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Annotation of 42BSD/usr.bin/f77/src/f77pass1/optim.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * structure to hold trees for optimization
        !             3:  */
        !             4: 
        !             5: typedef struct slt {
        !             6:        field           type;
        !             7:        field           flags;
        !             8:        short           lineno;
        !             9:        struct slt      *next, *prev;
        !            10:        struct slt      *nullslot;
        !            11:        expptr          expr;
        !            12:        int             label;
        !            13:        int             *ctlinfo;
        !            14: };
        !            15: 
        !            16: typedef struct slt *Slotp;
        !            17: 
        !            18: extern Slotp   firstslot, lastslot;    /* first, last slots in buffer */
        !            19: extern int     numslots;               /* number of slots */
        !            20: 
        !            21: Slotp newslot(), optbuff(), optinsert();
        !            22: struct Ctlframe *cpframe();
        !            23: 
        !            24: /*
        !            25: **      Structures for cse analysis
        !            26: */
        !            27: 
        !            28: typedef struct IDblock *idptr;
        !            29: typedef struct VALUEnode *valuen;
        !            30: typedef struct IDlist  *idlptr;
        !            31: typedef struct DUPlist *duplptr;
        !            32: typedef struct NODElist *nodelptr;
        !            33: 
        !            34: struct IDblock
        !            35: {
        !            36:        expptr idaddr;    
        !            37:        valuen initval, assgnval;
        !            38:        nodelptr headnodelist;
        !            39:        struct IDblock *next;
        !            40: };           
        !            41: 
        !            42: struct VALUEnode
        !            43: {
        !            44:        expptr opp;
        !            45:        expptr *parent;
        !            46:        int n_dups;
        !            47:        unsigned is_dead : 1;
        !            48:        valuen lc,rc,rs;
        !            49:        idlptr headdeplist;
        !            50:        duplptr headduplist;
        !            51:        struct VALUEnode *next;
        !            52: };
        !            53: 
        !            54: struct IDlist
        !            55: {
        !            56:        idptr idp;
        !            57:        struct IDlist *next;
        !            58: };
        !            59: 
        !            60: struct DUPlist
        !            61: {
        !            62:        expptr *parent;
        !            63:        struct DUPlist *next;
        !            64: };
        !            65: 
        !            66: struct NODElist
        !            67: {
        !            68:        valuen nodep;
        !            69:        struct NODElist *next;
        !            70: };
        !            71: 
        !            72: /*
        !            73:  * structure to hold information on basic blocks
        !            74:  */
        !            75: 
        !            76: 
        !            77: 
        !            78: typedef struct bblock {
        !            79:        Slotp           first, last;
        !            80:        idptr           headid;
        !            81:        valuen          headnode, tailnode;
        !            82:        struct bblock   *next, *prev;
        !            83: };
        !            84: 
        !            85: typedef struct bblock *Bblockp;
        !            86: 
        !            87: extern Bblockp firstblock;             /* first block in buffer */
        !            88: extern Bblockp lastblock;              /* last block in buffer */
        !            89: 
        !            90: 
        !            91: 
        !            92: /* data structure for optloop and regalloc routines */
        !            93: 
        !            94: typedef
        !            95:   struct regnode
        !            96:     {
        !            97:       field vstg;
        !            98:       field vtype;
        !            99:       int memno;
        !           100:       int memoffset;
        !           101:       unsigned isarrayarg : 1;
        !           102:     } REGNODE;

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