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typedef struct Cfg Cfg;
typedef struct Bb Bb;
typedef struct Reaching Reaching;
struct Cfg {
Node *fn;
Bb **bb;
Bb *start;
Bb *end;
size_t nbb;
/* for building bb */
int nextbbid;
Htab *lblmap; /* label => Bb mapping */
Node **fixjmp;
size_t nfixjmp;
Bb **fixblk;
size_t nfixblk;
};
struct Bb {
int id;
char **lbls;
size_t nlbls;
Node **nl;
size_t nnl;
Bitset *pred;
Bitset *succ;
};
struct Reaching {
Bitset **in;
Bitset **out;
size_t **defs;
size_t *ndefs;
};
/* expression folding */
Node *fold(Node *n, int foldvar);
/* dataflow analysis */
Reaching *reaching(Cfg *cfg);
Node *assignee(Node *n);
/* Takes a reduced block, and returns a flow graph. */
Cfg *mkcfg(Node *fn, Node **nl, size_t nn);
void dumpcfg(Cfg *c, FILE *fd);
void check(Cfg *cfg);
/* pattern matching */
void genmatch(Node *m, Node *val, Node ***out, size_t *nout);
void genonematch(Node *pat, Node *val, Node *iftrue, Node *iffalse, Node ***out, size_t *nout, Node ***cap, size_t *ncap);
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