1 /*-------------------------------------------------------------------------
3 SDCCicode.c - intermediate code generation etc.
4 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1998)
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 In other words, you are welcome to use, share and improve this program.
21 You are forbidden to forbid anyone else to use, share and improve
22 what you give them. Help stamp out software-hoarding!
23 -------------------------------------------------------------------------*/
29 /*-----------------------------------------------------------------*/
30 /* global variables */
32 set *iCodeChain = NULL;
42 symbol *returnLabel; /* function return label */
43 symbol *entryLabel; /* function entry label */
45 /*-----------------------------------------------------------------*/
46 /* forward definition of some functions */
47 operand *geniCodeDivision (operand *, operand *);
48 operand *geniCodeAssign (operand *, operand *, int);
49 operand *geniCodeArray (operand *, operand *,int);
50 operand *geniCodeArray2Ptr (operand *);
51 operand *geniCodeRValue (operand *, bool);
52 operand *geniCodeDerefPtr (operand *,int);
53 int isLvaluereq(int lvl);
55 #define PRINTFUNC(x) void x (FILE *of, iCode *ic, char *s)
56 /* forward definition of ic print functions */
57 PRINTFUNC (picGetValueAtAddr);
58 PRINTFUNC (picSetValueAtAddr);
59 PRINTFUNC (picAddrOf);
60 PRINTFUNC (picGeneric);
61 PRINTFUNC (picGenericOne);
63 PRINTFUNC (picAssign);
67 PRINTFUNC (picJumpTable);
68 PRINTFUNC (picInline);
69 PRINTFUNC (picReceive);
71 iCodeTable codeTable[] =
73 {'!', "not", picGenericOne, NULL},
74 {'~', "~", picGenericOne, NULL},
75 {RRC, "rrc", picGenericOne, NULL},
76 {RLC, "rlc", picGenericOne, NULL},
77 {GETHBIT, "ghbit", picGenericOne, NULL},
78 {UNARYMINUS, "-", picGenericOne, NULL},
79 {IPUSH, "push", picGenericOne, NULL},
80 {IPOP, "pop", picGenericOne, NULL},
81 {CALL, "call", picGenericOne, NULL},
82 {PCALL, "pcall", picGenericOne, NULL},
83 {FUNCTION, "proc", picGenericOne, NULL},
84 {ENDFUNCTION, "eproc", picGenericOne, NULL},
85 {RETURN, "ret", picGenericOne, NULL},
86 {'+', "+", picGeneric, NULL},
87 {'-', "-", picGeneric, NULL},
88 {'*', "*", picGeneric, NULL},
89 {'/', "/", picGeneric, NULL},
90 {'%', "%", picGeneric, NULL},
91 {'>', ">", picGeneric, NULL},
92 {'<', "<", picGeneric, NULL},
93 {LE_OP, "<=", picGeneric, NULL},
94 {GE_OP, ">=", picGeneric, NULL},
95 {EQ_OP, "==", picGeneric, NULL},
96 {NE_OP, "!=", picGeneric, NULL},
97 {AND_OP, "&&", picGeneric, NULL},
98 {OR_OP, "||", picGeneric, NULL},
99 {'^', "^", picGeneric, NULL},
100 {'|', "|", picGeneric, NULL},
101 {BITWISEAND, "&", picGeneric, NULL},
102 {LEFT_OP, "<<", picGeneric, NULL},
103 {RIGHT_OP, ">>", picGeneric, NULL},
104 {GET_VALUE_AT_ADDRESS, "@", picGetValueAtAddr, NULL},
105 {ADDRESS_OF, "&", picAddrOf, NULL},
106 {CAST, "<>", picCast, NULL},
107 {'=', ":=", picAssign, NULL},
108 {LABEL, "", picLabel, NULL},
109 {GOTO, "", picGoto, NULL},
110 {JUMPTABLE, "jtab", picJumpTable, NULL},
111 {IFX, "if", picIfx, NULL},
112 {INLINEASM, "", picInline, NULL},
113 {RECEIVE, "recv", picReceive, NULL},
114 {SEND, "send", picGenericOne, NULL},
115 {ARRAYINIT, "arrayInit", picGenericOne, NULL},
118 /*-----------------------------------------------------------------*/
119 /* checkConstantRange: check a constant against the type */
120 /*-----------------------------------------------------------------*/
122 /* pedantic=0: allmost anything is allowed as long as the absolute
123 value is within the bit range of the type, and -1 is treated as
124 0xf..f for unsigned types (e.g. in assign)
125 pedantic=1: -1==-1, not allowed for unsigned types (e.g. in compare)
126 pedantic>1: "char c=200" is not allowed (evaluates to -56)
129 void checkConstantRange(sym_link *ltype, value *val, char *msg,
136 max = pow ((double)2.0, (double)bitsForType(ltype));
138 if (SPEC_LONG(val->type)) {
139 if (SPEC_USIGN(val->type)) {
140 v=SPEC_CVAL(val->type).v_ulong;
142 v=SPEC_CVAL(val->type).v_long;
145 if (SPEC_USIGN(val->type)) {
146 v=SPEC_CVAL(val->type).v_uint;
148 v=SPEC_CVAL(val->type).v_int;
154 // this could be a good idea
155 if (options.pedantic)
159 if (SPEC_NOUN(ltype)==FLOAT) {
164 if (!SPEC_USIGN(val->type) && v<0) {
166 if (SPEC_USIGN(ltype) && (pedantic>1)) {
172 // if very pedantic: "char c=200" is not allowed
173 if (pedantic>1 && !SPEC_USIGN(ltype)) {
174 max = max/2 + negative;
181 #if 0 // temporary disabled, leaving the warning as a reminder
183 SNPRINTF (message, sizeof(message), "for %s %s in %s",
184 SPEC_USIGN(ltype) ? "unsigned" : "signed",
185 nounName(ltype), msg);
186 werror (W_CONST_RANGE, message);
194 /*-----------------------------------------------------------------*/
195 /* operandName - returns the name of the operand */
196 /*-----------------------------------------------------------------*/
198 printOperand (operand * op, FILE * file)
215 opetype = getSpec (operandType (op));
216 if (SPEC_NOUN (opetype) == V_FLOAT)
217 fprintf (file, "%g {", SPEC_CVAL (opetype).v_float);
219 fprintf (file, "0x%x {", (int) floatFromVal (op->operand.valOperand));
220 printTypeChain (operandType (op), file);
227 fprintf (file, "%s [k%d lr%d:%d so:%d]{ ia%d re%d rm%d nos%d ru%d dp%d}", /*{ar%d rm%d ru%d p%d a%d u%d i%d au%d k%d ks%d}" , */
228 (OP_SYMBOL (op)->rname[0] ? OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name),
230 OP_LIVEFROM (op), OP_LIVETO (op),
231 OP_SYMBOL (op)->stack,
232 op->isaddr, OP_SYMBOL (op)->isreqv,
233 OP_SYMBOL (op)->remat,OP_SYMBOL(op)->noSpilLoc,
234 OP_SYMBOL(op)->ruonly,OP_SYMBOL(op)->dptr
238 printTypeChain (operandType (op), file);
239 if (SPIL_LOC (op) && IS_ITEMP (op))
240 fprintf (file, "}{ sir@ %s", SPIL_LOC (op)->rname);
245 /* if assigned to registers */
246 if (OP_SYMBOL (op)->nRegs)
248 if (OP_SYMBOL (op)->isspilt)
250 if (!OP_SYMBOL (op)->remat)
251 if (OP_SYMBOL (op)->usl.spillLoc)
252 fprintf (file, "[%s]", (OP_SYMBOL (op)->usl.spillLoc->rname[0] ?
253 OP_SYMBOL (op)->usl.spillLoc->rname :
254 OP_SYMBOL (op)->usl.spillLoc->name));
256 fprintf (file, "[err]");
258 fprintf (file, "[remat]");
264 for (i = 0; i < OP_SYMBOL (op)->nRegs; i++)
265 fprintf (file, "%s ", port->getRegName (OP_SYMBOL (op)->regs[i]));
270 fprintf (file, "%s", (OP_SYMBOL (op)->rname[0] ?
271 OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name));
272 /* if assigned to registers */
273 if (OP_SYMBOL (op)->nRegs && !OP_SYMBOL (op)->isspilt)
277 for (i = 0; i < OP_SYMBOL (op)->nRegs; i++)
278 fprintf (file, "%s ", (OP_SYMBOL (op)->regs[i] ?
279 OP_SYMBOL (op)->regs[i]->name :
288 printTypeChain (op->operand.typeOperand, file);
294 fprintf (file, "\n");
299 /*-----------------------------------------------------------------*/
300 /* print functions */
301 /*-----------------------------------------------------------------*/
302 PRINTFUNC (picGetValueAtAddr)
305 printOperand (IC_RESULT (ic), of);
308 printOperand (IC_LEFT (ic), of);
314 PRINTFUNC (picSetValueAtAddr)
318 printOperand (IC_LEFT (ic), of);
319 fprintf (of, "] = ");
320 printOperand (IC_RIGHT (ic), of);
324 PRINTFUNC (picAddrOf)
327 printOperand (IC_RESULT (ic), of);
328 if (IS_ITEMP (IC_LEFT (ic)))
331 fprintf (of, " = &[");
332 printOperand (IC_LEFT (ic), of);
335 if (IS_ITEMP (IC_LEFT (ic)))
336 fprintf (of, " offsetAdd ");
339 printOperand (IC_RIGHT (ic), of);
341 if (IS_ITEMP (IC_LEFT (ic)))
347 PRINTFUNC (picJumpTable)
352 fprintf (of, "%s\t", s);
353 printOperand (IC_JTCOND (ic), of);
355 for (sym = setFirstItem (IC_JTLABELS (ic)); sym;
356 sym = setNextItem (IC_JTLABELS (ic)))
357 fprintf (of, "\t\t\t%s\n", sym->name);
360 PRINTFUNC (picGeneric)
363 printOperand (IC_RESULT (ic), of);
365 printOperand (IC_LEFT (ic), of);
366 fprintf (of, " %s ", s);
367 printOperand (IC_RIGHT (ic), of);
371 PRINTFUNC (picGenericOne)
376 printOperand (IC_RESULT (ic), of);
382 fprintf (of, "%s ", s);
383 printOperand (IC_LEFT (ic), of);
386 if (!IC_RESULT (ic) && !IC_LEFT (ic))
389 if (ic->op == SEND || ic->op == RECEIVE) {
390 fprintf(of,"{argreg = %d}",ic->argreg);
398 printOperand (IC_RESULT (ic), of);
400 printOperand (IC_LEFT (ic), of);
401 printOperand (IC_RIGHT (ic), of);
406 PRINTFUNC (picAssign)
410 if (IC_RESULT (ic)->isaddr && IS_ITEMP (IC_RESULT (ic)))
413 printOperand (IC_RESULT (ic), of);
415 if (IC_RESULT (ic)->isaddr && IS_ITEMP (IC_RESULT (ic)))
418 fprintf (of, " %s ", s);
419 printOperand (IC_RIGHT (ic), of);
426 fprintf (of, " %s($%d) :\n", IC_LABEL (ic)->name, IC_LABEL (ic)->key);
432 fprintf (of, " goto %s($%d)\n", IC_LABEL (ic)->name, IC_LABEL (ic)->key);
439 printOperand (IC_COND (ic), of);
442 fprintf (of, " == 0 goto %s($%d)\n", IC_FALSE (ic)->name, IC_FALSE (ic)->key);
445 fprintf (of, " != 0 goto %s($%d)\n", IC_TRUE (ic)->name, IC_TRUE (ic)->key);
447 fprintf (of, "\tzzgoto %s\n", IC_FALSE (ic)->name);
451 PRINTFUNC (picInline)
453 fprintf (of, "%s", IC_INLINE (ic));
456 PRINTFUNC (picReceive)
458 printOperand (IC_RESULT (ic), of);
459 fprintf (of, " = %s ", s);
460 printOperand (IC_LEFT (ic), of);
464 /*-----------------------------------------------------------------*/
465 /* piCode - prints one iCode */
466 /*-----------------------------------------------------------------*/
468 piCode (void *item, FILE * of)
476 icTab = getTableEntry (ic->op);
477 fprintf (stdout, "%s(%d:%d:%d:%d:%d)\t",
478 ic->filename, ic->lineno,
479 ic->seq, ic->key, ic->depth, ic->supportRtn);
480 icTab->iCodePrint (of, ic, icTab->printName);
486 printiCChain(ic,stdout);
488 /*-----------------------------------------------------------------*/
489 /* printiCChain - prints intermediate code for humans */
490 /*-----------------------------------------------------------------*/
492 printiCChain (iCode * icChain, FILE * of)
499 for (loop = icChain; loop; loop = loop->next)
501 if ((icTab = getTableEntry (loop->op)))
503 fprintf (of, "%s(l%d:s%d:k%d:d%d:s%d)\t",
504 loop->filename, loop->lineno,
505 loop->seq, loop->key, loop->depth, loop->supportRtn);
507 icTab->iCodePrint (of, loop, icTab->printName);
513 /*-----------------------------------------------------------------*/
514 /* newOperand - allocate, init & return a new iCode */
515 /*-----------------------------------------------------------------*/
521 op = Safe_alloc ( sizeof (operand));
527 /*-----------------------------------------------------------------*/
528 /* newiCode - create and return a new iCode entry initialised */
529 /*-----------------------------------------------------------------*/
531 newiCode (int op, operand * left, operand * right)
535 ic = Safe_alloc ( sizeof (iCode));
538 ic->filename = filename;
540 ic->level = scopeLevel;
542 ic->key = iCodeKey++;
544 IC_RIGHT (ic) = right;
549 /*-----------------------------------------------------------------*/
550 /* newiCode for conditional statements */
551 /*-----------------------------------------------------------------*/
553 newiCodeCondition (operand * condition,
559 if (IS_VOID(operandType(condition))) {
560 werror(E_VOID_VALUE_USED);
563 ic = newiCode (IFX, NULL, NULL);
564 IC_COND (ic) = condition;
565 IC_TRUE (ic) = trueLabel;
566 IC_FALSE (ic) = falseLabel;
570 /*-----------------------------------------------------------------*/
571 /* newiCodeLabelGoto - unconditional goto statement| label stmnt */
572 /*-----------------------------------------------------------------*/
574 newiCodeLabelGoto (int op, symbol * label)
578 ic = newiCode (op, NULL, NULL);
582 IC_RIGHT (ic) = NULL;
583 IC_RESULT (ic) = NULL;
587 /*-----------------------------------------------------------------*/
588 /* newiTemp - allocate & return a newItemp Variable */
589 /*-----------------------------------------------------------------*/
597 SNPRINTF (buffer, sizeof(buffer), "%s", s);
601 SNPRINTF (buffer, sizeof(buffer), "iTemp%d", iTempNum++);
604 itmp = newSymbol (buffer, 1);
605 strncpyz (itmp->rname, itmp->name, SDCC_NAME_MAX);
611 /*-----------------------------------------------------------------*/
612 /* newiTempLabel - creates a temp variable label */
613 /*-----------------------------------------------------------------*/
615 newiTempLabel (char *s)
619 /* check if this alredy exists */
620 if (s && (itmplbl = findSym (LabelTab, NULL, s)))
625 itmplbl = newSymbol (s, 1);
629 SNPRINTF (buffer, sizeof(buffer), "iTempLbl%d", iTempLblNum++);
630 itmplbl = newSymbol (buffer, 1);
635 itmplbl->key = labelKey++;
636 addSym (LabelTab, itmplbl, itmplbl->name, 0, 0, 0);
640 /*-----------------------------------------------------------------*/
641 /* newiTempPreheaderLabel - creates a new preheader label */
642 /*-----------------------------------------------------------------*/
644 newiTempPreheaderLabel ()
648 SNPRINTF (buffer, sizeof(buffer), "preHeaderLbl%d", iTempLblNum++);
649 itmplbl = newSymbol (buffer, 1);
653 itmplbl->key = labelKey++;
654 addSym (LabelTab, itmplbl, itmplbl->name, 0, 0, 0);
659 /*-----------------------------------------------------------------*/
660 /* initiCode - initialises some iCode related stuff */
661 /*-----------------------------------------------------------------*/
668 /*-----------------------------------------------------------------*/
669 /* copyiCode - make a copy of the iCode given */
670 /*-----------------------------------------------------------------*/
672 copyiCode (iCode * ic)
674 iCode *nic = newiCode (ic->op, NULL, NULL);
676 nic->lineno = ic->lineno;
677 nic->filename = ic->filename;
678 nic->block = ic->block;
679 nic->level = ic->level;
680 nic->parmBytes = ic->parmBytes;
682 /* deal with the special cases first */
686 IC_COND (nic) = operandFromOperand (IC_COND (ic));
687 IC_TRUE (nic) = IC_TRUE (ic);
688 IC_FALSE (nic) = IC_FALSE (ic);
692 IC_JTCOND (nic) = operandFromOperand (IC_JTCOND (ic));
693 IC_JTLABELS (nic) = IC_JTLABELS (ic);
698 IC_RESULT (nic) = operandFromOperand (IC_RESULT (ic));
699 IC_LEFT (nic) = operandFromOperand (IC_LEFT (ic));
703 IC_INLINE (nic) = IC_INLINE (ic);
707 IC_ARRAYILIST(nic) = IC_ARRAYILIST(ic);
711 IC_RESULT (nic) = operandFromOperand (IC_RESULT (ic));
712 IC_LEFT (nic) = operandFromOperand (IC_LEFT (ic));
713 IC_RIGHT (nic) = operandFromOperand (IC_RIGHT (ic));
719 /*-----------------------------------------------------------------*/
720 /* getTableEntry - gets the table entry for the given operator */
721 /*-----------------------------------------------------------------*/
723 getTableEntry (int oper)
727 for (i = 0; i < (sizeof (codeTable) / sizeof (iCodeTable)); i++)
728 if (oper == codeTable[i].icode)
729 return &codeTable[i];
734 /*-----------------------------------------------------------------*/
735 /* newiTempOperand - new intermediate temp operand */
736 /*-----------------------------------------------------------------*/
738 newiTempOperand (sym_link * type, char throwType)
741 operand *op = newOperand ();
745 itmp = newiTemp (NULL);
747 etype = getSpec (type);
749 if (IS_LITERAL (etype))
752 /* copy the type information */
754 itmp->etype = getSpec (itmp->type = (throwType ? type :
755 copyLinkChain (type)));
756 if (IS_LITERAL (itmp->etype))
758 SPEC_SCLS (itmp->etype) = S_REGISTER;
759 SPEC_OCLS (itmp->etype) = reg;
762 op->operand.symOperand = itmp;
763 op->key = itmp->key = ++operandKey;
767 /*-----------------------------------------------------------------*/
768 /* operandType - returns the type chain for an operand */
769 /*-----------------------------------------------------------------*/
771 operandType (operand * op)
773 /* depending on type of operand */
778 return op->operand.valOperand->type;
781 return op->operand.symOperand->type;
784 return op->operand.typeOperand;
786 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
787 " operand type not known ");
788 assert (0); /* should never come here */
789 /* Just to keep the compiler happy */
790 return (sym_link *) 0;
794 /*-----------------------------------------------------------------*/
795 /* isParamterToCall - will return 1 if op is a parameter to args */
796 /*-----------------------------------------------------------------*/
798 isParameterToCall (value * args, operand * op)
802 wassert (IS_SYMOP(op));
807 isSymbolEqual (op->operand.symOperand, tval->sym))
814 /*-----------------------------------------------------------------*/
815 /* isOperandGlobal - return 1 if operand is a global variable */
816 /*-----------------------------------------------------------------*/
818 isOperandGlobal (operand * op)
827 (op->operand.symOperand->level == 0 ||
828 IS_STATIC (op->operand.symOperand->etype) ||
829 IS_EXTERN (op->operand.symOperand->etype))
836 /*-----------------------------------------------------------------*/
837 /* isOperandVolatile - return 1 if the operand is volatile */
838 /*-----------------------------------------------------------------*/
840 isOperandVolatile (operand * op, bool chkTemp)
845 if (IS_ITEMP (op) && !chkTemp)
848 opetype = getSpec (optype = operandType (op));
850 if (IS_PTR (optype) && DCL_PTR_VOLATILE (optype))
853 if (IS_VOLATILE (opetype))
858 /*-----------------------------------------------------------------*/
859 /* isOperandLiteral - returns 1 if an operand contains a literal */
860 /*-----------------------------------------------------------------*/
862 isOperandLiteral (operand * op)
869 opetype = getSpec (operandType (op));
871 if (IS_LITERAL (opetype))
877 /*-----------------------------------------------------------------*/
878 /* isOperandInFarSpace - will return true if operand is in farSpace */
879 /*-----------------------------------------------------------------*/
881 isOperandInFarSpace (operand * op)
891 if (!IS_TRUE_SYMOP (op))
894 etype = SPIL_LOC (op)->etype;
900 etype = getSpec (operandType (op));
902 return (IN_FARSPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
905 /*------------------------------------------------------------------*/
906 /* isOperandInDirSpace - will return true if operand is in dirSpace */
907 /*------------------------------------------------------------------*/
909 isOperandInDirSpace (operand * op)
919 if (!IS_TRUE_SYMOP (op))
922 etype = SPIL_LOC (op)->etype;
928 etype = getSpec (operandType (op));
930 return (IN_DIRSPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
933 /*--------------------------------------------------------------------*/
934 /* isOperandInCodeSpace - will return true if operand is in codeSpace */
935 /*--------------------------------------------------------------------*/
937 isOperandInCodeSpace (operand * op)
947 etype = getSpec (operandType (op));
949 if (!IS_TRUE_SYMOP (op))
952 etype = SPIL_LOC (op)->etype;
958 etype = getSpec (operandType (op));
960 return (IN_CODESPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
963 /*-----------------------------------------------------------------*/
964 /* isOperandOnStack - will return true if operand is on stack */
965 /*-----------------------------------------------------------------*/
967 isOperandOnStack (operand * op)
977 etype = getSpec (operandType (op));
978 if (IN_STACK (etype) ||
979 OP_SYMBOL(op)->onStack ||
980 (SPIL_LOC(op) && SPIL_LOC(op)->onStack))
986 /*-----------------------------------------------------------------*/
987 /* operandLitValue - literal value of an operand */
988 /*-----------------------------------------------------------------*/
990 operandLitValue (operand * op)
992 assert (isOperandLiteral (op));
994 return floatFromVal (op->operand.valOperand);
997 /*-----------------------------------------------------------------*/
998 /* getBuiltInParms - returns parameters to a builtin functions */
999 /*-----------------------------------------------------------------*/
1000 iCode *getBuiltinParms (iCode *ic, int *pcount, operand **parms)
1005 /* builtin functions uses only SEND for parameters */
1006 while (ic->op != CALL) {
1007 assert(ic->op == SEND && ic->builtinSEND);
1008 ic->generated = 1; /* mark the icode as generated */
1009 parms[*pcount] = IC_LEFT(ic);
1015 /* make sure this is a builtin function call */
1016 assert(IS_SYMOP(IC_LEFT(ic)));
1017 ftype = operandType(IC_LEFT(ic));
1018 assert(IFFUNC_ISBUILTIN(ftype));
1022 /*-----------------------------------------------------------------*/
1023 /* operandOperation - perforoms operations on operands */
1024 /*-----------------------------------------------------------------*/
1026 operandOperation (operand * left, operand * right,
1027 int op, sym_link * type)
1029 sym_link *let , *ret=NULL;
1030 operand *retval = (operand *) 0;
1032 assert (isOperandLiteral (left));
1033 let = getSpec(operandType(left));
1035 assert (isOperandLiteral (right));
1036 ret = getSpec(operandType(left));
1042 retval = operandFromValue (valCastLiteral (type,
1043 operandLitValue (left) +
1044 operandLitValue (right)));
1047 retval = operandFromValue (valCastLiteral (type,
1048 operandLitValue (left) -
1049 operandLitValue (right)));
1052 retval = operandFromValue (valCastLiteral (type,
1053 operandLitValue (left) *
1054 operandLitValue (right)));
1057 if ((unsigned long) operandLitValue (right) == 0)
1059 werror (E_DIVIDE_BY_ZERO);
1064 retval = operandFromValue (valCastLiteral (type,
1065 operandLitValue (left) /
1066 operandLitValue (right)));
1069 if ((unsigned long) operandLitValue (right) == 0) {
1070 werror (E_DIVIDE_BY_ZERO);
1074 retval = operandFromLit ((SPEC_USIGN(let) ?
1075 (unsigned long) operandLitValue (left) :
1076 (long) operandLitValue (left)) %
1078 (unsigned long) operandLitValue (right) :
1079 (long) operandLitValue (right)));
1083 retval = operandFromLit ((SPEC_USIGN(let) ?
1084 (unsigned long) operandLitValue (left) :
1085 (long) operandLitValue (left)) <<
1087 (unsigned long) operandLitValue (right) :
1088 (long) operandLitValue (right)));
1091 double lval = operandLitValue(left), rval = operandLitValue(right);
1093 switch ((SPEC_USIGN(let) ? 2 : 0) + (SPEC_USIGN(ret) ? 1 : 0))
1095 case 0: // left=unsigned right=unsigned
1096 res=(unsigned long)lval >> (unsigned long)rval;
1098 case 1: // left=unsigned right=signed
1099 res=(unsigned long)lval >> (signed long)rval;
1101 case 2: // left=signed right=unsigned
1102 res=(signed long)lval >> (unsigned long)rval;
1104 case 3: // left=signed right=signed
1105 res=(signed long)lval >> (signed long)rval;
1108 retval = operandFromLit (res);
1112 retval = operandFromLit (operandLitValue (left) ==
1113 operandLitValue (right));
1116 retval = operandFromLit (operandLitValue (left) <
1117 operandLitValue (right));
1120 retval = operandFromLit (operandLitValue (left) <=
1121 operandLitValue (right));
1124 retval = operandFromLit (operandLitValue (left) !=
1125 operandLitValue (right));
1128 retval = operandFromLit (operandLitValue (left) >
1129 operandLitValue (right));
1132 retval = operandFromLit (operandLitValue (left) >=
1133 operandLitValue (right));
1136 retval = operandFromLit ((long)operandLitValue(left) &
1137 (long)operandLitValue(right));
1140 retval = operandFromLit ((long)operandLitValue (left) |
1141 (long)operandLitValue (right));
1144 retval = operandFromLit ((long)operandLitValue (left) ^
1145 (long)operandLitValue (right));
1148 retval = operandFromLit (operandLitValue (left) &&
1149 operandLitValue (right));
1152 retval = operandFromLit (operandLitValue (left) ||
1153 operandLitValue (right));
1157 long i = (long) operandLitValue (left);
1159 retval = operandFromLit ((i >> (getSize (operandType (left)) * 8 - 1)) |
1165 long i = (long) operandLitValue (left);
1167 retval = operandFromLit ((i << (getSize (operandType (left)) * 8 - 1)) |
1173 retval = operandFromLit (-1 * operandLitValue (left));
1177 retval = operandFromLit (~((long) operandLitValue (left)));
1181 retval = operandFromLit (!operandLitValue (left));
1185 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1186 " operandOperation invalid operator ");
1194 /*-----------------------------------------------------------------*/
1195 /* isOperandEqual - compares two operand & return 1 if they r = */
1196 /*-----------------------------------------------------------------*/
1198 isOperandEqual (operand * left, operand * right)
1200 /* if the pointers are equal then they are equal */
1204 /* if either of them null then false */
1205 if (!left || !right)
1208 if (left->type != right->type)
1211 if (IS_SYMOP (left) && IS_SYMOP (right))
1212 return left->key == right->key;
1214 /* if types are the same */
1218 return isSymbolEqual (left->operand.symOperand,
1219 right->operand.symOperand);
1221 return (floatFromVal (left->operand.valOperand) ==
1222 floatFromVal (right->operand.valOperand));
1224 if (compareType (left->operand.typeOperand,
1225 right->operand.typeOperand) == 1)
1232 /*-------------------------------------------------------------------*/
1233 /* isiCodeEqual - compares two iCodes are equal, returns true if yes */
1234 /*-------------------------------------------------------------------*/
1236 isiCodeEqual (iCode * left, iCode * right)
1238 /* if the same pointer */
1242 /* if either of them null */
1243 if (!left || !right)
1246 /* if operand are the same */
1247 if (left->op == right->op)
1250 /* compare all the elements depending on type */
1251 if (left->op != IFX)
1253 if (!isOperandEqual (IC_LEFT (left), IC_LEFT (right)))
1255 if (!isOperandEqual (IC_RIGHT (left), IC_RIGHT (right)))
1261 if (!isOperandEqual (IC_COND (left), IC_COND (right)))
1263 if (!isSymbolEqual (IC_TRUE (left), IC_TRUE (right)))
1265 if (!isSymbolEqual (IC_FALSE (left), IC_FALSE (right)))
1274 /*-----------------------------------------------------------------*/
1275 /* newiTempFromOp - create a temp Operand with same attributes */
1276 /*-----------------------------------------------------------------*/
1278 newiTempFromOp (operand * op)
1288 nop = newiTempOperand (operandType (op), TRUE);
1289 nop->isaddr = op->isaddr;
1290 nop->isvolatile = op->isvolatile;
1291 nop->isGlobal = op->isGlobal;
1292 nop->isLiteral = op->isLiteral;
1293 nop->usesDefs = op->usesDefs;
1294 nop->isParm = op->isParm;
1298 /*-----------------------------------------------------------------*/
1299 /* operand from operand - creates an operand holder for the type */
1300 /*-----------------------------------------------------------------*/
1302 operandFromOperand (operand * op)
1308 nop = newOperand ();
1309 nop->type = op->type;
1310 nop->isaddr = op->isaddr;
1312 nop->isvolatile = op->isvolatile;
1313 nop->isGlobal = op->isGlobal;
1314 nop->isLiteral = op->isLiteral;
1315 nop->usesDefs = op->usesDefs;
1316 nop->isParm = op->isParm;
1321 nop->operand.symOperand = op->operand.symOperand;
1324 nop->operand.valOperand = op->operand.valOperand;
1327 nop->operand.typeOperand = op->operand.typeOperand;
1334 /*-----------------------------------------------------------------*/
1335 /* opFromOpWithDU - makes a copy of the operand and DU chains */
1336 /*-----------------------------------------------------------------*/
1338 opFromOpWithDU (operand * op, bitVect * defs, bitVect * uses)
1340 operand *nop = operandFromOperand (op);
1342 if (nop->type == SYMBOL)
1344 OP_SYMBOL (nop)->defs = bitVectCopy (defs);
1345 OP_SYMBOL (nop)->uses = bitVectCopy (uses);
1351 /*-----------------------------------------------------------------*/
1352 /* operandFromSymbol - creates an operand from a symbol */
1353 /*-----------------------------------------------------------------*/
1355 operandFromSymbol (symbol * sym)
1360 /* if the symbol's type is a literal */
1361 /* then it is an enumerator type */
1362 if (IS_LITERAL (sym->etype) && SPEC_ENUM (sym->etype))
1363 return operandFromValue (valFromType (sym->etype));
1366 sym->key = ++operandKey;
1368 /* if this an implicit variable, means struct/union */
1369 /* member so just return it */
1370 if (sym->implicit || IS_FUNC (sym->type))
1374 op->operand.symOperand = sym;
1376 op->isvolatile = isOperandVolatile (op, TRUE);
1377 op->isGlobal = isOperandGlobal (op);
1381 /* under the following conditions create a
1382 register equivalent for a local symbol */
1383 if (sym->level && sym->etype && SPEC_OCLS (sym->etype) &&
1384 (IN_FARSPACE (SPEC_OCLS (sym->etype)) &&
1385 (!(options.model == MODEL_FLAT24)) ) &&
1386 options.stackAuto == 0)
1389 if (!IS_AGGREGATE (sym->type) && /* not an aggregate */
1390 !IS_FUNC (sym->type) && /* not a function */
1391 !sym->_isparm && /* not a parameter */
1392 sym->level && /* is a local variable */
1393 !sym->addrtaken && /* whose address has not been taken */
1394 !sym->reqv && /* does not already have a reg equivalence */
1395 !IS_VOLATILE (sym->etype) && /* not declared as volatile */
1396 !IS_STATIC (sym->etype) && /* and not declared static */
1397 !sym->islbl && /* not a label */
1398 ok && /* farspace check */
1399 !IS_BITVAR (sym->etype) /* not a bit variable */
1403 /* we will use it after all optimizations
1404 and before liveRange calculation */
1405 sym->reqv = newiTempOperand (sym->type, 0);
1406 sym->reqv->key = sym->key;
1407 OP_SYMBOL (sym->reqv)->key = sym->key;
1408 OP_SYMBOL (sym->reqv)->isreqv = 1;
1409 OP_SYMBOL (sym->reqv)->islocal = 1;
1410 OP_SYMBOL (sym->reqv)->onStack = sym->onStack;
1411 SPIL_LOC (sym->reqv) = sym;
1414 if (!IS_AGGREGATE (sym->type))
1418 op->operand.symOperand = sym;
1421 op->isvolatile = isOperandVolatile (op, TRUE);
1422 op->isGlobal = isOperandGlobal (op);
1423 op->isPtr = IS_PTR (operandType (op));
1424 op->isParm = sym->_isparm;
1429 /* itemp = &[_symbol] */
1431 ic = newiCode (ADDRESS_OF, newOperand (), NULL);
1432 IC_LEFT (ic)->type = SYMBOL;
1433 IC_LEFT (ic)->operand.symOperand = sym;
1434 IC_LEFT (ic)->key = sym->key;
1435 (IC_LEFT (ic))->isvolatile = isOperandVolatile (IC_LEFT (ic), TRUE);
1436 (IC_LEFT (ic))->isGlobal = isOperandGlobal (IC_LEFT (ic));
1437 IC_LEFT (ic)->isPtr = IS_PTR (operandType (IC_LEFT (ic)));
1440 IC_RESULT (ic) = newiTempOperand (sym->type, 0);
1441 if (IS_ARRAY (sym->type))
1443 IC_RESULT (ic) = geniCodeArray2Ptr (IC_RESULT (ic));
1444 IC_RESULT (ic)->isaddr = 0;
1447 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (sym->type));
1451 return IC_RESULT (ic);
1454 /*-----------------------------------------------------------------*/
1455 /* operandFromValue - creates an operand from value */
1456 /*-----------------------------------------------------------------*/
1458 operandFromValue (value * val)
1462 /* if this is a symbol then do the symbol thing */
1464 return operandFromSymbol (val->sym);
1466 /* this is not a symbol */
1469 op->operand.valOperand = val;
1470 op->isLiteral = isOperandLiteral (op);
1474 /*-----------------------------------------------------------------*/
1475 /* operandFromLink - operand from typeChain */
1476 /*-----------------------------------------------------------------*/
1478 operandFromLink (sym_link * type)
1482 /* operand from sym_link */
1488 op->operand.typeOperand = copyLinkChain (type);
1492 /*-----------------------------------------------------------------*/
1493 /* operandFromLit - makes an operand from a literal value */
1494 /*-----------------------------------------------------------------*/
1496 operandFromLit (double i)
1498 return operandFromValue (valueFromLit (i));
1501 /*-----------------------------------------------------------------*/
1502 /* operandFromAst - creates an operand from an ast */
1503 /*-----------------------------------------------------------------*/
1505 operandFromAst (ast * tree,int lvl)
1511 /* depending on type do */
1515 return ast2iCode (tree,lvl+1);
1519 return operandFromValue (tree->opval.val);
1523 return operandFromLink (tree->opval.lnk);
1527 /* Just to keep the comiler happy */
1528 return (operand *) 0;
1531 /*-----------------------------------------------------------------*/
1532 /* setOperandType - sets the operand's type to the given type */
1533 /*-----------------------------------------------------------------*/
1535 setOperandType (operand * op, sym_link * type)
1537 /* depending on the type of operand */
1542 op->operand.valOperand->etype =
1543 getSpec (op->operand.valOperand->type =
1544 copyLinkChain (type));
1548 if (op->operand.symOperand->isitmp)
1549 op->operand.symOperand->etype =
1550 getSpec (op->operand.symOperand->type =
1551 copyLinkChain (type));
1553 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1554 "attempt to modify type of source");
1558 op->operand.typeOperand = copyLinkChain (type);
1563 /*-----------------------------------------------------------------*/
1564 /* Get size in byte of ptr need to access an array */
1565 /*-----------------------------------------------------------------*/
1567 getArraySizePtr (operand * op)
1569 sym_link *ltype = operandType(op);
1573 int size = getSize(ltype);
1574 return(IS_GENPTR(ltype)?(size-1):size);
1579 sym_link *letype = getSpec(ltype);
1580 switch (PTR_TYPE (SPEC_OCLS (letype)))
1592 return (GPTRSIZE-1);
1601 /*-----------------------------------------------------------------*/
1602 /* perform "usual unary conversions" */
1603 /*-----------------------------------------------------------------*/
1605 usualUnaryConversions (operand * op)
1607 if (IS_INTEGRAL (operandType (op)))
1609 if (getSize (operandType (op)) < (unsigned int) INTSIZE)
1612 return geniCodeCast (INTTYPE, op, TRUE);
1618 /*-----------------------------------------------------------------*/
1619 /* perform "usual binary conversions" */
1620 /*-----------------------------------------------------------------*/
1622 usualBinaryConversions (operand ** op1, operand ** op2)
1625 sym_link *rtype = operandType (*op2);
1626 sym_link *ltype = operandType (*op1);
1628 ctype = computeType (ltype, rtype);
1630 *op1 = geniCodeCast (ctype, *op1, TRUE);
1631 *op2 = geniCodeCast (ctype, *op2, TRUE);
1636 /*-----------------------------------------------------------------*/
1637 /* geniCodeValueAtAddress - generate intermeditate code for value */
1639 /*-----------------------------------------------------------------*/
1641 geniCodeRValue (operand * op, bool force)
1644 sym_link *type = operandType (op);
1645 sym_link *etype = getSpec (type);
1647 /* if this is an array & already */
1648 /* an address then return this */
1649 if (IS_AGGREGATE (type) ||
1650 (IS_PTR (type) && !force && !op->isaddr))
1651 return operandFromOperand (op);
1653 /* if this is not an address then must be */
1654 /* rvalue already so return this one */
1658 /* if this is not a temp symbol then */
1659 if (!IS_ITEMP (op) &&
1661 !IN_FARSPACE (SPEC_OCLS (etype)))
1663 op = operandFromOperand (op);
1668 if (IS_SPEC (type) &&
1669 IS_TRUE_SYMOP (op) &&
1670 (!IN_FARSPACE (SPEC_OCLS (etype)) ||
1671 (options.model == MODEL_FLAT24) ))
1673 op = operandFromOperand (op);
1678 ic = newiCode (GET_VALUE_AT_ADDRESS, op, NULL);
1679 if (IS_PTR (type) && op->isaddr && force)
1682 type = copyLinkChain (type);
1684 IC_RESULT (ic) = newiTempOperand (type, 1);
1685 IC_RESULT (ic)->isaddr = 0;
1687 /* ic->supportRtn = ((IS_GENPTR(type) | op->isGptr) & op->isaddr); */
1691 return IC_RESULT (ic);
1694 /*-----------------------------------------------------------------*/
1695 /* geniCodeCast - changes the value from one type to another */
1696 /*-----------------------------------------------------------------*/
1698 geniCodeCast (sym_link * type, operand * op, bool implicit)
1702 sym_link *opetype = getSpec (optype = operandType (op));
1706 /* one of them has size zero then error */
1707 if (IS_VOID (optype))
1709 werror (E_CAST_ZERO);
1713 /* if the operand is already the desired type then do nothing */
1714 if (compareType (type, optype) == 1)
1717 /* if this is a literal then just change the type & return */
1718 if (IS_LITERAL (opetype) && op->type == VALUE && !IS_PTR (type) && !IS_PTR (optype))
1719 return operandFromValue (valCastLiteral (type,
1720 operandLitValue (op)));
1722 /* if casting to/from pointers, do some checking */
1723 if (IS_PTR(type)) { // to a pointer
1724 if (!IS_PTR(optype) && !IS_FUNC(optype) && !IS_AGGREGATE(optype)) { // from a non pointer
1725 if (IS_INTEGRAL(optype)) {
1726 // maybe this is NULL, than it's ok.
1727 if (!(IS_LITERAL(optype) && (SPEC_CVAL(optype).v_ulong ==0))) {
1728 if (!TARGET_IS_Z80 && !TARGET_IS_GBZ80 && IS_GENPTR(type)) {
1729 // no way to set the storage
1730 if (IS_LITERAL(optype)) {
1731 werror(E_LITERAL_GENERIC);
1734 werror(E_NONPTR2_GENPTR);
1737 } else if (implicit) {
1738 werror(W_INTEGRAL2PTR_NOCAST);
1743 // shouldn't do that with float, array or structure unless to void
1744 if (!IS_VOID(getSpec(type)) &&
1745 !(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1746 werror(E_INCOMPAT_TYPES);
1750 } else { // from a pointer to a pointer
1751 if (!TARGET_IS_Z80 && !TARGET_IS_GBZ80) {
1752 // if not a pointer to a function
1753 if (!(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1754 if (implicit) { // if not to generic, they have to match
1755 if ((!IS_GENPTR(type) && (DCL_TYPE(optype) != DCL_TYPE(type)))) {
1756 werror(E_INCOMPAT_PTYPES);
1763 } else { // to a non pointer
1764 if (IS_PTR(optype)) { // from a pointer
1765 if (implicit) { // sneaky
1766 if (IS_INTEGRAL(type)) {
1767 werror(W_PTR2INTEGRAL_NOCAST);
1769 } else { // shouldn't do that with float, array or structure
1770 werror(E_INCOMPAT_TYPES);
1777 printFromToType (optype, type);
1780 /* if they are the same size create an assignment */
1781 if (getSize (type) == getSize (optype) &&
1782 !IS_BITFIELD (type) &&
1784 !IS_FLOAT (optype) &&
1785 ((IS_SPEC (type) && IS_SPEC (optype)) ||
1786 (!IS_SPEC (type) && !IS_SPEC (optype))))
1789 ic = newiCode ('=', NULL, op);
1790 IC_RESULT (ic) = newiTempOperand (type, 0);
1791 SPIL_LOC (IC_RESULT (ic)) =
1792 (IS_TRUE_SYMOP (op) ? OP_SYMBOL (op) : NULL);
1793 IC_RESULT (ic)->isaddr = 0;
1797 ic = newiCode (CAST, operandFromLink (type),
1798 geniCodeRValue (op, FALSE));
1800 IC_RESULT (ic) = newiTempOperand (type, 0);
1803 /* preserve the storage class & output class */
1804 /* of the original variable */
1805 restype = getSpec (operandType (IC_RESULT (ic)));
1806 if (!IS_LITERAL(opetype))
1807 SPEC_SCLS (restype) = SPEC_SCLS (opetype);
1808 SPEC_OCLS (restype) = SPEC_OCLS (opetype);
1811 return IC_RESULT (ic);
1814 /*-----------------------------------------------------------------*/
1815 /* geniCodeLabel - will create a Label */
1816 /*-----------------------------------------------------------------*/
1818 geniCodeLabel (symbol * label)
1822 ic = newiCodeLabelGoto (LABEL, label);
1826 /*-----------------------------------------------------------------*/
1827 /* geniCodeGoto - will create a Goto */
1828 /*-----------------------------------------------------------------*/
1830 geniCodeGoto (symbol * label)
1834 ic = newiCodeLabelGoto (GOTO, label);
1838 /*-----------------------------------------------------------------*/
1839 /* geniCodeMultiply - gen intermediate code for multiplication */
1840 /*-----------------------------------------------------------------*/
1842 geniCodeMultiply (operand * left, operand * right,int resultIsInt)
1849 /* if they are both literal then we know the result */
1850 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1851 return operandFromValue (valMult (left->operand.valOperand,
1852 right->operand.valOperand));
1854 if (IS_LITERAL(retype)) {
1855 p2 = powof2 ((unsigned long) floatFromVal (right->operand.valOperand));
1858 resType = usualBinaryConversions (&left, &right);
1860 rtype = operandType (right);
1861 retype = getSpec (rtype);
1862 ltype = operandType (left);
1863 letype = getSpec (ltype);
1867 SPEC_NOUN(getSpec(resType))=V_INT;
1870 /* if the right is a literal & power of 2 */
1871 /* then make it a left shift */
1872 /* code generated for 1 byte * 1 byte literal = 2 bytes result is more
1873 efficient in most cases than 2 bytes result = 2 bytes << literal
1874 if port has 1 byte muldiv */
1875 if (p2 && !IS_FLOAT (letype) &&
1876 !((resultIsInt) && (getSize (resType) != getSize (ltype)) &&
1877 (port->support.muldiv == 1)))
1879 if ((resultIsInt) && (getSize (resType) != getSize (ltype)))
1881 /* LEFT_OP need same size for left and result, */
1882 left = geniCodeCast (resType, left, TRUE);
1883 ltype = operandType (left);
1885 ic = newiCode (LEFT_OP, left, operandFromLit (p2)); /* left shift */
1889 ic = newiCode ('*', left, right); /* normal multiplication */
1890 /* if the size left or right > 1 then support routine */
1891 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1895 IC_RESULT (ic) = newiTempOperand (resType, 1);
1898 return IC_RESULT (ic);
1901 /*-----------------------------------------------------------------*/
1902 /* geniCodeDivision - gen intermediate code for division */
1903 /*-----------------------------------------------------------------*/
1905 geniCodeDivision (operand * left, operand * right)
1910 sym_link *rtype = operandType (right);
1911 sym_link *retype = getSpec (rtype);
1912 sym_link *ltype = operandType (left);
1913 sym_link *letype = getSpec (ltype);
1915 resType = usualBinaryConversions (&left, &right);
1917 /* if the right is a literal & power of 2
1918 and left is unsigned then make it a
1920 if (IS_LITERAL (retype) &&
1921 !IS_FLOAT (letype) &&
1922 SPEC_USIGN(letype) &&
1923 (p2 = powof2 ((unsigned long)
1924 floatFromVal (right->operand.valOperand)))) {
1925 ic = newiCode (RIGHT_OP, left, operandFromLit (p2)); /* right shift */
1929 ic = newiCode ('/', left, right); /* normal division */
1930 /* if the size left or right > 1 then support routine */
1931 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1934 IC_RESULT (ic) = newiTempOperand (resType, 0);
1937 return IC_RESULT (ic);
1939 /*-----------------------------------------------------------------*/
1940 /* geniCodeModulus - gen intermediate code for modulus */
1941 /*-----------------------------------------------------------------*/
1943 geniCodeModulus (operand * left, operand * right)
1949 /* if they are both literal then we know the result */
1950 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1951 return operandFromValue (valMod (left->operand.valOperand,
1952 right->operand.valOperand));
1954 resType = usualBinaryConversions (&left, &right);
1956 /* now they are the same size */
1957 ic = newiCode ('%', left, right);
1959 /* if the size left or right > 1 then support routine */
1960 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1962 IC_RESULT (ic) = newiTempOperand (resType, 0);
1965 return IC_RESULT (ic);
1968 /*-----------------------------------------------------------------*/
1969 /* geniCodePtrPtrSubtract - subtracts pointer from pointer */
1970 /*-----------------------------------------------------------------*/
1972 geniCodePtrPtrSubtract (operand * left, operand * right)
1978 /* if they are both literals then */
1979 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1981 result = operandFromValue (valMinus (left->operand.valOperand,
1982 right->operand.valOperand));
1986 ic = newiCode ('-', left, right);
1988 IC_RESULT (ic) = result = newiTempOperand (newIntLink (), 1);
1992 if (IS_VOID(ltype->next) || IS_VOID(rtype->next)) {
1996 // should we really do this? is this ANSI?
1997 return geniCodeDivision (result,
1998 operandFromLit (getSize (ltype->next)));
2001 /*-----------------------------------------------------------------*/
2002 /* geniCodeSubtract - generates code for subtraction */
2003 /*-----------------------------------------------------------------*/
2005 geniCodeSubtract (operand * left, operand * right)
2012 /* if they both pointers then */
2013 if ((IS_PTR (ltype) || IS_ARRAY (ltype)) &&
2014 (IS_PTR (rtype) || IS_ARRAY (rtype)))
2015 return geniCodePtrPtrSubtract (left, right);
2017 /* if they are both literal then we know the result */
2018 if (IS_LITERAL (letype) && IS_LITERAL (retype)
2019 && left->isLiteral && right->isLiteral)
2020 return operandFromValue (valMinus (left->operand.valOperand,
2021 right->operand.valOperand));
2023 /* if left is an array or pointer */
2024 if (IS_PTR (ltype) || IS_ARRAY (ltype))
2026 isarray = left->isaddr;
2027 right = geniCodeMultiply (right,
2028 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
2029 resType = copyLinkChain (IS_ARRAY (ltype) ? ltype->next : ltype);
2032 { /* make them the same size */
2033 resType = usualBinaryConversions (&left, &right);
2036 ic = newiCode ('-', left, right);
2038 IC_RESULT (ic) = newiTempOperand (resType, 1);
2039 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
2041 /* if left or right is a float */
2042 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
2046 return IC_RESULT (ic);
2049 /*-----------------------------------------------------------------*/
2050 /* geniCodeAdd - generates iCode for addition */
2051 /*-----------------------------------------------------------------*/
2053 geniCodeAdd (operand * left, operand * right, int lvl)
2062 /* if left is an array then array access */
2063 if (IS_ARRAY (ltype))
2064 return geniCodeArray (left, right,lvl);
2067 /* if the right side is LITERAL zero */
2068 /* return the left side */
2069 if (IS_LITERAL (retype) && right->isLiteral && !floatFromVal (valFromType (retype)))
2072 /* if left is literal zero return right */
2073 if (IS_LITERAL (letype) && left->isLiteral && !floatFromVal (valFromType (letype)))
2076 /* if left is a pointer then size */
2077 if (IS_PTR (ltype) || IS_ARRAY(ltype))
2079 isarray = left->isaddr;
2080 // there is no need to multiply with 1
2081 if (getSize(ltype->next)!=1) {
2082 size = operandFromLit (getSize (ltype->next));
2083 right = geniCodeMultiply (right, size, (getArraySizePtr(left) >= INTSIZE));
2085 resType = copyLinkChain (ltype);
2088 { // make them the same size
2089 resType = usualBinaryConversions (&left, &right);
2092 /* if they are both literals then we know */
2093 if (IS_LITERAL (letype) && IS_LITERAL (retype)
2094 && left->isLiteral && right->isLiteral)
2095 return operandFromValue (valPlus (valFromType (letype),
2096 valFromType (retype)));
2098 ic = newiCode ('+', left, right);
2100 IC_RESULT (ic) = newiTempOperand (resType, 1);
2101 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
2103 /* if left or right is a float then support
2105 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
2110 return IC_RESULT (ic);
2114 /*-----------------------------------------------------------------*/
2115 /* aggrToPtr - changes an aggregate to pointer to an aggregate */
2116 /*-----------------------------------------------------------------*/
2118 aggrToPtr (sym_link * type, bool force)
2124 if (IS_PTR (type) && !force)
2127 etype = getSpec (type);
2128 ptype = newLink (DECLARATOR);
2132 /* if the output class is code */
2133 if ((DCL_TYPE (ptype) = PTR_TYPE (SPEC_OCLS (etype))) == CPOINTER)
2134 DCL_PTR_CONST (ptype) = port->mem.code_ro;
2136 /* if the variable was declared a constant */
2137 /* then the pointer points to a constant */
2138 if (IS_CONSTANT (etype))
2139 DCL_PTR_CONST (ptype) = 1;
2141 /* the variable was volatile then pointer to volatile */
2142 if (IS_VOLATILE (etype))
2143 DCL_PTR_VOLATILE (ptype) = 1;
2148 /*-----------------------------------------------------------------*/
2149 /* geniCodeArray2Ptr - array to pointer */
2150 /*-----------------------------------------------------------------*/
2152 geniCodeArray2Ptr (operand * op)
2154 sym_link *optype = operandType (op);
2155 sym_link *opetype = getSpec (optype);
2157 /* set the pointer depending on the storage class */
2158 if ((DCL_TYPE (optype) = PTR_TYPE (SPEC_OCLS (opetype))) == CPOINTER)
2159 DCL_PTR_CONST (optype) = port->mem.code_ro;
2161 /* if the variable was declared a constant */
2162 /* then the pointer points to a constant */
2163 if (IS_CONSTANT (opetype))
2164 DCL_PTR_CONST (optype) = 1;
2166 /* the variable was volatile then pointer to volatile */
2167 if (IS_VOLATILE (opetype))
2168 DCL_PTR_VOLATILE (optype) = 1;
2175 /*-----------------------------------------------------------------*/
2176 /* geniCodeArray - array access */
2177 /*-----------------------------------------------------------------*/
2179 geniCodeArray (operand * left, operand * right,int lvl)
2182 sym_link *ltype = operandType (left);
2186 if (IS_PTR (ltype->next) && left->isaddr)
2188 left = geniCodeRValue (left, FALSE);
2190 return geniCodeDerefPtr (geniCodeAdd (left, right, lvl), lvl);
2193 right = geniCodeMultiply (right,
2194 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
2196 /* we can check for limits here */
2197 if (isOperandLiteral (right) &&
2200 (operandLitValue (right) / getSize (ltype->next)) >= DCL_ELEM (ltype))
2202 werror (E_ARRAY_BOUND);
2203 right = operandFromLit (0);
2206 ic = newiCode ('+', left, right);
2208 IC_RESULT (ic) = newiTempOperand (((IS_PTR (ltype) &&
2209 !IS_AGGREGATE (ltype->next) &&
2210 !IS_PTR (ltype->next))
2211 ? ltype : ltype->next), 0);
2213 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (ltype->next));
2215 return IC_RESULT (ic);
2218 /*-----------------------------------------------------------------*/
2219 /* geniCodeStruct - generates intermediate code for structres */
2220 /*-----------------------------------------------------------------*/
2222 geniCodeStruct (operand * left, operand * right, bool islval)
2225 sym_link *type = operandType (left);
2226 sym_link *etype = getSpec (type);
2228 symbol *element = getStructElement (SPEC_STRUCT (etype),
2229 right->operand.symOperand);
2231 wassert(IS_SYMOP(right));
2233 /* add the offset */
2234 ic = newiCode ('+', left, operandFromLit (element->offset));
2236 IC_RESULT (ic) = newiTempOperand (element->type, 0);
2238 /* preserve the storage & output class of the struct */
2239 /* as well as the volatile attribute */
2240 retype = getSpec (operandType (IC_RESULT (ic)));
2241 SPEC_SCLS (retype) = SPEC_SCLS (etype);
2242 SPEC_OCLS (retype) = SPEC_OCLS (etype);
2243 SPEC_VOLATILE (retype) |= SPEC_VOLATILE (etype);
2245 if (IS_PTR (element->type))
2246 setOperandType (IC_RESULT (ic), aggrToPtr (operandType (IC_RESULT (ic)), TRUE));
2248 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (element->type));
2252 return (islval ? IC_RESULT (ic) : geniCodeRValue (IC_RESULT (ic), TRUE));
2255 /*-----------------------------------------------------------------*/
2256 /* geniCodePostInc - generate int code for Post increment */
2257 /*-----------------------------------------------------------------*/
2259 geniCodePostInc (operand * op)
2263 sym_link *optype = operandType (op);
2265 operand *rv = (IS_ITEMP (op) ?
2266 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2268 sym_link *rvtype = operandType (rv);
2271 /* if this is not an address we have trouble */
2274 werror (E_LVALUE_REQUIRED, "++");
2278 rOp = newiTempOperand (rvtype, 0);
2279 OP_SYMBOL(rOp)->noSpilLoc = 1;
2282 OP_SYMBOL(rv)->noSpilLoc = 1;
2284 geniCodeAssign (rOp, rv, 0);
2286 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2287 if (IS_FLOAT (rvtype))
2288 ic = newiCode ('+', rv, operandFromValue (constFloatVal ("1.0")));
2290 ic = newiCode ('+', rv, operandFromLit (size));
2292 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2295 geniCodeAssign (op, result, 0);
2301 /*-----------------------------------------------------------------*/
2302 /* geniCodePreInc - generate code for preIncrement */
2303 /*-----------------------------------------------------------------*/
2305 geniCodePreInc (operand * op)
2308 sym_link *optype = operandType (op);
2309 operand *rop = (IS_ITEMP (op) ?
2310 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2312 sym_link *roptype = operandType (rop);
2318 werror (E_LVALUE_REQUIRED, "++");
2323 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2324 if (IS_FLOAT (roptype))
2325 ic = newiCode ('+', rop, operandFromValue (constFloatVal ("1.0")));
2327 ic = newiCode ('+', rop, operandFromLit (size));
2328 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2332 return geniCodeAssign (op, result, 0);
2335 /*-----------------------------------------------------------------*/
2336 /* geniCodePostDec - generates code for Post decrement */
2337 /*-----------------------------------------------------------------*/
2339 geniCodePostDec (operand * op)
2343 sym_link *optype = operandType (op);
2345 operand *rv = (IS_ITEMP (op) ?
2346 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2348 sym_link *rvtype = operandType (rv);
2351 /* if this is not an address we have trouble */
2354 werror (E_LVALUE_REQUIRED, "--");
2358 rOp = newiTempOperand (rvtype, 0);
2359 OP_SYMBOL(rOp)->noSpilLoc = 1;
2362 OP_SYMBOL(rv)->noSpilLoc = 1;
2364 geniCodeAssign (rOp, rv, 0);
2366 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2367 if (IS_FLOAT (rvtype))
2368 ic = newiCode ('-', rv, operandFromValue (constFloatVal ("1.0")));
2370 ic = newiCode ('-', rv, operandFromLit (size));
2372 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2375 geniCodeAssign (op, result, 0);
2381 /*-----------------------------------------------------------------*/
2382 /* geniCodePreDec - generate code for pre decrement */
2383 /*-----------------------------------------------------------------*/
2385 geniCodePreDec (operand * op)
2388 sym_link *optype = operandType (op);
2389 operand *rop = (IS_ITEMP (op) ?
2390 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2392 sym_link *roptype = operandType (rop);
2398 werror (E_LVALUE_REQUIRED, "--");
2403 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2404 if (IS_FLOAT (roptype))
2405 ic = newiCode ('-', rop, operandFromValue (constFloatVal ("1.0")));
2407 ic = newiCode ('-', rop, operandFromLit (size));
2408 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2412 return geniCodeAssign (op, result, 0);
2416 /*-----------------------------------------------------------------*/
2417 /* geniCodeBitwise - gen int code for bitWise operators */
2418 /*-----------------------------------------------------------------*/
2420 geniCodeBitwise (operand * left, operand * right,
2421 int oper, sym_link * resType)
2425 left = geniCodeCast (resType, left, TRUE);
2426 right = geniCodeCast (resType, right, TRUE);
2428 ic = newiCode (oper, left, right);
2429 IC_RESULT (ic) = newiTempOperand (resType, 0);
2432 return IC_RESULT (ic);
2435 /*-----------------------------------------------------------------*/
2436 /* geniCodeAddressOf - gens icode for '&' address of operator */
2437 /*-----------------------------------------------------------------*/
2439 geniCodeAddressOf (operand * op)
2443 sym_link *optype = operandType (op);
2444 sym_link *opetype = getSpec (optype);
2446 /* lvalue check already done in decorateType */
2447 /* this must be a lvalue */
2448 /* if (!op->isaddr && !IS_AGGREGATE(optype)) { */
2449 /* werror (E_LVALUE_REQUIRED,"&"); */
2453 p = newLink (DECLARATOR);
2455 /* set the pointer depending on the storage class */
2456 if ((DCL_TYPE (p) = PTR_TYPE (SPEC_OCLS (opetype))) == CPOINTER)
2457 DCL_PTR_CONST (p) = port->mem.code_ro;
2459 /* make sure we preserve the const & volatile */
2460 if (IS_CONSTANT (opetype))
2461 DCL_PTR_CONST (p) = 1;
2463 if (IS_VOLATILE (opetype))
2464 DCL_PTR_VOLATILE (p) = 1;
2466 p->next = copyLinkChain (optype);
2468 /* if already a temp */
2471 setOperandType (op, p);
2476 /* other wise make this of the type coming in */
2477 ic = newiCode (ADDRESS_OF, op, NULL);
2478 IC_RESULT (ic) = newiTempOperand (p, 1);
2479 IC_RESULT (ic)->isaddr = 0;
2481 return IC_RESULT (ic);
2483 /*-----------------------------------------------------------------*/
2484 /* setOClass - sets the output class depending on the pointer type */
2485 /*-----------------------------------------------------------------*/
2487 setOClass (sym_link * ptr, sym_link * spec)
2489 switch (DCL_TYPE (ptr))
2492 SPEC_OCLS (spec) = data;
2496 SPEC_OCLS (spec) = generic;
2500 SPEC_OCLS (spec) = xdata;
2504 SPEC_OCLS (spec) = code;
2508 SPEC_OCLS (spec) = idata;
2512 SPEC_OCLS (spec) = xstack;
2516 SPEC_OCLS (spec) = eeprom;
2525 /*-----------------------------------------------------------------*/
2526 /* geniCodeDerefPtr - dereference pointer with '*' */
2527 /*-----------------------------------------------------------------*/
2529 geniCodeDerefPtr (operand * op,int lvl)
2531 sym_link *rtype, *retype;
2532 sym_link *optype = operandType (op);
2534 /* if this is a pointer then generate the rvalue */
2535 if (IS_PTR (optype))
2537 if (IS_TRUE_SYMOP (op))
2540 op = geniCodeRValue (op, TRUE);
2543 op = geniCodeRValue (op, TRUE);
2546 /* now get rid of the pointer part */
2547 if (isLvaluereq(lvl) && IS_ITEMP (op))
2549 retype = getSpec (rtype = copyLinkChain (optype));
2553 retype = getSpec (rtype = copyLinkChain (optype->next));
2556 /* if this is a pointer then outputclass needs 2b updated */
2557 if (IS_PTR (optype))
2558 setOClass (optype, retype);
2560 op->isGptr = IS_GENPTR (optype);
2563 /* if the pointer was declared as a constant */
2564 /* then we cannot allow assignment to the derefed */
2565 if (IS_PTR_CONST (optype))
2566 SPEC_CONST (retype) = 1;
2569 op->isaddr = (IS_PTR (rtype) ||
2570 IS_STRUCT (rtype) ||
2575 if (!isLvaluereq(lvl))
2576 op = geniCodeRValue (op, TRUE);
2578 setOperandType (op, rtype);
2583 /*-----------------------------------------------------------------*/
2584 /* geniCodeUnaryMinus - does a unary minus of the operand */
2585 /*-----------------------------------------------------------------*/
2587 geniCodeUnaryMinus (operand * op)
2590 sym_link *optype = operandType (op);
2592 if (IS_LITERAL (optype))
2593 return operandFromLit (-floatFromVal (op->operand.valOperand));
2595 ic = newiCode (UNARYMINUS, op, NULL);
2596 IC_RESULT (ic) = newiTempOperand (optype, 0);
2598 return IC_RESULT (ic);
2601 /*-----------------------------------------------------------------*/
2602 /* geniCodeLeftShift - gen i code for left shift */
2603 /*-----------------------------------------------------------------*/
2605 geniCodeLeftShift (operand * left, operand * right)
2609 ic = newiCode (LEFT_OP, left, right);
2610 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2612 return IC_RESULT (ic);
2615 /*-----------------------------------------------------------------*/
2616 /* geniCodeRightShift - gen i code for right shift */
2617 /*-----------------------------------------------------------------*/
2619 geniCodeRightShift (operand * left, operand * right)
2623 ic = newiCode (RIGHT_OP, left, right);
2624 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2626 return IC_RESULT (ic);
2629 /*-----------------------------------------------------------------*/
2630 /* geniCodeLogic- logic code */
2631 /*-----------------------------------------------------------------*/
2633 geniCodeLogic (operand * left, operand * right, int op)
2637 sym_link *rtype = operandType (right);
2638 sym_link *ltype = operandType (left);
2640 /* left is integral type and right is literal then
2641 check if the literal value is within bounds */
2642 if (IS_INTEGRAL (ltype) && IS_VALOP (right) && IS_LITERAL (rtype))
2644 checkConstantRange(ltype,
2645 OP_VALUE(right), "compare operation", 1);
2648 ctype = usualBinaryConversions (&left, &right);
2650 ic = newiCode (op, left, right);
2651 IC_RESULT (ic) = newiTempOperand (newCharLink (), 1);
2653 /* if comparing float
2654 and not a '==' || '!=' || '&&' || '||' (these
2656 if (IS_FLOAT(ctype) &&
2664 return IC_RESULT (ic);
2667 /*-----------------------------------------------------------------*/
2668 /* geniCodeUnary - for a a generic unary operation */
2669 /*-----------------------------------------------------------------*/
2671 geniCodeUnary (operand * op, int oper)
2673 iCode *ic = newiCode (oper, op, NULL);
2675 IC_RESULT (ic) = newiTempOperand (operandType (op), 0);
2677 return IC_RESULT (ic);
2680 /*-----------------------------------------------------------------*/
2681 /* geniCodeConditional - geniCode for '?' ':' operation */
2682 /*-----------------------------------------------------------------*/
2684 geniCodeConditional (ast * tree,int lvl)
2687 symbol *falseLabel = newiTempLabel (NULL);
2688 symbol *exitLabel = newiTempLabel (NULL);
2689 operand *cond = ast2iCode (tree->left,lvl+1);
2690 operand *true, *false, *result;
2692 ic = newiCodeCondition (geniCodeRValue (cond, FALSE),
2696 true = ast2iCode (tree->right->left,lvl+1);
2698 /* move the value to a new Operand */
2699 result = newiTempOperand (tree->right->ftype, 0);
2700 geniCodeAssign (result, geniCodeRValue (true, FALSE), 0);
2702 /* generate an unconditional goto */
2703 geniCodeGoto (exitLabel);
2705 /* now for the right side */
2706 geniCodeLabel (falseLabel);
2708 false = ast2iCode (tree->right->right,lvl+1);
2709 geniCodeAssign (result, geniCodeRValue (false, FALSE), 0);
2711 /* create the exit label */
2712 geniCodeLabel (exitLabel);
2717 /*-----------------------------------------------------------------*/
2718 /* geniCodeAssign - generate code for assignment */
2719 /*-----------------------------------------------------------------*/
2721 geniCodeAssign (operand * left, operand * right, int nosupdate)
2724 sym_link *ltype = operandType (left);
2725 sym_link *rtype = operandType (right);
2727 if (!left->isaddr && !IS_ITEMP (left))
2729 werror (E_LVALUE_REQUIRED, "assignment");
2733 /* left is integral type and right is literal then
2734 check if the literal value is within bounds */
2735 if (IS_INTEGRAL (ltype) && right->type == VALUE && IS_LITERAL (rtype))
2737 checkConstantRange(ltype,
2738 OP_VALUE(right), "= operation", 0);
2741 /* if the left & right type don't exactly match */
2742 /* if pointer set then make sure the check is
2743 done with the type & not the pointer */
2744 /* then cast rights type to left */
2746 /* first check the type for pointer assignement */
2747 if (left->isaddr && IS_PTR (ltype) && IS_ITEMP (left) &&
2748 compareType (ltype, rtype) <= 0)
2750 if (compareType (ltype->next, rtype) < 0)
2751 right = geniCodeCast (ltype->next, right, TRUE);
2753 else if (compareType (ltype, rtype) < 0)
2754 right = geniCodeCast (ltype, right, TRUE);
2756 /* if left is a true symbol & ! volatile
2757 create an assignment to temporary for
2758 the right & then assign this temporary
2759 to the symbol this is SSA . isn't it simple
2760 and folks have published mountains of paper on it */
2761 if (IS_TRUE_SYMOP (left) &&
2762 !isOperandVolatile (left, FALSE) &&
2763 isOperandGlobal (left))
2767 if (IS_TRUE_SYMOP (right))
2768 sym = OP_SYMBOL (right);
2769 ic = newiCode ('=', NULL, right);
2770 IC_RESULT (ic) = right = newiTempOperand (ltype, 0);
2771 SPIL_LOC (right) = sym;
2775 ic = newiCode ('=', NULL, right);
2776 IC_RESULT (ic) = left;
2779 /* if left isgptr flag is set then support
2780 routine will be required */
2784 ic->nosupdate = nosupdate;
2788 /*-----------------------------------------------------------------*/
2789 /* geniCodeSEParms - generate code for side effecting fcalls */
2790 /*-----------------------------------------------------------------*/
2792 geniCodeSEParms (ast * parms,int lvl)
2797 if (parms->type == EX_OP && parms->opval.op == PARAM)
2799 geniCodeSEParms (parms->left,lvl);
2800 geniCodeSEParms (parms->right,lvl);
2804 /* hack don't like this but too lazy to think of
2806 if (IS_ADDRESS_OF_OP (parms))
2807 parms->left->lvalue = 1;
2809 if (IS_CAST_OP (parms) &&
2810 IS_PTR (parms->ftype) &&
2811 IS_ADDRESS_OF_OP (parms->right))
2812 parms->right->left->lvalue = 1;
2814 parms->opval.oprnd =
2815 geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
2817 parms->type = EX_OPERAND;
2818 AST_ARGREG(parms) = parms->etype ? SPEC_ARGREG(parms->etype) :
2819 SPEC_ARGREG(parms->ftype);
2822 /*-----------------------------------------------------------------*/
2823 /* geniCodeParms - generates parameters */
2824 /*-----------------------------------------------------------------*/
2826 geniCodeParms (ast * parms, value *argVals, int *stack,
2827 sym_link * fetype, symbol * func,int lvl)
2835 if (argVals==NULL) {
2837 argVals=FUNC_ARGS(func->type);
2840 /* if this is a param node then do the left & right */
2841 if (parms->type == EX_OP && parms->opval.op == PARAM)
2843 argVals=geniCodeParms (parms->left, argVals, stack, fetype, func,lvl);
2844 argVals=geniCodeParms (parms->right, argVals, stack, fetype, func,lvl);
2848 /* get the parameter value */
2849 if (parms->type == EX_OPERAND)
2850 pval = parms->opval.oprnd;
2853 /* maybe this else should go away ?? */
2854 /* hack don't like this but too lazy to think of
2856 if (IS_ADDRESS_OF_OP (parms))
2857 parms->left->lvalue = 1;
2859 if (IS_CAST_OP (parms) &&
2860 IS_PTR (parms->ftype) &&
2861 IS_ADDRESS_OF_OP (parms->right))
2862 parms->right->left->lvalue = 1;
2864 pval = geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
2867 /* if register parm then make it a send */
2868 if ((IS_REGPARM (parms->etype) && !IFFUNC_HASVARARGS(func->type)) ||
2869 IFFUNC_ISBUILTIN(func->type))
2871 ic = newiCode (SEND, pval, NULL);
2872 ic->argreg = SPEC_ARGREG(parms->etype);
2873 ic->builtinSEND = FUNC_ISBUILTIN(func->type);
2878 /* now decide whether to push or assign */
2879 if (!(options.stackAuto || IFFUNC_ISREENT (func->type)))
2883 operand *top = operandFromSymbol (argVals->sym);
2884 /* clear useDef and other bitVectors */
2885 OP_USES(top)=OP_DEFS(top)=OP_SYMBOL(top)->clashes = NULL;
2886 geniCodeAssign (top, pval, 1);
2890 sym_link *p = operandType (pval);
2892 ic = newiCode (IPUSH, pval, NULL);
2894 /* update the stack adjustment */
2895 *stack += getSize (IS_AGGREGATE (p) ? aggrToPtr (p, FALSE) : p);
2900 argVals=argVals->next;
2904 /*-----------------------------------------------------------------*/
2905 /* geniCodeCall - generates temp code for calling */
2906 /*-----------------------------------------------------------------*/
2908 geniCodeCall (operand * left, ast * parms,int lvl)
2912 sym_link *type, *etype;
2915 if (!IS_FUNC(OP_SYMBOL(left)->type) &&
2916 !IS_CODEPTR(OP_SYMBOL(left)->type)) {
2917 werror (E_FUNCTION_EXPECTED);
2921 /* take care of parameters with side-effecting
2922 function calls in them, this is required to take care
2923 of overlaying function parameters */
2924 geniCodeSEParms (parms,lvl);
2926 /* first the parameters */
2927 geniCodeParms (parms, NULL, &stack, getSpec (operandType (left)), OP_SYMBOL (left),lvl);
2929 /* now call : if symbol then pcall */
2930 if (IS_OP_POINTER (left) || IS_ITEMP(left)) {
2931 ic = newiCode (PCALL, left, NULL);
2933 ic = newiCode (CALL, left, NULL);
2936 type = copyLinkChain (operandType (left)->next);
2937 etype = getSpec (type);
2938 SPEC_EXTR (etype) = 0;
2939 IC_RESULT (ic) = result = newiTempOperand (type, 1);
2943 /* stack adjustment after call */
2944 ic->parmBytes = stack;
2949 /*-----------------------------------------------------------------*/
2950 /* geniCodeReceive - generate intermediate code for "receive" */
2951 /*-----------------------------------------------------------------*/
2953 geniCodeReceive (value * args)
2955 /* for all arguments that are passed in registers */
2959 if (IS_REGPARM (args->etype))
2961 operand *opr = operandFromValue (args);
2963 symbol *sym = OP_SYMBOL (opr);
2966 /* we will use it after all optimizations
2967 and before liveRange calculation */
2968 if (!sym->addrtaken && !IS_VOLATILE (sym->etype))
2971 if (IN_FARSPACE (SPEC_OCLS (sym->etype)) &&
2972 options.stackAuto == 0 &&
2973 (!(options.model == MODEL_FLAT24)) )
2978 opl = newiTempOperand (args->type, 0);
2980 sym->reqv->key = sym->key;
2981 OP_SYMBOL (sym->reqv)->key = sym->key;
2982 OP_SYMBOL (sym->reqv)->isreqv = 1;
2983 OP_SYMBOL (sym->reqv)->islocal = 0;
2984 SPIL_LOC (sym->reqv) = sym;
2988 ic = newiCode (RECEIVE, NULL, NULL);
2989 ic->argreg = SPEC_ARGREG(args->etype);
2991 currFunc->recvSize = getSize (sym->type);
2994 IC_RESULT (ic) = opr;
3002 /*-----------------------------------------------------------------*/
3003 /* geniCodeFunctionBody - create the function body */
3004 /*-----------------------------------------------------------------*/
3006 geniCodeFunctionBody (ast * tree,int lvl)
3013 /* reset the auto generation */
3019 func = ast2iCode (tree->left,lvl+1);
3020 fetype = getSpec (operandType (func));
3022 savelineno = lineno;
3023 lineno = OP_SYMBOL (func)->lineDef;
3024 /* create an entry label */
3025 geniCodeLabel (entryLabel);
3026 lineno = savelineno;
3028 /* create a proc icode */
3029 ic = newiCode (FUNCTION, func, NULL);
3030 lineno=ic->lineno = OP_SYMBOL (func)->lineDef;
3034 /* for all parameters that are passed
3035 on registers add a "receive" */
3036 geniCodeReceive (tree->values.args);
3038 /* generate code for the body */
3039 ast2iCode (tree->right,lvl+1);
3041 /* create a label for return */
3042 geniCodeLabel (returnLabel);
3044 /* now generate the end proc */
3045 ic = newiCode (ENDFUNCTION, func, NULL);
3050 /*-----------------------------------------------------------------*/
3051 /* geniCodeReturn - gen icode for 'return' statement */
3052 /*-----------------------------------------------------------------*/
3054 geniCodeReturn (operand * op)
3058 /* if the operand is present force an rvalue */
3060 op = geniCodeRValue (op, FALSE);
3062 ic = newiCode (RETURN, op, NULL);
3066 /*-----------------------------------------------------------------*/
3067 /* geniCodeIfx - generates code for extended if statement */
3068 /*-----------------------------------------------------------------*/
3070 geniCodeIfx (ast * tree,int lvl)
3073 operand *condition = ast2iCode (tree->left,lvl+1);
3076 /* if condition is null then exit */
3080 condition = geniCodeRValue (condition, FALSE);
3082 cetype = getSpec (operandType (condition));
3083 /* if the condition is a literal */
3084 if (IS_LITERAL (cetype))
3086 if (floatFromVal (condition->operand.valOperand))
3088 if (tree->trueLabel)
3089 geniCodeGoto (tree->trueLabel);
3095 if (tree->falseLabel)
3096 geniCodeGoto (tree->falseLabel);
3103 if (tree->trueLabel)
3105 ic = newiCodeCondition (condition,
3110 if (tree->falseLabel)
3111 geniCodeGoto (tree->falseLabel);
3115 ic = newiCodeCondition (condition,
3122 ast2iCode (tree->right,lvl+1);
3125 /*-----------------------------------------------------------------*/
3126 /* geniCodeJumpTable - tries to create a jump table for switch */
3127 /*-----------------------------------------------------------------*/
3129 geniCodeJumpTable (operand * cond, value * caseVals, ast * tree)
3131 int min = 0, max = 0, t, cnt = 0;
3138 if (!tree || !caseVals)
3141 /* the criteria for creating a jump table is */
3142 /* all integer numbers between the maximum & minimum must */
3143 /* be present , the maximum value should not exceed 255 */
3144 min = max = (int) floatFromVal (vch = caseVals);
3145 SNPRINTF (buffer, sizeof(buffer),
3147 tree->values.switchVals.swNum,
3149 addSet (&labels, newiTempLabel (buffer));
3151 /* if there is only one case value then no need */
3152 if (!(vch = vch->next))
3157 if (((t = (int) floatFromVal (vch)) - max) != 1)
3159 SNPRINTF (buffer, sizeof(buffer),
3161 tree->values.switchVals.swNum,
3163 addSet (&labels, newiTempLabel (buffer));
3169 /* if the number of case statements <= 2 then */
3170 /* it is not economical to create the jump table */
3171 /* since two compares are needed for boundary conditions */
3172 if ((!optimize.noJTabBoundary && cnt <= 2) || max > (255 / 3))
3175 if (tree->values.switchVals.swDefault)
3177 SNPRINTF (buffer, sizeof(buffer), "_default_%d", tree->values.switchVals.swNum);
3181 SNPRINTF (buffer, sizeof(buffer), "_swBrk_%d", tree->values.switchVals.swNum);
3185 falseLabel = newiTempLabel (buffer);
3187 /* so we can create a jumptable */
3188 /* first we rule out the boundary conditions */
3189 /* if only optimization says so */
3190 if (!optimize.noJTabBoundary)
3192 sym_link *cetype = getSpec (operandType (cond));
3193 /* no need to check the lower bound if
3194 the condition is unsigned & minimum value is zero */
3195 if (!(min == 0 && SPEC_USIGN (cetype)))
3197 boundary = geniCodeLogic (cond, operandFromLit (min), '<');
3198 ic = newiCodeCondition (boundary, falseLabel, NULL);
3202 /* now for upper bounds */
3203 boundary = geniCodeLogic (cond, operandFromLit (max), '>');
3204 ic = newiCodeCondition (boundary, falseLabel, NULL);
3208 /* if the min is not zero then we no make it zero */
3211 cond = geniCodeSubtract (cond, operandFromLit (min));
3212 setOperandType (cond, UCHARTYPE);
3215 /* now create the jumptable */
3216 ic = newiCode (JUMPTABLE, NULL, NULL);
3217 IC_JTCOND (ic) = cond;
3218 IC_JTLABELS (ic) = labels;
3223 /*-----------------------------------------------------------------*/
3224 /* geniCodeSwitch - changes a switch to a if statement */
3225 /*-----------------------------------------------------------------*/
3227 geniCodeSwitch (ast * tree,int lvl)
3230 operand *cond = geniCodeRValue (ast2iCode (tree->left,lvl+1), FALSE);
3231 value *caseVals = tree->values.switchVals.swVals;
3232 symbol *trueLabel, *falseLabel;
3234 /* if we can make this a jump table */
3235 if (geniCodeJumpTable (cond, caseVals, tree))
3236 goto jumpTable; /* no need for the comparison */
3238 /* for the cases defined do */
3242 operand *compare = geniCodeLogic (cond,
3243 operandFromValue (caseVals),
3246 SNPRINTF (buffer, sizeof(buffer), "_case_%d_%d",
3247 tree->values.switchVals.swNum,
3248 (int) floatFromVal (caseVals));
3249 trueLabel = newiTempLabel (buffer);
3251 ic = newiCodeCondition (compare, trueLabel, NULL);
3253 caseVals = caseVals->next;
3258 /* if default is present then goto break else break */
3259 if (tree->values.switchVals.swDefault)
3261 SNPRINTF (buffer, sizeof(buffer), "_default_%d", tree->values.switchVals.swNum);
3265 SNPRINTF (buffer, sizeof(buffer), "_swBrk_%d", tree->values.switchVals.swNum);
3268 falseLabel = newiTempLabel (buffer);
3269 geniCodeGoto (falseLabel);
3272 ast2iCode (tree->right,lvl+1);
3275 /*-----------------------------------------------------------------*/
3276 /* geniCodeInline - intermediate code for inline assembler */
3277 /*-----------------------------------------------------------------*/
3279 geniCodeInline (ast * tree)
3283 ic = newiCode (INLINEASM, NULL, NULL);
3284 IC_INLINE (ic) = tree->values.inlineasm;
3288 /*-----------------------------------------------------------------*/
3289 /* geniCodeArrayInit - intermediate code for array initializer */
3290 /*-----------------------------------------------------------------*/
3292 geniCodeArrayInit (ast * tree, operand *array)
3296 if (!getenv("TRY_THE_NEW_INITIALIZER")) {
3297 ic = newiCode (ARRAYINIT, array, NULL);
3298 IC_ARRAYILIST (ic) = tree->values.constlist;
3300 operand *left=newOperand(), *right=newOperand();
3301 left->type=right->type=SYMBOL;
3302 OP_SYMBOL(left)=AST_SYMBOL(tree->left);
3303 OP_SYMBOL(right)=AST_SYMBOL(tree->right);
3304 ic = newiCode (ARRAYINIT, left, right);
3309 /*-----------------------------------------------------------------*/
3310 /* Stuff used in ast2iCode to modify geniCodeDerefPtr in some */
3311 /* particular case. Ie : assigning or dereferencing array or ptr */
3312 /*-----------------------------------------------------------------*/
3313 set * lvaluereqSet = NULL;
3314 typedef struct lvalItem
3321 /*-----------------------------------------------------------------*/
3322 /* addLvaluereq - add a flag for lvalreq for current ast level */
3323 /*-----------------------------------------------------------------*/
3324 void addLvaluereq(int lvl)
3326 lvalItem * lpItem = (lvalItem *)Safe_alloc ( sizeof (lvalItem));
3329 addSetHead(&lvaluereqSet,lpItem);
3332 /*-----------------------------------------------------------------*/
3333 /* delLvaluereq - del a flag for lvalreq for current ast level */
3334 /*-----------------------------------------------------------------*/
3338 lpItem = getSet(&lvaluereqSet);
3339 if(lpItem) Safe_free(lpItem);
3341 /*-----------------------------------------------------------------*/
3342 /* clearLvaluereq - clear lvalreq flag */
3343 /*-----------------------------------------------------------------*/
3344 void clearLvaluereq()
3347 lpItem = peekSet(lvaluereqSet);
3348 if(lpItem) lpItem->req = 0;
3350 /*-----------------------------------------------------------------*/
3351 /* getLvaluereq - get the last lvalreq level */
3352 /*-----------------------------------------------------------------*/
3353 int getLvaluereqLvl()
3356 lpItem = peekSet(lvaluereqSet);
3357 if(lpItem) return lpItem->lvl;
3360 /*-----------------------------------------------------------------*/
3361 /* isLvaluereq - is lvalreq valid for this level ? */
3362 /*-----------------------------------------------------------------*/
3363 int isLvaluereq(int lvl)
3366 lpItem = peekSet(lvaluereqSet);
3367 if(lpItem) return ((lpItem->req)&&(lvl <= (lpItem->lvl+1)));
3371 /*-----------------------------------------------------------------*/
3372 /* ast2iCode - creates an icodeList from an ast */
3373 /*-----------------------------------------------------------------*/
3375 ast2iCode (ast * tree,int lvl)
3377 operand *left = NULL;
3378 operand *right = NULL;
3382 /* set the global variables for filename & line number */
3384 filename = tree->filename;
3386 lineno = tree->lineno;
3388 block = tree->block;
3390 scopeLevel = tree->level;
3392 if (tree->type == EX_VALUE)
3393 return operandFromValue (tree->opval.val);
3395 if (tree->type == EX_LINK)
3396 return operandFromLink (tree->opval.lnk);
3398 /* if we find a nullop */
3399 if (tree->type == EX_OP &&
3400 (tree->opval.op == NULLOP ||
3401 tree->opval.op == BLOCK))
3403 ast2iCode (tree->left,lvl+1);
3404 ast2iCode (tree->right,lvl+1);
3408 /* special cases for not evaluating */
3409 if (tree->opval.op != ':' &&
3410 tree->opval.op != '?' &&
3411 tree->opval.op != CALL &&
3412 tree->opval.op != IFX &&
3413 tree->opval.op != LABEL &&
3414 tree->opval.op != GOTO &&
3415 tree->opval.op != SWITCH &&
3416 tree->opval.op != FUNCTION &&
3417 tree->opval.op != INLINEASM)
3420 if (IS_ASSIGN_OP (tree->opval.op) ||
3421 IS_DEREF_OP (tree) ||
3422 (tree->opval.op == '&' && !tree->right) ||
3423 tree->opval.op == PTR_OP)
3426 if ((IS_ARRAY_OP (tree->left) && IS_ARRAY_OP (tree->left->left)) ||
3427 (IS_DEREF_OP (tree) && IS_ARRAY_OP (tree->left)))
3430 left = operandFromAst (tree->left,lvl);
3432 if (IS_DEREF_OP (tree) && IS_DEREF_OP (tree->left))
3433 left = geniCodeRValue (left, TRUE);
3437 left = operandFromAst (tree->left,lvl);
3439 if (tree->opval.op == INC_OP ||
3440 tree->opval.op == DEC_OP)
3443 right = operandFromAst (tree->right,lvl);
3448 right = operandFromAst (tree->right,lvl);
3452 /* now depending on the type of operand */
3453 /* this will be a biggy */
3454 switch (tree->opval.op)
3457 case '[': /* array operation */
3459 //sym_link *ltype = operandType (left);
3460 //left = geniCodeRValue (left, IS_PTR (ltype->next) ? TRUE : FALSE);
3461 left = geniCodeRValue (left, FALSE);
3462 right = geniCodeRValue (right, TRUE);
3465 return geniCodeArray (left, right,lvl);
3467 case '.': /* structure dereference */
3468 if (IS_PTR (operandType (left)))
3469 left = geniCodeRValue (left, TRUE);
3471 left = geniCodeRValue (left, FALSE);
3473 return geniCodeStruct (left, right, tree->lvalue);
3475 case PTR_OP: /* structure pointer dereference */
3478 pType = operandType (left);
3479 left = geniCodeRValue (left, TRUE);
3481 setOClass (pType, getSpec (operandType (left)));
3484 return geniCodeStruct (left, right, tree->lvalue);
3486 case INC_OP: /* increment operator */
3488 return geniCodePostInc (left);
3490 return geniCodePreInc (right);
3492 case DEC_OP: /* decrement operator */
3494 return geniCodePostDec (left);
3496 return geniCodePreDec (right);
3498 case '&': /* bitwise and or address of operator */
3500 { /* this is a bitwise operator */
3501 left = geniCodeRValue (left, FALSE);
3502 right = geniCodeRValue (right, FALSE);
3503 return geniCodeBitwise (left, right, BITWISEAND, tree->ftype);
3506 return geniCodeAddressOf (left);
3508 case '|': /* bitwise or & xor */
3510 return geniCodeBitwise (geniCodeRValue (left, FALSE),
3511 geniCodeRValue (right, FALSE),
3516 return geniCodeDivision (geniCodeRValue (left, FALSE),
3517 geniCodeRValue (right, FALSE));
3520 return geniCodeModulus (geniCodeRValue (left, FALSE),
3521 geniCodeRValue (right, FALSE));
3524 return geniCodeMultiply (geniCodeRValue (left, FALSE),
3525 geniCodeRValue (right, FALSE),IS_INT(tree->ftype));
3527 return geniCodeDerefPtr (geniCodeRValue (left, FALSE),lvl);
3531 return geniCodeSubtract (geniCodeRValue (left, FALSE),
3532 geniCodeRValue (right, FALSE));
3534 return geniCodeUnaryMinus (geniCodeRValue (left, FALSE));
3538 return geniCodeAdd (geniCodeRValue (left, FALSE),
3539 geniCodeRValue (right, FALSE),lvl);
3541 return geniCodeRValue (left, FALSE); /* unary '+' has no meaning */
3544 return geniCodeLeftShift (geniCodeRValue (left, FALSE),
3545 geniCodeRValue (right, FALSE));
3548 return geniCodeRightShift (geniCodeRValue (left, FALSE),
3549 geniCodeRValue (right, FALSE));
3551 return geniCodeCast (operandType (left),
3552 geniCodeRValue (right, FALSE), FALSE);
3558 return geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3562 operand *op = geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3563 setOperandType (op, UCHARTYPE);
3574 return geniCodeLogic (geniCodeRValue (left, FALSE),
3575 geniCodeRValue (right, FALSE),
3578 return geniCodeConditional (tree,lvl);
3581 return operandFromLit (getSize (tree->right->ftype));
3585 sym_link *rtype = operandType (right);
3586 sym_link *ltype = operandType (left);
3587 if (IS_PTR (rtype) && IS_ITEMP (right)
3588 && right->isaddr && compareType (rtype->next, ltype) == 1)
3589 right = geniCodeRValue (right, TRUE);
3591 right = geniCodeRValue (right, FALSE);
3593 geniCodeAssign (left, right, 0);
3598 geniCodeAssign (left,
3599 geniCodeMultiply (geniCodeRValue (operandFromOperand (left),
3601 geniCodeRValue (right, FALSE),FALSE), 0);
3605 geniCodeAssign (left,
3606 geniCodeDivision (geniCodeRValue (operandFromOperand (left),
3608 geniCodeRValue (right, FALSE)), 0);
3611 geniCodeAssign (left,
3612 geniCodeModulus (geniCodeRValue (operandFromOperand (left),
3614 geniCodeRValue (right, FALSE)), 0);
3617 sym_link *rtype = operandType (right);
3618 sym_link *ltype = operandType (left);
3619 if (IS_PTR (rtype) && IS_ITEMP (right)
3620 && right->isaddr && compareType (rtype->next, ltype) == 1)
3621 right = geniCodeRValue (right, TRUE);
3623 right = geniCodeRValue (right, FALSE);
3626 return geniCodeAssign (left,
3627 geniCodeAdd (geniCodeRValue (operandFromOperand (left),
3633 sym_link *rtype = operandType (right);
3634 sym_link *ltype = operandType (left);
3635 if (IS_PTR (rtype) && IS_ITEMP (right)
3636 && right->isaddr && compareType (rtype->next, ltype) == 1)
3638 right = geniCodeRValue (right, TRUE);
3642 right = geniCodeRValue (right, FALSE);
3645 geniCodeAssign (left,
3646 geniCodeSubtract (geniCodeRValue (operandFromOperand (left),
3652 geniCodeAssign (left,
3653 geniCodeLeftShift (geniCodeRValue (operandFromOperand (left)
3655 geniCodeRValue (right, FALSE)), 0);
3658 geniCodeAssign (left,
3659 geniCodeRightShift (geniCodeRValue (operandFromOperand (left)
3661 geniCodeRValue (right, FALSE)), 0);
3664 geniCodeAssign (left,
3665 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3667 geniCodeRValue (right, FALSE),
3669 operandType (left)), 0);
3672 geniCodeAssign (left,
3673 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3675 geniCodeRValue (right, FALSE),
3677 operandType (left)), 0);
3680 geniCodeAssign (left,
3681 geniCodeBitwise (geniCodeRValue (operandFromOperand (left)
3683 geniCodeRValue (right, FALSE),
3685 operandType (left)), 0);
3687 return geniCodeRValue (right, FALSE);
3690 return geniCodeCall (ast2iCode (tree->left,lvl+1),
3693 geniCodeLabel (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3694 return ast2iCode (tree->right,lvl+1);
3697 geniCodeGoto (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3698 return ast2iCode (tree->right,lvl+1);
3701 geniCodeFunctionBody (tree,lvl);
3705 geniCodeReturn (right);
3709 geniCodeIfx (tree,lvl);
3713 geniCodeSwitch (tree,lvl);
3717 geniCodeInline (tree);
3721 geniCodeArrayInit(tree, ast2iCode (tree->left,lvl+1));
3728 /*-----------------------------------------------------------------*/
3729 /* reverseICChain - gets from the list and creates a linkedlist */
3730 /*-----------------------------------------------------------------*/
3737 while ((loop = getSet (&iCodeChain)))
3749 /*-----------------------------------------------------------------*/
3750 /* iCodeFromAst - given an ast will convert it to iCode */
3751 /*-----------------------------------------------------------------*/
3753 iCodeFromAst (ast * tree)
3755 returnLabel = newiTempLabel ("_return");
3756 entryLabel = newiTempLabel ("_entry");
3758 return reverseiCChain ();
3761 static const char *opTypeToStr(OPTYPE op)
3765 case SYMBOL: return "symbol";
3766 case VALUE: return "value";
3767 case TYPE: return "type";
3769 return "undefined type";
3773 operand *validateOpType(operand *op,
3780 if (op && op->type == type)
3785 "Internal error: validateOpType failed in %s(%s) @ %s:%u:"
3786 " expected %s, got %s\n",
3787 macro, args, file, line,
3788 opTypeToStr(type), op ? opTypeToStr(op->type) : "null op");
3790 return op; // never reached, makes compiler happy.