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)
2310 sym_link *ltype = operandType (left);
2315 if (IS_PTR (ltype->next) && left->isaddr)
2317 left = geniCodeRValue (left, FALSE);
2320 return geniCodeDerefPtr (geniCodeAdd (left, right, lvl), lvl);
2322 indexUnsigned = IS_UNSIGNED (getSpec (operandType (right)));
2323 right = geniCodeMultiply (right,
2324 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
2325 /* Even if right is a 'unsigned char', the result will be a 'signed int' due to the promotion rules.
2326 It doesn't make sense when accessing arrays, so let's fix it here: */
2328 SPEC_USIGN (getSpec (operandType (right))) = 1;
2329 /* we can check for limits here */
2330 if (isOperandLiteral (right) &&
2333 (operandLitValue (right) / getSize (ltype->next)) >= DCL_ELEM (ltype))
2335 werror (E_ARRAY_BOUND);
2336 right = operandFromLit (0);
2339 ic = newiCode ('+', left, right);
2341 IC_RESULT (ic) = newiTempOperand (((IS_PTR (ltype) &&
2342 !IS_AGGREGATE (ltype->next) &&
2343 !IS_PTR (ltype->next))
2344 ? ltype : ltype->next), 0);
2346 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (ltype->next));
2349 return IC_RESULT (ic);
2352 /*-----------------------------------------------------------------*/
2353 /* geniCodeStruct - generates intermediate code for structures */
2354 /*-----------------------------------------------------------------*/
2356 geniCodeStruct (operand * left, operand * right, bool islval)
2359 sym_link *type = operandType (left);
2360 sym_link *etype = getSpec (type);
2362 symbol *element = getStructElement (SPEC_STRUCT (etype),
2363 right->operand.symOperand);
2365 wassert(IS_SYMOP(right));
2367 /* add the offset */
2368 ic = newiCode ('+', left, operandFromLit (element->offset));
2370 IC_RESULT (ic) = newiTempOperand (element->type, 0);
2372 /* preserve the storage & output class of the struct */
2373 /* as well as the volatile attribute */
2374 retype = getSpec (operandType (IC_RESULT (ic)));
2375 SPEC_SCLS (retype) = SPEC_SCLS (etype);
2376 SPEC_OCLS (retype) = SPEC_OCLS (etype);
2377 SPEC_VOLATILE (retype) |= SPEC_VOLATILE (etype);
2378 SPEC_CONST (retype) |= SPEC_CONST (etype);
2380 if (IS_PTR (element->type))
2381 setOperandType (IC_RESULT (ic), aggrToPtr (operandType (IC_RESULT (ic)), TRUE));
2383 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (element->type));
2386 return (islval ? IC_RESULT (ic) : geniCodeRValue (IC_RESULT (ic), TRUE));
2389 /*-----------------------------------------------------------------*/
2390 /* geniCodePostInc - generate int code for Post increment */
2391 /*-----------------------------------------------------------------*/
2393 geniCodePostInc (operand * op)
2397 sym_link *optype = operandType (op);
2399 operand *rv = (IS_ITEMP (op) ?
2400 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2402 sym_link *rvtype = operandType (rv);
2405 /* if this is not an address we have trouble */
2408 werror (E_LVALUE_REQUIRED, "++");
2412 rOp = newiTempOperand (rvtype, 0);
2413 OP_SYMBOL(rOp)->noSpilLoc = 1;
2416 OP_SYMBOL(rv)->noSpilLoc = 1;
2418 geniCodeAssign (rOp, rv, 0);
2420 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2421 if (IS_FLOAT (rvtype))
2422 ic = newiCode ('+', rv, operandFromValue (constFloatVal ("1.0")));
2424 ic = newiCode ('+', rv, operandFromLit (size));
2426 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2429 geniCodeAssign (op, result, 0);
2435 /*-----------------------------------------------------------------*/
2436 /* geniCodePreInc - generate code for preIncrement */
2437 /*-----------------------------------------------------------------*/
2439 geniCodePreInc (operand * op, bool lvalue)
2442 sym_link *optype = operandType (op);
2443 operand *rop = (IS_ITEMP (op) ?
2444 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2446 sym_link *roptype = operandType (rop);
2452 werror (E_LVALUE_REQUIRED, "++");
2457 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2458 if (IS_FLOAT (roptype))
2459 ic = newiCode ('+', rop, operandFromValue (constFloatVal ("1.0")));
2461 ic = newiCode ('+', rop, operandFromLit (size));
2462 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2465 (void) geniCodeAssign (op, result, 0);
2466 if (lvalue || IS_TRUE_SYMOP (op))
2472 /*-----------------------------------------------------------------*/
2473 /* geniCodePostDec - generates code for Post decrement */
2474 /*-----------------------------------------------------------------*/
2476 geniCodePostDec (operand * op)
2480 sym_link *optype = operandType (op);
2482 operand *rv = (IS_ITEMP (op) ?
2483 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2485 sym_link *rvtype = operandType (rv);
2488 /* if this is not an address we have trouble */
2491 werror (E_LVALUE_REQUIRED, "--");
2495 rOp = newiTempOperand (rvtype, 0);
2496 OP_SYMBOL(rOp)->noSpilLoc = 1;
2499 OP_SYMBOL(rv)->noSpilLoc = 1;
2501 geniCodeAssign (rOp, rv, 0);
2503 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2504 if (IS_FLOAT (rvtype))
2505 ic = newiCode ('-', rv, operandFromValue (constFloatVal ("1.0")));
2507 ic = newiCode ('-', rv, operandFromLit (size));
2509 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2512 geniCodeAssign (op, result, 0);
2518 /*-----------------------------------------------------------------*/
2519 /* geniCodePreDec - generate code for pre decrement */
2520 /*-----------------------------------------------------------------*/
2522 geniCodePreDec (operand * op, bool lvalue)
2525 sym_link *optype = operandType (op);
2526 operand *rop = (IS_ITEMP (op) ?
2527 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2529 sym_link *roptype = operandType (rop);
2535 werror (E_LVALUE_REQUIRED, "--");
2540 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2541 if (IS_FLOAT (roptype))
2542 ic = newiCode ('-', rop, operandFromValue (constFloatVal ("1.0")));
2544 ic = newiCode ('-', rop, operandFromLit (size));
2545 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2548 (void) geniCodeAssign (op, result, 0);
2549 if (lvalue || IS_TRUE_SYMOP (op))
2556 /*-----------------------------------------------------------------*/
2557 /* geniCodeBitwise - gen int code for bitWise operators */
2558 /*-----------------------------------------------------------------*/
2560 geniCodeBitwise (operand * left, operand * right,
2561 int oper, sym_link * resType)
2565 left = geniCodeCast (resType, left, TRUE);
2566 right = geniCodeCast (resType, right, TRUE);
2568 ic = newiCode (oper, left, right);
2569 IC_RESULT (ic) = newiTempOperand (resType, 0);
2572 return IC_RESULT (ic);
2575 /*-----------------------------------------------------------------*/
2576 /* geniCodeAddressOf - gens icode for '&' address of operator */
2577 /*-----------------------------------------------------------------*/
2579 geniCodeAddressOf (operand * op)
2583 sym_link *optype = operandType (op);
2584 sym_link *opetype = getSpec (optype);
2586 if (IS_ITEMP (op) && op->isaddr && IS_PTR (optype))
2588 op = operandFromOperand (op);
2593 /* lvalue check already done in decorateType */
2594 /* this must be a lvalue */
2595 /* if (!op->isaddr && !IS_AGGREGATE(optype)) { */
2596 /* werror (E_LVALUE_REQUIRED,"&"); */
2600 p = newLink (DECLARATOR);
2602 /* set the pointer depending on the storage class */
2603 DCL_TYPE (p) = PTR_TYPE (SPEC_OCLS (opetype));
2605 p->next = copyLinkChain (optype);
2607 /* if already a temp */
2610 setOperandType (op, p);
2615 /* other wise make this of the type coming in */
2616 ic = newiCode (ADDRESS_OF, op, NULL);
2617 IC_RESULT (ic) = newiTempOperand (p, 1);
2618 IC_RESULT (ic)->isaddr = 0;
2620 return IC_RESULT (ic);
2622 /*-----------------------------------------------------------------*/
2623 /* setOClass - sets the output class depending on the pointer type */
2624 /*-----------------------------------------------------------------*/
2626 setOClass (sym_link * ptr, sym_link * spec)
2628 switch (DCL_TYPE (ptr))
2631 SPEC_OCLS (spec) = data;
2635 SPEC_OCLS (spec) = generic;
2639 SPEC_OCLS (spec) = xdata;
2643 SPEC_OCLS (spec) = code;
2647 SPEC_OCLS (spec) = idata;
2651 SPEC_OCLS (spec) = xstack;
2655 SPEC_OCLS (spec) = eeprom;
2664 /*-----------------------------------------------------------------*/
2665 /* geniCodeDerefPtr - dereference pointer with '*' */
2666 /*-----------------------------------------------------------------*/
2668 geniCodeDerefPtr (operand * op,int lvl)
2670 sym_link *rtype, *retype;
2671 sym_link *optype = operandType (op);
2673 // if this is an array then array access
2674 if (IS_ARRAY (optype)) {
2675 // don't worry, this will be optimized out later
2676 return geniCodeArray (op, operandFromLit (0), lvl);
2679 // just in case someone screws up
2680 wassert (IS_PTR (optype));
2682 if (IS_TRUE_SYMOP (op))
2685 op = geniCodeRValue (op, TRUE);
2688 /* now get rid of the pointer part */
2689 if (isLvaluereq(lvl) && IS_ITEMP (op))
2691 retype = getSpec (rtype = copyLinkChain (optype));
2695 retype = getSpec (rtype = copyLinkChain (optype->next));
2696 /* outputclass needs 2b updated */
2697 setOClass (optype, retype);
2700 op->isGptr = IS_GENPTR (optype);
2702 op->isaddr = (IS_PTR (rtype) ||
2703 IS_STRUCT (rtype) ||
2708 if (!isLvaluereq(lvl))
2709 op = geniCodeRValue (op, TRUE);
2711 setOperandType (op, rtype);
2716 /*-----------------------------------------------------------------*/
2717 /* geniCodeUnaryMinus - does a unary minus of the operand */
2718 /*-----------------------------------------------------------------*/
2720 geniCodeUnaryMinus (operand * op)
2723 sym_link *optype = operandType (op);
2725 if (IS_LITERAL (optype))
2726 return operandFromLit (-floatFromVal (op->operand.valOperand));
2728 ic = newiCode (UNARYMINUS, op, NULL);
2729 IC_RESULT (ic) = newiTempOperand (optype, 0);
2731 return IC_RESULT (ic);
2734 /*-----------------------------------------------------------------*/
2735 /* geniCodeLeftShift - gen i code for left shift */
2736 /*-----------------------------------------------------------------*/
2738 geniCodeLeftShift (operand * left, operand * right)
2742 left = usualUnaryConversions (left);
2743 ic = newiCode (LEFT_OP, left, right);
2744 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2746 return IC_RESULT (ic);
2749 /*-----------------------------------------------------------------*/
2750 /* geniCodeRightShift - gen i code for right shift */
2751 /*-----------------------------------------------------------------*/
2753 geniCodeRightShift (operand * left, operand * right)
2757 ic = newiCode (RIGHT_OP, left, right);
2758 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2760 return IC_RESULT (ic);
2763 /*-----------------------------------------------------------------*/
2764 /* geniCodeLogic- logic code */
2765 /*-----------------------------------------------------------------*/
2767 geniCodeLogic (operand * left, operand * right, int op)
2771 sym_link *rtype = operandType (right);
2772 sym_link *ltype = operandType (left);
2774 /* left is integral type and right is literal then
2775 check if the literal value is within bounds */
2776 if (IS_INTEGRAL (ltype) && IS_VALOP (right) && IS_LITERAL (rtype))
2778 checkConstantRange(ltype,
2779 OP_VALUE(right), "compare operation", 1);
2782 /* if one operand is a pointer and the other is a literal generic void pointer,
2783 change the type of the literal generic void pointer to match the other pointer */
2784 if (IS_GENPTR (ltype) && IS_VOID (ltype->next) && IS_ITEMP (left)
2785 && IS_PTR (rtype) && !IS_GENPTR(rtype))
2787 /* find left's definition */
2788 ic = (iCode *) setFirstItem (iCodeChain);
2791 if (((ic->op == CAST) || (ic->op == '='))
2792 && isOperandEqual(left, IC_RESULT (ic)))
2795 ic = setNextItem (iCodeChain);
2797 /* if casting literal to generic pointer, then cast to rtype instead */
2798 if (ic && (ic->op == CAST) && isOperandLiteral(IC_RIGHT (ic)))
2800 left = operandFromValue (valCastLiteral (rtype, operandLitValue (IC_RIGHT (ic))));
2801 ltype = operandType(left);
2804 if (IS_GENPTR (rtype) && IS_VOID (rtype->next) && IS_ITEMP (right)
2805 && IS_PTR (ltype) && !IS_GENPTR(ltype))
2807 /* find right's definition */
2808 ic = (iCode *) setFirstItem (iCodeChain);
2811 if (((ic->op == CAST) || (ic->op == '='))
2812 && isOperandEqual(right, IC_RESULT (ic)))
2815 ic = setNextItem (iCodeChain);
2817 /* if casting literal to generic pointer, then cast to rtype instead */
2818 if (ic && (ic->op == CAST) && isOperandLiteral(IC_RIGHT (ic)))
2820 right = operandFromValue (valCastLiteral (ltype, operandLitValue (IC_RIGHT (ic))));
2821 rtype = operandType(right);
2825 ctype = usualBinaryConversions (&left, &right, FALSE, FALSE);
2827 ic = newiCode (op, left, right);
2828 IC_RESULT (ic) = newiTempOperand (newCharLink (), 1);
2830 /* if comparing float
2831 and not a '==' || '!=' || '&&' || '||' (these
2833 if (IS_FLOAT(ctype) &&
2841 return IC_RESULT (ic);
2844 /*-----------------------------------------------------------------*/
2845 /* geniCodeUnary - for a a generic unary operation */
2846 /*-----------------------------------------------------------------*/
2848 geniCodeUnary (operand * op, int oper)
2850 iCode *ic = newiCode (oper, op, NULL);
2852 IC_RESULT (ic) = newiTempOperand (operandType (op), 0);
2854 return IC_RESULT (ic);
2857 /*-----------------------------------------------------------------*/
2858 /* geniCodeConditional - geniCode for '?' ':' operation */
2859 /*-----------------------------------------------------------------*/
2861 geniCodeConditional (ast * tree,int lvl)
2864 symbol *falseLabel = newiTempLabel (NULL);
2865 symbol *exitLabel = newiTempLabel (NULL);
2866 operand *cond = ast2iCode (tree->left,lvl+1);
2867 operand *true, *false, *result;
2869 ic = newiCodeCondition (geniCodeRValue (cond, FALSE),
2873 true = ast2iCode (tree->right->left,lvl+1);
2875 /* move the value to a new Operand */
2876 result = newiTempOperand (tree->right->ftype, 0);
2877 geniCodeAssign (result, geniCodeRValue (true, FALSE), 0);
2879 /* generate an unconditional goto */
2880 geniCodeGoto (exitLabel);
2882 /* now for the right side */
2883 geniCodeLabel (falseLabel);
2885 false = ast2iCode (tree->right->right,lvl+1);
2886 geniCodeAssign (result, geniCodeRValue (false, FALSE), 0);
2888 /* create the exit label */
2889 geniCodeLabel (exitLabel);
2894 /*-----------------------------------------------------------------*/
2895 /* geniCodeAssign - generate code for assignment */
2896 /*-----------------------------------------------------------------*/
2898 geniCodeAssign (operand * left, operand * right, int nosupdate)
2901 sym_link *ltype = operandType (left);
2902 sym_link *rtype = operandType (right);
2904 if (!left->isaddr && !IS_ITEMP (left))
2906 werror (E_LVALUE_REQUIRED, "assignment");
2910 /* left is integral type and right is literal then
2911 check if the literal value is within bounds */
2912 if (IS_INTEGRAL (ltype) && right->type == VALUE && IS_LITERAL (rtype))
2914 checkConstantRange(ltype,
2915 OP_VALUE(right), "= operation", 0);
2918 /* if the left & right type don't exactly match */
2919 /* if pointer set then make sure the check is
2920 done with the type & not the pointer */
2921 /* then cast rights type to left */
2923 /* first check the type for pointer assignement */
2924 if (left->isaddr && IS_PTR (ltype) && IS_ITEMP (left) &&
2925 compareType (ltype, rtype) <= 0)
2927 if (compareType (ltype->next, rtype) < 0)
2928 right = geniCodeCast (ltype->next, right, TRUE);
2930 else if (compareType (ltype, rtype) < 0)
2931 right = geniCodeCast (ltype, right, TRUE);
2933 /* If left is a true symbol & ! volatile
2934 create an assignment to temporary for
2935 the right & then assign this temporary
2936 to the symbol. This is SSA (static single
2937 assignment). Isn't it simple and folks have
2938 published mountains of paper on it */
2939 if (IS_TRUE_SYMOP (left) &&
2940 !isOperandVolatile (left, FALSE) &&
2941 isOperandGlobal (left))
2945 if (IS_TRUE_SYMOP (right))
2946 sym = OP_SYMBOL (right);
2947 ic = newiCode ('=', NULL, right);
2948 IC_RESULT (ic) = right = newiTempOperand (ltype, 0);
2949 SPIL_LOC (right) = sym;
2953 ic = newiCode ('=', NULL, right);
2954 IC_RESULT (ic) = left;
2957 /* if left isgptr flag is set then support
2958 routine will be required */
2962 ic->nosupdate = nosupdate;
2966 /*-----------------------------------------------------------------*/
2967 /* geniCodeDummyRead - generate code for dummy read */
2968 /*-----------------------------------------------------------------*/
2970 geniCodeDummyRead (operand * op)
2973 sym_link *type = operandType (op);
2975 if (!IS_VOLATILE(type))
2978 ic = newiCode (DUMMY_READ_VOLATILE, NULL, op);
2984 /*-----------------------------------------------------------------*/
2985 /* geniCodeSEParms - generate code for side effecting fcalls */
2986 /*-----------------------------------------------------------------*/
2988 geniCodeSEParms (ast * parms,int lvl)
2993 if (parms->type == EX_OP && parms->opval.op == PARAM)
2995 geniCodeSEParms (parms->left,lvl);
2996 geniCodeSEParms (parms->right,lvl);
3000 /* hack don't like this but too lazy to think of
3002 if (IS_ADDRESS_OF_OP (parms))
3003 parms->left->lvalue = 1;
3005 if (IS_CAST_OP (parms) &&
3006 IS_PTR (parms->ftype) &&
3007 IS_ADDRESS_OF_OP (parms->right))
3008 parms->right->left->lvalue = 1;
3010 parms->opval.oprnd =
3011 geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
3013 parms->type = EX_OPERAND;
3014 AST_ARGREG(parms) = parms->etype ? SPEC_ARGREG(parms->etype) :
3015 SPEC_ARGREG(parms->ftype);
3018 /*-----------------------------------------------------------------*/
3019 /* geniCodeParms - generates parameters */
3020 /*-----------------------------------------------------------------*/
3022 geniCodeParms (ast * parms, value *argVals, int *stack,
3023 sym_link * fetype, symbol * func,int lvl)
3031 if (argVals==NULL) {
3033 argVals=FUNC_ARGS(func->type);
3036 /* if this is a param node then do the left & right */
3037 if (parms->type == EX_OP && parms->opval.op == PARAM)
3039 argVals=geniCodeParms (parms->left, argVals, stack, fetype, func,lvl);
3040 argVals=geniCodeParms (parms->right, argVals, stack, fetype, func,lvl);
3044 /* get the parameter value */
3045 if (parms->type == EX_OPERAND)
3046 pval = parms->opval.oprnd;
3049 /* maybe this else should go away ?? */
3050 /* hack don't like this but too lazy to think of
3052 if (IS_ADDRESS_OF_OP (parms))
3053 parms->left->lvalue = 1;
3055 if (IS_CAST_OP (parms) &&
3056 IS_PTR (parms->ftype) &&
3057 IS_ADDRESS_OF_OP (parms->right))
3058 parms->right->left->lvalue = 1;
3060 pval = geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
3063 /* if register parm then make it a send */
3064 if ((IS_REGPARM (parms->etype) && !IFFUNC_HASVARARGS(func->type)) ||
3065 IFFUNC_ISBUILTIN(func->type))
3067 ic = newiCode (SEND, pval, NULL);
3068 ic->argreg = SPEC_ARGREG(parms->etype);
3069 ic->builtinSEND = FUNC_ISBUILTIN(func->type);
3074 /* now decide whether to push or assign */
3075 if (!(options.stackAuto || IFFUNC_ISREENT (func->type)))
3079 operand *top = operandFromSymbol (argVals->sym);
3080 /* clear useDef and other bitVectors */
3081 OP_USES(top)=OP_DEFS(top)=OP_SYMBOL(top)->clashes = NULL;
3082 geniCodeAssign (top, pval, 1);
3086 sym_link *p = operandType (pval);
3088 ic = newiCode (IPUSH, pval, NULL);
3090 /* update the stack adjustment */
3091 *stack += getSize (IS_AGGREGATE (p) ? aggrToPtr (p, FALSE) : p);
3096 argVals=argVals->next;
3100 /*-----------------------------------------------------------------*/
3101 /* geniCodeCall - generates temp code for calling */
3102 /*-----------------------------------------------------------------*/
3104 geniCodeCall (operand * left, ast * parms,int lvl)
3108 sym_link *type, *etype;
3111 if (!IS_FUNC(OP_SYMBOL(left)->type) &&
3112 !IS_CODEPTR(OP_SYMBOL(left)->type)) {
3113 werror (E_FUNCTION_EXPECTED);
3114 return operandFromValue(valueFromLit(0));
3117 /* take care of parameters with side-effecting
3118 function calls in them, this is required to take care
3119 of overlaying function parameters */
3120 geniCodeSEParms (parms,lvl);
3122 /* first the parameters */
3123 geniCodeParms (parms, NULL, &stack, getSpec (operandType (left)), OP_SYMBOL (left),lvl);
3125 /* now call : if symbol then pcall */
3126 if (IS_OP_POINTER (left) || IS_ITEMP(left)) {
3127 ic = newiCode (PCALL, left, NULL);
3129 ic = newiCode (CALL, left, NULL);
3132 type = copyLinkChain (operandType (left)->next);
3133 etype = getSpec (type);
3134 SPEC_EXTR (etype) = 0;
3135 IC_RESULT (ic) = result = newiTempOperand (type, 1);
3139 /* stack adjustment after call */
3140 ic->parmBytes = stack;
3145 /*-----------------------------------------------------------------*/
3146 /* geniCodeReceive - generate intermediate code for "receive" */
3147 /*-----------------------------------------------------------------*/
3149 geniCodeReceive (value * args)
3151 /* for all arguments that are passed in registers */
3155 if (IS_REGPARM (args->etype))
3157 operand *opr = operandFromValue (args);
3159 symbol *sym = OP_SYMBOL (opr);
3162 /* we will use it after all optimizations
3163 and before liveRange calculation */
3164 if (!sym->addrtaken && !IS_VOLATILE (sym->etype))
3167 if ((IN_FARSPACE (SPEC_OCLS (sym->etype)) && !TARGET_IS_HC08) &&
3168 options.stackAuto == 0 &&
3169 (!(options.model == MODEL_FLAT24)) )
3174 opl = newiTempOperand (args->type, 0);
3176 sym->reqv->key = sym->key;
3177 OP_SYMBOL (sym->reqv)->key = sym->key;
3178 OP_SYMBOL (sym->reqv)->isreqv = 1;
3179 OP_SYMBOL (sym->reqv)->islocal = 0;
3180 SPIL_LOC (sym->reqv) = sym;
3184 ic = newiCode (RECEIVE, NULL, NULL);
3185 ic->argreg = SPEC_ARGREG(args->etype);
3187 currFunc->recvSize = getSize (sym->type);
3190 IC_RESULT (ic) = opr;
3198 /*-----------------------------------------------------------------*/
3199 /* geniCodeFunctionBody - create the function body */
3200 /*-----------------------------------------------------------------*/
3202 geniCodeFunctionBody (ast * tree,int lvl)
3209 /* reset the auto generation */
3215 func = ast2iCode (tree->left,lvl+1);
3216 fetype = getSpec (operandType (func));
3218 savelineno = lineno;
3219 lineno = OP_SYMBOL (func)->lineDef;
3220 /* create an entry label */
3221 geniCodeLabel (entryLabel);
3222 lineno = savelineno;
3224 /* create a proc icode */
3225 ic = newiCode (FUNCTION, func, NULL);
3226 lineno=ic->lineno = OP_SYMBOL (func)->lineDef;
3230 /* for all parameters that are passed
3231 on registers add a "receive" */
3232 geniCodeReceive (tree->values.args);
3234 /* generate code for the body */
3235 ast2iCode (tree->right,lvl+1);
3237 /* create a label for return */
3238 geniCodeLabel (returnLabel);
3240 /* now generate the end proc */
3241 ic = newiCode (ENDFUNCTION, func, NULL);
3246 /*-----------------------------------------------------------------*/
3247 /* geniCodeReturn - gen icode for 'return' statement */
3248 /*-----------------------------------------------------------------*/
3250 geniCodeReturn (operand * op)
3254 /* if the operand is present force an rvalue */
3256 op = geniCodeRValue (op, FALSE);
3258 ic = newiCode (RETURN, op, NULL);
3262 /*-----------------------------------------------------------------*/
3263 /* geniCodeIfx - generates code for extended if statement */
3264 /*-----------------------------------------------------------------*/
3266 geniCodeIfx (ast * tree,int lvl)
3269 operand *condition = ast2iCode (tree->left,lvl+1);
3272 /* if condition is null then exit */
3276 condition = geniCodeRValue (condition, FALSE);
3278 cetype = getSpec (operandType (condition));
3279 /* if the condition is a literal */
3280 if (IS_LITERAL (cetype))
3282 if (floatFromVal (condition->operand.valOperand))
3284 if (tree->trueLabel)
3285 geniCodeGoto (tree->trueLabel);
3291 if (tree->falseLabel)
3292 geniCodeGoto (tree->falseLabel);
3299 if (tree->trueLabel)
3301 ic = newiCodeCondition (condition,
3306 if (tree->falseLabel)
3307 geniCodeGoto (tree->falseLabel);
3311 ic = newiCodeCondition (condition,
3318 ast2iCode (tree->right,lvl+1);
3321 /*-----------------------------------------------------------------*/
3322 /* geniCodeJumpTable - tries to create a jump table for switch */
3323 /*-----------------------------------------------------------------*/
3325 geniCodeJumpTable (operand * cond, value * caseVals, ast * tree)
3327 int min = 0, max = 0, t, cnt = 0;
3333 int needRangeCheck = !optimize.noJTabBoundary
3334 || tree->values.switchVals.swDefault;
3336 if (!tree || !caseVals)
3339 /* the criteria for creating a jump table is */
3340 /* all integer numbers between the maximum & minimum must */
3341 /* be present , the maximum value should not exceed 255 */
3342 min = max = (int) floatFromVal (vch = caseVals);
3343 SNPRINTF (buffer, sizeof(buffer),
3345 tree->values.switchVals.swNum,
3347 addSet (&labels, newiTempLabel (buffer));
3349 /* if there is only one case value then no need */
3350 if (!(vch = vch->next))
3355 if (((t = (int) floatFromVal (vch)) - max) != 1)
3357 SNPRINTF (buffer, sizeof(buffer),
3359 tree->values.switchVals.swNum,
3361 addSet (&labels, newiTempLabel (buffer));
3367 /* if the number of case statements <= 2 then */
3368 /* it is not economical to create the jump table */
3369 /* since two compares are needed for boundary conditions */
3370 if ((needRangeCheck && cnt <= 2) || max > (255 / 3))
3373 if (tree->values.switchVals.swDefault)
3375 SNPRINTF (buffer, sizeof(buffer), "_default_%d", tree->values.switchVals.swNum);
3379 SNPRINTF (buffer, sizeof(buffer), "_swBrk_%d", tree->values.switchVals.swNum);
3383 falseLabel = newiTempLabel (buffer);
3385 /* so we can create a jumptable */
3386 /* first we rule out the boundary conditions */
3387 /* if only optimization says so */
3390 sym_link *cetype = getSpec (operandType (cond));
3391 /* no need to check the lower bound if
3392 the condition is unsigned & minimum value is zero */
3393 if (!(min == 0 && IS_UNSIGNED (cetype)))
3395 boundary = geniCodeLogic (cond, operandFromLit (min), '<');
3396 ic = newiCodeCondition (boundary, falseLabel, NULL);
3400 /* now for upper bounds */
3401 boundary = geniCodeLogic (cond, operandFromLit (max), '>');
3402 ic = newiCodeCondition (boundary, falseLabel, NULL);
3406 /* if the min is not zero then we no make it zero */
3409 cond = geniCodeSubtract (cond, operandFromLit (min));
3410 if (!IS_LITERAL(getSpec(operandType(cond))))
3411 setOperandType (cond, UCHARTYPE);
3414 /* now create the jumptable */
3415 ic = newiCode (JUMPTABLE, NULL, NULL);
3416 IC_JTCOND (ic) = cond;
3417 IC_JTLABELS (ic) = labels;
3422 /*-----------------------------------------------------------------*/
3423 /* geniCodeSwitch - changes a switch to a if statement */
3424 /*-----------------------------------------------------------------*/
3426 geniCodeSwitch (ast * tree,int lvl)
3429 operand *cond = geniCodeRValue (ast2iCode (tree->left,lvl+1), FALSE);
3430 value *caseVals = tree->values.switchVals.swVals;
3431 symbol *trueLabel, *falseLabel;
3433 /* If the condition is a literal, then just jump to the */
3434 /* appropriate case label. */
3435 if (IS_LITERAL(getSpec(operandType(cond))))
3437 int switchVal, caseVal;
3439 switchVal = (int) floatFromVal (cond->operand.valOperand);
3442 caseVal = (int) floatFromVal (caseVals);
3443 if (caseVal == switchVal)
3445 SNPRINTF (buffer, sizeof(buffer), "_case_%d_%d",
3446 tree->values.switchVals.swNum, caseVal);
3447 trueLabel = newiTempLabel (buffer);
3448 geniCodeGoto (trueLabel);
3451 caseVals = caseVals->next;
3453 goto defaultOrBreak;
3456 /* if we can make this a jump table */
3457 if (geniCodeJumpTable (cond, caseVals, tree))
3458 goto jumpTable; /* no need for the comparison */
3460 /* for the cases defined do */
3464 operand *compare = geniCodeLogic (cond,
3465 operandFromValue (caseVals),
3468 SNPRINTF (buffer, sizeof(buffer), "_case_%d_%d",
3469 tree->values.switchVals.swNum,
3470 (int) floatFromVal (caseVals));
3471 trueLabel = newiTempLabel (buffer);
3473 ic = newiCodeCondition (compare, trueLabel, NULL);
3475 caseVals = caseVals->next;
3480 /* if default is present then goto break else break */
3481 if (tree->values.switchVals.swDefault)
3483 SNPRINTF (buffer, sizeof(buffer), "_default_%d", tree->values.switchVals.swNum);
3487 SNPRINTF (buffer, sizeof(buffer), "_swBrk_%d", tree->values.switchVals.swNum);
3490 falseLabel = newiTempLabel (buffer);
3491 geniCodeGoto (falseLabel);
3494 ast2iCode (tree->right,lvl+1);
3497 /*-----------------------------------------------------------------*/
3498 /* geniCodeInline - intermediate code for inline assembler */
3499 /*-----------------------------------------------------------------*/
3501 geniCodeInline (ast * tree)
3505 ic = newiCode (INLINEASM, NULL, NULL);
3506 IC_INLINE (ic) = tree->values.inlineasm;
3510 /*-----------------------------------------------------------------*/
3511 /* geniCodeArrayInit - intermediate code for array initializer */
3512 /*-----------------------------------------------------------------*/
3514 geniCodeArrayInit (ast * tree, operand *array)
3518 if (!getenv("TRY_THE_NEW_INITIALIZER")) {
3519 ic = newiCode (ARRAYINIT, array, NULL);
3520 IC_ARRAYILIST (ic) = tree->values.constlist;
3522 operand *left=newOperand(), *right=newOperand();
3523 left->type=right->type=SYMBOL;
3524 OP_SYMBOL(left)=AST_SYMBOL(tree->left);
3525 OP_SYMBOL(right)=AST_SYMBOL(tree->right);
3526 ic = newiCode (ARRAYINIT, left, right);
3531 /*-----------------------------------------------------------------*/
3532 /* geniCodeCritical - intermediate code for a critical statement */
3533 /*-----------------------------------------------------------------*/
3535 geniCodeCritical (ast *tree, int lvl)
3540 /* If op is NULL, the original interrupt state will saved on */
3541 /* the stack. Otherwise, it will be saved in op. */
3543 /* Generate a save of the current interrupt state & disabled */
3544 ic = newiCode (CRITICAL, NULL, NULL);
3545 IC_RESULT (ic) = op;
3548 /* Generate the critical code sequence */
3549 if (tree->left && tree->left->type == EX_VALUE)
3550 geniCodeDummyRead (ast2iCode (tree->left,lvl+1));
3552 ast2iCode (tree->left,lvl+1);
3554 /* Generate a restore of the original interrupt state */
3555 ic = newiCode (ENDCRITICAL, NULL, op);
3559 /*-----------------------------------------------------------------*/
3560 /* Stuff used in ast2iCode to modify geniCodeDerefPtr in some */
3561 /* particular case. Ie : assigning or dereferencing array or ptr */
3562 /*-----------------------------------------------------------------*/
3563 set * lvaluereqSet = NULL;
3564 typedef struct lvalItem
3571 /*-----------------------------------------------------------------*/
3572 /* addLvaluereq - add a flag for lvalreq for current ast level */
3573 /*-----------------------------------------------------------------*/
3574 void addLvaluereq(int lvl)
3576 lvalItem * lpItem = (lvalItem *)Safe_alloc ( sizeof (lvalItem));
3579 addSetHead(&lvaluereqSet,lpItem);
3582 /*-----------------------------------------------------------------*/
3583 /* delLvaluereq - del a flag for lvalreq for current ast level */
3584 /*-----------------------------------------------------------------*/
3588 lpItem = getSet(&lvaluereqSet);
3589 if(lpItem) Safe_free(lpItem);
3591 /*-----------------------------------------------------------------*/
3592 /* clearLvaluereq - clear lvalreq flag */
3593 /*-----------------------------------------------------------------*/
3594 void clearLvaluereq()
3597 lpItem = peekSet(lvaluereqSet);
3598 if(lpItem) lpItem->req = 0;
3600 /*-----------------------------------------------------------------*/
3601 /* getLvaluereq - get the last lvalreq level */
3602 /*-----------------------------------------------------------------*/
3603 int getLvaluereqLvl()
3606 lpItem = peekSet(lvaluereqSet);
3607 if(lpItem) return lpItem->lvl;
3610 /*-----------------------------------------------------------------*/
3611 /* isLvaluereq - is lvalreq valid for this level ? */
3612 /*-----------------------------------------------------------------*/
3613 int isLvaluereq(int lvl)
3616 lpItem = peekSet(lvaluereqSet);
3617 if(lpItem) return ((lpItem->req)&&(lvl <= (lpItem->lvl+1)));
3621 /*-----------------------------------------------------------------*/
3622 /* ast2iCode - creates an icodeList from an ast */
3623 /*-----------------------------------------------------------------*/
3625 ast2iCode (ast * tree,int lvl)
3627 operand *left = NULL;
3628 operand *right = NULL;
3632 /* set the global variables for filename & line number */
3634 filename = tree->filename;
3636 lineno = tree->lineno;
3638 block = tree->block;
3640 scopeLevel = tree->level;
3642 seqPoint = tree->seqPoint;
3644 if (tree->type == EX_VALUE)
3645 return operandFromValue (tree->opval.val);
3647 if (tree->type == EX_LINK)
3648 return operandFromLink (tree->opval.lnk);
3650 /* if we find a nullop */
3651 if (tree->type == EX_OP &&
3652 (tree->opval.op == NULLOP ||
3653 tree->opval.op == BLOCK))
3655 if (tree->left && tree->left->type == EX_VALUE)
3656 geniCodeDummyRead (ast2iCode (tree->left,lvl+1));
3658 ast2iCode (tree->left,lvl+1);
3659 if (tree->right && tree->right->type == EX_VALUE)
3660 geniCodeDummyRead (ast2iCode (tree->right,lvl+1));
3662 ast2iCode (tree->right,lvl+1);
3666 /* special cases for not evaluating */
3667 if (tree->opval.op != ':' &&
3668 tree->opval.op != '?' &&
3669 tree->opval.op != CALL &&
3670 tree->opval.op != IFX &&
3671 tree->opval.op != LABEL &&
3672 tree->opval.op != GOTO &&
3673 tree->opval.op != SWITCH &&
3674 tree->opval.op != FUNCTION &&
3675 tree->opval.op != INLINEASM &&
3676 tree->opval.op != CRITICAL)
3679 if (IS_ASSIGN_OP (tree->opval.op) ||
3680 IS_DEREF_OP (tree) ||
3681 (tree->opval.op == '&' && !tree->right) ||
3682 tree->opval.op == PTR_OP)
3685 if ((IS_ARRAY_OP (tree->left) && IS_ARRAY_OP (tree->left->left)) ||
3686 (IS_DEREF_OP (tree) && IS_ARRAY_OP (tree->left)))
3689 left = operandFromAst (tree->left,lvl);
3691 if (IS_DEREF_OP (tree) && IS_DEREF_OP (tree->left))
3692 left = geniCodeRValue (left, TRUE);
3696 left = operandFromAst (tree->left,lvl);
3698 if (tree->opval.op == INC_OP ||
3699 tree->opval.op == DEC_OP)
3702 right = operandFromAst (tree->right,lvl);
3707 right = operandFromAst (tree->right,lvl);
3711 /* now depending on the type of operand */
3712 /* this will be a biggy */
3713 switch (tree->opval.op)
3716 case '[': /* array operation */
3718 //sym_link *ltype = operandType (left);
3719 //left = geniCodeRValue (left, IS_PTR (ltype->next) ? TRUE : FALSE);
3720 left = geniCodeRValue (left, FALSE);
3721 right = geniCodeRValue (right, TRUE);
3724 return geniCodeArray (left, right,lvl);
3726 case '.': /* structure dereference */
3727 if (IS_PTR (operandType (left)))
3728 left = geniCodeRValue (left, TRUE);
3730 left = geniCodeRValue (left, FALSE);
3732 return geniCodeStruct (left, right, tree->lvalue);
3734 case PTR_OP: /* structure pointer dereference */
3737 pType = operandType (left);
3738 left = geniCodeRValue (left, TRUE);
3740 setOClass (pType, getSpec (operandType (left)));
3743 return geniCodeStruct (left, right, tree->lvalue);
3745 case INC_OP: /* increment operator */
3747 return geniCodePostInc (left);
3749 return geniCodePreInc (right, tree->lvalue);
3751 case DEC_OP: /* decrement operator */
3753 return geniCodePostDec (left);
3755 return geniCodePreDec (right, tree->lvalue);
3757 case '&': /* bitwise and or address of operator */
3759 { /* this is a bitwise operator */
3760 left = geniCodeRValue (left, FALSE);
3761 right = geniCodeRValue (right, FALSE);
3762 return geniCodeBitwise (left, right, BITWISEAND, tree->ftype);
3765 return geniCodeAddressOf (left);
3767 case '|': /* bitwise or & xor */
3769 return geniCodeBitwise (geniCodeRValue (left, FALSE),
3770 geniCodeRValue (right, FALSE),
3775 return geniCodeDivision (geniCodeRValue (left, FALSE),
3776 geniCodeRValue (right, FALSE));
3779 return geniCodeModulus (geniCodeRValue (left, FALSE),
3780 geniCodeRValue (right, FALSE));
3783 return geniCodeMultiply (geniCodeRValue (left, FALSE),
3784 geniCodeRValue (right, FALSE),IS_INT(tree->ftype));
3786 return geniCodeDerefPtr (geniCodeRValue (left, FALSE),lvl);
3790 return geniCodeSubtract (geniCodeRValue (left, FALSE),
3791 geniCodeRValue (right, FALSE));
3793 return geniCodeUnaryMinus (geniCodeRValue (left, FALSE));
3797 return geniCodeAdd (geniCodeRValue (left, FALSE),
3798 geniCodeRValue (right, FALSE),lvl);
3800 return geniCodeRValue (left, FALSE); /* unary '+' has no meaning */
3803 return geniCodeLeftShift (geniCodeRValue (left, FALSE),
3804 geniCodeRValue (right, FALSE));
3807 return geniCodeRightShift (geniCodeRValue (left, FALSE),
3808 geniCodeRValue (right, FALSE));
3810 #if 0 // this indeed needs a second thought
3814 // let's keep this simple: get the rvalue we need
3815 op=geniCodeRValue (right, FALSE);
3816 // now cast it to whatever we want
3817 op=geniCodeCast (operandType(left), op, FALSE);
3818 // if this is going to be used as an lvalue, make it so
3824 #else // bug #604575, is it a bug ????
3825 return geniCodeCast (operandType (left),
3826 geniCodeRValue (right, FALSE), FALSE);
3833 return geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3838 operand *op = geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3839 setOperandType (op, UCHARTYPE);
3850 /* different compilers (even different gccs) evaluate
3851 the two calls in a different order. to get the same
3852 result on all machines we've to specify a clear sequence.
3853 return geniCodeLogic (geniCodeRValue (left, FALSE),
3854 geniCodeRValue (right, FALSE),
3858 operand *leftOp, *rightOp;
3860 rightOp = geniCodeRValue (right, FALSE);
3861 leftOp = geniCodeRValue (left , FALSE);
3863 return geniCodeLogic (leftOp, rightOp, tree->opval.op);
3866 return geniCodeConditional (tree,lvl);
3869 return operandFromLit (getSize (tree->right->ftype));
3873 sym_link *rtype = operandType (right);
3874 sym_link *ltype = operandType (left);
3875 if (IS_PTR (rtype) && IS_ITEMP (right)
3876 && right->isaddr && compareType (rtype->next, ltype) == 1)
3877 right = geniCodeRValue (right, TRUE);
3879 right = geniCodeRValue (right, FALSE);
3881 geniCodeAssign (left, right, 0);
3886 geniCodeAssign (left,
3887 geniCodeMultiply (geniCodeRValue (operandFromOperand (left),
3889 geniCodeRValue (right, FALSE),FALSE), 0);
3893 geniCodeAssign (left,
3894 geniCodeDivision (geniCodeRValue (operandFromOperand (left),
3896 geniCodeRValue (right, FALSE)), 0);
3899 geniCodeAssign (left,
3900 geniCodeModulus (geniCodeRValue (operandFromOperand (left),
3902 geniCodeRValue (right, FALSE)), 0);
3905 sym_link *rtype = operandType (right);
3906 sym_link *ltype = operandType (left);
3907 if (IS_PTR (rtype) && IS_ITEMP (right)
3908 && right->isaddr && compareType (rtype->next, ltype) == 1)
3909 right = geniCodeRValue (right, TRUE);
3911 right = geniCodeRValue (right, FALSE);
3914 return geniCodeAssign (left,
3915 geniCodeAdd (geniCodeRValue (operandFromOperand (left),
3921 sym_link *rtype = operandType (right);
3922 sym_link *ltype = operandType (left);
3923 if (IS_PTR (rtype) && IS_ITEMP (right)
3924 && right->isaddr && compareType (rtype->next, ltype) == 1)
3926 right = geniCodeRValue (right, TRUE);
3930 right = geniCodeRValue (right, FALSE);
3933 geniCodeAssign (left,
3934 geniCodeSubtract (geniCodeRValue (operandFromOperand (left),
3940 geniCodeAssign (left,
3941 geniCodeLeftShift (geniCodeRValue (operandFromOperand (left)
3943 geniCodeRValue (right, FALSE)), 0);
3946 geniCodeAssign (left,
3947 geniCodeRightShift (geniCodeRValue (operandFromOperand (left)
3949 geniCodeRValue (right, FALSE)), 0);
3952 geniCodeAssign (left,
3953 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3955 geniCodeRValue (right, FALSE),
3957 operandType (left)), 0);
3960 geniCodeAssign (left,
3961 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3963 geniCodeRValue (right, FALSE),
3965 operandType (left)), 0);
3968 geniCodeAssign (left,
3969 geniCodeBitwise (geniCodeRValue (operandFromOperand (left)
3971 geniCodeRValue (right, FALSE),
3973 operandType (left)), 0);
3975 return geniCodeRValue (right, FALSE);
3978 return geniCodeCall (ast2iCode (tree->left,lvl+1),
3981 geniCodeLabel (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3982 return ast2iCode (tree->right,lvl+1);
3985 geniCodeGoto (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3986 return ast2iCode (tree->right,lvl+1);
3989 geniCodeFunctionBody (tree,lvl);
3993 geniCodeReturn (right);
3997 geniCodeIfx (tree,lvl);
4001 geniCodeSwitch (tree,lvl);
4005 geniCodeInline (tree);
4009 geniCodeArrayInit(tree, ast2iCode (tree->left,lvl+1));
4013 geniCodeCritical (tree, lvl);
4019 /*-----------------------------------------------------------------*/
4020 /* reverseICChain - gets from the list and creates a linkedlist */
4021 /*-----------------------------------------------------------------*/
4028 while ((loop = getSet (&iCodeChain)))
4040 /*-----------------------------------------------------------------*/
4041 /* iCodeFromAst - given an ast will convert it to iCode */
4042 /*-----------------------------------------------------------------*/
4044 iCodeFromAst (ast * tree)
4046 returnLabel = newiTempLabel ("_return");
4047 entryLabel = newiTempLabel ("_entry");
4049 return reverseiCChain ();
4052 static const char *opTypeToStr(OPTYPE op)
4056 case SYMBOL: return "symbol";
4057 case VALUE: return "value";
4058 case TYPE: return "type";
4060 return "undefined type";
4064 operand *validateOpType(operand *op,
4071 if (op && op->type == type)
4076 "Internal error: validateOpType failed in %s(%s) @ %s:%u:"
4077 " expected %s, got %s\n",
4078 macro, args, file, line,
4079 opTypeToStr(type), op ? opTypeToStr(op->type) : "null op");
4081 return op; // never reached, makes compiler happy.