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, int pedantic) {
131 char message[132]="";
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;
182 sprintf (message, "for %s %s in %s",
183 SPEC_USIGN(ltype) ? "unsigned" : "signed",
184 nounName(ltype), msg);
185 werror (W_CONST_RANGE, message);
192 /*-----------------------------------------------------------------*/
193 /* operandName - returns the name of the operand */
194 /*-----------------------------------------------------------------*/
196 printOperand (operand * op, FILE * file)
213 opetype = getSpec (operandType (op));
214 if (SPEC_NOUN (opetype) == V_FLOAT)
215 fprintf (file, "%g {", SPEC_CVAL (opetype).v_float);
217 fprintf (file, "0x%x {", (int) floatFromVal (op->operand.valOperand));
218 printTypeChain (operandType (op), file);
225 fprintf (file, "%s [k%d lr%d:%d so:%d]{ ia%d re%d rm%d nos%d ru%d}", /*{ar%d rm%d ru%d p%d a%d u%d i%d au%d k%d ks%d}" , */
226 (OP_SYMBOL (op)->rname[0] ? OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name),
228 OP_LIVEFROM (op), OP_LIVETO (op),
229 OP_SYMBOL (op)->stack,
230 op->isaddr, OP_SYMBOL (op)->isreqv, OP_SYMBOL (op)->remat,OP_SYMBOL(op)->noSpilLoc,
231 OP_SYMBOL(op)->ruonly
235 printTypeChain (operandType (op), file);
236 if (SPIL_LOC (op) && IS_ITEMP (op))
237 fprintf (file, "}{ sir@ %s", SPIL_LOC (op)->rname);
242 /* if assigned to registers */
243 if (OP_SYMBOL (op)->nRegs)
245 if (OP_SYMBOL (op)->isspilt)
247 if (!OP_SYMBOL (op)->remat)
248 if (OP_SYMBOL (op)->usl.spillLoc)
249 fprintf (file, "[%s]", (OP_SYMBOL (op)->usl.spillLoc->rname[0] ?
250 OP_SYMBOL (op)->usl.spillLoc->rname :
251 OP_SYMBOL (op)->usl.spillLoc->name));
253 fprintf (file, "[err]");
255 fprintf (file, "[remat]");
261 for (i = 0; i < OP_SYMBOL (op)->nRegs; i++)
262 fprintf (file, "%s ", port->getRegName (OP_SYMBOL (op)->regs[i]));
267 fprintf (file, "%s", (OP_SYMBOL (op)->rname[0] ?
268 OP_SYMBOL (op)->rname : OP_SYMBOL (op)->name));
269 /* if assigned to registers */
270 if (OP_SYMBOL (op)->nRegs && !OP_SYMBOL (op)->isspilt)
274 for (i = 0; i < OP_SYMBOL (op)->nRegs; i++)
275 fprintf (file, "%s ", (OP_SYMBOL (op)->regs[i] ?
276 OP_SYMBOL (op)->regs[i]->name :
285 printTypeChain (op->operand.typeOperand, file);
291 fprintf (file, "\n");
296 /*-----------------------------------------------------------------*/
297 /* print functions */
298 /*-----------------------------------------------------------------*/
299 PRINTFUNC (picGetValueAtAddr)
302 printOperand (IC_RESULT (ic), of);
305 printOperand (IC_LEFT (ic), of);
311 PRINTFUNC (picSetValueAtAddr)
315 printOperand (IC_LEFT (ic), of);
316 fprintf (of, "] = ");
317 printOperand (IC_RIGHT (ic), of);
321 PRINTFUNC (picAddrOf)
324 printOperand (IC_RESULT (ic), of);
325 if (IS_ITEMP (IC_LEFT (ic)))
328 fprintf (of, " = &[");
329 printOperand (IC_LEFT (ic), of);
332 if (IS_ITEMP (IC_LEFT (ic)))
333 fprintf (of, " offsetAdd ");
336 printOperand (IC_RIGHT (ic), of);
338 if (IS_ITEMP (IC_LEFT (ic)))
344 PRINTFUNC (picJumpTable)
349 fprintf (of, "%s\t", s);
350 printOperand (IC_JTCOND (ic), of);
352 for (sym = setFirstItem (IC_JTLABELS (ic)); sym;
353 sym = setNextItem (IC_JTLABELS (ic)))
354 fprintf (of, "\t\t\t%s\n", sym->name);
357 PRINTFUNC (picGeneric)
360 printOperand (IC_RESULT (ic), of);
362 printOperand (IC_LEFT (ic), of);
363 fprintf (of, " %s ", s);
364 printOperand (IC_RIGHT (ic), of);
368 PRINTFUNC (picGenericOne)
373 printOperand (IC_RESULT (ic), of);
379 fprintf (of, "%s ", s);
380 printOperand (IC_LEFT (ic), of);
383 if (!IC_RESULT (ic) && !IC_LEFT (ic))
392 printOperand (IC_RESULT (ic), of);
394 printOperand (IC_LEFT (ic), of);
395 printOperand (IC_RIGHT (ic), of);
400 PRINTFUNC (picAssign)
404 if (IC_RESULT (ic)->isaddr && IS_ITEMP (IC_RESULT (ic)))
407 printOperand (IC_RESULT (ic), of);
409 if (IC_RESULT (ic)->isaddr && IS_ITEMP (IC_RESULT (ic)))
412 fprintf (of, " %s ", s);
413 printOperand (IC_RIGHT (ic), of);
420 fprintf (of, " %s($%d) :\n", IC_LABEL (ic)->name, IC_LABEL (ic)->key);
426 fprintf (of, " goto %s($%d)\n", IC_LABEL (ic)->name, IC_LABEL (ic)->key);
433 printOperand (IC_COND (ic), of);
436 fprintf (of, " == 0 goto %s($%d)\n", IC_FALSE (ic)->name, IC_FALSE (ic)->key);
439 fprintf (of, " != 0 goto %s($%d)\n", IC_TRUE (ic)->name, IC_TRUE (ic)->key);
441 fprintf (of, "\tzzgoto %s\n", IC_FALSE (ic)->name);
445 PRINTFUNC (picInline)
447 fprintf (of, "%s", IC_INLINE (ic));
450 PRINTFUNC (picReceive)
452 printOperand (IC_RESULT (ic), of);
453 fprintf (of, " = %s ", s);
454 printOperand (IC_LEFT (ic), of);
458 /*-----------------------------------------------------------------*/
459 /* piCode - prints one iCode */
460 /*-----------------------------------------------------------------*/
462 piCode (void *item, FILE * of)
470 icTab = getTableEntry (ic->op);
471 fprintf (stdout, "%s(%d:%d:%d:%d:%d)\t",
472 ic->filename, ic->lineno,
473 ic->seq, ic->key, ic->depth, ic->supportRtn);
474 icTab->iCodePrint (of, ic, icTab->printName);
480 printiCChain(ic,stdout);
482 /*-----------------------------------------------------------------*/
483 /* printiCChain - prints intermediate code for humans */
484 /*-----------------------------------------------------------------*/
486 printiCChain (iCode * icChain, FILE * of)
493 for (loop = icChain; loop; loop = loop->next)
495 if ((icTab = getTableEntry (loop->op)))
497 fprintf (of, "%s(%d:%d:%d:%d:%d)\t",
498 loop->filename, loop->lineno,
499 loop->seq, loop->key, loop->depth, loop->supportRtn);
501 icTab->iCodePrint (of, loop, icTab->printName);
507 /*-----------------------------------------------------------------*/
508 /* newOperand - allocate, init & return a new iCode */
509 /*-----------------------------------------------------------------*/
515 op = Safe_alloc ( sizeof (operand));
521 /*-----------------------------------------------------------------*/
522 /* newiCode - create and return a new iCode entry initialised */
523 /*-----------------------------------------------------------------*/
525 newiCode (int op, operand * left, operand * right)
529 ic = Safe_alloc ( sizeof (iCode));
532 ic->filename = filename;
534 ic->level = scopeLevel;
536 ic->key = iCodeKey++;
538 IC_RIGHT (ic) = right;
543 /*-----------------------------------------------------------------*/
544 /* newiCode for conditional statements */
545 /*-----------------------------------------------------------------*/
547 newiCodeCondition (operand * condition,
553 if (IS_VOID(operandType(condition))) {
554 werror(E_VOID_VALUE_USED);
557 ic = newiCode (IFX, NULL, NULL);
558 IC_COND (ic) = condition;
559 IC_TRUE (ic) = trueLabel;
560 IC_FALSE (ic) = falseLabel;
564 /*-----------------------------------------------------------------*/
565 /* newiCodeLabelGoto - unconditional goto statement| label stmnt */
566 /*-----------------------------------------------------------------*/
568 newiCodeLabelGoto (int op, symbol * label)
572 ic = newiCode (op, NULL, NULL);
574 ic->argLabel.label = label;
576 IC_RIGHT (ic) = NULL;
577 IC_RESULT (ic) = NULL;
581 /*-----------------------------------------------------------------*/
582 /* newiTemp - allocate & return a newItemp Variable */
583 /*-----------------------------------------------------------------*/
590 sprintf (buffer, "%s", s);
592 sprintf (buffer, "iTemp%d", iTempNum++);
593 itmp = newSymbol (buffer, 1);
594 strcpy (itmp->rname, itmp->name);
600 /*-----------------------------------------------------------------*/
601 /* newiTempLabel - creates a temp variable label */
602 /*-----------------------------------------------------------------*/
604 newiTempLabel (char *s)
608 /* check if this alredy exists */
609 if (s && (itmplbl = findSym (LabelTab, NULL, s)))
613 itmplbl = newSymbol (s, 1);
616 sprintf (buffer, "iTempLbl%d", iTempLblNum++);
617 itmplbl = newSymbol (buffer, 1);
622 itmplbl->key = labelKey++;
623 addSym (LabelTab, itmplbl, itmplbl->name, 0, 0, 0);
627 /*-----------------------------------------------------------------*/
628 /* newiTempPreheaderLabel - creates a new preheader label */
629 /*-----------------------------------------------------------------*/
631 newiTempPreheaderLabel ()
635 sprintf (buffer, "preHeaderLbl%d", iTempLblNum++);
636 itmplbl = newSymbol (buffer, 1);
640 itmplbl->key = labelKey++;
641 addSym (LabelTab, itmplbl, itmplbl->name, 0, 0, 0);
646 /*-----------------------------------------------------------------*/
647 /* initiCode - initialises some iCode related stuff */
648 /*-----------------------------------------------------------------*/
655 /*-----------------------------------------------------------------*/
656 /* copyiCode - make a copy of the iCode given */
657 /*-----------------------------------------------------------------*/
659 copyiCode (iCode * ic)
661 iCode *nic = newiCode (ic->op, NULL, NULL);
663 nic->lineno = ic->lineno;
664 nic->filename = ic->filename;
665 nic->block = ic->block;
666 nic->level = ic->level;
667 nic->parmBytes = ic->parmBytes;
669 /* deal with the special cases first */
673 IC_COND (nic) = operandFromOperand (IC_COND (ic));
674 IC_TRUE (nic) = IC_TRUE (ic);
675 IC_FALSE (nic) = IC_FALSE (ic);
679 IC_JTCOND (nic) = operandFromOperand (IC_JTCOND (ic));
680 IC_JTLABELS (nic) = IC_JTLABELS (ic);
685 IC_RESULT (nic) = operandFromOperand (IC_RESULT (ic));
686 IC_LEFT (nic) = operandFromOperand (IC_LEFT (ic));
690 IC_INLINE (nic) = IC_INLINE (ic);
694 IC_ARRAYILIST(nic) = IC_ARRAYILIST(ic);
698 IC_RESULT (nic) = operandFromOperand (IC_RESULT (ic));
699 IC_LEFT (nic) = operandFromOperand (IC_LEFT (ic));
700 IC_RIGHT (nic) = operandFromOperand (IC_RIGHT (ic));
706 /*-----------------------------------------------------------------*/
707 /* getTableEntry - gets the table entry for the given operator */
708 /*-----------------------------------------------------------------*/
710 getTableEntry (int oper)
714 for (i = 0; i < (sizeof (codeTable) / sizeof (iCodeTable)); i++)
715 if (oper == codeTable[i].icode)
716 return &codeTable[i];
721 /*-----------------------------------------------------------------*/
722 /* newiTempOperand - new intermediate temp operand */
723 /*-----------------------------------------------------------------*/
725 newiTempOperand (sym_link * type, char throwType)
728 operand *op = newOperand ();
732 itmp = newiTemp (NULL);
734 etype = getSpec (type);
736 if (IS_LITERAL (etype))
739 /* copy the type information */
741 itmp->etype = getSpec (itmp->type = (throwType ? type :
742 copyLinkChain (type)));
743 if (IS_LITERAL (itmp->etype))
745 SPEC_SCLS (itmp->etype) = S_REGISTER;
746 SPEC_OCLS (itmp->etype) = reg;
749 op->operand.symOperand = itmp;
750 op->key = itmp->key = ++operandKey;
754 /*-----------------------------------------------------------------*/
755 /* operandType - returns the type chain for an operand */
756 /*-----------------------------------------------------------------*/
758 operandType (operand * op)
760 /* depending on type of operand */
765 return op->operand.valOperand->type;
768 return op->operand.symOperand->type;
771 return op->operand.typeOperand;
773 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
774 " operand type not known ");
775 assert (0); /* should never come here */
776 /* Just to keep the compiler happy */
777 return (sym_link *) 0;
781 /*-----------------------------------------------------------------*/
782 /* isParamterToCall - will return 1 if op is a parameter to args */
783 /*-----------------------------------------------------------------*/
785 isParameterToCall (value * args, operand * op)
792 isSymbolEqual (op->operand.symOperand, tval->sym))
799 /*-----------------------------------------------------------------*/
800 /* isOperandGlobal - return 1 if operand is a global variable */
801 /*-----------------------------------------------------------------*/
803 isOperandGlobal (operand * op)
811 if (op->type == SYMBOL &&
812 (op->operand.symOperand->level == 0 ||
813 IS_STATIC (op->operand.symOperand->etype) ||
814 IS_EXTERN (op->operand.symOperand->etype))
821 /*-----------------------------------------------------------------*/
822 /* isOperandVolatile - return 1 if the operand is volatile */
823 /*-----------------------------------------------------------------*/
825 isOperandVolatile (operand * op, bool chkTemp)
830 if (IS_ITEMP (op) && !chkTemp)
833 opetype = getSpec (optype = operandType (op));
835 if (IS_PTR (optype) && DCL_PTR_VOLATILE (optype))
838 if (IS_VOLATILE (opetype))
843 /*-----------------------------------------------------------------*/
844 /* isOperandLiteral - returns 1 if an operand contains a literal */
845 /*-----------------------------------------------------------------*/
847 isOperandLiteral (operand * op)
854 opetype = getSpec (operandType (op));
856 if (IS_LITERAL (opetype))
861 /*-----------------------------------------------------------------*/
862 /* isOperandInFarSpace - will return true if operand is in farSpace */
863 /*-----------------------------------------------------------------*/
865 isOperandInFarSpace (operand * op)
875 if (!IS_TRUE_SYMOP (op))
878 etype = SPIL_LOC (op)->etype;
884 etype = getSpec (operandType (op));
886 return (IN_FARSPACE (SPEC_OCLS (etype)) ? TRUE : FALSE);
889 /*-----------------------------------------------------------------*/
890 /* isOperandOnStack - will return true if operand is on stack */
891 /*-----------------------------------------------------------------*/
893 isOperandOnStack (operand * op)
903 etype = getSpec (operandType (op));
905 return ((IN_STACK (etype)) ? TRUE : FALSE);
908 /*-----------------------------------------------------------------*/
909 /* operandLitValue - literal value of an operand */
910 /*-----------------------------------------------------------------*/
912 operandLitValue (operand * op)
914 assert (isOperandLiteral (op));
916 return floatFromVal (op->operand.valOperand);
919 /*-----------------------------------------------------------------*/
920 /* operandOperation - perforoms operations on operands */
921 /*-----------------------------------------------------------------*/
923 operandOperation (operand * left, operand * right,
924 int op, sym_link * type)
926 sym_link *let , *ret=NULL;
927 operand *retval = (operand *) 0;
929 assert (isOperandLiteral (left));
930 let = getSpec(operandType(left));
932 assert (isOperandLiteral (right));
933 ret = getSpec(operandType(left));
939 retval = operandFromValue (valCastLiteral (type,
940 operandLitValue (left) +
941 operandLitValue (right)));
944 retval = operandFromValue (valCastLiteral (type,
945 operandLitValue (left) -
946 operandLitValue (right)));
949 retval = operandFromValue (valCastLiteral (type,
950 operandLitValue (left) *
951 operandLitValue (right)));
954 if ((unsigned long) operandLitValue (right) == 0)
956 werror (E_DIVIDE_BY_ZERO);
961 retval = operandFromValue (valCastLiteral (type,
962 operandLitValue (left) /
963 operandLitValue (right)));
966 if ((unsigned long) operandLitValue (right) == 0) {
967 werror (E_DIVIDE_BY_ZERO);
971 retval = operandFromLit ((SPEC_USIGN(let) ?
972 (unsigned long) operandLitValue (left) :
973 (long) operandLitValue (left)) %
975 (unsigned long) operandLitValue (right) :
976 (long) operandLitValue (right)));
980 retval = operandFromLit ((SPEC_USIGN(let) ?
981 (unsigned long) operandLitValue (left) :
982 (long) operandLitValue (left)) <<
984 (unsigned long) operandLitValue (right) :
985 (long) operandLitValue (right)));
988 retval = operandFromLit ((SPEC_USIGN(let) ?
989 (unsigned long) operandLitValue (left) :
990 (long) operandLitValue (left)) >>
992 (unsigned long) operandLitValue (right) :
993 (long) operandLitValue (right)));
996 retval = operandFromLit (operandLitValue (left) ==
997 operandLitValue (right));
1000 retval = operandFromLit (operandLitValue (left) <
1001 operandLitValue (right));
1004 retval = operandFromLit (operandLitValue (left) <=
1005 operandLitValue (right));
1008 retval = operandFromLit (operandLitValue (left) !=
1009 operandLitValue (right));
1012 retval = operandFromLit (operandLitValue (left) >
1013 operandLitValue (right));
1016 retval = operandFromLit (operandLitValue (left) >=
1017 operandLitValue (right));
1020 retval = operandFromLit ((long)operandLitValue(left) &
1021 (long)operandLitValue(right));
1024 retval = operandFromLit ((long)operandLitValue (left) |
1025 (long)operandLitValue (right));
1028 retval = operandFromLit ((long)operandLitValue (left) ^
1029 (long)operandLitValue (right));
1032 retval = operandFromLit (operandLitValue (left) &&
1033 operandLitValue (right));
1036 retval = operandFromLit (operandLitValue (left) ||
1037 operandLitValue (right));
1041 long i = (long) operandLitValue (left);
1043 retval = operandFromLit ((i >> (getSize (operandType (left)) * 8 - 1)) |
1049 long i = (long) operandLitValue (left);
1051 retval = operandFromLit ((i << (getSize (operandType (left)) * 8 - 1)) |
1057 retval = operandFromLit (-1 * operandLitValue (left));
1061 retval = operandFromLit (~((long) operandLitValue (left)));
1065 retval = operandFromLit (!operandLitValue (left));
1069 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1070 " operandOperation invalid operator ");
1078 /*-----------------------------------------------------------------*/
1079 /* isOperandEqual - compares two operand & return 1 if they r = */
1080 /*-----------------------------------------------------------------*/
1082 isOperandEqual (operand * left, operand * right)
1084 /* if the pointers are equal then they are equal */
1088 /* if either of them null then false */
1089 if (!left || !right)
1092 if (left->type != right->type)
1095 if (IS_SYMOP (left) && IS_SYMOP (right))
1096 return left->key == right->key;
1098 /* if types are the same */
1102 return isSymbolEqual (left->operand.symOperand,
1103 right->operand.symOperand);
1105 return (floatFromVal (left->operand.valOperand) ==
1106 floatFromVal (right->operand.valOperand));
1108 if (compareType (left->operand.typeOperand,
1109 right->operand.typeOperand) == 1)
1116 /*-------------------------------------------------------------------*/
1117 /* isiCodeEqual - compares two iCodes are equal, returns true if yes */
1118 /*-------------------------------------------------------------------*/
1120 isiCodeEqual (iCode * left, iCode * right)
1122 /* if the same pointer */
1126 /* if either of them null */
1127 if (!left || !right)
1130 /* if operand are the same */
1131 if (left->op == right->op)
1134 /* compare all the elements depending on type */
1135 if (left->op != IFX)
1137 if (!isOperandEqual (IC_LEFT (left), IC_LEFT (right)))
1139 if (!isOperandEqual (IC_RIGHT (left), IC_RIGHT (right)))
1145 if (!isOperandEqual (IC_COND (left), IC_COND (right)))
1147 if (!isSymbolEqual (IC_TRUE (left), IC_TRUE (right)))
1149 if (!isSymbolEqual (IC_FALSE (left), IC_FALSE (right)))
1158 /*-----------------------------------------------------------------*/
1159 /* newiTempFromOp - create a temp Operand with same attributes */
1160 /*-----------------------------------------------------------------*/
1162 newiTempFromOp (operand * op)
1172 nop = newiTempOperand (operandType (op), TRUE);
1173 nop->isaddr = op->isaddr;
1174 nop->isvolatile = op->isvolatile;
1175 nop->isGlobal = op->isGlobal;
1176 nop->isLiteral = op->isLiteral;
1177 nop->usesDefs = op->usesDefs;
1178 nop->isParm = op->isParm;
1182 /*-----------------------------------------------------------------*/
1183 /* operand from operand - creates an operand holder for the type */
1184 /*-----------------------------------------------------------------*/
1186 operandFromOperand (operand * op)
1192 nop = newOperand ();
1193 nop->type = op->type;
1194 nop->isaddr = op->isaddr;
1196 nop->isvolatile = op->isvolatile;
1197 nop->isGlobal = op->isGlobal;
1198 nop->isLiteral = op->isLiteral;
1199 nop->usesDefs = op->usesDefs;
1200 nop->isParm = op->isParm;
1205 nop->operand.symOperand = op->operand.symOperand;
1208 nop->operand.valOperand = op->operand.valOperand;
1211 nop->operand.typeOperand = op->operand.typeOperand;
1218 /*-----------------------------------------------------------------*/
1219 /* opFromOpWithDU - makes a copy of the operand and DU chains */
1220 /*-----------------------------------------------------------------*/
1222 opFromOpWithDU (operand * op, bitVect * defs, bitVect * uses)
1224 operand *nop = operandFromOperand (op);
1226 if (nop->type == SYMBOL)
1228 OP_SYMBOL (nop)->defs = bitVectCopy (defs);
1229 OP_SYMBOL (nop)->uses = bitVectCopy (uses);
1235 /*-----------------------------------------------------------------*/
1236 /* operandFromSymbol - creates an operand from a symbol */
1237 /*-----------------------------------------------------------------*/
1239 operandFromSymbol (symbol * sym)
1244 /* if the symbol's type is a literal */
1245 /* then it is an enumerator type */
1246 if (IS_LITERAL (sym->etype) && SPEC_ENUM (sym->etype))
1247 return operandFromValue (valFromType (sym->etype));
1250 sym->key = ++operandKey;
1252 /* if this an implicit variable, means struct/union */
1253 /* member so just return it */
1254 if (sym->implicit || IS_FUNC (sym->type))
1258 op->operand.symOperand = sym;
1260 op->isvolatile = isOperandVolatile (op, TRUE);
1261 op->isGlobal = isOperandGlobal (op);
1265 /* under the following conditions create a
1266 register equivalent for a local symbol */
1267 if (sym->level && sym->etype && SPEC_OCLS (sym->etype) &&
1268 (IN_FARSPACE (SPEC_OCLS (sym->etype)) &&
1269 (!(options.model == MODEL_FLAT24)) ) &&
1270 options.stackAuto == 0)
1273 if (!IS_AGGREGATE (sym->type) && /* not an aggregate */
1274 !IS_FUNC (sym->type) && /* not a function */
1275 !sym->_isparm && /* not a parameter */
1276 sym->level && /* is a local variable */
1277 !sym->addrtaken && /* whose address has not been taken */
1278 !sym->reqv && /* does not already have a reg equivalence */
1279 !IS_VOLATILE (sym->etype) && /* not declared as volatile */
1280 !IS_STATIC (sym->etype) && /* and not declared static */
1281 !sym->islbl && /* not a label */
1282 ok && /* farspace check */
1283 !IS_BITVAR (sym->etype) /* not a bit variable */
1287 /* we will use it after all optimizations
1288 and before liveRange calculation */
1289 sym->reqv = newiTempOperand (sym->type, 0);
1290 sym->reqv->key = sym->key;
1291 OP_SYMBOL (sym->reqv)->key = sym->key;
1292 OP_SYMBOL (sym->reqv)->isreqv = 1;
1293 OP_SYMBOL (sym->reqv)->islocal = 1;
1294 OP_SYMBOL (sym->reqv)->onStack = sym->onStack;
1295 SPIL_LOC (sym->reqv) = sym;
1298 if (!IS_AGGREGATE (sym->type))
1302 op->operand.symOperand = sym;
1305 op->isvolatile = isOperandVolatile (op, TRUE);
1306 op->isGlobal = isOperandGlobal (op);
1307 op->isPtr = IS_PTR (operandType (op));
1308 op->isParm = sym->_isparm;
1313 /* itemp = &[_symbol] */
1315 ic = newiCode (ADDRESS_OF, newOperand (), NULL);
1316 IC_LEFT (ic)->type = SYMBOL;
1317 IC_LEFT (ic)->operand.symOperand = sym;
1318 IC_LEFT (ic)->key = sym->key;
1319 (IC_LEFT (ic))->isvolatile = isOperandVolatile (IC_LEFT (ic), TRUE);
1320 (IC_LEFT (ic))->isGlobal = isOperandGlobal (IC_LEFT (ic));
1321 IC_LEFT (ic)->isPtr = IS_PTR (operandType (IC_LEFT (ic)));
1324 IC_RESULT (ic) = newiTempOperand (sym->type, 0);
1325 if (IS_ARRAY (sym->type))
1327 IC_RESULT (ic) = geniCodeArray2Ptr (IC_RESULT (ic));
1328 IC_RESULT (ic)->isaddr = 0;
1331 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (sym->type));
1335 return IC_RESULT (ic);
1338 /*-----------------------------------------------------------------*/
1339 /* operandFromValue - creates an operand from value */
1340 /*-----------------------------------------------------------------*/
1342 operandFromValue (value * val)
1346 /* if this is a symbol then do the symbol thing */
1348 return operandFromSymbol (val->sym);
1350 /* this is not a symbol */
1353 op->operand.valOperand = val;
1354 op->isLiteral = isOperandLiteral (op);
1358 /*-----------------------------------------------------------------*/
1359 /* operandFromLink - operand from typeChain */
1360 /*-----------------------------------------------------------------*/
1362 operandFromLink (sym_link * type)
1366 /* operand from sym_link */
1372 op->operand.typeOperand = copyLinkChain (type);
1376 /*-----------------------------------------------------------------*/
1377 /* operandFromLit - makes an operand from a literal value */
1378 /*-----------------------------------------------------------------*/
1380 operandFromLit (double i)
1382 return operandFromValue (valueFromLit (i));
1385 /*-----------------------------------------------------------------*/
1386 /* operandFromAst - creates an operand from an ast */
1387 /*-----------------------------------------------------------------*/
1389 operandFromAst (ast * tree,int lvl)
1395 /* depending on type do */
1399 return ast2iCode (tree,lvl+1);
1403 return operandFromValue (tree->opval.val);
1407 return operandFromLink (tree->opval.lnk);
1411 /* Just to keep the comiler happy */
1412 return (operand *) 0;
1415 /*-----------------------------------------------------------------*/
1416 /* setOperandType - sets the operand's type to the given type */
1417 /*-----------------------------------------------------------------*/
1419 setOperandType (operand * op, sym_link * type)
1421 /* depending on the type of operand */
1426 op->operand.valOperand->etype =
1427 getSpec (op->operand.valOperand->type =
1428 copyLinkChain (type));
1432 if (op->operand.symOperand->isitmp)
1433 op->operand.symOperand->etype =
1434 getSpec (op->operand.symOperand->type =
1435 copyLinkChain (type));
1437 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1438 "attempt to modify type of source");
1442 op->operand.typeOperand = copyLinkChain (type);
1447 /*-----------------------------------------------------------------*/
1448 /* Get size in byte of ptr need to access an array */
1449 /*-----------------------------------------------------------------*/
1451 getArraySizePtr (operand * op)
1453 sym_link *ltype = operandType(op);
1457 int size = getSize(ltype);
1458 return(IS_GENPTR(ltype)?(size-1):size);
1463 sym_link *letype = getSpec(ltype);
1464 switch (PTR_TYPE (SPEC_OCLS (letype)))
1476 return (GPTRSIZE-1);
1485 /*-----------------------------------------------------------------*/
1486 /* perform "usual unary conversions" */
1487 /*-----------------------------------------------------------------*/
1489 usualUnaryConversions (operand * op)
1491 if (IS_INTEGRAL (operandType (op)))
1493 if (getSize (operandType (op)) < (unsigned int) INTSIZE)
1496 return geniCodeCast (INTTYPE, op, TRUE);
1502 /*-----------------------------------------------------------------*/
1503 /* perform "usual binary conversions" */
1504 /*-----------------------------------------------------------------*/
1506 usualBinaryConversions (operand ** op1, operand ** op2)
1509 sym_link *rtype = operandType (*op2);
1510 sym_link *ltype = operandType (*op1);
1512 ctype = computeType (ltype, rtype);
1513 *op1 = geniCodeCast (ctype, *op1, TRUE);
1514 *op2 = geniCodeCast (ctype, *op2, TRUE);
1519 /*-----------------------------------------------------------------*/
1520 /* geniCodeValueAtAddress - generate intermeditate code for value */
1522 /*-----------------------------------------------------------------*/
1524 geniCodeRValue (operand * op, bool force)
1527 sym_link *type = operandType (op);
1528 sym_link *etype = getSpec (type);
1530 /* if this is an array & already */
1531 /* an address then return this */
1532 if (IS_AGGREGATE (type) ||
1533 (IS_PTR (type) && !force && !op->isaddr))
1534 return operandFromOperand (op);
1536 /* if this is not an address then must be */
1537 /* rvalue already so return this one */
1541 /* if this is not a temp symbol then */
1542 if (!IS_ITEMP (op) &&
1544 !IN_FARSPACE (SPEC_OCLS (etype)))
1546 op = operandFromOperand (op);
1551 if (IS_SPEC (type) &&
1552 IS_TRUE_SYMOP (op) &&
1553 (!IN_FARSPACE (SPEC_OCLS (etype)) ||
1554 /* TARGET_IS_DS390)) */
1555 (options.model == MODEL_FLAT24) ))
1557 op = operandFromOperand (op);
1562 ic = newiCode (GET_VALUE_AT_ADDRESS, op, NULL);
1563 if (IS_PTR (type) && op->isaddr && force)
1566 type = copyLinkChain (type);
1568 IC_RESULT (ic) = newiTempOperand (type, 1);
1569 IC_RESULT (ic)->isaddr = 0;
1571 /* ic->supportRtn = ((IS_GENPTR(type) | op->isGptr) & op->isaddr); */
1575 return IC_RESULT (ic);
1578 /*-----------------------------------------------------------------*/
1579 /* geniCodeCast - changes the value from one type to another */
1580 /*-----------------------------------------------------------------*/
1582 geniCodeCast (sym_link * type, operand * op, bool implicit)
1586 sym_link *opetype = getSpec (optype = operandType (op));
1590 /* one of them has size zero then error */
1591 if (IS_VOID (optype))
1593 werror (E_CAST_ZERO);
1597 /* if the operand is already the desired type then do nothing */
1598 if (compareType (type, optype) == 1)
1601 /* if this is a literal then just change the type & return */
1602 if (IS_LITERAL (opetype) && op->type == VALUE && !IS_PTR (type) && !IS_PTR (optype))
1603 return operandFromValue (valCastLiteral (type,
1604 operandLitValue (op)));
1606 /* if casting to/from pointers, do some checking */
1607 if (IS_PTR(type)) { // to a pointer
1608 if (!IS_PTR(optype) && !IS_FUNC(optype) && !IS_AGGREGATE(optype)) { // from a non pointer
1609 if (IS_INTEGRAL(optype)) {
1610 // maybe this is NULL, than it's ok.
1611 if (!(IS_LITERAL(optype) && (SPEC_CVAL(optype).v_ulong ==0))) {
1612 if (!TARGET_IS_Z80 && !TARGET_IS_GBZ80 && IS_GENPTR(type)) {
1613 // no way to set the storage
1614 if (IS_LITERAL(optype)) {
1615 werror(E_LITERAL_GENERIC);
1618 werror(E_NONPTR2_GENPTR);
1621 } else if (implicit) {
1622 werror(W_INTEGRAL2PTR_NOCAST);
1627 // shouldn't do that with float, array or structure unless to void
1628 if (!IS_VOID(getSpec(type)) &&
1629 !(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1630 werror(E_INCOMPAT_TYPES);
1634 } else { // from a pointer to a pointer
1635 if (!TARGET_IS_Z80 && !TARGET_IS_GBZ80) {
1636 // if not a pointer to a function
1637 if (!(IS_CODEPTR(type) && IS_FUNC(type->next) && IS_FUNC(optype))) {
1638 if (implicit) { // if not to generic, they have to match
1639 if ((!IS_GENPTR(type) && (DCL_TYPE(optype) != DCL_TYPE(type)))) {
1640 werror(E_INCOMPAT_PTYPES);
1647 } else { // to a non pointer
1648 if (IS_PTR(optype)) { // from a pointer
1649 if (implicit) { // sneaky
1650 if (IS_INTEGRAL(type)) {
1651 werror(W_PTR2INTEGRAL_NOCAST);
1653 } else { // shouldn't do that with float, array or structure
1654 werror(E_INCOMPAT_TYPES);
1661 printFromToType (optype, type);
1664 /* if they are the same size create an assignment */
1665 if (getSize (type) == getSize (optype) &&
1666 !IS_BITFIELD (type) &&
1668 !IS_FLOAT (optype) &&
1669 ((IS_SPEC (type) && IS_SPEC (optype)) ||
1670 (!IS_SPEC (type) && !IS_SPEC (optype))))
1673 ic = newiCode ('=', NULL, op);
1674 IC_RESULT (ic) = newiTempOperand (type, 0);
1675 SPIL_LOC (IC_RESULT (ic)) =
1676 (IS_TRUE_SYMOP (op) ? OP_SYMBOL (op) : NULL);
1677 IC_RESULT (ic)->isaddr = 0;
1681 ic = newiCode (CAST, operandFromLink (type),
1682 geniCodeRValue (op, FALSE));
1684 IC_RESULT (ic) = newiTempOperand (type, 0);
1687 /* preserve the storage class & output class */
1688 /* of the original variable */
1689 restype = getSpec (operandType (IC_RESULT (ic)));
1690 SPEC_SCLS (restype) = SPEC_SCLS (opetype);
1691 SPEC_OCLS (restype) = SPEC_OCLS (opetype);
1694 return IC_RESULT (ic);
1697 /*-----------------------------------------------------------------*/
1698 /* geniCodeLabel - will create a Label */
1699 /*-----------------------------------------------------------------*/
1701 geniCodeLabel (symbol * label)
1705 ic = newiCodeLabelGoto (LABEL, label);
1709 /*-----------------------------------------------------------------*/
1710 /* geniCodeGoto - will create a Goto */
1711 /*-----------------------------------------------------------------*/
1713 geniCodeGoto (symbol * label)
1717 ic = newiCodeLabelGoto (GOTO, label);
1721 /*-----------------------------------------------------------------*/
1722 /* geniCodeMultiply - gen intermediate code for multiplication */
1723 /*-----------------------------------------------------------------*/
1725 geniCodeMultiply (operand * left, operand * right,int resultIsInt)
1732 /* if they are both literal then we know the result */
1733 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1734 return operandFromValue (valMult (left->operand.valOperand,
1735 right->operand.valOperand));
1737 if (IS_LITERAL(retype)) {
1738 p2 = powof2 ((unsigned long) floatFromVal (right->operand.valOperand));
1741 resType = usualBinaryConversions (&left, &right);
1743 rtype = operandType (right);
1744 retype = getSpec (rtype);
1745 ltype = operandType (left);
1746 letype = getSpec (ltype);
1750 SPEC_NOUN(getSpec(resType))=V_INT;
1753 /* if the right is a literal & power of 2 */
1754 /* then make it a left shift */
1755 /* code generated for 1 byte * 1 byte literal = 2 bytes result is more
1756 efficient in most cases than 2 bytes result = 2 bytes << literal
1757 if port has 1 byte muldiv */
1758 if (p2 && !IS_FLOAT (letype) &&
1759 !((resultIsInt) && (getSize (resType) != getSize (ltype)) &&
1760 (port->support.muldiv == 1)))
1762 if ((resultIsInt) && (getSize (resType) != getSize (ltype)))
1764 /* LEFT_OP need same size for left and result, */
1765 left = geniCodeCast (resType, left, TRUE);
1766 ltype = operandType (left);
1768 ic = newiCode (LEFT_OP, left, operandFromLit (p2)); /* left shift */
1772 ic = newiCode ('*', left, right); /* normal multiplication */
1773 /* if the size left or right > 1 then support routine */
1774 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1778 IC_RESULT (ic) = newiTempOperand (resType, 1);
1781 return IC_RESULT (ic);
1784 /*-----------------------------------------------------------------*/
1785 /* geniCodeDivision - gen intermediate code for division */
1786 /*-----------------------------------------------------------------*/
1788 geniCodeDivision (operand * left, operand * right)
1793 sym_link *rtype = operandType (right);
1794 sym_link *retype = getSpec (rtype);
1795 sym_link *ltype = operandType (left);
1796 sym_link *letype = getSpec (ltype);
1798 resType = usualBinaryConversions (&left, &right);
1800 /* if the right is a literal & power of 2 */
1801 /* then make it a right shift */
1802 if (IS_LITERAL (retype) &&
1803 !IS_FLOAT (letype) &&
1804 (p2 = powof2 ((unsigned long)
1805 floatFromVal (right->operand.valOperand)))) {
1806 ic = newiCode (RIGHT_OP, left, operandFromLit (p2)); /* right shift */
1810 ic = newiCode ('/', left, right); /* normal division */
1811 /* if the size left or right > 1 then support routine */
1812 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1815 IC_RESULT (ic) = newiTempOperand (resType, 0);
1818 return IC_RESULT (ic);
1820 /*-----------------------------------------------------------------*/
1821 /* geniCodeModulus - gen intermediate code for modulus */
1822 /*-----------------------------------------------------------------*/
1824 geniCodeModulus (operand * left, operand * right)
1830 /* if they are both literal then we know the result */
1831 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1832 return operandFromValue (valMod (left->operand.valOperand,
1833 right->operand.valOperand));
1835 resType = usualBinaryConversions (&left, &right);
1837 /* now they are the same size */
1838 ic = newiCode ('%', left, right);
1840 /* if the size left or right > 1 then support routine */
1841 if (getSize (ltype) > 1 || getSize (rtype) > 1)
1843 IC_RESULT (ic) = newiTempOperand (resType, 0);
1846 return IC_RESULT (ic);
1849 /*-----------------------------------------------------------------*/
1850 /* geniCodePtrPtrSubtract - subtracts pointer from pointer */
1851 /*-----------------------------------------------------------------*/
1853 geniCodePtrPtrSubtract (operand * left, operand * right)
1859 /* if they are both literals then */
1860 if (IS_LITERAL (letype) && IS_LITERAL (retype))
1862 result = operandFromValue (valMinus (left->operand.valOperand,
1863 right->operand.valOperand));
1867 ic = newiCode ('-', left, right);
1869 IC_RESULT (ic) = result = newiTempOperand (newIntLink (), 1);
1873 return geniCodeDivision (result,
1874 operandFromLit (getSize (ltype->next)));
1877 /*-----------------------------------------------------------------*/
1878 /* geniCodeSubtract - generates code for subtraction */
1879 /*-----------------------------------------------------------------*/
1881 geniCodeSubtract (operand * left, operand * right)
1888 /* if they both pointers then */
1889 if ((IS_PTR (ltype) || IS_ARRAY (ltype)) &&
1890 (IS_PTR (rtype) || IS_ARRAY (rtype)))
1891 return geniCodePtrPtrSubtract (left, right);
1893 /* if they are both literal then we know the result */
1894 if (IS_LITERAL (letype) && IS_LITERAL (retype)
1895 && left->isLiteral && right->isLiteral)
1896 return operandFromValue (valMinus (left->operand.valOperand,
1897 right->operand.valOperand));
1899 /* if left is an array or pointer */
1900 if (IS_PTR (ltype) || IS_ARRAY (ltype))
1902 isarray = left->isaddr;
1903 right = geniCodeMultiply (right,
1904 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
1905 resType = copyLinkChain (IS_ARRAY (ltype) ? ltype->next : ltype);
1908 { /* make them the same size */
1909 resType = usualBinaryConversions (&left, &right);
1912 ic = newiCode ('-', left, right);
1914 IC_RESULT (ic) = newiTempOperand (resType, 1);
1915 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
1917 /* if left or right is a float */
1918 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
1922 return IC_RESULT (ic);
1925 /*-----------------------------------------------------------------*/
1926 /* geniCodeAdd - generates iCode for addition */
1927 /*-----------------------------------------------------------------*/
1929 geniCodeAdd (operand * left, operand * right,int lvl)
1937 /* if left is an array then array access */
1938 if (IS_ARRAY (ltype))
1939 return geniCodeArray (left, right,lvl);
1941 /* if the right side is LITERAL zero */
1942 /* return the left side */
1943 if (IS_LITERAL (retype) && right->isLiteral && !floatFromVal (valFromType (retype)))
1946 /* if left is literal zero return right */
1947 if (IS_LITERAL (letype) && left->isLiteral && !floatFromVal (valFromType (letype)))
1950 /* if left is an array or pointer then size */
1953 isarray = left->isaddr;
1954 // there is no need to multiply with 1
1955 if (getSize(ltype->next)!=1) {
1956 size = operandFromLit (getSize (ltype->next));
1957 right = geniCodeMultiply (right, size, (getArraySizePtr(left) >= INTSIZE));
1959 resType = copyLinkChain (ltype);
1962 { /* make them the same size */
1963 resType = usualBinaryConversions (&left, &right);
1966 /* if they are both literals then we know */
1967 if (IS_LITERAL (letype) && IS_LITERAL (retype)
1968 && left->isLiteral && right->isLiteral)
1969 return operandFromValue (valPlus (valFromType (letype),
1970 valFromType (retype)));
1972 ic = newiCode ('+', left, right);
1974 IC_RESULT (ic) = newiTempOperand (resType, 1);
1975 IC_RESULT (ic)->isaddr = (isarray ? 1 : 0);
1977 /* if left or right is a float then support
1979 if (IS_FLOAT (ltype) || IS_FLOAT (rtype))
1984 return IC_RESULT (ic);
1988 /*-----------------------------------------------------------------*/
1989 /* aggrToPtr - changes an aggregate to pointer to an aggregate */
1990 /*-----------------------------------------------------------------*/
1992 aggrToPtr (sym_link * type, bool force)
1998 if (IS_PTR (type) && !force)
2001 etype = getSpec (type);
2005 /* if the output class is generic */
2006 if ((DCL_TYPE (ptype) = PTR_TYPE (SPEC_OCLS (etype))) == CPOINTER)
2007 DCL_PTR_CONST (ptype) = port->mem.code_ro;
2009 /* if the variable was declared a constant */
2010 /* then the pointer points to a constant */
2011 if (IS_CONSTANT (etype))
2012 DCL_PTR_CONST (ptype) = 1;
2014 /* the variable was volatile then pointer to volatile */
2015 if (IS_VOLATILE (etype))
2016 DCL_PTR_VOLATILE (ptype) = 1;
2020 /*-----------------------------------------------------------------*/
2021 /* geniCodeArray2Ptr - array to pointer */
2022 /*-----------------------------------------------------------------*/
2024 geniCodeArray2Ptr (operand * op)
2026 sym_link *optype = operandType (op);
2027 sym_link *opetype = getSpec (optype);
2029 /* set the pointer depending on the storage class */
2030 if ((DCL_TYPE (optype) = PTR_TYPE (SPEC_OCLS (opetype))) == CPOINTER)
2031 DCL_PTR_CONST (optype) = port->mem.code_ro;
2034 /* if the variable was declared a constant */
2035 /* then the pointer points to a constant */
2036 if (IS_CONSTANT (opetype))
2037 DCL_PTR_CONST (optype) = 1;
2039 /* the variable was volatile then pointer to volatile */
2040 if (IS_VOLATILE (opetype))
2041 DCL_PTR_VOLATILE (optype) = 1;
2047 /*-----------------------------------------------------------------*/
2048 /* geniCodeArray - array access */
2049 /*-----------------------------------------------------------------*/
2051 geniCodeArray (operand * left, operand * right,int lvl)
2054 sym_link *ltype = operandType (left);
2058 if (IS_PTR (ltype->next) && left->isaddr)
2060 left = geniCodeRValue (left, FALSE);
2062 return geniCodeDerefPtr (geniCodeAdd (left, right,lvl),lvl);
2065 right = geniCodeMultiply (right,
2066 operandFromLit (getSize (ltype->next)), (getArraySizePtr(left) >= INTSIZE));
2068 /* we can check for limits here */
2069 if (isOperandLiteral (right) &&
2072 (operandLitValue (right) / getSize (ltype->next)) >= DCL_ELEM (ltype))
2074 werror (E_ARRAY_BOUND);
2075 right = operandFromLit (0);
2078 ic = newiCode ('+', left, right);
2080 IC_RESULT (ic) = newiTempOperand (((IS_PTR (ltype) &&
2081 !IS_AGGREGATE (ltype->next) &&
2082 !IS_PTR (ltype->next))
2083 ? ltype : ltype->next), 0);
2085 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (ltype->next));
2087 return IC_RESULT (ic);
2090 /*-----------------------------------------------------------------*/
2091 /* geniCodeStruct - generates intermediate code for structres */
2092 /*-----------------------------------------------------------------*/
2094 geniCodeStruct (operand * left, operand * right, bool islval)
2097 sym_link *type = operandType (left);
2098 sym_link *etype = getSpec (type);
2100 symbol *element = getStructElement (SPEC_STRUCT (etype),
2101 right->operand.symOperand);
2103 /* add the offset */
2104 ic = newiCode ('+', left, operandFromLit (element->offset));
2106 IC_RESULT (ic) = newiTempOperand (element->type, 0);
2108 /* preserve the storage & output class of the struct */
2109 /* as well as the volatile attribute */
2110 retype = getSpec (operandType (IC_RESULT (ic)));
2111 SPEC_SCLS (retype) = SPEC_SCLS (etype);
2112 SPEC_OCLS (retype) = SPEC_OCLS (etype);
2113 SPEC_VOLATILE (retype) |= SPEC_VOLATILE (etype);
2115 if (IS_PTR (element->type))
2116 setOperandType (IC_RESULT (ic), aggrToPtr (operandType (IC_RESULT (ic)), TRUE));
2118 IC_RESULT (ic)->isaddr = (!IS_AGGREGATE (element->type));
2122 return (islval ? IC_RESULT (ic) : geniCodeRValue (IC_RESULT (ic), TRUE));
2125 /*-----------------------------------------------------------------*/
2126 /* geniCodePostInc - generate int code for Post increment */
2127 /*-----------------------------------------------------------------*/
2129 geniCodePostInc (operand * op)
2133 sym_link *optype = operandType (op);
2135 operand *rv = (IS_ITEMP (op) ?
2136 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2138 sym_link *rvtype = operandType (rv);
2141 /* if this is not an address we have trouble */
2144 werror (E_LVALUE_REQUIRED, "++");
2148 rOp = newiTempOperand (rvtype, 0);
2149 OP_SYMBOL(rOp)->noSpilLoc = 1;
2152 OP_SYMBOL(rv)->noSpilLoc = 1;
2154 geniCodeAssign (rOp, rv, 0);
2156 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2157 if (IS_FLOAT (rvtype))
2158 ic = newiCode ('+', rv, operandFromValue (constFloatVal ("1.0")));
2160 ic = newiCode ('+', rv, operandFromLit (size));
2162 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2165 geniCodeAssign (op, result, 0);
2171 /*-----------------------------------------------------------------*/
2172 /* geniCodePreInc - generate code for preIncrement */
2173 /*-----------------------------------------------------------------*/
2175 geniCodePreInc (operand * op)
2178 sym_link *optype = operandType (op);
2179 operand *rop = (IS_ITEMP (op) ?
2180 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2182 sym_link *roptype = operandType (rop);
2188 werror (E_LVALUE_REQUIRED, "++");
2193 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2194 if (IS_FLOAT (roptype))
2195 ic = newiCode ('+', rop, operandFromValue (constFloatVal ("1.0")));
2197 ic = newiCode ('+', rop, operandFromLit (size));
2198 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2202 return geniCodeAssign (op, result, 0);
2205 /*-----------------------------------------------------------------*/
2206 /* geniCodePostDec - generates code for Post decrement */
2207 /*-----------------------------------------------------------------*/
2209 geniCodePostDec (operand * op)
2213 sym_link *optype = operandType (op);
2215 operand *rv = (IS_ITEMP (op) ?
2216 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2218 sym_link *rvtype = operandType (rv);
2221 /* if this is not an address we have trouble */
2224 werror (E_LVALUE_REQUIRED, "--");
2228 rOp = newiTempOperand (rvtype, 0);
2229 OP_SYMBOL(rOp)->noSpilLoc = 1;
2232 OP_SYMBOL(rv)->noSpilLoc = 1;
2234 geniCodeAssign (rOp, rv, 0);
2236 size = (IS_PTR (rvtype) ? getSize (rvtype->next) : 1);
2237 if (IS_FLOAT (rvtype))
2238 ic = newiCode ('-', rv, operandFromValue (constFloatVal ("1.0")));
2240 ic = newiCode ('-', rv, operandFromLit (size));
2242 IC_RESULT (ic) = result = newiTempOperand (rvtype, 0);
2245 geniCodeAssign (op, result, 0);
2251 /*-----------------------------------------------------------------*/
2252 /* geniCodePreDec - generate code for pre decrement */
2253 /*-----------------------------------------------------------------*/
2255 geniCodePreDec (operand * op)
2258 sym_link *optype = operandType (op);
2259 operand *rop = (IS_ITEMP (op) ?
2260 geniCodeRValue (op, (IS_PTR (optype) ? TRUE : FALSE)) :
2262 sym_link *roptype = operandType (rop);
2268 werror (E_LVALUE_REQUIRED, "--");
2273 size = (IS_PTR (roptype) ? getSize (roptype->next) : 1);
2274 if (IS_FLOAT (roptype))
2275 ic = newiCode ('-', rop, operandFromValue (constFloatVal ("1.0")));
2277 ic = newiCode ('-', rop, operandFromLit (size));
2278 IC_RESULT (ic) = result = newiTempOperand (roptype, 0);
2282 return geniCodeAssign (op, result, 0);
2286 /*-----------------------------------------------------------------*/
2287 /* geniCodeBitwise - gen int code for bitWise operators */
2288 /*-----------------------------------------------------------------*/
2290 geniCodeBitwise (operand * left, operand * right,
2291 int oper, sym_link * resType)
2295 // bitwise operations must be done unsigned
2296 // WHY ? causes very bad things to happen with CSE
2297 // SPEC_USIGN(resType)=1;
2299 left = geniCodeCast (resType, left, TRUE);
2300 right = geniCodeCast (resType, right, TRUE);
2302 ic = newiCode (oper, left, right);
2303 IC_RESULT (ic) = newiTempOperand (resType, 0);
2306 return IC_RESULT (ic);
2309 /*-----------------------------------------------------------------*/
2310 /* geniCodeAddressOf - gens icode for '&' address of operator */
2311 /*-----------------------------------------------------------------*/
2313 geniCodeAddressOf (operand * op)
2317 sym_link *optype = operandType (op);
2318 sym_link *opetype = getSpec (optype);
2320 /* lvalue check already done in decorateType */
2321 /* this must be a lvalue */
2322 /* if (!op->isaddr && !IS_AGGREGATE(optype)) { */
2323 /* werror (E_LVALUE_REQUIRED,"&"); */
2328 p->class = DECLARATOR;
2330 /* set the pointer depending on the storage class */
2331 if ((DCL_TYPE (p) = PTR_TYPE (SPEC_OCLS (opetype))) == CPOINTER)
2332 DCL_PTR_CONST (p) = port->mem.code_ro;
2334 /* make sure we preserve the const & volatile */
2335 if (IS_CONSTANT (opetype))
2336 DCL_PTR_CONST (p) = 1;
2338 if (IS_VOLATILE (opetype))
2339 DCL_PTR_VOLATILE (p) = 1;
2341 p->next = copyLinkChain (optype);
2343 /* if already a temp */
2346 setOperandType (op, p);
2351 /* other wise make this of the type coming in */
2352 ic = newiCode (ADDRESS_OF, op, NULL);
2353 IC_RESULT (ic) = newiTempOperand (p, 1);
2354 IC_RESULT (ic)->isaddr = 0;
2356 return IC_RESULT (ic);
2358 /*-----------------------------------------------------------------*/
2359 /* setOClass - sets the output class depending on the pointer type */
2360 /*-----------------------------------------------------------------*/
2362 setOClass (sym_link * ptr, sym_link * spec)
2364 switch (DCL_TYPE (ptr))
2367 SPEC_OCLS (spec) = data;
2371 SPEC_OCLS (spec) = generic;
2375 SPEC_OCLS (spec) = xdata;
2379 SPEC_OCLS (spec) = code;
2383 SPEC_OCLS (spec) = idata;
2387 SPEC_OCLS (spec) = xstack;
2391 SPEC_OCLS (spec) = eeprom;
2400 /*-----------------------------------------------------------------*/
2401 /* geniCodeDerefPtr - dereference pointer with '*' */
2402 /*-----------------------------------------------------------------*/
2404 geniCodeDerefPtr (operand * op,int lvl)
2406 sym_link *rtype, *retype;
2407 sym_link *optype = operandType (op);
2409 /* if this is a pointer then generate the rvalue */
2410 if (IS_PTR (optype))
2412 if (IS_TRUE_SYMOP (op))
2415 op = geniCodeRValue (op, TRUE);
2418 op = geniCodeRValue (op, TRUE);
2421 /* now get rid of the pointer part */
2422 if (isLvaluereq(lvl) && IS_ITEMP (op))
2424 retype = getSpec (rtype = copyLinkChain (optype));
2428 retype = getSpec (rtype = copyLinkChain (optype->next));
2431 /* if this is a pointer then outputclass needs 2b updated */
2432 if (IS_PTR (optype))
2433 setOClass (optype, retype);
2435 op->isGptr = IS_GENPTR (optype);
2437 /* if the pointer was declared as a constant */
2438 /* then we cannot allow assignment to the derefed */
2439 if (IS_PTR_CONST (optype))
2440 SPEC_CONST (retype) = 1;
2442 op->isaddr = (IS_PTR (rtype) ||
2443 IS_STRUCT (rtype) ||
2448 if (!isLvaluereq(lvl))
2449 op = geniCodeRValue (op, TRUE);
2451 setOperandType (op, rtype);
2456 /*-----------------------------------------------------------------*/
2457 /* geniCodeUnaryMinus - does a unary minus of the operand */
2458 /*-----------------------------------------------------------------*/
2460 geniCodeUnaryMinus (operand * op)
2463 sym_link *optype = operandType (op);
2465 if (IS_LITERAL (optype))
2466 return operandFromLit (-floatFromVal (op->operand.valOperand));
2468 ic = newiCode (UNARYMINUS, op, NULL);
2469 IC_RESULT (ic) = newiTempOperand (optype, 0);
2471 return IC_RESULT (ic);
2474 /*-----------------------------------------------------------------*/
2475 /* geniCodeLeftShift - gen i code for left shift */
2476 /*-----------------------------------------------------------------*/
2478 geniCodeLeftShift (operand * left, operand * right)
2482 ic = newiCode (LEFT_OP, left, right);
2483 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2485 return IC_RESULT (ic);
2488 /*-----------------------------------------------------------------*/
2489 /* geniCodeRightShift - gen i code for right shift */
2490 /*-----------------------------------------------------------------*/
2492 geniCodeRightShift (operand * left, operand * right)
2496 ic = newiCode (RIGHT_OP, left, right);
2497 IC_RESULT (ic) = newiTempOperand (operandType (left), 0);
2499 return IC_RESULT (ic);
2502 /*-----------------------------------------------------------------*/
2503 /* geniCodeLogic- logic code */
2504 /*-----------------------------------------------------------------*/
2506 geniCodeLogic (operand * left, operand * right, int op)
2510 sym_link *rtype = operandType (right);
2511 sym_link *ltype = operandType (left);
2513 /* left is integral type and right is literal then
2514 check if the literal value is within bounds */
2515 if (IS_INTEGRAL (ltype) && IS_VALOP (right) && IS_LITERAL (rtype))
2517 checkConstantRange(ltype,
2518 OP_VALUE(right), "compare operation", 1);
2521 ctype = usualBinaryConversions (&left, &right);
2523 ic = newiCode (op, left, right);
2524 IC_RESULT (ic) = newiTempOperand (newCharLink (), 1);
2526 /* if comparing float
2527 and not a '==' || '!=' || '&&' || '||' (these
2529 if (IS_FLOAT(ctype) &&
2537 return IC_RESULT (ic);
2540 /*-----------------------------------------------------------------*/
2541 /* geniCodeUnary - for a a generic unary operation */
2542 /*-----------------------------------------------------------------*/
2544 geniCodeUnary (operand * op, int oper)
2546 iCode *ic = newiCode (oper, op, NULL);
2548 IC_RESULT (ic) = newiTempOperand (operandType (op), 0);
2550 return IC_RESULT (ic);
2553 /*-----------------------------------------------------------------*/
2554 /* geniCodeConditional - geniCode for '?' ':' operation */
2555 /*-----------------------------------------------------------------*/
2557 geniCodeConditional (ast * tree,int lvl)
2560 symbol *falseLabel = newiTempLabel (NULL);
2561 symbol *exitLabel = newiTempLabel (NULL);
2562 operand *cond = ast2iCode (tree->left,lvl+1);
2563 operand *true, *false, *result;
2565 ic = newiCodeCondition (geniCodeRValue (cond, FALSE),
2569 true = ast2iCode (tree->right->left,lvl+1);
2571 /* move the value to a new Operand */
2572 result = newiTempOperand (operandType (true), 0);
2573 geniCodeAssign (result, geniCodeRValue (true, FALSE), 0);
2575 /* generate an unconditional goto */
2576 geniCodeGoto (exitLabel);
2578 /* now for the right side */
2579 geniCodeLabel (falseLabel);
2581 false = ast2iCode (tree->right->right,lvl+1);
2582 geniCodeAssign (result, geniCodeRValue (false, FALSE), 0);
2584 /* create the exit label */
2585 geniCodeLabel (exitLabel);
2590 /*-----------------------------------------------------------------*/
2591 /* geniCodeAssign - generate code for assignment */
2592 /*-----------------------------------------------------------------*/
2594 geniCodeAssign (operand * left, operand * right, int nosupdate)
2597 sym_link *ltype = operandType (left);
2598 sym_link *rtype = operandType (right);
2600 if (!left->isaddr && !IS_ITEMP (left))
2602 werror (E_LVALUE_REQUIRED, "assignment");
2606 /* left is integral type and right is literal then
2607 check if the literal value is within bounds */
2608 if (IS_INTEGRAL (ltype) && right->type == VALUE && IS_LITERAL (rtype))
2610 checkConstantRange(ltype,
2611 OP_VALUE(right), "= operation", 0);
2614 /* if the left & right type don't exactly match */
2615 /* if pointer set then make sure the check is
2616 done with the type & not the pointer */
2617 /* then cast rights type to left */
2619 /* first check the type for pointer assignement */
2620 if (left->isaddr && IS_PTR (ltype) && IS_ITEMP (left) &&
2621 compareType (ltype, rtype) <= 0)
2623 if (compareType (ltype->next, rtype) < 0)
2624 right = geniCodeCast (ltype->next, right, TRUE);
2626 else if (compareType (ltype, rtype) < 0)
2627 right = geniCodeCast (ltype, right, TRUE);
2629 /* if left is a true symbol & ! volatile
2630 create an assignment to temporary for
2631 the right & then assign this temporary
2632 to the symbol this is SSA . isn't it simple
2633 and folks have published mountains of paper on it */
2634 if (IS_TRUE_SYMOP (left) &&
2635 !isOperandVolatile (left, FALSE) &&
2636 isOperandGlobal (left))
2640 if (IS_TRUE_SYMOP (right))
2641 sym = OP_SYMBOL (right);
2642 ic = newiCode ('=', NULL, right);
2643 IC_RESULT (ic) = right = newiTempOperand (ltype, 0);
2644 SPIL_LOC (right) = sym;
2648 ic = newiCode ('=', NULL, right);
2649 IC_RESULT (ic) = left;
2652 /* if left isgptr flag is set then support
2653 routine will be required */
2657 ic->nosupdate = nosupdate;
2661 /*-----------------------------------------------------------------*/
2662 /* geniCodeSEParms - generate code for side effecting fcalls */
2663 /*-----------------------------------------------------------------*/
2665 geniCodeSEParms (ast * parms,int lvl)
2670 if (parms->type == EX_OP && parms->opval.op == PARAM)
2672 geniCodeSEParms (parms->left,lvl);
2673 geniCodeSEParms (parms->right,lvl);
2677 /* hack don't like this but too lazy to think of
2679 if (IS_ADDRESS_OF_OP (parms))
2680 parms->left->lvalue = 1;
2682 if (IS_CAST_OP (parms) &&
2683 IS_PTR (parms->ftype) &&
2684 IS_ADDRESS_OF_OP (parms->right))
2685 parms->right->left->lvalue = 1;
2687 parms->opval.oprnd =
2688 geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
2690 parms->type = EX_OPERAND;
2693 /*-----------------------------------------------------------------*/
2694 /* geniCodeParms - generates parameters */
2695 /*-----------------------------------------------------------------*/
2697 geniCodeParms (ast * parms, value *argVals, int *stack,
2698 sym_link * fetype, symbol * func,int lvl)
2706 if (argVals==NULL) {
2708 argVals=FUNC_ARGS(func->type);
2711 /* if this is a param node then do the left & right */
2712 if (parms->type == EX_OP && parms->opval.op == PARAM)
2714 argVals=geniCodeParms (parms->left, argVals, stack, fetype, func,lvl);
2715 argVals=geniCodeParms (parms->right, argVals, stack, fetype, func,lvl);
2719 /* get the parameter value */
2720 if (parms->type == EX_OPERAND)
2721 pval = parms->opval.oprnd;
2724 /* maybe this else should go away ?? */
2725 /* hack don't like this but too lazy to think of
2727 if (IS_ADDRESS_OF_OP (parms))
2728 parms->left->lvalue = 1;
2730 if (IS_CAST_OP (parms) &&
2731 IS_PTR (parms->ftype) &&
2732 IS_ADDRESS_OF_OP (parms->right))
2733 parms->right->left->lvalue = 1;
2735 pval = geniCodeRValue (ast2iCode (parms,lvl+1), FALSE);
2738 /* if register parm then make it a send */
2739 if (IS_REGPARM (parms->etype) && !IFFUNC_HASVARARGS(func->type))
2741 ic = newiCode (SEND, pval, NULL);
2746 /* now decide whether to push or assign */
2747 if (!(options.stackAuto || IFFUNC_ISREENT (func->type)))
2751 operand *top = operandFromSymbol (argVals->sym);
2752 geniCodeAssign (top, pval, 1);
2756 sym_link *p = operandType (pval);
2758 ic = newiCode (IPUSH, pval, NULL);
2760 /* update the stack adjustment */
2761 *stack += getSize (IS_AGGREGATE (p) ? aggrToPtr (p, FALSE) : p);
2766 argVals=argVals->next;
2770 /*-----------------------------------------------------------------*/
2771 /* geniCodeCall - generates temp code for calling */
2772 /*-----------------------------------------------------------------*/
2774 geniCodeCall (operand * left, ast * parms,int lvl)
2778 sym_link *type, *etype;
2781 if (!IS_FUNC(OP_SYMBOL(left)->type) &&
2782 !IS_CODEPTR(OP_SYMBOL(left)->type)) {
2783 werror (E_FUNCTION_EXPECTED);
2787 /* take care of parameters with side-effecting
2788 function calls in them, this is required to take care
2789 of overlaying function parameters */
2790 geniCodeSEParms (parms,lvl);
2792 /* first the parameters */
2793 geniCodeParms (parms, NULL, &stack, getSpec (operandType (left)), OP_SYMBOL (left),lvl);
2795 /* now call : if symbol then pcall */
2796 if (IS_OP_POINTER (left) || IS_ITEMP(left))
2797 ic = newiCode (PCALL, left, NULL);
2799 ic = newiCode (CALL, left, NULL);
2801 type = copyLinkChain (operandType (left)->next);
2802 etype = getSpec (type);
2803 SPEC_EXTR (etype) = 0;
2804 IC_RESULT (ic) = result = newiTempOperand (type, 1);
2808 /* stack adjustment after call */
2809 ic->parmBytes = stack;
2814 /*-----------------------------------------------------------------*/
2815 /* geniCodeReceive - generate intermediate code for "receive" */
2816 /*-----------------------------------------------------------------*/
2818 geniCodeReceive (value * args)
2820 /* for all arguments that are passed in registers */
2824 if (IS_REGPARM (args->etype))
2826 operand *opr = operandFromValue (args);
2828 symbol *sym = OP_SYMBOL (opr);
2831 /* we will use it after all optimizations
2832 and before liveRange calculation */
2833 if (!sym->addrtaken && !IS_VOLATILE (sym->etype))
2836 if (IN_FARSPACE (SPEC_OCLS (sym->etype)) &&
2837 options.stackAuto == 0 &&
2838 /* !TARGET_IS_DS390) */
2839 (!(options.model == MODEL_FLAT24)) )
2844 opl = newiTempOperand (args->type, 0);
2846 sym->reqv->key = sym->key;
2847 OP_SYMBOL (sym->reqv)->key = sym->key;
2848 OP_SYMBOL (sym->reqv)->isreqv = 1;
2849 OP_SYMBOL (sym->reqv)->islocal = 0;
2850 SPIL_LOC (sym->reqv) = sym;
2854 ic = newiCode (RECEIVE, NULL, NULL);
2855 currFunc->recvSize = getSize (sym->etype);
2856 IC_RESULT (ic) = opr;
2864 /*-----------------------------------------------------------------*/
2865 /* geniCodeFunctionBody - create the function body */
2866 /*-----------------------------------------------------------------*/
2868 geniCodeFunctionBody (ast * tree,int lvl)
2875 /* reset the auto generation */
2881 func = ast2iCode (tree->left,lvl+1);
2882 fetype = getSpec (operandType (func));
2884 savelineno = lineno;
2885 lineno = OP_SYMBOL (func)->lineDef;
2886 /* create an entry label */
2887 geniCodeLabel (entryLabel);
2888 lineno = savelineno;
2890 /* create a proc icode */
2891 ic = newiCode (FUNCTION, func, NULL);
2892 ic->lineno = OP_SYMBOL (func)->lineDef;
2896 /* for all parameters that are passed
2897 on registers add a "receive" */
2898 geniCodeReceive (tree->values.args);
2900 /* generate code for the body */
2901 ast2iCode (tree->right,lvl+1);
2903 /* create a label for return */
2904 geniCodeLabel (returnLabel);
2906 /* now generate the end proc */
2907 ic = newiCode (ENDFUNCTION, func, NULL);
2912 /*-----------------------------------------------------------------*/
2913 /* geniCodeReturn - gen icode for 'return' statement */
2914 /*-----------------------------------------------------------------*/
2916 geniCodeReturn (operand * op)
2920 /* if the operand is present force an rvalue */
2922 op = geniCodeRValue (op, FALSE);
2924 ic = newiCode (RETURN, op, NULL);
2928 /*-----------------------------------------------------------------*/
2929 /* geniCodeIfx - generates code for extended if statement */
2930 /*-----------------------------------------------------------------*/
2932 geniCodeIfx (ast * tree,int lvl)
2935 operand *condition = ast2iCode (tree->left,lvl+1);
2938 /* if condition is null then exit */
2942 condition = geniCodeRValue (condition, FALSE);
2944 cetype = getSpec (operandType (condition));
2945 /* if the condition is a literal */
2946 if (IS_LITERAL (cetype))
2948 if (floatFromVal (condition->operand.valOperand))
2950 if (tree->trueLabel)
2951 geniCodeGoto (tree->trueLabel);
2957 if (tree->falseLabel)
2958 geniCodeGoto (tree->falseLabel);
2965 if (tree->trueLabel)
2967 ic = newiCodeCondition (condition,
2972 if (tree->falseLabel)
2973 geniCodeGoto (tree->falseLabel);
2977 ic = newiCodeCondition (condition,
2984 ast2iCode (tree->right,lvl+1);
2987 /*-----------------------------------------------------------------*/
2988 /* geniCodeJumpTable - tries to create a jump table for switch */
2989 /*-----------------------------------------------------------------*/
2991 geniCodeJumpTable (operand * cond, value * caseVals, ast * tree)
2993 int min = 0, max = 0, t, cnt = 0;
3000 if (!tree || !caseVals)
3003 /* the criteria for creating a jump table is */
3004 /* all integer numbers between the maximum & minimum must */
3005 /* be present , the maximum value should not exceed 255 */
3006 min = max = (int) floatFromVal (vch = caseVals);
3007 sprintf (buffer, "_case_%d_%d",
3008 tree->values.switchVals.swNum,
3010 addSet (&labels, newiTempLabel (buffer));
3012 /* if there is only one case value then no need */
3013 if (!(vch = vch->next))
3018 if (((t = (int) floatFromVal (vch)) - max) != 1)
3020 sprintf (buffer, "_case_%d_%d",
3021 tree->values.switchVals.swNum,
3023 addSet (&labels, newiTempLabel (buffer));
3029 /* if the number of case statements <= 2 then */
3030 /* it is not economical to create the jump table */
3031 /* since two compares are needed for boundary conditions */
3032 if ((!optimize.noJTabBoundary && cnt <= 2) || max > (255 / 3))
3035 if (tree->values.switchVals.swDefault)
3036 sprintf (buffer, "_default_%d", tree->values.switchVals.swNum);
3038 sprintf (buffer, "_swBrk_%d", tree->values.switchVals.swNum);
3040 falseLabel = newiTempLabel (buffer);
3042 /* so we can create a jumptable */
3043 /* first we rule out the boundary conditions */
3044 /* if only optimization says so */
3045 if (!optimize.noJTabBoundary)
3047 sym_link *cetype = getSpec (operandType (cond));
3048 /* no need to check the lower bound if
3049 the condition is unsigned & minimum value is zero */
3050 if (!(min == 0 && SPEC_USIGN (cetype)))
3052 boundary = geniCodeLogic (cond, operandFromLit (min), '<');
3053 ic = newiCodeCondition (boundary, falseLabel, NULL);
3057 /* now for upper bounds */
3058 boundary = geniCodeLogic (cond, operandFromLit (max), '>');
3059 ic = newiCodeCondition (boundary, falseLabel, NULL);
3063 /* if the min is not zero then we no make it zero */
3066 cond = geniCodeSubtract (cond, operandFromLit (min));
3067 setOperandType (cond, UCHARTYPE);
3070 /* now create the jumptable */
3071 ic = newiCode (JUMPTABLE, NULL, NULL);
3072 IC_JTCOND (ic) = cond;
3073 IC_JTLABELS (ic) = labels;
3078 /*-----------------------------------------------------------------*/
3079 /* geniCodeSwitch - changes a switch to a if statement */
3080 /*-----------------------------------------------------------------*/
3082 geniCodeSwitch (ast * tree,int lvl)
3085 operand *cond = geniCodeRValue (ast2iCode (tree->left,lvl+1), FALSE);
3086 value *caseVals = tree->values.switchVals.swVals;
3087 symbol *trueLabel, *falseLabel;
3089 /* if we can make this a jump table */
3090 if (geniCodeJumpTable (cond, caseVals, tree))
3091 goto jumpTable; /* no need for the comparison */
3093 /* for the cases defined do */
3097 operand *compare = geniCodeLogic (cond,
3098 operandFromValue (caseVals),
3101 sprintf (buffer, "_case_%d_%d",
3102 tree->values.switchVals.swNum,
3103 (int) floatFromVal (caseVals));
3104 trueLabel = newiTempLabel (buffer);
3106 ic = newiCodeCondition (compare, trueLabel, NULL);
3108 caseVals = caseVals->next;
3113 /* if default is present then goto break else break */
3114 if (tree->values.switchVals.swDefault)
3115 sprintf (buffer, "_default_%d", tree->values.switchVals.swNum);
3117 sprintf (buffer, "_swBrk_%d", tree->values.switchVals.swNum);
3119 falseLabel = newiTempLabel (buffer);
3120 geniCodeGoto (falseLabel);
3123 ast2iCode (tree->right,lvl+1);
3126 /*-----------------------------------------------------------------*/
3127 /* geniCodeInline - intermediate code for inline assembler */
3128 /*-----------------------------------------------------------------*/
3130 geniCodeInline (ast * tree)
3134 ic = newiCode (INLINEASM, NULL, NULL);
3135 IC_INLINE (ic) = tree->values.inlineasm;
3139 /*-----------------------------------------------------------------*/
3140 /* geniCodeArrayInit - intermediate code for array initializer */
3141 /*-----------------------------------------------------------------*/
3143 geniCodeArrayInit (ast * tree, operand *array)
3147 if (!getenv("TRY_THE_NEW_INITIALIZER")) {
3148 ic = newiCode (ARRAYINIT, array, NULL);
3149 IC_ARRAYILIST (ic) = tree->values.constlist;
3151 operand *left=newOperand(), *right=newOperand();
3152 left->type=right->type=SYMBOL;
3153 OP_SYMBOL(left)=AST_SYMBOL(tree->left);
3154 OP_SYMBOL(right)=AST_SYMBOL(tree->right);
3155 ic = newiCode (ARRAYINIT, left, right);
3160 /*-----------------------------------------------------------------*/
3161 /* Stuff used in ast2iCode to modify geniCodeDerefPtr in some */
3162 /* particular case. Ie : assigning or dereferencing array or ptr */
3163 /*-----------------------------------------------------------------*/
3164 set * lvaluereqSet = NULL;
3165 typedef struct lvalItem
3172 /*-----------------------------------------------------------------*/
3173 /* addLvaluereq - add a flag for lvalreq for current ast level */
3174 /*-----------------------------------------------------------------*/
3175 void addLvaluereq(int lvl)
3177 lvalItem * lpItem = (lvalItem *)Safe_alloc ( sizeof (lvalItem));
3180 addSetHead(&lvaluereqSet,lpItem);
3183 /*-----------------------------------------------------------------*/
3184 /* delLvaluereq - del a flag for lvalreq for current ast level */
3185 /*-----------------------------------------------------------------*/
3189 lpItem = getSet(&lvaluereqSet);
3190 if(lpItem) Safe_free(lpItem);
3192 /*-----------------------------------------------------------------*/
3193 /* clearLvaluereq - clear lvalreq flag */
3194 /*-----------------------------------------------------------------*/
3195 void clearLvaluereq()
3198 lpItem = peekSet(lvaluereqSet);
3199 if(lpItem) lpItem->req = 0;
3201 /*-----------------------------------------------------------------*/
3202 /* getLvaluereq - get the last lvalreq level */
3203 /*-----------------------------------------------------------------*/
3204 int getLvaluereqLvl()
3207 lpItem = peekSet(lvaluereqSet);
3208 if(lpItem) return lpItem->lvl;
3211 /*-----------------------------------------------------------------*/
3212 /* isLvaluereq - is lvalreq valid for this level ? */
3213 /*-----------------------------------------------------------------*/
3214 int isLvaluereq(int lvl)
3217 lpItem = peekSet(lvaluereqSet);
3218 if(lpItem) return ((lpItem->req)&&(lvl <= (lpItem->lvl+1)));
3222 /*-----------------------------------------------------------------*/
3223 /* ast2iCode - creates an icodeList from an ast */
3224 /*-----------------------------------------------------------------*/
3226 ast2iCode (ast * tree,int lvl)
3228 operand *left = NULL;
3229 operand *right = NULL;
3232 /* set the global variables for filename & line number */
3234 filename = tree->filename;
3236 lineno = tree->lineno;
3238 block = tree->block;
3240 scopeLevel = tree->level;
3242 if (tree->type == EX_VALUE)
3243 return operandFromValue (tree->opval.val);
3245 if (tree->type == EX_LINK)
3246 return operandFromLink (tree->opval.lnk);
3248 /* if we find a nullop */
3249 if (tree->type == EX_OP &&
3250 (tree->opval.op == NULLOP ||
3251 tree->opval.op == BLOCK))
3253 ast2iCode (tree->left,lvl+1);
3254 ast2iCode (tree->right,lvl+1);
3258 /* special cases for not evaluating */
3259 if (tree->opval.op != ':' &&
3260 tree->opval.op != '?' &&
3261 tree->opval.op != CALL &&
3262 tree->opval.op != IFX &&
3263 tree->opval.op != LABEL &&
3264 tree->opval.op != GOTO &&
3265 tree->opval.op != SWITCH &&
3266 tree->opval.op != FUNCTION &&
3267 tree->opval.op != INLINEASM)
3270 if (IS_ASSIGN_OP (tree->opval.op) ||
3271 IS_DEREF_OP (tree) ||
3272 (tree->opval.op == '&' && !tree->right) ||
3273 tree->opval.op == PTR_OP)
3276 if ((IS_ARRAY_OP (tree->left) && IS_ARRAY_OP (tree->left->left)) ||
3277 (IS_DEREF_OP (tree) && IS_ARRAY_OP (tree->left)))
3280 left = operandFromAst (tree->left,lvl);
3282 if (IS_DEREF_OP (tree) && IS_DEREF_OP (tree->left))
3283 left = geniCodeRValue (left, TRUE);
3287 left = operandFromAst (tree->left,lvl);
3289 if (tree->opval.op == INC_OP ||
3290 tree->opval.op == DEC_OP)
3293 right = operandFromAst (tree->right,lvl);
3298 right = operandFromAst (tree->right,lvl);
3302 /* now depending on the type of operand */
3303 /* this will be a biggy */
3304 switch (tree->opval.op)
3307 case '[': /* array operation */
3309 //sym_link *ltype = operandType (left);
3310 //left = geniCodeRValue (left, IS_PTR (ltype->next) ? TRUE : FALSE);
3311 left = geniCodeRValue (left, FALSE);
3312 right = geniCodeRValue (right, TRUE);
3315 return geniCodeArray (left, right,lvl);
3317 case '.': /* structure dereference */
3318 if (IS_PTR (operandType (left)))
3319 left = geniCodeRValue (left, TRUE);
3321 left = geniCodeRValue (left, FALSE);
3323 return geniCodeStruct (left, right, tree->lvalue);
3325 case PTR_OP: /* structure pointer dereference */
3328 pType = operandType (left);
3329 left = geniCodeRValue (left, TRUE);
3331 setOClass (pType, getSpec (operandType (left)));
3334 return geniCodeStruct (left, right, tree->lvalue);
3336 case INC_OP: /* increment operator */
3338 return geniCodePostInc (left);
3340 return geniCodePreInc (right);
3342 case DEC_OP: /* decrement operator */
3344 return geniCodePostDec (left);
3346 return geniCodePreDec (right);
3348 case '&': /* bitwise and or address of operator */
3350 { /* this is a bitwise operator */
3351 left = geniCodeRValue (left, FALSE);
3352 right = geniCodeRValue (right, FALSE);
3353 return geniCodeBitwise (left, right, BITWISEAND, tree->ftype);
3356 return geniCodeAddressOf (left);
3358 case '|': /* bitwise or & xor */
3360 return geniCodeBitwise (geniCodeRValue (left, FALSE),
3361 geniCodeRValue (right, FALSE),
3366 return geniCodeDivision (geniCodeRValue (left, FALSE),
3367 geniCodeRValue (right, FALSE));
3370 return geniCodeModulus (geniCodeRValue (left, FALSE),
3371 geniCodeRValue (right, FALSE));
3374 return geniCodeMultiply (geniCodeRValue (left, FALSE),
3375 geniCodeRValue (right, FALSE),IS_INT(tree->ftype));
3377 return geniCodeDerefPtr (geniCodeRValue (left, FALSE),lvl);
3381 return geniCodeSubtract (geniCodeRValue (left, FALSE),
3382 geniCodeRValue (right, FALSE));
3384 return geniCodeUnaryMinus (geniCodeRValue (left, FALSE));
3388 return geniCodeAdd (geniCodeRValue (left, FALSE),
3389 geniCodeRValue (right, FALSE),lvl);
3391 return geniCodeRValue (left, FALSE); /* unary '+' has no meaning */
3394 return geniCodeLeftShift (geniCodeRValue (left, FALSE),
3395 geniCodeRValue (right, FALSE));
3398 return geniCodeRightShift (geniCodeRValue (left, FALSE),
3399 geniCodeRValue (right, FALSE));
3401 return geniCodeCast (operandType (left),
3402 geniCodeRValue (right, FALSE), FALSE);
3408 return geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3412 operand *op = geniCodeUnary (geniCodeRValue (left, FALSE), tree->opval.op);
3413 setOperandType (op, UCHARTYPE);
3424 return geniCodeLogic (geniCodeRValue (left, FALSE),
3425 geniCodeRValue (right, FALSE),
3428 return geniCodeConditional (tree,lvl);
3431 return operandFromLit (getSize (tree->right->ftype));
3435 sym_link *rtype = operandType (right);
3436 sym_link *ltype = operandType (left);
3437 if (IS_PTR (rtype) && IS_ITEMP (right)
3438 && right->isaddr && compareType (rtype->next, ltype) == 1)
3439 right = geniCodeRValue (right, TRUE);
3441 right = geniCodeRValue (right, FALSE);
3443 geniCodeAssign (left, right, 0);
3448 geniCodeAssign (left,
3449 geniCodeMultiply (geniCodeRValue (operandFromOperand (left),
3451 geniCodeRValue (right, FALSE),FALSE), 0);
3455 geniCodeAssign (left,
3456 geniCodeDivision (geniCodeRValue (operandFromOperand (left),
3458 geniCodeRValue (right, FALSE)), 0);
3461 geniCodeAssign (left,
3462 geniCodeModulus (geniCodeRValue (operandFromOperand (left),
3464 geniCodeRValue (right, FALSE)), 0);
3467 sym_link *rtype = operandType (right);
3468 sym_link *ltype = operandType (left);
3469 if (IS_PTR (rtype) && IS_ITEMP (right)
3470 && right->isaddr && compareType (rtype->next, ltype) == 1)
3471 right = geniCodeRValue (right, TRUE);
3473 right = geniCodeRValue (right, FALSE);
3476 return geniCodeAssign (left,
3477 geniCodeAdd (geniCodeRValue (operandFromOperand (left),
3483 sym_link *rtype = operandType (right);
3484 sym_link *ltype = operandType (left);
3485 if (IS_PTR (rtype) && IS_ITEMP (right)
3486 && right->isaddr && compareType (rtype->next, ltype) == 1)
3488 right = geniCodeRValue (right, TRUE);
3492 right = geniCodeRValue (right, FALSE);
3495 geniCodeAssign (left,
3496 geniCodeSubtract (geniCodeRValue (operandFromOperand (left),
3502 geniCodeAssign (left,
3503 geniCodeLeftShift (geniCodeRValue (operandFromOperand (left)
3505 geniCodeRValue (right, FALSE)), 0);
3508 geniCodeAssign (left,
3509 geniCodeRightShift (geniCodeRValue (operandFromOperand (left)
3511 geniCodeRValue (right, FALSE)), 0);
3514 geniCodeAssign (left,
3515 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3517 geniCodeRValue (right, FALSE),
3519 operandType (left)), 0);
3522 geniCodeAssign (left,
3523 geniCodeBitwise (geniCodeRValue (operandFromOperand (left),
3525 geniCodeRValue (right, FALSE),
3527 operandType (left)), 0);
3530 geniCodeAssign (left,
3531 geniCodeBitwise (geniCodeRValue (operandFromOperand (left)
3533 geniCodeRValue (right, FALSE),
3535 operandType (left)), 0);
3537 return geniCodeRValue (right, FALSE);
3540 return geniCodeCall (ast2iCode (tree->left,lvl+1),
3543 geniCodeLabel (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3544 return ast2iCode (tree->right,lvl+1);
3547 geniCodeGoto (ast2iCode (tree->left,lvl+1)->operand.symOperand);
3548 return ast2iCode (tree->right,lvl+1);
3551 geniCodeFunctionBody (tree,lvl);
3555 geniCodeReturn (right);
3559 geniCodeIfx (tree,lvl);
3563 geniCodeSwitch (tree,lvl);
3567 geniCodeInline (tree);
3571 geniCodeArrayInit(tree, ast2iCode (tree->left,lvl+1));
3578 /*-----------------------------------------------------------------*/
3579 /* reverseICChain - gets from the list and creates a linkedlist */
3580 /*-----------------------------------------------------------------*/
3587 while ((loop = getSet (&iCodeChain)))
3599 /*-----------------------------------------------------------------*/
3600 /* iCodeFromAst - given an ast will convert it to iCode */
3601 /*-----------------------------------------------------------------*/
3603 iCodeFromAst (ast * tree)
3605 returnLabel = newiTempLabel ("_return");
3606 entryLabel = newiTempLabel ("_entry");
3608 return reverseiCChain ();