linearize.h

   1 #ifndef LINEARIZE_H
   2 #define LINEARIZE_H
   3
   4 #include "lib.h"
   5 #include "token.h"
   6 #include "parse.h"
   7 #include "symbol.h"
   8
   9 struct instruction;
  10 DECLARE_PTR_LIST(pseudo_ptr_list, pseudo_t);
  11
  12 enum pseudo_type {
  13         PSEUDO_VOID,
  14         PSEUDO_REG,
  15         PSEUDO_SYM,
  16         PSEUDO_VAL,
  17         PSEUDO_ARG,
  18         PSEUDO_PHI,
  19 };
  20
  21 struct pseudo {
  22         int nr;
  23         enum pseudo_type type;
  24         struct pseudo_ptr_list *users;
  25         struct ident *ident;
  26         union {
  27                 struct symbol *sym;
  28                 struct instruction *def;
  29                 long long value;
  30         };
  31 };
  32
  33 extern struct pseudo void_pseudo;
  34
  35 #define VOID (&void_pseudo)
  36
  37 struct multijmp {
  38         struct basic_block *target;
  39         int begin, end;
  40 };
  41
  42 struct instruction {
  43         unsigned opcode:8,
  44                  size:24;
  45         struct basic_block *bb;
  46         union {
  47                 pseudo_t target;
  48                 pseudo_t cond;          /* for branch and switch */
  49         };
  50         union {
  51                 struct /* branch */ {
  52                         struct basic_block *bb_true, *bb_false;
  53                 };
  54                 struct /* switch */ {
  55                         struct multijmp_list *multijmp_list;
  56                 };
  57                 struct /* phi_node */ {
  58                         struct pseudo_list *phi_list;
  59                 };
  60                 struct /* phi source */ {
  61                         pseudo_t phi_src;
  62                         struct instruction_list *phi_users;
  63                 };
  64                 struct /* unops */ {
  65                         pseudo_t src;
  66                         struct symbol *orig_type;       /* casts */
  67                         unsigned int offset;            /* memops */
  68                 };
  69                 struct /* binops and sel */ {
  70                         pseudo_t src1, src2, src3;
  71                 };
  72                 struct /* slice */ {
  73                         pseudo_t base;
  74                         unsigned from, len;
  75                 };
  76                 struct /* multijump */ {
  77                         int begin, end;
  78                 };
  79                 struct /* setval */ {
  80                         pseudo_t symbol;                /* Subtle: same offset as "src" !! */
  81                         struct expression *val;
  82                 };
  83                 struct /* call */ {
  84                         pseudo_t func;
  85                         struct pseudo_list *arguments;
  86                 };
  87                 struct /* context */ {
  88                         int increment;
  89                 };
  90                 struct /* asm */ {
  91                         const char *string;
  92                         struct pseudo_list *outputs;
  93                         struct pseudo_list *inputs;
  94                 };
  95         };
  96 };
  97
  98 enum opcode {
  99         OP_BADOP,
 100
 101         /* Entry */
 102         OP_ENTRY,
 103
 104         /* Terminator */
 105         OP_TERMINATOR,
 106         OP_RET = OP_TERMINATOR,
 107         OP_BR,
 108         OP_SWITCH,
 109         OP_INVOKE,
 110         OP_COMPUTEDGOTO,
 111         OP_UNWIND,
 112         OP_TERMINATOR_END = OP_UNWIND,
 113
 114         /* Binary */
 115         OP_BINARY,
 116         OP_ADD = OP_BINARY,
 117         OP_SUB,
 118         OP_MUL,
 119         OP_DIV,
 120         OP_MOD,
 121         OP_SHL,
 122         OP_SHR,
 123
 124         /* Logical */
 125         OP_AND,
 126         OP_OR,
 127         OP_XOR,
 128         OP_AND_BOOL,
 129         OP_OR_BOOL,
 130         OP_BINARY_END = OP_OR_BOOL,
 131
 132         /* Binary comparison */
 133         OP_BINCMP,
 134         OP_SET_EQ = OP_BINCMP,
 135         OP_SET_NE,
 136         OP_SET_LE,
 137         OP_SET_GE,
 138         OP_SET_LT,
 139         OP_SET_GT,
 140         OP_SET_B,
 141         OP_SET_A,
 142         OP_SET_BE,
 143         OP_SET_AE,
 144         OP_BINCMP_END = OP_SET_AE,
 145
 146         /* Uni */
 147         OP_NOT,
 148         OP_NEG,
 149
 150         /* Select - three input values */
 151         OP_SEL,
 152
 153         /* Memory */
 154         OP_MALLOC,
 155         OP_FREE,
 156         OP_ALLOCA,
 157         OP_LOAD,
 158         OP_STORE,
 159         OP_SETVAL,
 160         OP_GET_ELEMENT_PTR,
 161
 162         /* Other */
 163         OP_PHI,
 164         OP_PHISOURCE,
 165         OP_CAST,
 166         OP_PTRCAST,
 167         OP_CALL,
 168         OP_VANEXT,
 169         OP_VAARG,
 170         OP_SLICE,
 171         OP_SNOP,
 172         OP_LNOP,
 173         OP_NOP,
 174         OP_DEATHNOTE,
 175         OP_ASM,
 176
 177         /* Sparse tagging (line numbers, context, whatever) */
 178         OP_CONTEXT,
 179 };
 180
 181 struct basic_block_list;
 182 struct instruction_list;
 183
 184 struct basic_block {
 185         struct position pos;
 186         unsigned long generation;
 187         int context;
 188         struct entrypoint *ep;
 189         struct basic_block_list *parents; /* sources */
 190         struct basic_block_list *children; /* destinations */
 191         struct instruction_list *insns; /* Linear list of instructions */
 192         struct pseudo_list *needs, *defines;
 193 };
 194
 195 static inline int is_branch_goto(struct instruction *br)
 196 {
 197         return br && br->opcode==OP_BR && (!br->bb_true || !br->bb_false);
 198 }
 199
 200 static inline void add_bb(struct basic_block_list **list, struct basic_block *bb)
 201 {
 202         add_ptr_list(list, bb);
 203 }
 204
 205 static inline void add_instruction(struct instruction_list **list, struct instruction *insn)
 206 {
 207         add_ptr_list(list, insn);
 208 }
 209
 210 static inline void add_multijmp(struct multijmp_list **list, struct multijmp *multijmp)
 211 {
 212         add_ptr_list(list, multijmp);
 213 }
 214
 215 static inline void *add_pseudo(struct pseudo_list **list, struct pseudo *pseudo)
 216 {
 217         return add_ptr_list(list, pseudo);
 218 }
 219
 220
 221 static inline int bb_terminated(struct basic_block *bb)
 222 {
 223         struct instruction *insn;
 224         if (!bb)
 225                 return 0;
 226         insn = last_instruction(bb->insns);
 227         return insn && insn->opcode >= OP_RET && insn->opcode <= OP_UNWIND;
 228 }
 229
 230 static inline int bb_reachable(struct basic_block *bb)
 231 {
 232         return bb != NULL;
 233 }
 234
 235 static inline void add_pseudo_ptr(pseudo_t *ptr, struct pseudo_ptr_list **list)
 236 {
 237         add_ptr_list(list, ptr);
 238 }
 239
 240 static inline int has_use_list(pseudo_t p)
 241 {
 242         return (p && p->type != PSEUDO_VOID && p->type != PSEUDO_VAL);
 243 }
 244
 245 static inline void use_pseudo(pseudo_t p, pseudo_t *pp)
 246 {
 247         *pp = p;
 248         if (has_use_list(p))
 249                 add_pseudo_ptr(pp, &p->users);
 250 }
 251
 252 static inline void remove_bb_from_list(struct basic_block_list **list, struct basic_block *entry, int count)
 253 {
 254         delete_ptr_list_entry((struct ptr_list **)list, entry, count);
 255 }
 256
 257 static inline void replace_bb_in_list(struct basic_block_list **list,
 258         struct basic_block *old, struct basic_block *new, int count)
 259 {
 260         replace_ptr_list_entry((struct ptr_list **)list, old, new, count);
 261 }
 262
 263 struct entrypoint {
 264         struct symbol *name;
 265         struct symbol_list *syms;
 266         struct symbol_list *accesses;
 267         struct basic_block_list *bbs;
 268         struct basic_block *active;
 269         struct instruction *entry;
 270 };
 271
 272 extern void insert_select(struct basic_block *bb, struct instruction *br, struct instruction *phi, pseudo_t true, pseudo_t false);
 273 extern void insert_branch(struct basic_block *bb, struct instruction *br, struct basic_block *target);
 274
 275 pseudo_t alloc_phi(struct basic_block *source, pseudo_t pseudo, int size);
 276 pseudo_t alloc_pseudo(struct instruction *def);
 277 pseudo_t value_pseudo(long long val);
 278
 279 struct entrypoint *linearize_symbol(struct symbol *sym);
 280 void show_entry(struct entrypoint *ep);
 281 const char *show_pseudo(pseudo_t pseudo);
 282 void show_bb(struct basic_block *bb);
 283 void show_instruction(struct instruction *insn);
 284
 285 #endif /* LINEARIZE_H */
 286