1 /*-------------------------------------------------------------------------
2 SDCCast.c - source file for parser support & all ast related routines
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 set *operKeyReset = NULL;
30 ast *staticAutos = NULL;
33 #define LRVAL(x) x->left->rvalue
34 #define RRVAL(x) x->right->rvalue
35 #define TRVAL(x) x->rvalue
36 #define LLVAL(x) x->left->lvalue
37 #define RLVAL(x) x->right->lvalue
38 #define TLVAL(x) x->lvalue
39 #define RTYPE(x) x->right->ftype
40 #define RETYPE(x) x->right->etype
41 #define LTYPE(x) x->left->ftype
42 #define LETYPE(x) x->left->etype
43 #define TTYPE(x) x->ftype
44 #define TETYPE(x) x->etype
50 symbol *currFunc=NULL;
51 static ast *createIval (ast *, sym_link *, initList *, ast *);
52 static ast *createIvalCharPtr (ast *, sym_link *, ast *);
53 static ast *optimizeCompare (ast *);
54 ast *optimizeRRCRLC (ast *);
55 ast *optimizeSWAP (ast *);
56 ast *optimizeGetHbit (ast *);
57 ast *backPatchLabels (ast *, symbol *, symbol *);
60 memmap *GcurMemmap=NULL; /* points to the memmap that's currently active */
65 printTypeChain (tree->ftype, stdout);
70 /*-----------------------------------------------------------------*/
71 /* newAst - creates a fresh node for an expression tree */
72 /*-----------------------------------------------------------------*/
74 newAst_ (unsigned type)
77 static int oldLineno = 0;
79 ex = Safe_alloc ( sizeof (ast));
82 ex->lineno = (noLineno ? oldLineno : mylineno);
83 ex->filename = currFname;
84 ex->level = NestLevel;
85 ex->block = currBlockno;
86 ex->initMode = inInitMode;
87 ex->seqPoint = seqPointNo;
92 newAst_VALUE (value * val)
94 ast *ex = newAst_ (EX_VALUE);
100 newAst_OP (unsigned op)
102 ast *ex = newAst_ (EX_OP);
108 newAst_LINK (sym_link * val)
110 ast *ex = newAst_ (EX_LINK);
115 /*-----------------------------------------------------------------*/
116 /* newNode - creates a new node */
117 /*-----------------------------------------------------------------*/
119 newNode (long op, ast * left, ast * right)
130 /*-----------------------------------------------------------------*/
131 /* newIfxNode - creates a new Ifx Node */
132 /*-----------------------------------------------------------------*/
134 newIfxNode (ast * condAst, symbol * trueLabel, symbol * falseLabel)
138 /* if this is a literal then we already know the result */
139 if (condAst->etype && IS_LITERAL (condAst->etype))
141 /* then depending on the expression value */
142 if (floatFromVal (condAst->opval.val))
143 ifxNode = newNode (GOTO,
144 newAst_VALUE (symbolVal (trueLabel)),
147 ifxNode = newNode (GOTO,
148 newAst_VALUE (symbolVal (falseLabel)),
153 ifxNode = newNode (IFX, condAst, NULL);
154 ifxNode->trueLabel = trueLabel;
155 ifxNode->falseLabel = falseLabel;
161 /*-----------------------------------------------------------------*/
162 /* copyAstValues - copies value portion of ast if needed */
163 /*-----------------------------------------------------------------*/
165 copyAstValues (ast * dest, ast * src)
167 switch (src->opval.op)
170 dest->values.sym = copySymbolChain (src->values.sym);
174 dest->values.switchVals.swVals =
175 copyValue (src->values.switchVals.swVals);
176 dest->values.switchVals.swDefault =
177 src->values.switchVals.swDefault;
178 dest->values.switchVals.swNum =
179 src->values.switchVals.swNum;
183 dest->values.inlineasm = Safe_strdup(src->values.inlineasm);
187 dest->values.constlist = copyLiteralList(src->values.constlist);
191 AST_FOR (dest, trueLabel) = copySymbol (AST_FOR (src, trueLabel));
192 AST_FOR (dest, continueLabel) = copySymbol (AST_FOR (src, continueLabel));
193 AST_FOR (dest, falseLabel) = copySymbol (AST_FOR (src, falseLabel));
194 AST_FOR (dest, condLabel) = copySymbol (AST_FOR (src, condLabel));
195 AST_FOR (dest, initExpr) = copyAst (AST_FOR (src, initExpr));
196 AST_FOR (dest, condExpr) = copyAst (AST_FOR (src, condExpr));
197 AST_FOR (dest, loopExpr) = copyAst (AST_FOR (src, loopExpr));
202 /*-----------------------------------------------------------------*/
203 /* copyAst - makes a copy of a given astession */
204 /*-----------------------------------------------------------------*/
213 dest = Safe_alloc ( sizeof (ast));
215 dest->type = src->type;
216 dest->lineno = src->lineno;
217 dest->level = src->level;
218 dest->funcName = src->funcName;
221 dest->etype = getSpec (dest->ftype = copyLinkChain (src->ftype));
223 /* if this is a leaf */
225 if (src->type == EX_VALUE)
227 dest->opval.val = copyValue (src->opval.val);
232 if (src->type == EX_LINK)
234 dest->opval.lnk = copyLinkChain (src->opval.lnk);
238 dest->opval.op = src->opval.op;
240 /* if this is a node that has special values */
241 copyAstValues (dest, src);
243 dest->trueLabel = copySymbol (src->trueLabel);
244 dest->falseLabel = copySymbol (src->falseLabel);
245 dest->left = copyAst (src->left);
246 dest->right = copyAst (src->right);
252 /*-----------------------------------------------------------------*/
253 /* removeIncDecOps: remove for side effects in *_ASSIGN's */
254 /* "*s++ += 3" -> "*s++ = *s++ + 3" */
255 /*-----------------------------------------------------------------*/
256 ast *removeIncDecOps (ast * tree) {
258 // traverse the tree and remove inc/dec ops
263 if (tree->type == EX_OP &&
264 (tree->opval.op == INC_OP || tree->opval.op == DEC_OP)) {
271 tree->left=removeIncDecOps(tree->left);
272 tree->right=removeIncDecOps(tree->right);
277 /*-----------------------------------------------------------------*/
278 /* removePreIncDecOps: remove for side effects in *_ASSIGN's */
279 /* "*++s += 3" -> "*++s = *++s + 3" */
280 /*-----------------------------------------------------------------*/
281 ast *removePreIncDecOps (ast * tree) {
283 // traverse the tree and remove pre-inc/dec ops
288 if (tree->type == EX_OP &&
289 (tree->opval.op == INC_OP || tree->opval.op == DEC_OP)) {
294 tree->left=removePreIncDecOps(tree->left);
295 tree->right=removePreIncDecOps(tree->right);
300 /*-----------------------------------------------------------------*/
301 /* removePostIncDecOps: remove for side effects in *_ASSIGN's */
302 /* "*s++ += 3" -> "*s++ = *s++ + 3" */
303 /*-----------------------------------------------------------------*/
304 ast *removePostIncDecOps (ast * tree) {
306 // traverse the tree and remove pre-inc/dec ops
311 if (tree->type == EX_OP &&
312 (tree->opval.op == INC_OP || tree->opval.op == DEC_OP)) {
317 tree->left=removePostIncDecOps(tree->left);
318 tree->right=removePostIncDecOps(tree->right);
323 /*-----------------------------------------------------------------*/
324 /* hasSEFcalls - returns TRUE if tree has a function call */
325 /*-----------------------------------------------------------------*/
327 hasSEFcalls (ast * tree)
332 if (tree->type == EX_OP &&
333 (tree->opval.op == CALL ||
334 tree->opval.op == PCALL ||
335 tree->opval.op == '=' ||
336 tree->opval.op == INC_OP ||
337 tree->opval.op == DEC_OP))
340 return (hasSEFcalls (tree->left) |
341 hasSEFcalls (tree->right));
344 /*-----------------------------------------------------------------*/
345 /* isAstEqual - compares two asts & returns 1 if they are equal */
346 /*-----------------------------------------------------------------*/
348 isAstEqual (ast * t1, ast * t2)
357 if (t1->type != t2->type)
363 if (t1->opval.op != t2->opval.op)
365 return (isAstEqual (t1->left, t2->left) &&
366 isAstEqual (t1->right, t2->right));
370 if (t1->opval.val->sym)
372 if (!t2->opval.val->sym)
375 return isSymbolEqual (t1->opval.val->sym,
380 if (t2->opval.val->sym)
383 return (floatFromVal (t1->opval.val) ==
384 floatFromVal (t2->opval.val));
388 /* only compare these two types */
396 /*-----------------------------------------------------------------*/
397 /* resolveSymbols - resolve symbols from the symbol table */
398 /*-----------------------------------------------------------------*/
400 resolveSymbols (ast * tree)
402 /* walk the entire tree and check for values */
403 /* with symbols if we find one then replace */
404 /* symbol with that from the symbol table */
411 /* if not block & function */
412 if (tree->type == EX_OP &&
413 (tree->opval.op != FUNCTION &&
414 tree->opval.op != BLOCK &&
415 tree->opval.op != NULLOP))
417 filename = tree->filename;
418 lineno = tree->lineno;
422 /* make sure we resolve the true & false labels for ifx */
423 if (tree->type == EX_OP && tree->opval.op == IFX)
429 if ((csym = findSym (LabelTab, tree->trueLabel,
430 tree->trueLabel->name)))
431 tree->trueLabel = csym;
433 werrorfl (tree->filename, tree->lineno, E_LABEL_UNDEF,
434 tree->trueLabel->name);
437 if (tree->falseLabel)
439 if ((csym = findSym (LabelTab,
441 tree->falseLabel->name)))
442 tree->falseLabel = csym;
444 werrorfl (tree->filename, tree->lineno, E_LABEL_UNDEF,
445 tree->falseLabel->name);
450 /* if this is a label resolve it from the labelTab */
451 if (IS_AST_VALUE (tree) &&
452 tree->opval.val->sym &&
453 tree->opval.val->sym->islbl)
456 symbol *csym = findSym (LabelTab, tree->opval.val->sym,
457 tree->opval.val->sym->name);
460 werrorfl (tree->filename, tree->lineno, E_LABEL_UNDEF,
461 tree->opval.val->sym->name);
463 tree->opval.val->sym = csym;
465 goto resolveChildren;
468 /* do only for leafs */
469 if (IS_AST_VALUE (tree) &&
470 tree->opval.val->sym &&
471 !tree->opval.val->sym->implicit)
474 symbol *csym = findSymWithLevel (SymbolTab, tree->opval.val->sym);
476 /* if found in the symbol table & they r not the same */
477 if (csym && tree->opval.val->sym != csym)
479 tree->opval.val->sym = csym;
480 tree->opval.val->type = csym->type;
481 tree->opval.val->etype = csym->etype;
484 /* if not found in the symbol table */
485 /* mark it as undefined assume it is */
486 /* an integer in data space */
487 if (!csym && !tree->opval.val->sym->implicit)
490 /* if this is a function name then */
491 /* mark it as returning an int */
494 tree->opval.val->sym->type = newLink (DECLARATOR);
495 DCL_TYPE (tree->opval.val->sym->type) = FUNCTION;
496 tree->opval.val->sym->type->next =
497 tree->opval.val->sym->etype = newIntLink ();
498 tree->opval.val->etype = tree->opval.val->etype;
499 tree->opval.val->type = tree->opval.val->sym->type;
500 werrorfl (tree->filename, tree->lineno, W_IMPLICIT_FUNC,
501 tree->opval.val->sym->name);
502 //tree->opval.val->sym->undefined = 1;
503 allocVariables (tree->opval.val->sym);
507 tree->opval.val->sym->undefined = 1;
508 tree->opval.val->type =
509 tree->opval.val->etype = newIntLink ();
510 tree->opval.val->sym->type =
511 tree->opval.val->sym->etype = newIntLink ();
517 resolveSymbols (tree->left);
518 resolveSymbols (tree->right);
523 /*-----------------------------------------------------------------*/
524 /* setAstLineno - walks a ast tree & sets the line number */
525 /*-----------------------------------------------------------------*/
526 int setAstLineno (ast * tree, int lineno)
531 tree->lineno = lineno;
532 setAstLineno (tree->left, lineno);
533 setAstLineno (tree->right, lineno);
537 /*-----------------------------------------------------------------*/
538 /* funcOfType :- function of type with name */
539 /*-----------------------------------------------------------------*/
541 funcOfType (char *name, sym_link * type, sym_link * argType,
545 /* create the symbol */
546 sym = newSymbol (name, 0);
548 /* setup return value */
549 sym->type = newLink (DECLARATOR);
550 DCL_TYPE (sym->type) = FUNCTION;
551 sym->type->next = copyLinkChain (type);
552 sym->etype = getSpec (sym->type);
553 FUNC_ISREENT(sym->type) = rent ? 1 : 0;
555 /* if arguments required */
559 args = FUNC_ARGS(sym->type) = newValue ();
563 args->type = copyLinkChain (argType);
564 args->etype = getSpec (args->type);
565 SPEC_EXTR(args->etype)=1;
568 args = args->next = newValue ();
575 allocVariables (sym);
580 /*-----------------------------------------------------------------*/
581 /* funcOfTypeVarg :- function of type with name and argtype */
582 /*-----------------------------------------------------------------*/
584 funcOfTypeVarg (char *name, char * rtype, int nArgs , char **atypes)
589 /* create the symbol */
590 sym = newSymbol (name, 0);
592 /* setup return value */
593 sym->type = newLink (DECLARATOR);
594 DCL_TYPE (sym->type) = FUNCTION;
595 sym->type->next = typeFromStr(rtype);
596 sym->etype = getSpec (sym->type);
598 /* if arguments required */
601 args = FUNC_ARGS(sym->type) = newValue ();
603 for ( i = 0 ; i < nArgs ; i++ ) {
604 args->type = typeFromStr(atypes[i]);
605 args->etype = getSpec (args->type);
606 SPEC_EXTR(args->etype)=1;
607 if ((i + 1) == nArgs) break;
608 args = args->next = newValue ();
615 allocVariables (sym);
620 /*-----------------------------------------------------------------*/
621 /* reverseParms - will reverse a parameter tree */
622 /*-----------------------------------------------------------------*/
624 reverseParms (ast * ptree)
630 /* top down if we find a nonParm tree then quit */
631 if (ptree->type == EX_OP && ptree->opval.op == PARAM)
634 ptree->left = ptree->right;
635 ptree->right = ttree;
636 reverseParms (ptree->left);
637 reverseParms (ptree->right);
643 /*-----------------------------------------------------------------*/
644 /* processParms - makes sure the parameters are okay and do some */
645 /* processing with them */
646 /*-----------------------------------------------------------------*/
648 processParms (ast * func,
651 int *parmNumber, // unused, although updated
654 /* if none of them exist */
655 if (!defParm && !actParm)
659 if (getenv("DEBUG_SANITY")) {
660 fprintf (stderr, "processParms: %s ", defParm->name);
662 /* make sure the type is complete and sane */
663 checkTypeSanity(defParm->etype, defParm->name);
666 /* if the function is being called via a pointer & */
667 /* it has not been defined a reentrant then we cannot */
668 /* have parameters */
669 if (func->type != EX_VALUE && !IFFUNC_ISREENT (func->ftype) && !options.stackAuto)
671 werror (W_NONRENT_ARGS);
675 /* if defined parameters ended but actual parameters */
676 /* exist and this is not defined as a variable arg */
677 if (!defParm && actParm && !IFFUNC_HASVARARGS(func->ftype))
679 //if (func->type==EX_VALUE && func->opval.val->sym->undefined)
680 // return 1; /* Already gave them an undefined function error */
681 werror (E_TOO_MANY_PARMS);
685 /* if defined parameters present but no actual parameters */
686 if (defParm && !actParm)
688 werror (E_TOO_FEW_PARMS);
692 if (IS_VOID(actParm->ftype)) {
693 werror (E_VOID_VALUE_USED);
697 /* If this is a varargs function... */
698 if (!defParm && actParm && IFFUNC_HASVARARGS(func->ftype))
703 if (IS_CAST_OP (actParm)
704 || (IS_AST_LIT_VALUE (actParm) && actParm->values.literalFromCast))
706 /* Parameter was explicitly typecast; don't touch it. */
710 ftype = actParm->ftype;
712 /* If it's a small integer, upcast to int. */
713 if (IS_INTEGRAL (ftype)
714 && (getSize (ftype) < (unsigned) INTSIZE))
716 if (IS_AST_OP(actParm) &&
717 (actParm->opval.op == LEFT_OP ||
718 actParm->opval.op == '*' ||
719 actParm->opval.op == '+' ||
720 actParm->opval.op == '-') &&
722 // we should cast an operand instead of the result
723 actParm->decorated = 0;
724 actParm->left = newNode( CAST, newAst_LINK(newIntLink()),
726 actParm = decorateType(actParm);
728 newType = newAst_LINK(INTTYPE);
732 if (IS_PTR(ftype) && !IS_GENPTR(ftype))
734 newType = newAst_LINK (copyLinkChain(ftype));
735 DCL_TYPE (newType->opval.lnk) = port->unqualified_pointer;
738 if (IS_AGGREGATE (ftype))
740 newType = newAst_LINK (copyLinkChain (ftype));
741 DCL_TYPE (newType->opval.lnk) = port->unqualified_pointer;
745 /* cast required; change this op to a cast. */
746 ast *parmCopy = decorateType(resolveSymbols (copyAst (actParm)));
748 actParm->type = EX_OP;
749 actParm->opval.op = CAST;
750 actParm->left = newType;
751 actParm->right = parmCopy;
752 decorateType (actParm);
754 else if (actParm->type == EX_OP && actParm->opval.op == PARAM)
756 return (processParms (func, NULL, actParm->left, parmNumber, FALSE) ||
757 processParms (func, NULL, actParm->right, parmNumber, rightmost));
762 /* if defined parameters ended but actual has not & */
764 if (!defParm && actParm &&
765 (options.stackAuto || IFFUNC_ISREENT (func->ftype)))
768 resolveSymbols (actParm);
769 /* if this is a PARAM node then match left & right */
770 if (actParm->type == EX_OP && actParm->opval.op == PARAM)
772 return (processParms (func, defParm, actParm->left, parmNumber, FALSE) ||
773 processParms (func, defParm->next, actParm->right, parmNumber, rightmost));
777 /* If we have found a value node by following only right-hand links,
778 * then we know that there are no more values after us.
780 * Therefore, if there are more defined parameters, the caller didn't
783 if (rightmost && defParm->next)
785 werror (E_TOO_FEW_PARMS);
790 /* the parameter type must be at least castable */
791 if (compareType (defParm->type, actParm->ftype) == 0) {
792 werror (E_INCOMPAT_TYPES);
793 printFromToType (actParm->ftype, defParm->type);
797 /* if the parameter is castable then add the cast */
798 if (compareType (defParm->type, actParm->ftype) < 0)
800 ast *pTree = decorateType(resolveSymbols (copyAst (actParm)));
802 /* now change the current one to a cast */
803 actParm->type = EX_OP;
804 actParm->opval.op = CAST;
805 actParm->left = newAst_LINK (defParm->type);
806 actParm->right = pTree;
807 actParm->etype = defParm->etype;
808 actParm->ftype = defParm->type;
809 actParm->decorated=0; /* force typechecking */
810 decorateType (actParm);
813 /* make a copy and change the regparm type to the defined parm */
814 actParm->etype = getSpec (actParm->ftype = copyLinkChain (actParm->ftype));
815 SPEC_REGPARM (actParm->etype) = SPEC_REGPARM (defParm->etype);
816 SPEC_ARGREG (actParm->etype) = SPEC_ARGREG (defParm->etype);
820 /*-----------------------------------------------------------------*/
821 /* createIvalType - generates ival for basic types */
822 /*-----------------------------------------------------------------*/
824 createIvalType (ast * sym, sym_link * type, initList * ilist)
828 /* if initList is deep */
829 if (ilist->type == INIT_DEEP)
830 ilist = ilist->init.deep;
832 iExpr = decorateType (resolveSymbols (list2expr (ilist)));
833 return decorateType (newNode ('=', sym, iExpr));
836 /*-----------------------------------------------------------------*/
837 /* createIvalStruct - generates initial value for structures */
838 /*-----------------------------------------------------------------*/
840 createIvalStruct (ast * sym, sym_link * type, initList * ilist)
847 sflds = SPEC_STRUCT (type)->fields;
848 if (ilist->type != INIT_DEEP)
850 werror (E_INIT_STRUCT, "");
854 iloop = ilist->init.deep;
856 for (; sflds; sflds = sflds->next, iloop = (iloop ? iloop->next : NULL))
858 /* if we have come to end */
862 lAst = newNode (PTR_OP, newNode ('&', sym, NULL), newAst_VALUE (symbolVal (sflds)));
863 lAst = decorateType (resolveSymbols (lAst));
864 rast = decorateType (resolveSymbols (createIval (lAst, sflds->type, iloop, rast)));
868 werrorfl (filename, sym->opval.val->sym->lineDef,
869 W_EXCESS_INITIALIZERS, "struct",
870 sym->opval.val->sym->name);
877 /*-----------------------------------------------------------------*/
878 /* createIvalArray - generates code for array initialization */
879 /*-----------------------------------------------------------------*/
881 createIvalArray (ast * sym, sym_link * type, initList * ilist)
885 int lcnt = 0, size = 0;
886 literalList *literalL;
888 /* take care of the special case */
889 /* array of characters can be init */
891 if (IS_CHAR (type->next))
892 if ((rast = createIvalCharPtr (sym,
894 decorateType (resolveSymbols (list2expr (ilist))))))
896 return decorateType (resolveSymbols (rast));
898 /* not the special case */
899 if (ilist->type != INIT_DEEP)
901 werror (E_INIT_STRUCT, "");
905 iloop = ilist->init.deep;
906 lcnt = DCL_ELEM (type);
908 if (port->arrayInitializerSuppported && convertIListToConstList(ilist, &literalL))
912 aSym = decorateType (resolveSymbols(sym));
914 rast = newNode(ARRAYINIT, aSym, NULL);
915 rast->values.constlist = literalL;
917 // Make sure size is set to length of initializer list.
924 if (lcnt && size > lcnt)
926 // Array size was specified, and we have more initializers than needed.
927 char *name=sym->opval.val->sym->name;
928 int lineno=sym->opval.val->sym->lineDef;
930 werrorfl (filename, lineno, W_EXCESS_INITIALIZERS, "array", name);
939 aSym = newNode ('[', sym, newAst_VALUE (valueFromLit ((float) (size++))));
940 aSym = decorateType (resolveSymbols (aSym));
941 rast = createIval (aSym, type->next, iloop, rast);
942 iloop = (iloop ? iloop->next : NULL);
948 /* no of elements given and we */
949 /* have generated for all of them */
952 // there has to be a better way
953 char *name=sym->opval.val->sym->name;
954 int lineno=sym->opval.val->sym->lineDef;
955 werrorfl (filename, lineno, W_EXCESS_INITIALIZERS, "array", name);
962 /* if we have not been given a size */
963 if (!DCL_ELEM (type))
965 DCL_ELEM (type) = size;
968 return decorateType (resolveSymbols (rast));
972 /*-----------------------------------------------------------------*/
973 /* createIvalCharPtr - generates initial values for char pointers */
974 /*-----------------------------------------------------------------*/
976 createIvalCharPtr (ast * sym, sym_link * type, ast * iexpr)
980 /* if this is a pointer & right is a literal array then */
981 /* just assignment will do */
982 if (IS_PTR (type) && ((IS_LITERAL (iexpr->etype) ||
983 SPEC_SCLS (iexpr->etype) == S_CODE)
984 && IS_ARRAY (iexpr->ftype)))
985 return newNode ('=', sym, iexpr);
987 /* left side is an array so we have to assign each */
989 if ((IS_LITERAL (iexpr->etype) ||
990 SPEC_SCLS (iexpr->etype) == S_CODE)
991 && IS_ARRAY (iexpr->ftype))
993 /* for each character generate an assignment */
994 /* to the array element */
995 char *s = SPEC_CVAL (iexpr->etype).v_char;
997 int size = getSize (iexpr->ftype);
998 int symsize = getSize (type);
1002 if (size>(symsize+1))
1003 werrorfl (iexpr->filename, iexpr->lineno, W_EXCESS_INITIALIZERS,
1004 "string", sym->opval.val->sym->name);
1008 for (i=0;i<size;i++)
1010 rast = newNode (NULLOP,
1014 newAst_VALUE (valueFromLit ((float) i))),
1015 newAst_VALUE (valueFromLit (*s))));
1019 // now WE don't need iexpr's symbol anymore
1020 freeStringSymbol(AST_SYMBOL(iexpr));
1022 return decorateType (resolveSymbols (rast));
1028 /*-----------------------------------------------------------------*/
1029 /* createIvalPtr - generates initial value for pointers */
1030 /*-----------------------------------------------------------------*/
1032 createIvalPtr (ast * sym, sym_link * type, initList * ilist)
1038 if (ilist->type == INIT_DEEP)
1039 ilist = ilist->init.deep;
1041 iexpr = decorateType (resolveSymbols (list2expr (ilist)));
1043 /* if character pointer */
1044 if (IS_CHAR (type->next))
1045 if ((rast = createIvalCharPtr (sym, type, iexpr)))
1048 return newNode ('=', sym, iexpr);
1051 /*-----------------------------------------------------------------*/
1052 /* createIval - generates code for initial value */
1053 /*-----------------------------------------------------------------*/
1055 createIval (ast * sym, sym_link * type, initList * ilist, ast * wid)
1062 /* if structure then */
1063 if (IS_STRUCT (type))
1064 rast = createIvalStruct (sym, type, ilist);
1066 /* if this is a pointer */
1068 rast = createIvalPtr (sym, type, ilist);
1070 /* if this is an array */
1071 if (IS_ARRAY (type))
1072 rast = createIvalArray (sym, type, ilist);
1074 /* if type is SPECIFIER */
1076 rast = createIvalType (sym, type, ilist);
1079 return decorateType (resolveSymbols (newNode (NULLOP, wid, rast)));
1081 return decorateType (resolveSymbols (rast));
1084 /*-----------------------------------------------------------------*/
1085 /* initAggregates - initialises aggregate variables with initv */
1086 /*-----------------------------------------------------------------*/
1087 ast * initAggregates (symbol * sym, initList * ival, ast * wid) {
1088 return createIval (newAst_VALUE (symbolVal (sym)), sym->type, ival, wid);
1091 /*-----------------------------------------------------------------*/
1092 /* gatherAutoInit - creates assignment expressions for initial */
1094 /*-----------------------------------------------------------------*/
1096 gatherAutoInit (symbol * autoChain)
1103 for (sym = autoChain; sym; sym = sym->next)
1106 /* resolve the symbols in the ival */
1108 resolveIvalSym (sym->ival);
1110 /* if this is a static variable & has an */
1111 /* initial value the code needs to be lifted */
1112 /* here to the main portion since they can be */
1113 /* initialised only once at the start */
1114 if (IS_STATIC (sym->etype) && sym->ival &&
1115 SPEC_SCLS (sym->etype) != S_CODE)
1119 /* insert the symbol into the symbol table */
1120 /* with level = 0 & name = rname */
1121 newSym = copySymbol (sym);
1122 addSym (SymbolTab, newSym, newSym->rname, 0, 0, 1);
1124 /* now lift the code to main */
1125 if (IS_AGGREGATE (sym->type)) {
1126 work = initAggregates (sym, sym->ival, NULL);
1128 if (getNelements(sym->type, sym->ival)>1) {
1129 werrorfl (filename, sym->lineDef,
1130 W_EXCESS_INITIALIZERS, "scalar",
1133 work = newNode ('=', newAst_VALUE (symbolVal (newSym)),
1134 list2expr (sym->ival));
1137 setAstLineno (work, sym->lineDef);
1141 staticAutos = newNode (NULLOP, staticAutos, work);
1148 /* if there is an initial value */
1149 if (sym->ival && SPEC_SCLS (sym->etype) != S_CODE)
1151 initList *ilist=sym->ival;
1153 while (ilist->type == INIT_DEEP) {
1154 ilist = ilist->init.deep;
1157 /* update lineno for error msg */
1158 lineno=sym->lineDef;
1159 setAstLineno (ilist->init.node, lineno);
1161 if (IS_AGGREGATE (sym->type)) {
1162 work = initAggregates (sym, sym->ival, NULL);
1164 if (getNelements(sym->type, sym->ival)>1) {
1165 werrorfl (filename, sym->lineDef,
1166 W_EXCESS_INITIALIZERS, "scalar",
1169 work = newNode ('=', newAst_VALUE (symbolVal (sym)),
1170 list2expr (sym->ival));
1174 setAstLineno (work, sym->lineDef);
1178 init = newNode (NULLOP, init, work);
1187 /*-----------------------------------------------------------------*/
1188 /* freeStringSymbol - delete a literal string if no more usage */
1189 /*-----------------------------------------------------------------*/
1190 void freeStringSymbol(symbol *sym) {
1191 /* make sure this is a literal string */
1192 assert (sym->isstrlit);
1193 if (--sym->isstrlit == 0) { // lower the usage count
1194 memmap *segment=SPEC_OCLS(sym->etype);
1196 deleteSetItem(&segment->syms, sym);
1201 /*-----------------------------------------------------------------*/
1202 /* stringToSymbol - creates a symbol from a literal string */
1203 /*-----------------------------------------------------------------*/
1205 stringToSymbol (value * val)
1207 char name[SDCC_NAME_MAX + 1];
1208 static int charLbl = 0;
1213 // have we heard this before?
1214 for (sp=statsg->syms; sp; sp=sp->next) {
1216 size = getSize (sym->type);
1217 if (sym->isstrlit && size == getSize (val->type) &&
1218 !memcmp(SPEC_CVAL(sym->etype).v_char, SPEC_CVAL(val->etype).v_char, size)) {
1219 // yes, this is old news. Don't publish it again.
1220 sym->isstrlit++; // but raise the usage count
1221 return symbolVal(sym);
1225 SNPRINTF (name, sizeof(name), "_str_%d", charLbl++);
1226 sym = newSymbol (name, 0); /* make it @ level 0 */
1227 strncpyz (sym->rname, name, SDCC_NAME_MAX);
1229 /* copy the type from the value passed */
1230 sym->type = copyLinkChain (val->type);
1231 sym->etype = getSpec (sym->type);
1232 /* change to storage class & output class */
1233 SPEC_SCLS (sym->etype) = S_CODE;
1234 SPEC_CVAL (sym->etype).v_char = SPEC_CVAL (val->etype).v_char;
1235 SPEC_STAT (sym->etype) = 1;
1236 /* make the level & block = 0 */
1237 sym->block = sym->level = 0;
1239 /* create an ival */
1240 sym->ival = newiList (INIT_NODE, newAst_VALUE (val));
1245 allocVariables (sym);
1248 return symbolVal (sym);
1252 /*-----------------------------------------------------------------*/
1253 /* processBlockVars - will go thru the ast looking for block if */
1254 /* a block is found then will allocate the syms */
1255 /* will also gather the auto inits present */
1256 /*-----------------------------------------------------------------*/
1258 processBlockVars (ast * tree, int *stack, int action)
1263 /* if this is a block */
1264 if (tree->type == EX_OP && tree->opval.op == BLOCK)
1268 if (action == ALLOCATE)
1270 *stack += allocVariables (tree->values.sym);
1271 autoInit = gatherAutoInit (tree->values.sym);
1273 /* if there are auto inits then do them */
1275 tree->left = newNode (NULLOP, autoInit, tree->left);
1277 else /* action is deallocate */
1278 deallocLocal (tree->values.sym);
1281 processBlockVars (tree->left, stack, action);
1282 processBlockVars (tree->right, stack, action);
1287 /*-------------------------------------------------------------*/
1288 /* constExprTree - returns TRUE if this tree is a constant */
1290 /*-------------------------------------------------------------*/
1291 bool constExprTree (ast *cexpr) {
1297 cexpr = decorateType (resolveSymbols (cexpr));
1299 switch (cexpr->type)
1302 if (IS_AST_LIT_VALUE(cexpr)) {
1303 // this is a literal
1306 if (IS_AST_SYM_VALUE(cexpr) && IS_FUNC(AST_SYMBOL(cexpr)->type)) {
1307 // a function's address will never change
1310 if (IS_AST_SYM_VALUE(cexpr) && IS_ARRAY(AST_SYMBOL(cexpr)->type)) {
1311 // an array's address will never change
1314 if (IS_AST_SYM_VALUE(cexpr) &&
1315 IN_CODESPACE(SPEC_OCLS(AST_SYMBOL(cexpr)->etype))) {
1316 // a symbol in code space will never change
1317 // This is only for the 'char *s="hallo"' case and will have to leave
1318 //printf(" code space symbol");
1323 werror (E_INTERNAL_ERROR, __FILE__, __LINE__,
1324 "unexpected link in expression tree\n");
1327 if (cexpr->opval.op==ARRAYINIT) {
1328 // this is a list of literals
1331 if (cexpr->opval.op=='=') {
1332 return constExprTree(cexpr->right);
1334 if (cexpr->opval.op==CAST) {
1335 // cast ignored, maybe we should throw a warning here?
1336 return constExprTree(cexpr->right);
1338 if (cexpr->opval.op=='&') {
1341 if (cexpr->opval.op==CALL || cexpr->opval.op==PCALL) {
1344 if (constExprTree(cexpr->left) && constExprTree(cexpr->right)) {
1349 return IS_CONSTANT(operandType(cexpr->opval.oprnd));
1354 /*-----------------------------------------------------------------*/
1355 /* constExprValue - returns the value of a constant expression */
1356 /* or NULL if it is not a constant expression */
1357 /*-----------------------------------------------------------------*/
1359 constExprValue (ast * cexpr, int check)
1361 cexpr = decorateType (resolveSymbols (cexpr));
1363 /* if this is not a constant then */
1364 if (!IS_LITERAL (cexpr->ftype))
1366 /* then check if this is a literal array
1368 if (SPEC_SCLS (cexpr->etype) == S_CODE &&
1369 SPEC_CVAL (cexpr->etype).v_char &&
1370 IS_ARRAY (cexpr->ftype))
1372 value *val = valFromType (cexpr->ftype);
1373 SPEC_SCLS (val->etype) = S_LITERAL;
1374 val->sym = cexpr->opval.val->sym;
1375 val->sym->type = copyLinkChain (cexpr->ftype);
1376 val->sym->etype = getSpec (val->sym->type);
1377 strncpyz (val->name, cexpr->opval.val->sym->rname, SDCC_NAME_MAX);
1381 /* if we are casting a literal value then */
1382 if (IS_AST_OP (cexpr) &&
1383 cexpr->opval.op == CAST &&
1384 IS_LITERAL (cexpr->right->ftype))
1386 return valCastLiteral (cexpr->ftype,
1387 floatFromVal (cexpr->right->opval.val));
1390 if (IS_AST_VALUE (cexpr))
1392 return cexpr->opval.val;
1396 werror (E_CONST_EXPECTED, "found expression");
1401 /* return the value */
1402 return cexpr->opval.val;
1406 /*-----------------------------------------------------------------*/
1407 /* isLabelInAst - will return true if a given label is found */
1408 /*-----------------------------------------------------------------*/
1410 isLabelInAst (symbol * label, ast * tree)
1412 if (!tree || IS_AST_VALUE (tree) || IS_AST_LINK (tree))
1415 if (IS_AST_OP (tree) &&
1416 tree->opval.op == LABEL &&
1417 isSymbolEqual (AST_SYMBOL (tree->left), label))
1420 return isLabelInAst (label, tree->right) &&
1421 isLabelInAst (label, tree->left);
1425 /*-----------------------------------------------------------------*/
1426 /* isLoopCountable - return true if the loop count can be determi- */
1427 /* -ned at compile time . */
1428 /*-----------------------------------------------------------------*/
1430 isLoopCountable (ast * initExpr, ast * condExpr, ast * loopExpr,
1431 symbol ** sym, ast ** init, ast ** end)
1434 /* the loop is considered countable if the following
1435 conditions are true :-
1437 a) initExpr :- <sym> = <const>
1438 b) condExpr :- <sym> < <const1>
1439 c) loopExpr :- <sym> ++
1442 /* first check the initExpr */
1443 if (IS_AST_OP (initExpr) &&
1444 initExpr->opval.op == '=' && /* is assignment */
1445 IS_AST_SYM_VALUE (initExpr->left))
1446 { /* left is a symbol */
1448 *sym = AST_SYMBOL (initExpr->left);
1449 *init = initExpr->right;
1454 /* for now the symbol has to be of
1456 if (!IS_INTEGRAL ((*sym)->type))
1459 /* now check condExpr */
1460 if (IS_AST_OP (condExpr))
1463 switch (condExpr->opval.op)
1466 if (IS_AST_SYM_VALUE (condExpr->left) &&
1467 isSymbolEqual (*sym, AST_SYMBOL (condExpr->left)) &&
1468 IS_AST_LIT_VALUE (condExpr->right))
1470 *end = condExpr->right;
1476 if (IS_AST_OP (condExpr->left) &&
1477 condExpr->left->opval.op == '>' &&
1478 IS_AST_LIT_VALUE (condExpr->left->right) &&
1479 IS_AST_SYM_VALUE (condExpr->left->left) &&
1480 isSymbolEqual (*sym, AST_SYMBOL (condExpr->left->left)))
1483 *end = newNode ('+', condExpr->left->right,
1484 newAst_VALUE (constVal ("1")));
1495 /* check loop expression is of the form <sym>++ */
1496 if (!IS_AST_OP (loopExpr))
1499 /* check if <sym> ++ */
1500 if (loopExpr->opval.op == INC_OP)
1506 if (IS_AST_SYM_VALUE (loopExpr->left) &&
1507 isSymbolEqual (*sym, AST_SYMBOL (loopExpr->left)))
1514 if (IS_AST_SYM_VALUE (loopExpr->right) &&
1515 isSymbolEqual (*sym, AST_SYMBOL (loopExpr->right)))
1523 if (loopExpr->opval.op == ADD_ASSIGN)
1526 if (IS_AST_SYM_VALUE (loopExpr->left) &&
1527 isSymbolEqual (*sym, AST_SYMBOL (loopExpr->left)) &&
1528 IS_AST_LIT_VALUE (loopExpr->right) &&
1529 (int) AST_LIT_VALUE (loopExpr->right) != 1)
1537 /*-----------------------------------------------------------------*/
1538 /* astHasVolatile - returns true if ast contains any volatile */
1539 /*-----------------------------------------------------------------*/
1541 astHasVolatile (ast * tree)
1546 if (TETYPE (tree) && IS_VOLATILE (TETYPE (tree)))
1549 if (IS_AST_OP (tree))
1550 return astHasVolatile (tree->left) ||
1551 astHasVolatile (tree->right);
1556 /*-----------------------------------------------------------------*/
1557 /* astHasPointer - return true if the ast contains any ptr variable */
1558 /*-----------------------------------------------------------------*/
1560 astHasPointer (ast * tree)
1565 if (IS_AST_LINK (tree))
1568 /* if we hit an array expression then check
1569 only the left side */
1570 if (IS_AST_OP (tree) && tree->opval.op == '[')
1571 return astHasPointer (tree->left);
1573 if (IS_AST_VALUE (tree))
1574 return IS_PTR (tree->ftype) || IS_ARRAY (tree->ftype);
1576 return astHasPointer (tree->left) ||
1577 astHasPointer (tree->right);
1581 /*-----------------------------------------------------------------*/
1582 /* astHasSymbol - return true if the ast has the given symbol */
1583 /*-----------------------------------------------------------------*/
1585 astHasSymbol (ast * tree, symbol * sym)
1587 if (!tree || IS_AST_LINK (tree))
1590 if (IS_AST_VALUE (tree))
1592 if (IS_AST_SYM_VALUE (tree))
1593 return isSymbolEqual (AST_SYMBOL (tree), sym);
1598 return astHasSymbol (tree->left, sym) ||
1599 astHasSymbol (tree->right, sym);
1602 /*-----------------------------------------------------------------*/
1603 /* astHasDeref - return true if the ast has an indirect access */
1604 /*-----------------------------------------------------------------*/
1606 astHasDeref (ast * tree)
1608 if (!tree || IS_AST_LINK (tree) || IS_AST_VALUE(tree))
1611 if (tree->opval.op == '*' && tree->right == NULL) return TRUE;
1613 return astHasDeref (tree->left) || astHasDeref (tree->right);
1616 /*-----------------------------------------------------------------*/
1617 /* isConformingBody - the loop body has to conform to a set of rules */
1618 /* for the loop to be considered reversible read on for rules */
1619 /*-----------------------------------------------------------------*/
1621 isConformingBody (ast * pbody, symbol * sym, ast * body)
1624 /* we are going to do a pre-order traversal of the
1625 tree && check for the following conditions. (essentially
1626 a set of very shallow tests )
1627 a) the sym passed does not participate in
1628 any arithmetic operation
1629 b) There are no function calls
1630 c) all jumps are within the body
1631 d) address of loop control variable not taken
1632 e) if an assignment has a pointer on the
1633 left hand side make sure right does not have
1634 loop control variable */
1636 /* if we reach the end or a leaf then true */
1637 if (!pbody || IS_AST_LINK (pbody) || IS_AST_VALUE (pbody))
1640 /* if anything else is "volatile" */
1641 if (IS_VOLATILE (TETYPE (pbody)))
1644 /* we will walk the body in a pre-order traversal for
1646 switch (pbody->opval.op)
1648 /*------------------------------------------------------------------*/
1650 // if the loopvar is used as an index
1651 if (astHasSymbol(pbody->right, sym)) {
1654 return isConformingBody (pbody->right, sym, body);
1656 /*------------------------------------------------------------------*/
1661 /*------------------------------------------------------------------*/
1665 /* sure we are not sym is not modified */
1667 IS_AST_SYM_VALUE (pbody->left) &&
1668 isSymbolEqual (AST_SYMBOL (pbody->left), sym))
1672 IS_AST_SYM_VALUE (pbody->right) &&
1673 isSymbolEqual (AST_SYMBOL (pbody->right), sym))
1678 /*------------------------------------------------------------------*/
1680 case '*': /* can be unary : if right is null then unary operation */
1685 /* if right is NULL then unary operation */
1686 /*------------------------------------------------------------------*/
1687 /*----------------------------*/
1689 /*----------------------------*/
1692 if (IS_AST_SYM_VALUE (pbody->left) &&
1693 isSymbolEqual (AST_SYMBOL (pbody->left), sym))
1696 return isConformingBody (pbody->left, sym, body);
1700 if (astHasSymbol (pbody->left, sym) ||
1701 astHasSymbol (pbody->right, sym))
1706 /*------------------------------------------------------------------*/
1714 if (IS_AST_SYM_VALUE (pbody->left) &&
1715 isSymbolEqual (AST_SYMBOL (pbody->left), sym))
1718 if (IS_AST_SYM_VALUE (pbody->right) &&
1719 isSymbolEqual (AST_SYMBOL (pbody->right), sym))
1722 return isConformingBody (pbody->left, sym, body) &&
1723 isConformingBody (pbody->right, sym, body);
1731 if (IS_AST_SYM_VALUE (pbody->left) &&
1732 isSymbolEqual (AST_SYMBOL (pbody->left), sym))
1734 return isConformingBody (pbody->left, sym, body);
1736 /*------------------------------------------------------------------*/
1748 case SIZEOF: /* evaluate wihout code generation */
1750 if (IS_AST_SYM_VALUE (pbody->left) &&
1751 isSymbolEqual (AST_SYMBOL (pbody->left), sym))
1754 if (IS_AST_SYM_VALUE (pbody->right) &&
1755 isSymbolEqual (AST_SYMBOL (pbody->right), sym))
1758 return isConformingBody (pbody->left, sym, body) &&
1759 isConformingBody (pbody->right, sym, body);
1761 /*------------------------------------------------------------------*/
1764 /* if left has a pointer & right has loop
1765 control variable then we cannot */
1766 if (astHasPointer (pbody->left) &&
1767 astHasSymbol (pbody->right, sym))
1769 if (astHasVolatile (pbody->left))
1772 if (IS_AST_SYM_VALUE (pbody->left)) {
1773 // if the loopvar has an assignment
1774 if (isSymbolEqual (AST_SYMBOL (pbody->left), sym))
1776 // if the loopvar is used in another (maybe conditional) block
1777 if (astHasSymbol (pbody->right, sym) &&
1778 (pbody->level >= body->level)) {
1783 if (astHasVolatile (pbody->left))
1786 if (astHasDeref(pbody->right)) return FALSE;
1788 return isConformingBody (pbody->left, sym, body) &&
1789 isConformingBody (pbody->right, sym, body);
1800 assert ("Parser should not have generated this\n");
1802 /*------------------------------------------------------------------*/
1803 /*----------------------------*/
1804 /* comma operator */
1805 /*----------------------------*/
1807 return isConformingBody (pbody->left, sym, body) &&
1808 isConformingBody (pbody->right, sym, body);
1810 /*------------------------------------------------------------------*/
1811 /*----------------------------*/
1813 /*----------------------------*/
1815 /* if local & not passed as paramater then ok */
1816 if (sym->level && !astHasSymbol(pbody->right,sym))
1820 /*------------------------------------------------------------------*/
1821 /*----------------------------*/
1822 /* return statement */
1823 /*----------------------------*/
1828 if (isLabelInAst (AST_SYMBOL (pbody->left), body))
1833 if (astHasSymbol (pbody->left, sym))
1840 return isConformingBody (pbody->left, sym, body) &&
1841 isConformingBody (pbody->right, sym, body);
1847 /*-----------------------------------------------------------------*/
1848 /* isLoopReversible - takes a for loop as input && returns true */
1849 /* if the for loop is reversible. If yes will set the value of */
1850 /* the loop control var & init value & termination value */
1851 /*-----------------------------------------------------------------*/
1853 isLoopReversible (ast * loop, symbol ** loopCntrl,
1854 ast ** init, ast ** end)
1856 /* if option says don't do it then don't */
1857 if (optimize.noLoopReverse)
1859 /* there are several tests to determine this */
1861 /* for loop has to be of the form
1862 for ( <sym> = <const1> ;
1863 [<sym> < <const2>] ;
1864 [<sym>++] | [<sym> += 1] | [<sym> = <sym> + 1] )
1866 if (!isLoopCountable (AST_FOR (loop, initExpr),
1867 AST_FOR (loop, condExpr),
1868 AST_FOR (loop, loopExpr),
1869 loopCntrl, init, end))
1872 /* now do some serious checking on the body of the loop
1875 return isConformingBody (loop->left, *loopCntrl, loop->left);
1879 /*-----------------------------------------------------------------*/
1880 /* replLoopSym - replace the loop sym by loop sym -1 */
1881 /*-----------------------------------------------------------------*/
1883 replLoopSym (ast * body, symbol * sym)
1886 if (!body || IS_AST_LINK (body))
1889 if (IS_AST_SYM_VALUE (body))
1892 if (isSymbolEqual (AST_SYMBOL (body), sym))
1896 body->opval.op = '-';
1897 body->left = newAst_VALUE (symbolVal (sym));
1898 body->right = newAst_VALUE (constVal ("1"));
1906 replLoopSym (body->left, sym);
1907 replLoopSym (body->right, sym);
1911 /*-----------------------------------------------------------------*/
1912 /* reverseLoop - do the actual loop reversal */
1913 /*-----------------------------------------------------------------*/
1915 reverseLoop (ast * loop, symbol * sym, ast * init, ast * end)
1919 /* create the following tree
1924 if (sym) goto for_continue ;
1927 /* put it together piece by piece */
1928 rloop = newNode (NULLOP,
1929 createIf (newAst_VALUE (symbolVal (sym)),
1931 newAst_VALUE (symbolVal (AST_FOR (loop, continueLabel))),
1934 newAst_VALUE (symbolVal (sym)),
1937 replLoopSym (loop->left, sym);
1938 setAstLineno (rloop, init->lineno);
1940 rloop = newNode (NULLOP,
1942 newAst_VALUE (symbolVal (sym)),
1943 newNode ('-', end, init)),
1944 createLabel (AST_FOR (loop, continueLabel),
1948 newNode (SUB_ASSIGN,
1949 newAst_VALUE (symbolVal (sym)),
1950 newAst_VALUE (constVal ("1"))),
1953 rloop->lineno=init->lineno;
1954 return decorateType (rloop);
1958 /*-----------------------------------------------------------------*/
1959 /* searchLitOp - search tree (*ops only) for an ast with literal */
1960 /*-----------------------------------------------------------------*/
1962 searchLitOp (ast *tree, ast **parent, const char *ops)
1966 if (tree && optimize.global_cse)
1968 /* is there a literal operand? */
1970 IS_AST_OP(tree->right) &&
1971 tree->right->right &&
1972 (tree->right->opval.op == ops[0] || tree->right->opval.op == ops[1]))
1974 if (IS_LITERAL (RTYPE (tree->right)) ^
1975 IS_LITERAL (LTYPE (tree->right)))
1977 tree->right->decorated = 0;
1978 tree->decorated = 0;
1982 ret = searchLitOp (tree->right, parent, ops);
1987 IS_AST_OP(tree->left) &&
1988 tree->left->right &&
1989 (tree->left->opval.op == ops[0] || tree->left->opval.op == ops[1]))
1991 if (IS_LITERAL (RTYPE (tree->left)) ^
1992 IS_LITERAL (LTYPE (tree->left)))
1994 tree->left->decorated = 0;
1995 tree->decorated = 0;
1999 ret = searchLitOp (tree->left, parent, ops);
2007 /*-----------------------------------------------------------------*/
2008 /* decorateType - compute type for this tree also does type checking */
2009 /* this is done bottom up, since type have to flow upwards */
2010 /* it also does constant folding, and paramater checking */
2011 /*-----------------------------------------------------------------*/
2013 decorateType (ast * tree)
2021 /* if already has type then do nothing */
2022 if (tree->decorated)
2025 tree->decorated = 1;
2028 /* print the line */
2029 /* if not block & function */
2030 if (tree->type == EX_OP &&
2031 (tree->opval.op != FUNCTION &&
2032 tree->opval.op != BLOCK &&
2033 tree->opval.op != NULLOP))
2035 filename = tree->filename;
2036 lineno = tree->lineno;
2040 /* if any child is an error | this one is an error do nothing */
2041 if (tree->isError ||
2042 (tree->left && tree->left->isError) ||
2043 (tree->right && tree->right->isError))
2046 /*------------------------------------------------------------------*/
2047 /*----------------------------*/
2048 /* leaf has been reached */
2049 /*----------------------------*/
2050 lineno=tree->lineno;
2051 /* if this is of type value */
2052 /* just get the type */
2053 if (tree->type == EX_VALUE)
2056 if (IS_LITERAL (tree->opval.val->etype))
2059 /* if this is a character array then declare it */
2060 if (IS_ARRAY (tree->opval.val->type))
2061 tree->opval.val = stringToSymbol (tree->opval.val);
2063 /* otherwise just copy the type information */
2064 COPYTYPE (TTYPE (tree), TETYPE (tree), tree->opval.val->type);
2068 if (tree->opval.val->sym)
2070 /* if the undefined flag is set then give error message */
2071 if (tree->opval.val->sym->undefined)
2073 werror (E_ID_UNDEF, tree->opval.val->sym->name);
2075 TTYPE (tree) = TETYPE (tree) =
2076 tree->opval.val->type = tree->opval.val->sym->type =
2077 tree->opval.val->etype = tree->opval.val->sym->etype =
2078 copyLinkChain (INTTYPE);
2083 /* if impilicit i.e. struct/union member then no type */
2084 if (tree->opval.val->sym->implicit)
2085 TTYPE (tree) = TETYPE (tree) = NULL;
2090 /* else copy the type */
2091 COPYTYPE (TTYPE (tree), TETYPE (tree), tree->opval.val->type);
2093 /* and mark it as referenced */
2094 tree->opval.val->sym->isref = 1;
2102 /* if type link for the case of cast */
2103 if (tree->type == EX_LINK)
2105 COPYTYPE (TTYPE (tree), TETYPE (tree), tree->opval.lnk);
2113 if (tree->opval.op == NULLOP || tree->opval.op == BLOCK)
2115 if (tree->left && tree->left->type == EX_OPERAND
2116 && (tree->left->opval.op == INC_OP
2117 || tree->left->opval.op == DEC_OP)
2118 && tree->left->left)
2120 tree->left->right = tree->left->left;
2121 tree->left->left = NULL;
2123 if (tree->right && tree->right->type == EX_OPERAND
2124 && (tree->right->opval.op == INC_OP
2125 || tree->right->opval.op == DEC_OP)
2126 && tree->right->left)
2128 tree->right->right = tree->right->left;
2129 tree->right->left = NULL;
2134 dtl = decorateType (tree->left);
2135 /* delay right side for '?' operator since conditional macro expansions might
2137 dtr = (tree->opval.op == '?' ? tree->right : decorateType (tree->right));
2139 /* this is to take care of situations
2140 when the tree gets rewritten */
2141 if (dtl != tree->left)
2143 if (dtr != tree->right)
2145 if ((dtl && dtl->isError) || (dtr && dtr->isError))
2148 if (IS_AST_OP(tree) &&
2149 (tree->opval.op == CAST || tree->opval.op == '=') &&
2150 (getSize(LTYPE(tree)) > getSize(RTYPE(tree))) &&
2151 (getSize(RTYPE(tree)) < (unsigned) INTSIZE)) {
2152 // this is a cast/assign to a bigger type
2153 if (IS_AST_OP(tree->right) &&
2154 IS_INTEGRAL(tree->right->ftype) &&
2155 (tree->right->opval.op == LEFT_OP ||
2156 tree->right->opval.op == '*' ||
2157 tree->right->opval.op == '+' ||
2158 tree->right->opval.op == '-') &&
2159 tree->right->right) {
2160 // we should cast an operand instead of the result
2161 tree->right->decorated = 0;
2162 tree->right->left = newNode( CAST, newAst_LINK(newIntLink()),
2164 tree->right = decorateType(tree->right);
2169 /* depending on type of operator do */
2171 switch (tree->opval.op)
2173 /*------------------------------------------------------------------*/
2174 /*----------------------------*/
2176 /*----------------------------*/
2179 /* determine which is the array & which the index */
2180 if ((IS_ARRAY (RTYPE (tree)) || IS_PTR (RTYPE (tree))) && IS_INTEGRAL (LTYPE (tree)))
2183 ast *tempTree = tree->left;
2184 tree->left = tree->right;
2185 tree->right = tempTree;
2188 /* first check if this is a array or a pointer */
2189 if ((!IS_ARRAY (LTYPE (tree))) && (!IS_PTR (LTYPE (tree))))
2191 werror (E_NEED_ARRAY_PTR, "[]");
2192 goto errorTreeReturn;
2195 /* check if the type of the idx */
2196 if (!IS_INTEGRAL (RTYPE (tree)))
2198 werror (E_IDX_NOT_INT);
2199 goto errorTreeReturn;
2202 /* if the left is an rvalue then error */
2205 werror (E_LVALUE_REQUIRED, "array access");
2206 goto errorTreeReturn;
2209 COPYTYPE (TTYPE (tree), TETYPE (tree), LTYPE (tree)->next);
2212 /*------------------------------------------------------------------*/
2213 /*----------------------------*/
2215 /*----------------------------*/
2217 /* if this is not a structure */
2218 if (!IS_STRUCT (LTYPE (tree)))
2220 werror (E_STRUCT_UNION, ".");
2221 goto errorTreeReturn;
2223 TTYPE (tree) = structElemType (LTYPE (tree),
2224 (tree->right->type == EX_VALUE ?
2225 tree->right->opval.val : NULL));
2226 TETYPE (tree) = getSpec (TTYPE (tree));
2229 /*------------------------------------------------------------------*/
2230 /*----------------------------*/
2231 /* struct/union pointer */
2232 /*----------------------------*/
2234 /* if not pointer to a structure */
2235 if (!IS_PTR (LTYPE (tree)) && !IS_ARRAY (LTYPE(tree)))
2237 werror (E_PTR_REQD);
2238 goto errorTreeReturn;
2241 if (!IS_STRUCT (LTYPE (tree)->next))
2243 werror (E_STRUCT_UNION, "->");
2244 goto errorTreeReturn;
2247 TTYPE (tree) = structElemType (LTYPE (tree)->next,
2248 (tree->right->type == EX_VALUE ?
2249 tree->right->opval.val : NULL));
2250 TETYPE (tree) = getSpec (TTYPE (tree));
2252 /* adjust the storage class */
2253 switch (DCL_TYPE(tree->left->ftype)) {
2255 SPEC_SCLS(TETYPE(tree)) = S_DATA;
2258 SPEC_SCLS(TETYPE(tree)) = S_XDATA;
2261 SPEC_SCLS(TETYPE(tree)) = S_CODE;
2264 SPEC_SCLS (TETYPE (tree)) = 0;
2267 SPEC_SCLS(TETYPE(tree)) = S_XSTACK;
2270 SPEC_SCLS(TETYPE(tree)) = S_IDATA;
2273 SPEC_SCLS(TETYPE(tree)) = S_EEPROM;
2276 SPEC_SCLS (TETYPE (tree)) = 0;
2283 /* This breaks with extern declarations, bitfields, and perhaps other */
2284 /* cases (gcse). Let's leave this optimization disabled for now and */
2285 /* ponder if there's a safe way to do this. -- EEP */
2287 if (IS_ADDRESS_OF_OP (tree->left) && IS_AST_SYM_VALUE(tree->left->left)
2288 && SPEC_ABSA (AST_SYMBOL (tree->left->left)->etype))
2290 /* If defined struct type at addr var
2291 then rewrite (&struct var)->member
2293 and define membertype at (addr+offsetof(struct var,member)) temp
2296 symbol *element = getStructElement (SPEC_STRUCT (LETYPE(tree)),
2297 AST_SYMBOL(tree->right));
2299 sym = newSymbol(genSymName (0), 0);
2300 sym->type = TTYPE (tree);
2301 sym->etype = getSpec(sym->type);
2302 sym->lineDef = tree->lineno;
2305 SPEC_STAT (sym->etype) = 1;
2306 SPEC_ADDR (sym->etype) = SPEC_ADDR (AST_SYMBOL (tree->left->left)->etype)
2308 SPEC_ABSA(sym->etype) = 1;
2309 addSym (SymbolTab, sym, sym->name, 0, 0, 0);
2312 AST_VALUE (tree) = symbolVal(sym);
2315 tree->type = EX_VALUE;
2323 /*------------------------------------------------------------------*/
2324 /*----------------------------*/
2325 /* ++/-- operation */
2326 /*----------------------------*/
2330 sym_link *ltc = (tree->right ? RTYPE (tree) : LTYPE (tree));
2331 COPYTYPE (TTYPE (tree), TETYPE (tree), ltc);
2332 if (!tree->initMode && IS_CONSTANT(TTYPE(tree)))
2333 werror (E_CODE_WRITE, tree->opval.op==INC_OP ? "++" : "--");
2342 /*------------------------------------------------------------------*/
2343 /*----------------------------*/
2345 /*----------------------------*/
2346 case '&': /* can be unary */
2347 /* if right is NULL then unary operation */
2348 if (tree->right) /* not an unary operation */
2351 if (!IS_INTEGRAL (LTYPE (tree)) || !IS_INTEGRAL (RTYPE (tree)))
2353 werror (E_BITWISE_OP);
2354 werror (W_CONTINUE, "left & right types are ");
2355 printTypeChain (LTYPE (tree), stderr);
2356 fprintf (stderr, ",");
2357 printTypeChain (RTYPE (tree), stderr);
2358 fprintf (stderr, "\n");
2359 goto errorTreeReturn;
2362 /* if they are both literal */
2363 if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
2365 tree->type = EX_VALUE;
2366 tree->opval.val = valBitwise (valFromType (LETYPE (tree)),
2367 valFromType (RETYPE (tree)), '&');
2369 tree->right = tree->left = NULL;
2370 TETYPE (tree) = tree->opval.val->etype;
2371 TTYPE (tree) = tree->opval.val->type;
2375 /* see if this is a GETHBIT operation if yes
2378 ast *otree = optimizeGetHbit (tree);
2381 return decorateType (otree);
2385 computeType (LTYPE (tree), RTYPE (tree), FALSE);
2386 TETYPE (tree) = getSpec (TTYPE (tree));
2388 /* if left is a literal exchange left & right */
2389 if (IS_LITERAL (LTYPE (tree)))
2391 ast *tTree = tree->left;
2392 tree->left = tree->right;
2393 tree->right = tTree;
2396 /* if right is a literal and */
2397 /* we can find a 2nd literal in a and-tree then */
2398 /* rearrange the tree */
2399 if (IS_LITERAL (RTYPE (tree)))
2402 ast *litTree = searchLitOp (tree, &parent, "&");
2405 ast *tTree = litTree->left;
2406 litTree->left = tree->right;
2407 tree->right = tTree;
2408 /* both operands in tTree are literal now */
2409 decorateType (parent);
2413 LRVAL (tree) = RRVAL (tree) = 1;
2417 /*------------------------------------------------------------------*/
2418 /*----------------------------*/
2420 /*----------------------------*/
2421 p = newLink (DECLARATOR);
2422 /* if bit field then error */
2423 if (IS_BITVAR (tree->left->etype))
2425 werror (E_ILLEGAL_ADDR, "address of bit variable");
2426 goto errorTreeReturn;
2429 if (LETYPE(tree) && SPEC_SCLS (tree->left->etype) == S_REGISTER)
2431 werror (E_ILLEGAL_ADDR, "address of register variable");
2432 goto errorTreeReturn;
2435 if (IS_FUNC (LTYPE (tree)))
2437 // this ought to be ignored
2438 return (tree->left);
2441 if (IS_LITERAL(LTYPE(tree)))
2443 werror (E_ILLEGAL_ADDR, "address of literal");
2444 goto errorTreeReturn;
2449 werror (E_LVALUE_REQUIRED, "address of");
2450 goto errorTreeReturn;
2453 DCL_TYPE (p) = POINTER;
2454 else if (SPEC_SCLS (tree->left->etype) == S_CODE)
2455 DCL_TYPE (p) = CPOINTER;
2456 else if (SPEC_SCLS (tree->left->etype) == S_XDATA)
2457 DCL_TYPE (p) = FPOINTER;
2458 else if (SPEC_SCLS (tree->left->etype) == S_XSTACK)
2459 DCL_TYPE (p) = PPOINTER;
2460 else if (SPEC_SCLS (tree->left->etype) == S_IDATA)
2461 DCL_TYPE (p) = IPOINTER;
2462 else if (SPEC_SCLS (tree->left->etype) == S_EEPROM)
2463 DCL_TYPE (p) = EEPPOINTER;
2464 else if (SPEC_OCLS(tree->left->etype))
2465 DCL_TYPE (p) = PTR_TYPE(SPEC_OCLS(tree->left->etype));
2467 DCL_TYPE (p) = POINTER;
2469 if (IS_AST_SYM_VALUE (tree->left))
2471 AST_SYMBOL (tree->left)->addrtaken = 1;
2472 AST_SYMBOL (tree->left)->allocreq = 1;
2475 p->next = LTYPE (tree);
2477 TETYPE (tree) = getSpec (TTYPE (tree));
2482 if (IS_AST_OP (tree->left) && tree->left->opval.op == PTR_OP
2483 && IS_AST_VALUE (tree->left->left) && !IS_AST_SYM_VALUE (tree->left->left))
2485 symbol *element = getStructElement (SPEC_STRUCT (LETYPE(tree->left)),
2486 AST_SYMBOL(tree->left->right));
2487 AST_VALUE(tree) = valPlus(AST_VALUE(tree->left->left),
2488 valueFromLit(element->offset));
2491 tree->type = EX_VALUE;
2492 tree->values.literalFromCast = 1;
2498 /*------------------------------------------------------------------*/
2499 /*----------------------------*/
2501 /*----------------------------*/
2503 /* if the rewrite succeeds then don't go any furthur */
2505 ast *wtree = optimizeRRCRLC (tree);
2507 return decorateType (wtree);
2509 wtree = optimizeSWAP (tree);
2511 return decorateType (wtree);
2514 /* if left is a literal exchange left & right */
2515 if (IS_LITERAL (LTYPE (tree)))
2517 ast *tTree = tree->left;
2518 tree->left = tree->right;
2519 tree->right = tTree;
2522 /* if right is a literal and */
2523 /* we can find a 2nd literal in a or-tree then */
2524 /* rearrange the tree */
2525 if (IS_LITERAL (RTYPE (tree)))
2528 ast *litTree = searchLitOp (tree, &parent, "|");
2531 ast *tTree = litTree->left;
2532 litTree->left = tree->right;
2533 tree->right = tTree;
2534 /* both operands in tTree are literal now */
2535 decorateType (parent);
2540 /*------------------------------------------------------------------*/
2541 /*----------------------------*/
2543 /*----------------------------*/
2545 if (!IS_INTEGRAL (LTYPE (tree)) || !IS_INTEGRAL (RTYPE (tree)))
2547 werror (E_BITWISE_OP);
2548 werror (W_CONTINUE, "left & right types are ");
2549 printTypeChain (LTYPE (tree), stderr);
2550 fprintf (stderr, ",");
2551 printTypeChain (RTYPE (tree), stderr);
2552 fprintf (stderr, "\n");
2553 goto errorTreeReturn;
2556 /* if they are both literal then */
2557 /* rewrite the tree */
2558 if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
2560 tree->type = EX_VALUE;
2561 tree->opval.val = valBitwise (valFromType (LETYPE (tree)),
2562 valFromType (RETYPE (tree)),
2564 tree->right = tree->left = NULL;
2565 TETYPE (tree) = tree->opval.val->etype;
2566 TTYPE (tree) = tree->opval.val->type;
2570 /* if left is a literal exchange left & right */
2571 if (IS_LITERAL (LTYPE (tree)))
2573 ast *tTree = tree->left;
2574 tree->left = tree->right;
2575 tree->right = tTree;
2578 /* if right is a literal and */
2579 /* we can find a 2nd literal in a xor-tree then */
2580 /* rearrange the tree */
2581 if (IS_LITERAL (RTYPE (tree)) &&
2582 tree->opval.op == '^') /* the same source is used by 'bitwise or' */
2585 ast *litTree = searchLitOp (tree, &parent, "^");
2588 ast *tTree = litTree->left;
2589 litTree->left = tree->right;
2590 tree->right = tTree;
2591 /* both operands in litTree are literal now */
2592 decorateType (parent);
2596 LRVAL (tree) = RRVAL (tree) = 1;
2597 TETYPE (tree) = getSpec (TTYPE (tree) =
2598 computeType (LTYPE (tree),
2604 /*------------------------------------------------------------------*/
2605 /*----------------------------*/
2607 /*----------------------------*/
2609 if (!IS_ARITHMETIC (LTYPE (tree)) || !IS_ARITHMETIC (RTYPE (tree)))
2611 werror (E_INVALID_OP, "divide");
2612 goto errorTreeReturn;
2614 /* if they are both literal then */
2615 /* rewrite the tree */
2616 if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
2618 tree->type = EX_VALUE;
2619 tree->opval.val = valDiv (valFromType (LETYPE (tree)),
2620 valFromType (RETYPE (tree)));
2621 tree->right = tree->left = NULL;
2622 TETYPE (tree) = getSpec (TTYPE (tree) =
2623 tree->opval.val->type);
2627 LRVAL (tree) = RRVAL (tree) = 1;
2628 TETYPE (tree) = getSpec (TTYPE (tree) =
2629 computeType (LTYPE (tree),
2633 /* if right is a literal and */
2634 /* left is also a division by a literal then */
2635 /* rearrange the tree */
2636 if (IS_LITERAL (RTYPE (tree))
2637 /* avoid infinite loop */
2638 && (TYPE_UDWORD) floatFromVal (tree->right->opval.val) != 1)
2641 ast *litTree = searchLitOp (tree, &parent, "/");
2644 if (IS_LITERAL (RTYPE (litTree)))
2647 litTree->right = newNode ('*', litTree->right, tree->right);
2648 litTree->right->lineno = tree->lineno;
2650 tree->right->opval.val = constVal ("1");
2651 decorateType (parent);
2655 /* litTree->left is literal: no gcse possible.
2656 We can't call decorateType(parent), because
2657 this would cause an infinit loop. */
2658 parent->decorated = 1;
2659 decorateType (litTree);
2666 /*------------------------------------------------------------------*/
2667 /*----------------------------*/
2669 /*----------------------------*/
2671 if (!IS_INTEGRAL (LTYPE (tree)) || !IS_INTEGRAL (RTYPE (tree)))
2673 werror (E_BITWISE_OP);
2674 werror (W_CONTINUE, "left & right types are ");
2675 printTypeChain (LTYPE (tree), stderr);
2676 fprintf (stderr, ",");
2677 printTypeChain (RTYPE (tree), stderr);
2678 fprintf (stderr, "\n");
2679 goto errorTreeReturn;
2681 /* if they are both literal then */
2682 /* rewrite the tree */
2683 if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
2685 tree->type = EX_VALUE;
2686 tree->opval.val = valMod (valFromType (LETYPE (tree)),
2687 valFromType (RETYPE (tree)));
2688 tree->right = tree->left = NULL;
2689 TETYPE (tree) = getSpec (TTYPE (tree) =
2690 tree->opval.val->type);
2693 LRVAL (tree) = RRVAL (tree) = 1;
2694 TETYPE (tree) = getSpec (TTYPE (tree) =
2695 computeType (LTYPE (tree),
2700 /*------------------------------------------------------------------*/
2701 /*----------------------------*/
2702 /* address dereference */
2703 /*----------------------------*/
2704 case '*': /* can be unary : if right is null then unary operation */
2707 if (!IS_PTR (LTYPE (tree)) && !IS_ARRAY (LTYPE (tree)))
2709 werror (E_PTR_REQD);
2710 goto errorTreeReturn;
2715 werror (E_LVALUE_REQUIRED, "pointer deref");
2716 goto errorTreeReturn;
2718 if (IS_ADDRESS_OF_OP(tree->left))
2720 /* replace *&obj with obj */
2721 return tree->left->left;
2723 TTYPE (tree) = copyLinkChain (LTYPE (tree)->next);
2724 TETYPE (tree) = getSpec (TTYPE (tree));
2725 /* adjust the storage class */
2726 switch (DCL_TYPE(tree->left->ftype)) {
2728 SPEC_SCLS(TETYPE(tree)) = S_DATA;
2731 SPEC_SCLS(TETYPE(tree)) = S_XDATA;
2734 SPEC_SCLS(TETYPE(tree)) = S_CODE;
2737 SPEC_SCLS (TETYPE (tree)) = 0;
2740 SPEC_SCLS(TETYPE(tree)) = S_XSTACK;
2743 SPEC_SCLS(TETYPE(tree)) = S_IDATA;
2746 SPEC_SCLS(TETYPE(tree)) = S_EEPROM;
2749 SPEC_SCLS (TETYPE (tree)) = 0;
2758 /*------------------------------------------------------------------*/
2759 /*----------------------------*/
2760 /* multiplication */
2761 /*----------------------------*/
2762 if (!IS_ARITHMETIC (LTYPE (tree)) || !IS_ARITHMETIC (RTYPE (tree)))
2764 werror (E_INVALID_OP, "multiplication");
2765 goto errorTreeReturn;
2768 /* if they are both literal then */
2769 /* rewrite the tree */
2770 if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
2772 tree->type = EX_VALUE;
2773 tree->opval.val = valMult (valFromType (LETYPE (tree)),
2774 valFromType (RETYPE (tree)));
2775 tree->right = tree->left = NULL;
2776 TETYPE (tree) = getSpec (TTYPE (tree) =
2777 tree->opval.val->type);
2781 /* if left is a literal exchange left & right */
2782 if (IS_LITERAL (LTYPE (tree)))
2784 ast *tTree = tree->left;
2785 tree->left = tree->right;
2786 tree->right = tTree;
2789 /* if right is a literal and */
2790 /* we can find a 2nd literal in a mul-tree then */
2791 /* rearrange the tree */
2792 if (IS_LITERAL (RTYPE (tree)))
2795 ast *litTree = searchLitOp (tree, &parent, "*");
2798 ast *tTree = litTree->left;
2799 litTree->left = tree->right;
2800 tree->right = tTree;
2801 /* both operands in litTree are literal now */
2802 decorateType (parent);
2806 LRVAL (tree) = RRVAL (tree) = 1;
2807 TETYPE (tree) = getSpec (TTYPE (tree) =
2808 computeType (LTYPE (tree),
2814 /*------------------------------------------------------------------*/
2815 /*----------------------------*/
2816 /* unary '+' operator */
2817 /*----------------------------*/
2822 if (!IS_ARITHMETIC (LTYPE (tree)))
2824 werror (E_UNARY_OP, '+');
2825 goto errorTreeReturn;
2828 /* if left is a literal then do it */
2829 if (IS_LITERAL (LTYPE (tree)))
2831 tree->type = EX_VALUE;
2832 tree->opval.val = valFromType (LETYPE (tree));
2834 TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
2838 COPYTYPE (TTYPE (tree), TETYPE (tree), LTYPE (tree));
2842 /*------------------------------------------------------------------*/
2843 /*----------------------------*/
2845 /*----------------------------*/
2847 /* this is not a unary operation */
2848 /* if both pointers then problem */
2849 if ((IS_PTR (LTYPE (tree)) || IS_ARRAY (LTYPE (tree))) &&
2850 (IS_PTR (RTYPE (tree)) || IS_ARRAY (RTYPE (tree))))
2852 werror (E_PTR_PLUS_PTR);
2853 goto errorTreeReturn;
2856 if (!IS_ARITHMETIC (LTYPE (tree)) &&
2857 !IS_PTR (LTYPE (tree)) && !IS_ARRAY (LTYPE (tree)))
2859 werror (E_PLUS_INVALID, "+");
2860 goto errorTreeReturn;
2863 if (!IS_ARITHMETIC (RTYPE (tree)) &&
2864 !IS_PTR (RTYPE (tree)) && !IS_ARRAY (RTYPE (tree)))
2866 werror (E_PLUS_INVALID, "+");
2867 goto errorTreeReturn;
2869 /* if they are both literal then */
2870 /* rewrite the tree */
2871 if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
2873 tree->type = EX_VALUE;
2874 tree->opval.val = valPlus (valFromType (LETYPE (tree)),
2875 valFromType (RETYPE (tree)));
2876 tree->right = tree->left = NULL;
2877 TETYPE (tree) = getSpec (TTYPE (tree) =
2878 tree->opval.val->type);
2882 /* if the right is a pointer or left is a literal
2883 xchange left & right */
2884 if (IS_ARRAY (RTYPE (tree)) ||
2885 IS_PTR (RTYPE (tree)) ||
2886 IS_LITERAL (LTYPE (tree)))
2888 ast *tTree = tree->left;
2889 tree->left = tree->right;
2890 tree->right = tTree;
2893 /* if right is a literal and */
2894 /* left is also an addition/subtraction with a literal then */
2895 /* rearrange the tree */
2896 if (IS_LITERAL (RTYPE (tree)))
2898 ast *litTree, *parent;
2899 litTree = searchLitOp (tree, &parent, "+-");
2902 if (litTree->opval.op == '+')
2905 ast *tTree = litTree->left;
2906 litTree->left = tree->right;
2907 tree->right = tree->left;
2910 else if (litTree->opval.op == '-')
2912 if (IS_LITERAL (RTYPE (litTree)))
2915 ast *tTree = litTree->left;
2916 litTree->left = tree->right;
2917 tree->right = tTree;
2922 ast *tTree = litTree->right;
2923 litTree->right = tree->right;
2924 tree->right = tTree;
2925 litTree->opval.op = '+';
2926 tree->opval.op = '-';
2929 decorateType (parent);
2933 LRVAL (tree) = RRVAL (tree) = 1;
2934 /* if the left is a pointer */
2935 if (IS_PTR (LTYPE (tree)) || IS_AGGREGATE (LTYPE (tree)) )
2936 TETYPE (tree) = getSpec (TTYPE (tree) =
2939 TETYPE (tree) = getSpec (TTYPE (tree) =
2940 computeType (LTYPE (tree),
2945 /*------------------------------------------------------------------*/
2946 /*----------------------------*/
2948 /*----------------------------*/
2949 case '-': /* can be unary */
2950 /* if right is null then unary */
2954 if (!IS_ARITHMETIC (LTYPE (tree)))
2956 werror (E_UNARY_OP, tree->opval.op);
2957 goto errorTreeReturn;
2960 /* if left is a literal then do it */
2961 if (IS_LITERAL (LTYPE (tree)))
2963 tree->type = EX_VALUE;
2964 tree->opval.val = valUnaryPM (valFromType (LETYPE (tree)));
2966 TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
2967 SPEC_USIGN(TETYPE(tree)) = 0;
2971 TETYPE(tree) = getSpec (TTYPE (tree) = LTYPE (tree));
2975 /*------------------------------------------------------------------*/
2976 /*----------------------------*/
2978 /*----------------------------*/
2980 if (!(IS_PTR (LTYPE (tree)) ||
2981 IS_ARRAY (LTYPE (tree)) ||
2982 IS_ARITHMETIC (LTYPE (tree))))
2984 werror (E_PLUS_INVALID, "-");
2985 goto errorTreeReturn;
2988 if (!(IS_PTR (RTYPE (tree)) ||
2989 IS_ARRAY (RTYPE (tree)) ||
2990 IS_ARITHMETIC (RTYPE (tree))))
2992 werror (E_PLUS_INVALID, "-");
2993 goto errorTreeReturn;
2996 if ((IS_PTR (LTYPE (tree)) || IS_ARRAY (LTYPE (tree))) &&
2997 !(IS_PTR (RTYPE (tree)) || IS_ARRAY (RTYPE (tree)) ||
2998 IS_INTEGRAL (RTYPE (tree))))
3000 werror (E_PLUS_INVALID, "-");
3001 goto errorTreeReturn;
3004 /* if they are both literal then */
3005 /* rewrite the tree */
3006 if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
3008 tree->type = EX_VALUE;
3009 tree->opval.val = valMinus (valFromType (LETYPE (tree)),
3010 valFromType (RETYPE (tree)));
3011 tree->right = tree->left = NULL;
3012 TETYPE (tree) = getSpec (TTYPE (tree) =
3013 tree->opval.val->type);
3017 /* if the left & right are equal then zero */
3018 if (isAstEqual (tree->left, tree->right))
3020 tree->type = EX_VALUE;
3021 tree->left = tree->right = NULL;
3022 tree->opval.val = constVal ("0");
3023 TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
3027 /* if both of them are pointers or arrays then */
3028 /* the result is going to be an integer */
3029 if ((IS_ARRAY (LTYPE (tree)) || IS_PTR (LTYPE (tree))) &&
3030 (IS_ARRAY (RTYPE (tree)) || IS_PTR (RTYPE (tree))))
3031 TETYPE (tree) = TTYPE (tree) = newIntLink ();
3033 /* if only the left is a pointer */
3034 /* then result is a pointer */
3035 if (IS_PTR (LTYPE (tree)) || IS_ARRAY (LTYPE (tree)))
3036 TETYPE (tree) = getSpec (TTYPE (tree) =
3039 TETYPE (tree) = getSpec (TTYPE (tree) =
3040 computeType (LTYPE (tree),
3044 LRVAL (tree) = RRVAL (tree) = 1;
3046 /* if right is a literal and */
3047 /* left is also an addition/subtraction with a literal then */
3048 /* rearrange the tree */
3049 if (IS_LITERAL (RTYPE (tree))
3050 /* avoid infinite loop */
3051 && (TYPE_UDWORD) floatFromVal (tree->right->opval.val) != 0)
3053 ast *litTree, *litParent;
3054 litTree = searchLitOp (tree, &litParent, "+-");
3057 if (litTree->opval.op == '+')
3060 litTree->right = newNode ('-', litTree->right, tree->right);
3061 litTree->right->lineno = tree->lineno;
3063 tree->right->opval.val = constVal ("0");
3065 else if (litTree->opval.op == '-')
3067 if (IS_LITERAL (RTYPE (litTree)))
3070 litTree->right = newNode ('+', tree->right, litTree->right);
3071 litTree->right->lineno = tree->lineno;
3073 tree->right->opval.val = constVal ("0");
3078 ast *tTree = litTree->right;
3079 litTree->right = tree->right;
3080 tree->right = tTree;
3083 decorateType (litParent);
3088 /*------------------------------------------------------------------*/
3089 /*----------------------------*/
3091 /*----------------------------*/
3093 /* can be only integral type */
3094 if (!IS_INTEGRAL (LTYPE (tree)))
3096 werror (E_UNARY_OP, tree->opval.op);
3097 goto errorTreeReturn;
3100 /* if left is a literal then do it */
3101 if (IS_LITERAL (LTYPE (tree)))
3103 tree->type = EX_VALUE;
3104 tree->opval.val = valComplement (valFromType (LETYPE (tree)));
3106 TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
3110 COPYTYPE (TTYPE (tree), TETYPE (tree), LTYPE (tree));
3113 /*------------------------------------------------------------------*/
3114 /*----------------------------*/
3116 /*----------------------------*/
3118 /* can be pointer */
3119 if (!IS_ARITHMETIC (LTYPE (tree)) &&
3120 !IS_PTR (LTYPE (tree)) &&
3121 !IS_ARRAY (LTYPE (tree)))
3123 werror (E_UNARY_OP, tree->opval.op);
3124 goto errorTreeReturn;
3127 /* if left is a literal then do it */
3128 if (IS_LITERAL (LTYPE (tree)))
3130 tree->type = EX_VALUE;
3131 tree->opval.val = valNot (valFromType (LETYPE (tree)));
3133 TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
3137 TTYPE (tree) = TETYPE (tree) = newCharLink ();
3140 /*------------------------------------------------------------------*/
3141 /*----------------------------*/
3143 /*----------------------------*/
3147 TTYPE (tree) = LTYPE (tree);
3148 TETYPE (tree) = LETYPE (tree);
3152 TTYPE (tree) = TETYPE (tree) = newCharLink ();
3157 if (!IS_INTEGRAL (LTYPE (tree)) || !IS_INTEGRAL (tree->left->etype))
3159 werror (E_SHIFT_OP_INVALID);
3160 werror (W_CONTINUE, "left & right types are ");
3161 printTypeChain (LTYPE (tree), stderr);
3162 fprintf (stderr, ",");
3163 printTypeChain (RTYPE (tree), stderr);
3164 fprintf (stderr, "\n");
3165 goto errorTreeReturn;
3168 /* if they are both literal then */
3169 /* rewrite the tree */
3170 if (IS_LITERAL (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))
3172 tree->type = EX_VALUE;
3173 tree->opval.val = valShift (valFromType (LETYPE (tree)),
3174 valFromType (RETYPE (tree)),
3175 (tree->opval.op == LEFT_OP ? 1 : 0));
3176 tree->right = tree->left = NULL;
3177 TETYPE (tree) = getSpec (TTYPE (tree) =
3178 tree->opval.val->type);
3182 LRVAL (tree) = RRVAL (tree) = 1;
3183 if (tree->opval.op == LEFT_OP)
3185 /* promote char to int */
3186 TETYPE (tree) = getSpec (TTYPE (tree) =
3187 computeType (LTYPE (tree),
3188 LTYPE (tree), /* no, not RTYPE! */
3193 /* no promotion necessary */
3194 TTYPE (tree) = TETYPE (tree) = copyLinkChain (LTYPE (tree));
3195 if (IS_LITERAL (TTYPE (tree)))
3196 SPEC_SCLS (TTYPE (tree)) &= ~S_LITERAL;
3199 /* if only the right side is a literal & we are
3200 shifting more than size of the left operand then zero */
3201 if (IS_LITERAL (RTYPE (tree)) &&
3202 ((TYPE_UDWORD) floatFromVal (valFromType (RETYPE (tree)))) >=
3203 (getSize (TETYPE (tree)) * 8))
3205 if (tree->opval.op==LEFT_OP ||
3206 (tree->opval.op==RIGHT_OP && SPEC_USIGN(LETYPE(tree))))
3208 lineno=tree->lineno;
3209 werror (W_SHIFT_CHANGED,
3210 (tree->opval.op == LEFT_OP ? "left" : "right"));
3211 tree->type = EX_VALUE;
3212 tree->left = tree->right = NULL;
3213 tree->opval.val = constVal ("0");
3214 TETYPE (tree) = TTYPE (tree) = tree->opval.val->type;
3221 /*------------------------------------------------------------------*/
3222 /*----------------------------*/
3224 /*----------------------------*/
3225 case CAST: /* change the type */
3226 /* cannot cast to an aggregate type */
3227 if (IS_AGGREGATE (LTYPE (tree)))
3229 werror (E_CAST_ILLEGAL);
3230 goto errorTreeReturn;
3233 /* make sure the type is complete and sane */
3234 checkTypeSanity(LETYPE(tree), "(cast)");
3237 /* if the right is a literal replace the tree */
3238 if (IS_LITERAL (RETYPE (tree))) {
3239 if (!IS_PTR (LTYPE (tree))) {
3240 tree->type = EX_VALUE;
3242 valCastLiteral (LTYPE (tree),
3243 floatFromVal (valFromType (RETYPE (tree))));
3246 TTYPE (tree) = tree->opval.val->type;
3247 tree->values.literalFromCast = 1;
3248 } else if (IS_GENPTR(LTYPE(tree)) && !IS_PTR(RTYPE(tree)) &&
3249 ((int)floatFromVal(valFromType(RETYPE(tree)))) !=0 ) /* special case of NULL */ {
3250 sym_link *rest = LTYPE(tree)->next;
3251 werror(W_LITERAL_GENERIC);
3252 TTYPE(tree) = newLink(DECLARATOR);
3253 DCL_TYPE(TTYPE(tree)) = FPOINTER;
3254 TTYPE(tree)->next = rest;
3255 tree->left->opval.lnk = TTYPE(tree);
3258 TTYPE (tree) = LTYPE (tree);
3262 TTYPE (tree) = LTYPE (tree);
3266 #if 0 // this is already checked, now this could be explicit
3267 /* if pointer to struct then check names */
3268 if (IS_PTR(LTYPE(tree)) && IS_STRUCT(LTYPE(tree)->next) &&
3269 IS_PTR(RTYPE(tree)) && IS_STRUCT(RTYPE(tree)->next) &&
3270 strcmp(SPEC_STRUCT(LETYPE(tree))->tag,SPEC_STRUCT(RETYPE(tree))->tag))
3272 werror(W_CAST_STRUCT_PTR,SPEC_STRUCT(RETYPE(tree))->tag,
3273 SPEC_STRUCT(LETYPE(tree))->tag);
3276 if (IS_ADDRESS_OF_OP(tree->right)
3277 && IS_AST_SYM_VALUE (tree->right->left)
3278 && SPEC_ABSA (AST_SYMBOL (tree->right->left)->etype)) {
3280 tree->type = EX_VALUE;
3282 valCastLiteral (LTYPE (tree),
3283 SPEC_ADDR (AST_SYMBOL (tree->right->left)->etype));
3284 TTYPE (tree) = tree->opval.val->type;
3285 TETYPE (tree) = getSpec (TTYPE (tree));
3288 tree->values.literalFromCast = 1;
3292 /* handle offsetof macro: */
3293 /* #define offsetof(TYPE, MEMBER) \ */
3294 /* ((unsigned) &((TYPE *)0)->MEMBER) */
3295 if (IS_ADDRESS_OF_OP(tree->right)
3296 && IS_AST_OP (tree->right->left)
3297 && tree->right->left->opval.op == PTR_OP
3298 && IS_AST_OP (tree->right->left->left)
3299 && tree->right->left->left->opval.op == CAST
3300 && IS_AST_LIT_VALUE(tree->right->left->left->right)) {
3302 symbol *element = getStructElement (
3303 SPEC_STRUCT (LETYPE(tree->right->left)),
3304 AST_SYMBOL(tree->right->left->right)
3308 tree->type = EX_VALUE;
3309 tree->opval.val = valCastLiteral (
3312 + floatFromVal (valFromType (RTYPE (tree->right->left->left)))
3315 TTYPE (tree) = tree->opval.val->type;
3316 TETYPE (tree) = getSpec (TTYPE (tree));
3323 /* if the right is a literal replace the tree */
3324 if (IS_LITERAL (RETYPE (tree))) {
3326 if (IS_PTR (LTYPE (tree)) && !IS_GENPTR (LTYPE (tree)) ) {
3327 /* rewrite (type *)litaddr
3329 and define type at litaddr temp
3330 (but only if type's storage class is not generic)
3332 ast *newTree = newNode ('&', NULL, NULL);
3335 TTYPE (newTree) = LTYPE (tree);
3336 TETYPE (newTree) = getSpec(LTYPE (tree));
3338 /* define a global symbol at the casted address*/
3339 sym = newSymbol(genSymName (0), 0);
3340 sym->type = LTYPE (tree)->next;
3342 sym->type = newLink (V_VOID);
3343 sym->etype = getSpec(sym->type);
3344 SPEC_SCLS (sym->etype) = sclsFromPtr (LTYPE (tree));
3345 sym->lineDef = tree->lineno;
3348 SPEC_STAT (sym->etype) = 1;
3349 SPEC_ADDR(sym->etype) = floatFromVal (valFromType (RTYPE (tree)));
3350 SPEC_ABSA(sym->etype) = 1;
3351 addSym (SymbolTab, sym, sym->name, 0, 0, 0);
3354 newTree->left = newAst_VALUE(symbolVal(sym));
3355 newTree->left->lineno = tree->lineno;
3356 LTYPE (newTree) = sym->type;
3357 LETYPE (newTree) = sym->etype;
3358 LLVAL (newTree) = 1;
3359 LRVAL (newTree) = 0;
3360 TLVAL (newTree) = 1;
3364 if (!IS_PTR (LTYPE (tree))) {
3365 tree->type = EX_VALUE;
3367 valCastLiteral (LTYPE (tree),
3368 floatFromVal (valFromType (RTYPE (tree))));
3369 TTYPE (tree) = tree->opval.val->type;
3372 tree->values.literalFromCast = 1;
3373 TETYPE (tree) = getSpec (TTYPE (tree));
3377 TTYPE (tree) = LTYPE (tree);
3381 TETYPE (tree) = getSpec (TTYPE (tree));
3385 /*------------------------------------------------------------------*/
3386 /*----------------------------*/
3387 /* logical &&, || */
3388 /*----------------------------*/
3391 /* each must me arithmetic type or be a pointer */
3392 if (!IS_PTR (LTYPE (tree)) &&
3393 !IS_ARRAY (LTYPE (tree)) &&
3394 !IS_INTEGRAL (LTYPE (tree)))
3396 werror (E_COMPARE_OP);
3397 goto errorTreeReturn;
3400 if (!IS_PTR (RTYPE (tree)) &&
3401 !IS_ARRAY (RTYPE (tree)) &&
3402 !IS_INTEGRAL (RTYPE (tree)))
3404 werror (E_COMPARE_OP);
3405 goto errorTreeReturn;
3407 /* if they are both literal then */
3408 /* rewrite the tree */
3409 if (IS_LITERAL (RTYPE (tree)) &&
3410 IS_LITERAL (LTYPE (tree)))
3412 tree->type = EX_VALUE;
3413 tree->opval.val = valLogicAndOr (valFromType (LTYPE (tree)),
3414 valFromType (RTYPE (tree)),
3416 tree->right = tree->left = NULL;
3417 TETYPE (tree) = getSpec (TTYPE (tree) =
3418 tree->opval.val->type);
3421 LRVAL (tree) = RRVAL (tree) = 1;
3422 TTYPE (tree) = TETYPE (tree) = newCharLink ();
3425 /*------------------------------------------------------------------*/
3426 /*----------------------------*/
3427 /* comparison operators */
3428 /*----------------------------*/
3436 ast *lt = optimizeCompare (tree);
3442 /* if they are pointers they must be castable */
3443 if (IS_PTR (LTYPE (tree)) && IS_PTR (RTYPE (tree)))
3445 if (tree->opval.op==EQ_OP &&
3446 !IS_GENPTR(LTYPE(tree)) && IS_GENPTR(RTYPE(tree))) {
3447 // we cannot cast a gptr to a !gptr: switch the leaves
3448 struct ast *s=tree->left;
3449 tree->left=tree->right;
3452 if (compareType (LTYPE (tree), RTYPE (tree)) == 0)
3454 werror (E_COMPARE_OP);
3455 fprintf (stderr, "comparing type ");
3456 printTypeChain (LTYPE (tree), stderr);
3457 fprintf (stderr, "to type ");
3458 printTypeChain (RTYPE (tree), stderr);
3459 fprintf (stderr, "\n");
3460 goto errorTreeReturn;
3463 /* else they should be promotable to one another */
3466 if (!((IS_PTR (LTYPE (tree)) && IS_LITERAL (RTYPE (tree))) ||
3467 (IS_PTR (RTYPE (tree)) && IS_LITERAL (LTYPE (tree)))))
3469 if (compareType (LTYPE (tree), RTYPE (tree)) == 0)
3471 werror (E_COMPARE_OP);
3472 fprintf (stderr, "comparing type ");
3473 printTypeChain (LTYPE (tree), stderr);
3474 fprintf (stderr, "to type ");
3475 printTypeChain (RTYPE (tree), stderr);
3476 fprintf (stderr, "\n");
3477 goto errorTreeReturn;
3480 /* if unsigned value < 0 then always false */
3481 /* if (unsigned value) > 0 then (unsigned value) */
3482 if (SPEC_USIGN(LETYPE(tree)) && IS_LITERAL(RTYPE(tree)) &&
3483 ((int) floatFromVal (valFromType (RETYPE (tree)))) == 0)
3485 if (tree->opval.op == '<')
3489 if (tree->opval.op == '>')
3494 /* if they are both literal then */
3495 /* rewrite the tree */
3496 if (IS_LITERAL (RTYPE (tree)) &&
3497 IS_LITERAL (LTYPE (tree)))
3499 tree->type = EX_VALUE;
3500 tree->opval.val = valCompare (valFromType (LETYPE (tree)),
3501 valFromType (RETYPE (tree)),
3503 tree->right = tree->left = NULL;
3504 TETYPE (tree) = getSpec (TTYPE (tree) =
3505 tree->opval.val->type);
3508 LRVAL (tree) = RRVAL (tree) = 1;
3509 TTYPE (tree) = TETYPE (tree) = newCharLink ();
3512 /*------------------------------------------------------------------*/
3513 /*----------------------------*/
3515 /*----------------------------*/
3516 case SIZEOF: /* evaluate wihout code generation */
3517 /* change the type to a integer */
3518 tree->type = EX_VALUE;
3519 SNPRINTF(buffer, sizeof(buffer), "%d", (getSize (tree->right->ftype)));
3520 tree->opval.val = constVal (buffer);
3521 tree->right = tree->left = NULL;
3522 TETYPE (tree) = getSpec (TTYPE (tree) =
3523 tree->opval.val->type);
3526 /*------------------------------------------------------------------*/
3527 /*----------------------------*/
3529 /*----------------------------*/
3531 /* return typeof enum value */
3532 tree->type = EX_VALUE;
3535 if (IS_SPEC(tree->right->ftype)) {
3536 switch (SPEC_NOUN(tree->right->ftype)) {
3538 if (SPEC_LONG(tree->right->ftype)) typeofv = TYPEOF_LONG;
3539 else typeofv = TYPEOF_INT;
3542 typeofv = TYPEOF_FLOAT;
3545 typeofv = TYPEOF_CHAR;
3548 typeofv = TYPEOF_VOID;
3551 typeofv = TYPEOF_STRUCT;
3554 typeofv = TYPEOF_BITFIELD;
3557 typeofv = TYPEOF_BIT;
3560 typeofv = TYPEOF_SBIT;
3566 switch (DCL_TYPE(tree->right->ftype)) {
3568 typeofv = TYPEOF_POINTER;
3571 typeofv = TYPEOF_FPOINTER;
3574 typeofv = TYPEOF_CPOINTER;
3577 typeofv = TYPEOF_GPOINTER;
3580 typeofv = TYPEOF_PPOINTER;
3583 typeofv = TYPEOF_IPOINTER;
3586 typeofv = TYPEOF_ARRAY;
3589 typeofv = TYPEOF_FUNCTION;
3595 SNPRINTF (buffer, sizeof(buffer), "%d", typeofv);
3596 tree->opval.val = constVal (buffer);
3597 tree->right = tree->left = NULL;
3598 TETYPE (tree) = getSpec (TTYPE (tree) =
3599 tree->opval.val->type);
3602 /*------------------------------------------------------------------*/
3603 /*----------------------------*/
3604 /* conditional operator '?' */
3605 /*----------------------------*/
3607 /* the type is value of the colon operator (on the right) */
3608 assert(IS_COLON_OP(tree->right));
3609 /* if already known then replace the tree : optimizer will do it
3610 but faster to do it here */
3611 if (IS_LITERAL (LTYPE(tree))) {
3612 if ( ((int) floatFromVal (valFromType (LETYPE (tree)))) != 0) {
3613 return decorateType(tree->right->left) ;
3615 return decorateType(tree->right->right) ;
3618 tree->right = decorateType(tree->right);
3619 TTYPE (tree) = RTYPE(tree);
3620 TETYPE (tree) = getSpec (TTYPE (tree));
3625 /* if they don't match we have a problem */
3626 if (compareType (LTYPE (tree), RTYPE (tree)) == 0)
3628 werror (E_TYPE_MISMATCH, "conditional operator", " ");
3629 goto errorTreeReturn;
3632 TTYPE (tree) = computeType (LTYPE (tree), RTYPE (tree), FALSE);
3633 TETYPE (tree) = getSpec (TTYPE (tree));
3637 #if 0 // assignment operators are converted by the parser
3638 /*------------------------------------------------------------------*/
3639 /*----------------------------*/
3640 /* assignment operators */
3641 /*----------------------------*/
3644 /* for these it must be both must be integral */
3645 if (!IS_ARITHMETIC (LTYPE (tree)) ||
3646 !IS_ARITHMETIC (RTYPE (tree)))
3648 werror (E_OPS_INTEGRAL);
3649 goto errorTreeReturn;
3652 TETYPE (tree) = getSpec (TTYPE (tree) = LTYPE (tree));
3654 if (!tree->initMode && IS_CONSTANT (LTYPE (tree)))
3655 werror (E_CODE_WRITE, tree->opval.op==MUL_ASSIGN ? "*=" : "/=");
3659 werror (E_LVALUE_REQUIRED, tree->opval.op==MUL_ASSIGN ? "*=" : "/=");
3660 goto errorTreeReturn;
3671 /* for these it must be both must be integral */
3672 if (!IS_INTEGRAL (LTYPE (tree)) ||
3673 !IS_INTEGRAL (RTYPE (tree)))
3675 werror (E_OPS_INTEGRAL);
3676 goto errorTreeReturn;
3679 TETYPE (tree) = getSpec (TTYPE (tree) = LTYPE (tree));
3681 if (!tree->initMode && IS_CONSTANT (LETYPE (tree)))
3682 werror (E_CODE_WRITE, "&= or |= or ^= or >>= or <<=");
3686 werror (E_LVALUE_REQUIRED, "&= or |= or ^= or >>= or <<=");
3687 goto errorTreeReturn;
3693 /*------------------------------------------------------------------*/
3694 /*----------------------------*/
3696 /*----------------------------*/
3698 if (!(IS_PTR (LTYPE (tree)) ||
3699 IS_ARITHMETIC (LTYPE (tree))))
3701 werror (E_PLUS_INVALID, "-=");
3702 goto errorTreeReturn;
3705 if (!(IS_PTR (RTYPE (tree)) ||
3706 IS_ARITHMETIC (RTYPE (tree))))
3708 werror (E_PLUS_INVALID, "-=");
3709 goto errorTreeReturn;
3712 TETYPE (tree) = getSpec (TTYPE (tree) =
3713 computeType (LTYPE (tree),
3717 if (!tree->initMode && IS_CONSTANT (LETYPE (tree)))
3718 werror (E_CODE_WRITE, "-=");
3722 werror (E_LVALUE_REQUIRED, "-=");
3723 goto errorTreeReturn;
3729 /*------------------------------------------------------------------*/
3730 /*----------------------------*/
3732 /*----------------------------*/
3734 /* this is not a unary operation */
3735 /* if both pointers then problem */
3736 if (IS_PTR (LTYPE (tree)) && IS_PTR (RTYPE (tree)))
3738 werror (E_PTR_PLUS_PTR);
3739 goto errorTreeReturn;
3742 if (!IS_ARITHMETIC (LTYPE (tree)) && !IS_PTR (LTYPE (tree)))
3744 werror (E_PLUS_INVALID, "+=");
3745 goto errorTreeReturn;
3748 if (!IS_ARITHMETIC (RTYPE (tree)) && !IS_PTR (RTYPE (tree)))
3750 werror (E_PLUS_INVALID, "+=");
3751 goto errorTreeReturn;
3754 TETYPE (tree) = getSpec (TTYPE (tree) =
3755 computeType (LTYPE (tree),
3759 if (!tree->initMode && IS_CONSTANT (LETYPE (tree)))
3760 werror (E_CODE_WRITE, "+=");
3764 werror (E_LVALUE_REQUIRED, "+=");
3765 goto errorTreeReturn;
3768 tree->right = decorateType (newNode ('+', copyAst (tree->left), tree->right));
3769 tree->opval.op = '=';
3774 /*------------------------------------------------------------------*/
3775 /*----------------------------*/
3776 /* straight assignemnt */
3777 /*----------------------------*/
3779 /* cannot be an aggregate */
3780 if (IS_AGGREGATE (LTYPE (tree)))
3782 werror (E_AGGR_ASSIGN);
3783 goto errorTreeReturn;
3786 /* they should either match or be castable */
3787 if (compareType (LTYPE (tree), RTYPE (tree)) == 0)
3789 werror (E_TYPE_MISMATCH, "assignment", " ");
3790 printFromToType(RTYPE(tree),LTYPE(tree));
3793 /* if the left side of the tree is of type void
3794 then report error */
3795 if (IS_VOID (LTYPE (tree)))
3797 werror (E_CAST_ZERO);
3798 printFromToType(RTYPE(tree), LTYPE(tree));
3801 TETYPE (tree) = getSpec (TTYPE (tree) =
3805 if (!tree->initMode ) {
3806 if (IS_CONSTANT(LTYPE(tree)))
3807 werror (E_CODE_WRITE, "=");
3811 werror (E_LVALUE_REQUIRED, "=");
3812 goto errorTreeReturn;
3817 /*------------------------------------------------------------------*/
3818 /*----------------------------*/
3819 /* comma operator */
3820 /*----------------------------*/
3822 TETYPE (tree) = getSpec (TTYPE (tree) = RTYPE (tree));
3825 /*------------------------------------------------------------------*/
3826 /*----------------------------*/
3828 /*----------------------------*/
3832 if (processParms (tree->left,
3833 FUNC_ARGS(tree->left->ftype),
3834 tree->right, &parmNumber, TRUE)) {
3835 goto errorTreeReturn;
3838 if ((options.stackAuto || IFFUNC_ISREENT (LTYPE (tree))) &&
3839 !IFFUNC_ISBUILTIN(LTYPE(tree)))
3841 reverseParms (tree->right);
3844 if (IS_CODEPTR(LTYPE(tree))) {
3845 TTYPE(tree) = LTYPE(tree)->next->next;
3847 TTYPE(tree) = LTYPE(tree)->next;
3849 TETYPE (tree) = getSpec (TTYPE (tree));
3852 /*------------------------------------------------------------------*/
3853 /*----------------------------*/
3854 /* return statement */
3855 /*----------------------------*/
3860 if (compareType (currFunc->type->next, RTYPE (tree)) == 0)
3862 werrorfl (tree->filename, tree->lineno, W_RETURN_MISMATCH);
3863 printFromToType (RTYPE(tree), currFunc->type->next);
3864 goto errorTreeReturn;
3867 if (IS_VOID (currFunc->type->next)
3869 !IS_VOID (RTYPE (tree)))
3871 werrorfl (tree->filename, tree->lineno, E_FUNC_VOID);
3872 goto errorTreeReturn;
3875 /* if there is going to be a casing required then add it */
3876 if (compareType (currFunc->type->next, RTYPE (tree)) < 0)
3879 decorateType (newNode (CAST,
3880 newAst_LINK (copyLinkChain (currFunc->type->next)),
3889 if (!IS_VOID (currFunc->type->next) && tree->right == NULL)
3891 werror (W_VOID_FUNC, currFunc->name);
3892 goto errorTreeReturn;
3895 TTYPE (tree) = TETYPE (tree) = NULL;
3898 /*------------------------------------------------------------------*/
3899 /*----------------------------*/
3900 /* switch statement */
3901 /*----------------------------*/
3903 /* the switch value must be an integer */
3904 if (!IS_INTEGRAL (LTYPE (tree)))
3906 werrorfl (tree->filename, tree->lineno, E_SWITCH_NON_INTEGER);
3907 goto errorTreeReturn;
3910 TTYPE (tree) = TETYPE (tree) = NULL;
3913 /*------------------------------------------------------------------*/
3914 /*----------------------------*/
3916 /*----------------------------*/
3918 tree->left = backPatchLabels (tree->left,
3921 TTYPE (tree) = TETYPE (tree) = NULL;
3924 /*------------------------------------------------------------------*/
3925 /*----------------------------*/
3927 /*----------------------------*/
3930 decorateType (resolveSymbols (AST_FOR (tree, initExpr)));
3931 decorateType (resolveSymbols (AST_FOR (tree, condExpr)));
3932 decorateType (resolveSymbols (AST_FOR (tree, loopExpr)));
3934 /* if the for loop is reversible then
3935 reverse it otherwise do what we normally
3941 if (isLoopReversible (tree, &sym, &init, &end))
3942 return reverseLoop (tree, sym, init, end);
3944 return decorateType (createFor (AST_FOR (tree, trueLabel),
3945 AST_FOR (tree, continueLabel),
3946 AST_FOR (tree, falseLabel),
3947 AST_FOR (tree, condLabel),
3948 AST_FOR (tree, initExpr),
3949 AST_FOR (tree, condExpr),
3950 AST_FOR (tree, loopExpr),
3954 TTYPE (tree) = TETYPE (tree) = NULL;
3958 /* some error found this tree will be killed */
3960 TTYPE (tree) = TETYPE (tree) = newCharLink ();
3961 tree->opval.op = NULLOP;
3967 /*-----------------------------------------------------------------*/
3968 /* sizeofOp - processes size of operation */
3969 /*-----------------------------------------------------------------*/
3971 sizeofOp (sym_link * type)
3975 /* make sure the type is complete and sane */
3976 checkTypeSanity(type, "(sizeof)");
3978 /* get the size and convert it to character */
3979 SNPRINTF (buff, sizeof(buff), "%d", getSize (type));
3981 /* now convert into value */
3982 return constVal (buff);
3986 #define IS_AND(ex) (ex->type == EX_OP && ex->opval.op == AND_OP )
3987 #define IS_OR(ex) (ex->type == EX_OP && ex->opval.op == OR_OP )
3988 #define IS_NOT(ex) (ex->type == EX_OP && ex->opval.op == '!' )
3989 #define IS_ANDORNOT(ex) (IS_AND(ex) || IS_OR(ex) || IS_NOT(ex))
3990 #define IS_IFX(ex) (ex->type == EX_OP && ex->opval.op == IFX )
3991 #define IS_LT(ex) (ex->type == EX_OP && ex->opval.op == '<' )
3992 #define IS_GT(ex) (ex->type == EX_OP && ex->opval.op == '>')
3994 /*-----------------------------------------------------------------*/
3995 /* backPatchLabels - change and or not operators to flow control */
3996 /*-----------------------------------------------------------------*/
3998 backPatchLabels (ast * tree, symbol * trueLabel, symbol * falseLabel)
4004 if (!(IS_ANDORNOT (tree)))
4007 /* if this an and */
4010 static int localLbl = 0;
4013 SNPRINTF(buffer, sizeof(buffer), "_andif_%d", localLbl++);
4014 localLabel = newSymbol (buffer, NestLevel);
4016 tree->left = backPatchLabels (tree->left, localLabel, falseLabel);
4018 /* if left is already a IFX then just change the if true label in that */
4019 if (!IS_IFX (tree->left))
4020 tree->left = newIfxNode (tree->left, localLabel, falseLabel);
4022 tree->right = backPatchLabels (tree->right, trueLabel, falseLabel);
4023 /* right is a IFX then just join */
4024 if (IS_IFX (tree->right))
4025 return newNode (NULLOP, tree->left, createLabel (localLabel, tree->right));
4027 tree->right = createLabel (localLabel, tree->right);
4028 tree->right = newIfxNode (tree->right, trueLabel, falseLabel);
4030 return newNode (NULLOP, tree->left, tree->right);
4033 /* if this is an or operation */
4036 static int localLbl = 0;
4039 SNPRINTF(buffer, sizeof(buffer), "_orif_%d", localLbl++);
4040 localLabel = newSymbol (buffer, NestLevel);
4042 tree->left = backPatchLabels (tree->left, trueLabel, localLabel);
4044 /* if left is already a IFX then just change the if true label in that */
4045 if (!IS_IFX (tree->left))
4046 tree->left = newIfxNode (tree->left, trueLabel, localLabel);
4048 tree->right = backPatchLabels (tree->right, trueLabel, falseLabel);
4049 /* right is a IFX then just join */
4050 if (IS_IFX (tree->right))
4051 return newNode (NULLOP, tree->left, createLabel (localLabel, tree->right));
4053 tree->right = createLabel (localLabel, tree->right);
4054 tree->right = newIfxNode (tree->right, trueLabel, falseLabel);
4056 return newNode (NULLOP, tree->left, tree->right);
4062 int wasnot = IS_NOT (tree->left);
4063 tree->left = backPatchLabels (tree->left, falseLabel, trueLabel);
4065 /* if the left is already a IFX */
4066 if (!IS_IFX (tree->left))
4067 tree->left = newNode (IFX, tree->left, NULL);
4071 tree->left->trueLabel = trueLabel;
4072 tree->left->falseLabel = falseLabel;
4076 tree->left->trueLabel = falseLabel;
4077 tree->left->falseLabel = trueLabel;
4084 tree->trueLabel = trueLabel;
4085 tree->falseLabel = falseLabel;
4092 /*-----------------------------------------------------------------*/
4093 /* createBlock - create expression tree for block */
4094 /*-----------------------------------------------------------------*/
4096 createBlock (symbol * decl, ast * body)
4100 /* if the block has nothing */
4104 ex = newNode (BLOCK, NULL, body);
4105 ex->values.sym = decl;
4107 ex->right = ex->right;
4113 /*-----------------------------------------------------------------*/
4114 /* createLabel - creates the expression tree for labels */
4115 /*-----------------------------------------------------------------*/
4117 createLabel (symbol * label, ast * stmnt)
4120 char name[SDCC_NAME_MAX + 1];
4123 /* must create fresh symbol if the symbol name */
4124 /* exists in the symbol table, since there can */
4125 /* be a variable with the same name as the labl */
4126 if ((csym = findSym (SymbolTab, NULL, label->name)) &&
4127 (csym->level == label->level))
4128 label = newSymbol (label->name, label->level);
4130 /* change the name before putting it in add _ */
4131 SNPRINTF(name, sizeof(name), "%s", label->name);
4133 /* put the label in the LabelSymbol table */
4134 /* but first check if a label of the same */
4136 if ((csym = findSym (LabelTab, NULL, name)))
4137 werror (E_DUPLICATE_LABEL, label->name);
4139 addSym (LabelTab, label, name, label->level, 0, 0);
4142 label->key = labelKey++;
4143 rValue = newNode (LABEL, newAst_VALUE (symbolVal (label)), stmnt);
4149 /*-----------------------------------------------------------------*/
4150 /* createCase - generates the parsetree for a case statement */
4151 /*-----------------------------------------------------------------*/
4153 createCase (ast * swStat, ast * caseVal, ast * stmnt)
4155 char caseLbl[SDCC_NAME_MAX + 1];
4159 /* if the switch statement does not exist */
4160 /* then case is out of context */
4163 werrorfl (caseVal->filename, caseVal->lineno, E_CASE_CONTEXT);
4167 caseVal = decorateType (resolveSymbols (caseVal));
4168 /* if not a constant then error */
4169 if (!IS_LITERAL (caseVal->ftype))
4171 werrorfl (caseVal->filename, caseVal->lineno, E_CASE_CONSTANT);
4175 /* if not a integer than error */
4176 if (!IS_INTEGRAL (caseVal->ftype))
4178 werrorfl (caseVal->filename, caseVal->lineno, E_CASE_NON_INTEGER);
4182 /* find the end of the switch values chain */
4183 if (!(val = swStat->values.switchVals.swVals))
4184 swStat->values.switchVals.swVals = caseVal->opval.val;
4187 /* also order the cases according to value */
4189 int cVal = (int) floatFromVal (caseVal->opval.val);
4190 while (val && (int) floatFromVal (val) < cVal)
4196 /* if we reached the end then */
4199 pval->next = caseVal->opval.val;
4201 else if ((int) floatFromVal (val) == cVal)
4203 werrorfl (caseVal->filename, caseVal->lineno, E_DUPLICATE_LABEL,
4209 /* we found a value greater than */
4210 /* the current value we must add this */
4211 /* before the value */
4212 caseVal->opval.val->next = val;
4214 /* if this was the first in chain */
4215 if (swStat->values.switchVals.swVals == val)
4216 swStat->values.switchVals.swVals =
4219 pval->next = caseVal->opval.val;
4224 /* create the case label */
4225 SNPRINTF(caseLbl, sizeof(caseLbl),
4227 swStat->values.switchVals.swNum,
4228 (int) floatFromVal (caseVal->opval.val));
4230 rexpr = createLabel (newSymbol (caseLbl, 0), stmnt);
4235 /*-----------------------------------------------------------------*/
4236 /* createDefault - creates the parse tree for the default statement */
4237 /*-----------------------------------------------------------------*/
4239 createDefault (ast * swStat, ast * defaultVal, ast * stmnt)
4241 char defLbl[SDCC_NAME_MAX + 1];
4243 /* if the switch statement does not exist */
4244 /* then case is out of context */
4247 werrorfl (defaultVal->filename, defaultVal->lineno, E_CASE_CONTEXT);
4251 if (swStat->values.switchVals.swDefault)
4253 werrorfl (defaultVal->filename, defaultVal->lineno, E_DUPLICATE_LABEL,
4258 /* turn on the default flag */
4259 swStat->values.switchVals.swDefault = 1;
4261 /* create the label */
4262 SNPRINTF (defLbl, sizeof(defLbl),
4263 "_default_%d", swStat->values.switchVals.swNum);
4264 return createLabel (newSymbol (defLbl, 0), stmnt);
4267 /*-----------------------------------------------------------------*/
4268 /* createIf - creates the parsetree for the if statement */
4269 /*-----------------------------------------------------------------*/
4271 createIf (ast * condAst, ast * ifBody, ast * elseBody)
4273 static int Lblnum = 0;
4275 symbol *ifTrue, *ifFalse, *ifEnd;
4277 /* if neither exists */
4278 if (!elseBody && !ifBody) {
4279 // if there are no side effects (i++, j() etc)
4280 if (!hasSEFcalls(condAst)) {
4285 /* create the labels */
4286 SNPRINTF (buffer, sizeof(buffer), "_iffalse_%d", Lblnum);
4287 ifFalse = newSymbol (buffer, NestLevel);
4288 /* if no else body then end == false */
4293 SNPRINTF(buffer, sizeof(buffer), "_ifend_%d", Lblnum);
4294 ifEnd = newSymbol (buffer, NestLevel);
4297 SNPRINTF (buffer, sizeof(buffer), "_iftrue_%d", Lblnum);
4298 ifTrue = newSymbol (buffer, NestLevel);
4302 /* attach the ifTrue label to the top of it body */
4303 ifBody = createLabel (ifTrue, ifBody);
4304 /* attach a goto end to the ifBody if else is present */
4307 ifBody = newNode (NULLOP, ifBody,
4309 newAst_VALUE (symbolVal (ifEnd)),
4311 /* put the elseLabel on the else body */
4312 elseBody = createLabel (ifFalse, elseBody);
4313 /* out the end at the end of the body */
4314 elseBody = newNode (NULLOP,
4316 createLabel (ifEnd, NULL));
4320 ifBody = newNode (NULLOP, ifBody,
4321 createLabel (ifFalse, NULL));
4323 condAst = backPatchLabels (condAst, ifTrue, ifFalse);
4324 if (IS_IFX (condAst))
4327 ifTree = newIfxNode (condAst, ifTrue, ifFalse);
4329 return newNode (NULLOP, ifTree,
4330 newNode (NULLOP, ifBody, elseBody));
4334 /*-----------------------------------------------------------------*/
4335 /* createDo - creates parse tree for do */
4338 /* _docontinue_n: */
4339 /* condition_expression +-> trueLabel -> _dobody_n */
4341 /* +-> falseLabel-> _dobreak_n */
4343 /*-----------------------------------------------------------------*/
4345 createDo (symbol * trueLabel, symbol * continueLabel,
4346 symbol * falseLabel, ast * condAst, ast * doBody)
4351 /* if the body does not exist then it is simple */
4354 condAst = backPatchLabels (condAst, continueLabel, NULL);
4355 doTree = (IS_IFX (condAst) ? createLabel (continueLabel, condAst)
4356 : newNode (IFX, createLabel (continueLabel, condAst), NULL));
4357 doTree->trueLabel = continueLabel;
4358 doTree->falseLabel = NULL;
4362 /* otherwise we have a body */
4363 condAst = backPatchLabels (condAst, trueLabel, falseLabel);
4365 /* attach the body label to the top */
4366 doBody = createLabel (trueLabel, doBody);
4367 /* attach the continue label to end of body */
4368 doBody = newNode (NULLOP, doBody,
4369 createLabel (continueLabel, NULL));
4371 /* now put the break label at the end */
4372 if (IS_IFX (condAst))
4375 doTree = newIfxNode (condAst, trueLabel, falseLabel);
4377 doTree = newNode (NULLOP, doTree, createLabel (falseLabel, NULL));
4379 /* putting it together */
4380 return newNode (NULLOP, doBody, doTree);
4383 /*-----------------------------------------------------------------*/
4384 /* createFor - creates parse tree for 'for' statement */
4387 /* condExpr +-> trueLabel -> _forbody_n */
4389 /* +-> falseLabel-> _forbreak_n */
4392 /* _forcontinue_n: */
4394 /* goto _forcond_n ; */
4396 /*-----------------------------------------------------------------*/
4398 createFor (symbol * trueLabel, symbol * continueLabel,
4399 symbol * falseLabel, symbol * condLabel,
4400 ast * initExpr, ast * condExpr, ast * loopExpr,
4405 /* if loopexpression not present then we can generate it */
4406 /* the same way as a while */
4408 return newNode (NULLOP, initExpr,
4409 createWhile (trueLabel, continueLabel,
4410 falseLabel, condExpr, forBody));
4411 /* vanilla for statement */
4412 condExpr = backPatchLabels (condExpr, trueLabel, falseLabel);
4414 if (condExpr && !IS_IFX (condExpr))
4415 condExpr = newIfxNode (condExpr, trueLabel, falseLabel);
4418 /* attach condition label to condition */
4419 condExpr = createLabel (condLabel, condExpr);
4421 /* attach body label to body */
4422 forBody = createLabel (trueLabel, forBody);
4424 /* attach continue to forLoop expression & attach */
4425 /* goto the forcond @ and of loopExpression */
4426 loopExpr = createLabel (continueLabel,
4430 newAst_VALUE (symbolVal (condLabel)),
4432 /* now start putting them together */
4433 forTree = newNode (NULLOP, initExpr, condExpr);
4434 forTree = newNode (NULLOP, forTree, forBody);
4435 forTree = newNode (NULLOP, forTree, loopExpr);
4436 /* finally add the break label */
4437 forTree = newNode (NULLOP, forTree,
4438 createLabel (falseLabel, NULL));
4442 /*-----------------------------------------------------------------*/
4443 /* createWhile - creates parse tree for while statement */
4444 /* the while statement will be created as follows */
4446 /* _while_continue_n: */
4447 /* condition_expression +-> trueLabel -> _while_boby_n */
4449 /* +-> falseLabel -> _while_break_n */
4450 /* _while_body_n: */
4452 /* goto _while_continue_n */
4453 /* _while_break_n: */
4454 /*-----------------------------------------------------------------*/
4456 createWhile (symbol * trueLabel, symbol * continueLabel,
4457 symbol * falseLabel, ast * condExpr, ast * whileBody)
4461 /* put the continue label */
4462 condExpr = backPatchLabels (condExpr, trueLabel, falseLabel);
4463 condExpr = createLabel (continueLabel, condExpr);
4464 condExpr->lineno = 0;
4466 /* put the body label in front of the body */
4467 whileBody = createLabel (trueLabel, whileBody);
4468 whileBody->lineno = 0;
4469 /* put a jump to continue at the end of the body */
4470 /* and put break label at the end of the body */
4471 whileBody = newNode (NULLOP,
4474 newAst_VALUE (symbolVal (continueLabel)),
4475 createLabel (falseLabel, NULL)));
4477 /* put it all together */
4478 if (IS_IFX (condExpr))
4479 whileTree = condExpr;
4482 whileTree = newNode (IFX, condExpr, NULL);
4483 /* put the true & false labels in place */
4484 whileTree->trueLabel = trueLabel;
4485 whileTree->falseLabel = falseLabel;
4488 return newNode (NULLOP, whileTree, whileBody);
4491 /*-----------------------------------------------------------------*/
4492 /* optimizeGetHbit - get highest order bit of the expression */
4493 /*-----------------------------------------------------------------*/
4495 optimizeGetHbit (ast * tree)
4498 /* if this is not a bit and */
4499 if (!IS_BITAND (tree))
4502 /* will look for tree of the form
4503 ( expr >> ((sizeof expr) -1) ) & 1 */
4504 if (!IS_AST_LIT_VALUE (tree->right))
4507 if (AST_LIT_VALUE (tree->right) != 1)
4510 if (!IS_RIGHT_OP (tree->left))
4513 if (!IS_AST_LIT_VALUE (tree->left->right))
4516 if ((i = (int) AST_LIT_VALUE (tree->left->right)) !=
4517 (j = (getSize (TTYPE (tree->left->left)) * 8 - 1)))
4520 /* make sure the port supports GETHBIT */
4521 if (port->hasExtBitOp
4522 && !port->hasExtBitOp(GETHBIT, getSize (TTYPE (tree->left->left))))
4525 return decorateType (newNode (GETHBIT, tree->left->left, NULL));
4529 /*-----------------------------------------------------------------*/
4530 /* optimizeRRCRLC :- optimize for Rotate Left/Right with carry */
4531 /*-----------------------------------------------------------------*/
4533 optimizeRRCRLC (ast * root)
4535 /* will look for trees of the form
4536 (?expr << 1) | (?expr >> 7) or
4537 (?expr >> 7) | (?expr << 1) will make that
4538 into a RLC : operation ..
4540 (?expr >> 1) | (?expr << 7) or
4541 (?expr << 7) | (?expr >> 1) will make that
4542 into a RRC operation
4543 note : by 7 I mean (number of bits required to hold the
4545 /* if the root operations is not a | operation the not */
4546 if (!IS_BITOR (root))
4549 /* I have to think of a better way to match patterns this sucks */
4550 /* that aside let start looking for the first case : I use a the
4551 negative check a lot to improve the efficiency */
4552 /* (?expr << 1) | (?expr >> 7) */
4553 if (IS_LEFT_OP (root->left) &&
4554 IS_RIGHT_OP (root->right))
4557 if (!SPEC_USIGN (TETYPE (root->left->left)))
4560 if (!IS_AST_LIT_VALUE (root->left->right) ||
4561 !IS_AST_LIT_VALUE (root->right->right))
4564 /* make sure it is the same expression */
4565 if (!isAstEqual (root->left->left,
4569 if (AST_LIT_VALUE (root->left->right) != 1)
4572 if (AST_LIT_VALUE (root->right->right) !=
4573 (getSize (TTYPE (root->left->left)) * 8 - 1))
4576 /* make sure the port supports RLC */
4577 if (port->hasExtBitOp
4578 && !port->hasExtBitOp(RLC, getSize (TTYPE (root->left->left))))
4581 /* whew got the first case : create the AST */
4582 return newNode (RLC, root->left->left, NULL);
4586 /* check for second case */
4587 /* (?expr >> 7) | (?expr << 1) */
4588 if (IS_LEFT_OP (root->right) &&
4589 IS_RIGHT_OP (root->left))
4592 if (!SPEC_USIGN (TETYPE (root->left->left)))
4595 if (!IS_AST_LIT_VALUE (root->left->right) ||
4596 !IS_AST_LIT_VALUE (root->right->right))
4599 /* make sure it is the same symbol */
4600 if (!isAstEqual (root->left->left,
4604 if (AST_LIT_VALUE (root->right->right) != 1)
4607 if (AST_LIT_VALUE (root->left->right) !=
4608 (getSize (TTYPE (root->left->left)) * 8 - 1))
4611 /* make sure the port supports RLC */
4612 if (port->hasExtBitOp
4613 && !port->hasExtBitOp(RLC, getSize (TTYPE (root->left->left))))
4616 /* whew got the first case : create the AST */
4617 return newNode (RLC, root->left->left, NULL);
4622 /* third case for RRC */
4623 /* (?symbol >> 1) | (?symbol << 7) */
4624 if (IS_LEFT_OP (root->right) &&
4625 IS_RIGHT_OP (root->left))
4628 if (!SPEC_USIGN (TETYPE (root->left->left)))
4631 if (!IS_AST_LIT_VALUE (root->left->right) ||
4632 !IS_AST_LIT_VALUE (root->right->right))
4635 /* make sure it is the same symbol */
4636 if (!isAstEqual (root->left->left,
4640 if (AST_LIT_VALUE (root->left->right) != 1)
4643 if (AST_LIT_VALUE (root->right->right) !=
4644 (getSize (TTYPE (root->left->left)) * 8 - 1))
4647 /* make sure the port supports RRC */
4648 if (port->hasExtBitOp
4649 && !port->hasExtBitOp(RRC, getSize (TTYPE (root->left->left))))
4652 /* whew got the first case : create the AST */
4653 return newNode (RRC, root->left->left, NULL);
4657 /* fourth and last case for now */
4658 /* (?symbol << 7) | (?symbol >> 1) */
4659 if (IS_RIGHT_OP (root->right) &&
4660 IS_LEFT_OP (root->left))
4663 if (!SPEC_USIGN (TETYPE (root->left->left)))
4666 if (!IS_AST_LIT_VALUE (root->left->right) ||
4667 !IS_AST_LIT_VALUE (root->right->right))
4670 /* make sure it is the same symbol */
4671 if (!isAstEqual (root->left->left,
4675 if (AST_LIT_VALUE (root->right->right) != 1)
4678 if (AST_LIT_VALUE (root->left->right) !=
4679 (getSize (TTYPE (root->left->left)) * 8 - 1))
4682 /* make sure the port supports RRC */
4683 if (port->hasExtBitOp
4684 && !port->hasExtBitOp(RRC, getSize (TTYPE (root->left->left))))
4687 /* whew got the first case : create the AST */
4688 return newNode (RRC, root->left->left, NULL);
4692 /* not found return root */
4696 /*-----------------------------------------------------------------*/
4697 /* optimizeSWAP :- optimize for nibble/byte/word swaps */
4698 /*-----------------------------------------------------------------*/
4700 optimizeSWAP (ast * root)
4702 /* will look for trees of the form
4703 (?expr << 4) | (?expr >> 4) or
4704 (?expr >> 4) | (?expr << 4) will make that
4705 into a SWAP : operation ..
4706 note : by 4 I mean (number of bits required to hold the
4708 /* if the root operations is not a | operation the not */
4709 if (!IS_BITOR (root))
4712 /* (?expr << 4) | (?expr >> 4) */
4713 if ((IS_LEFT_OP (root->left) && IS_RIGHT_OP (root->right))
4714 || (IS_RIGHT_OP (root->left) && IS_LEFT_OP (root->right)))
4717 if (!SPEC_USIGN (TETYPE (root->left->left)))
4720 if (!IS_AST_LIT_VALUE (root->left->right) ||
4721 !IS_AST_LIT_VALUE (root->right->right))
4724 /* make sure it is the same expression */
4725 if (!isAstEqual (root->left->left,
4729 if (AST_LIT_VALUE (root->left->right) !=
4730 (getSize (TTYPE (root->left->left)) * 4))
4733 if (AST_LIT_VALUE (root->right->right) !=
4734 (getSize (TTYPE (root->left->left)) * 4))
4737 /* make sure the port supports SWAP */
4738 if (port->hasExtBitOp
4739 && !port->hasExtBitOp(SWAP, getSize (TTYPE (root->left->left))))
4742 /* found it : create the AST */
4743 return newNode (SWAP, root->left->left, NULL);
4747 /* not found return root */
4751 /*-----------------------------------------------------------------*/
4752 /* optimizeCompare - otimizes compares for bit variables */
4753 /*-----------------------------------------------------------------*/
4755 optimizeCompare (ast * root)
4757 ast *optExpr = NULL;
4760 unsigned int litValue;
4762 /* if nothing then return nothing */
4766 /* if not a compare op then do leaves */
4767 if (!IS_COMPARE_OP (root))
4769 root->left = optimizeCompare (root->left);
4770 root->right = optimizeCompare (root->right);
4774 /* if left & right are the same then depending
4775 of the operation do */
4776 if (isAstEqual (root->left, root->right))
4778 switch (root->opval.op)
4783 optExpr = newAst_VALUE (constVal ("0"));
4788 optExpr = newAst_VALUE (constVal ("1"));
4792 return decorateType (optExpr);
4795 vleft = (root->left->type == EX_VALUE ?
4796 root->left->opval.val : NULL);
4798 vright = (root->right->type == EX_VALUE ?
4799 root->right->opval.val : NULL);
4801 /* if left is a BITVAR in BITSPACE */
4802 /* and right is a LITERAL then opt- */
4803 /* imize else do nothing */
4804 if (vleft && vright &&
4805 IS_BITVAR (vleft->etype) &&
4806 IN_BITSPACE (SPEC_OCLS (vleft->etype)) &&
4807 IS_LITERAL (vright->etype))
4810 /* if right side > 1 then comparison may never succeed */
4811 if ((litValue = (int) floatFromVal (vright)) > 1)
4813 werror (W_BAD_COMPARE);
4819 switch (root->opval.op)
4821 case '>': /* bit value greater than 1 cannot be */
4822 werror (W_BAD_COMPARE);
4826 case '<': /* bit value < 1 means 0 */
4828 optExpr = newNode ('!', newAst_VALUE (vleft), NULL);
4831 case LE_OP: /* bit value <= 1 means no check */
4832 optExpr = newAst_VALUE (vright);
4835 case GE_OP: /* bit value >= 1 means only check for = */
4837 optExpr = newAst_VALUE (vleft);
4842 { /* literal is zero */
4843 switch (root->opval.op)
4845 case '<': /* bit value < 0 cannot be */
4846 werror (W_BAD_COMPARE);
4850 case '>': /* bit value > 0 means 1 */
4852 optExpr = newAst_VALUE (vleft);
4855 case LE_OP: /* bit value <= 0 means no check */
4856 case GE_OP: /* bit value >= 0 means no check */
4857 werror (W_BAD_COMPARE);
4861 case EQ_OP: /* bit == 0 means ! of bit */
4862 optExpr = newNode ('!', newAst_VALUE (vleft), NULL);
4866 return decorateType (resolveSymbols (optExpr));
4867 } /* end-of-if of BITVAR */
4872 /*-----------------------------------------------------------------*/
4873 /* addSymToBlock : adds the symbol to the first block we find */
4874 /*-----------------------------------------------------------------*/
4876 addSymToBlock (symbol * sym, ast * tree)
4878 /* reached end of tree or a leaf */
4879 if (!tree || IS_AST_LINK (tree) || IS_AST_VALUE (tree))
4883 if (IS_AST_OP (tree) &&
4884 tree->opval.op == BLOCK)
4887 symbol *lsym = copySymbol (sym);
4889 lsym->next = AST_VALUES (tree, sym);
4890 AST_VALUES (tree, sym) = lsym;
4894 addSymToBlock (sym, tree->left);
4895 addSymToBlock (sym, tree->right);
4898 /*-----------------------------------------------------------------*/
4899 /* processRegParms - do processing for register parameters */
4900 /*-----------------------------------------------------------------*/
4902 processRegParms (value * args, ast * body)
4906 if (IS_REGPARM (args->etype))
4907 addSymToBlock (args->sym, body);
4912 /*-----------------------------------------------------------------*/
4913 /* resetParmKey - resets the operandkeys for the symbols */
4914 /*-----------------------------------------------------------------*/
4915 DEFSETFUNC (resetParmKey)
4926 /*-----------------------------------------------------------------*/
4927 /* createFunction - This is the key node that calls the iCode for */
4928 /* generating the code for a function. Note code */
4929 /* is generated function by function, later when */
4930 /* add inter-procedural analysis this will change */
4931 /*-----------------------------------------------------------------*/
4933 createFunction (symbol * name, ast * body)
4939 iCode *piCode = NULL;
4941 if (getenv("SDCC_DEBUG_FUNCTION_POINTERS"))
4942 fprintf (stderr, "SDCCast.c:createFunction(%s)\n", name->name);
4944 /* if check function return 0 then some problem */
4945 if (checkFunction (name, NULL) == 0)
4948 /* create a dummy block if none exists */
4950 body = newNode (BLOCK, NULL, NULL);
4954 /* check if the function name already in the symbol table */
4955 if ((csym = findSym (SymbolTab, NULL, name->name)))
4958 /* special case for compiler defined functions
4959 we need to add the name to the publics list : this
4960 actually means we are now compiling the compiler
4964 addSet (&publics, name);
4970 allocVariables (name);
4972 name->lastLine = mylineno;
4975 /* set the stack pointer */
4976 /* PENDING: check this for the mcs51 */
4977 stackPtr = -port->stack.direction * port->stack.call_overhead;
4978 if (IFFUNC_ISISR (name->type))
4979 stackPtr -= port->stack.direction * port->stack.isr_overhead;
4980 if (IFFUNC_ISREENT (name->type) || options.stackAuto)
4981 stackPtr -= port->stack.direction * port->stack.reent_overhead;
4983 xstackPtr = -port->stack.direction * port->stack.call_overhead;
4985 fetype = getSpec (name->type); /* get the specifier for the function */
4986 /* if this is a reentrant function then */
4987 if (IFFUNC_ISREENT (name->type))
4990 allocParms (FUNC_ARGS(name->type)); /* allocate the parameters */
4992 /* do processing for parameters that are passed in registers */
4993 processRegParms (FUNC_ARGS(name->type), body);
4995 /* set the stack pointer */
4999 /* allocate & autoinit the block variables */
5000 processBlockVars (body, &stack, ALLOCATE);
5002 /* save the stack information */
5003 if (options.useXstack)
5004 name->xstack = SPEC_STAK (fetype) = stack;
5006 name->stack = SPEC_STAK (fetype) = stack;
5008 /* name needs to be mangled */
5009 SNPRINTF (name->rname, sizeof(name->rname), "%s%s", port->fun_prefix, name->name);
5011 body = resolveSymbols (body); /* resolve the symbols */
5012 body = decorateType (body); /* propagateType & do semantic checks */
5014 ex = newAst_VALUE (symbolVal (name)); /* create name */
5015 ex = newNode (FUNCTION, ex, body);
5016 ex->values.args = FUNC_ARGS(name->type);
5018 if (options.dump_tree) PA(ex);
5021 werror (E_FUNC_NO_CODE, name->name);
5025 /* create the node & generate intermediate code */
5027 codeOutFile = code->oFile;
5028 piCode = iCodeFromAst (ex);
5032 werror (E_FUNC_NO_CODE, name->name);
5036 eBBlockFromiCode (piCode);
5038 /* if there are any statics then do them */
5041 GcurMemmap = statsg;
5042 codeOutFile = statsg->oFile;
5043 eBBlockFromiCode (iCodeFromAst (decorateType (resolveSymbols (staticAutos))));
5049 /* dealloc the block variables */
5050 processBlockVars (body, &stack, DEALLOCATE);
5051 outputDebugStackSymbols();
5052 /* deallocate paramaters */
5053 deallocParms (FUNC_ARGS(name->type));
5055 if (IFFUNC_ISREENT (name->type))
5058 /* we are done freeup memory & cleanup */
5060 if (port->reset_labelKey) labelKey = 1;
5062 FUNC_HASBODY(name->type) = 1;
5063 addSet (&operKeyReset, name);
5064 applyToSet (operKeyReset, resetParmKey);
5069 cleanUpLevel (LabelTab, 0);
5070 cleanUpBlock (StructTab, 1);
5071 cleanUpBlock (TypedefTab, 1);
5073 xstack->syms = NULL;
5074 istack->syms = NULL;
5079 #define INDENT(x,f) { int i ; fprintf (f, "%d:", tree->lineno); for (i=0;i < x; i++) fprintf(f," "); }
5080 /*-----------------------------------------------------------------*/
5081 /* ast_print : prints the ast (for debugging purposes) */
5082 /*-----------------------------------------------------------------*/
5084 void ast_print (ast * tree, FILE *outfile, int indent)
5089 /* can print only decorated trees */
5090 if (!tree->decorated) return;
5092 /* if any child is an error | this one is an error do nothing */
5093 if (tree->isError ||
5094 (tree->left && tree->left->isError) ||
5095 (tree->right && tree->right->isError)) {
5096 fprintf(outfile,"ERROR_NODE(%p)\n",tree);
5100 /* print the line */
5101 /* if not block & function */
5102 if (tree->type == EX_OP &&
5103 (tree->opval.op != FUNCTION &&
5104 tree->opval.op != BLOCK &&
5105 tree->opval.op != NULLOP)) {
5108 if (tree->opval.op == FUNCTION) {
5110 value *args=FUNC_ARGS(tree->left->opval.val->type);
5111 fprintf(outfile,"FUNCTION (%s=%p) type (",
5112 tree->left->opval.val->name, tree);
5113 printTypeChain (tree->left->opval.val->type->next,outfile);
5114 fprintf(outfile,") args (");
5117 fprintf (outfile, ", ");
5119 printTypeChain (args ? args->type : NULL, outfile);
5121 args= args ? args->next : NULL;
5123 fprintf(outfile,")\n");
5124 ast_print(tree->left,outfile,indent);
5125 ast_print(tree->right,outfile,indent);
5128 if (tree->opval.op == BLOCK) {
5129 symbol *decls = tree->values.sym;
5130 INDENT(indent,outfile);
5131 fprintf(outfile,"{\n");
5133 INDENT(indent+2,outfile);
5134 fprintf(outfile,"DECLARE SYMBOL (%s=%p) type (",
5135 decls->name, decls);
5136 printTypeChain(decls->type,outfile);
5137 fprintf(outfile,")\n");
5139 decls = decls->next;
5141 ast_print(tree->right,outfile,indent+2);
5142 INDENT(indent,outfile);
5143 fprintf(outfile,"}\n");
5146 if (tree->opval.op == NULLOP) {
5147 ast_print(tree->left,outfile,indent);
5148 ast_print(tree->right,outfile,indent);
5151 INDENT(indent,outfile);
5153 /*------------------------------------------------------------------*/
5154 /*----------------------------*/
5155 /* leaf has been reached */
5156 /*----------------------------*/
5157 /* if this is of type value */
5158 /* just get the type */
5159 if (tree->type == EX_VALUE) {
5161 if (IS_LITERAL (tree->opval.val->etype)) {
5162 fprintf(outfile,"CONSTANT (%p) value = ", tree);
5163 if (SPEC_USIGN (tree->opval.val->etype))
5164 fprintf(outfile,"%u", (TYPE_UDWORD) floatFromVal(tree->opval.val));
5166 fprintf(outfile,"%d", (TYPE_DWORD) floatFromVal(tree->opval.val));
5167 fprintf(outfile,", 0x%x, %f", (TYPE_UDWORD) floatFromVal(tree->opval.val),
5168 floatFromVal(tree->opval.val));
5169 } else if (tree->opval.val->sym) {
5170 /* if the undefined flag is set then give error message */
5171 if (tree->opval.val->sym->undefined) {
5172 fprintf(outfile,"UNDEFINED SYMBOL ");
5174 fprintf(outfile,"SYMBOL ");
5176 fprintf(outfile,"(%s=%p)",
5177 tree->opval.val->sym->name,tree);
5180 fprintf(outfile," type (");
5181 printTypeChain(tree->ftype,outfile);
5182 fprintf(outfile,")\n");
5184 fprintf(outfile,"\n");
5189 /* if type link for the case of cast */
5190 if (tree->type == EX_LINK) {
5191 fprintf(outfile,"TYPENODE (%p) type = (",tree);
5192 printTypeChain(tree->opval.lnk,outfile);
5193 fprintf(outfile,")\n");
5198 /* depending on type of operator do */
5200 switch (tree->opval.op) {
5201 /*------------------------------------------------------------------*/
5202 /*----------------------------*/
5204 /*----------------------------*/
5206 fprintf(outfile,"ARRAY_OP (%p) type (",tree);
5207 printTypeChain(tree->ftype,outfile);
5208 fprintf(outfile,")\n");
5209 ast_print(tree->left,outfile,indent+2);
5210 ast_print(tree->right,outfile,indent+2);
5213 /*------------------------------------------------------------------*/
5214 /*----------------------------*/
5216 /*----------------------------*/
5218 fprintf(outfile,"STRUCT_ACCESS (%p) type (",tree);
5219 printTypeChain(tree->ftype,outfile);
5220 fprintf(outfile,")\n");
5221 ast_print(tree->left,outfile,indent+2);
5222 ast_print(tree->right,outfile,indent+2);
5225 /*------------------------------------------------------------------*/
5226 /*----------------------------*/
5227 /* struct/union pointer */
5228 /*----------------------------*/
5230 fprintf(outfile,"PTR_ACCESS (%p) type (",tree);
5231 printTypeChain(tree->ftype,outfile);
5232 fprintf(outfile,")\n");
5233 ast_print(tree->left,outfile,indent+2);
5234 ast_print(tree->right,outfile,indent+2);
5237 /*------------------------------------------------------------------*/
5238 /*----------------------------*/
5239 /* ++/-- operation */
5240 /*----------------------------*/
5243 fprintf(outfile,"post-");
5245 fprintf(outfile,"pre-");
5246 fprintf(outfile,"INC_OP (%p) type (",tree);
5247 printTypeChain(tree->ftype,outfile);
5248 fprintf(outfile,")\n");
5249 ast_print(tree->left,outfile,indent+2); /* postincrement case */
5250 ast_print(tree->right,outfile,indent+2); /* preincrement case */
5255 fprintf(outfile,"post-");
5257 fprintf(outfile,"pre-");
5258 fprintf(outfile,"DEC_OP (%p) type (",tree);
5259 printTypeChain(tree->ftype,outfile);
5260 fprintf(outfile,")\n");
5261 ast_print(tree->left,outfile,indent+2); /* postdecrement case */
5262 ast_print(tree->right,outfile,indent+2); /* predecrement case */
5265 /*------------------------------------------------------------------*/
5266 /*----------------------------*/
5268 /*----------------------------*/
5271 fprintf(outfile,"& (%p) type (",tree);
5272 printTypeChain(tree->ftype,outfile);
5273 fprintf(outfile,")\n");
5274 ast_print(tree->left,outfile,indent+2);
5275 ast_print(tree->right,outfile,indent+2);
5277 fprintf(outfile,"ADDRESS_OF (%p) type (",tree);
5278 printTypeChain(tree->ftype,outfile);
5279 fprintf(outfile,")\n");
5280 ast_print(tree->left,outfile,indent+2);
5281 ast_print(tree->right,outfile,indent+2);
5284 /*----------------------------*/
5286 /*----------------------------*/
5288 fprintf(outfile,"OR (%p) type (",tree);
5289 printTypeChain(tree->ftype,outfile);
5290 fprintf(outfile,")\n");
5291 ast_print(tree->left,outfile,indent+2);
5292 ast_print(tree->right,outfile,indent+2);
5294 /*------------------------------------------------------------------*/
5295 /*----------------------------*/
5297 /*----------------------------*/
5299 fprintf(outfile,"XOR (%p) type (",tree);
5300 printTypeChain(tree->ftype,outfile);
5301 fprintf(outfile,")\n");
5302 ast_print(tree->left,outfile,indent+2);
5303 ast_print(tree->right,outfile,indent+2);
5306 /*------------------------------------------------------------------*/
5307 /*----------------------------*/
5309 /*----------------------------*/
5311 fprintf(outfile,"DIV (%p) type (",tree);
5312 printTypeChain(tree->ftype,outfile);
5313 fprintf(outfile,")\n");
5314 ast_print(tree->left,outfile,indent+2);
5315 ast_print(tree->right,outfile,indent+2);
5317 /*------------------------------------------------------------------*/
5318 /*----------------------------*/
5320 /*----------------------------*/
5322 fprintf(outfile,"MOD (%p) type (",tree);
5323 printTypeChain(tree->ftype,outfile);
5324 fprintf(outfile,")\n");
5325 ast_print(tree->left,outfile,indent+2);
5326 ast_print(tree->right,outfile,indent+2);
5329 /*------------------------------------------------------------------*/
5330 /*----------------------------*/
5331 /* address dereference */
5332 /*----------------------------*/
5333 case '*': /* can be unary : if right is null then unary operation */
5335 fprintf(outfile,"DEREF (%p) type (",tree);
5336 printTypeChain(tree->ftype,outfile);
5337 fprintf(outfile,")\n");
5338 ast_print(tree->left,outfile,indent+2);
5341 /*------------------------------------------------------------------*/
5342 /*----------------------------*/
5343 /* multiplication */
5344 /*----------------------------*/
5345 fprintf(outfile,"MULT (%p) type (",tree);
5346 printTypeChain(tree->ftype,outfile);
5347 fprintf(outfile,")\n");
5348 ast_print(tree->left,outfile,indent+2);
5349 ast_print(tree->right,outfile,indent+2);
5353 /*------------------------------------------------------------------*/
5354 /*----------------------------*/
5355 /* unary '+' operator */
5356 /*----------------------------*/
5360 fprintf(outfile,"UPLUS (%p) type (",tree);
5361 printTypeChain(tree->ftype,outfile);
5362 fprintf(outfile,")\n");
5363 ast_print(tree->left,outfile,indent+2);
5365 /*------------------------------------------------------------------*/
5366 /*----------------------------*/
5368 /*----------------------------*/
5369 fprintf(outfile,"ADD (%p) type (",tree);
5370 printTypeChain(tree->ftype,outfile);
5371 fprintf(outfile,")\n");
5372 ast_print(tree->left,outfile,indent+2);
5373 ast_print(tree->right,outfile,indent+2);
5376 /*------------------------------------------------------------------*/
5377 /*----------------------------*/
5379 /*----------------------------*/
5380 case '-': /* can be unary */
5382 fprintf(outfile,"UMINUS (%p) type (",tree);
5383 printTypeChain(tree->ftype,outfile);
5384 fprintf(outfile,")\n");
5385 ast_print(tree->left,outfile,indent+2);
5387 /*------------------------------------------------------------------*/
5388 /*----------------------------*/
5390 /*----------------------------*/
5391 fprintf(outfile,"SUB (%p) type (",tree);
5392 printTypeChain(tree->ftype,outfile);
5393 fprintf(outfile,")\n");
5394 ast_print(tree->left,outfile,indent+2);
5395 ast_print(tree->right,outfile,indent+2);
5398 /*------------------------------------------------------------------*/
5399 /*----------------------------*/
5401 /*----------------------------*/
5403 fprintf(outfile,"COMPL (%p) type (",tree);
5404 printTypeChain(tree->ftype,outfile);
5405 fprintf(outfile,")\n");
5406 ast_print(tree->left,outfile,indent+2);
5408 /*------------------------------------------------------------------*/
5409 /*----------------------------*/
5411 /*----------------------------*/
5413 fprintf(outfile,"NOT (%p) type (",tree);
5414 printTypeChain(tree->ftype,outfile);
5415 fprintf(outfile,")\n");
5416 ast_print(tree->left,outfile,indent+2);
5418 /*------------------------------------------------------------------*/
5419 /*----------------------------*/
5421 /*----------------------------*/
5423 fprintf(outfile,"RRC (%p) type (",tree);
5424 printTypeChain(tree->ftype,outfile);
5425 fprintf(outfile,")\n");
5426 ast_print(tree->left,outfile,indent+2);
5430 fprintf(outfile,"RLC (%p) type (",tree);
5431 printTypeChain(tree->ftype,outfile);
5432 fprintf(outfile,")\n");
5433 ast_print(tree->left,outfile,indent+2);
5436 fprintf(outfile,"SWAP (%p) type (",tree);
5437 printTypeChain(tree->ftype,outfile);
5438 fprintf(outfile,")\n");
5439 ast_print(tree->left,outfile,indent+2);
5442 fprintf(outfile,"GETHBIT (%p) type (",tree);
5443 printTypeChain(tree->ftype,outfile);
5444 fprintf(outfile,")\n");
5445 ast_print(tree->left,outfile,indent+2);
5448 fprintf(outfile,"LEFT_SHIFT (%p) type (",tree);
5449 printTypeChain(tree->ftype,outfile);
5450 fprintf(outfile,")\n");
5451 ast_print(tree->left,outfile,indent+2);
5452 ast_print(tree->right,outfile,indent+2);
5455 fprintf(outfile,"RIGHT_SHIFT (%p) type (",tree);
5456 printTypeChain(tree->ftype,outfile);
5457 fprintf(outfile,")\n");
5458 ast_print(tree->left,outfile,indent+2);
5459 ast_print(tree->right,outfile,indent+2);
5461 /*------------------------------------------------------------------*/
5462 /*----------------------------*/
5464 /*----------------------------*/
5465 case CAST: /* change the type */
5466 fprintf(outfile,"CAST (%p) from type (",tree);
5467 printTypeChain(tree->right->ftype,outfile);
5468 fprintf(outfile,") to type (");
5469 printTypeChain(tree->ftype,outfile);
5470 fprintf(outfile,")\n");
5471 ast_print(tree->right,outfile,indent+2);
5475 fprintf(outfile,"ANDAND (%p) type (",tree);
5476 printTypeChain(tree->ftype,outfile);
5477 fprintf(outfile,")\n");
5478 ast_print(tree->left,outfile,indent+2);
5479 ast_print(tree->right,outfile,indent+2);
5482 fprintf(outfile,"OROR (%p) type (",tree);
5483 printTypeChain(tree->ftype,outfile);
5484 fprintf(outfile,")\n");
5485 ast_print(tree->left,outfile,indent+2);
5486 ast_print(tree->right,outfile,indent+2);
5489 /*------------------------------------------------------------------*/
5490 /*----------------------------*/
5491 /* comparison operators */
5492 /*----------------------------*/
5494 fprintf(outfile,"GT(>) (%p) type (",tree);
5495 printTypeChain(tree->ftype,outfile);
5496 fprintf(outfile,")\n");
5497 ast_print(tree->left,outfile,indent+2);
5498 ast_print(tree->right,outfile,indent+2);
5501 fprintf(outfile,"LT(<) (%p) type (",tree);
5502 printTypeChain(tree->ftype,outfile);
5503 fprintf(outfile,")\n");
5504 ast_print(tree->left,outfile,indent+2);
5505 ast_print(tree->right,outfile,indent+2);
5508 fprintf(outfile,"LE(<=) (%p) type (",tree);
5509 printTypeChain(tree->ftype,outfile);
5510 fprintf(outfile,")\n");
5511 ast_print(tree->left,outfile,indent+2);
5512 ast_print(tree->right,outfile,indent+2);
5515 fprintf(outfile,"GE(>=) (%p) type (",tree);
5516 printTypeChain(tree->ftype,outfile);
5517 fprintf(outfile,")\n");
5518 ast_print(tree->left,outfile,indent+2);
5519 ast_print(tree->right,outfile,indent+2);
5522 fprintf(outfile,"EQ(==) (%p) type (",tree);
5523 printTypeChain(tree->ftype,outfile);
5524 fprintf(outfile,")\n");
5525 ast_print(tree->left,outfile,indent+2);
5526 ast_print(tree->right,outfile,indent+2);
5529 fprintf(outfile,"NE(!=) (%p) type (",tree);
5530 printTypeChain(tree->ftype,outfile);
5531 fprintf(outfile,")\n");
5532 ast_print(tree->left,outfile,indent+2);
5533 ast_print(tree->right,outfile,indent+2);
5534 /*------------------------------------------------------------------*/
5535 /*----------------------------*/
5537 /*----------------------------*/
5538 case SIZEOF: /* evaluate wihout code generation */
5539 fprintf(outfile,"SIZEOF %d\n",(getSize (tree->right->ftype)));
5542 /*------------------------------------------------------------------*/
5543 /*----------------------------*/
5544 /* conditional operator '?' */
5545 /*----------------------------*/
5547 fprintf(outfile,"QUEST(?) (%p) type (",tree);
5548 printTypeChain(tree->ftype,outfile);
5549 fprintf(outfile,")\n");
5550 ast_print(tree->left,outfile,indent+2);
5551 ast_print(tree->right,outfile,indent+2);
5555 fprintf(outfile,"COLON(:) (%p) type (",tree);
5556 printTypeChain(tree->ftype,outfile);
5557 fprintf(outfile,")\n");
5558 ast_print(tree->left,outfile,indent+2);
5559 ast_print(tree->right,outfile,indent+2);
5562 /*------------------------------------------------------------------*/
5563 /*----------------------------*/
5564 /* assignment operators */
5565 /*----------------------------*/
5567 fprintf(outfile,"MULASS(*=) (%p) type (",tree);
5568 printTypeChain(tree->ftype,outfile);
5569 fprintf(outfile,")\n");
5570 ast_print(tree->left,outfile,indent+2);
5571 ast_print(tree->right,outfile,indent+2);
5574 fprintf(outfile,"DIVASS(/=) (%p) type (",tree);
5575 printTypeChain(tree->ftype,outfile);
5576 fprintf(outfile,")\n");
5577 ast_print(tree->left,outfile,indent+2);
5578 ast_print(tree->right,outfile,indent+2);
5581 fprintf(outfile,"ANDASS(&=) (%p) type (",tree);
5582 printTypeChain(tree->ftype,outfile);
5583 fprintf(outfile,")\n");
5584 ast_print(tree->left,outfile,indent+2);
5585 ast_print(tree->right,outfile,indent+2);
5588 fprintf(outfile,"ORASS(|=) (%p) type (",tree);
5589 printTypeChain(tree->ftype,outfile);
5590 fprintf(outfile,")\n");
5591 ast_print(tree->left,outfile,indent+2);
5592 ast_print(tree->right,outfile,indent+2);
5595 fprintf(outfile,"XORASS(^=) (%p) type (",tree);
5596 printTypeChain(tree->ftype,outfile);
5597 fprintf(outfile,")\n");
5598 ast_print(tree->left,outfile,indent+2);
5599 ast_print(tree->right,outfile,indent+2);
5602 fprintf(outfile,"RSHFTASS(>>=) (%p) type (",tree);
5603 printTypeChain(tree->ftype,outfile);
5604 fprintf(outfile,")\n");
5605 ast_print(tree->left,outfile,indent+2);
5606 ast_print(tree->right,outfile,indent+2);
5609 fprintf(outfile,"LSHFTASS(<<=) (%p) type (",tree);
5610 printTypeChain(tree->ftype,outfile);
5611 fprintf(outfile,")\n");
5612 ast_print(tree->left,outfile,indent+2);
5613 ast_print(tree->right,outfile,indent+2);
5615 /*------------------------------------------------------------------*/
5616 /*----------------------------*/
5618 /*----------------------------*/
5620 fprintf(outfile,"SUBASS(-=) (%p) type (",tree);
5621 printTypeChain(tree->ftype,outfile);
5622 fprintf(outfile,")\n");
5623 ast_print(tree->left,outfile,indent+2);
5624 ast_print(tree->right,outfile,indent+2);
5626 /*------------------------------------------------------------------*/
5627 /*----------------------------*/
5629 /*----------------------------*/
5631 fprintf(outfile,"ADDASS(+=) (%p) type (",tree);
5632 printTypeChain(tree->ftype,outfile);
5633 fprintf(outfile,")\n");
5634 ast_print(tree->left,outfile,indent+2);
5635 ast_print(tree->right,outfile,indent+2);
5637 /*------------------------------------------------------------------*/
5638 /*----------------------------*/
5639 /* straight assignemnt */
5640 /*----------------------------*/
5642 fprintf(outfile,"ASSIGN(=) (%p) type (",tree);
5643 printTypeChain(tree->ftype,outfile);
5644 fprintf(outfile,")\n");
5645 ast_print(tree->left,outfile,indent+2);
5646 ast_print(tree->right,outfile,indent+2);
5648 /*------------------------------------------------------------------*/
5649 /*----------------------------*/
5650 /* comma operator */
5651 /*----------------------------*/
5653 fprintf(outfile,"COMMA(,) (%p) type (",tree);
5654 printTypeChain(tree->ftype,outfile);
5655 fprintf(outfile,")\n");
5656 ast_print(tree->left,outfile,indent+2);
5657 ast_print(tree->right,outfile,indent+2);
5659 /*------------------------------------------------------------------*/
5660 /*----------------------------*/
5662 /*----------------------------*/
5665 fprintf(outfile,"CALL (%p) type (",tree);
5666 printTypeChain(tree->ftype,outfile);
5667 fprintf(outfile,")\n");
5668 ast_print(tree->left,outfile,indent+2);
5669 ast_print(tree->right,outfile,indent+2);
5672 fprintf(outfile,"PARMS\n");
5673 ast_print(tree->left,outfile,indent+2);
5674 if (tree->right /*&& !IS_AST_PARAM(tree->right)*/) {
5675 ast_print(tree->right,outfile,indent+2);
5678 /*------------------------------------------------------------------*/
5679 /*----------------------------*/
5680 /* return statement */
5681 /*----------------------------*/
5683 fprintf(outfile,"RETURN (%p) type (",tree);
5685 printTypeChain(tree->right->ftype,outfile);
5687 fprintf(outfile,")\n");
5688 ast_print(tree->right,outfile,indent+2);
5690 /*------------------------------------------------------------------*/
5691 /*----------------------------*/
5692 /* label statement */
5693 /*----------------------------*/
5695 fprintf(outfile,"LABEL (%p)\n",tree);
5696 ast_print(tree->left,outfile,indent+2);
5697 ast_print(tree->right,outfile,indent);
5699 /*------------------------------------------------------------------*/
5700 /*----------------------------*/
5701 /* switch statement */
5702 /*----------------------------*/
5706 fprintf(outfile,"SWITCH (%p) ",tree);
5707 ast_print(tree->left,outfile,0);
5708 for (val = tree->values.switchVals.swVals; val ; val = val->next) {
5709 INDENT(indent+2,outfile);
5710 fprintf(outfile,"CASE 0x%x GOTO _case_%d_%d\n",
5711 (int) floatFromVal(val),
5712 tree->values.switchVals.swNum,
5713 (int) floatFromVal(val));
5715 ast_print(tree->right,outfile,indent);
5718 /*------------------------------------------------------------------*/
5719 /*----------------------------*/
5721 /*----------------------------*/
5723 fprintf(outfile,"IF (%p) \n",tree);
5724 ast_print(tree->left,outfile,indent+2);
5725 if (tree->trueLabel) {
5726 INDENT(indent+2,outfile);
5727 fprintf(outfile,"NE(!=) 0 goto %s\n",tree->trueLabel->name);
5729 if (tree->falseLabel) {
5730 INDENT(indent+2,outfile);
5731 fprintf(outfile,"EQ(==) 0 goto %s\n",tree->falseLabel->name);
5733 ast_print(tree->right,outfile,indent+2);
5735 /*----------------------------*/
5736 /* goto Statement */
5737 /*----------------------------*/
5739 fprintf(outfile,"GOTO (%p) \n",tree);
5740 ast_print(tree->left,outfile,indent+2);
5741 fprintf(outfile,"\n");
5743 /*------------------------------------------------------------------*/
5744 /*----------------------------*/
5746 /*----------------------------*/
5748 fprintf(outfile,"FOR (%p) \n",tree);
5749 if (AST_FOR( tree, initExpr)) {
5750 INDENT(indent+2,outfile);
5751 fprintf(outfile,"INIT EXPR ");
5752 ast_print(AST_FOR(tree, initExpr),outfile,indent+2);
5754 if (AST_FOR( tree, condExpr)) {
5755 INDENT(indent+2,outfile);
5756 fprintf(outfile,"COND EXPR ");
5757 ast_print(AST_FOR(tree, condExpr),outfile,indent+2);
5759 if (AST_FOR( tree, loopExpr)) {
5760 INDENT(indent+2,outfile);
5761 fprintf(outfile,"LOOP EXPR ");
5762 ast_print(AST_FOR(tree, loopExpr),outfile,indent+2);
5764 fprintf(outfile,"FOR LOOP BODY \n");
5765 ast_print(tree->left,outfile,indent+2);
5768 fprintf(outfile,"CRITICAL (%p) \n",tree);
5769 ast_print(tree->left,outfile,indent+2);
5777 ast_print(t,stdout,0);
5782 /*-----------------------------------------------------------------*/
5783 /* astErrors : returns non-zero if errors present in tree */
5784 /*-----------------------------------------------------------------*/
5785 int astErrors(ast *t)
5794 if (t->type == EX_VALUE
5795 && t->opval.val->sym
5796 && t->opval.val->sym->undefined)
5799 errors += astErrors(t->left);
5800 errors += astErrors(t->right);