1 /*-----------------------------------------------------------------------
3 SDCC.y - parser definition file for sdcc :
4 Written By : Sandeep Dutta . sandeep.dutta@usa.net (1997)
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 -------------------------------------------------------------------------*/
28 #include "SDCCglobl.h"
30 #include "SDCChasht.h"
38 extern int yyerror (char *);
40 int NestLevel = 0 ; /* current NestLevel */
41 int stackPtr = 1 ; /* stack pointer */
42 int xstackPtr = 0 ; /* xstack pointer */
44 int blockNo = 0 ; /* sequential block number */
49 char lbuff[1024]; /* local buffer */
51 /* break & continue stacks */
52 STACK_DCL(continueStack ,symbol *,MAX_NEST_LEVEL)
53 STACK_DCL(breakStack ,symbol *,MAX_NEST_LEVEL)
54 STACK_DCL(forStack ,symbol *,MAX_NEST_LEVEL)
55 STACK_DCL(swStk ,ast *,MAX_NEST_LEVEL)
56 STACK_DCL(blockNum,int,MAX_NEST_LEVEL*3)
58 value *cenum = NULL ; /* current enumeration type chain*/
64 symbol *sym ; /* symbol table pointer */
65 structdef *sdef; /* structure definition */
66 char yychar[SDCC_NAME_MAX+1];
67 sym_link *lnk ; /* declarator or specifier */
68 int yyint; /* integer value returned */
69 value *val ; /* for integer constant */
70 initList *ilist; /* initial list */
71 char *yyinline; /* inlined assembler code */
72 ast *asts; /* expression tree */
75 %token <yychar> IDENTIFIER TYPE_NAME
76 %token <val> CONSTANT STRING_LITERAL
78 %token PTR_OP INC_OP DEC_OP LEFT_OP RIGHT_OP LE_OP GE_OP EQ_OP NE_OP
80 %token <yyint> MUL_ASSIGN DIV_ASSIGN MOD_ASSIGN ADD_ASSIGN
81 %token <yyint> SUB_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN
82 %token <yyint> XOR_ASSIGN OR_ASSIGN
83 %token TYPEDEF EXTERN STATIC AUTO REGISTER CODE EEPROM INTERRUPT SFR AT SBIT
84 %token REENTRANT USING XDATA DATA IDATA PDATA VAR_ARGS CRITICAL NONBANKED BANKED
85 %token CHAR SHORT INT LONG SIGNED UNSIGNED FLOAT DOUBLE CONST VOLATILE VOID BIT
86 %token STRUCT UNION ENUM ELIPSIS RANGE FAR
87 %token CASE DEFAULT IF ELSE SWITCH WHILE DO FOR GOTO CONTINUE BREAK RETURN
89 %token <yyinline> INLINEASM
90 %token IFX ADDRESS_OF GET_VALUE_AT_ADDRESS SPIL UNSPIL GETHBIT
91 %token BITWISEAND UNARYMINUS IPUSH IPOP PCALL ENDFUNCTION JUMPTABLE
93 %token CAST CALL PARAM NULLOP BLOCK LABEL RECEIVE SEND ARRAYINIT
95 %type <yyint> Interrupt_storage
96 %type <sym> identifier declarator declarator2 enumerator_list enumerator
97 %type <sym> struct_declarator
98 %type <sym> struct_declarator_list struct_declaration struct_declaration_list
99 %type <sym> declaration init_declarator_list init_declarator
100 %type <sym> declaration_list identifier_list parameter_identifier_list
101 %type <sym> declarator2_function_attributes while do for
102 %type <lnk> pointer type_specifier_list type_specifier type_name
103 %type <lnk> storage_class_specifier struct_or_union_specifier
104 %type <lnk> declaration_specifiers sfr_reg_bit type_specifier2
105 %type <lnk> function_attribute function_attributes enum_specifier
106 %type <lnk> abstract_declarator abstract_declarator2 unqualified_pointer
107 %type <val> parameter_type_list parameter_list parameter_declaration opt_assign_expr
108 %type <sdef> stag opt_stag
109 %type <asts> primary_expr
110 %type <asts> postfix_expr unary_expr cast_expr multiplicative_expr
111 %type <asts> additive_expr shift_expr relational_expr equality_expr
112 %type <asts> and_expr exclusive_or_expr inclusive_or_expr logical_or_expr
113 %type <asts> logical_and_expr conditional_expr assignment_expr constant_expr
114 %type <asts> expr argument_expr_list function_definition expr_opt
115 %type <asts> statement_list statement labeled_statement compound_statement
116 %type <asts> expression_statement selection_statement iteration_statement
117 %type <asts> jump_statement function_body else_statement string_literal
118 %type <ilist> initializer initializer_list
119 %type <yyint> unary_operator assignment_operator struct_or_union
126 : external_definition
127 | file external_definition
131 : function_definition {
136 && IS_FUNC($1->type))
138 /* The only legal storage classes for
139 * a function prototype (declaration)
140 * are extern and static. extern is the
141 * default. Thus, if this function isn't
142 * explicitly marked static, mark it
146 && IS_SPEC($1->etype)
147 && !SPEC_STAT($1->etype))
149 SPEC_EXTR($1->etype) = 1;
153 allocVariables ($1) ;
154 cleanUpLevel (SymbolTab,1);
159 : declarator function_body { /* function type not specified */
160 /* assume it to be 'int' */
161 addDecl($1,0,newIntLink());
162 $$ = createFunction($1,$2);
164 | declaration_specifiers declarator function_body
166 pointerTypes($2->type,copyLinkChain($1));
168 $$ = createFunction($2,$3);
173 : function_attributes
174 | function_attributes function_attribute { $$ = mergeSpec($1,$2,"function_attribute"); }
180 $$->class = SPECIFIER ;
181 FUNC_REGBANK($$) = (int) floatFromVal($2);
183 | REENTRANT { $$ = newLink ();
184 $$->class = SPECIFIER ;
187 | CRITICAL { $$ = newLink ();
188 $$->class = SPECIFIER ;
189 FUNC_ISCRITICAL($$) = 1;
191 | NAKED { $$ = newLink ();
192 $$->class = SPECIFIER ;
195 | NONBANKED {$$ = newLink ();
196 $$->class = SPECIFIER ;
197 FUNC_NONBANKED($$) = 1;
198 if (FUNC_BANKED($$)) {
199 werror(W_BANKED_WITH_NONBANKED);
202 | BANKED {$$ = newLink ();
203 $$->class = SPECIFIER ;
205 if (FUNC_NONBANKED($$)) {
206 werror(W_BANKED_WITH_NONBANKED);
209 werror(W_BANKED_WITH_STATIC);
215 $$->class = SPECIFIER ;
216 FUNC_INTNO($$) = $1 ;
223 | declaration_list compound_statement
225 werror(E_OLD_STYLE,($1 ? $1->name: "")) ;
231 : identifier { $$ = newAst_VALUE(symbolVal($1)); }
232 | CONSTANT { $$ = newAst_VALUE($1); }
234 | '(' expr ')' { $$ = $2 ; }
238 : STRING_LITERAL { $$ = newAst_VALUE($1); }
243 | postfix_expr '[' expr ']' { $$ = newNode ('[', $1, $3) ; }
244 | postfix_expr '(' ')' { $$ = newNode (CALL,$1,NULL);
245 $$->left->funcName = 1;}
246 | postfix_expr '(' argument_expr_list ')'
248 $$ = newNode (CALL,$1,$3) ; $$->left->funcName = 1;
250 | postfix_expr '.' identifier
252 $3 = newSymbol($3->name,NestLevel);
254 $$ = newNode(PTR_OP,newNode('&',$1,NULL),newAst_VALUE(symbolVal($3)));
255 /* $$ = newNode('.',$1,newAst(EX_VALUE,symbolVal($3))) ; */
257 | postfix_expr PTR_OP identifier
259 $3 = newSymbol($3->name,NestLevel);
261 $$ = newNode(PTR_OP,$1,newAst_VALUE(symbolVal($3)));
263 | postfix_expr INC_OP
264 { $$ = newNode(INC_OP,$1,NULL);}
265 | postfix_expr DEC_OP
266 { $$ = newNode(DEC_OP,$1,NULL); }
271 | assignment_expr ',' argument_expr_list { $$ = newNode(PARAM,$1,$3); }
276 | INC_OP unary_expr { $$ = newNode(INC_OP,NULL,$2); }
277 | DEC_OP unary_expr { $$ = newNode(DEC_OP,NULL,$2); }
278 | unary_operator cast_expr { $$ = newNode($1,$2,NULL) ; }
279 | SIZEOF unary_expr { $$ = newNode(SIZEOF,NULL,$2); }
280 | SIZEOF '(' type_name ')' { $$ = newAst_VALUE(sizeofOp($3)); }
294 | '(' type_name ')' cast_expr { $$ = newNode(CAST,newAst_LINK($2),$4); }
299 | multiplicative_expr '*' cast_expr { $$ = newNode('*',$1,$3);}
300 | multiplicative_expr '/' cast_expr { $$ = newNode('/',$1,$3);}
301 | multiplicative_expr '%' cast_expr { $$ = newNode('%',$1,$3);}
305 : multiplicative_expr
306 | additive_expr '+' multiplicative_expr { $$=newNode('+',$1,$3);}
307 | additive_expr '-' multiplicative_expr { $$=newNode('-',$1,$3);}
312 | shift_expr LEFT_OP additive_expr { $$ = newNode(LEFT_OP,$1,$3); }
313 | shift_expr RIGHT_OP additive_expr { $$ = newNode(RIGHT_OP,$1,$3); }
318 | relational_expr '<' shift_expr {
320 newNode('!',newNode(GE_OP,$1,$3),NULL) :
321 newNode('<', $1,$3));
323 | relational_expr '>' shift_expr {
325 newNode('!',newNode(LE_OP,$1,$3),NULL) :
328 | relational_expr LE_OP shift_expr {
330 newNode('!', newNode('>', $1 , $3 ), NULL) :
331 newNode(LE_OP,$1,$3));
333 | relational_expr GE_OP shift_expr {
335 newNode('!', newNode('<', $1 , $3 ), NULL) :
336 newNode(GE_OP,$1,$3));
342 | equality_expr EQ_OP relational_expr {
344 newNode('!',newNode(NE_OP,$1,$3),NULL) :
345 newNode(EQ_OP,$1,$3));
347 | equality_expr NE_OP relational_expr {
349 newNode('!', newNode(EQ_OP,$1,$3), NULL) :
350 newNode(NE_OP,$1,$3));
356 | and_expr '&' equality_expr { $$ = newNode('&',$1,$3);}
361 | exclusive_or_expr '^' and_expr { $$ = newNode('^',$1,$3);}
366 | inclusive_or_expr '|' exclusive_or_expr { $$ = newNode('|',$1,$3);}
371 | logical_and_expr AND_OP inclusive_or_expr
372 { $$ = newNode(AND_OP,$1,$3);}
377 | logical_or_expr OR_OP logical_and_expr
378 { $$ = newNode(OR_OP,$1,$3); }
383 | logical_or_expr '?' logical_or_expr ':' conditional_expr
385 $$ = newNode(':',$3,$5) ;
386 $$ = newNode('?',$1,$$) ;
392 | unary_expr assignment_operator assignment_expr
397 $$ = newNode($2,$1,$3);
400 $$ = newNode('=',$1,newNode('*',copyAst($1),$3));
403 $$ = newNode('=',$1,newNode('/',copyAst($1),$3));
406 $$ = newNode('=',$1,newNode('%',copyAst($1),$3));
409 $$ = newNode('=',$1,newNode('+',copyAst($1),$3));
412 $$ = newNode('=',$1,newNode('-',copyAst($1),$3));
415 $$ = newNode('=',$1,newNode(LEFT_OP,copyAst($1),$3));
418 $$ = newNode('=',$1,newNode(RIGHT_OP,copyAst($1),$3));
421 $$ = newNode('=',$1,newNode('&',copyAst($1),$3));
424 $$ = newNode('=',$1,newNode('^',copyAst($1),$3));
427 $$ = newNode('=',$1,newNode('|',copyAst($1),$3));
452 | expr ',' assignment_expr { $$ = newNode(',',$1,$3);}
460 : declaration_specifiers ';' { $$ = NULL ; }
461 | declaration_specifiers init_declarator_list ';'
463 /* add the specifier list to the id */
466 for (sym1 = sym = reverseSyms($2);sym != NULL;sym = sym->next) {
467 sym_link *lnk = copyLinkChain($1);
468 /* do the pointer stuff */
469 pointerTypes(sym->type,lnk);
470 addDecl (sym,0,lnk) ;
477 declaration_specifiers
478 : storage_class_specifier { $$ = $1; }
479 | storage_class_specifier declaration_specifiers {
480 /* if the decl $2 is not a specifier */
481 /* find the spec and replace it */
484 while (lnk && !IS_SPEC(lnk->next))
486 lnk->next = mergeSpec($1,lnk->next, yytext);
490 $$ = mergeSpec($1,$2, yytext);
492 | type_specifier { $$ = $1; }
493 | type_specifier declaration_specifiers {
494 /* if the decl $2 is not a specifier */
495 /* find the spec and replace it */
498 while (lnk && !IS_SPEC(lnk->next))
500 lnk->next = mergeSpec($1,lnk->next, yytext);
504 $$ = mergeSpec($1,$2, yytext);
510 | init_declarator_list ',' init_declarator { $3->next = $1 ; $$ = $3;}
514 : declarator { $1->ival = NULL ; }
515 | declarator '=' initializer { $1->ival = $3 ; }
519 storage_class_specifier
522 $$->class = SPECIFIER ;
523 SPEC_TYPEDEF($$) = 1 ;
527 $$->class = SPECIFIER ;
532 $$->class = SPECIFIER ;
537 $$->class = SPECIFIER ;
538 SPEC_SCLS($$) = S_AUTO ;
542 $$->class = SPECIFIER ;
543 SPEC_SCLS($$) = S_REGISTER ;
548 : INTERRUPT CONSTANT { $$ = (int) floatFromVal($2) ; }
553 | type_specifier2 AT constant_expr
555 /* add this to the storage class specifier */
556 SPEC_ABSA($1) = 1; /* set the absolute addr flag */
557 /* now get the abs addr from value */
558 SPEC_ADDR($1) = (int) floatFromVal(constExprValue($3,TRUE)) ;
565 $$->class = SPECIFIER ;
566 SPEC_NOUN($$) = V_CHAR ;
570 $$->class = SPECIFIER ;
571 $$->select.s._short = 1 ;
575 $$->class = SPECIFIER ;
576 SPEC_NOUN($$) = V_INT ;
580 $$->class = SPECIFIER ;
585 $$->class = SPECIFIER ;
586 $$->select.s._signed = 1;
590 $$->class = SPECIFIER ;
595 $$->class = SPECIFIER ;
596 SPEC_NOUN($$) = V_VOID ;
600 $$->class = SPECIFIER ;
605 $$->class = SPECIFIER ;
606 SPEC_VOLATILE($$) = 1 ;
610 SPEC_NOUN($$) = V_FLOAT;
611 $$->class = SPECIFIER ;
615 $$->class = SPECIFIER ;
616 SPEC_SCLS($$) = S_XDATA ;
620 $$->class = SPECIFIER ;
621 SPEC_SCLS($$) = S_CODE ;
625 $$->class = SPECIFIER ;
626 SPEC_SCLS($$) = S_EEPROM ;
630 $$->class = SPECIFIER ;
631 SPEC_SCLS($$) = S_DATA ;
635 $$->class = SPECIFIER ;
636 SPEC_SCLS($$) = S_IDATA ;
640 $$->class = SPECIFIER ;
641 SPEC_SCLS($$) = S_PDATA ;
645 $$->class = SPECIFIER ;
646 SPEC_NOUN($$) = V_BIT ;
647 SPEC_SCLS($$) = S_BIT ;
652 | struct_or_union_specifier
661 sym = findSym(TypedefTab,NULL,$1) ;
662 $$ = p = copyLinkChain(sym->type);
663 SPEC_TYPEDEF(getSpec(p)) = 0;
671 $$->class = SPECIFIER ;
672 SPEC_NOUN($$) = V_SBIT;
673 SPEC_SCLS($$) = S_SBIT;
677 $$->class = SPECIFIER ;
678 SPEC_NOUN($$) = V_CHAR;
679 SPEC_SCLS($$) = S_SFR ;
684 struct_or_union_specifier
685 : struct_or_union opt_stag '{' struct_declaration_list '}'
689 /* Create a structdef */
691 sdef->fields = reverseSyms($4) ; /* link the fields */
692 sdef->size = compStructSize($1,sdef); /* update size of */
694 /* Create the specifier */
696 $$->class = SPECIFIER ;
697 SPEC_NOUN($$) = V_STRUCT;
698 SPEC_STRUCT($$)= sdef ;
700 | struct_or_union stag
703 $$->class = SPECIFIER ;
704 SPEC_NOUN($$) = V_STRUCT;
705 SPEC_STRUCT($$) = $2 ;
710 : STRUCT { $$ = STRUCT ; }
711 | UNION { $$ = UNION ; }
716 | { /* synthesize a name add to structtable */
717 $$ = newStruct(genSymName(NestLevel)) ;
718 $$->level = NestLevel ;
719 addSym (StructTab, $$, $$->tag,$$->level,currBlockno, 0);
723 : identifier { /* add name to structure table */
724 $$ = findSymWithBlock (StructTab,$1,currBlockno);
726 $$ = newStruct($1->name) ;
727 $$->level = NestLevel ;
728 addSym (StructTab, $$, $$->tag,$$->level,currBlockno,0);
733 struct_declaration_list
735 | struct_declaration_list struct_declaration
738 /* go to the end of the chain */
739 while (sym->next) sym = sym->next;
747 : type_specifier_list struct_declarator_list ';'
749 /* add this type to all the symbols */
751 for ( sym = $2 ; sym != NULL ; sym = sym->next ) {
753 /* make the symbol one level up */
756 pointerTypes(sym->type,copyLinkChain($1));
758 sym->type = copyLinkChain($1);
759 sym->etype = getSpec(sym->type);
762 addDecl (sym,0,cloneSpec($1));
763 /* make sure the type is complete and sane */
764 checkTypeSanity(sym->etype, sym->name);
770 struct_declarator_list
772 | struct_declarator_list ',' struct_declarator
781 | ':' constant_expr {
782 $$ = newSymbol (genSymName(NestLevel),NestLevel) ;
783 $$->bitVar = (int) floatFromVal(constExprValue($2,TRUE));
785 | declarator ':' constant_expr
787 $1->bitVar = (int) floatFromVal(constExprValue($3,TRUE));
792 : ENUM '{' enumerator_list '}' {
794 allocVariables(reverseSyms($3)) ;
795 $$ = copyLinkChain(cenum->type);
797 | ENUM identifier '{' enumerator_list '}' {
800 $2->type = copyLinkChain(cenum->type);
801 $2->etype = getSpec($2->type);
802 /* add this to the enumerator table */
803 if (!(csym=findSym(enumTab,$2,$2->name)) &&
804 (csym && csym->level == $2->level))
805 werror(E_DUPLICATE_TYPEDEF,csym->name);
807 addSym ( enumTab,$2,$2->name,$2->level,$2->block, 0);
809 allocVariables (reverseSyms($4));
810 $$ = copyLinkChain(cenum->type);
811 SPEC_SCLS(getSpec($$)) = 0 ;
816 /* check the enumerator table */
817 if ((csym = findSym(enumTab,$2,$2->name)))
818 $$ = copyLinkChain(csym->type);
821 $$->class = SPECIFIER ;
822 SPEC_NOUN($$) = V_INT ;
825 SPEC_SCLS(getSpec($$)) = 0 ;
831 | enumerator_list ',' {
833 | enumerator_list ',' enumerator {
840 : identifier opt_assign_expr {
841 /* make the symbol one level up */
843 $1->type = copyLinkChain($2->type);
844 $1->etype= getSpec($1->type);
845 SPEC_ENUM($1->etype) = 1;
852 : '=' constant_expr {
855 val = constExprValue($2,TRUE);
860 sprintf(lbuff,"%d",(int) floatFromVal(cenum)+1);
861 $$ = cenum = constVal(lbuff);
864 sprintf(lbuff,"%d",0);
865 $$ = cenum = constVal(lbuff);
871 : declarator2_function_attributes { $$ = $1; }
872 | pointer declarator2_function_attributes
874 addDecl ($2,0,reverseLink($1));
879 declarator2_function_attributes
880 : declarator2 { $$ = $1 ; }
881 | declarator2 function_attribute {
882 // copy the functionAttributes (not the args and hasVargs !!)
883 sym_link *funcType=$1->etype;
884 struct value *args=FUNC_ARGS(funcType);
885 unsigned hasVargs=FUNC_HASVARARGS(funcType);
887 memcpy (&funcType->funcAttrs, &$2->funcAttrs,
888 sizeof($2->funcAttrs));
890 FUNC_ARGS(funcType)=args;
891 FUNC_HASVARARGS(funcType)=hasVargs;
894 memset (&$2->funcAttrs, 0,
895 sizeof($2->funcAttrs));
903 | '(' declarator ')' { $$ = $2; }
904 | declarator2 '[' ']'
909 DCL_TYPE(p) = ARRAY ;
913 | declarator2 '[' constant_expr ']'
918 p = (tval = constExprValue($3,TRUE))->etype;
919 /* if it is not a constant then Error */
920 if ( SPEC_SCLS(p) != S_LITERAL)
921 werror(E_CONST_EXPECTED) ;
924 DCL_TYPE(p) = ARRAY ;
925 DCL_ELEM(p) = (int) floatFromVal(tval) ;
929 | declarator2 '(' ')' { addDecl ($1,FUNCTION,NULL) ; }
930 | declarator2 '(' { NestLevel++ ; currBlockno++; } parameter_type_list ')'
933 addDecl ($1,FUNCTION,NULL) ;
935 FUNC_HASVARARGS($1->type) = IS_VARG($4);
936 FUNC_ARGS($1->type) = reverseVal($4);
938 /* nest level was incremented to take care of the parms */
942 // if this was a pointer (to a function)
943 if (IS_PTR($1->type)) {
944 // move the args and hasVargs to the function
945 FUNC_ARGS($1->etype)=FUNC_ARGS($1->type);
946 FUNC_HASVARARGS($1->etype)=FUNC_HASVARARGS($1->type);
947 memset (&$1->type->funcAttrs, 0,
948 sizeof($1->type->funcAttrs));
949 // remove the symbol args (if any)
950 cleanUpLevel(SymbolTab,NestLevel+1);
955 | declarator2 '(' parameter_identifier_list ')'
957 werror(E_OLD_STYLE,$1->name) ;
959 /* assume it returns an int */
960 $1->type = $1->etype = newIntLink();
966 : unqualified_pointer { $$ = $1 ;}
967 | unqualified_pointer type_specifier_list
972 | unqualified_pointer pointer
976 DCL_TYPE($2)=GPOINTER;
978 | unqualified_pointer type_specifier_list pointer
981 if (IS_SPEC($2) && DCL_TYPE($3) == UPOINTER) {
982 DCL_PTR_CONST($1) = SPEC_CONST($2);
983 DCL_PTR_VOLATILE($1) = SPEC_VOLATILE($2);
984 switch (SPEC_SCLS($2)) {
986 DCL_TYPE($3) = FPOINTER;
989 DCL_TYPE($3) = IPOINTER ;
992 DCL_TYPE($3) = PPOINTER ;
995 DCL_TYPE($3) = POINTER ;
998 DCL_PTR_CONST($3) = 1;
999 DCL_TYPE($3) = CPOINTER ;
1002 DCL_TYPE($3) = EEPPOINTER;
1005 // this could be just "constant"
1006 // werror(W_PTR_TYPE_INVALID);
1010 werror (W_PTR_TYPE_INVALID);
1019 DCL_TYPE($$)=UPOINTER;
1025 //| type_specifier_list type_specifier { $$ = mergeSpec ($1,$2, "type_specifier_list"); }
1026 | type_specifier_list type_specifier {
1027 /* if the decl $2 is not a specifier */
1028 /* find the spec and replace it */
1029 if ( !IS_SPEC($2)) {
1030 sym_link *lnk = $2 ;
1031 while (lnk && !IS_SPEC(lnk->next))
1033 lnk->next = mergeSpec($1,lnk->next, "type_specifier_list");
1037 $$ = mergeSpec($1,$2, "type_specifier_list");
1041 parameter_identifier_list
1043 | identifier_list ',' ELIPSIS
1048 | identifier_list ',' identifier
1057 | parameter_list ',' VAR_ARGS { $1->vArgs = 1;}
1061 : parameter_declaration
1062 | parameter_list ',' parameter_declaration
1069 parameter_declaration
1070 : type_specifier_list declarator
1073 pointerTypes($2->type,$1);
1075 for (loop=$2;loop;loop->_isparm=1,loop=loop->next);
1082 $$->etype = getSpec($$->type);
1087 : type_specifier_list { $$ = $1 ;}
1088 | type_specifier_list abstract_declarator
1090 /* go to the end of the list */
1092 pointerTypes($2,$1);
1093 for ( p = $2 ; p->next ; p=p->next);
1100 : pointer { $$ = reverseLink($1); }
1101 | abstract_declarator2
1102 | pointer abstract_declarator2 { $1 = reverseLink($1); $1->next = $2 ; $$ = $1;}
1105 abstract_declarator2
1106 : '(' abstract_declarator ')' { $$ = $2 ; }
1109 DCL_TYPE($$) = ARRAY ;
1112 | '[' constant_expr ']' {
1115 DCL_TYPE($$) = ARRAY ;
1116 DCL_ELEM($$) = (int) floatFromVal(val = constExprValue($2,TRUE));
1118 | abstract_declarator2 '[' ']' {
1120 DCL_TYPE($$) = ARRAY ;
1124 | abstract_declarator2 '[' constant_expr ']'
1128 DCL_TYPE($$) = ARRAY ;
1129 DCL_ELEM($$) = (int) floatFromVal(val = constExprValue($3,TRUE));
1132 | '(' ')' { $$ = NULL;}
1133 | '(' parameter_type_list ')' { $$ = NULL;}
1134 | abstract_declarator2 '(' ')' {
1135 // $1 must be a pointer to a function
1136 sym_link *p=newLink();
1137 DCL_TYPE(p) = FUNCTION;
1140 | abstract_declarator2 '(' parameter_type_list ')' {
1141 if (!IS_VOID($3->type)) {
1142 // this is nonsense, so let's just burp something
1143 werror(E_TOO_FEW_PARMS);
1145 // $1 must be a pointer to a function
1146 sym_link *p=newLink();
1147 DCL_TYPE(p) = FUNCTION;
1153 : assignment_expr { $$ = newiList(INIT_NODE,$1); }
1154 | '{' initializer_list '}' { $$ = newiList(INIT_DEEP,revinit($2)); }
1155 | '{' initializer_list ',' '}' { $$ = newiList(INIT_DEEP,revinit($2)); }
1160 | initializer_list ',' initializer { $3->next = $1; $$ = $3; }
1165 | compound_statement
1166 | expression_statement
1167 | selection_statement
1168 | iteration_statement
1171 ast *ex = newNode(INLINEASM,NULL,NULL);
1172 ex->values.inlineasm = malloc(strlen($1)+1);
1173 strcpy(ex->values.inlineasm,$1);
1179 // : identifier ':' statement { $$ = createLabel($1,$3); }
1180 : identifier ':' { $$ = createLabel($1,NULL); }
1181 | CASE constant_expr ':' statement { $$ = createCase(STACK_PEEK(swStk),$2,$4); }
1182 | DEFAULT ':' statement { $$ = createDefault(STACK_PEEK(swStk),$3); }
1185 start_block : '{' { STACK_PUSH(blockNum,currBlockno); currBlockno = ++blockNo ; }
1188 end_block : '}' { currBlockno = STACK_POP(blockNum); }
1192 : start_block end_block { $$ = createBlock(NULL,NULL); }
1193 | start_block statement_list end_block { $$ = createBlock(NULL,$2) ; }
1195 declaration_list { addSymChain($2); }
1196 end_block { $$ = createBlock($2,NULL) ; }
1198 declaration_list { addSymChain ($2); }
1200 end_block {$$ = createBlock($2,$4) ; }
1201 | error ';' { $$ = NULL ; }
1207 /* if this is typedef declare it immediately */
1208 if ( $1 && IS_TYPEDEF($1->etype)) {
1209 allocVariables ($1);
1216 | declaration_list declaration
1220 /* if this is a typedef */
1221 if ($2 && IS_TYPEDEF($2->etype)) {
1222 allocVariables ($2);
1226 /* get to the end of the previous decl */
1241 | statement_list statement { $$ = newNode(NULLOP,$1,$2) ;}
1244 expression_statement
1250 : ELSE statement { $$ = $2 ; }
1256 : IF '(' expr ')' statement else_statement { noLineno++ ; $$ = createIf ($3, $5, $6 ); noLineno--;}
1257 | SWITCH '(' expr ')' {
1259 static int swLabel = 0 ;
1261 /* create a node for expression */
1262 ex = newNode(SWITCH,$3,NULL);
1263 STACK_PUSH(swStk,ex); /* save it in the stack */
1264 ex->values.switchVals.swNum = swLabel ;
1266 /* now create the label */
1267 sprintf(lbuff,"_swBrk_%d",swLabel++);
1268 $<sym>$ = newSymbol(lbuff,NestLevel);
1269 /* put label in the break stack */
1270 STACK_PUSH(breakStack,$<sym>$);
1273 /* get back the switch form the stack */
1274 $$ = STACK_POP(swStk) ;
1275 $$->right = newNode (NULLOP,$6,createLabel($<sym>5,NULL));
1276 STACK_POP(breakStack);
1280 while : WHILE { /* create and push the continue , break & body labels */
1281 static int Lblnum = 0 ;
1283 sprintf (lbuff,"_whilecontinue_%d",Lblnum);
1284 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1286 sprintf (lbuff,"_whilebreak_%d",Lblnum);
1287 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1289 sprintf (lbuff,"_whilebody_%d",Lblnum++);
1290 $$ = newSymbol(lbuff,NestLevel);
1293 do : DO { /* create and push the continue , break & body Labels */
1294 static int Lblnum = 0 ;
1297 sprintf(lbuff,"_docontinue_%d",Lblnum);
1298 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1300 sprintf (lbuff,"_dobreak_%d",Lblnum);
1301 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1303 sprintf (lbuff,"_dobody_%d",Lblnum++);
1304 $$ = newSymbol (lbuff,NestLevel);
1306 for : FOR { /* create & push continue, break & body labels */
1307 static int Lblnum = 0 ;
1310 sprintf (lbuff,"_forcontinue_%d",Lblnum);
1311 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1313 sprintf (lbuff,"_forbreak_%d",Lblnum);
1314 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1316 sprintf (lbuff,"_forbody_%d",Lblnum);
1317 $$ = newSymbol(lbuff,NestLevel);
1319 sprintf (lbuff,"_forcond_%d",Lblnum++);
1320 STACK_PUSH(forStack,newSymbol(lbuff,NestLevel));
1324 : while '(' expr ')' statement
1327 $$ = createWhile ( $1, STACK_POP(continueStack),
1328 STACK_POP(breakStack), $3, $5 );
1329 $$->lineno = $1->lineDef ;
1332 | do statement WHILE '(' expr ')' ';'
1335 $$ = createDo ( $1 , STACK_POP(continueStack),
1336 STACK_POP(breakStack), $5, $2);
1337 $$->lineno = $1->lineDef ;
1340 | for '(' expr_opt ';' expr_opt ';' expr_opt ')' statement
1344 /* if break or continue statement present
1345 then create a general case loop */
1346 if (STACK_PEEK(continueStack)->isref ||
1347 STACK_PEEK(breakStack)->isref) {
1348 $$ = createFor ($1, STACK_POP(continueStack),
1349 STACK_POP(breakStack) ,
1350 STACK_POP(forStack) ,
1353 $$ = newNode(FOR,$9,NULL);
1354 AST_FOR($$,trueLabel) = $1;
1355 AST_FOR($$,continueLabel) = STACK_POP(continueStack);
1356 AST_FOR($$,falseLabel) = STACK_POP(breakStack);
1357 AST_FOR($$,condLabel) = STACK_POP(forStack) ;
1358 AST_FOR($$,initExpr) = $3;
1359 AST_FOR($$,condExpr) = $5;
1360 AST_FOR($$,loopExpr) = $7;
1373 : GOTO identifier ';' {
1375 $$ = newAst_VALUE(symbolVal($2));
1376 $$ = newNode(GOTO,$$,NULL);
1379 /* make sure continue is in context */
1380 if (STACK_PEEK(continueStack) == NULL) {
1381 werror(E_BREAK_CONTEXT);
1385 $$ = newAst_VALUE(symbolVal(STACK_PEEK(continueStack)));
1386 $$ = newNode(GOTO,$$,NULL);
1387 /* mark the continue label as referenced */
1388 STACK_PEEK(continueStack)->isref = 1;
1392 if (STACK_PEEK(breakStack) == NULL) {
1393 werror(E_BREAK_CONTEXT);
1396 $$ = newAst_VALUE(symbolVal(STACK_PEEK(breakStack)));
1397 $$ = newNode(GOTO,$$,NULL);
1398 STACK_PEEK(breakStack)->isref = 1;
1401 | RETURN ';' { $$ = newNode(RETURN,NULL,NULL) ; }
1402 | RETURN expr ';' { $$ = newNode(RETURN,NULL,$2) ; }
1406 : IDENTIFIER { $$ = newSymbol ($1,NestLevel) ; }