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 instruction_list *insns;
  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         struct symbol *type;
  44         struct basic_block *bb;
  45         int opcode;
  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 /* unops */ {
  61                         pseudo_t src;
  62                         struct symbol *orig_type;       /* casts */
  63                         unsigned int offset;            /* memops */
  64                 };
  65                 struct /* binops */ {
  66                         pseudo_t src1, src2;
  67                 };
  68                 struct /* slice */ {
  69                         pseudo_t base;
  70                         unsigned from, len;
  71                 };
  72                 struct /* multijump */ {
  73                         int begin, end;
  74                 };
  75                 struct /* setval */ {
  76                         pseudo_t symbol;                /* Subtle: same offset as "src" !! */
  77                         struct expression *val;
  78                 };
  79                 struct /* call */ {
  80                         pseudo_t func;
  81                         struct pseudo_list *arguments;
  82                 };
  83                 struct /* context */ {
  84                         int increment;
  85                 };
  86         };
  87 };
  88
  89 enum opcode {
  90         OP_BADOP,
  91         /* Terminator */
  92         OP_TERMINATOR,
  93         OP_RET = OP_TERMINATOR,
  94         OP_BR,
  95         OP_SWITCH,
  96         OP_INVOKE,
  97         OP_COMPUTEDGOTO,
  98         OP_UNWIND,
  99         OP_TERMINATOR_END = OP_UNWIND,
 100
 101         /* Binary */
 102         OP_BINARY,
 103         OP_ADD = OP_BINARY,
 104         OP_SUB,
 105         OP_MUL,
 106         OP_DIV,
 107         OP_MOD,
 108         OP_SHL,
 109         OP_SHR,
 110
 111         /* Logical */
 112         OP_AND,
 113         OP_OR,
 114         OP_XOR,
 115         OP_AND_BOOL,
 116         OP_OR_BOOL,
 117         OP_BINARY_END = OP_OR_BOOL,
 118
 119         /* Binary comparison */
 120         OP_BINCMP,
 121         OP_SET_EQ = OP_BINCMP,
 122         OP_SET_NE,
 123         OP_SET_LE,
 124         OP_SET_GE,
 125         OP_SET_LT,
 126         OP_SET_GT,
 127         OP_SET_B,
 128         OP_SET_A,
 129         OP_SET_BE,
 130         OP_SET_AE,
 131         OP_BINCMP_END = OP_SET_AE,
 132
 133         /* Uni */
 134         OP_NOT,
 135         OP_NEG,
 136
 137         /* Setcc - always in combination with a select or conditional branch */
 138         OP_SETCC,
 139         OP_SEL,
 140
 141         /* Memory */
 142         OP_MALLOC,
 143         OP_FREE,
 144         OP_ALLOCA,
 145         OP_LOAD,
 146         OP_STORE,
 147         OP_SETVAL,
 148         OP_GET_ELEMENT_PTR,
 149
 150         /* Other */
 151         OP_PHI,
 152         OP_PHISOURCE,
 153         OP_CAST,
 154         OP_CALL,
 155         OP_VANEXT,
 156         OP_VAARG,
 157         OP_SLICE,
 158         OP_SNOP,
 159         OP_LNOP,
 160         OP_NOP,
 161
 162         /* Sparse tagging (line numbers, context, whatever) */
 163         OP_CONTEXT,
 164 };
 165
 166 struct basic_block_list;
 167 struct instruction_list;
 168
 169 struct basic_block {
 170         struct position pos;
 171         unsigned long generation;
 172         int context;
 173         struct entrypoint *ep;
 174         struct basic_block_list *parents; /* sources */
 175         struct basic_block_list *children; /* destinations */
 176         struct instruction_list *insns; /* Linear list of instructions */
 177 };
 178
 179 static inline int is_branch_goto(struct instruction *br)
 180 {
 181         return br && br->opcode==OP_BR && (!br->bb_true || !br->bb_false);
 182 }
 183
 184 static inline void add_bb(struct basic_block_list **list, struct basic_block *bb)
 185 {
 186         add_ptr_list(list, bb);
 187 }
 188
 189 static inline void add_instruction(struct instruction_list **list, struct instruction *insn)
 190 {
 191         add_ptr_list(list, insn);
 192 }
 193
 194 static inline void add_multijmp(struct multijmp_list **list, struct multijmp *multijmp)
 195 {
 196         add_ptr_list(list, multijmp);
 197 }
 198
 199 static inline void *add_pseudo(struct pseudo_list **list, struct pseudo *pseudo)
 200 {
 201         return add_ptr_list(list, pseudo);
 202 }
 203
 204
 205 static inline int bb_terminated(struct basic_block *bb)
 206 {
 207         struct instruction *insn;
 208         if (!bb)
 209                 return 0;
 210         insn = last_instruction(bb->insns);
 211         return insn && insn->opcode >= OP_RET && insn->opcode <= OP_UNWIND;
 212 }
 213
 214 static inline int bb_reachable(struct basic_block *bb)
 215 {
 216         return bb != NULL;
 217 }
 218
 219 static inline void add_pseudo_ptr(pseudo_t *ptr, struct pseudo_ptr_list **list)
 220 {
 221         add_ptr_list(list, ptr);
 222 }
 223
 224 static inline int has_use_list(pseudo_t p)
 225 {
 226         return (p && p->type != PSEUDO_VOID && p->type != PSEUDO_VAL);
 227 }
 228
 229 static inline void use_pseudo(pseudo_t p, pseudo_t *pp)
 230 {
 231         *pp = p;
 232         if (has_use_list(p))
 233                 add_pseudo_ptr(pp, &p->users);
 234 }
 235
 236 static inline void remove_bb_from_list(struct basic_block_list **list, struct basic_block *entry, int count)
 237 {
 238         delete_ptr_list_entry((struct ptr_list **)list, entry, count);
 239 }
 240
 241 static inline void replace_bb_in_list(struct basic_block_list **list,
 242         struct basic_block *old, struct basic_block *new, int count)
 243 {
 244         replace_ptr_list_entry((struct ptr_list **)list, old, new, count);
 245 }
 246
 247 struct entrypoint {
 248         struct symbol *name;
 249         struct symbol_list *syms;
 250         struct symbol_list *accesses;
 251         struct basic_block_list *bbs;
 252         struct basic_block *active;
 253         struct basic_block *entry;
 254         struct pseudo_list *pseudos;
 255 };
 256
 257 extern void insert_select(struct basic_block *bb, struct instruction *br, struct instruction *phi, pseudo_t true, pseudo_t false);
 258 extern void insert_branch(struct basic_block *bb, struct instruction *br, struct basic_block *target);
 259
 260 pseudo_t alloc_phi(struct basic_block *source, pseudo_t pseudo);
 261 pseudo_t alloc_pseudo(struct instruction *def);
 262 pseudo_t value_pseudo(long long val);
 263
 264 struct entrypoint *linearize_symbol(struct symbol *sym);
 265 void show_entry(struct entrypoint *ep);
 266
 267 #endif /* LINEARIZE_H */
 268