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#ifndef SSA_H
#define SSA_H
#include "const.h"
#include "semantics.h"
typedef struct COpr COpr;
typedef COpr *COpr_t;
struct COpr {
enum {
VAR,
TMP,
IMM,
IMMS
} kind;
union {
CVar_t var;
int imm;
char *str;
} info;
};
typedef struct CInst CInst;
typedef CInst *CInst_t;
struct CInst {
enum {
MOVE,
BEQZ, /* conditional jump */
BNEZ,
GOTO, /* unconditional jump */
ARR, /* displacement */
WARR,
PUSH, /* push to stack top */
CALL, /* call function */
RET, /* return */
MUL, DIV, MOD, ADD, SUB,
SHL, SHR, AND, XOR, OR,
LOR, LAND, NEG, NOR, SEQ,
EQ, NE, LT, GT, LE, GE
} op;
COpr_t dest, src1, src2;
CInst_t next, prev;
};
typedef struct COprList COprList;
typedef COprList *COprList_t;
struct COprList {
COpr opr;
COprList_t next;
};
typedef struct CPhi CPhi;
typedef CPhi *CPhi_t;
struct CPhi {
COpr dest;
COprList_t params;
};
typedef struct CBlock CBlock;
typedef CBlock *CBlock_t;
struct CBlock {
CPhi_t phis;
CInst_t insts; /* instructions */
CBlock_t next, prev;
int id;
int ref; /* if referenced by any gotos */
};
CBlock_t cblock_create();
void cblock_append(CBlock_t cblk, CInst_t inst);
CInst_t cblock_getback(CBlock_t cblk);
int cblock_isempty(CBlock_t cblk);
typedef struct CEdge CEdge;
typedef struct CGraph {
struct CEdge {
CBlock *to;
CEdge *next;
} *head[MAX_BLOCK], *rhead[MAX_BLOCK];
} CGraph;
void ssa_generate(CScope_t scope);
#endif
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