scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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cc2.h (5102B)


      1 enum iflags {
      2 	BBENTRY =    1,        /* basic block entry */
      3 };
      4 
      5 enum tflags {
      6 	SIGNF   =     1 << 0,  /* Signed type */
      7 	INTF    =     1 << 1,  /* integer type */
      8 	FLOATF  =     1 << 2,  /* float type */
      9 	STRF    =     1 << 3,  /* string */
     10 	AGGRF   =     1 << 4,  /* aggregate */
     11 	FUNF    =     1 << 5,  /* function */
     12 	PARF    =     1 << 6,  /* parameter */
     13 	INITF   =     1 << 7,  /* initializer flag */
     14 	ELLIPS  =     1 << 8,  /* vararg function */
     15 };
     16 
     17 enum sclass {
     18 	SAUTO     = 'A',
     19 	SREG      = 'R',
     20 	SLABEL    = 'L',
     21 	SINDEX    = 'I',
     22 	STMP      = 'N',
     23 	SGLOB     = 'G',
     24 	SEXTRN    = 'X',
     25 	SPRIV     = 'Y',
     26 	SLOCAL    = 'T',
     27 	SMEMB     = 'M',
     28 	SCONST    = '#',
     29 	STRING    = '"',
     30 	SNONE     = 0 /* cc2 relies on SNONE being 0 in nextpc() */
     31 };
     32 
     33 enum types {
     34 	ELLIPSIS = 'E',
     35 	INT8     = 'C',
     36 	INT16    = 'I',
     37 	INT32    = 'W',
     38 	INT64    = 'Q',
     39 	UINT8    = 'K',
     40 	UINT16   = 'N',
     41 	UINT32   = 'Z',
     42 	UINT64   = 'O',
     43 	POINTER  = 'P',
     44 	FUNCTION = 'F',
     45 	VECTOR   = 'V',
     46 	UNION    = 'U',
     47 	STRUCT   = 'S',
     48 	BOOL     = 'B',
     49 	FLOAT    = 'J',
     50 	DOUBLE   = 'D',
     51 	LDOUBLE  = 'H',
     52 	VOID     = '0'
     53 };
     54 
     55 enum op {
     56 	/* kind of operand */
     57 	/* operands */
     58 	OMEM     = 'M',
     59 	OTMP     = 'N',
     60 	OAUTO    = 'A',
     61 	OREG     = 'R',
     62 	OCONST   = '#',
     63 	OSTRING  = '"',
     64 	OLOAD    = 'D',
     65 	OLABEL   = 'L',
     66 	OADD     = '+',
     67 	OSUB     = '-',
     68 	OMUL     = '*',
     69 	OMOD     = '%',
     70 	ODIV     = '/',
     71 	OSHL     = 'l',
     72 	OSHR     = 'r',
     73 	OLT      = '<',
     74 	OGT      = '>',
     75 	OLE      = '[',
     76 	OGE      = ']',
     77 	OEQ      = '=',
     78 	ONE      = '!',
     79 	OBAND    = '&',
     80 	OBOR     = '|',
     81 	OBXOR    = '^',
     82 	OCPL     = '~',
     83 	OASSIG   = ':',
     84 	OSNEG    = '_',
     85 	OCALL    = 'c',
     86 	OCALLE   = 'z',
     87 	OPAR     = 'p',
     88 	OFIELD   = '.',
     89 	OCOMMA   = ',',
     90 	OASK     = '?',
     91 	OCOLON   = ' ',
     92 	OADDR    = '\'',
     93 	OAND     = 'a',
     94 	OOR      = 'o',
     95 	ONEG     = 'n',
     96 	OPTR     = '@',
     97 	OCAST    = 'g',
     98 	OINC     = 'i',
     99 	ODEC     = 'd',
    100 	OBUILTIN = 'm',
    101 	/*statements */
    102 	ONOP     = 'q',
    103 	OJMP     = 'j',
    104 	OBRANCH  = 'y',
    105 	ORET     = 'h',
    106 	OBLOOP   = 'b',
    107 	OELOOP   = 'e',
    108 	OCASE    = 'v',
    109 	ODEFAULT = 'f',
    110 	OBSWITCH = 's',
    111 	OESWITCH = 't',
    112 	OBFUN    = 'x',
    113 	OEFUN    = 'k',
    114 };
    115 
    116 enum builtins {
    117 	BVA_START = 's',
    118 	BVA_END   = 'e',
    119 	BVA_ARG   = 'a',
    120 	BVA_COPY  = 'c',
    121 };
    122 
    123 enum nerrors {
    124 	EEOFFUN,       /* EOF while parsing function */
    125 	ENLABEL,       /* label without statement */
    126 	EIDOVER,       /* identifier overflow */
    127 	EOUTPAR,       /* out pf params */
    128 	ESYNTAX,       /* syntax error */
    129 	ESTACKA,       /* stack unaligned */
    130 	ESTACKO,       /* stack overflow */
    131 	ESTACKU,       /* stack underflow */
    132 	ELNLINE,       /* line too long */
    133 	ELNBLNE,       /* line without new line */
    134 	EFERROR,       /* error reading from file:%s */
    135 	EBADID,        /* incorrect symbol id */
    136 	EWTACKO,       /* switch stack overflow */
    137 	EWTACKU,       /* switch stack underflow */
    138 	ENOSWTC,       /* Out of switch statement */
    139 	EBBUILT,       /* Unknown builtin */
    140 	ENUMERR
    141 };
    142 
    143 typedef struct node Node;
    144 typedef struct type Type;
    145 typedef struct symbol Symbol;
    146 typedef struct addr Addr;
    147 typedef struct inst Inst;
    148 
    149 struct type {
    150 	unsigned long size;
    151 	unsigned long align;
    152 	short flags;
    153 };
    154 
    155 struct symbol {
    156 	Type type;
    157 	Type rtype;
    158 	unsigned short id;
    159 	unsigned short numid;
    160 	char *name;
    161 	char kind;
    162 	union {
    163 		unsigned long off;
    164 		Node *stmt;
    165 		Inst *inst;
    166 	} u;
    167 	Symbol *next;
    168 	Symbol *h_next;
    169 };
    170 
    171 struct node {
    172 	char op;
    173 	Type type;
    174 	char complex;
    175 	char address;
    176 	unsigned char flags;
    177 	union {
    178 		TUINT i;
    179 		TFLOAT f;
    180 		char reg;
    181 		char *s;
    182 		Symbol *sym;
    183 		char subop;
    184 	} u;
    185 	Symbol *label;
    186 	Node *left, *right;
    187 	Node *next, *prev;
    188 };
    189 
    190 struct addr {
    191         char kind;
    192         union {
    193                 char reg;
    194                 TUINT i;
    195                 Symbol *sym;
    196         } u;
    197 };
    198 
    199 struct inst {
    200 	unsigned char op;
    201 	unsigned char flags;
    202 	Symbol *label;
    203 	Inst *next, *prev;
    204 	Addr from1, from2, to;
    205 };
    206 
    207 /* main.c */
    208 extern void error(unsigned nerror, ...);
    209 
    210 /* parse.c */
    211 extern void parse(void);
    212 
    213 /* optm.c */
    214 extern Node *optm_dep(Node *np), *optm_ind(Node *np);
    215 
    216 /* cgen.c */
    217 extern Node *sethi(Node *np);
    218 extern Node *cgen(Node *np);
    219 
    220 /* peep.c */
    221 extern void peephole(void);
    222 
    223 /* code.c */
    224 extern void data(Node *np);
    225 extern void writeout(void), endinit(void), newfun(void);
    226 extern void code(int op, Node *to, Node *from1, Node *from2);
    227 extern void defvar(Symbol *), defpar(Symbol *), defglobal(Symbol *);
    228 extern void setlabel(Symbol *sym), getbblocks(void);
    229 extern Node *label2node(Node *np, Symbol *sym);
    230 extern Node *constnode(Node *np, TUINT n, Type *tp);
    231 extern Symbol *newlabel(void);
    232 
    233 /* node.c */
    234 #define SETCUR  1
    235 #define KEEPCUR 0
    236 extern void apply(Node *(*fun)(Node *));
    237 extern void cleannodes(void);
    238 extern void delnode(Node *np);
    239 extern void deltree(Node *np);
    240 extern void prtree(Node *np), prforest(char *msg);
    241 extern Node *node(int op);
    242 extern Node *addstmt(Node *np, int flags);
    243 extern Node *delstmt(void);
    244 extern Node *nextstmt(void);
    245 
    246 /* symbol.c */
    247 #define TMPSYM  0
    248 extern Symbol *getsym(unsigned id);
    249 extern void popctx(void);
    250 extern void pushctx(void);
    251 extern void freesym(Symbol *sym);
    252 
    253 /* globals */
    254 extern Symbol *curfun;
    255 extern Symbol *locals;
    256 extern Inst *pc, *prog;