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 asm_constraint {
  43         pseudo_t pseudo;
  44         const char *constraint;
  45         const struct ident *ident;
  46 };
  47
  48 DECLARE_PTR_LIST(asm_constraint_list, struct asm_constraint);
  49
  50 struct asm_rules {
  51         struct asm_constraint_list *inputs;
  52         struct asm_constraint_list *outputs;
  53         struct asm_constraint_list *clobbers;
  54 };
  55
  56 struct instruction {
  57         unsigned opcode:8,
  58                  size:24;
  59         struct basic_block *bb;
  60         union {
  61                 pseudo_t target;
  62                 pseudo_t cond;          /* for branch and switch */
  63         };
  64         union {
  65                 struct /* entrypoint */ {
  66                         struct pseudo_list *arg_list;
  67                 };
  68                 struct /* branch */ {
  69                         struct basic_block *bb_true, *bb_false;
  70                 };
  71                 struct /* switch */ {
  72                         struct multijmp_list *multijmp_list;
  73                 };
  74                 struct /* phi_node */ {
  75                         struct pseudo_list *phi_list;
  76                 };
  77                 struct /* phi source */ {
  78                         pseudo_t phi_src;
  79                         struct instruction_list *phi_users;
  80                 };
  81                 struct /* unops */ {
  82                         pseudo_t src;
  83                         struct symbol *orig_type;       /* casts */
  84                         unsigned int offset;            /* memops */
  85                 };
  86                 struct /* binops and sel */ {
  87                         pseudo_t src1, src2, src3;
  88                 };
  89                 struct /* slice */ {
  90                         pseudo_t base;
  91                         unsigned from, len;
  92                 };
  93                 struct /* multijump */ {
  94                         int begin, end;
  95                 };
  96                 struct /* setval */ {
  97                         pseudo_t symbol;                /* Subtle: same offset as "src" !! */
  98                         struct expression *val;
  99                 };
 100                 struct /* call */ {
 101                         pseudo_t func;
 102                         struct pseudo_list *arguments;
 103                 };
 104                 struct /* context */ {
 105                         int increment;
 106                 };
 107                 struct /* asm */ {
 108                         const char *string;
 109                         struct asm_rules *asm_rules;
 110                 };
 111         };
 112 };
 113
 114 enum opcode {
 115         OP_BADOP,
 116
 117         /* Entry */
 118         OP_ENTRY,
 119
 120         /* Terminator */
 121         OP_TERMINATOR,
 122         OP_RET = OP_TERMINATOR,
 123         OP_BR,
 124         OP_SWITCH,
 125         OP_INVOKE,
 126         OP_COMPUTEDGOTO,
 127         OP_UNWIND,
 128         OP_TERMINATOR_END = OP_UNWIND,
 129
 130         /* Binary */
 131         OP_BINARY,
 132         OP_ADD = OP_BINARY,
 133         OP_SUB,
 134         OP_MUL,
 135         OP_DIV,
 136         OP_MOD,
 137         OP_SHL,
 138         OP_SHR,
 139
 140         /* Logical */
 141         OP_AND,
 142         OP_OR,
 143         OP_XOR,
 144         OP_AND_BOOL,
 145         OP_OR_BOOL,
 146         OP_BINARY_END = OP_OR_BOOL,
 147
 148         /* Binary comparison */
 149         OP_BINCMP,
 150         OP_SET_EQ = OP_BINCMP,
 151         OP_SET_NE,
 152         OP_SET_LE,
 153         OP_SET_GE,
 154         OP_SET_LT,
 155         OP_SET_GT,
 156         OP_SET_B,
 157         OP_SET_A,
 158         OP_SET_BE,
 159         OP_SET_AE,
 160         OP_BINCMP_END = OP_SET_AE,
 161
 162         /* Uni */
 163         OP_NOT,
 164         OP_NEG,
 165
 166         /* Select - three input values */
 167         OP_SEL,
 168
 169         /* Memory */
 170         OP_MALLOC,
 171         OP_FREE,
 172         OP_ALLOCA,
 173         OP_LOAD,
 174         OP_STORE,
 175         OP_SETVAL,
 176         OP_SYMADDR,
 177         OP_GET_ELEMENT_PTR,
 178
 179         /* Other */
 180         OP_PHI,
 181         OP_PHISOURCE,
 182         OP_CAST,
 183         OP_PTRCAST,
 184         OP_CALL,
 185         OP_VANEXT,
 186         OP_VAARG,
 187         OP_SLICE,
 188         OP_SNOP,
 189         OP_LNOP,
 190         OP_NOP,
 191         OP_DEATHNOTE,
 192         OP_ASM,
 193
 194         /* Sparse tagging (line numbers, context, whatever) */
 195         OP_CONTEXT,
 196 };
 197
 198 struct basic_block_list;
 199 struct instruction_list;
 200
 201 struct basic_block {
 202         struct position pos;
 203         unsigned long generation;
 204         int context;
 205         struct entrypoint *ep;
 206         struct basic_block_list *parents; /* sources */
 207         struct basic_block_list *children; /* destinations */
 208         struct instruction_list *insns; /* Linear list of instructions */
 209         struct pseudo_list *needs, *defines;
 210 };
 211
 212 static inline int is_branch_goto(struct instruction *br)
 213 {
 214         return br && br->opcode==OP_BR && (!br->bb_true || !br->bb_false);
 215 }
 216
 217 static inline void add_bb(struct basic_block_list **list, struct basic_block *bb)
 218 {
 219         add_ptr_list(list, bb);
 220 }
 221
 222 static inline void add_instruction(struct instruction_list **list, struct instruction *insn)
 223 {
 224         add_ptr_list(list, insn);
 225 }
 226
 227 static inline void add_multijmp(struct multijmp_list **list, struct multijmp *multijmp)
 228 {
 229         add_ptr_list(list, multijmp);
 230 }
 231
 232 static inline void *add_pseudo(struct pseudo_list **list, struct pseudo *pseudo)
 233 {
 234         return add_ptr_list(list, pseudo);
 235 }
 236
 237 static inline int remove_pseudo(struct pseudo_list **list, pseudo_t pseudo)
 238 {
 239         return delete_ptr_list_entry((struct ptr_list **)list, pseudo, 0) != 0;
 240 }
 241
 242 static inline int bb_terminated(struct basic_block *bb)
 243 {
 244         struct instruction *insn;
 245         if (!bb)
 246                 return 0;
 247         insn = last_instruction(bb->insns);
 248         return insn && insn->opcode >= OP_RET && insn->opcode <= OP_UNWIND;
 249 }
 250
 251 static inline int bb_reachable(struct basic_block *bb)
 252 {
 253         return bb != NULL;
 254 }
 255
 256 static inline void add_pseudo_ptr(pseudo_t *ptr, struct pseudo_ptr_list **list)
 257 {
 258         add_ptr_list(list, ptr);
 259 }
 260
 261 static inline int has_use_list(pseudo_t p)
 262 {
 263         return (p && p->type != PSEUDO_VOID && p->type != PSEUDO_VAL);
 264 }
 265
 266 static inline void use_pseudo(pseudo_t p, pseudo_t *pp)
 267 {
 268         *pp = p;
 269         if (has_use_list(p))
 270                 add_pseudo_ptr(pp, &p->users);
 271 }
 272
 273 static inline void remove_bb_from_list(struct basic_block_list **list, struct basic_block *entry, int count)
 274 {
 275         delete_ptr_list_entry((struct ptr_list **)list, entry, count);
 276 }
 277
 278 static inline void replace_bb_in_list(struct basic_block_list **list,
 279         struct basic_block *old, struct basic_block *new, int count)
 280 {
 281         replace_ptr_list_entry((struct ptr_list **)list, old, new, count);
 282 }
 283
 284 struct entrypoint {
 285         struct symbol *name;
 286         struct symbol_list *syms;
 287         struct symbol_list *accesses;
 288         struct basic_block_list *bbs;
 289         struct basic_block *active;
 290         struct instruction *entry;
 291 };
 292
 293 extern void insert_select(struct basic_block *bb, struct instruction *br, struct instruction *phi, pseudo_t true, pseudo_t false);
 294 extern void insert_branch(struct basic_block *bb, struct instruction *br, struct basic_block *target);
 295
 296 pseudo_t alloc_phi(struct basic_block *source, pseudo_t pseudo, int size);
 297 pseudo_t alloc_pseudo(struct instruction *def);
 298 pseudo_t value_pseudo(long long val);
 299
 300 struct entrypoint *linearize_symbol(struct symbol *sym);
 301 void show_entry(struct entrypoint *ep);
 302 const char *show_pseudo(pseudo_t pseudo);
 303 void show_bb(struct basic_block *bb);
 304 const char *show_instruction(struct instruction *insn);
 305
 306 #endif /* LINEARIZE_H */
 307