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symbol.h
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symbol.h
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#ifndef __SYMBOL_H_
#define __SYMBOL_H_
enum
{
SK_Tag, SK_TypedefName, SK_EnumConstant, SK_Constant, SK_Variable, SK_Temp,
SK_Offset, SK_String, SK_Label, SK_Function, SK_Register
};
#define SYM_HASH_MASK 127
#define SYMBOL_COMMON \
int kind; \
char *name; \
char *aname; \
Type ty; \
int level; \
int sclass; \
int ref; \
int defined : 1; \
int addressed : 1; \
int needwb : 1; \
int unused : 29; \
union value val; \
struct symbol *reg; \
struct symbol *link; \
struct symbol *next;
typedef struct bblock *BBlock;
typedef struct initData *InitData;
typedef struct symbol
{
SYMBOL_COMMON
} *Symbol;
typedef struct valueDef
{
Symbol dst;
int op;
Symbol src1;
Symbol src2;
BBlock ownBB;
struct valueDef *link;
} *ValueDef;
typedef struct valueUse
{
ValueDef def;
struct valueUse *next;
} *ValueUse;
typedef struct variableSymbol
{
SYMBOL_COMMON
InitData idata;
ValueDef def;
ValueUse uses;
int offset;
} *VariableSymbol;
typedef struct functionSymbol
{
SYMBOL_COMMON
Symbol params;
Symbol locals;
Symbol *lastv;
int nbblock;
BBlock entryBB;
BBlock exitBB;
ValueDef valNumTable[16];
} *FunctionSymbol;
typedef struct table
{
Symbol *buckets;
int level;
struct table *outer;
} *Table;
#define AsVar(sym) ((VariableSymbol)sym)
#define AsFunc(sym) ((FunctionSymbol)sym)
void InitSymbolTable(void);
void EnterScope(void);
void ExitScope(void);
Symbol LookupID(char *id);
Symbol LookupTag(char *id);
Symbol AddConstant(Type ty, union value val);
Symbol AddEnumConstant(char *id, Type ty, int val);
Symbol AddTypedefName(char *id, Type ty);
Symbol AddVariable(char *id, Type ty, int sclass);
Symbol AddFunction(char *id, Type ty, int sclass);
Symbol AddTag(char *id, Type ty);
Symbol IntConstant(int i);
Symbol CreateTemp(Type ty);
Symbol CreateLabel(void);
Symbol AddString(Type ty, String str);
Symbol CreateOffset(Type ty, Symbol base, int offset);
extern int Level;
extern int LabelNum, TempNum;
extern Symbol Functions;
extern Symbol Globals;
extern Symbol Strings;
extern Symbol FloatConstants;
extern FunctionSymbol FSYM;
#endif