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 /*-----------------------------------------------------------------*/
1737 usualUnaryConversions (operand * op)
1739 if (IS_INTEGRAL (operandType (op)))
1741 if (getSize (operandType (op)) < (unsigned int) INTSIZE)
1744 return geniCodeCast (INTTYPE, op, TRUE);
1750 /*-----------------------------------------------------------------*/
1751 /* perform "usual binary conversions" */
1752 /*-----------------------------------------------------------------*/
1754 usualBinaryConversions (operand ** op1, operand ** op2,
1755 bool promoteCharToInt, bool isMul)
1758 sym_link *rtype = operandType (*op2);
1759 sym_link *ltype = operandType (*op1);
1761 ctype = computeType (ltype, rtype, promoteCharToInt);
1763 /* special for multiplication:
1764 This if for 'mul a,b', which takes two chars and returns an int */
1766 /* && promoteCharToInt superfluous, already handled by computeType() */
1767 && IS_INT (getSpec (ctype)))
1769 sym_link *retype = getSpec (rtype);
1770 sym_link *letype = getSpec (ltype);
1772 if ( IS_CHAR (letype)
1774 && IS_UNSIGNED (letype)
1775 && IS_UNSIGNED (retype))
1780 *op1 = geniCodeCast (ctype, *op1, TRUE);
1781 *op2 = geniCodeCast (ctype, *op2, TRUE);
1786 /*-----------------------------------------------------------------*/
1787 /* geniCodeValueAtAddress - generate intermeditate code for value */
1789 /*-----------------------------------------------------------------*/
1791 geniCodeRValue (operand * op, bool force)
1794 sym_link *type = operandType (op);
1795 sym_link *etype = getSpec (type);
1797 /* if this is an array & already */
1798 /* an address then return this */
1799 if (IS_AGGREGATE (type) ||
1800 (IS_PTR (type) && !force && !op->isaddr))
1801 return operandFromOperand (op);
1803 /* if this is not an address then must be */
1804 /* rvalue already so return this one */
1808 /* if this is not a temp symbol then */
1809 if (!IS_ITEMP (op) &&
1811 !(IN_FARSPACE (SPEC_OCLS (etype)) && !TARGET_IS_HC08))
1813 op = operandFromOperand (op);
1818 if (IS_SPEC (type) &&
1819 IS_TRUE_SYMOP (op) &&
1820 (!(IN_FARSPACE (SPEC_OCLS (etype)) && !TARGET_IS_HC08) ||
1821 (options.model == MODEL_FLAT24) ))
1823 op = operandFromOperand (op);
1828 ic = newiCode (GET_VALUE_AT_ADDRESS, op, NULL);
1829 if (IS_PTR (type) && op->isaddr && force)
1832 type = copyLinkChain (type);
1834 IC_RESULT (ic) = newiTempOperand (type, 1);
1835 IC_RESULT (ic)->isaddr = 0;
1837 /* ic->supportRtn = ((IS_GENPTR(type) | op->isGptr) & op->isaddr); */
1841 return IC_RESULT (ic);
1844 /*-----------------------------------------------------------------*/
1845 /* geniCodeCast - changes the value from one type to another */
1846 /*-----------------------------------------------------------------*/
1848 geniCodeCast (sym_link * type, operand * op, bool implicit)
1852 sym_link *opetype = getSpec (optype = operandType (op));
1856 /* one of them has size zero then error */
1857 if (IS_VOID (optype))
1859 werror (E_CAST_ZERO);
1863 /* if the operand is already the desired type then do nothing */
1864 if (compareType (type, optype) == 1)
1867 /* if this is a literal then just change the type & return */
1868 if (IS_LITERAL (opetype) && op->type == VALUE && !IS_PTR (type) && !IS_PTR (optype))
1870 return operandFromValue (valCastLiteral (type,
1871 operandLitValue (op)));
1874 /* if casting to/from pointers, do some checking */
1875 if (IS_PTR(type)) { // to a pointer
1876 if (!IS_PTR(optype) && !IS_FUNC(optype) && !IS_AGGREGATE(optype)) { // from a non pointer
1877 if (IS_INTEGRAL(optype)) {
1878 // maybe this is NULL, than it's ok.
1879 if (!(IS_LITERAL(optype) && (SPEC_CVAL(optype).v_ulong ==0))) {
1880 if (port->s.gptr_size > port->s.fptr_size && IS_GENPTR(type)) {
1881 // no way to set the storage
1882 if (IS_LITERAL(optype)) {
1883 werror(E_LITERAL_GENERIC);
1886 werror(E_NONPTR2_GENPTR);
1889 } else if (implicit) {
1890 werror(W_INTEGRAL2PTR_NOCAST);
1895 // shouldn't do that with float, array or structure unless to void
1896 if (!IS_VOID(getSpec(type)) &&
1897 !(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1898 werror(E_INCOMPAT_TYPES);
1902 } else { // from a pointer to a pointer
1903 if (port->s.gptr_size > port->s.fptr_size /*!TARGET_IS_Z80 && !TARGET_IS_GBZ80*/) {
1904 // if not a pointer to a function
1905 if (!(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1906 if (implicit) { // if not to generic, they have to match
1907 if ((!IS_GENPTR(type) && (DCL_TYPE(optype) != DCL_TYPE(type)))) {
1908 werror(E_INCOMPAT_PTYPES);
1915 } else { // to a non pointer
1916 if (IS_PTR(optype)) { // from a pointer
1917 if (implicit) { // sneaky
1918 if (IS_INTEGRAL(type)) {
1919 werror(W_PTR2INTEGRAL_NOCAST);
1921 } else { // shouldn't do that with float, array or structure
1922 werror(E_INCOMPAT_TYPES);
1929 printFromToType (optype, type);
1932 /* if they are the same size create an assignment */
1933 if (getSize (type) == getSize (optype) &&
1934 !IS_BITFIELD (type) &&
1936 !IS_FLOAT (optype) &&
1937 ((IS_SPEC (type) && IS_SPEC (optype)) ||
1938 (!IS_SPEC (type) && !IS_SPEC (optype))))
1940 ic = newiCode ('=', NULL, op);
1941 IC_RESULT (ic) = newiTempOperand (type, 0);
1942 SPIL_LOC (IC_RESULT (ic)) =
1943 (IS_TRUE_SYMOP (op) ? OP_SYMBOL (op) : NULL);
1944 IC_RESULT (ic)->isaddr = 0;
1948 ic = newiCode (CAST, operandFromLink (type),
1949 geniCodeRValue (op, FALSE));
1951 IC_RESULT (ic) = newiTempOperand (type, 0);
1954 /* preserve the storage class & output class */
1955 /* of the original variable */
1956 restype = getSpec (operandType (IC_RESULT (ic)));
1957 if (!IS_LITERAL(opetype))
1958 SPEC_SCLS (restype) = SPEC_SCLS (opetype);
1959 SPEC_OCLS (restype) = SPEC_OCLS (opetype);
1962 return IC_RESULT (ic);
1965 /*-----------------------------------------------------------------*/
1966 /* geniCodeLabel - will create a Label */
1967 /*-----------------------------------------------------------------*/
1969 geniCodeLabel (symbol * label)
1973 ic = newiCodeLabelGoto (LABEL, label);
1977 /*-----------------------------------------------------------------*/
1978 /* geniCodeGoto - will create a Goto */
1979 /*-----------------------------------------------------------------*/
1981 geniCodeGoto (symbol * label)
1985 ic = newiCodeLabelGoto (GOTO, label);
1989 /*-----------------------------------------------------------------*/
1990 /* geniCodeMultiply - gen intermediate code for multiplication */
1991 /*-----------------------------------------------------------------*/
1993 geniCodeMultiply (operand * left, operand * right, int resultIsInt)
2000 /* if they are both literal then we know the result */
2001 if (IS_LITERAL (letype) && IS_LITERAL (retype))
2002 return operandFromValue (valMult (left->operand.valOperand,
2003 right->operand.valOperand));
2005 if (IS_LITERAL(retype)) {
2006 p2 = powof2 ((TYPE_UDWORD) floatFromVal (right->operand.valOperand));
2009 resType = usualBinaryConversions (&left, &right, resultIsInt, TRUE);
2011 rtype = operandType (right);
2012 retype = getSpec (rtype);
2013 ltype = operandType (left);
2014 letype = getSpec (ltype);
2017 /* if the right is a literal & power of 2 */
2018 /* then make it a left shift */
2019 /* code generated for 1 byte * 1 byte literal = 2 bytes result is more
2020 efficient in most cases than 2 bytes result = 2 bytes << literal
2021 if port has 1 byte muldiv */
2022 if (p2 && !IS_FLOAT (letype) &&
2023 !((resultIsInt) && (getSize (resType) != getSize (ltype)) &&
2024 (port->support.muldiv == 1)))
2026 if ((resultIsInt) && (getSize (resType) != getSize (ltype)))
2028 /* LEFT_OP need same size for left and result, */
2029 left = geniCodeCast (resType, left, TRUE);
2030 ltype = operandType (left);
2032 ic = newiCode (LEFT_OP, left, operandFromLit (p2)); /* left shift */
2036 ic = newiCode ('*', left, right); /* normal multiplication */
2037 /* if the size left or right > 1 then support routine */
2038 if (getSize (ltype) > 1 || getSize (rtype) > 1)
2042 IC_RESULT (ic) = newiTempOperand (resType, 1);
2045 return IC_RESULT (ic);
2048 /*-----------------------------------------------------------------*/
2049 /* geniCodeDivision - gen intermediate code for division */
2050 /*-----------------------------------------------------------------*/
2052 geniCodeDivision (operand * left, operand * right)
2057 sym_link *rtype = operandType (right);
2058 sym_link *retype = getSpec (rtype);
2059 sym_link *ltype = operandType (left);
2060 sym_link *letype = getSpec (ltype);
2062 resType = usualBinaryConversions (&left, &right, TRUE, FALSE);
2064 /* if the right is a literal & power of 2
2065 and left is unsigned then make it a
2067 if (IS_LITERAL (retype) &&
2068 !IS_FLOAT (letype) &&
2069 IS_UNSIGNED(letype) &&
2070 (p2 = powof2 ((TYPE_UDWORD)
2071 floatFromVal (right->operand.valOperand)))) {
2072 ic = newiCode (RIGHT_OP, left, operandFromLit (p2)); /* right shift */
2076 ic = newiCode ('/', left, right); /* normal division */
2077 /* if the size left or right > 1 then support routine */
2078 if (getSize (ltype) > 1 || getSize (rtype) > 1)
2081 IC_RESULT (ic) = newiTempOperand (resType, 0);
2084 return IC_RESULT (ic);
2086 /*-----------------------------------------------------------------*/
2087 /* geniCodeModulus - gen intermediate code for modulus */
2088 /*-----------------------------------------------------------------*/
2090 geniCodeModulus (operand * left, operand * right)
2096 /* if they are both literal then we know the result */
2097 if (IS_LITERAL (letype) && IS_LITERAL (retype))
2098 return operandFromValue (valMod (left->operand.valOperand,
2099 right->operand.valOperand));
2101 resType = usualBinaryConversions (&left, &right, TRUE, FALSE);
2103 /* now they are the same size */
2104 ic = newiCode ('%', left, right);
2106 /* if the size left or right > 1 then support routine */
2107 if (getSize (ltype) > 1 || getSize (rtype) > 1)
2109 IC_RESULT (ic) = newiTempOperand (resType, 0);
2112 return IC_RESULT (ic);
2115 /*-----------------------------------------------------------------*/
2116 /* geniCodePtrPtrSubtract - subtracts pointer from pointer */
2117 /*-----------------------------------------------------------------*/
2119 geniCodePtrPtrSubtract (operand * left, operand * right)
2125 /* if they are both literals then */
2126 if (IS_LITERAL (letype) && IS_LITERAL (retype))
2128 result = operandFromValue (valMinus (left->operand.valOperand,
2129 right->operand.valOperand));
2133 ic = newiCode ('-', left, right);
2135 IC_RESULT (ic) = result = newiTempOperand (newIntLink (), 1);
2139 if (IS_VOID(ltype->next) || IS_VOID(rtype->next)) {
2143 // should we really do this? is this ANSI?
2144 return geniCodeDivision (result,
2145 operandFromLit (getSize (ltype->next)));
2148 /*-----------------------------------------------------------------*/
2149 /* geniCodeSubtract - generates code for subtraction */
2150 /*-----------------------------------------------------------------*/
2152 geniCodeSubtract (operand * left, operand * right)
2159 /* if they both pointers then */
2160 if ((IS_PTR (ltype) || IS_ARRAY (ltype)) &&
2161 (IS_PTR (rtype) || IS_ARRAY (rtype)))
2162 return geniCodePtrPtrSubtract (left, right);
2164 /* if they are both literal then we know the result */
2165 if (IS_LITERAL (letype) && IS_LITERAL (retype)
2166 && left->isLiteral && right->isLiteral)
2167 return operandFromValue (valMinus (left->operand.valOperand,
2168 right->operand.valOperand));
2170 /* if left is an array or pointer */
2171 if (IS_PTR (ltype) || IS_ARRAY (ltype))
2173 isarray = left->isaddr;
2174 right = geniCodeMultiply (right,
2175 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
2176 resType = copyLinkChain (IS_ARRAY (ltype) ? ltype->next : ltype);
2179 { /* make them the same size */
2180 resType = usualBinaryConversions (&left, &right, FALSE, FALSE);
2183 ic = newiCode ('-', left, right);
2185 IC_RESULT (ic) = newiTempOperand (resType, 1);
2186 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
2188 /* if left or right is a float */
2189 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
2193 return IC_RESULT (ic);
2196 /*-----------------------------------------------------------------*/
2197 /* geniCodeAdd - generates iCode for addition */
2198 /*-----------------------------------------------------------------*/
2200 geniCodeAdd (operand * left, operand * right, int lvl)
2209 /* if the right side is LITERAL zero */
2210 /* return the left side */
2211 if (IS_LITERAL (retype) && right->isLiteral && !floatFromVal (valFromType (rtype)))
2214 /* if left is literal zero return right */
2215 if (IS_LITERAL (letype) && left->isLiteral && !floatFromVal (valFromType (ltype)))
2218 /* if left is a pointer then size */
2219 if (IS_PTR (ltype) || IS_ARRAY(ltype))
2221 isarray = left->isaddr;
2222 // there is no need to multiply with 1
2223 if (getSize (ltype->next) != 1)
2225 size = operandFromLit (getSize (ltype->next));
2226 SPEC_USIGN (getSpec (operandType (size))) = 1;
2227 indexUnsigned = IS_UNSIGNED (getSpec (operandType (right)));
2228 right = geniCodeMultiply (right, size, (getArraySizePtr(left) >= INTSIZE));
2229 /* Even if right is a 'unsigned char',
2230 the result will be a 'signed int' due to the promotion rules.
2231 It doesn't make sense when accessing arrays, so let's fix it here: */
2233 SPEC_USIGN (getSpec (operandType (right))) = 1;
2235 resType = copyLinkChain (ltype);
2238 { // make them the same size
2239 resType = usualBinaryConversions (&left, &right, FALSE, FALSE);
2242 /* if they are both literals then we know */
2243 if (IS_LITERAL (letype) && IS_LITERAL (retype)
2244 && left->isLiteral && right->isLiteral)
2245 return operandFromValue (valPlus (valFromType (ltype),
2246 valFromType (rtype)));
2248 ic = newiCode ('+', left, right);
2250 IC_RESULT (ic) = newiTempOperand (resType, 1);
2251 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
2253 /* if left or right is a float then support
2255 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
2260 return IC_RESULT (ic);
2264 /*-----------------------------------------------------------------*/
2265 /* aggrToPtr - changes an aggregate to pointer to an aggregate */
2266 /*-----------------------------------------------------------------*/
2268 aggrToPtr (sym_link * type, bool force)
2273 if (IS_PTR (type) && !force)
2276 etype = getSpec (type);
2277 ptype = newLink (DECLARATOR);
2281 /* set the pointer depending on the storage class */
2282 DCL_TYPE (ptype) = PTR_TYPE (SPEC_OCLS (etype));
2286 /*-----------------------------------------------------------------*/
2287 /* geniCodeArray2Ptr - array to pointer */
2288 /*-----------------------------------------------------------------*/
2290 geniCodeArray2Ptr (operand * op)
2292 sym_link *optype = operandType (op);
2293 sym_link *opetype = getSpec (optype);
2295 /* set the pointer depending on the storage class */
2296 DCL_TYPE (optype) = PTR_TYPE (SPEC_OCLS (opetype));
2303 /*-----------------------------------------------------------------*/
2304 /* geniCodeArray - array access */
2305 /*-----------------------------------------------------------------*/
2307 geniCodeArray (operand * left, operand * right,int lvl)
2311 sym_link *ltype = operandType (left);
2316 if (IS_PTR (ltype->next) && left->isaddr)
2318 left = geniCodeRValue (left, FALSE);
2321 return geniCodeDerefPtr (geniCodeAdd (left, right, lvl), lvl);
2323 size = operandFromLit (getSize (ltype->next));
2324 SPEC_USIGN (getSpec (operandType (size))) = 1;
2325 indexUnsigned = IS_UNSIGNED (getSpec (operandType (right)));
2326 right = geniCodeMultiply (right, size, (getArraySizePtr(left) >= INTSIZE));
2327 /* Even if right is a 'unsigned char', the result will be a 'signed int' due to the promotion rules.
2328 It doesn't make sense when accessing arrays, so let's fix it here: */
2330 SPEC_USIGN (getSpec (operandType (right))) = 1;
2331 /* we can check for limits here */
2332 if (isOperandLiteral (right) &&
2335 (operandLitValue (right) / getSize (ltype->next)) >= DCL_ELEM (ltype))
2337 werror (E_ARRAY_BOUND);
2338 right = operandFromLit (0);
2341 ic = newiCode ('+', left, right);
2343 IC_RESULT (ic) = newiTempOperand (((IS_PTR (ltype) &&
2344 !IS_AGGREGATE (ltype->next) &&
2345 !IS_PTR (ltype->next))
2346 ? ltype : ltype->next), 0);
2348 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (ltype->next));
2351 return IC_RESULT (ic);
2354 /*-----------------------------------------------------------------*/
2355 /* geniCodeStruct - generates intermediate code for structures */
2356 /*-----------------------------------------------------------------*/
2358 geniCodeStruct (operand * left, operand * right, bool islval)
2361 sym_link *type = operandType (left);
2362 sym_link *etype = getSpec (type);
2364 symbol *element = getStructElement (SPEC_STRUCT (etype),
2365 right->operand.symOperand);
2367 wassert(IS_SYMOP(right));
2369 /* add the offset */
2370 ic = newiCode ('+', left, operandFromLit (element->offset));
2372 IC_RESULT (ic) = newiTempOperand (element->type, 0);
2374 /* preserve the storage & output class of the struct */
2375 /* as well as the volatile attribute */
2376 retype = getSpec (operandType (IC_RESULT (ic)));
2377 SPEC_SCLS (retype) = SPEC_SCLS (etype);
2378 SPEC_OCLS (retype) = SPEC_OCLS (etype);
2379 SPEC_VOLATILE (retype) |= SPEC_VOLATILE (etype);
2380 SPEC_CONST (retype) |= SPEC_CONST (etype);
2382 if (IS_PTR (element->type))
2383 setOperandType (IC_RESULT (ic), aggrToPtr (operandType (IC_RESULT (ic)), TRUE));
2385 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (element->type));
2388 return (islval ? IC_RESULT (ic) : geniCodeRValue (IC_RESULT (ic), TRUE));
2391 /*-----------------------------------------------------------------*/
2392 /* geniCodePostInc - generate int code for Post increment */
2393 /*-----------------------------------------------------------------*/
2395 geniCodePostInc (operand * op)
2399 sym_link *optype = operandType (op);
2401 operand *rv = (IS_ITEMP (op) ?
2402 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2404 sym_link *rvtype = operandType (rv);
2407 /* if this is not an address we have trouble */
2410 werror (E_LVALUE_REQUIRED, "++");
2414 rOp = newiTempOperand (rvtype, 0);
2415 OP_SYMBOL(rOp)->noSpilLoc = 1;
2418 OP_SYMBOL(rv)->noSpilLoc = 1;
2420 geniCodeAssign (rOp, rv, 0);
2422 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2423 if (IS_FLOAT (rvtype))
2424 ic = newiCode ('+', rv, operandFromValue (constFloatVal ("1.0")));
2426 ic = newiCode ('+', rv, operandFromLit (size));
2428 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2431 geniCodeAssign (op, result, 0);
2437 /*-----------------------------------------------------------------*/
2438 /* geniCodePreInc - generate code for preIncrement */
2439 /*-----------------------------------------------------------------*/
2441 geniCodePreInc (operand * op, bool lvalue)
2444 sym_link *optype = operandType (op);
2445 operand *rop = (IS_ITEMP (op) ?
2446 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2448 sym_link *roptype = operandType (rop);
2454 werror (E_LVALUE_REQUIRED, "++");
2459 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2460 if (IS_FLOAT (roptype))
2461 ic = newiCode ('+', rop, operandFromValue (constFloatVal ("1.0")));
2463 ic = newiCode ('+', rop, operandFromLit (size));
2464 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2467 (void) geniCodeAssign (op, result, 0);
2468 if (lvalue || IS_TRUE_SYMOP (op))
2474 /*-----------------------------------------------------------------*/
2475 /* geniCodePostDec - generates code for Post decrement */
2476 /*-----------------------------------------------------------------*/
2478 geniCodePostDec (operand * op)
2482 sym_link *optype = operandType (op);
2484 operand *rv = (IS_ITEMP (op) ?
2485 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2487 sym_link *rvtype = operandType (rv);
2490 /* if this is not an address we have trouble */
2493 werror (E_LVALUE_REQUIRED, "--");
2497 rOp = newiTempOperand (rvtype, 0);
2498 OP_SYMBOL(rOp)->noSpilLoc = 1;
2501 OP_SYMBOL(rv)->noSpilLoc = 1;
2503 geniCodeAssign (rOp, rv, 0);
2505 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2506 if (IS_FLOAT (rvtype))
2507 ic = newiCode ('-', rv, operandFromValue (constFloatVal ("1.0")));
2509 ic = newiCode ('-', rv, operandFromLit (size));
2511 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2514 geniCodeAssign (op, result, 0);
2520 /*-----------------------------------------------------------------*/
2521 /* geniCodePreDec - generate code for pre decrement */
2522 /*-----------------------------------------------------------------*/
2524 geniCodePreDec (operand * op, bool lvalue)
2527 sym_link *optype = operandType (op);
2528 operand *rop = (IS_ITEMP (op) ?
2529 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2531 sym_link *roptype = operandType (rop);
2537 werror (E_LVALUE_REQUIRED, "--");
2542 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2543 if (IS_FLOAT (roptype))
2544 ic = newiCode ('-', rop, operandFromValue (constFloatVal ("1.0")));
2546 ic = newiCode ('-', rop, operandFromLit (size));
2547 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2550 (void) geniCodeAssign (op, result, 0);
2551 if (lvalue || IS_TRUE_SYMOP (op))
2558 /*-----------------------------------------------------------------*/
2559 /* geniCodeBitwise - gen int code for bitWise operators */
2560 /*-----------------------------------------------------------------*/
2562 geniCodeBitwise (operand * left, operand * right,
2563 int oper, sym_link * resType)
2567 left = geniCodeCast (resType, left, TRUE);
2568 right = geniCodeCast (resType, right, TRUE);
2570 ic = newiCode (oper, left, right);
2571 IC_RESULT (ic) = newiTempOperand (resType, 0);
2574 return IC_RESULT (ic);
2577 /*-----------------------------------------------------------------*/
2578 /* geniCodeAddressOf - gens icode for '&' address of operator */
2579 /*-----------------------------------------------------------------*/
2581 geniCodeAddressOf (operand * op)
2585 sym_link *optype = operandType (op);
2586 sym_link *opetype = getSpec (optype);
2588 if (IS_ITEMP (op) && op->isaddr && IS_PTR (optype))
2590 op = operandFromOperand (op);
2595 /* lvalue check already done in decorateType */
2596 /* this must be a lvalue */
2597 /* if (!op->isaddr && !IS_AGGREGATE(optype)) { */
2598 /* werror (E_LVALUE_REQUIRED,"&"); */
2602 p = newLink (DECLARATOR);
2604 /* set the pointer depending on the storage class */
2605 DCL_TYPE (p) = PTR_TYPE (SPEC_OCLS (opetype));
2607 p->next = copyLinkChain (optype);
2609 /* if already a temp */
2612 setOperandType (op, p);
2617 /* other wise make this of the type coming in */
2618 ic = newiCode (ADDRESS_OF, op, NULL);
2619 IC_RESULT (ic) = newiTempOperand (p, 1);
2620 IC_RESULT (ic)->isaddr = 0;
2622 return IC_RESULT (ic);
2624 /*-----------------------------------------------------------------*/
2625 /* setOClass - sets the output class depending on the pointer type */
2626 /*-----------------------------------------------------------------*/
2628 setOClass (sym_link * ptr, sym_link * spec)
2630 switch (DCL_TYPE (ptr))
2633 SPEC_OCLS (spec) = data;
2637 SPEC_OCLS (spec) = generic;
2641 SPEC_OCLS (spec) = xdata;
2645 SPEC_OCLS (spec) = code;
2649 SPEC_OCLS (spec) = idata;
2653 SPEC_OCLS (spec) = xstack;
2657 SPEC_OCLS (spec) = eeprom;
2666 /*-----------------------------------------------------------------*/
2667 /* geniCodeDerefPtr - dereference pointer with '*' */
2668 /*-----------------------------------------------------------------*/
2670 geniCodeDerefPtr (operand * op,int lvl)
2672 sym_link *rtype, *retype;
2673 sym_link *optype = operandType (op);
2675 // if this is an array then array access
2676 if (IS_ARRAY (optype)) {
2677 // don't worry, this will be optimized out later
2678 return geniCodeArray (op, operandFromLit (0), lvl);
2681 // just in case someone screws up
2682 wassert (IS_PTR (optype));
2684 if (IS_TRUE_SYMOP (op))
2687 op = geniCodeRValue (op, TRUE);
2690 /* now get rid of the pointer part */
2691 if (isLvaluereq(lvl) && IS_ITEMP (op))
2693 retype = getSpec (rtype = copyLinkChain (optype));
2697 retype = getSpec (rtype = copyLinkChain (optype->next));
2698 /* outputclass needs 2b updated */
2699 setOClass (optype, retype);
2702 op->isGptr = IS_GENPTR (optype);
2704 op->isaddr = (IS_PTR (rtype) ||
2705 IS_STRUCT (rtype) ||
2710 if (!isLvaluereq(lvl))
2711 op = geniCodeRValue (op, TRUE);
2713 setOperandType (op, rtype);
2718 /*-----------------------------------------------------------------*/
2719 /* geniCodeUnaryMinus - does a unary minus of the operand */
2720 /*-----------------------------------------------------------------*/
2722 geniCodeUnaryMinus (operand * op)
2725 sym_link *optype = operandType (op);
2727 if (IS_LITERAL (optype))
2728 return operandFromLit (-floatFromVal (op->operand.valOperand));
2730 ic = newiCode (UNARYMINUS, op, NULL);
2731 IC_RESULT (ic) = newiTempOperand (optype, 0);
2733 return IC_RESULT (ic);
2736 /*-----------------------------------------------------------------*/
2737 /* geniCodeLeftShift - gen i code for left shift */
2738 /*-----------------------------------------------------------------*/
2740 geniCodeLeftShift (operand * left, operand * right)
2744 left = usualUnaryConversions (left);
2745 ic = newiCode (LEFT_OP, left, right);
2746 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2748 return IC_RESULT (ic);
2751 /*-----------------------------------------------------------------*/
2752 /* geniCodeRightShift - gen i code for right shift */
2753 /*-----------------------------------------------------------------*/
2755 geniCodeRightShift (operand * left, operand * right)
2759 ic = newiCode (RIGHT_OP, left, right);
2760 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2762 return IC_RESULT (ic);
2765 /*-----------------------------------------------------------------*/
2766 /* geniCodeLogic- logic code */
2767 /*-----------------------------------------------------------------*/
2769 geniCodeLogic (operand * left, operand * right, int op)
2773 sym_link *rtype = operandType (right);
2774 sym_link *ltype = operandType (left);
2776 /* left is integral type and right is literal then
2777 check if the literal value is within bounds */
2778 if (IS_INTEGRAL (ltype) && IS_VALOP (right) && IS_LITERAL (rtype))
2780 checkConstantRange(ltype,
2781 OP_VALUE(right), "compare operation", 1);
2784 /* if one operand is a pointer and the other is a literal generic void pointer,
2785 change the type of the literal generic void pointer to match the other pointer */
2786 if (IS_GENPTR (ltype) && IS_VOID (ltype->next) && IS_ITEMP (left)
2787 && IS_PTR (rtype) && !IS_GENPTR(rtype))
2789 /* find left's definition */
2790 ic = (iCode *) setFirstItem (iCodeChain);
2793 if (((ic->op == CAST) || (ic->op == '='))
2794 && isOperandEqual(left, IC_RESULT (ic)))
2797 ic = setNextItem (iCodeChain);
2799 /* if casting literal to generic pointer, then cast to rtype instead */
2800 if (ic && (ic->op == CAST) && isOperandLiteral(IC_RIGHT (ic)))
2802 left = operandFromValue (valCastLiteral (rtype, operandLitValue (IC_RIGHT (ic))));
2803 ltype = operandType(left);
2806 if (IS_GENPTR (rtype) && IS_VOID (rtype->next) && IS_ITEMP (right)
2807 && IS_PTR (ltype) && !IS_GENPTR(ltype))
2809 /* find right's definition */
2810 ic = (iCode *) setFirstItem (iCodeChain);
2813 if (((ic->op == CAST) || (ic->op == '='))
2814 && isOperandEqual(right, IC_RESULT (ic)))
2817 ic = setNextItem (iCodeChain);
2819 /* if casting literal to generic pointer, then cast to rtype instead */
2820 if (ic && (ic->op == CAST) && isOperandLiteral(IC_RIGHT (ic)))
2822 right = operandFromValue (valCastLiteral (ltype, operandLitValue (IC_RIGHT (ic))));
2823 rtype = operandType(right);
2827 ctype = usualBinaryConversions (&left, &right, FALSE, FALSE);
2829 ic = newiCode (op, left, right);
2830 IC_RESULT (ic) = newiTempOperand (newCharLink (), 1);
2832 /* if comparing float
2833 and not a '==' || '!=' || '&&' || '||' (these
2835 if (IS_FLOAT(ctype) &&
2843 return IC_RESULT (ic);
2846 /*-----------------------------------------------------------------*/
2847 /* geniCodeUnary - for a a generic unary operation */
2848 /*-----------------------------------------------------------------*/
2850 geniCodeUnary (operand * op, int oper)
2852 iCode *ic = newiCode (oper, op, NULL);
2854 IC_RESULT (ic) = newiTempOperand (operandType (op), 0);
2856 return IC_RESULT (ic);
2859 /*-----------------------------------------------------------------*/
2860 /* geniCodeConditional - geniCode for '?' ':' operation */
2861 /*-----------------------------------------------------------------*/
2863 geniCodeConditional (ast * tree,int lvl)
2866 symbol *falseLabel = newiTempLabel (NULL);
2867 symbol *exitLabel = newiTempLabel (NULL);
2868 operand *cond = ast2iCode (tree->left,lvl+1);
2869 operand *true, *false, *result;
2871 ic = newiCodeCondition (geniCodeRValue (cond, FALSE),
2875 true = ast2iCode (tree->right->left,lvl+1);
2877 /* move the value to a new Operand */
2878 result = newiTempOperand (tree->right->ftype, 0);
2879 geniCodeAssign (result, geniCodeRValue (true, FALSE), 0);
2881 /* generate an unconditional goto */
2882 geniCodeGoto (exitLabel);
2884 /* now for the right side */
2885 geniCodeLabel (falseLabel);
2887 false = ast2iCode (tree->right->right,lvl+1);
2888 geniCodeAssign (result, geniCodeRValue (false, FALSE), 0);
2890 /* create the exit label */
2891 geniCodeLabel (exitLabel);
2896 /*-----------------------------------------------------------------*/
2897 /* geniCodeAssign - generate code for assignment */
2898 /*-----------------------------------------------------------------*/
2900 geniCodeAssign (operand * left, operand * right, int nosupdate)
2903 sym_link *ltype = operandType (left);
2904 sym_link *rtype = operandType (right);
2906 if (!left->isaddr && !IS_ITEMP (left))
2908 werror (E_LVALUE_REQUIRED, "assignment");
2912 /* left is integral type and right is literal then
2913 check if the literal value is within bounds */
2914 if (IS_INTEGRAL (ltype) && right->type == VALUE && IS_LITERAL (rtype))
2916 checkConstantRange(ltype,
2917 OP_VALUE(right), "= operation", 0);
2920 /* if the left & right type don't exactly match */
2921 /* if pointer set then make sure the check is
2922 done with the type & not the pointer */
2923 /* then cast rights type to left */
2925 /* first check the type for pointer assignement */
2926 if (left->isaddr && IS_PTR (ltype) && IS_ITEMP (left) &&
2927 compareType (ltype, rtype) <= 0)
2929 if (compareType (ltype->next, rtype) < 0)
2930 right = geniCodeCast (ltype->next, right, TRUE);
2932 else if (compareType (ltype, rtype) < 0)
2933 right = geniCodeCast (ltype, right, TRUE);
2935 /* If left is a true symbol & ! volatile
2936 create an assignment to temporary for
2937 the right & then assign this temporary
2938 to the symbol. This is SSA (static single
2939 assignment). Isn't it simple and folks have
2940 published mountains of paper on it */
2941 if (IS_TRUE_SYMOP (left) &&
2942 !isOperandVolatile (left, FALSE) &&
2943 isOperandGlobal (left))
2947 if (IS_TRUE_SYMOP (right))
2948 sym = OP_SYMBOL (right);
2949 ic = newiCode ('=', NULL, right);
2950 IC_RESULT (ic) = right = newiTempOperand (ltype, 0);
2951 SPIL_LOC (right) = sym;
2955 ic = newiCode ('=', NULL, right);
2956 IC_RESULT (ic) = left;
2959 /* if left isgptr flag is set then support
2960 routine will be required */
2964 ic->nosupdate = nosupdate;
2968 /*-----------------------------------------------------------------*/
2969 /* geniCodeDummyRead - generate code for dummy read */
2970 /*-----------------------------------------------------------------*/
2972 geniCodeDummyRead (operand * op)
2975 sym_link *type = operandType (op);
2977 if (!IS_VOLATILE(type))
2980 ic = newiCode (DUMMY_READ_VOLATILE, NULL, op);
2986 /*-----------------------------------------------------------------*/
2987 /* geniCodeSEParms - generate code for side effecting fcalls */
2988 /*-----------------------------------------------------------------*/
2990 geniCodeSEParms (ast * parms,int lvl)
2995 if (parms->type == EX_OP && parms->opval.op == PARAM)
2997 geniCodeSEParms (parms->left,lvl);
2998 geniCodeSEParms (parms->right,lvl);
3002 /* hack don't like this but too lazy to think of
3004 if (IS_ADDRESS_OF_OP (parms))
3005 parms->left->lvalue = 1;
3007 if (IS_CAST_OP (parms) &&
3008 IS_PTR (parms->ftype) &&
3009 IS_ADDRESS_OF_OP (parms->right))
3010 parms->right->left->lvalue = 1;
3012 parms->opval.oprnd =
3013 geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
3015 parms->type = EX_OPERAND;
3016 AST_ARGREG(parms) = parms->etype ? SPEC_ARGREG(parms->etype) :
3017 SPEC_ARGREG(parms->ftype);
3020 /*-----------------------------------------------------------------*/
3021 /* geniCodeParms - generates parameters */
3022 /*-----------------------------------------------------------------*/
3024 geniCodeParms (ast * parms, value *argVals, int *stack,
3025 sym_link * fetype, symbol * func,int lvl)
3033 if (argVals==NULL) {
3035 argVals=FUNC_ARGS(func->type);
3038 /* if this is a param node then do the left & right */
3039 if (parms->type == EX_OP && parms->opval.op == PARAM)
3041 argVals=geniCodeParms (parms->left, argVals, stack, fetype, func,lvl);
3042 argVals=geniCodeParms (parms->right, argVals, stack, fetype, func,lvl);
3046 /* get the parameter value */
3047 if (parms->type == EX_OPERAND)
3048 pval = parms->opval.oprnd;
3051 /* maybe this else should go away ?? */
3052 /* hack don't like this but too lazy to think of
3054 if (IS_ADDRESS_OF_OP (parms))
3055 parms->left->lvalue = 1;
3057 if (IS_CAST_OP (parms) &&
3058 IS_PTR (parms->ftype) &&
3059 IS_ADDRESS_OF_OP (parms->right))
3060 parms->right->left->lvalue = 1;
3062 pval = geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
3065 /* if register parm then make it a send */
3066 if ((IS_REGPARM (parms->etype) && !IFFUNC_HASVARARGS(func->type)) ||
3067 IFFUNC_ISBUILTIN(func->type))
3069 ic = newiCode (SEND, pval, NULL);
3070 ic->argreg = SPEC_ARGREG(parms->etype);
3071 ic->builtinSEND = FUNC_ISBUILTIN(func->type);
3076 /* now decide whether to push or assign */
3077 if (!(options.stackAuto || IFFUNC_ISREENT (func->type)))
3081 operand *top = operandFromSymbol (argVals->sym);
3082 /* clear useDef and other bitVectors */
3083 OP_USES(top)=OP_DEFS(top)=OP_SYMBOL(top)->clashes = NULL;
3084 geniCodeAssign (top, pval, 1);
3088 sym_link *p = operandType (pval);
3090 ic = newiCode (IPUSH, pval, NULL);
3092 /* update the stack adjustment */
3093 *stack += getSize (IS_AGGREGATE (p) ? aggrToPtr (p, FALSE) : p);
3098 argVals=argVals->next;
3102 /*-----------------------------------------------------------------*/
3103 /* geniCodeCall - generates temp code for calling */
3104 /*-----------------------------------------------------------------*/
3106 geniCodeCall (operand * left, ast * parms,int lvl)
3110 sym_link *type, *etype;
3113 if (!IS_FUNC(OP_SYMBOL(left)->type) &&
3114 !IS_CODEPTR(OP_SYMBOL(left)->type)) {
3115 werror (E_FUNCTION_EXPECTED);
3116 return operandFromValue(valueFromLit(0));
3119 /* take care of parameters with side-effecting
3120 function calls in them, this is required to take care
3121 of overlaying function parameters */
3122 geniCodeSEParms (parms,lvl);
3124 /* first the parameters */
3125 geniCodeParms (parms, NULL, &stack, getSpec (operandType (left)), OP_SYMBOL (left),lvl);
3127 /* now call : if symbol then pcall */
3128 if (IS_OP_POINTER (left) || IS_ITEMP(left)) {
3129 ic = newiCode (PCALL, left, NULL);
3131 ic = newiCode (CALL, left, NULL);
3134 type = copyLinkChain (operandType (left)->next);
3135 etype = getSpec (type);
3136 SPEC_EXTR (etype) = 0;
3137 IC_RESULT (ic) = result = newiTempOperand (type, 1);
3141 /* stack adjustment after call */
3142 ic->parmBytes = stack;
3147 /*-----------------------------------------------------------------*/
3148 /* geniCodeReceive - generate intermediate code for "receive" */
3149 /*-----------------------------------------------------------------*/
3151 geniCodeReceive (value * args)
3153 /* for all arguments that are passed in registers */
3157 if (IS_REGPARM (args->etype))
3159 operand *opr = operandFromValue (args);
3161 symbol *sym = OP_SYMBOL (opr);
3164 /* we will use it after all optimizations
3165 and before liveRange calculation */
3166 if (!sym->addrtaken && !IS_VOLATILE (sym->etype))
3169 if ((IN_FARSPACE (SPEC_OCLS (sym->etype)) && !TARGET_IS_HC08) &&
3170 options.stackAuto == 0 &&
3171 (!(options.model == MODEL_FLAT24)) )
3176 opl = newiTempOperand (args->type, 0);
3178 sym->reqv->key = sym->key;
3179 OP_SYMBOL (sym->reqv)->key = sym->key;
3180 OP_SYMBOL (sym->reqv)->isreqv = 1;
3181 OP_SYMBOL (sym->reqv)->islocal = 0;
3182 SPIL_LOC (sym->reqv) = sym;
3186 ic = newiCode (RECEIVE, NULL, NULL);
3187 ic->argreg = SPEC_ARGREG(args->etype);
3189 currFunc->recvSize = getSize (sym->type);
3192 IC_RESULT (ic) = opr;
3200 /*-----------------------------------------------------------------*/
3201 /* geniCodeFunctionBody - create the function body */
3202 /*-----------------------------------------------------------------*/
3204 geniCodeFunctionBody (ast * tree,int lvl)
3211 /* reset the auto generation */
3217 func = ast2iCode (tree->left,lvl+1);
3218 fetype = getSpec (operandType (func));
3220 savelineno = lineno;
3221 lineno = OP_SYMBOL (func)->lineDef;
3222 /* create an entry label */
3223 geniCodeLabel (entryLabel);
3224 lineno = savelineno;
3226 /* create a proc icode */
3227 ic = newiCode (FUNCTION, func, NULL);
3228 lineno=ic->lineno = OP_SYMBOL (func)->lineDef;
3232 /* for all parameters that are passed
3233 on registers add a "receive" */
3234 geniCodeReceive (tree->values.args);
3236 /* generate code for the body */
3237 ast2iCode (tree->right,lvl+1);
3239 /* create a label for return */
3240 geniCodeLabel (returnLabel);
3242 /* now generate the end proc */
3243 ic = newiCode (ENDFUNCTION, func, NULL);
3248 /*-----------------------------------------------------------------*/
3249 /* geniCodeReturn - gen icode for 'return' statement */
3250 /*-----------------------------------------------------------------*/
3252 geniCodeReturn (operand * op)
3256 /* if the operand is present force an rvalue */
3258 op = geniCodeRValue (op, FALSE);
3260 ic = newiCode (RETURN, op, NULL);
3264 /*-----------------------------------------------------------------*/
3265 /* geniCodeIfx - generates code for extended if statement */
3266 /*-----------------------------------------------------------------*/
3268 geniCodeIfx (ast * tree,int lvl)
3271 operand *condition = ast2iCode (tree->left,lvl+1);
3274 /* if condition is null then exit */
3278 condition = geniCodeRValue (condition, FALSE);
3280 cetype = getSpec (operandType (condition));
3281 /* if the condition is a literal */
3282 if (IS_LITERAL (cetype))
3284 if (floatFromVal (condition->operand.valOperand))
3286 if (tree->trueLabel)
3287 geniCodeGoto (tree->trueLabel);
3293 if (tree->falseLabel)
3294 geniCodeGoto (tree->falseLabel);
3301 if (tree->trueLabel)
3303 ic = newiCodeCondition (condition,
3308 if (tree->falseLabel)
3309 geniCodeGoto (tree->falseLabel);
3313 ic = newiCodeCondition (condition,
3320 ast2iCode (tree->right,lvl+1);
3323 /*-----------------------------------------------------------------*/
3324 /* geniCodeJumpTable - tries to create a jump table for switch */
3325 /*-----------------------------------------------------------------*/
3327 geniCodeJumpTable (operand * cond, value * caseVals, ast * tree)
3329 int min = 0, max = 0, t, cnt = 0;
3335 int needRangeCheck = !optimize.noJTabBoundary
3336 || tree->values.switchVals.swDefault;
3338 if (!tree || !caseVals)
3341 /* the criteria for creating a jump table is */
3342 /* all integer numbers between the maximum & minimum must */
3343 /* be present , the maximum value should not exceed 255 */
3344 min = max = (int) floatFromVal (vch = caseVals);
3345 SNPRINTF (buffer, sizeof(buffer),
3347 tree->values.switchVals.swNum,
3349 addSet (&labels, newiTempLabel (buffer));
3351 /* if there is only one case value then no need */
3352 if (!(vch = vch->next))
3357 if (((t = (int) floatFromVal (vch)) - max) != 1)
3359 SNPRINTF (buffer, sizeof(buffer),
3361 tree->values.switchVals.swNum,
3363 addSet (&labels, newiTempLabel (buffer));
3369 /* if the number of case statements <= 2 then */
3370 /* it is not economical to create the jump table */
3371 /* since two compares are needed for boundary conditions */
3372 if ((needRangeCheck && cnt <= 2) || max > (255 / 3))
3375 if (tree->values.switchVals.swDefault)
3377 SNPRINTF (buffer, sizeof(buffer), "_default_%d", tree->values.switchVals.swNum);
3381 SNPRINTF (buffer, sizeof(buffer), "_swBrk_%d", tree->values.switchVals.swNum);
3385 falseLabel = newiTempLabel (buffer);
3387 /* so we can create a jumptable */
3388 /* first we rule out the boundary conditions */
3389 /* if only optimization says so */
3392 sym_link *cetype = getSpec (operandType (cond));
3393 /* no need to check the lower bound if
3394 the condition is unsigned & minimum value is zero */
3395 if (!(min == 0 && IS_UNSIGNED (cetype)))
3397 boundary = geniCodeLogic (cond, operandFromLit (min), '<');
3398 ic = newiCodeCondition (boundary, falseLabel, NULL);
3402 /* now for upper bounds */
3403 boundary = geniCodeLogic (cond, operandFromLit (max), '>');
3404 ic = newiCodeCondition (boundary, falseLabel, NULL);
3408 /* if the min is not zero then we no make it zero */
3411 cond = geniCodeSubtract (cond, operandFromLit (min));
3412 if (!IS_LITERAL(getSpec(operandType(cond))))
3413 setOperandType (cond, UCHARTYPE);
3416 /* now create the jumptable */
3417 ic = newiCode (JUMPTABLE, NULL, NULL);
3418 IC_JTCOND (ic) = cond;
3419 IC_JTLABELS (ic) = labels;
3424 /*-----------------------------------------------------------------*/
3425 /* geniCodeSwitch - changes a switch to a if statement */
3426 /*-----------------------------------------------------------------*/
3428 geniCodeSwitch (ast * tree,int lvl)
3431 operand *cond = geniCodeRValue (ast2iCode (tree->left,lvl+1), FALSE);
3432 value *caseVals = tree->values.switchVals.swVals;
3433 symbol *trueLabel, *falseLabel;
3435 /* If the condition is a literal, then just jump to the */
3436 /* appropriate case label. */
3437 if (IS_LITERAL(getSpec(operandType(cond))))
3439 int switchVal, caseVal;
3441 switchVal = (int) floatFromVal (cond->operand.valOperand);
3444 caseVal = (int) floatFromVal (caseVals);
3445 if (caseVal == switchVal)
3447 SNPRINTF (buffer, sizeof(buffer), "_case_%d_%d",
3448 tree->values.switchVals.swNum, caseVal);
3449 trueLabel = newiTempLabel (buffer);
3450 geniCodeGoto (trueLabel);
3453 caseVals = caseVals->next;
3455 goto defaultOrBreak;
3458 /* if we can make this a jump table */
3459 if (geniCodeJumpTable (cond, caseVals, tree))
3460 goto jumpTable; /* no need for the comparison */
3462 /* for the cases defined do */
3466 operand *compare = geniCodeLogic (cond,
3467 operandFromValue (caseVals),
3470 SNPRINTF (buffer, sizeof(buffer), "_case_%d_%d",
3471 tree->values.switchVals.swNum,
3472 (int) floatFromVal (caseVals));
3473 trueLabel = newiTempLabel (buffer);
3475 ic = newiCodeCondition (compare, trueLabel, NULL);
3477 caseVals = caseVals->next;
3482 /* if default is present then goto break else break */
3483 if (tree->values.switchVals.swDefault)
3485 SNPRINTF (buffer, sizeof(buffer), "_default_%d", tree->values.switchVals.swNum);
3489 SNPRINTF (buffer, sizeof(buffer), "_swBrk_%d", tree->values.switchVals.swNum);
3492 falseLabel = newiTempLabel (buffer);
3493 geniCodeGoto (falseLabel);
3496 ast2iCode (tree->right,lvl+1);
3499 /*-----------------------------------------------------------------*/
3500 /* geniCodeInline - intermediate code for inline assembler */
3501 /*-----------------------------------------------------------------*/
3503 geniCodeInline (ast * tree)
3507 ic = newiCode (INLINEASM, NULL, NULL);
3508 IC_INLINE (ic) = tree->values.inlineasm;
3512 /*-----------------------------------------------------------------*/
3513 /* geniCodeArrayInit - intermediate code for array initializer */
3514 /*-----------------------------------------------------------------*/
3516 geniCodeArrayInit (ast * tree, operand *array)
3520 if (!getenv("TRY_THE_NEW_INITIALIZER")) {
3521 ic = newiCode (ARRAYINIT, array, NULL);
3522 IC_ARRAYILIST (ic) = tree->values.constlist;
3524 operand *left=newOperand(), *right=newOperand();
3525 left->type=right->type=SYMBOL;
3526 OP_SYMBOL(left)=AST_SYMBOL(tree->left);
3527 OP_SYMBOL(right)=AST_SYMBOL(tree->right);
3528 ic = newiCode (ARRAYINIT, left, right);
3533 /*-----------------------------------------------------------------*/
3534 /* geniCodeCritical - intermediate code for a critical statement */
3535 /*-----------------------------------------------------------------*/
3537 geniCodeCritical (ast *tree, int lvl)
3542 /* If op is NULL, the original interrupt state will saved on */
3543 /* the stack. Otherwise, it will be saved in op. */
3545 /* Generate a save of the current interrupt state & disabled */
3546 ic = newiCode (CRITICAL, NULL, NULL);
3547 IC_RESULT (ic) = op;
3550 /* Generate the critical code sequence */
3551 if (tree->left && tree->left->type == EX_VALUE)
3552 geniCodeDummyRead (ast2iCode (tree->left,lvl+1));
3554 ast2iCode (tree->left,lvl+1);
3556 /* Generate a restore of the original interrupt state */
3557 ic = newiCode (ENDCRITICAL, NULL, op);
3561 /*-----------------------------------------------------------------*/
3562 /* Stuff used in ast2iCode to modify geniCodeDerefPtr in some */
3563 /* particular case. Ie : assigning or dereferencing array or ptr */
3564 /*-----------------------------------------------------------------*/
3565 set * lvaluereqSet = NULL;
3566 typedef struct lvalItem
3573 /*-----------------------------------------------------------------*/
3574 /* addLvaluereq - add a flag for lvalreq for current ast level */
3575 /*-----------------------------------------------------------------*/
3576 void addLvaluereq(int lvl)
3578 lvalItem * lpItem = (lvalItem *)Safe_alloc ( sizeof (lvalItem));
3581 addSetHead(&lvaluereqSet,lpItem);
3584 /*-----------------------------------------------------------------*/
3585 /* delLvaluereq - del a flag for lvalreq for current ast level */
3586 /*-----------------------------------------------------------------*/
3590 lpItem = getSet(&lvaluereqSet);
3591 if(lpItem) Safe_free(lpItem);
3593 /*-----------------------------------------------------------------*/
3594 /* clearLvaluereq - clear lvalreq flag */
3595 /*-----------------------------------------------------------------*/
3596 void clearLvaluereq()
3599 lpItem = peekSet(lvaluereqSet);
3600 if(lpItem) lpItem->req = 0;
3602 /*-----------------------------------------------------------------*/
3603 /* getLvaluereq - get the last lvalreq level */
3604 /*-----------------------------------------------------------------*/
3605 int getLvaluereqLvl()
3608 lpItem = peekSet(lvaluereqSet);
3609 if(lpItem) return lpItem->lvl;
3612 /*-----------------------------------------------------------------*/
3613 /* isLvaluereq - is lvalreq valid for this level ? */
3614 /*-----------------------------------------------------------------*/
3615 int isLvaluereq(int lvl)
3618 lpItem = peekSet(lvaluereqSet);
3619 if(lpItem) return ((lpItem->req)&&(lvl <= (lpItem->lvl+1)));
3623 /*-----------------------------------------------------------------*/
3624 /* ast2iCode - creates an icodeList from an ast */
3625 /*-----------------------------------------------------------------*/
3627 ast2iCode (ast * tree,int lvl)
3629 operand *left = NULL;
3630 operand *right = NULL;
3634 /* set the global variables for filename & line number */
3636 filename = tree->filename;
3638 lineno = tree->lineno;
3640 block = tree->block;
3642 scopeLevel = tree->level;
3644 seqPoint = tree->seqPoint;
3646 if (tree->type == EX_VALUE)
3647 return operandFromValue (tree->opval.val);
3649 if (tree->type == EX_LINK)
3650 return operandFromLink (tree->opval.lnk);
3652 /* if we find a nullop */
3653 if (tree->type == EX_OP &&
3654 (tree->opval.op == NULLOP ||
3655 tree->opval.op == BLOCK))
3657 if (tree->left && tree->left->type == EX_VALUE)
3658 geniCodeDummyRead (ast2iCode (tree->left,lvl+1));
3660 ast2iCode (tree->left,lvl+1);
3661 if (tree->right && tree->right->type == EX_VALUE)
3662 geniCodeDummyRead (ast2iCode (tree->right,lvl+1));
3664 ast2iCode (tree->right,lvl+1);
3668 /* special cases for not evaluating */
3669 if (tree->opval.op != ':' &&
3670 tree->opval.op != '?' &&
3671 tree->opval.op != CALL &&
3672 tree->opval.op != IFX &&
3673 tree->opval.op != LABEL &&
3674 tree->opval.op != GOTO &&
3675 tree->opval.op != SWITCH &&
3676 tree->opval.op != FUNCTION &&
3677 tree->opval.op != INLINEASM &&
3678 tree->opval.op != CRITICAL)
3681 if (IS_ASSIGN_OP (tree->opval.op) ||
3682 IS_DEREF_OP (tree) ||
3683 (tree->opval.op == '&' && !tree->right) ||
3684 tree->opval.op == PTR_OP)
3687 if ((IS_ARRAY_OP (tree->left) && IS_ARRAY_OP (tree->left->left)) ||
3688 (IS_DEREF_OP (tree) && IS_ARRAY_OP (tree->left)))
3691 left = operandFromAst (tree->left,lvl);
3693 if (IS_DEREF_OP (tree) && IS_DEREF_OP (tree->left))
3694 left = geniCodeRValue (left, TRUE);
3698 left = operandFromAst (tree->left,lvl);
3700 if (tree->opval.op == INC_OP ||
3701 tree->opval.op == DEC_OP)
3704 right = operandFromAst (tree->right,lvl);
3709 right = operandFromAst (tree->right,lvl);
3713 /* now depending on the type of operand */
3714 /* this will be a biggy */
3715 switch (tree->opval.op)
3718 case '[': /* array operation */
3720 //sym_link *ltype = operandType (left);
3721 //left = geniCodeRValue (left, IS_PTR (ltype->next) ? TRUE : FALSE);
3722 left = geniCodeRValue (left, FALSE);
3723 right = geniCodeRValue (right, TRUE);
3726 return geniCodeArray (left, right,lvl);
3728 case '.': /* structure dereference */
3729 if (IS_PTR (operandType (left)))
3730 left = geniCodeRValue (left, TRUE);
3732 left = geniCodeRValue (left, FALSE);
3734 return geniCodeStruct (left, right, tree->lvalue);
3736 case PTR_OP: /* structure pointer dereference */
3739 pType = operandType (left);
3740 left = geniCodeRValue (left, TRUE);
3742 setOClass (pType, getSpec (operandType (left)));
3745 return geniCodeStruct (left, right, tree->lvalue);
3747 case INC_OP: /* increment operator */
3749 return geniCodePostInc (left);
3751 return geniCodePreInc (right, tree->lvalue);
3753 case DEC_OP: /* decrement operator */
3755 return geniCodePostDec (left);
3757 return geniCodePreDec (right, tree->lvalue);
3759 case '&': /* bitwise and or address of operator */
3761 { /* this is a bitwise operator */
3762 left = geniCodeRValue (left, FALSE);
3763 right = geniCodeRValue (right, FALSE);
3764 return geniCodeBitwise (left, right, BITWISEAND, tree->ftype);
3767 return geniCodeAddressOf (left);
3769 case '|': /* bitwise or & xor */
3771 return geniCodeBitwise (geniCodeRValue (left, FALSE),
3772 geniCodeRValue (right, FALSE),
3777 return geniCodeDivision (geniCodeRValue (left, FALSE),
3778 geniCodeRValue (right, FALSE));
3781 return geniCodeModulus (geniCodeRValue (left, FALSE),
3782 geniCodeRValue (right, FALSE));
3785 return geniCodeMultiply (geniCodeRValue (left, FALSE),
3786 geniCodeRValue (right, FALSE),IS_INT(tree->ftype));
3788 return geniCodeDerefPtr (geniCodeRValue (left, FALSE),lvl);
3792 return geniCodeSubtract (geniCodeRValue (left, FALSE),
3793 geniCodeRValue (right, FALSE));
3795 return geniCodeUnaryMinus (geniCodeRValue (left, FALSE));
3799 return geniCodeAdd (geniCodeRValue (left, FALSE),
3800 geniCodeRValue (right, FALSE),lvl);
3802 return geniCodeRValue (left, FALSE); /* unary '+' has no meaning */
3805 return geniCodeLeftShift (geniCodeRValue (left, FALSE),
3806 geniCodeRValue (right, FALSE));
3809 return geniCodeRightShift (geniCodeRValue (left, FALSE),
3810 geniCodeRValue (right, FALSE));
3812 #if 0 // this indeed needs a second thought
3816 // let's keep this simple: get the rvalue we need
3817 op=geniCodeRValue (right, FALSE);
3818 // now cast it to whatever we want
3819 op=geniCodeCast (operandType(left), op, FALSE);
3820 // if this is going to be used as an lvalue, make it so
3826 #else // bug #604575, is it a bug ????
3827 return geniCodeCast (operandType (left),
3828 geniCodeRValue (right, FALSE), FALSE);
3835 return geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3840 operand *op = geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3841 setOperandType (op, UCHARTYPE);
3852 /* different compilers (even different gccs) evaluate
3853 the two calls in a different order. to get the same
3854 result on all machines we've to specify a clear sequence.
3855 return geniCodeLogic (geniCodeRValue (left, FALSE),
3856 geniCodeRValue (right, FALSE),
3860 operand *leftOp, *rightOp;
3862 rightOp = geniCodeRValue (right, FALSE);
3863 leftOp = geniCodeRValue (left , FALSE);
3865 return geniCodeLogic (leftOp, rightOp, tree->opval.op);
3868 return geniCodeConditional (tree,lvl);
3871 return operandFromLit (getSize (tree->right->ftype));
3875 sym_link *rtype = operandType (right);
3876 sym_link *ltype = operandType (left);
3877 if (IS_PTR (rtype) && IS_ITEMP (right)
3878 && right->isaddr && compareType (rtype->next, ltype) == 1)
3879 right = geniCodeRValue (right, TRUE);
3881 right = geniCodeRValue (right, FALSE);
3883 geniCodeAssign (left, right, 0);
3888 geniCodeAssign (left,
3889 geniCodeMultiply (geniCodeRValue (operandFromOperand (left),
3891 geniCodeRValue (right, FALSE),FALSE), 0);
3895 geniCodeAssign (left,
3896 geniCodeDivision (geniCodeRValue (operandFromOperand (left),
3898 geniCodeRValue (right, FALSE)), 0);
3901 geniCodeAssign (left,
3902 geniCodeModulus (geniCodeRValue (operandFromOperand (left),
3904 geniCodeRValue (right, FALSE)), 0);
3907 sym_link *rtype = operandType (right);
3908 sym_link *ltype = operandType (left);
3909 if (IS_PTR (rtype) && IS_ITEMP (right)
3910 && right->isaddr && compareType (rtype->next, ltype) == 1)
3911 right = geniCodeRValue (right, TRUE);
3913 right = geniCodeRValue (right, FALSE);
3916 return geniCodeAssign (left,
3917 geniCodeAdd (geniCodeRValue (operandFromOperand (left),
3923 sym_link *rtype = operandType (right);
3924 sym_link *ltype = operandType (left);
3925 if (IS_PTR (rtype) && IS_ITEMP (right)
3926 && right->isaddr && compareType (rtype->next, ltype) == 1)
3928 right = geniCodeRValue (right, TRUE);
3932 right = geniCodeRValue (right, FALSE);
3935 geniCodeAssign (left,
3936 geniCodeSubtract (geniCodeRValue (operandFromOperand (left),
3942 geniCodeAssign (left,
3943 geniCodeLeftShift (geniCodeRValue (operandFromOperand (left)
3945 geniCodeRValue (right, FALSE)), 0);
3948 geniCodeAssign (left,
3949 geniCodeRightShift (geniCodeRValue (operandFromOperand (left)
3951 geniCodeRValue (right, FALSE)), 0);
3954 geniCodeAssign (left,
3955 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3957 geniCodeRValue (right, FALSE),
3959 operandType (left)), 0);
3962 geniCodeAssign (left,
3963 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3965 geniCodeRValue (right, FALSE),
3967 operandType (left)), 0);
3970 geniCodeAssign (left,
3971 geniCodeBitwise (geniCodeRValue (operandFromOperand (left)
3973 geniCodeRValue (right, FALSE),
3975 operandType (left)), 0);
3977 return geniCodeRValue (right, FALSE);
3980 return geniCodeCall (ast2iCode (tree->left,lvl+1),
3983 geniCodeLabel (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3984 return ast2iCode (tree->right,lvl+1);
3987 geniCodeGoto (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3988 return ast2iCode (tree->right,lvl+1);
3991 geniCodeFunctionBody (tree,lvl);
3995 geniCodeReturn (right);
3999 geniCodeIfx (tree,lvl);
4003 geniCodeSwitch (tree,lvl);
4007 geniCodeInline (tree);
4011 geniCodeArrayInit(tree, ast2iCode (tree->left,lvl+1));
4015 geniCodeCritical (tree, lvl);
4021 /*-----------------------------------------------------------------*/
4022 /* reverseICChain - gets from the list and creates a linkedlist */
4023 /*-----------------------------------------------------------------*/
4030 while ((loop = getSet (&iCodeChain)))
4042 /*-----------------------------------------------------------------*/
4043 /* iCodeFromAst - given an ast will convert it to iCode */
4044 /*-----------------------------------------------------------------*/
4046 iCodeFromAst (ast * tree)
4048 returnLabel = newiTempLabel ("_return");
4049 entryLabel = newiTempLabel ("_entry");
4051 return reverseiCChain ();
4054 static const char *opTypeToStr(OPTYPE op)
4058 case SYMBOL: return "symbol";
4059 case VALUE: return "value";
4060 case TYPE: return "type";
4062 return "undefined type";
4066 operand *validateOpType(operand *op,
4073 if (op && op->type == type)
4078 "Internal error: validateOpType failed in %s(%s) @ %s:%u:"
4079 " expected %s, got %s\n",
4080 macro, args, file, line,
4081 opTypeToStr(type), op ? opTypeToStr(op->type) : "null op");
4083 return op; // never reached, makes compiler happy.