVARARGS(func->type)) ||
2844 IFFUNC_ISBUILTIN(func->type))
2846 ic = newiCode (SEND, pval, NULL);
2847 ic->argreg = SPEC_ARGREG(parms->etype);
2848 ic->builtinSEND = FUNC_ISBUILTIN(func->type);
2853 /* now decide whether to push or assign */
2854 if (!(options.stackAuto || IFFUNC_ISREENT (func->type)))
2858 operand *top = operandFromSymbol (argVals->sym);
2859 /* clear useDef and other bitVectors */
2860 OP_USES (top) = OP_DEFS (top) = OP_SYMBOL(top)->clashes = NULL;
2861 geniCodeAssign (top, pval, 1);
2865 sym_link *p = operandType (pval);
2867 ic = newiCode (IPUSH, pval, NULL);
2869 /* update the stack adjustment */
2870 *stack += getSize (IS_AGGREGATE (p) ? aggrToPtr (p, FALSE) : p);
2875 argVals=argVals->next;
2879 /*-----------------------------------------------------------------*/
2880 /* geniCodeCall - generates temp code for calling */
2881 /*-----------------------------------------------------------------*/
2883 geniCodeCall (operand * left, ast * parms,int lvl)
2887 sym_link *type, *etype;
2890 if (!IS_FUNC(OP_SYMBOL(left)->type) &&
2891 !IS_CODEPTR(OP_SYMBOL(left)->type)) {
2892 werror (E_FUNCTION_EXPECTED);
2896 /* take care of parameters with side-effecting
2897 function calls in them, this is required to take care
2898 of overlaying function parameters */
2899 geniCodeSEParms (parms,lvl);
2901 /* first the parameters */
2902 geniCodeParms (parms, NULL, &stack, getSpec (operandType (left)), OP_SYMBOL (left),lvl);
2904 /* now call : if symbol then pcall */
2905 if (IS_OP_POINTER (left) || IS_ITEMP(left)) {
2906 ic = newiCode (PCALL, left, NULL);
2908 ic = newiCode (CALL, left, NULL);
2911 type = copyLinkChain (operandType (left)->next);
2912 etype = getSpec (type);
2913 SPEC_EXTR (etype) = 0;
2914 IC_RESULT (ic) = result = newiTempOperand (type, 1);
2918 /* stack adjustment after call */
2919 ic->parmBytes = stack;
2924 /*-----------------------------------------------------------------*/
2925 /* geniCodeReceive - generate intermediate code for "receive" */
2926 /*-----------------------------------------------------------------*/
2928 geniCodeReceive (value * args)
2930 /* for all arguments that are passed in registers */
2934 if (IS_REGPARM (args->etype))
2936 operand *opr = operandFromValue (args);
2938 symbol *sym = OP_SYMBOL (opr);
2941 /* we will use it after all optimizations
2942 and before liveRange calculation */
2943 if (!sym->addrtaken && !IS_VOLATILE (sym->etype))
2946 if (IN_FARSPACE (SPEC_OCLS (sym->etype)) &&
2947 options.stackAuto == 0 &&
2948 (!(options.model == MODEL_FLAT24)) )
2953 opl = newiTempOperand (args->type, 0);
2955 sym->reqv->key = sym->key;
2956 OP_SYMBOL (sym->reqv)->key = sym->key;
2957 OP_SYMBOL (sym->reqv)->isreqv = 1;
2958 OP_SYMBOL (sym->reqv)->islocal = 0;
2959 SPIL_LOC (sym->reqv) = sym;
2963 ic = newiCode (RECEIVE, NULL, NULL);
2964 ic->argreg = SPEC_ARGREG(args->etype);
2966 currFunc->recvSize = getSize (sym->type);
2969 IC_RESULT (ic) = opr;
2977 /*-----------------------------------------------------------------*/
2978 /* geniCodeFunctionBody - create the function body */
2979 /*-----------------------------------------------------------------*/
2981 geniCodeFunctionBody (ast * tree,int lvl)
2988 /* reset the auto generation */
2994 func = ast2iCode (tree->left,lvl+1);
2995 fetype = getSpec (operandType (func));
2997 savelineno = lineno;
2998 lineno = OP_SYMBOL (func)->lineDef;
2999 /* create an entry label */
3000 geniCodeLabel (entryLabel);
3001 lineno = savelineno;
3003 /* create a proc icode */
3004 ic = newiCode (FUNCTION, func, NULL);
3005 lineno=ic->lineno = OP_SYMBOL (func)->lineDef;
3009 /* for all parameters that are passed
3010 on registers add a "receive" */
3011 geniCodeReceive (tree->values.args);
3013 /* generate code for the body */
3014 ast2iCode (tree->right,lvl+1);
3016 /* create a label for return */
3017 geniCodeLabel (returnLabel);
3019 /* now generate the end proc */
3020 ic = newiCode (ENDFUNCTION, func, NULL);
3025 /*-----------------------------------------------------------------*/
3026 /* geniCodeReturn - gen icode for 'return' statement */
3027 /*-----------------------------------------------------------------*/
3029 geniCodeReturn (operand * op)
3033 /* if the operand is present force an rvalue */
3035 op = geniCodeRValue (op, FALSE);
3037 ic = newiCode (RETURN, op, NULL);
3041 /*-----------------------------------------------------------------*/
3042 /* geniCodeIfx - generates code for extended if statement */
3043 /*-----------------------------------------------------------------*/
3045 geniCodeIfx (ast * tree,int lvl)
3048 operand *condition = ast2iCode (tree->left,lvl+1);
3051 /* if condition is null then exit */
3055 condition = geniCodeRValue (condition, FALSE);
3057 cetype = getSpec (operandType (condition));
3058 /* if the condition is a literal */
3059 if (IS_LITERAL (cetype))
3061 if (floatFromVal (condition->operand.valOperand))
3063 if (tree->trueLabel)
3064 geniCodeGoto (tree->trueLabel);
3070 if (tree->falseLabel)
3071 geniCodeGoto (tree->falseLabel);
3078 if (tree->trueLabel)
3080 ic = newiCodeCondition (condition,
3085 if (tree->falseLabel)
3086 geniCodeGoto (tree->falseLabel);
3090 ic = newiCodeCondition (condition,
3097 ast2iCode (tree->right,lvl+1);
3100 /*-----------------------------------------------------------------*/
3101 /* geniCodeJumpTable - tries to create a jump table for switch */
3102 /*-----------------------------------------------------------------*/
3104 geniCodeJumpTable (operand * cond, value * caseVals, ast * tree)
3106 int min = 0, max = 0, t, cnt = 0;
3113 if (!tree || !caseVals)
3116 /* the criteria for creating a jump table is */
3117 /* all integer numbers between the maximum & minimum must */
3118 /* be present , the maximum value should not exceed 255 */
3119 min = max = (int) floatFromVal (vch = caseVals);
3120 sprintf (buffer, "_case_%d_%d",
3121 tree->values.switchVals.swNum,
3123 addSet (&labels, newiTempLabel (buffer));
3125 /* if there is only one case value then no need */
3126 if (!(vch = vch->next))
3131 if (((t = (int) floatFromVal (vch)) - max) != 1)
3133 sprintf (buffer, "_case_%d_%d",
3134 tree->values.switchVals.swNum,
3136 addSet (&labels, newiTempLabel (buffer));
3142 /* if the number of case statements <= 2 then */
3143 /* it is not economical to create the jump table */
3144 /* since two compares are needed for boundary conditions */
3145 if ((!optimize.noJTabBoundary && cnt <= 2) || max > (255 / 3))
3148 if (tree->values.switchVals.swDefault)
3149 sprintf (buffer, "_default_%d", tree->values.switchVals.swNum);
3151 sprintf (buffer, "_swBrk_%d", tree->values.switchVals.swNum);
3153 falseLabel = newiTempLabel (buffer);
3155 /* so we can create a jumptable */
3156 /* first we rule out the boundary conditions */
3157 /* if only optimization says so */
3158 if (!optimize.noJTabBoundary)
3160 sym_link *cetype = getSpec (operandType (cond));
3161 /* no need to check the lower bound if
3162 the condition is unsigned & minimum value is zero */
3163 if (!(min == 0 && SPEC_USIGN (cetype)))
3165 boundary = geniCodeLogic (cond, operandFromLit (min), '<');
3166 ic = newiCodeCondition (boundary, falseLabel, NULL);
3170 /* now for upper bounds */
3171 boundary = geniCodeLogic (cond, operandFromLit (max), '>');
3172 ic = newiCodeCondition (boundary, falseLabel, NULL);
3176 /* if the min is not zero then we no make it zero */
3179 cond = geniCodeSubtract (cond, operandFromLit (min));
3180 setOperandType (cond, UCHARTYPE);
3183 /* now create the jumptable */
3184 ic = newiCode (JUMPTABLE, NULL, NULL);
3185 IC_JTCOND (ic) = cond;
3186 IC_JTLABELS (ic) = labels;
3191 /*-----------------------------------------------------------------*/
3192 /* geniCodeSwitch - changes a switch to a if statement */
3193 /*-----------------------------------------------------------------*/
3195 geniCodeSwitch (ast * tree,int lvl)
3198 operand *cond = geniCodeRValue (ast2iCode (tree->left,lvl+1), FALSE);
3199 value *caseVals = tree->values.switchVals.swVals;
3200 symbol *trueLabel, *falseLabel;
3202 /* if we can make this a jump table */
3203 if (geniCodeJumpTable (cond, caseVals, tree))
3204 goto jumpTable; /* no need for the comparison */
3206 /* for the cases defined do */
3210 operand *compare = geniCodeLogic (cond,
3211 operandFromValue (caseVals),
3214 sprintf (buffer, "_case_%d_%d",
3215 tree->values.switchVals.swNum,
3216 (int) floatFromVal (caseVals));
3217 trueLabel = newiTempLabel (buffer);
3219 ic = newiCodeCondition (compare, trueLabel, NULL);
3221 caseVals = caseVals->next;
3226 /* if default is present then goto break else break */
3227 if (tree->values.switchVals.swDefault)
3228 sprintf (buffer, "_default_%d", tree->values.switchVals.swNum);
3230 sprintf (buffer, "_swBrk_%d", tree->values.switchVals.swNum);
3232 falseLabel = newiTempLabel (buffer);
3233 geniCodeGoto (falseLabel);
3236 ast2iCode (tree->right,lvl+1);
3239 /*-----------------------------------------------------------------*/
3240 /* geniCodeInline - intermediate code for inline assembler */
3241 /*-----------------------------------------------------------------*/
3243 geniCodeInline (ast * tree)
3247 ic = newiCode (INLINEASM, NULL, NULL);
3248 IC_INLINE (ic) = tree->values.inlineasm;
3252 /*-----------------------------------------------------------------*/
3253 /* geniCodeArrayInit - intermediate code for array initializer */
3254 /*-----------------------------------------------------------------*/
3256 geniCodeArrayInit (ast * tree, operand *array)
3260 if (!getenv("TRY_THE_NEW_INITIALIZER")) {
3261 ic = newiCode (ARRAYINIT, array, NULL);
3262 IC_ARRAYILIST (ic) = tree->values.constlist;
3264 operand *left=newOperand(), *right=newOperand();
3265 left->type=right->type=SYMBOL;
3266 OP_SYMBOL(left)=AST_SYMBOL(tree->left);
3267 OP_SYMBOL(right)=AST_SYMBOL(tree->right);
3268 ic = newiCode (ARRAYINIT, left, right);
3273 /*-----------------------------------------------------------------*/
3274 /* Stuff used in ast2iCode to modify geniCodeDerefPtr in some */
3275 /* particular case. Ie : assigning or dereferencing array or ptr */
3276 /*-----------------------------------------------------------------*/
3277 set * lvaluereqSet = NULL;
3278 typedef struct lvalItem
3285 /*-----------------------------------------------------------------*/
3286 /* addLvaluereq - add a flag for lvalreq for current ast level */
3287 /*-----------------------------------------------------------------*/
3288 void addLvaluereq(int lvl)
3290 lvalItem * lpItem = (lvalItem *)Safe_alloc ( sizeof (lvalItem));
3293 addSetHead(&lvaluereqSet,lpItem);
3296 /*-----------------------------------------------------------------*/
3297 /* delLvaluereq - del a flag for lvalreq for current ast level */
3298 /*-----------------------------------------------------------------*/
3302 lpItem = getSet(&lvaluereqSet);
3303 if(lpItem) Safe_free(lpItem);
3305 /*-----------------------------------------------------------------*/
3306 /* clearLvaluereq - clear lvalreq flag */
3307 /*-----------------------------------------------------------------*/
3308 void clearLvaluereq()
3311 lpItem = peekSet(lvaluereqSet);
3312 if(lpItem) lpItem->req = 0;
3314 /*-----------------------------------------------------------------*/
3315 /* getLvaluereq - get the last lvalreq level */
3316 /*-----------------------------------------------------------------*/
3317 int getLvaluereqLvl()
3320 lpItem = peekSet(lvaluereqSet);
3321 if(lpItem) return lpItem->lvl;
3324 /*-----------------------------------------------------------------*/
3325 /* isLvaluereq - is lvalreq valid for this level ? */
3326 /*-----------------------------------------------------------------*/
3327 int isLvaluereq(int lvl)
3330 lpItem = peekSet(lvaluereqSet);
3331 if(lpItem) return ((lpItem->req)&&(lvl <= (lpItem->lvl+1)));
3335 /*-----------------------------------------------------------------*/
3336 /* ast2iCode - creates an icodeList from an ast */
3337 /*-----------------------------------------------------------------*/
3339 ast2iCode (ast * tree,int lvl)
3341 operand *left = NULL;
3342 operand *right = NULL;
3346 /* set the global variables for filename & line number */
3348 filename = tree->filename;
3350 lineno = tree->lineno;
3352 block = tree->block;
3354 scopeLevel = tree->level;
3356 if (tree->type == EX_VALUE)
3357 return operandFromValue (tree->opval.val);
3359 if (tree->type == EX_LINK)
3360 return operandFromLink (tree->opval.lnk);
3362 /* if we find a nullop */
3363 if (tree->type == EX_OP &&
3364 (tree->opval.op == NULLOP ||
3365 tree->opval.op == BLOCK))
3367 ast2iCode (tree->left,lvl+1);
3368 ast2iCode (tree->right,lvl+1);
3372 /* special cases for not evaluating */
3373 if (tree->opval.op != ':' &&
3374 tree->opval.op != '?' &&
3375 tree->opval.op != CALL &&
3376 tree->opval.op != IFX &&
3377 tree->opval.op != LABEL &&
3378 tree->opval.op != GOTO &&
3379 tree->opval.op != SWITCH &&
3380 tree->opval.op != FUNCTION &&
3381 tree->opval.op != INLINEASM)
3384 if (IS_ASSIGN_OP (tree->opval.op) ||
3385 IS_DEREF_OP (tree) ||
3386 (tree->opval.op == '&' && !tree->right) ||
3387 tree->opval.op == PTR_OP)
3390 if ((IS_ARRAY_OP (tree->left) && IS_ARRAY_OP (tree->left->left)) ||
3391 (IS_DEREF_OP (tree) && IS_ARRAY_OP (tree->left)))
3394 left = operandFromAst (tree->left,lvl);
3396 if (IS_DEREF_OP (tree) && IS_DEREF_OP (tree->left))
3397 left = geniCodeRValue (left, TRUE);
3401 left = operandFromAst (tree->left,lvl);
3403 if (tree->opval.op == INC_OP ||
3404 tree->opval.op == DEC_OP)
3407 right = operandFromAst (tree->right,lvl);
3412 right = operandFromAst (tree->right,lvl);
3416 /* now depending on the type of operand */
3417 /* this will be a biggy */
3418 switch (tree->opval.op)
3421 case '[': /* array operation */
3423 //sym_link *ltype = operandType (left);
3424 //left = geniCodeRValue (left, IS_PTR (ltype->next) ? TRUE : FALSE);
3425 left = geniCodeRValue (left, FALSE);
3426 right = geniCodeRValue (right, TRUE);
3429 return geniCodeArray (left, right,lvl);
3431 case '.': /* structure dereference */
3432 if (IS_PTR (operandType (left)))
3433 left = geniCodeRValue (left, TRUE);
3435 left = geniCodeRValue (left, FALSE);
3437 return geniCodeStruct (left, right, tree->lvalue);
3439 case PTR_OP: /* structure pointer dereference */
3442 pType = operandType (left);
3443 left = geniCodeRValue (left, TRUE);
3445 setOClass (pType, getSpec (operandType (left)));
3448 return geniCodeStruct (left, right, tree->lvalue);
3450 case INC_OP: /* increment operator */
3452 return geniCodePostInc (left);
3454 return geniCodePreInc (right);
3456 case DEC_OP: /* decrement operator */
3458 return geniCodePostDec (left);
3460 return geniCodePreDec (right);
3462 case '&': /* bitwise and or address of operator */
3464 { /* this is a bitwise operator */
3465 left = geniCodeRValue (left, FALSE);
3466 right = geniCodeRValue (right, FALSE);
3467 return geniCodeBitwise (left, right, BITWISEAND, tree->ftype);
3470 return geniCodeAddressOf (left);
3472 case '|': /* bitwise or & xor */
3474 return geniCodeBitwise (geniCodeRValue (left, FALSE),
3475 geniCodeRValue (right, FALSE),
3480 return geniCodeDivision (geniCodeRValue (left, FALSE),
3481 geniCodeRValue (right, FALSE));
3484 return geniCodeModulus (geniCodeRValue (left, FALSE),
3485 geniCodeRValue (right, FALSE));
3488 return geniCodeMultiply (geniCodeRValue (left, FALSE),
3489 geniCodeRValue (right, FALSE),IS_INT(tree->ftype));
3491 return geniCodeDerefPtr (geniCodeRValue (left, FALSE),lvl);
3495 return geniCodeSubtract (geniCodeRValue (left, FALSE),
3496 geniCodeRValue (right, FALSE));
3498 return geniCodeUnaryMinus (geniCodeRValue (left, FALSE));
3502 return geniCodeAdd (geniCodeRValue (left, FALSE),
3503 geniCodeRValue (right, FALSE),lvl);
3505 return geniCodeRValue (left, FALSE); /* unary '+' has no meaning */
3508 return geniCodeLeftShift (geniCodeRValue (left, FALSE),
3509 geniCodeRValue (right, FALSE));
3512 return geniCodeRightShift (geniCodeRValue (left, FALSE),
3513 geniCodeRValue (right, FALSE));
3515 return geniCodeCast (operandType (left),
3516 geniCodeRValue (right, FALSE), FALSE);
3522 return geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3526 operand *op = geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3527 setOperandType (op, UCHARTYPE);
3538 return geniCodeLogic (geniCodeRValue (left, FALSE),
3539 geniCodeRValue (right, FALSE),
3542 return geniCodeConditional (tree,lvl);
3545 return operandFromLit (getSize (tree->right->ftype));
3549 sym_link *rtype = operandType (right);
3550 sym_link *ltype = operandType (left);
3551 if (IS_PTR (rtype) && IS_ITEMP (right)
3552 && right->isaddr && compareType (rtype->next, ltype) == 1)
3553 right = geniCodeRValue (right, TRUE);
3555 right = geniCodeRValue (right, FALSE);
3557 geniCodeAssign (left, right, 0);
3562 geniCodeAssign (left,
3563 geniCodeMultiply (geniCodeRValue (operandFromOperand (left),
3565 geniCodeRValue (right, FALSE),FALSE), 0);
3569 geniCodeAssign (left,
3570 geniCodeDivision (geniCodeRValue (operandFromOperand (left),
3572 geniCodeRValue (right, FALSE)), 0);
3575 geniCodeAssign (left,
3576 geniCodeModulus (geniCodeRValue (operandFromOperand (left),
3578 geniCodeRValue (right, FALSE)), 0);
3581 sym_link *rtype = operandType (right);
3582 sym_link *ltype = operandType (left);
3583 if (IS_PTR (rtype) && IS_ITEMP (right)
3584 && right->isaddr && compareType (rtype->next, ltype) == 1)
3585 right = geniCodeRValue (right, TRUE);
3587 right = geniCodeRValue (right, FALSE);
3590 return geniCodeAssign (left,
3591 geniCodeAdd (geniCodeRValue (operandFromOperand (left),
3597 sym_link *rtype = operandType (right);
3598 sym_link *ltype = operandType (left);
3599 if (IS_PTR (rtype) && IS_ITEMP (right)
3600 && right->isaddr && compareType (rtype->next, ltype) == 1)
3602 right = geniCodeRValue (right, TRUE);
3606 right = geniCodeRValue (right, FALSE);
3609 geniCodeAssign (left,
3610 geniCodeSubtract (geniCodeRValue (operandFromOperand (left),
3616 geniCodeAssign (left,
3617 geniCodeLeftShift (geniCodeRValue (operandFromOperand (left)
3619 geniCodeRValue (right, FALSE)), 0);
3622 geniCodeAssign (left,
3623 geniCodeRightShift (geniCodeRValue (operandFromOperand (left)
3625 geniCodeRValue (right, FALSE)), 0);
3628 geniCodeAssign (left,
3629 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3631 geniCodeRValue (right, FALSE),
3633 operandType (left)), 0);
3636 geniCodeAssign (left,
3637 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3639 geniCodeRValue (right, FALSE),
3641 operandType (left)), 0);
3644 geniCodeAssign (left,
3645 geniCodeBitwise (geniCodeRValue (operandFromOperand (left)
3647 geniCodeRValue (right, FALSE),
3649 operandType (left)), 0);
3651 return geniCodeRValue (right, FALSE);
3654 return geniCodeCall (ast2iCode (tree->left,lvl+1),
3657 geniCodeLabel (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3658 return ast2iCode (tree->right,lvl+1);
3661 geniCodeGoto (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3662 return ast2iCode (tree->right,lvl+1);
3665 geniCodeFunctionBody (tree,lvl);
3669 geniCodeReturn (right);
3673 geniCodeIfx (tree,lvl);
3677 geniCodeSwitch (tree,lvl);
3681 geniCodeInline (tree);
3685 geniCodeArrayInit(tree, ast2iCode (tree->left,lvl+1));
3692 /*-----------------------------------------------------------------*/
3693 /* reverseICChain - gets from the list and creates a linkedlist */
3694 /*-----------------------------------------------------------------*/
3701 while ((loop = getSet (&iCodeChain)))
3713 /*-----------------------------------------------------------------*/
3714 /* iCodeFromAst - given an ast will convert it to iCode */
3715 /*-----------------------------------------------------------------*/
3717 iCodeFromAst (ast * tree)
3719 returnLabel = newiTempLabel ("_return");
3720 entryLabel = newiTempLabel ("_entry");
3722 return reverseiCChain ();