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*/
62 symbol *sym ; /* symbol table pointer */
63 structdef *sdef; /* structure definition */
64 char yychar[SDCC_NAME_MAX+1];
65 sym_link *lnk ; /* declarator or specifier */
66 int yyint; /* integer value returned */
67 value *val ; /* for integer constant */
68 initList *ilist; /* initial list */
69 char *yyinline; /* inlined assembler code */
70 ast *asts; /* expression tree */
73 %token <yychar> IDENTIFIER TYPE_NAME
74 %token <val> CONSTANT STRING_LITERAL
76 %token PTR_OP INC_OP DEC_OP LEFT_OP RIGHT_OP LE_OP GE_OP EQ_OP NE_OP
78 %token <yyint> MUL_ASSIGN DIV_ASSIGN MOD_ASSIGN ADD_ASSIGN
79 %token <yyint> SUB_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN
80 %token <yyint> XOR_ASSIGN OR_ASSIGN
81 %token TYPEDEF EXTERN STATIC AUTO REGISTER CODE EEPROM INTERRUPT SFR AT SBIT
82 %token REENTRANT USING XDATA DATA IDATA PDATA VAR_ARGS CRITICAL NONBANKED BANKED
83 %token CHAR SHORT INT LONG SIGNED UNSIGNED FLOAT DOUBLE CONST VOLATILE VOID BIT
84 %token STRUCT UNION ENUM ELIPSIS RANGE FAR _XDATA _CODE _GENERIC _NEAR _PDATA _IDATA _EEPROM
85 %token CASE DEFAULT IF ELSE SWITCH WHILE DO FOR GOTO CONTINUE BREAK RETURN
87 %token <yyinline> INLINEASM
88 %token IFX ADDRESS_OF GET_VALUE_AT_ADDRESS SPIL UNSPIL GETHBIT
89 %token BITWISEAND UNARYMINUS IPUSH IPOP PCALL ENDFUNCTION JUMPTABLE
91 %token CAST CALL PARAM NULLOP BLOCK LABEL RECEIVE SEND
93 %type <yyint> Interrupt_storage
94 %type <sym> identifier declarator declarator2 enumerator_list enumerator
95 %type <sym> struct_declarator
96 %type <sym> struct_declarator_list struct_declaration struct_declaration_list
97 %type <sym> declaration init_declarator_list init_declarator
98 %type <sym> declaration_list identifier_list parameter_identifier_list
99 %type <sym> declarator2_using_reentrant while do for
100 %type <lnk> pointer type_specifier_list type_specifier type_name
101 %type <lnk> storage_class_specifier struct_or_union_specifier
102 %type <lnk> declaration_specifiers sfr_reg_bit type_specifier2
103 %type <lnk> using_reentrant using_reentrant_interrupt enum_specifier
104 %type <lnk> abstract_declarator abstract_declarator2 far_near_pointer far_near
105 %type <val> parameter_type_list parameter_list parameter_declaration opt_assign_expr
106 %type <sdef> stag opt_stag
107 %type <asts> primary_expr
108 %type <asts> postfix_expr unary_expr cast_expr multiplicative_expr
109 %type <asts> additive_expr shift_expr relational_expr equality_expr
110 %type <asts> and_expr exclusive_or_expr inclusive_or_expr logical_or_expr
111 %type <asts> logical_and_expr conditional_expr assignment_expr constant_expr
112 %type <asts> expr argument_expr_list function_definition expr_opt
113 %type <asts> statement_list statement labeled_statement compound_statement
114 %type <asts> expression_statement selection_statement iteration_statement
115 %type <asts> jump_statement function_body else_statement string_literal
116 %type <ilist> initializer initializer_list
117 %type <yyint> unary_operator assignment_operator struct_or_union
124 : external_definition
125 | file external_definition
129 : function_definition { blockNo=0;}
132 && IS_FUNC($1->type))
134 /* The only legal storage classes for
135 * a function prototype (declaration)
136 * are extern and static. extern is the
137 * default. Thus, if this function isn't
138 * explicitly marked static, mark it
142 && IS_SPEC($1->etype)
143 && !SPEC_STAT($1->etype))
145 SPEC_EXTR($1->etype) = 1;
149 allocVariables ($1) ;
150 cleanUpLevel (SymbolTab,1);
155 : declarator function_body { /* function type not specified */
156 /* assume it to be 'int' */
157 addDecl($1,0,newIntLink());
158 $$ = createFunction($1,$2);
160 | declaration_specifiers declarator function_body
162 pointerTypes($2->type,copyLinkChain($1));
164 $$ = createFunction($2,$3);
169 : using_reentrant_interrupt
170 | using_reentrant_interrupt using_reentrant { $$ = mergeSpec($1,$2); }
173 using_reentrant_interrupt
176 $$->class = SPECIFIER ;
178 SPEC_BANK($$) = (int) floatFromVal($2);
180 | REENTRANT { $$ = newLink ();
181 $$->class = SPECIFIER ;
184 | CRITICAL { $$ = newLink ();
185 $$->class = SPECIFIER ;
188 | NAKED { $$ = newLink ();
189 $$->class = SPECIFIER ;
192 | NONBANKED {$$ = newLink ();
193 $$->class = SPECIFIER ;
194 SPEC_NONBANKED($$) = 1;
195 if (SPEC_BANKED($$)) {
196 werror(W_BANKED_WITH_NONBANKED);
199 | BANKED {$$ = newLink ();
200 $$->class = SPECIFIER ;
202 if (SPEC_NONBANKED($$)) {
203 werror(W_BANKED_WITH_NONBANKED);
206 werror(W_BANKED_WITH_STATIC);
212 $$->class = SPECIFIER ;
220 | declaration_list compound_statement
222 werror(E_OLD_STYLE,($1 ? $1->name: "")) ;
228 : identifier { $$ = newAst_VALUE(symbolVal($1)); }
229 | CONSTANT { $$ = newAst_VALUE($1); }
231 | '(' expr ')' { $$ = $2 ; }
235 : STRING_LITERAL { $$ = newAst_VALUE($1); }
240 | postfix_expr '[' expr ']' { $$ = newNode ('[', $1, $3) ; }
241 | postfix_expr '(' ')' { $$ = newNode (CALL,$1,NULL);
242 $$->left->funcName = 1;}
243 | postfix_expr '(' argument_expr_list ')'
245 $$ = newNode (CALL,$1,$3) ; $$->left->funcName = 1;
247 | postfix_expr '.' identifier
249 $3 = newSymbol($3->name,NestLevel);
251 $$ = newNode(PTR_OP,newNode('&',$1,NULL),newAst_VALUE(symbolVal($3)));
252 /* $$ = newNode('.',$1,newAst(EX_VALUE,symbolVal($3))) ; */
254 | postfix_expr PTR_OP identifier
256 $3 = newSymbol($3->name,NestLevel);
258 $$ = newNode(PTR_OP,$1,newAst_VALUE(symbolVal($3)));
260 | postfix_expr INC_OP
261 { $$ = newNode(INC_OP,$1,NULL);}
262 | postfix_expr DEC_OP
263 { $$ = newNode(DEC_OP,$1,NULL); }
268 | assignment_expr ',' argument_expr_list { $$ = newNode(PARAM,$1,$3); }
273 | INC_OP unary_expr { $$ = newNode(INC_OP,NULL,$2); }
274 | DEC_OP unary_expr { $$ = newNode(DEC_OP,NULL,$2); }
275 | unary_operator cast_expr { $$ = newNode($1,$2,NULL) ; }
276 | SIZEOF unary_expr { $$ = newNode(SIZEOF,NULL,$2); }
277 | SIZEOF '(' type_name ')' { $$ = newAst_VALUE(sizeofOp($3)); }
291 | '(' type_name ')' cast_expr { $$ = newNode(CAST,newAst_LINK($2),$4); }
296 | multiplicative_expr '*' cast_expr { $$ = newNode('*',$1,$3);}
297 | multiplicative_expr '/' cast_expr { $$ = newNode('/',$1,$3);}
298 | multiplicative_expr '%' cast_expr { $$ = newNode('%',$1,$3);}
302 : multiplicative_expr
303 | additive_expr '+' multiplicative_expr { $$=newNode('+',$1,$3);}
304 | additive_expr '-' multiplicative_expr { $$=newNode('-',$1,$3);}
309 | shift_expr LEFT_OP additive_expr { $$ = newNode(LEFT_OP,$1,$3); }
310 | shift_expr RIGHT_OP additive_expr { $$ = newNode(RIGHT_OP,$1,$3); }
315 | relational_expr '<' shift_expr {
317 newNode('!',newNode(GE_OP,$1,$3),NULL) :
318 newNode('<', $1,$3));
320 | relational_expr '>' shift_expr {
322 newNode('!',newNode(LE_OP,$1,$3),NULL) :
325 | relational_expr LE_OP shift_expr {
327 newNode('!', newNode('>', $1 , $3 ), NULL) :
328 newNode(LE_OP,$1,$3));
330 | relational_expr GE_OP shift_expr {
332 newNode('!', newNode('<', $1 , $3 ), NULL) :
333 newNode(GE_OP,$1,$3));
339 | equality_expr EQ_OP relational_expr {
341 newNode('!',newNode(NE_OP,$1,$3),NULL) :
342 newNode(EQ_OP,$1,$3));
344 | equality_expr NE_OP relational_expr {
346 newNode('!', newNode(EQ_OP,$1,$3), NULL) :
347 newNode(NE_OP,$1,$3));
353 | and_expr '&' equality_expr { $$ = newNode('&',$1,$3);}
358 | exclusive_or_expr '^' and_expr { $$ = newNode('^',$1,$3);}
363 | inclusive_or_expr '|' exclusive_or_expr { $$ = newNode('|',$1,$3);}
368 | logical_and_expr AND_OP inclusive_or_expr
369 { $$ = newNode(AND_OP,$1,$3);}
374 | logical_or_expr OR_OP logical_and_expr
375 { $$ = newNode(OR_OP,$1,$3); }
380 | logical_or_expr '?' logical_or_expr ':' conditional_expr
382 $$ = newNode(':',$3,$5) ;
383 $$ = newNode('?',$1,$$) ;
389 | unary_expr assignment_operator assignment_expr
394 $$ = newNode($2,$1,$3);
397 $$ = newNode('=',$1,newNode('*',copyAst($1),$3));
400 $$ = 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(LEFT_OP,copyAst($1),$3));
415 $$ = newNode('=',$1,newNode(RIGHT_OP,copyAst($1),$3));
418 $$ = newNode('=',$1,newNode('&',copyAst($1),$3));
421 $$ = newNode('=',$1,newNode('^',copyAst($1),$3));
424 $$ = newNode('=',$1,newNode('|',copyAst($1),$3));
449 | expr ',' assignment_expr { $$ = newNode(',',$1,$3);}
457 : declaration_specifiers ';' { $$ = NULL ; }
458 | declaration_specifiers init_declarator_list ';'
460 /* add the specifier list to the id */
463 for (sym1 = sym = reverseSyms($2);sym != NULL;sym = sym->next) {
464 sym_link *lnk = copyLinkChain($1);
465 /* do the pointer stuff */
466 pointerTypes(sym->type,lnk);
467 addDecl (sym,0,lnk) ;
474 declaration_specifiers
475 : storage_class_specifier { $$ = $1; }
476 | storage_class_specifier declaration_specifiers {
477 /* if the decl $2 is not a specifier */
478 /* find the spec and replace it */
481 while (lnk && !IS_SPEC(lnk->next))
483 lnk->next = mergeSpec($1,lnk->next);
487 $$ = mergeSpec($1,$2);
489 | type_specifier { $$ = $1; }
490 | type_specifier declaration_specifiers {
491 /* if the decl $2 is not a specifier */
492 /* find the spec and replace it */
495 while (lnk && !IS_SPEC(lnk->next))
497 lnk->next = mergeSpec($1,lnk->next);
501 $$ = mergeSpec($1,$2);
507 | init_declarator_list ',' init_declarator { $3->next = $1 ; $$ = $3;}
511 : declarator { $1->ival = NULL ; }
512 | declarator '=' initializer { $1->ival = $3 ; }
516 storage_class_specifier
519 $$->class = SPECIFIER ;
520 SPEC_TYPEDEF($$) = 1 ;
524 $$->class = SPECIFIER ;
529 $$->class = SPECIFIER ;
534 $$->class = SPECIFIER ;
535 SPEC_SCLS($$) = S_AUTO ;
539 $$->class = SPECIFIER ;
540 SPEC_SCLS($$) = S_REGISTER ;
545 : INTERRUPT CONSTANT { $$ = (int) floatFromVal($2) ; }
550 | type_specifier2 AT constant_expr
552 /* add this to the storage class specifier */
553 SPEC_ABSA($1) = 1; /* set the absolute addr flag */
554 /* now get the abs addr from value */
555 SPEC_ADDR($1) = (int) floatFromVal(constExprValue($3,TRUE)) ;
562 $$->class = SPECIFIER ;
563 SPEC_NOUN($$) = V_CHAR ;
567 $$->class = SPECIFIER ;
568 SPEC_NOUN($$) = V_INT ;
573 $$->class = SPECIFIER ;
574 SPEC_NOUN($$) = V_INT ;
578 $$->class = SPECIFIER ;
579 SPEC_NOUN($$) = V_INT ;
584 $$->class = SPECIFIER ;
585 SPEC_SIGNED($$) = 1 ;
589 $$->class = SPECIFIER ;
594 $$->class = SPECIFIER ;
595 SPEC_NOUN($$) = V_VOID ;
599 $$->class = SPECIFIER ;
600 //SPEC_SCLS($$) = S_CONSTANT ;
605 $$->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
662 sym = findSym(TypedefTab,NULL,$1) ;
663 $$ = p = copyLinkChain(sym->type);
664 SPEC_TYPEDEF(getSpec(p)) = 0;
672 $$->class = SPECIFIER ;
673 SPEC_NOUN($$) = V_SBIT;
674 SPEC_SCLS($$) = S_SBIT;
678 $$->class = SPECIFIER ;
679 SPEC_NOUN($$) = V_CHAR;
680 SPEC_SCLS($$) = S_SFR ;
685 struct_or_union_specifier
686 : struct_or_union opt_stag '{' struct_declaration_list '}'
690 /* Create a structdef */
692 sdef->fields = reverseSyms($4) ; /* link the fields */
693 sdef->size = compStructSize($1,sdef); /* update size of */
695 /* Create the specifier */
697 $$->class = SPECIFIER ;
698 SPEC_NOUN($$) = V_STRUCT;
699 SPEC_STRUCT($$)= sdef ;
701 | struct_or_union stag
704 $$->class = SPECIFIER ;
705 SPEC_NOUN($$) = V_STRUCT;
706 SPEC_STRUCT($$) = $2 ;
711 : STRUCT { $$ = STRUCT ; }
712 | UNION { $$ = UNION ; }
717 | { /* synthesize a name add to structtable */
718 $$ = newStruct(genSymName(NestLevel)) ;
719 $$->level = NestLevel ;
720 addSym (StructTab, $$, $$->tag,$$->level,currBlockno) ;
725 : identifier { /* add name to structure table */
726 $$ = findSymWithBlock (StructTab,$1,currBlockno);
728 $$ = newStruct($1->name) ;
729 $$->level = NestLevel ;
730 addSym (StructTab, $$, $$->tag,$$->level,currBlockno) ;
735 struct_declaration_list
737 | struct_declaration_list struct_declaration
740 /* go to the end of the chain */
741 while (sym->next) sym = sym->next;
749 : type_specifier_list struct_declarator_list ';'
751 /* add this type to all the symbols */
753 for ( sym = $2 ; sym != NULL ; sym = sym->next ) {
755 pointerTypes(sym->type,copyLinkChain($1));
757 sym->type = copyLinkChain($1);
758 sym->etype = getSpec(sym->type);
761 addDecl (sym,0,cloneSpec($1));
768 struct_declarator_list
770 | struct_declarator_list ',' struct_declarator
779 | ':' constant_expr {
780 $$ = newSymbol (genSymName(NestLevel),NestLevel) ;
781 $$->bitVar = (int) floatFromVal(constExprValue($2,TRUE));
783 | declarator ':' constant_expr
785 $1->bitVar = (int) floatFromVal(constExprValue($3,TRUE));
790 : ENUM '{' enumerator_list '}' {
792 allocVariables(reverseSyms($3)) ;
793 $$ = copyLinkChain(cenum->type);
795 | ENUM identifier '{' enumerator_list '}' {
798 $2->type = copyLinkChain(cenum->type);
799 $2->etype = getSpec($2->type);
800 /* add this to the enumerator table */
801 if (!(csym=findSym(enumTab,$2,$2->name)) &&
802 (csym && csym->level == $2->level))
803 werror(E_DUPLICATE_TYPEDEF,csym->name);
805 addSym ( enumTab,$2,$2->name,$2->level,$2->block);
807 allocVariables (reverseSyms($4));
808 $$ = copyLinkChain(cenum->type);
809 SPEC_SCLS(getSpec($$)) = 0 ;
814 /* check the enumerator table */
815 if ((csym = findSym(enumTab,$2,$2->name)))
816 $$ = copyLinkChain(csym->type);
819 $$->class = SPECIFIER ;
820 SPEC_NOUN($$) = V_INT ;
823 SPEC_SCLS(getSpec($$)) = 0 ;
829 | enumerator_list ',' enumerator {
836 : identifier opt_assign_expr {
837 /* make the symbol one level up */
839 $1->type = copyLinkChain($2->type);
840 $1->etype= getSpec($1->type);
841 SPEC_ENUM($1->etype) = 1;
848 : '=' constant_expr {
851 val = constExprValue($2,TRUE);
856 sprintf(lbuff,"%d",(int) floatFromVal(cenum)+1);
857 $$ = cenum = constVal(lbuff);
860 sprintf(lbuff,"%d",0);
861 $$ = cenum = constVal(lbuff);
867 : declarator2_using_reentrant { $$ = $1; }
868 | pointer declarator2_using_reentrant
870 addDecl ($2,0,reverseLink($1));
875 declarator2_using_reentrant
876 : declarator2 { $$ = $1 ; }
877 | declarator2 using_reentrant { addDecl ($1,0,$2); }
882 | '(' declarator ')' { $$ = $2; }
883 | declarator2 '[' ']'
888 DCL_TYPE(p) = ARRAY ;
892 | declarator2 '[' constant_expr ']'
897 p = (tval = constExprValue($3,TRUE))->etype;
898 /* if it is not a constant then Error */
899 if ( SPEC_SCLS(p) != S_LITERAL)
900 werror(E_CONST_EXPECTED) ;
903 DCL_TYPE(p) = ARRAY ;
904 DCL_ELEM(p) = (int) floatFromVal(tval) ;
908 | declarator2 '(' ')' { addDecl ($1,FUNCTION,NULL) ; }
909 | declarator2 '(' { NestLevel++ ; currBlockno++; } parameter_type_list ')'
912 addDecl ($1,FUNCTION,NULL) ;
914 $1->hasVargs = IS_VARG($4);
915 $1->args = reverseVal($4) ;
917 /* nest level was incremented to take care of the parms */
922 | declarator2 '(' parameter_identifier_list ')'
924 werror(E_OLD_STYLE,$1->name) ;
926 /* assume it returns an int */
927 $1->type = $1->etype = newIntLink();
933 : far_near_pointer { $$ = $1 ;}
934 | far_near_pointer type_specifier_list
939 | far_near_pointer pointer
944 | far_near_pointer type_specifier_list pointer
947 if (IS_SPEC($2) && DCL_TYPE($3) == UPOINTER) {
948 DCL_PTR_CONST($1) = SPEC_CONST($2);
949 DCL_PTR_VOLATILE($1) = SPEC_VOLATILE($2);
950 switch (SPEC_SCLS($2)) {
952 DCL_TYPE($3) = FPOINTER;
955 DCL_TYPE($3) = IPOINTER ;
958 DCL_TYPE($3) = PPOINTER ;
961 DCL_TYPE($3) = POINTER ;
964 DCL_PTR_CONST($3) = 1;
965 DCL_TYPE($3) = CPOINTER ;
967 DCL_TYPE($3) = EEPPOINTER;
970 werror(W_PTR_TYPE_INVALID);
974 werror (W_PTR_TYPE_INVALID);
983 DCL_TYPE($$) = POINTER ;
991 : _XDATA { $$ = newLink() ; DCL_TYPE($$) = FPOINTER ; }
992 | _CODE { $$ = newLink() ; DCL_TYPE($$) = CPOINTER ; DCL_PTR_CONST($$) = 1;}
993 | _PDATA { $$ = newLink() ; DCL_TYPE($$) = PPOINTER ; }
994 | _IDATA { $$ = newLink() ; DCL_TYPE($$) = IPOINTER ; }
995 | _NEAR { $$ = NULL ; }
996 | _GENERIC { $$ = newLink() ; DCL_TYPE($$) = GPOINTER ; }
997 | _EEPROM { $$ = newLink() ; DCL_TYPE($$) = EEPPOINTER ;}
998 | { $$ = newLink() ; DCL_TYPE($$) = UPOINTER ; }
1003 | type_specifier_list type_specifier { $$ = mergeSpec ($1,$2); }
1006 parameter_identifier_list
1008 | identifier_list ',' ELIPSIS
1013 | identifier_list ',' identifier
1022 | parameter_list ',' VAR_ARGS { $1->vArgs = 1;}
1026 : parameter_declaration
1027 | parameter_list ',' parameter_declaration
1034 parameter_declaration
1035 : type_specifier_list declarator
1038 pointerTypes($2->type,$1);
1040 for (loop=$2;loop;loop->_isparm=1,loop=loop->next);
1047 $$->etype = getSpec($$->type);
1052 : type_specifier_list { $$ = $1 ;}
1053 | type_specifier_list abstract_declarator
1055 /* go to the end of the list */
1057 pointerTypes($2,$1);
1058 for ( p = $2 ; p->next ; p=p->next);
1065 : pointer { $$ = reverseLink($1); }
1066 | abstract_declarator2
1067 | pointer abstract_declarator2 { $1 = reverseLink($1); $1->next = $2 ; $$ = $1;}
1070 abstract_declarator2
1071 : '(' abstract_declarator ')' { $$ = $2 ; }
1074 DCL_TYPE($$) = ARRAY ;
1077 | '[' constant_expr ']' {
1080 DCL_TYPE($$) = ARRAY ;
1081 DCL_ELEM($$) = (int) floatFromVal(val = constExprValue($2,TRUE));
1083 | abstract_declarator2 '[' ']' {
1085 DCL_TYPE($$) = ARRAY ;
1089 | abstract_declarator2 '[' constant_expr ']'
1093 DCL_TYPE($$) = ARRAY ;
1094 DCL_ELEM($$) = (int) floatFromVal(val = constExprValue($3,TRUE));
1097 | '(' ')' { $$ = NULL;}
1098 | '(' parameter_type_list ')' { $$ = NULL;}
1099 | abstract_declarator2 '(' ')'
1100 | abstract_declarator2 '(' parameter_type_list ')'
1104 : assignment_expr { $$ = newiList(INIT_NODE,$1); }
1105 | '{' initializer_list '}' { $$ = newiList(INIT_DEEP,revinit($2)); }
1106 | '{' initializer_list ',' '}' { $$ = newiList(INIT_DEEP,revinit($2)); }
1111 | initializer_list ',' initializer { $3->next = $1; $$ = $3; }
1116 | compound_statement
1117 | expression_statement
1118 | selection_statement
1119 | iteration_statement
1122 ast *ex = newNode(INLINEASM,NULL,NULL);
1123 ex->values.inlineasm = Safe_calloc(1,strlen($1)+1);
1124 strcpy(ex->values.inlineasm,$1);
1130 : identifier ':' statement { $$ = createLabel($1,$3); }
1131 | CASE constant_expr ':' statement { $$ = createCase(STACK_PEEK(swStk),$2,$4); }
1132 | DEFAULT ':' statement { $$ = createDefault(STACK_PEEK(swStk),$3); }
1135 start_block : '{' { STACK_PUSH(blockNum,currBlockno); currBlockno = ++blockNo ; }
1138 end_block : '}' { currBlockno = STACK_POP(blockNum); }
1142 : start_block end_block { $$ = createBlock(NULL,NULL); }
1143 | start_block statement_list end_block { $$ = createBlock(NULL,$2) ; }
1145 declaration_list { addSymChain($2); }
1146 end_block { $$ = createBlock($2,NULL) ; }
1148 declaration_list { addSymChain ($2); }
1150 end_block {$$ = createBlock($2,$4) ; }
1151 | error ';' { $$ = NULL ; }
1157 /* if this is typedef declare it immediately */
1158 if ( $1 && IS_TYPEDEF($1->etype)) {
1159 allocVariables ($1);
1166 | declaration_list declaration
1170 /* if this is a typedef */
1171 if ($2 && IS_TYPEDEF($2->etype)) {
1172 allocVariables ($2);
1176 /* get to the end of the previous decl */
1191 | statement_list statement { $$ = newNode(NULLOP,$1,$2) ;}
1194 expression_statement
1200 : ELSE statement { $$ = $2 ; }
1206 : IF '(' expr ')' statement else_statement { noLineno++ ; $$ = createIf ($3, $5, $6 ); noLineno--;}
1207 | SWITCH '(' expr ')' {
1209 static int swLabel = 0 ;
1211 /* create a node for expression */
1212 ex = newNode(SWITCH,$3,NULL);
1213 STACK_PUSH(swStk,ex); /* save it in the stack */
1214 ex->values.switchVals.swNum = swLabel ;
1216 /* now create the label */
1217 sprintf(lbuff,"_swBrk_%d",swLabel++);
1218 $<sym>$ = newSymbol(lbuff,NestLevel);
1219 /* put label in the break stack */
1220 STACK_PUSH(breakStack,$<sym>$);
1223 /* get back the switch form the stack */
1224 $$ = STACK_POP(swStk) ;
1225 $$->right = newNode (NULLOP,$6,createLabel($<sym>5,NULL));
1226 STACK_POP(breakStack);
1230 while : WHILE { /* create and push the continue , break & body labels */
1231 static int Lblnum = 0 ;
1233 sprintf (lbuff,"_whilecontinue_%d",Lblnum);
1234 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1236 sprintf (lbuff,"_whilebreak_%d",Lblnum);
1237 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1239 sprintf (lbuff,"_whilebody_%d",Lblnum++);
1240 $$ = newSymbol(lbuff,NestLevel);
1243 do : DO { /* create and push the continue , break & body Labels */
1244 static int Lblnum = 0 ;
1247 sprintf(lbuff,"_docontinue_%d",Lblnum);
1248 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1250 sprintf (lbuff,"_dobreak_%d",Lblnum);
1251 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1253 sprintf (lbuff,"_dobody_%d",Lblnum++);
1254 $$ = newSymbol (lbuff,NestLevel);
1256 for : FOR { /* create & push continue, break & body labels */
1257 static int Lblnum = 0 ;
1260 sprintf (lbuff,"_forcontinue_%d",Lblnum);
1261 STACK_PUSH(continueStack,newSymbol(lbuff,NestLevel));
1263 sprintf (lbuff,"_forbreak_%d",Lblnum);
1264 STACK_PUSH(breakStack,newSymbol(lbuff,NestLevel));
1266 sprintf (lbuff,"_forbody_%d",Lblnum);
1267 $$ = newSymbol(lbuff,NestLevel);
1269 sprintf (lbuff,"_forcond_%d",Lblnum++);
1270 STACK_PUSH(forStack,newSymbol(lbuff,NestLevel));
1274 : while '(' expr ')' statement
1277 $$ = createWhile ( $1, STACK_POP(continueStack),
1278 STACK_POP(breakStack), $3, $5 );
1279 $$->lineno = $1->lineDef ;
1282 | do statement WHILE '(' expr ')' ';'
1285 $$ = createDo ( $1 , STACK_POP(continueStack),
1286 STACK_POP(breakStack), $5, $2);
1287 $$->lineno = $1->lineDef ;
1290 | for '(' expr_opt ';' expr_opt ';' expr_opt ')' statement
1294 /* if break or continue statement present
1295 then create a general case loop */
1296 if (STACK_PEEK(continueStack)->isref ||
1297 STACK_PEEK(breakStack)->isref) {
1298 $$ = createFor ($1, STACK_POP(continueStack),
1299 STACK_POP(breakStack) ,
1300 STACK_POP(forStack) ,
1303 $$ = newNode(FOR,$9,NULL);
1304 AST_FOR($$,trueLabel) = $1;
1305 AST_FOR($$,continueLabel) = STACK_POP(continueStack);
1306 AST_FOR($$,falseLabel) = STACK_POP(breakStack);
1307 AST_FOR($$,condLabel) = STACK_POP(forStack) ;
1308 AST_FOR($$,initExpr) = $3;
1309 AST_FOR($$,condExpr) = $5;
1310 AST_FOR($$,loopExpr) = $7;
1323 : GOTO identifier ';' {
1325 $$ = newAst_VALUE(symbolVal($2));
1326 $$ = newNode(GOTO,$$,NULL);
1329 /* make sure continue is in context */
1330 if (STACK_PEEK(continueStack) == NULL) {
1331 werror(E_BREAK_CONTEXT);
1335 $$ = newAst_VALUE(symbolVal(STACK_PEEK(continueStack)));
1336 $$ = newNode(GOTO,$$,NULL);
1337 /* mark the continue label as referenced */
1338 STACK_PEEK(continueStack)->isref = 1;
1342 if (STACK_PEEK(breakStack) == NULL) {
1343 werror(E_BREAK_CONTEXT);
1346 $$ = newAst_VALUE(symbolVal(STACK_PEEK(breakStack)));
1347 $$ = newNode(GOTO,$$,NULL);
1348 STACK_PEEK(breakStack)->isref = 1;
1351 | RETURN ';' { $$ = newNode(RETURN,NULL,NULL) ; }
1352 | RETURN expr ';' { $$ = newNode(RETURN,NULL,$2) ; }
1356 : IDENTIFIER { $$ = newSymbol ($1,NestLevel) ; }