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;
43 symbol *returnLabel; /* function return label */
44 symbol *entryLabel; /* function entry label */
46 /*-----------------------------------------------------------------*/
47 /* forward definition of some functions */
48 operand *geniCodeDivision (operand *, operand *);
49 operand *geniCodeAssign (operand *, operand *, int);
50 operand *geniCodeArray (operand *, operand *,int);
51 operand *geniCodeArray2Ptr (operand *);
52 operand *geniCodeRValue (operand *, bool);
53 operand *geniCodeDerefPtr (operand *,int);
54 int isLvaluereq(int lvl);
55 void setOClass (sym_link * ptr, sym_link * spec);
56 static operand *geniCodeCast (sym_link *, operand *, bool);
58 #define PRINTFUNC(x) void x (FILE *of, iCode *ic, char *s)
59 /* forward definition of ic print functions */
60 PRINTFUNC (picGetValueAtAddr);
61 PRINTFUNC (picSetValueAtAddr);
62 PRINTFUNC (picAddrOf);
63 PRINTFUNC (picGeneric);
64 PRINTFUNC (picGenericOne);
66 PRINTFUNC (picAssign);
70 PRINTFUNC (picJumpTable);
71 PRINTFUNC (picInline);
72 PRINTFUNC (picReceive);
73 PRINTFUNC (picDummyRead);
74 PRINTFUNC (picCritical);
75 PRINTFUNC (picEndCritical);
77 iCodeTable codeTable[] =
79 {'!', "not", picGenericOne, NULL},
80 {'~', "~", picGenericOne, NULL},
81 {RRC, "rrc", picGenericOne, NULL},
82 {RLC, "rlc", picGenericOne, NULL},
83 {GETHBIT, "ghbit", picGenericOne, NULL},
84 {UNARYMINUS, "-", picGenericOne, NULL},
85 {IPUSH, "push", picGenericOne, NULL},
86 {IPOP, "pop", picGenericOne, NULL},
87 {CALL, "call", picGenericOne, NULL},
88 {PCALL, "pcall", picGenericOne, NULL},
89 {FUNCTION, "proc", picGenericOne, NULL},
90 {ENDFUNCTION, "eproc", picGenericOne, NULL},
91 {RETURN, "ret", picGenericOne, NULL},
92 {'+', "+", picGeneric, NULL},
93 {'-', "-", picGeneric, NULL},
94 {'*', "*", picGeneric, NULL},
95 {'/', "/", picGeneric, NULL},
96 {'%', "%", picGeneric, NULL},
97 {'>', ">", picGeneric, NULL},
98 {'<', "<", picGeneric, NULL},
99 {LE_OP, "<=", picGeneric, NULL},
100 {GE_OP, ">=", picGeneric, NULL},
101 {EQ_OP, "==", picGeneric, NULL},
102 {NE_OP, "!=", picGeneric, NULL},
103 {AND_OP, "&&", picGeneric, NULL},
104 {OR_OP, "||", picGeneric, NULL},
105 {'^', "^", picGeneric, NULL},
106 {'|', "|", picGeneric, NULL},
107 {BITWISEAND, "&", picGeneric, NULL},
108 {LEFT_OP, "<<", picGeneric, NULL},
109 {RIGHT_OP, ">>", picGeneric, NULL},
110 {GET_VALUE_AT_ADDRESS, "@", picGetValueAtAddr, NULL},
111 {ADDRESS_OF, "&", picAddrOf, NULL},
112 {CAST, "<>", picCast, NULL},
113 {'=', ":=", picAssign, NULL},
114 {LABEL, "", picLabel, NULL},
115 {GOTO, "", picGoto, NULL},
116 {JUMPTABLE, "jtab", picJumpTable, NULL},
117 {IFX, "if", picIfx, NULL},
118 {INLINEASM, "", picInline, NULL},
119 {RECEIVE, "recv", picReceive, NULL},
120 {SEND, "send", picGenericOne, NULL},
121 {ARRAYINIT, "arrayInit", picGenericOne, NULL},
122 {DUMMY_READ_VOLATILE, "dummy = (volatile)", picDummyRead, NULL},
123 {CRITICAL, "critical_start", picCritical, NULL},
124 {ENDCRITICAL, "critical_end", picEndCritical, NULL}
127 /*-----------------------------------------------------------------*/
128 /* checkConstantRange: check a constant against the type */
129 /*-----------------------------------------------------------------*/
132 /* pedantic=0: allmost anything is allowed as long as the absolute
133 value is within the bit range of the type, and -1 is treated as
134 0xf..f for unsigned types (e.g. in assign)
135 pedantic=1: -1==-1, not allowed for unsigned types (e.g. in compare)
136 pedantic>1: "char c=200" is not allowed (evaluates to -56)
139 void checkConstantRange(sym_link *ltype, value *val, char *msg,
146 max = pow ((double)2.0, (double)bitsForType(ltype));
148 if (IS_LONG(val->type)) {
149 if (IS_UNSIGNED(val->type)) {
150 v=SPEC_CVAL(val->type).v_ulong;
152 v=SPEC_CVAL(val->type).v_long;
155 if (IS_UNSIGNED(val->type)) {
156 v=SPEC_CVAL(val->type).v_uint;
158 v=SPEC_CVAL(val->type).v_int;
164 // this could be a good idea
165 if (options.pedantic)
169 if (IS_FLOAT(ltype)) {
174 if (!IS_UNSIGNED(val->type) && v<0) {
176 if (IS_UNSIGNED(ltype) && (pedantic>1)) {
182 // if very pedantic: "char c=200" is not allowed
183 if (pedantic>1 && !IS_UNSIGNED(ltype)) {
184 max = max/2 + negative;
191 #if 0 // temporary disabled, leaving the warning as a reminder
193 SNPRINTF (message, sizeof(message), "for %s %s in %s",
194 IS_UNSIGNED(ltype) ? "unsigned" : "signed",
195 nounName(ltype), msg);
196 werror (W_CONST_RANGE, message);
204 /*-----------------------------------------------------------------*/
205 /* operandName - returns the name of the operand */
206 /*-----------------------------------------------------------------*/
208 printOperand (operand * op, FILE * file)
225 opetype = getSpec (operandType (op));
226 if (IS_FLOAT (opetype))
227 fprintf (file, "%g {", SPEC_CVAL (opetype).v_float);
229 fprintf (file, "0x%x {", (unsigned) floatFromVal (op->operand.valOperand));
230 printTypeChain (operandType (op), file);
237 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}" , */
238 (OP_SYMBOL (op)->rname[0] ? OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name),
240 OP_LIVEFROM (op), OP_LIVETO (op),
241 OP_SYMBOL (op)->stack,
242 op->isaddr, OP_SYMBOL (op)->isreqv,
243 OP_SYMBOL (op)->remat,OP_SYMBOL(op)->noSpilLoc,
244 OP_SYMBOL(op)->ruonly,OP_SYMBOL(op)->dptr
248 printTypeChain (operandType (op), file);
249 if (SPIL_LOC (op) && IS_ITEMP (op))
250 fprintf (file, "}{ sir@ %s", SPIL_LOC (op)->rname);
255 /* if assigned to registers */
256 if (OP_SYMBOL (op)->nRegs)
258 if (OP_SYMBOL (op)->isspilt)
260 if (!OP_SYMBOL (op)->remat)
261 if (OP_SYMBOL (op)->usl.spillLoc)
262 fprintf (file, "[%s]", (OP_SYMBOL (op)->usl.spillLoc->rname[0] ?
263 OP_SYMBOL (op)->usl.spillLoc->rname :
264 OP_SYMBOL (op)->usl.spillLoc->name));
266 fprintf (file, "[err]");
268 fprintf (file, "[remat]");
274 for (i = 0; i < OP_SYMBOL (op)->nRegs; i++)
275 fprintf (file, "%s ", port->getRegName (OP_SYMBOL (op)->regs[i]));
280 fprintf (file, "%s", (OP_SYMBOL (op)->rname[0] ?
281 OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name));
282 /* if assigned to registers */
283 if (OP_SYMBOL (op)->nRegs && !OP_SYMBOL (op)->isspilt)
287 for (i = 0; i < OP_SYMBOL (op)->nRegs; i++)
288 fprintf (file, "%s ", (OP_SYMBOL (op)->regs[i] ?
289 OP_SYMBOL (op)->regs[i]->name :
298 printTypeChain (op->operand.typeOperand, file);
304 fprintf (file, "\n");
309 /*-----------------------------------------------------------------*/
310 /* print functions */
311 /*-----------------------------------------------------------------*/
312 PRINTFUNC (picGetValueAtAddr)
315 printOperand (IC_RESULT (ic), of);
318 printOperand (IC_LEFT (ic), of);
324 PRINTFUNC (picSetValueAtAddr)
328 printOperand (IC_LEFT (ic), of);
329 fprintf (of, "] = ");
330 printOperand (IC_RIGHT (ic), of);
334 PRINTFUNC (picAddrOf)
337 printOperand (IC_RESULT (ic), of);
338 if (IS_ITEMP (IC_LEFT (ic)))
341 fprintf (of, " = &[");
342 printOperand (IC_LEFT (ic), of);
345 if (IS_ITEMP (IC_LEFT (ic)))
346 fprintf (of, " offsetAdd ");
349 printOperand (IC_RIGHT (ic), of);
351 if (IS_ITEMP (IC_LEFT (ic)))
357 PRINTFUNC (picJumpTable)
362 fprintf (of, "%s\t", s);
363 printOperand (IC_JTCOND (ic), of);
365 for (sym = setFirstItem (IC_JTLABELS (ic)); sym;
366 sym = setNextItem (IC_JTLABELS (ic)))
367 fprintf (of, "\t\t\t%s\n", sym->name);
370 PRINTFUNC (picGeneric)
373 printOperand (IC_RESULT (ic), of);
375 printOperand (IC_LEFT (ic), of);
376 fprintf (of, " %s ", s);
377 printOperand (IC_RIGHT (ic), of);
381 PRINTFUNC (picGenericOne)
386 printOperand (IC_RESULT (ic), of);
392 fprintf (of, "%s ", s);
393 printOperand (IC_LEFT (ic), of);
396 if (!IC_RESULT (ic) && !IC_LEFT (ic))
399 if (ic->op == SEND || ic->op == RECEIVE) {
400 fprintf(of,"{argreg = %d}",ic->argreg);
408 printOperand (IC_RESULT (ic), of);
410 printOperand (IC_LEFT (ic), of);
411 printOperand (IC_RIGHT (ic), of);
416 PRINTFUNC (picAssign)
420 if (IC_RESULT (ic)->isaddr && IS_ITEMP (IC_RESULT (ic)))
423 printOperand (IC_RESULT (ic), of);
425 if (IC_RESULT (ic)->isaddr && IS_ITEMP (IC_RESULT (ic)))
428 fprintf (of, " %s ", s);
429 printOperand (IC_RIGHT (ic), of);
436 fprintf (of, " %s($%d) :\n", IC_LABEL (ic)->name, IC_LABEL (ic)->key);
442 fprintf (of, " goto %s($%d)\n", IC_LABEL (ic)->name, IC_LABEL (ic)->key);
449 printOperand (IC_COND (ic), of);
452 fprintf (of, " == 0 goto %s($%d)\n", IC_FALSE (ic)->name, IC_FALSE (ic)->key);
455 fprintf (of, " != 0 goto %s($%d)\n", IC_TRUE (ic)->name, IC_TRUE (ic)->key);
457 fprintf (of, "\tzzgoto %s\n", IC_FALSE (ic)->name);
461 PRINTFUNC (picInline)
463 fprintf (of, "%s", IC_INLINE (ic));
466 PRINTFUNC (picReceive)
468 printOperand (IC_RESULT (ic), of);
469 fprintf (of, " = %s ", s);
470 printOperand (IC_LEFT (ic), of);
474 PRINTFUNC (picDummyRead)
477 fprintf (of, "%s ", s);
478 printOperand (IC_RIGHT (ic), of);
482 PRINTFUNC (picCritical)
486 printOperand (IC_RESULT (ic), of);
488 fprintf (of, "(stack)");
489 fprintf (of, " = %s ", s);
493 PRINTFUNC (picEndCritical)
496 fprintf (of, "%s = ", s);
498 printOperand (IC_RIGHT (ic), of);
500 fprintf (of, "(stack)");
504 /*-----------------------------------------------------------------*/
505 /* piCode - prints one iCode */
506 /*-----------------------------------------------------------------*/
508 piCode (void *item, FILE * of)
516 icTab = getTableEntry (ic->op);
517 fprintf (stdout, "%s(%d:%d:%d:%d:%d)\t",
518 ic->filename, ic->lineno,
519 ic->seq, ic->key, ic->depth, ic->supportRtn);
520 icTab->iCodePrint (of, ic, icTab->printName);
526 printiCChain(ic,stdout);
528 /*-----------------------------------------------------------------*/
529 /* printiCChain - prints intermediate code for humans */
530 /*-----------------------------------------------------------------*/
532 printiCChain (iCode * icChain, FILE * of)
539 for (loop = icChain; loop; loop = loop->next)
541 if ((icTab = getTableEntry (loop->op)))
543 fprintf (of, "%s(l%d:s%d:k%d:d%d:s%d)\t",
544 loop->filename, loop->lineno,
545 loop->seq, loop->key, loop->depth, loop->supportRtn);
547 icTab->iCodePrint (of, loop, icTab->printName);
553 /*-----------------------------------------------------------------*/
554 /* newOperand - allocate, init & return a new iCode */
555 /*-----------------------------------------------------------------*/
561 op = Safe_alloc ( sizeof (operand));
567 /*-----------------------------------------------------------------*/
568 /* newiCode - create and return a new iCode entry initialised */
569 /*-----------------------------------------------------------------*/
571 newiCode (int op, operand * left, operand * right)
575 ic = Safe_alloc ( sizeof (iCode));
577 ic->seqPoint = seqPoint;
579 ic->filename = filename;
581 ic->level = scopeLevel;
583 ic->key = iCodeKey++;
585 IC_RIGHT (ic) = right;
590 /*-----------------------------------------------------------------*/
591 /* newiCode for conditional statements */
592 /*-----------------------------------------------------------------*/
594 newiCodeCondition (operand * condition,
600 if (IS_VOID(operandType(condition))) {
601 werror(E_VOID_VALUE_USED);
604 ic = newiCode (IFX, NULL, NULL);
605 IC_COND (ic) = condition;
606 IC_TRUE (ic) = trueLabel;
607 IC_FALSE (ic) = falseLabel;
611 /*-----------------------------------------------------------------*/
612 /* newiCodeLabelGoto - unconditional goto statement| label stmnt */
613 /*-----------------------------------------------------------------*/
615 newiCodeLabelGoto (int op, symbol * label)
619 ic = newiCode (op, NULL, NULL);
623 IC_RIGHT (ic) = NULL;
624 IC_RESULT (ic) = NULL;
628 /*-----------------------------------------------------------------*/
629 /* newiTemp - allocate & return a newItemp Variable */
630 /*-----------------------------------------------------------------*/
638 SNPRINTF (buffer, sizeof(buffer), "%s", s);
642 SNPRINTF (buffer, sizeof(buffer), "iTemp%d", iTempNum++);
645 itmp = newSymbol (buffer, 1);
646 strncpyz (itmp->rname, itmp->name, SDCC_NAME_MAX);
652 /*-----------------------------------------------------------------*/
653 /* newiTempLabel - creates a temp variable label */
654 /*-----------------------------------------------------------------*/
656 newiTempLabel (char *s)
660 /* check if this alredy exists */
661 if (s && (itmplbl = findSym (LabelTab, NULL, s)))
666 itmplbl = newSymbol (s, 1);
670 SNPRINTF (buffer, sizeof(buffer), "iTempLbl%d", iTempLblNum++);
671 itmplbl = newSymbol (buffer, 1);
676 itmplbl->key = labelKey++;
677 addSym (LabelTab, itmplbl, itmplbl->name, 0, 0, 0);
681 /*-----------------------------------------------------------------*/
682 /* newiTempPreheaderLabel - creates a new preheader label */
683 /*-----------------------------------------------------------------*/
685 newiTempPreheaderLabel ()
689 SNPRINTF (buffer, sizeof(buffer), "preHeaderLbl%d", iTempLblNum++);
690 itmplbl = newSymbol (buffer, 1);
694 itmplbl->key = labelKey++;
695 addSym (LabelTab, itmplbl, itmplbl->name, 0, 0, 0);
700 /*-----------------------------------------------------------------*/
701 /* initiCode - initialises some iCode related stuff */
702 /*-----------------------------------------------------------------*/
709 /*-----------------------------------------------------------------*/
710 /* copyiCode - make a copy of the iCode given */
711 /*-----------------------------------------------------------------*/
713 copyiCode (iCode * ic)
715 iCode *nic = newiCode (ic->op, NULL, NULL);
717 nic->lineno = ic->lineno;
718 nic->filename = ic->filename;
719 nic->block = ic->block;
720 nic->level = ic->level;
721 nic->parmBytes = ic->parmBytes;
723 /* deal with the special cases first */
727 IC_COND (nic) = operandFromOperand (IC_COND (ic));
728 IC_TRUE (nic) = IC_TRUE (ic);
729 IC_FALSE (nic) = IC_FALSE (ic);
733 IC_JTCOND (nic) = operandFromOperand (IC_JTCOND (ic));
734 IC_JTLABELS (nic) = IC_JTLABELS (ic);
739 IC_RESULT (nic) = operandFromOperand (IC_RESULT (ic));
740 IC_LEFT (nic) = operandFromOperand (IC_LEFT (ic));
744 IC_INLINE (nic) = IC_INLINE (ic);
748 IC_ARRAYILIST(nic) = IC_ARRAYILIST(ic);
752 IC_RESULT (nic) = operandFromOperand (IC_RESULT (ic));
753 IC_LEFT (nic) = operandFromOperand (IC_LEFT (ic));
754 IC_RIGHT (nic) = operandFromOperand (IC_RIGHT (ic));
760 /*-----------------------------------------------------------------*/
761 /* getTableEntry - gets the table entry for the given operator */
762 /*-----------------------------------------------------------------*/
764 getTableEntry (int oper)
768 for (i = 0; i < (sizeof (codeTable) / sizeof (iCodeTable)); i++)
769 if (oper == codeTable[i].icode)
770 return &codeTable[i];
775 /*-----------------------------------------------------------------*/
776 /* newiTempOperand - new intermediate temp operand */
777 /*-----------------------------------------------------------------*/
779 newiTempOperand (sym_link * type, char throwType)
782 operand *op = newOperand ();
786 itmp = newiTemp (NULL);
788 etype = getSpec (type);
790 if (IS_LITERAL (etype))
793 /* copy the type information */
795 itmp->etype = getSpec (itmp->type = (throwType ? type :
796 copyLinkChain (type)));
797 if (IS_LITERAL (itmp->etype))
799 SPEC_SCLS (itmp->etype) = S_REGISTER;
800 SPEC_OCLS (itmp->etype) = reg;
803 op->operand.symOperand = itmp;
804 op->key = itmp->key = ++operandKey;
808 /*-----------------------------------------------------------------*/
809 /* operandType - returns the type chain for an operand */
810 /*-----------------------------------------------------------------*/
812 operandType (operand * op)
814 /* depending on type of operand */
819 return op->operand.valOperand->type;
822 return op->operand.symOperand->type;
825 return op->operand.typeOperand;
827 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
828 " operand type not known ");
829 assert (0); /* should never come here */
830 /* Just to keep the compiler happy */
831 return (sym_link *) 0;
835 /*-----------------------------------------------------------------*/
836 /* isParamterToCall - will return 1 if op is a parameter to args */
837 /*-----------------------------------------------------------------*/
839 isParameterToCall (value * args, operand * op)
843 wassert (IS_SYMOP(op));
848 isSymbolEqual (op->operand.symOperand, tval->sym))
855 /*-----------------------------------------------------------------*/
856 /* isOperandGlobal - return 1 if operand is a global variable */
857 /*-----------------------------------------------------------------*/
859 isOperandGlobal (operand * op)
868 (op->operand.symOperand->level == 0 ||
869 IS_STATIC (op->operand.symOperand->etype) ||
870 IS_EXTERN (op->operand.symOperand->etype))
877 /*-----------------------------------------------------------------*/
878 /* isOperandVolatile - return 1 if the operand is volatile */
879 /*-----------------------------------------------------------------*/
881 isOperandVolatile (operand * op, bool chkTemp)
886 if (IS_ITEMP (op) && !chkTemp)
889 opetype = getSpec (optype = operandType (op));
891 if (IS_PTR (optype) && DCL_PTR_VOLATILE (optype))
894 if (IS_VOLATILE (opetype))
899 /*-----------------------------------------------------------------*/
900 /* isOperandLiteral - returns 1 if an operand contains a literal */
901 /*-----------------------------------------------------------------*/
903 isOperandLiteral (operand * op)
910 opetype = getSpec (operandType (op));
912 if (IS_LITERAL (opetype))
918 /*-----------------------------------------------------------------*/
919 /* isOperandInFarSpace - will return true if operand is in farSpace */
920 /*-----------------------------------------------------------------*/
922 isOperandInFarSpace (operand * op)
932 if (!IS_TRUE_SYMOP (op))
935 etype = SPIL_LOC (op)->etype;
941 etype = getSpec (operandType (op));
943 return (IN_FARSPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
946 /*------------------------------------------------------------------*/
947 /* isOperandInDirSpace - will return true if operand is in dirSpace */
948 /*------------------------------------------------------------------*/
950 isOperandInDirSpace (operand * op)
960 if (!IS_TRUE_SYMOP (op))
963 etype = SPIL_LOC (op)->etype;
969 etype = getSpec (operandType (op));
971 return (IN_DIRSPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
974 /*--------------------------------------------------------------------*/
975 /* isOperandInCodeSpace - will return true if operand is in codeSpace */
976 /*--------------------------------------------------------------------*/
978 isOperandInCodeSpace (operand * op)
988 etype = getSpec (operandType (op));
990 if (!IS_TRUE_SYMOP (op))
993 etype = SPIL_LOC (op)->etype;
999 etype = getSpec (operandType (op));
1001 return (IN_CODESPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
1004 /*-----------------------------------------------------------------*/
1005 /* isOperandOnStack - will return true if operand is on stack */
1006 /*-----------------------------------------------------------------*/
1008 isOperandOnStack (operand * op)
1018 etype = getSpec (operandType (op));
1019 if (IN_STACK (etype) ||
1020 OP_SYMBOL(op)->onStack ||
1021 (SPIL_LOC(op) && SPIL_LOC(op)->onStack))
1027 /*-----------------------------------------------------------------*/
1028 /* isOclsExpensive - will return true if accesses to an output */
1029 /* storage class are expensive */
1030 /*-----------------------------------------------------------------*/
1032 isOclsExpensive (struct memmap *oclass)
1034 if (port->oclsExpense)
1035 return port->oclsExpense (oclass) > 0;
1037 /* In the absence of port specific guidance, assume only */
1038 /* farspace is expensive. */
1039 return IN_FARSPACE (oclass);
1042 /*-----------------------------------------------------------------*/
1043 /* operandLitValue - literal value of an operand */
1044 /*-----------------------------------------------------------------*/
1046 operandLitValue (operand * op)
1048 assert (isOperandLiteral (op));
1050 return floatFromVal (op->operand.valOperand);
1053 /*-----------------------------------------------------------------*/
1054 /* getBuiltInParms - returns parameters to a builtin functions */
1055 /*-----------------------------------------------------------------*/
1056 iCode *getBuiltinParms (iCode *ic, int *pcount, operand **parms)
1061 /* builtin functions uses only SEND for parameters */
1062 while (ic->op != CALL) {
1063 assert(ic->op == SEND && ic->builtinSEND);
1064 ic->generated = 1; /* mark the icode as generated */
1065 parms[*pcount] = IC_LEFT(ic);
1071 /* make sure this is a builtin function call */
1072 assert(IS_SYMOP(IC_LEFT(ic)));
1073 ftype = operandType(IC_LEFT(ic));
1074 assert(IFFUNC_ISBUILTIN(ftype));
1078 /*-----------------------------------------------------------------*/
1079 /* operandOperation - performs operations on operands */
1080 /*-----------------------------------------------------------------*/
1082 operandOperation (operand * left, operand * right,
1083 int op, sym_link * type)
1085 sym_link *let , *ret=NULL;
1086 operand *retval = (operand *) 0;
1088 assert (isOperandLiteral (left));
1089 let = getSpec(operandType(left));
1091 assert (isOperandLiteral (right));
1092 ret = getSpec(operandType(right));
1098 retval = operandFromValue (valCastLiteral (type,
1099 operandLitValue (left) +
1100 operandLitValue (right)));
1103 retval = operandFromValue (valCastLiteral (type,
1104 operandLitValue (left) -
1105 operandLitValue (right)));
1109 retval = operandFromValue (valCastLiteral (type,
1110 operandLitValue (left) *
1111 operandLitValue (right)));
1112 This could be all we've to do, but with gcc we've to take care about
1113 overflows. Two examples:
1114 ULONG_MAX * ULONG_MAX doesn't fit into a double, some of the least
1115 significant bits are lost (52 in fraction, 63 bits would be
1116 necessary to keep full precision).
1117 If the resulting double value is greater than ULONG_MAX (resp.
1118 USHRT_MAX, ...), then 0 will be assigned to v_ulong (resp. u_uint, ...)!
1121 /* if it is not a specifier then we can assume that */
1122 /* it will be an unsigned long */
1123 if (IS_INT (type) ||
1126 /* long is handled here, because it can overflow with double */
1127 if (IS_LONG (type) ||
1129 /* signed and unsigned mul are the same, as long as the precision
1130 of the result isn't bigger than the precision of the operands. */
1131 retval = operandFromValue (valCastLiteral (type,
1132 (TYPE_UDWORD) operandLitValue (left) *
1133 (TYPE_UDWORD) operandLitValue (right)));
1134 else if (IS_UNSIGNED (type)) /* unsigned int */
1136 /* unsigned int is handled here in order to detect overflow */
1137 TYPE_UDWORD ul = (TYPE_UWORD) operandLitValue (left) *
1138 (TYPE_UWORD) operandLitValue (right);
1140 retval = operandFromValue (valCastLiteral (type, (TYPE_UWORD) ul));
1141 if (ul != (TYPE_UWORD) ul)
1144 else /* signed int */
1146 /* signed int is handled here in order to detect overflow */
1147 TYPE_DWORD l = (TYPE_WORD) operandLitValue (left) *
1148 (TYPE_WORD) operandLitValue (right);
1150 retval = operandFromValue (valCastLiteral (type, (TYPE_WORD) l));
1151 if (l != (TYPE_WORD) l)
1156 /* all others go here: */
1157 retval = operandFromValue (valCastLiteral (type,
1158 operandLitValue (left) *
1159 operandLitValue (right)));
1162 if ((TYPE_UDWORD) operandLitValue (right) == 0)
1164 werror (E_DIVIDE_BY_ZERO);
1170 if (IS_UNSIGNED (type))
1172 SPEC_USIGN (let) = 1;
1173 SPEC_USIGN (ret) = 1;
1174 retval = operandFromValue (valCastLiteral (type,
1175 (TYPE_UDWORD) operandLitValue (left) /
1176 (TYPE_UDWORD) operandLitValue (right)));
1180 retval = operandFromValue (valCastLiteral (type,
1181 operandLitValue (left) /
1182 operandLitValue (right)));
1187 if ((TYPE_UDWORD) operandLitValue (right) == 0)
1189 werror (E_DIVIDE_BY_ZERO);
1194 if (IS_UNSIGNED (type))
1195 retval = operandFromLit ((TYPE_UDWORD) operandLitValue (left) %
1196 (TYPE_UDWORD) operandLitValue (right));
1198 retval = operandFromLit ((TYPE_DWORD) operandLitValue (left) %
1199 (TYPE_DWORD) operandLitValue (right));
1203 /* The number of left shifts is always unsigned. Signed doesn't make
1204 sense here. Shifting by a negative number is impossible. */
1205 retval = operandFromValue (valCastLiteral (type,
1206 ((TYPE_UDWORD) operandLitValue (left) <<
1207 (TYPE_UDWORD) operandLitValue (right))));
1210 /* The number of right shifts is always unsigned. Signed doesn't make
1211 sense here. Shifting by a negative number is impossible. */
1212 if (IS_UNSIGNED(let))
1213 /* unsigned: logic shift right */
1214 retval = operandFromLit ((TYPE_UDWORD) operandLitValue (left) >>
1215 (TYPE_UDWORD) operandLitValue (right));
1217 /* signed: arithmetic shift right */
1218 retval = operandFromLit ((TYPE_DWORD ) operandLitValue (left) >>
1219 (TYPE_UDWORD) operandLitValue (right));
1222 /* this op doesn't care about signedness */
1226 l = (TYPE_UDWORD) operandLitValue (left);
1227 if (IS_CHAR(OP_VALUE(left)->type))
1229 else if (!IS_LONG (OP_VALUE(left)->type))
1231 r = (TYPE_UDWORD) operandLitValue (right);
1232 if (IS_CHAR(OP_VALUE(right)->type))
1234 else if (!IS_LONG (OP_VALUE(right)->type))
1236 retval = operandFromLit (l == r);
1240 retval = operandFromLit (operandLitValue (left) <
1241 operandLitValue (right));
1244 retval = operandFromLit (operandLitValue (left) <=
1245 operandLitValue (right));
1248 retval = operandFromLit (operandLitValue (left) !=
1249 operandLitValue (right));
1252 retval = operandFromLit (operandLitValue (left) >
1253 operandLitValue (right));
1256 retval = operandFromLit (operandLitValue (left) >=
1257 operandLitValue (right));
1260 retval = operandFromValue (valCastLiteral (type,
1261 (TYPE_UDWORD)operandLitValue(left) &
1262 (TYPE_UDWORD)operandLitValue(right)));
1265 retval = operandFromValue (valCastLiteral (type,
1266 (TYPE_UDWORD)operandLitValue(left) |
1267 (TYPE_UDWORD)operandLitValue(right)));
1270 retval = operandFromValue (valCastLiteral (type,
1271 (TYPE_UDWORD)operandLitValue(left) ^
1272 (TYPE_UDWORD)operandLitValue(right)));
1275 retval = operandFromLit (operandLitValue (left) &&
1276 operandLitValue (right));
1279 retval = operandFromLit (operandLitValue (left) ||
1280 operandLitValue (right));
1284 TYPE_UDWORD i = (TYPE_UDWORD) operandLitValue (left);
1286 retval = operandFromLit ((i >> (getSize (operandType (left)) * 8 - 1)) |
1292 TYPE_UDWORD i = (TYPE_UDWORD) operandLitValue (left);
1294 retval = operandFromLit ((i << (getSize (operandType (left)) * 8 - 1)) |
1300 retval = operandFromValue (valCastLiteral (type,
1301 -1 * operandLitValue (left)));
1305 retval = operandFromLit (~((TYPE_UDWORD) operandLitValue (left)));
1309 retval = operandFromLit (!operandLitValue (left));
1313 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1314 " operandOperation invalid operator ");
1322 /*-----------------------------------------------------------------*/
1323 /* isOperandEqual - compares two operand & return 1 if they r = */
1324 /*-----------------------------------------------------------------*/
1326 isOperandEqual (operand * left, operand * right)
1328 /* if the pointers are equal then they are equal */
1332 /* if either of them null then false */
1333 if (!left || !right)
1336 if (left->type != right->type)
1339 if (IS_SYMOP (left) && IS_SYMOP (right))
1340 return left->key == right->key;
1342 /* if types are the same */
1346 return isSymbolEqual (left->operand.symOperand,
1347 right->operand.symOperand);
1349 return (floatFromVal (left->operand.valOperand) ==
1350 floatFromVal (right->operand.valOperand));
1352 if (compareType (left->operand.typeOperand,
1353 right->operand.typeOperand) == 1)
1360 /*-------------------------------------------------------------------*/
1361 /* isiCodeEqual - compares two iCodes are equal, returns true if yes */
1362 /*-------------------------------------------------------------------*/
1364 isiCodeEqual (iCode * left, iCode * right)
1366 /* if the same pointer */
1370 /* if either of them null */
1371 if (!left || !right)
1374 /* if operand are the same */
1375 if (left->op == right->op)
1378 /* compare all the elements depending on type */
1379 if (left->op != IFX)
1381 if (!isOperandEqual (IC_LEFT (left), IC_LEFT (right)))
1383 if (!isOperandEqual (IC_RIGHT (left), IC_RIGHT (right)))
1389 if (!isOperandEqual (IC_COND (left), IC_COND (right)))
1391 if (!isSymbolEqual (IC_TRUE (left), IC_TRUE (right)))
1393 if (!isSymbolEqual (IC_FALSE (left), IC_FALSE (right)))
1402 /*-----------------------------------------------------------------*/
1403 /* newiTempFromOp - create a temp Operand with same attributes */
1404 /*-----------------------------------------------------------------*/
1406 newiTempFromOp (operand * op)
1416 nop = newiTempOperand (operandType (op), TRUE);
1417 nop->isaddr = op->isaddr;
1418 nop->isvolatile = op->isvolatile;
1419 nop->isGlobal = op->isGlobal;
1420 nop->isLiteral = op->isLiteral;
1421 nop->usesDefs = op->usesDefs;
1422 nop->isParm = op->isParm;
1426 /*-----------------------------------------------------------------*/
1427 /* operand from operand - creates an operand holder for the type */
1428 /*-----------------------------------------------------------------*/
1430 operandFromOperand (operand * op)
1436 nop = newOperand ();
1437 nop->type = op->type;
1438 nop->isaddr = op->isaddr;
1440 nop->isvolatile = op->isvolatile;
1441 nop->isGlobal = op->isGlobal;
1442 nop->isLiteral = op->isLiteral;
1443 nop->usesDefs = op->usesDefs;
1444 nop->isParm = op->isParm;
1449 nop->operand.symOperand = op->operand.symOperand;
1452 nop->operand.valOperand = op->operand.valOperand;
1455 nop->operand.typeOperand = op->operand.typeOperand;
1462 /*-----------------------------------------------------------------*/
1463 /* opFromOpWithDU - makes a copy of the operand and DU chains */
1464 /*-----------------------------------------------------------------*/
1466 opFromOpWithDU (operand * op, bitVect * defs, bitVect * uses)
1468 operand *nop = operandFromOperand (op);
1470 if (nop->type == SYMBOL)
1472 OP_SYMBOL (nop)->defs = bitVectCopy (defs);
1473 OP_SYMBOL (nop)->uses = bitVectCopy (uses);
1479 /*-----------------------------------------------------------------*/
1480 /* operandFromSymbol - creates an operand from a symbol */
1481 /*-----------------------------------------------------------------*/
1483 operandFromSymbol (symbol * sym)
1488 /* if the symbol's type is a literal */
1489 /* then it is an enumerator type */
1490 if (IS_LITERAL (sym->etype) && SPEC_ENUM (sym->etype))
1491 return operandFromValue (valFromType (sym->etype));
1494 sym->key = ++operandKey;
1496 /* if this an implicit variable, means struct/union */
1497 /* member so just return it */
1498 if (sym->implicit || IS_FUNC (sym->type))
1502 op->operand.symOperand = sym;
1504 op->isvolatile = isOperandVolatile (op, TRUE);
1505 op->isGlobal = isOperandGlobal (op);
1509 /* under the following conditions create a
1510 register equivalent for a local symbol */
1511 if (sym->level && sym->etype && SPEC_OCLS (sym->etype) &&
1512 (IN_FARSPACE (SPEC_OCLS (sym->etype)) &&
1514 (!(options.model == MODEL_FLAT24)) ) &&
1515 options.stackAuto == 0)
1518 if (!IS_AGGREGATE (sym->type) && /* not an aggregate */
1519 !IS_FUNC (sym->type) && /* not a function */
1520 !sym->_isparm && /* not a parameter */
1521 sym->level && /* is a local variable */
1522 !sym->addrtaken && /* whose address has not been taken */
1523 !sym->reqv && /* does not already have a reg equivalence */
1524 !IS_VOLATILE (sym->etype) && /* not declared as volatile */
1525 !IS_STATIC (sym->etype) && /* and not declared static */
1526 !sym->islbl && /* not a label */
1527 ok && /* farspace check */
1528 !IS_BITVAR (sym->etype) /* not a bit variable */
1532 /* we will use it after all optimizations
1533 and before liveRange calculation */
1534 sym->reqv = newiTempOperand (sym->type, 0);
1535 sym->reqv->key = sym->key;
1536 OP_SYMBOL (sym->reqv)->key = sym->key;
1537 OP_SYMBOL (sym->reqv)->isreqv = 1;
1538 OP_SYMBOL (sym->reqv)->islocal = 1;
1539 OP_SYMBOL (sym->reqv)->onStack = sym->onStack;
1540 SPIL_LOC (sym->reqv) = sym;
1543 if (!IS_AGGREGATE (sym->type))
1547 op->operand.symOperand = sym;
1550 op->isvolatile = isOperandVolatile (op, TRUE);
1551 op->isGlobal = isOperandGlobal (op);
1552 op->isPtr = IS_PTR (operandType (op));
1553 op->isParm = sym->_isparm;
1558 /* itemp = &[_symbol] */
1560 ic = newiCode (ADDRESS_OF, newOperand (), NULL);
1561 IC_LEFT (ic)->type = SYMBOL;
1562 IC_LEFT (ic)->operand.symOperand = sym;
1563 IC_LEFT (ic)->key = sym->key;
1564 (IC_LEFT (ic))->isvolatile = isOperandVolatile (IC_LEFT (ic), TRUE);
1565 (IC_LEFT (ic))->isGlobal = isOperandGlobal (IC_LEFT (ic));
1566 IC_LEFT (ic)->isPtr = IS_PTR (operandType (IC_LEFT (ic)));
1569 IC_RESULT (ic) = newiTempOperand (sym->type, 0);
1570 if (IS_ARRAY (sym->type))
1572 IC_RESULT (ic) = geniCodeArray2Ptr (IC_RESULT (ic));
1573 IC_RESULT (ic)->isaddr = 0;
1576 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (sym->type));
1580 return IC_RESULT (ic);
1583 /*-----------------------------------------------------------------*/
1584 /* operandFromValue - creates an operand from value */
1585 /*-----------------------------------------------------------------*/
1587 operandFromValue (value * val)
1591 /* if this is a symbol then do the symbol thing */
1593 return operandFromSymbol (val->sym);
1595 /* this is not a symbol */
1598 op->operand.valOperand = val;
1599 op->isLiteral = isOperandLiteral (op);
1603 /*-----------------------------------------------------------------*/
1604 /* operandFromLink - operand from typeChain */
1605 /*-----------------------------------------------------------------*/
1607 operandFromLink (sym_link * type)
1611 /* operand from sym_link */
1617 op->operand.typeOperand = copyLinkChain (type);
1621 /*-----------------------------------------------------------------*/
1622 /* operandFromLit - makes an operand from a literal value */
1623 /*-----------------------------------------------------------------*/
1625 operandFromLit (double i)
1627 return operandFromValue (valueFromLit (i));
1630 /*-----------------------------------------------------------------*/
1631 /* operandFromAst - creates an operand from an ast */
1632 /*-----------------------------------------------------------------*/
1634 operandFromAst (ast * tree,int lvl)
1640 /* depending on type do */
1644 return ast2iCode (tree,lvl+1);
1648 return operandFromValue (tree->opval.val);
1652 return operandFromLink (tree->opval.lnk);
1659 /* Just to keep the compiler happy */
1660 return (operand *) 0;
1663 /*-----------------------------------------------------------------*/
1664 /* setOperandType - sets the operand's type to the given type */
1665 /*-----------------------------------------------------------------*/
1667 setOperandType (operand * op, sym_link * type)
1669 /* depending on the type of operand */
1674 op->operand.valOperand->etype =
1675 getSpec (op->operand.valOperand->type =
1676 copyLinkChain (type));
1680 if (op->operand.symOperand->isitmp)
1681 op->operand.symOperand->etype =
1682 getSpec (op->operand.symOperand->type =
1683 copyLinkChain (type));
1685 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1686 "attempt to modify type of source");
1690 op->operand.typeOperand = copyLinkChain (type);
1695 /*-----------------------------------------------------------------*/
1696 /* Get size in byte of ptr need to access an array */
1697 /*-----------------------------------------------------------------*/
1699 getArraySizePtr (operand * op)
1701 sym_link *ltype = operandType(op);
1705 int size = getSize(ltype);
1706 return(IS_GENPTR(ltype)?(size-1):size);
1711 sym_link *letype = getSpec(ltype);
1712 switch (PTR_TYPE (SPEC_OCLS (letype)))
1724 return (GPTRSIZE-1);
1733 /*-----------------------------------------------------------------*/
1734 /* perform "usual unary conversions" */
1735 /*-----------------------------------------------------------------*/
1738 usualUnaryConversions (operand * op)
1740 if (IS_INTEGRAL (operandType (op)))
1742 if (getSize (operandType (op)) < (unsigned int) INTSIZE)
1745 return geniCodeCast (INTTYPE, op, TRUE);
1752 /*-----------------------------------------------------------------*/
1753 /* perform "usual binary conversions" */
1754 /*-----------------------------------------------------------------*/
1756 usualBinaryConversions (operand ** op1, operand ** op2,
1757 bool promoteCharToInt, bool isMul)
1760 sym_link *rtype = operandType (*op2);
1761 sym_link *ltype = operandType (*op1);
1763 ctype = computeType (ltype, rtype, promoteCharToInt);
1765 /* special for multiplication:
1766 This if for 'mul a,b', which takes two chars and returns an int */
1768 /* && promoteCharToInt superfluous, already handled by computeType() */
1769 && IS_INT (getSpec (ctype)))
1771 sym_link *retype = getSpec (rtype);
1772 sym_link *letype = getSpec (ltype);
1774 if ( IS_CHAR (letype)
1776 && IS_UNSIGNED (letype)
1777 && IS_UNSIGNED (retype))
1782 *op1 = geniCodeCast (ctype, *op1, TRUE);
1783 *op2 = geniCodeCast (ctype, *op2, TRUE);
1788 /*-----------------------------------------------------------------*/
1789 /* geniCodeValueAtAddress - generate intermeditate code for value */
1791 /*-----------------------------------------------------------------*/
1793 geniCodeRValue (operand * op, bool force)
1796 sym_link *type = operandType (op);
1797 sym_link *etype = getSpec (type);
1799 /* if this is an array & already */
1800 /* an address then return this */
1801 if (IS_AGGREGATE (type) ||
1802 (IS_PTR (type) && !force && !op->isaddr))
1803 return operandFromOperand (op);
1805 /* if this is not an address then must be */
1806 /* rvalue already so return this one */
1810 /* if this is not a temp symbol then */
1811 if (!IS_ITEMP (op) &&
1813 !(IN_FARSPACE (SPEC_OCLS (etype)) && !TARGET_IS_HC08))
1815 op = operandFromOperand (op);
1820 if (IS_SPEC (type) &&
1821 IS_TRUE_SYMOP (op) &&
1822 (!(IN_FARSPACE (SPEC_OCLS (etype)) && !TARGET_IS_HC08) ||
1823 (options.model == MODEL_FLAT24) ))
1825 op = operandFromOperand (op);
1830 ic = newiCode (GET_VALUE_AT_ADDRESS, op, NULL);
1831 if (IS_PTR (type) && op->isaddr && force)
1834 type = copyLinkChain (type);
1836 IC_RESULT (ic) = newiTempOperand (type, 1);
1837 IC_RESULT (ic)->isaddr = 0;
1839 /* ic->supportRtn = ((IS_GENPTR(type) | op->isGptr) & op->isaddr); */
1843 return IC_RESULT (ic);
1846 /*-----------------------------------------------------------------*/
1847 /* geniCodeCast - changes the value from one type to another */
1848 /*-----------------------------------------------------------------*/
1850 geniCodeCast (sym_link * type, operand * op, bool implicit)
1854 sym_link *opetype = getSpec (optype = operandType (op));
1858 /* one of them has size zero then error */
1859 if (IS_VOID (optype))
1861 werror (E_CAST_ZERO);
1865 /* if the operand is already the desired type then do nothing */
1866 if (compareType (type, optype) == 1)
1869 /* if this is a literal then just change the type & return */
1870 if (IS_LITERAL (opetype) && op->type == VALUE && !IS_PTR (type) && !IS_PTR (optype))
1872 return operandFromValue (valCastLiteral (type,
1873 operandLitValue (op)));
1876 /* if casting to/from pointers, do some checking */
1877 if (IS_PTR(type)) { // to a pointer
1878 if (!IS_PTR(optype) && !IS_FUNC(optype) && !IS_AGGREGATE(optype)) { // from a non pointer
1879 if (IS_INTEGRAL(optype)) {
1880 // maybe this is NULL, than it's ok.
1881 if (!(IS_LITERAL(optype) && (SPEC_CVAL(optype).v_ulong ==0))) {
1882 if (port->s.gptr_size > port->s.fptr_size && IS_GENPTR(type)) {
1883 // no way to set the storage
1884 if (IS_LITERAL(optype)) {
1885 werror(E_LITERAL_GENERIC);
1888 werror(E_NONPTR2_GENPTR);
1891 } else if (implicit) {
1892 werror(W_INTEGRAL2PTR_NOCAST);
1897 // shouldn't do that with float, array or structure unless to void
1898 if (!IS_VOID(getSpec(type)) &&
1899 !(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1900 werror(E_INCOMPAT_TYPES);
1904 } else { // from a pointer to a pointer
1905 if (port->s.gptr_size > port->s.fptr_size /*!TARGET_IS_Z80 && !TARGET_IS_GBZ80*/) {
1906 // if not a pointer to a function
1907 if (!(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1908 if (implicit) { // if not to generic, they have to match
1909 if ((!IS_GENPTR(type) && (DCL_TYPE(optype) != DCL_TYPE(type)))) {
1910 werror(E_INCOMPAT_PTYPES);
1917 } else { // to a non pointer
1918 if (IS_PTR(optype)) { // from a pointer
1919 if (implicit) { // sneaky
1920 if (IS_INTEGRAL(type)) {
1921 werror(W_PTR2INTEGRAL_NOCAST);
1923 } else { // shouldn't do that with float, array or structure
1924 werror(E_INCOMPAT_TYPES);
1931 printFromToType (optype, type);
1934 /* if they are the same size create an assignment */
1935 if (getSize (type) == getSize (optype) &&
1936 !IS_BITFIELD (type) &&
1938 !IS_FLOAT (optype) &&
1939 ((IS_SPEC (type) && IS_SPEC (optype)) ||
1940 (!IS_SPEC (type) && !IS_SPEC (optype))))
1942 ic = newiCode ('=', NULL, op);
1943 IC_RESULT (ic) = newiTempOperand (type, 0);
1944 SPIL_LOC (IC_RESULT (ic)) =
1945 (IS_TRUE_SYMOP (op) ? OP_SYMBOL (op) : NULL);
1946 IC_RESULT (ic)->isaddr = 0;
1950 ic = newiCode (CAST, operandFromLink (type),
1951 geniCodeRValue (op, FALSE));
1953 IC_RESULT (ic) = newiTempOperand (type, 0);
1956 /* preserve the storage class & output class */
1957 /* of the original variable */
1958 restype = getSpec (operandType (IC_RESULT (ic)));
1959 if (!IS_LITERAL(opetype))
1960 SPEC_SCLS (restype) = SPEC_SCLS (opetype);
1961 SPEC_OCLS (restype) = SPEC_OCLS (opetype);
1964 return IC_RESULT (ic);
1967 /*-----------------------------------------------------------------*/
1968 /* geniCodeLabel - will create a Label */
1969 /*-----------------------------------------------------------------*/
1971 geniCodeLabel (symbol * label)
1975 ic = newiCodeLabelGoto (LABEL, label);
1979 /*-----------------------------------------------------------------*/
1980 /* geniCodeGoto - will create a Goto */
1981 /*-----------------------------------------------------------------*/
1983 geniCodeGoto (symbol * label)
1987 ic = newiCodeLabelGoto (GOTO, label);
1991 /*-----------------------------------------------------------------*/
1992 /* geniCodeMultiply - gen intermediate code for multiplication */
1993 /*-----------------------------------------------------------------*/
1995 geniCodeMultiply (operand * left, operand * right, int resultIsInt)
2002 /* if they are both literal then we know the result */
2003 if (IS_LITERAL (letype) && IS_LITERAL (retype))
2004 return operandFromValue (valMult (left->operand.valOperand,
2005 right->operand.valOperand));
2007 if (IS_LITERAL(retype)) {
2008 p2 = powof2 ((TYPE_UDWORD) floatFromVal (right->operand.valOperand));
2011 resType = usualBinaryConversions (&left, &right, resultIsInt, TRUE);
2013 rtype = operandType (right);
2014 retype = getSpec (rtype);
2015 ltype = operandType (left);
2016 letype = getSpec (ltype);
2019 /* if the right is a literal & power of 2 */
2020 /* then make it a left shift */
2021 /* code generated for 1 byte * 1 byte literal = 2 bytes result is more
2022 efficient in most cases than 2 bytes result = 2 bytes << literal
2023 if port has 1 byte muldiv */
2024 if (p2 && !IS_FLOAT (letype) &&
2025 !((resultIsInt) && (getSize (resType) != getSize (ltype)) &&
2026 (port->support.muldiv == 1)))
2028 if ((resultIsInt) && (getSize (resType) != getSize (ltype)))
2030 /* LEFT_OP need same size for left and result, */
2031 left = geniCodeCast (resType, left, TRUE);
2032 ltype = operandType (left);
2034 ic = newiCode (LEFT_OP, left, operandFromLit (p2)); /* left shift */
2038 ic = newiCode ('*', left, right); /* normal multiplication */
2039 /* if the size left or right > 1 then support routine */
2040 if (getSize (ltype) > 1 || getSize (rtype) > 1)
2044 IC_RESULT (ic) = newiTempOperand (resType, 1);
2047 return IC_RESULT (ic);
2050 /*-----------------------------------------------------------------*/
2051 /* geniCodeDivision - gen intermediate code for division */
2052 /*-----------------------------------------------------------------*/
2054 geniCodeDivision (operand * left, operand * right)
2059 sym_link *rtype = operandType (right);
2060 sym_link *retype = getSpec (rtype);
2061 sym_link *ltype = operandType (left);
2062 sym_link *letype = getSpec (ltype);
2064 resType = usualBinaryConversions (&left, &right,
2065 (IS_UNSIGNED (retype) && IS_UNSIGNED (letype)) ? FALSE : TRUE,
2068 /* if the right is a literal & power of 2
2069 and left is unsigned then make it a
2071 if (IS_LITERAL (retype) &&
2072 !IS_FLOAT (letype) &&
2073 IS_UNSIGNED(letype) &&
2074 (p2 = powof2 ((TYPE_UDWORD)
2075 floatFromVal (right->operand.valOperand)))) {
2076 ic = newiCode (RIGHT_OP, left, operandFromLit (p2)); /* right shift */
2080 ic = newiCode ('/', left, right); /* normal division */
2081 /* if the size left or right > 1 then support routine */
2082 if (getSize (ltype) > 1 || getSize (rtype) > 1)
2085 IC_RESULT (ic) = newiTempOperand (resType, 0);
2088 return IC_RESULT (ic);
2090 /*-----------------------------------------------------------------*/
2091 /* geniCodeModulus - gen intermediate code for modulus */
2092 /*-----------------------------------------------------------------*/
2094 geniCodeModulus (operand * left, operand * right)
2100 /* if they are both literal then we know the result */
2101 if (IS_LITERAL (letype) && IS_LITERAL (retype))
2102 return operandFromValue (valMod (left->operand.valOperand,
2103 right->operand.valOperand));
2105 resType = usualBinaryConversions (&left, &right,
2106 (IS_UNSIGNED (retype) && IS_UNSIGNED (letype)) ? FALSE : TRUE,
2109 /* now they are the same size */
2110 ic = newiCode ('%', left, right);
2112 /* if the size left or right > 1 then support routine */
2113 if (getSize (ltype) > 1 || getSize (rtype) > 1)
2115 IC_RESULT (ic) = newiTempOperand (resType, 0);
2118 return IC_RESULT (ic);
2121 /*-----------------------------------------------------------------*/
2122 /* geniCodePtrPtrSubtract - subtracts pointer from pointer */
2123 /*-----------------------------------------------------------------*/
2125 geniCodePtrPtrSubtract (operand * left, operand * right)
2131 /* if they are both literals then */
2132 if (IS_LITERAL (letype) && IS_LITERAL (retype))
2134 result = operandFromValue (valMinus (left->operand.valOperand,
2135 right->operand.valOperand));
2139 ic = newiCode ('-', left, right);
2141 IC_RESULT (ic) = result = newiTempOperand (newIntLink (), 1);
2145 if (IS_VOID(ltype->next) || IS_VOID(rtype->next)) {
2149 // should we really do this? is this ANSI?
2150 return geniCodeDivision (result,
2151 operandFromLit (getSize (ltype->next)));
2154 /*-----------------------------------------------------------------*/
2155 /* geniCodeSubtract - generates code for subtraction */
2156 /*-----------------------------------------------------------------*/
2158 geniCodeSubtract (operand * left, operand * right)
2165 /* if they both pointers then */
2166 if ((IS_PTR (ltype) || IS_ARRAY (ltype)) &&
2167 (IS_PTR (rtype) || IS_ARRAY (rtype)))
2168 return geniCodePtrPtrSubtract (left, right);
2170 /* if they are both literal then we know the result */
2171 if (IS_LITERAL (letype) && IS_LITERAL (retype)
2172 && left->isLiteral && right->isLiteral)
2173 return operandFromValue (valMinus (left->operand.valOperand,
2174 right->operand.valOperand));
2176 /* if left is an array or pointer */
2177 if (IS_PTR (ltype) || IS_ARRAY (ltype))
2179 isarray = left->isaddr;
2180 right = geniCodeMultiply (right,
2181 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
2182 resType = copyLinkChain (IS_ARRAY (ltype) ? ltype->next : ltype);
2185 { /* make them the same size */
2186 resType = usualBinaryConversions (&left, &right, FALSE, FALSE);
2189 ic = newiCode ('-', left, right);
2191 IC_RESULT (ic) = newiTempOperand (resType, 1);
2192 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
2194 /* if left or right is a float */
2195 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
2199 return IC_RESULT (ic);
2202 /*-----------------------------------------------------------------*/
2203 /* geniCodeAdd - generates iCode for addition */
2204 /*-----------------------------------------------------------------*/
2206 geniCodeAdd (operand * left, operand * right, int lvl)
2215 /* if the right side is LITERAL zero */
2216 /* return the left side */
2217 if (IS_LITERAL (retype) && right->isLiteral && !floatFromVal (valFromType (rtype)))
2220 /* if left is literal zero return right */
2221 if (IS_LITERAL (letype) && left->isLiteral && !floatFromVal (valFromType (ltype)))
2224 /* if left is a pointer then size */
2225 if (IS_PTR (ltype) || IS_ARRAY(ltype))
2227 isarray = left->isaddr;
2228 // there is no need to multiply with 1
2229 if (getSize (ltype->next) != 1)
2231 size = operandFromLit (getSize (ltype->next));
2232 SPEC_USIGN (getSpec (operandType (size))) = 1;
2233 indexUnsigned = IS_UNSIGNED (getSpec (operandType (right)));
2234 right = geniCodeMultiply (right, size, (getArraySizePtr(left) >= INTSIZE));
2235 /* Even if right is a 'unsigned char',
2236 the result will be a 'signed int' due to the promotion rules.
2237 It doesn't make sense when accessing arrays, so let's fix it here: */
2239 SPEC_USIGN (getSpec (operandType (right))) = 1;
2241 resType = copyLinkChain (ltype);
2244 { // make them the same size
2245 resType = usualBinaryConversions (&left, &right, FALSE, FALSE);
2248 /* if they are both literals then we know */
2249 if (IS_LITERAL (letype) && IS_LITERAL (retype)
2250 && left->isLiteral && right->isLiteral)
2251 return operandFromValue (valPlus (valFromType (ltype),
2252 valFromType (rtype)));
2254 ic = newiCode ('+', left, right);
2256 IC_RESULT (ic) = newiTempOperand (resType, 1);
2257 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
2259 /* if left or right is a float then support
2261 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
2266 return IC_RESULT (ic);
2270 /*-----------------------------------------------------------------*/
2271 /* aggrToPtr - changes an aggregate to pointer to an aggregate */
2272 /*-----------------------------------------------------------------*/
2274 aggrToPtr (sym_link * type, bool force)
2279 if (IS_PTR (type) && !force)
2282 etype = getSpec (type);
2283 ptype = newLink (DECLARATOR);
2287 /* set the pointer depending on the storage class */
2288 DCL_TYPE (ptype) = PTR_TYPE (SPEC_OCLS (etype));
2292 /*-----------------------------------------------------------------*/
2293 /* geniCodeArray2Ptr - array to pointer */
2294 /*-----------------------------------------------------------------*/
2296 geniCodeArray2Ptr (operand * op)
2298 sym_link *optype = operandType (op);
2299 sym_link *opetype = getSpec (optype);
2301 /* set the pointer depending on the storage class */
2302 DCL_TYPE (optype) = PTR_TYPE (SPEC_OCLS (opetype));
2309 /*-----------------------------------------------------------------*/
2310 /* geniCodeArray - array access */
2311 /*-----------------------------------------------------------------*/
2313 geniCodeArray (operand * left, operand * right,int lvl)
2317 sym_link *ltype = operandType (left);
2322 if (IS_PTR (ltype->next) && left->isaddr)
2324 left = geniCodeRValue (left, FALSE);
2327 return geniCodeDerefPtr (geniCodeAdd (left, right, lvl), lvl);
2329 size = operandFromLit (getSize (ltype->next));
2330 SPEC_USIGN (getSpec (operandType (size))) = 1;
2331 indexUnsigned = IS_UNSIGNED (getSpec (operandType (right)));
2332 right = geniCodeMultiply (right, size, (getArraySizePtr(left) >= INTSIZE));
2333 /* Even if right is a 'unsigned char', the result will be a 'signed int' due to the promotion rules.
2334 It doesn't make sense when accessing arrays, so let's fix it here: */
2336 SPEC_USIGN (getSpec (operandType (right))) = 1;
2337 /* we can check for limits here */
2338 if (isOperandLiteral (right) &&
2341 (operandLitValue (right) / getSize (ltype->next)) >= DCL_ELEM (ltype))
2343 werror (E_ARRAY_BOUND);
2344 right = operandFromLit (0);
2347 ic = newiCode ('+', left, right);
2349 IC_RESULT (ic) = newiTempOperand (((IS_PTR (ltype) &&
2350 !IS_AGGREGATE (ltype->next) &&
2351 !IS_PTR (ltype->next))
2352 ? ltype : ltype->next), 0);
2354 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (ltype->next));
2357 return IC_RESULT (ic);
2360 /*-----------------------------------------------------------------*/
2361 /* geniCodeStruct - generates intermediate code for structures */
2362 /*-----------------------------------------------------------------*/
2364 geniCodeStruct (operand * left, operand * right, bool islval)
2367 sym_link *type = operandType (left);
2368 sym_link *etype = getSpec (type);
2370 symbol *element = getStructElement (SPEC_STRUCT (etype),
2371 right->operand.symOperand);
2373 wassert(IS_SYMOP(right));
2375 /* add the offset */
2376 ic = newiCode ('+', left, operandFromLit (element->offset));
2378 IC_RESULT (ic) = newiTempOperand (element->type, 0);
2380 /* preserve the storage & output class of the struct */
2381 /* as well as the volatile attribute */
2382 retype = getSpec (operandType (IC_RESULT (ic)));
2383 SPEC_SCLS (retype) = SPEC_SCLS (etype);
2384 SPEC_OCLS (retype) = SPEC_OCLS (etype);
2385 SPEC_VOLATILE (retype) |= SPEC_VOLATILE (etype);
2386 SPEC_CONST (retype) |= SPEC_CONST (etype);
2388 if (IS_PTR (element->type))
2389 setOperandType (IC_RESULT (ic), aggrToPtr (operandType (IC_RESULT (ic)), TRUE));
2391 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (element->type));
2394 return (islval ? IC_RESULT (ic) : geniCodeRValue (IC_RESULT (ic), TRUE));
2397 /*-----------------------------------------------------------------*/
2398 /* geniCodePostInc - generate int code for Post increment */
2399 /*-----------------------------------------------------------------*/
2401 geniCodePostInc (operand * op)
2405 sym_link *optype = operandType (op);
2407 operand *rv = (IS_ITEMP (op) ?
2408 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2410 sym_link *rvtype = operandType (rv);
2413 /* if this is not an address we have trouble */
2416 werror (E_LVALUE_REQUIRED, "++");
2420 rOp = newiTempOperand (rvtype, 0);
2421 OP_SYMBOL(rOp)->noSpilLoc = 1;
2424 OP_SYMBOL(rv)->noSpilLoc = 1;
2426 geniCodeAssign (rOp, rv, 0);
2428 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2429 if (IS_FLOAT (rvtype))
2430 ic = newiCode ('+', rv, operandFromValue (constFloatVal ("1.0")));
2432 ic = newiCode ('+', rv, operandFromLit (size));
2434 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2437 geniCodeAssign (op, result, 0);
2443 /*-----------------------------------------------------------------*/
2444 /* geniCodePreInc - generate code for preIncrement */
2445 /*-----------------------------------------------------------------*/
2447 geniCodePreInc (operand * op, bool lvalue)
2450 sym_link *optype = operandType (op);
2451 operand *rop = (IS_ITEMP (op) ?
2452 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2454 sym_link *roptype = operandType (rop);
2460 werror (E_LVALUE_REQUIRED, "++");
2465 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2466 if (IS_FLOAT (roptype))
2467 ic = newiCode ('+', rop, operandFromValue (constFloatVal ("1.0")));
2469 ic = newiCode ('+', rop, operandFromLit (size));
2470 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2473 (void) geniCodeAssign (op, result, 0);
2474 if (lvalue || IS_TRUE_SYMOP (op))
2480 /*-----------------------------------------------------------------*/
2481 /* geniCodePostDec - generates code for Post decrement */
2482 /*-----------------------------------------------------------------*/
2484 geniCodePostDec (operand * op)
2488 sym_link *optype = operandType (op);
2490 operand *rv = (IS_ITEMP (op) ?
2491 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2493 sym_link *rvtype = operandType (rv);
2496 /* if this is not an address we have trouble */
2499 werror (E_LVALUE_REQUIRED, "--");
2503 rOp = newiTempOperand (rvtype, 0);
2504 OP_SYMBOL(rOp)->noSpilLoc = 1;
2507 OP_SYMBOL(rv)->noSpilLoc = 1;
2509 geniCodeAssign (rOp, rv, 0);
2511 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2512 if (IS_FLOAT (rvtype))
2513 ic = newiCode ('-', rv, operandFromValue (constFloatVal ("1.0")));
2515 ic = newiCode ('-', rv, operandFromLit (size));
2517 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2520 geniCodeAssign (op, result, 0);
2526 /*-----------------------------------------------------------------*/
2527 /* geniCodePreDec - generate code for pre decrement */
2528 /*-----------------------------------------------------------------*/
2530 geniCodePreDec (operand * op, bool lvalue)
2533 sym_link *optype = operandType (op);
2534 operand *rop = (IS_ITEMP (op) ?
2535 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2537 sym_link *roptype = operandType (rop);
2543 werror (E_LVALUE_REQUIRED, "--");
2548 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2549 if (IS_FLOAT (roptype))
2550 ic = newiCode ('-', rop, operandFromValue (constFloatVal ("1.0")));
2552 ic = newiCode ('-', rop, operandFromLit (size));
2553 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2556 (void) geniCodeAssign (op, result, 0);
2557 if (lvalue || IS_TRUE_SYMOP (op))
2564 /*-----------------------------------------------------------------*/
2565 /* geniCodeBitwise - gen int code for bitWise operators */
2566 /*-----------------------------------------------------------------*/
2568 geniCodeBitwise (operand * left, operand * right,
2569 int oper, sym_link * resType)
2573 left = geniCodeCast (resType, left, TRUE);
2574 right = geniCodeCast (resType, right, TRUE);
2576 ic = newiCode (oper, left, right);
2577 IC_RESULT (ic) = newiTempOperand (resType, 0);
2580 return IC_RESULT (ic);
2583 /*-----------------------------------------------------------------*/
2584 /* geniCodeAddressOf - gens icode for '&' address of operator */
2585 /*-----------------------------------------------------------------*/
2587 geniCodeAddressOf (operand * op)
2591 sym_link *optype = operandType (op);
2592 sym_link *opetype = getSpec (optype);
2594 if (IS_ITEMP (op) && op->isaddr && IS_PTR (optype))
2596 op = operandFromOperand (op);
2601 /* lvalue check already done in decorateType */
2602 /* this must be a lvalue */
2603 /* if (!op->isaddr && !IS_AGGREGATE(optype)) { */
2604 /* werror (E_LVALUE_REQUIRED,"&"); */
2608 p = newLink (DECLARATOR);
2610 /* set the pointer depending on the storage class */
2611 DCL_TYPE (p) = PTR_TYPE (SPEC_OCLS (opetype));
2613 p->next = copyLinkChain (optype);
2615 /* if already a temp */
2618 setOperandType (op, p);
2623 /* other wise make this of the type coming in */
2624 ic = newiCode (ADDRESS_OF, op, NULL);
2625 IC_RESULT (ic) = newiTempOperand (p, 1);
2626 IC_RESULT (ic)->isaddr = 0;
2628 return IC_RESULT (ic);
2630 /*-----------------------------------------------------------------*/
2631 /* setOClass - sets the output class depending on the pointer type */
2632 /*-----------------------------------------------------------------*/
2634 setOClass (sym_link * ptr, sym_link * spec)
2636 switch (DCL_TYPE (ptr))
2639 SPEC_OCLS (spec) = data;
2643 SPEC_OCLS (spec) = generic;
2647 SPEC_OCLS (spec) = xdata;
2651 SPEC_OCLS (spec) = code;
2655 SPEC_OCLS (spec) = idata;
2659 SPEC_OCLS (spec) = xstack;
2663 SPEC_OCLS (spec) = eeprom;
2672 /*-----------------------------------------------------------------*/
2673 /* geniCodeDerefPtr - dereference pointer with '*' */
2674 /*-----------------------------------------------------------------*/
2676 geniCodeDerefPtr (operand * op,int lvl)
2678 sym_link *rtype, *retype;
2679 sym_link *optype = operandType (op);
2681 // if this is an array then array access
2682 if (IS_ARRAY (optype)) {
2683 // don't worry, this will be optimized out later
2684 return geniCodeArray (op, operandFromLit (0), lvl);
2687 // just in case someone screws up
2688 wassert (IS_PTR (optype));
2690 if (IS_TRUE_SYMOP (op))
2693 op = geniCodeRValue (op, TRUE);
2696 /* now get rid of the pointer part */
2697 if (isLvaluereq(lvl) && IS_ITEMP (op))
2699 retype = getSpec (rtype = copyLinkChain (optype));
2703 retype = getSpec (rtype = copyLinkChain (optype->next));
2704 /* outputclass needs 2b updated */
2705 setOClass (optype, retype);
2708 op->isGptr = IS_GENPTR (optype);
2710 op->isaddr = (IS_PTR (rtype) ||
2711 IS_STRUCT (rtype) ||
2716 if (!isLvaluereq(lvl))
2717 op = geniCodeRValue (op, TRUE);
2719 setOperandType (op, rtype);
2724 /*-----------------------------------------------------------------*/
2725 /* geniCodeUnaryMinus - does a unary minus of the operand */
2726 /*-----------------------------------------------------------------*/
2728 geniCodeUnaryMinus (operand * op)
2731 sym_link *optype = operandType (op);
2733 if (IS_LITERAL (optype))
2734 return operandFromLit (-floatFromVal (op->operand.valOperand));
2736 ic = newiCode (UNARYMINUS, op, NULL);
2737 IC_RESULT (ic) = newiTempOperand (optype, 0);
2739 return IC_RESULT (ic);
2742 /*-----------------------------------------------------------------*/
2743 /* geniCodeLeftShift - gen i code for left shift */
2744 /*-----------------------------------------------------------------*/
2746 geniCodeLeftShift (operand * left, operand * right)
2750 ic = newiCode (LEFT_OP, left, right);
2751 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2753 return IC_RESULT (ic);
2756 /*-----------------------------------------------------------------*/
2757 /* geniCodeRightShift - gen i code for right shift */
2758 /*-----------------------------------------------------------------*/
2760 geniCodeRightShift (operand * left, operand * right)
2764 ic = newiCode (RIGHT_OP, left, right);
2765 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2767 return IC_RESULT (ic);
2770 /*-----------------------------------------------------------------*/
2771 /* geniCodeLogic- logic code */
2772 /*-----------------------------------------------------------------*/
2774 geniCodeLogic (operand * left, operand * right, int op)
2778 sym_link *rtype = operandType (right);
2779 sym_link *ltype = operandType (left);
2781 /* left is integral type and right is literal then
2782 check if the literal value is within bounds */
2783 if (IS_INTEGRAL (ltype) && IS_VALOP (right) && IS_LITERAL (rtype))
2785 checkConstantRange(ltype,
2786 OP_VALUE(right), "compare operation", 1);
2789 /* if one operand is a pointer and the other is a literal generic void pointer,
2790 change the type of the literal generic void pointer to match the other pointer */
2791 if (IS_GENPTR (ltype) && IS_VOID (ltype->next) && IS_ITEMP (left)
2792 && IS_PTR (rtype) && !IS_GENPTR(rtype))
2794 /* find left's definition */
2795 ic = (iCode *) setFirstItem (iCodeChain);
2798 if (((ic->op == CAST) || (ic->op == '='))
2799 && isOperandEqual(left, IC_RESULT (ic)))
2802 ic = setNextItem (iCodeChain);
2804 /* if casting literal to generic pointer, then cast to rtype instead */
2805 if (ic && (ic->op == CAST) && isOperandLiteral(IC_RIGHT (ic)))
2807 left = operandFromValue (valCastLiteral (rtype, operandLitValue (IC_RIGHT (ic))));
2808 ltype = operandType(left);
2811 if (IS_GENPTR (rtype) && IS_VOID (rtype->next) && IS_ITEMP (right)
2812 && IS_PTR (ltype) && !IS_GENPTR(ltype))
2814 /* find right's definition */
2815 ic = (iCode *) setFirstItem (iCodeChain);
2818 if (((ic->op == CAST) || (ic->op == '='))
2819 && isOperandEqual(right, IC_RESULT (ic)))
2822 ic = setNextItem (iCodeChain);
2824 /* if casting literal to generic pointer, then cast to rtype instead */
2825 if (ic && (ic->op == CAST) && isOperandLiteral(IC_RIGHT (ic)))
2827 right = operandFromValue (valCastLiteral (ltype, operandLitValue (IC_RIGHT (ic))));
2828 rtype = operandType(right);
2832 ctype = usualBinaryConversions (&left, &right, FALSE, FALSE);
2834 ic = newiCode (op, left, right);
2835 IC_RESULT (ic) = newiTempOperand (newCharLink (), 1);
2837 /* if comparing float
2838 and not a '==' || '!=' || '&&' || '||' (these
2840 if (IS_FLOAT(ctype) &&
2848 return IC_RESULT (ic);
2851 /*-----------------------------------------------------------------*/
2852 /* geniCodeUnary - for a a generic unary operation */
2853 /*-----------------------------------------------------------------*/
2855 geniCodeUnary (operand * op, int oper)
2857 iCode *ic = newiCode (oper, op, NULL);
2859 IC_RESULT (ic) = newiTempOperand (operandType (op), 0);
2861 return IC_RESULT (ic);
2864 /*-----------------------------------------------------------------*/
2865 /* geniCodeConditional - geniCode for '?' ':' operation */
2866 /*-----------------------------------------------------------------*/
2868 geniCodeConditional (ast * tree,int lvl)
2871 symbol *falseLabel = newiTempLabel (NULL);
2872 symbol *exitLabel = newiTempLabel (NULL);
2873 operand *cond = ast2iCode (tree->left,lvl+1);
2874 operand *true, *false, *result;
2876 ic = newiCodeCondition (geniCodeRValue (cond, FALSE),
2880 true = ast2iCode (tree->right->left,lvl+1);
2882 /* move the value to a new Operand */
2883 result = newiTempOperand (tree->right->ftype, 0);
2884 geniCodeAssign (result, geniCodeRValue (true, FALSE), 0);
2886 /* generate an unconditional goto */
2887 geniCodeGoto (exitLabel);
2889 /* now for the right side */
2890 geniCodeLabel (falseLabel);
2892 false = ast2iCode (tree->right->right,lvl+1);
2893 geniCodeAssign (result, geniCodeRValue (false, FALSE), 0);
2895 /* create the exit label */
2896 geniCodeLabel (exitLabel);
2901 /*-----------------------------------------------------------------*/
2902 /* geniCodeAssign - generate code for assignment */
2903 /*-----------------------------------------------------------------*/
2905 geniCodeAssign (operand * left, operand * right, int nosupdate)
2908 sym_link *ltype = operandType (left);
2909 sym_link *rtype = operandType (right);
2911 if (!left->isaddr && !IS_ITEMP (left))
2913 werror (E_LVALUE_REQUIRED, "assignment");
2917 /* left is integral type and right is literal then
2918 check if the literal value is within bounds */
2919 if (IS_INTEGRAL (ltype) && right->type == VALUE && IS_LITERAL (rtype))
2921 checkConstantRange(ltype,
2922 OP_VALUE(right), "= operation", 0);
2925 /* if the left & right type don't exactly match */
2926 /* if pointer set then make sure the check is
2927 done with the type & not the pointer */
2928 /* then cast rights type to left */
2930 /* first check the type for pointer assignement */
2931 if (left->isaddr && IS_PTR (ltype) && IS_ITEMP (left) &&
2932 compareType (ltype, rtype) <= 0)
2934 if (compareType (ltype->next, rtype) < 0)
2935 right = geniCodeCast (ltype->next, right, TRUE);
2937 else if (compareType (ltype, rtype) < 0)
2938 right = geniCodeCast (ltype, right, TRUE);
2940 /* If left is a true symbol & ! volatile
2941 create an assignment to temporary for
2942 the right & then assign this temporary
2943 to the symbol. This is SSA (static single
2944 assignment). Isn't it simple and folks have
2945 published mountains of paper on it */
2946 if (IS_TRUE_SYMOP (left) &&
2947 !isOperandVolatile (left, FALSE) &&
2948 isOperandGlobal (left))
2952 if (IS_TRUE_SYMOP (right))
2953 sym = OP_SYMBOL (right);
2954 ic = newiCode ('=', NULL, right);
2955 IC_RESULT (ic) = right = newiTempOperand (ltype, 0);
2956 SPIL_LOC (right) = sym;
2960 ic = newiCode ('=', NULL, right);
2961 IC_RESULT (ic) = left;
2964 /* if left isgptr flag is set then support
2965 routine will be required */
2969 ic->nosupdate = nosupdate;
2973 /*-----------------------------------------------------------------*/
2974 /* geniCodeDummyRead - generate code for dummy read */
2975 /*-----------------------------------------------------------------*/
2977 geniCodeDummyRead (operand * op)
2980 sym_link *type = operandType (op);
2982 if (!IS_VOLATILE(type))
2985 ic = newiCode (DUMMY_READ_VOLATILE, NULL, op);
2991 /*-----------------------------------------------------------------*/
2992 /* geniCodeSEParms - generate code for side effecting fcalls */
2993 /*-----------------------------------------------------------------*/
2995 geniCodeSEParms (ast * parms,int lvl)
3000 if (parms->type == EX_OP && parms->opval.op == PARAM)
3002 geniCodeSEParms (parms->left,lvl);
3003 geniCodeSEParms (parms->right,lvl);
3007 /* hack don't like this but too lazy to think of
3009 if (IS_ADDRESS_OF_OP (parms))
3010 parms->left->lvalue = 1;
3012 if (IS_CAST_OP (parms) &&
3013 IS_PTR (parms->ftype) &&
3014 IS_ADDRESS_OF_OP (parms->right))
3015 parms->right->left->lvalue = 1;
3017 parms->opval.oprnd =
3018 geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
3020 parms->type = EX_OPERAND;
3021 AST_ARGREG(parms) = parms->etype ? SPEC_ARGREG(parms->etype) :
3022 SPEC_ARGREG(parms->ftype);
3025 /*-----------------------------------------------------------------*/
3026 /* geniCodeParms - generates parameters */
3027 /*-----------------------------------------------------------------*/
3029 geniCodeParms (ast * parms, value *argVals, int *stack,
3030 sym_link * fetype, symbol * func,int lvl)
3038 if (argVals==NULL) {
3040 argVals=FUNC_ARGS(func->type);
3043 /* if this is a param node then do the left & right */
3044 if (parms->type == EX_OP && parms->opval.op == PARAM)
3046 argVals=geniCodeParms (parms->left, argVals, stack, fetype, func,lvl);
3047 argVals=geniCodeParms (parms->right, argVals, stack, fetype, func,lvl);
3051 /* get the parameter value */
3052 if (parms->type == EX_OPERAND)
3053 pval = parms->opval.oprnd;
3056 /* maybe this else should go away ?? */
3057 /* hack don't like this but too lazy to think of
3059 if (IS_ADDRESS_OF_OP (parms))
3060 parms->left->lvalue = 1;
3062 if (IS_CAST_OP (parms) &&
3063 IS_PTR (parms->ftype) &&
3064 IS_ADDRESS_OF_OP (parms->right))
3065 parms->right->left->lvalue = 1;
3067 pval = geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
3070 /* if register parm then make it a send */
3071 if ((IS_REGPARM (parms->etype) && !IFFUNC_HASVARARGS(func->type)) ||
3072 IFFUNC_ISBUILTIN(func->type))
3074 ic = newiCode (SEND, pval, NULL);
3075 ic->argreg = SPEC_ARGREG(parms->etype);
3076 ic->builtinSEND = FUNC_ISBUILTIN(func->type);
3081 /* now decide whether to push or assign */
3082 if (!(options.stackAuto || IFFUNC_ISREENT (func->type)))
3086 operand *top = operandFromSymbol (argVals->sym);
3087 /* clear useDef and other bitVectors */
3088 OP_USES(top)=OP_DEFS(top)=OP_SYMBOL(top)->clashes = NULL;
3089 geniCodeAssign (top, pval, 1);
3093 sym_link *p = operandType (pval);
3095 ic = newiCode (IPUSH, pval, NULL);
3097 /* update the stack adjustment */
3098 *stack += getSize (IS_AGGREGATE (p) ? aggrToPtr (p, FALSE) : p);
3103 argVals=argVals->next;
3107 /*-----------------------------------------------------------------*/
3108 /* geniCodeCall - generates temp code for calling */
3109 /*-----------------------------------------------------------------*/
3111 geniCodeCall (operand * left, ast * parms,int lvl)
3115 sym_link *type, *etype;
3118 if (!IS_FUNC(OP_SYMBOL(left)->type) &&
3119 !IS_CODEPTR(OP_SYMBOL(left)->type)) {
3120 werror (E_FUNCTION_EXPECTED);
3121 return operandFromValue(valueFromLit(0));
3124 /* take care of parameters with side-effecting
3125 function calls in them, this is required to take care
3126 of overlaying function parameters */
3127 geniCodeSEParms (parms,lvl);
3129 /* first the parameters */
3130 geniCodeParms (parms, NULL, &stack, getSpec (operandType (left)), OP_SYMBOL (left),lvl);
3132 /* now call : if symbol then pcall */
3133 if (IS_OP_POINTER (left) || IS_ITEMP(left)) {
3134 ic = newiCode (PCALL, left, NULL);
3136 ic = newiCode (CALL, left, NULL);
3139 type = copyLinkChain (operandType (left)->next);
3140 etype = getSpec (type);
3141 SPEC_EXTR (etype) = 0;
3142 IC_RESULT (ic) = result = newiTempOperand (type, 1);
3146 /* stack adjustment after call */
3147 ic->parmBytes = stack;
3152 /*-----------------------------------------------------------------*/
3153 /* geniCodeReceive - generate intermediate code for "receive" */
3154 /*-----------------------------------------------------------------*/
3156 geniCodeReceive (value * args)
3158 /* for all arguments that are passed in registers */
3162 if (IS_REGPARM (args->etype))
3164 operand *opr = operandFromValue (args);
3166 symbol *sym = OP_SYMBOL (opr);
3169 /* we will use it after all optimizations
3170 and before liveRange calculation */
3171 if (!sym->addrtaken && !IS_VOLATILE (sym->etype))
3174 if ((IN_FARSPACE (SPEC_OCLS (sym->etype)) && !TARGET_IS_HC08) &&
3175 options.stackAuto == 0 &&
3176 (!(options.model == MODEL_FLAT24)) )
3181 opl = newiTempOperand (args->type, 0);
3183 sym->reqv->key = sym->key;
3184 OP_SYMBOL (sym->reqv)->key = sym->key;
3185 OP_SYMBOL (sym->reqv)->isreqv = 1;
3186 OP_SYMBOL (sym->reqv)->islocal = 0;
3187 SPIL_LOC (sym->reqv) = sym;
3191 ic = newiCode (RECEIVE, NULL, NULL);
3192 ic->argreg = SPEC_ARGREG(args->etype);
3194 currFunc->recvSize = getSize (sym->type);
3197 IC_RESULT (ic) = opr;
3205 /*-----------------------------------------------------------------*/
3206 /* geniCodeFunctionBody - create the function body */
3207 /*-----------------------------------------------------------------*/
3209 geniCodeFunctionBody (ast * tree,int lvl)
3216 /* reset the auto generation */
3222 func = ast2iCode (tree->left,lvl+1);
3223 fetype = getSpec (operandType (func));
3225 savelineno = lineno;
3226 lineno = OP_SYMBOL (func)->lineDef;
3227 /* create an entry label */
3228 geniCodeLabel (entryLabel);
3229 lineno = savelineno;
3231 /* create a proc icode */
3232 ic = newiCode (FUNCTION, func, NULL);
3233 lineno=ic->lineno = OP_SYMBOL (func)->lineDef;
3237 /* for all parameters that are passed
3238 on registers add a "receive" */
3239 geniCodeReceive (tree->values.args);
3241 /* generate code for the body */
3242 ast2iCode (tree->right,lvl+1);
3244 /* create a label for return */
3245 geniCodeLabel (returnLabel);
3247 /* now generate the end proc */
3248 ic = newiCode (ENDFUNCTION, func, NULL);
3253 /*-----------------------------------------------------------------*/
3254 /* geniCodeReturn - gen icode for 'return' statement */
3255 /*-----------------------------------------------------------------*/
3257 geniCodeReturn (operand * op)
3261 /* if the operand is present force an rvalue */
3263 op = geniCodeRValue (op, FALSE);
3265 ic = newiCode (RETURN, op, NULL);
3269 /*-----------------------------------------------------------------*/
3270 /* geniCodeIfx - generates code for extended if statement */
3271 /*-----------------------------------------------------------------*/
3273 geniCodeIfx (ast * tree,int lvl)
3276 operand *condition = ast2iCode (tree->left,lvl+1);
3279 /* if condition is null then exit */
3283 condition = geniCodeRValue (condition, FALSE);
3285 cetype = getSpec (operandType (condition));
3286 /* if the condition is a literal */
3287 if (IS_LITERAL (cetype))
3289 if (floatFromVal (condition->operand.valOperand))
3291 if (tree->trueLabel)
3292 geniCodeGoto (tree->trueLabel);
3298 if (tree->falseLabel)
3299 geniCodeGoto (tree->falseLabel);
3306 if (tree->trueLabel)
3308 ic = newiCodeCondition (condition,
3313 if (tree->falseLabel)
3314 geniCodeGoto (tree->falseLabel);
3318 ic = newiCodeCondition (condition,
3325 ast2iCode (tree->right,lvl+1);
3328 /*-----------------------------------------------------------------*/
3329 /* geniCodeJumpTable - tries to create a jump table for switch */
3330 /*-----------------------------------------------------------------*/
3332 geniCodeJumpTable (operand * cond, value * caseVals, ast * tree)
3334 int min = 0, max = 0, t, cnt = 0;
3340 int needRangeCheck = !optimize.noJTabBoundary
3341 || tree->values.switchVals.swDefault;
3343 if (!tree || !caseVals)
3346 /* the criteria for creating a jump table is */
3347 /* all integer numbers between the maximum & minimum must */
3348 /* be present , the maximum value should not exceed 255 */
3349 min = max = (int) floatFromVal (vch = caseVals);
3350 SNPRINTF (buffer, sizeof(buffer),
3352 tree->values.switchVals.swNum,
3354 addSet (&labels, newiTempLabel (buffer));
3356 /* if there is only one case value then no need */
3357 if (!(vch = vch->next))
3362 if (((t = (int) floatFromVal (vch)) - max) != 1)
3364 SNPRINTF (buffer, sizeof(buffer),
3366 tree->values.switchVals.swNum,
3368 addSet (&labels, newiTempLabel (buffer));
3374 /* if the number of case statements <= 2 then */
3375 /* it is not economical to create the jump table */
3376 /* since two compares are needed for boundary conditions */
3377 if ((needRangeCheck && cnt <= 2) || max > (255 / 3))
3380 if (tree->values.switchVals.swDefault)
3382 SNPRINTF (buffer, sizeof(buffer), "_default_%d", tree->values.switchVals.swNum);
3386 SNPRINTF (buffer, sizeof(buffer), "_swBrk_%d", tree->values.switchVals.swNum);
3390 falseLabel = newiTempLabel (buffer);
3392 /* so we can create a jumptable */
3393 /* first we rule out the boundary conditions */
3394 /* if only optimization says so */
3397 sym_link *cetype = getSpec (operandType (cond));
3398 /* no need to check the lower bound if
3399 the condition is unsigned & minimum value is zero */
3400 if (!(min == 0 && IS_UNSIGNED (cetype)))
3402 boundary = geniCodeLogic (cond, operandFromLit (min), '<');
3403 ic = newiCodeCondition (boundary, falseLabel, NULL);
3407 /* now for upper bounds */
3408 boundary = geniCodeLogic (cond, operandFromLit (max), '>');
3409 ic = newiCodeCondition (boundary, falseLabel, NULL);
3413 /* if the min is not zero then we no make it zero */
3416 cond = geniCodeSubtract (cond, operandFromLit (min));
3417 if (!IS_LITERAL(getSpec(operandType(cond))))
3418 setOperandType (cond, UCHARTYPE);
3421 /* now create the jumptable */
3422 ic = newiCode (JUMPTABLE, NULL, NULL);
3423 IC_JTCOND (ic) = cond;
3424 IC_JTLABELS (ic) = labels;
3429 /*-----------------------------------------------------------------*/
3430 /* geniCodeSwitch - changes a switch to a if statement */
3431 /*-----------------------------------------------------------------*/
3433 geniCodeSwitch (ast * tree,int lvl)
3436 operand *cond = geniCodeRValue (ast2iCode (tree->left,lvl+1), FALSE);
3437 value *caseVals = tree->values.switchVals.swVals;
3438 symbol *trueLabel, *falseLabel;
3440 /* If the condition is a literal, then just jump to the */
3441 /* appropriate case label. */
3442 if (IS_LITERAL(getSpec(operandType(cond))))
3444 int switchVal, caseVal;
3446 switchVal = (int) floatFromVal (cond->operand.valOperand);
3449 caseVal = (int) floatFromVal (caseVals);
3450 if (caseVal == switchVal)
3452 SNPRINTF (buffer, sizeof(buffer), "_case_%d_%d",
3453 tree->values.switchVals.swNum, caseVal);
3454 trueLabel = newiTempLabel (buffer);
3455 geniCodeGoto (trueLabel);
3458 caseVals = caseVals->next;
3460 goto defaultOrBreak;
3463 /* if we can make this a jump table */
3464 if (geniCodeJumpTable (cond, caseVals, tree))
3465 goto jumpTable; /* no need for the comparison */
3467 /* for the cases defined do */
3471 operand *compare = geniCodeLogic (cond,
3472 operandFromValue (caseVals),
3475 SNPRINTF (buffer, sizeof(buffer), "_case_%d_%d",
3476 tree->values.switchVals.swNum,
3477 (int) floatFromVal (caseVals));
3478 trueLabel = newiTempLabel (buffer);
3480 ic = newiCodeCondition (compare, trueLabel, NULL);
3482 caseVals = caseVals->next;
3487 /* if default is present then goto break else break */
3488 if (tree->values.switchVals.swDefault)
3490 SNPRINTF (buffer, sizeof(buffer), "_default_%d", tree->values.switchVals.swNum);
3494 SNPRINTF (buffer, sizeof(buffer), "_swBrk_%d", tree->values.switchVals.swNum);
3497 falseLabel = newiTempLabel (buffer);
3498 geniCodeGoto (falseLabel);
3501 ast2iCode (tree->right,lvl+1);
3504 /*-----------------------------------------------------------------*/
3505 /* geniCodeInline - intermediate code for inline assembler */
3506 /*-----------------------------------------------------------------*/
3508 geniCodeInline (ast * tree)
3512 ic = newiCode (INLINEASM, NULL, NULL);
3513 IC_INLINE (ic) = tree->values.inlineasm;
3517 /*-----------------------------------------------------------------*/
3518 /* geniCodeArrayInit - intermediate code for array initializer */
3519 /*-----------------------------------------------------------------*/
3521 geniCodeArrayInit (ast * tree, operand *array)
3525 if (!getenv("TRY_THE_NEW_INITIALIZER")) {
3526 ic = newiCode (ARRAYINIT, array, NULL);
3527 IC_ARRAYILIST (ic) = tree->values.constlist;
3529 operand *left=newOperand(), *right=newOperand();
3530 left->type=right->type=SYMBOL;
3531 OP_SYMBOL(left)=AST_SYMBOL(tree->left);
3532 OP_SYMBOL(right)=AST_SYMBOL(tree->right);
3533 ic = newiCode (ARRAYINIT, left, right);
3538 /*-----------------------------------------------------------------*/
3539 /* geniCodeCritical - intermediate code for a critical statement */
3540 /*-----------------------------------------------------------------*/
3542 geniCodeCritical (ast *tree, int lvl)
3547 /* If op is NULL, the original interrupt state will saved on */
3548 /* the stack. Otherwise, it will be saved in op. */
3550 /* Generate a save of the current interrupt state & disabled */
3551 ic = newiCode (CRITICAL, NULL, NULL);
3552 IC_RESULT (ic) = op;
3555 /* Generate the critical code sequence */
3556 if (tree->left && tree->left->type == EX_VALUE)
3557 geniCodeDummyRead (ast2iCode (tree->left,lvl+1));
3559 ast2iCode (tree->left,lvl+1);
3561 /* Generate a restore of the original interrupt state */
3562 ic = newiCode (ENDCRITICAL, NULL, op);
3566 /*-----------------------------------------------------------------*/
3567 /* Stuff used in ast2iCode to modify geniCodeDerefPtr in some */
3568 /* particular case. Ie : assigning or dereferencing array or ptr */
3569 /*-----------------------------------------------------------------*/
3570 set * lvaluereqSet = NULL;
3571 typedef struct lvalItem
3578 /*-----------------------------------------------------------------*/
3579 /* addLvaluereq - add a flag for lvalreq for current ast level */
3580 /*-----------------------------------------------------------------*/
3581 void addLvaluereq(int lvl)
3583 lvalItem * lpItem = (lvalItem *)Safe_alloc ( sizeof (lvalItem));
3586 addSetHead(&lvaluereqSet,lpItem);
3589 /*-----------------------------------------------------------------*/
3590 /* delLvaluereq - del a flag for lvalreq for current ast level */
3591 /*-----------------------------------------------------------------*/
3595 lpItem = getSet(&lvaluereqSet);
3596 if(lpItem) Safe_free(lpItem);
3598 /*-----------------------------------------------------------------*/
3599 /* clearLvaluereq - clear lvalreq flag */
3600 /*-----------------------------------------------------------------*/
3601 void clearLvaluereq()
3604 lpItem = peekSet(lvaluereqSet);
3605 if(lpItem) lpItem->req = 0;
3607 /*-----------------------------------------------------------------*/
3608 /* getLvaluereq - get the last lvalreq level */
3609 /*-----------------------------------------------------------------*/
3610 int getLvaluereqLvl()
3613 lpItem = peekSet(lvaluereqSet);
3614 if(lpItem) return lpItem->lvl;
3617 /*-----------------------------------------------------------------*/
3618 /* isLvaluereq - is lvalreq valid for this level ? */
3619 /*-----------------------------------------------------------------*/
3620 int isLvaluereq(int lvl)
3623 lpItem = peekSet(lvaluereqSet);
3624 if(lpItem) return ((lpItem->req)&&(lvl <= (lpItem->lvl+1)));
3628 /*-----------------------------------------------------------------*/
3629 /* ast2iCode - creates an icodeList from an ast */
3630 /*-----------------------------------------------------------------*/
3632 ast2iCode (ast * tree,int lvl)
3634 operand *left = NULL;
3635 operand *right = NULL;
3639 /* set the global variables for filename & line number */
3641 filename = tree->filename;
3643 lineno = tree->lineno;
3645 block = tree->block;
3647 scopeLevel = tree->level;
3649 seqPoint = tree->seqPoint;
3651 if (tree->type == EX_VALUE)
3652 return operandFromValue (tree->opval.val);
3654 if (tree->type == EX_LINK)
3655 return operandFromLink (tree->opval.lnk);
3657 /* if we find a nullop */
3658 if (tree->type == EX_OP &&
3659 (tree->opval.op == NULLOP ||
3660 tree->opval.op == BLOCK))
3662 if (tree->left && tree->left->type == EX_VALUE)
3663 geniCodeDummyRead (ast2iCode (tree->left,lvl+1));
3665 ast2iCode (tree->left,lvl+1);
3666 if (tree->right && tree->right->type == EX_VALUE)
3667 geniCodeDummyRead (ast2iCode (tree->right,lvl+1));
3669 ast2iCode (tree->right,lvl+1);
3673 /* special cases for not evaluating */
3674 if (tree->opval.op != ':' &&
3675 tree->opval.op != '?' &&
3676 tree->opval.op != CALL &&
3677 tree->opval.op != IFX &&
3678 tree->opval.op != LABEL &&
3679 tree->opval.op != GOTO &&
3680 tree->opval.op != SWITCH &&
3681 tree->opval.op != FUNCTION &&
3682 tree->opval.op != INLINEASM &&
3683 tree->opval.op != CRITICAL)
3686 if (IS_ASSIGN_OP (tree->opval.op) ||
3687 IS_DEREF_OP (tree) ||
3688 (tree->opval.op == '&' && !tree->right) ||
3689 tree->opval.op == PTR_OP)
3692 if ((IS_ARRAY_OP (tree->left) && IS_ARRAY_OP (tree->left->left)) ||
3693 (IS_DEREF_OP (tree) && IS_ARRAY_OP (tree->left)))
3696 left = operandFromAst (tree->left,lvl);
3698 if (IS_DEREF_OP (tree) && IS_DEREF_OP (tree->left))
3699 left = geniCodeRValue (left, TRUE);
3703 left = operandFromAst (tree->left,lvl);
3705 if (tree->opval.op == INC_OP ||
3706 tree->opval.op == DEC_OP)
3709 right = operandFromAst (tree->right,lvl);
3714 right = operandFromAst (tree->right,lvl);
3718 /* now depending on the type of operand */
3719 /* this will be a biggy */
3720 switch (tree->opval.op)
3723 case '[': /* array operation */
3725 //sym_link *ltype = operandType (left);
3726 //left = geniCodeRValue (left, IS_PTR (ltype->next) ? TRUE : FALSE);
3727 left = geniCodeRValue (left, FALSE);
3728 right = geniCodeRValue (right, TRUE);
3731 return geniCodeArray (left, right,lvl);
3733 case '.': /* structure dereference */
3734 if (IS_PTR (operandType (left)))
3735 left = geniCodeRValue (left, TRUE);
3737 left = geniCodeRValue (left, FALSE);
3739 return geniCodeStruct (left, right, tree->lvalue);
3741 case PTR_OP: /* structure pointer dereference */
3744 pType = operandType (left);
3745 left = geniCodeRValue (left, TRUE);
3747 setOClass (pType, getSpec (operandType (left)));
3750 return geniCodeStruct (left, right, tree->lvalue);
3752 case INC_OP: /* increment operator */
3754 return geniCodePostInc (left);
3756 return geniCodePreInc (right, tree->lvalue);
3758 case DEC_OP: /* decrement operator */
3760 return geniCodePostDec (left);
3762 return geniCodePreDec (right, tree->lvalue);
3764 case '&': /* bitwise and or address of operator */
3766 { /* this is a bitwise operator */
3767 left = geniCodeRValue (left, FALSE);
3768 right = geniCodeRValue (right, FALSE);
3769 return geniCodeBitwise (left, right, BITWISEAND, tree->ftype);
3772 return geniCodeAddressOf (left);
3774 case '|': /* bitwise or & xor */
3776 return geniCodeBitwise (geniCodeRValue (left, FALSE),
3777 geniCodeRValue (right, FALSE),
3782 return geniCodeDivision (geniCodeRValue (left, FALSE),
3783 geniCodeRValue (right, FALSE));
3786 return geniCodeModulus (geniCodeRValue (left, FALSE),
3787 geniCodeRValue (right, FALSE));
3790 return geniCodeMultiply (geniCodeRValue (left, FALSE),
3791 geniCodeRValue (right, FALSE),IS_INT(tree->ftype));
3793 return geniCodeDerefPtr (geniCodeRValue (left, FALSE),lvl);
3797 return geniCodeSubtract (geniCodeRValue (left, FALSE),
3798 geniCodeRValue (right, FALSE));
3800 return geniCodeUnaryMinus (geniCodeRValue (left, FALSE));
3804 return geniCodeAdd (geniCodeRValue (left, FALSE),
3805 geniCodeRValue (right, FALSE),lvl);
3807 return geniCodeRValue (left, FALSE); /* unary '+' has no meaning */
3810 return geniCodeLeftShift (geniCodeRValue (left, FALSE),
3811 geniCodeRValue (right, FALSE));
3814 return geniCodeRightShift (geniCodeRValue (left, FALSE),
3815 geniCodeRValue (right, FALSE));
3817 #if 0 // this indeed needs a second thought
3821 // let's keep this simple: get the rvalue we need
3822 op=geniCodeRValue (right, FALSE);
3823 // now cast it to whatever we want
3824 op=geniCodeCast (operandType(left), op, FALSE);
3825 // if this is going to be used as an lvalue, make it so
3831 #else // bug #604575, is it a bug ????
3832 return geniCodeCast (operandType (left),
3833 geniCodeRValue (right, FALSE), FALSE);
3840 return geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3845 operand *op = geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3846 setOperandType (op, UCHARTYPE);
3857 /* different compilers (even different gccs) evaluate
3858 the two calls in a different order. to get the same
3859 result on all machines we've to specify a clear sequence.
3860 return geniCodeLogic (geniCodeRValue (left, FALSE),
3861 geniCodeRValue (right, FALSE),
3865 operand *leftOp, *rightOp;
3867 rightOp = geniCodeRValue (right, FALSE);
3868 leftOp = geniCodeRValue (left , FALSE);
3870 return geniCodeLogic (leftOp, rightOp, tree->opval.op);
3873 return geniCodeConditional (tree,lvl);
3876 return operandFromLit (getSize (tree->right->ftype));
3880 sym_link *rtype = operandType (right);
3881 sym_link *ltype = operandType (left);
3882 if (IS_PTR (rtype) && IS_ITEMP (right)
3883 && right->isaddr && compareType (rtype->next, ltype) == 1)
3884 right = geniCodeRValue (right, TRUE);
3886 right = geniCodeRValue (right, FALSE);
3888 geniCodeAssign (left, right, 0);
3893 geniCodeAssign (left,
3894 geniCodeMultiply (geniCodeRValue (operandFromOperand (left),
3896 geniCodeRValue (right, FALSE),FALSE), 0);
3900 geniCodeAssign (left,
3901 geniCodeDivision (geniCodeRValue (operandFromOperand (left),
3903 geniCodeRValue (right, FALSE)), 0);
3906 geniCodeAssign (left,
3907 geniCodeModulus (geniCodeRValue (operandFromOperand (left),
3909 geniCodeRValue (right, FALSE)), 0);
3912 sym_link *rtype = operandType (right);
3913 sym_link *ltype = operandType (left);
3914 if (IS_PTR (rtype) && IS_ITEMP (right)
3915 && right->isaddr && compareType (rtype->next, ltype) == 1)
3916 right = geniCodeRValue (right, TRUE);
3918 right = geniCodeRValue (right, FALSE);
3921 return geniCodeAssign (left,
3922 geniCodeAdd (geniCodeRValue (operandFromOperand (left),
3928 sym_link *rtype = operandType (right);
3929 sym_link *ltype = operandType (left);
3930 if (IS_PTR (rtype) && IS_ITEMP (right)
3931 && right->isaddr && compareType (rtype->next, ltype) == 1)
3933 right = geniCodeRValue (right, TRUE);
3937 right = geniCodeRValue (right, FALSE);
3940 geniCodeAssign (left,
3941 geniCodeSubtract (geniCodeRValue (operandFromOperand (left),
3947 geniCodeAssign (left,
3948 geniCodeLeftShift (geniCodeRValue (operandFromOperand (left)
3950 geniCodeRValue (right, FALSE)), 0);
3953 geniCodeAssign (left,
3954 geniCodeRightShift (geniCodeRValue (operandFromOperand (left)
3956 geniCodeRValue (right, FALSE)), 0);
3959 geniCodeAssign (left,
3960 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3962 geniCodeRValue (right, FALSE),
3964 operandType (left)), 0);
3967 geniCodeAssign (left,
3968 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3970 geniCodeRValue (right, FALSE),
3972 operandType (left)), 0);
3975 geniCodeAssign (left,
3976 geniCodeBitwise (geniCodeRValue (operandFromOperand (left)
3978 geniCodeRValue (right, FALSE),
3980 operandType (left)), 0);
3982 return geniCodeRValue (right, FALSE);
3985 return geniCodeCall (ast2iCode (tree->left,lvl+1),
3988 geniCodeLabel (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3989 return ast2iCode (tree->right,lvl+1);
3992 geniCodeGoto (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3993 return ast2iCode (tree->right,lvl+1);
3996 geniCodeFunctionBody (tree,lvl);
4000 geniCodeReturn (right);
4004 geniCodeIfx (tree,lvl);
4008 geniCodeSwitch (tree,lvl);
4012 geniCodeInline (tree);
4016 geniCodeArrayInit(tree, ast2iCode (tree->left,lvl+1));
4020 geniCodeCritical (tree, lvl);
4026 /*-----------------------------------------------------------------*/
4027 /* reverseICChain - gets from the list and creates a linkedlist */
4028 /*-----------------------------------------------------------------*/
4035 while ((loop = getSet (&iCodeChain)))
4047 /*-----------------------------------------------------------------*/
4048 /* iCodeFromAst - given an ast will convert it to iCode */
4049 /*-----------------------------------------------------------------*/
4051 iCodeFromAst (ast * tree)
4053 returnLabel = newiTempLabel ("_return");
4054 entryLabel = newiTempLabel ("_entry");
4056 return reverseiCChain ();
4059 static const char *opTypeToStr(OPTYPE op)
4063 case SYMBOL: return "symbol";
4064 case VALUE: return "value";
4065 case TYPE: return "type";
4067 return "undefined type";
4071 operand *validateOpType(operand *op,
4078 if (op && op->type == type)
4083 "Internal error: validateOpType failed in %s(%s) @ %s:%u:"
4084 " expected %s, got %s\n",
4085 macro, args, file, line,
4086 opTypeToStr(type), op ? opTypeToStr(op->type) : "null op");
4088 return op; // never reached, makes compiler happy.