config.h

unix环境下实现的cmm语言编译器

typedef struct {
	void (*emit2)(Node);
	void (*doarg)(Node);
	void (*target)(Node);
} Xinterface;

extern int      argoffset, maxargoffset;
extern unsigned freemask;
extern int      offset, maxoffset;
extern Symbol   rmap[];
typedef struct {
	unsigned marked:1; 			/*标记结点已经标记过*/
	unsigned isinstruction:1; 	/*标记结点是否需要生成指令*/
	unsigned emitted:1;			/*标记结点已经发送代码*/
	unsigned spills:1; 			/*标记结点已经溢出*/
} Xnode;						/*dag结点的后端*/
typedef struct {
	Symbol vbl; 				/*指向寄存器变量的符号表入口*/
	short number;				/*寄存器的编号*/
	unsigned mask;
} *Regnode;						/*标示寄存器*/
typedef struct {
	char *name;
	int offset;					/*局部标示符在栈中的偏移值*/
	Node lastuse;				/*指向最后使用寄存器的结点*/
	Regnode regnode;	
	Symbol *wildcard;			/*通用寄存器组*/
} Xsymbol;						/*符号的后端*/
enum { RX=2 };
typedef struct {
	int offset;
} Env;


enum { VREG=(29<<3) };

extern void             blockbeg(Env *);
extern void             blockend(Env *);
extern void             gen(Node);
extern void				def_array_end(void);
extern void				set_eax(Node p);
extern void				set_edx(Node p);
extern void				put_eax(void);
extern void				put_edx(void);
extern void				putreg(Symbol r);
extern int				equal_reg(Node p, Node kid);