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https://github.com/mirror/tinycc.git
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optimisations: hash table for include file search, pool for symbol allocation - sympler token string allocation - '-b' fix with '-run' option
This commit is contained in:
bellard
parent
398e22c541
commit
48c85f1b15
185
tcc.c
185
tcc.c
@ -289,10 +289,13 @@ typedef struct TokenString {
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inclusion if the include file is protected by #ifndef ... #endif */
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typedef struct CachedInclude {
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int ifndef_macro;
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int hash_next; /* -1 if none */
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char type; /* '"' or '>' to give include type */
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char filename[1]; /* path specified in #include */
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} CachedInclude;
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#define CACHED_INCLUDES_HASH_SIZE 512
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/* parser */
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static struct BufferedFile *file;
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static int ch, tok;
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@ -319,7 +322,9 @@ static int parse_flags;
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static Section *text_section, *data_section, *bss_section; /* predefined sections */
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static Section *cur_text_section; /* current section where function code is
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generated */
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#ifdef CONFIG_TCC_ASM
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static Section *last_text_section; /* to handle .previous asm directive */
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#endif
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/* bound check related sections */
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static Section *bounds_section; /* contains global data bound description */
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static Section *lbounds_section; /* contains local data bound description */
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@ -352,6 +357,9 @@ static char *funcname;
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static Sym *global_stack, *local_stack;
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static Sym *define_stack;
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static Sym *global_label_stack, *local_label_stack;
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/* symbol allocator */
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#define SYM_POOL_NB (8192 / sizeof(Sym))
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static Sym *sym_free_first;
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static SValue vstack[VSTACK_SIZE], *vtop;
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/* some predefined types */
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@ -473,6 +481,9 @@ struct TCCState {
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/* see ifdef_stack_ptr */
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int ifdef_stack[IFDEF_STACK_SIZE];
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/* see cached_includes */
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int cached_includes_hash[CACHED_INCLUDES_HASH_SIZE];
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};
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/* The current value can be: */
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@ -1048,6 +1059,41 @@ static void dynarray_add(void ***ptab, int *nb_ptr, void *data)
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*nb_ptr = nb;
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}
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/* symbol allocator */
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static Sym *__sym_malloc(void)
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{
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Sym *sym_pool, *sym, *last_sym;
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int i;
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sym_pool = tcc_malloc(SYM_POOL_NB * sizeof(Sym));
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last_sym = sym_free_first;
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sym = sym_pool;
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for(i = 0; i < SYM_POOL_NB; i++) {
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sym->next = last_sym;
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last_sym = sym;
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sym++;
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}
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sym_free_first = last_sym;
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return last_sym;
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}
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static inline Sym *sym_malloc(void)
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{
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Sym *sym;
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sym = sym_free_first;
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if (!sym)
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sym = __sym_malloc();
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sym_free_first = sym->next;
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return sym;
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}
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static inline void sym_free(Sym *sym)
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{
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sym->next = sym_free_first;
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sym_free_first = sym;
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}
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Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
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{
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Section *sec;
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@ -1433,7 +1479,7 @@ static void cstr_realloc(CString *cstr, int new_size)
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}
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/* add a byte */
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static void cstr_ccat(CString *cstr, int ch)
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static inline void cstr_ccat(CString *cstr, int ch)
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{
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int size;
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size = cstr->size + 1;
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@ -1480,21 +1526,6 @@ static void cstr_free(CString *cstr)
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#define cstr_reset(cstr) cstr_free(cstr)
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static CString *cstr_dup(CString *cstr1)
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{
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CString *cstr;
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int size;
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cstr = tcc_malloc(sizeof(CString));
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size = cstr1->size;
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cstr->size = size;
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cstr->size_allocated = size;
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cstr->data_allocated = tcc_malloc(size);
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cstr->data = cstr->data_allocated;
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memcpy(cstr->data_allocated, cstr1->data_allocated, size);
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return cstr;
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}
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/* XXX: unicode ? */
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static void add_char(CString *cstr, int c)
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{
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@ -1618,7 +1649,7 @@ char *get_tok_str(int v, CValue *cv)
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static Sym *sym_push2(Sym **ps, int v, int t, int c)
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{
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Sym *s;
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s = tcc_malloc(sizeof(Sym));
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s = sym_malloc();
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s->v = v;
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s->type.t = t;
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s->c = c;
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@ -1726,7 +1757,7 @@ static void sym_pop(Sym **ptop, Sym *b)
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ps = &ts->sym_identifier;
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*ps = s->prev_tok;
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}
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tcc_free(s);
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sym_free(s);
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s = ss;
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}
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*ptop = b;
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@ -2194,11 +2225,13 @@ static inline int tok_ext_size(int t)
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case TOK_CUINT:
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case TOK_CCHAR:
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case TOK_LCHAR:
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case TOK_STR:
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case TOK_LSTR:
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case TOK_CFLOAT:
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case TOK_LINENUM:
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return 1;
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case TOK_STR:
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case TOK_LSTR:
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case TOK_PPNUM:
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error("unsupported token");
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return 1;
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case TOK_CDOUBLE:
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case TOK_CLLONG:
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@ -2223,48 +2256,6 @@ static inline void tok_str_new(TokenString *s)
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static void tok_str_free(int *str)
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{
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const int *p;
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CString *cstr;
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int t;
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p = str;
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for(;;) {
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t = *p;
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/* NOTE: we test zero separately so that GCC can generate a
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table for the following switch */
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if (t == 0)
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break;
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switch(t) {
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case TOK_CINT:
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case TOK_CUINT:
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case TOK_CCHAR:
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case TOK_LCHAR:
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case TOK_CFLOAT:
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case TOK_LINENUM:
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p += 2;
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break;
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case TOK_PPNUM:
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case TOK_STR:
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case TOK_LSTR:
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/* XXX: use a macro to be portable on 64 bit ? */
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cstr = (CString *)p[1];
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cstr_free(cstr);
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tcc_free(cstr);
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p += 2;
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break;
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case TOK_CDOUBLE:
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case TOK_CLLONG:
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case TOK_CULLONG:
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p += 3;
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break;
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case TOK_CLDOUBLE:
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p += 1 + (LDOUBLE_SIZE / 4);
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break;
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default:
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p++;
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break;
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}
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}
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tcc_free(str);
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}
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@ -2320,7 +2311,22 @@ static void tok_str_add2(TokenString *s, int t, CValue *cv)
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case TOK_PPNUM:
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case TOK_STR:
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case TOK_LSTR:
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str[len++] = (int)cstr_dup(cv->cstr);
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{
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int nb_words;
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CString *cstr;
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nb_words = (sizeof(CString) + cv->cstr->size + 3) >> 2;
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while ((len + nb_words) > s->allocated_len)
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str = tok_str_realloc(s);
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cstr = (CString *)(str + len);
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cstr->data = NULL;
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cstr->size = cv->cstr->size;
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cstr->data_allocated = NULL;
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cstr->size_allocated = cstr->size;
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memcpy((char *)cstr + sizeof(CString),
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cv->cstr->data, cstr->size);
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len += nb_words;
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}
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break;
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case TOK_CDOUBLE:
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case TOK_CLLONG:
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@ -2386,10 +2392,14 @@ static void tok_str_add_tok(TokenString *s)
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case TOK_LCHAR: \
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case TOK_CFLOAT: \
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case TOK_LINENUM: \
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cv.tab[0] = *p++; \
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break; \
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case TOK_STR: \
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case TOK_LSTR: \
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case TOK_PPNUM: \
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cv.tab[0] = *p++; \
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cv.cstr = (CString *)p; \
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cv.cstr->data = (char *)p + sizeof(CString);\
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p += (sizeof(CString) + cv.cstr->size + 3) >> 2;\
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break; \
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case TOK_CDOUBLE: \
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case TOK_CLLONG: \
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@ -2450,7 +2460,7 @@ static void free_defines(Sym *b)
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v = top->v;
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if (v >= TOK_IDENT && v < tok_ident)
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table_ident[v - TOK_IDENT]->sym_define = NULL;
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tcc_free(top);
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sym_free(top);
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top = top1;
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}
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define_stack = b;
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@ -2503,7 +2513,7 @@ static void label_pop(Sym **ptop, Sym *slast)
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}
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/* remove label */
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table_ident[s->v - TOK_IDENT]->sym_label = s->prev_tok;
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tcc_free(s);
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sym_free(s);
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}
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*ptop = slast;
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}
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@ -2619,17 +2629,37 @@ static void parse_define(void)
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define_push(v, t, str.str, first);
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}
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static inline int hash_cached_include(int type, const char *filename)
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{
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const unsigned char *s;
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unsigned int h;
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h = TOK_HASH_INIT;
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h = TOK_HASH_FUNC(h, type);
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s = filename;
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while (*s) {
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h = TOK_HASH_FUNC(h, *s);
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s++;
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}
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h &= (CACHED_INCLUDES_HASH_SIZE - 1);
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return h;
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}
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/* XXX: use a token or a hash table to accelerate matching ? */
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static CachedInclude *search_cached_include(TCCState *s1,
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int type, const char *filename)
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{
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CachedInclude *e;
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int i;
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for(i = 0;i < s1->nb_cached_includes; i++) {
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e = s1->cached_includes[i];
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int i, h;
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h = hash_cached_include(type, filename);
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i = s1->cached_includes_hash[h];
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for(;;) {
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if (i == 0)
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break;
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e = s1->cached_includes[i - 1];
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if (e->type == type && !strcmp(e->filename, filename))
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return e;
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i = e->hash_next;
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}
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return NULL;
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}
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@ -2638,6 +2668,7 @@ static inline void add_cached_include(TCCState *s1, int type,
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const char *filename, int ifndef_macro)
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{
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CachedInclude *e;
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int h;
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if (search_cached_include(s1, type, filename))
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return;
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@ -2651,6 +2682,10 @@ static inline void add_cached_include(TCCState *s1, int type,
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strcpy(e->filename, filename);
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e->ifndef_macro = ifndef_macro;
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dynarray_add((void ***)&s1->cached_includes, &s1->nb_cached_includes, e);
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/* add in hash table */
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h = hash_cached_include(type, filename);
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e->hash_next = s1->cached_includes_hash[h];
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s1->cached_includes_hash[h] = s1->nb_cached_includes;
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}
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/* is_bof is true if first non space token at beginning of file */
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@ -3989,7 +4024,7 @@ static int macro_subst_tok(TokenString *tok_str,
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while (sa) {
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sa1 = sa->prev;
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tok_str_free((int *)sa->c);
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tcc_free(sa);
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sym_free(sa);
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sa = sa1;
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}
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mstr_allocated = 1;
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@ -3999,7 +4034,7 @@ static int macro_subst_tok(TokenString *tok_str,
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/* pop nested defined symbol */
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sa1 = *nested_list;
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*nested_list = sa1->prev;
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tcc_free(sa1);
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sym_free(sa1);
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if (mstr_allocated)
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tok_str_free(mstr);
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}
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@ -9409,10 +9444,12 @@ int tcc_relocate(TCCState *s1)
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tcc_add_runtime(s1);
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build_got_entries(s1);
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relocate_common_syms();
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tcc_add_linker_symbols(s1);
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build_got_entries(s1);
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/* compute relocation address : section are relocated in place. We
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also alloc the bss space */
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for(i = 1; i < s1->nb_sections; i++) {
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