pike.git/src/las.c:40f524145d9abdfbdf0ead16eb181ee26da25690

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5222 5223 5224 5225 5226 5227 5228 5229 5230 5231 5232 5233 5234 5235 5236 5237 5238 5239 5240 5241 5242 5243 5244 5245 5246 5247 5248 5249 5250 5251 5252 5253 5254 5255 5256 5257 5258 5259 5260 5261 5262 5263 5264 5265 5266 5267 5268 5269 5270 5271 5272 5273 5274 5275 5276 5277 5278 5279 5280 5281 5282 5283 5284 5285 5286 5287 5288 5289 5290 5291 5292 5293 5294 5295 5296 5297 5298 5299 5300 5301 5302 5303 5304 5305 5306 5307 5308 5309 5310 5311 5312 5313 5314 5315 5316 5317 5318 5319 5320 5321 5322 5323 /*\ ||| This file a part of Pike, and is copyright by Fredrik Hubinette ||| Pike is distributed as GPL (General Public License) ||| See the files COPYING and DISCLAIMER for more information. \*/ /**/ #include "global.h" RCSID("$Id: las.c,v 1.255 2001/07/02 20:09:17 mast Exp $"); #include "language.h" #include "interpret.h" #include "las.h" #include "array.h" #include "object.h" #include "stralloc.h" #include "dynamic_buffer.h" #include "lex.h" #include "pike_types.h" #include "constants.h" #include "mapping.h" #include "multiset.h" #include "pike_error.h" #include "docode.h" #include "main.h" #include "pike_memory.h" #include "operators.h" #include "callback.h" #include "pike_macros.h" #include "peep.h" #include "builtin_functions.h" #include "cyclic.h" #include "block_alloc.h" #include "opcodes.h" #define LASDEBUG int lasdebug=0; static node *eval(node *); static void optimize(node *n); static node *localopt(node *n); int cumulative_parse_error=0; extern char *get_type_name(int); #define MAX_GLOBAL 2048 /* #define yywarning my_yyerror */ int car_is_node(node *n) { switch(n->token) { case F_EXTERNAL: case F_IDENTIFIER: case F_TRAMPOLINE: case F_CONSTANT: case F_LOCAL: return 0; default: return !!_CAR(n); } } int cdr_is_node(node *n) { switch(n->token) { case F_EXTERNAL: case F_IDENTIFIER: case F_TRAMPOLINE: case F_CONSTANT: case F_LOCAL: return 0; default: return !!_CDR(n); } } int node_is_leaf(node *n) { switch(n->token) { case F_EXTERNAL: case F_IDENTIFIER: case F_TRAMPOLINE: case F_CONSTANT: case F_LOCAL: return 1; } return 0; } #ifdef PIKE_DEBUG void check_tree(node *n, int depth) { node *orig_n = n; node *parent; if(!d_flag) return; if (!n) return; parent = n->parent; n->parent = NULL; while(n) { if(n->token==USHRT_MAX) fatal("Free node in tree.\n"); check_node_hash(n); switch(n->token) { case F_EXTERNAL: if(n->type) { int parent_id = n->u.integer.a; int id_no = n->u.integer.b; struct program_state *state = Pike_compiler; while (state && (state->new_program->id != parent_id)) { state = state->previous; } if (state) { struct identifier *id = ID_FROM_INT(state->new_program, id_no); if (id) { #ifdef PIKE_DEBUG /* FIXME: This test crashes on valid code because the type of the * identifier can change in pass 2 - Hubbe */ if(id->type != n->type) { printf("Type of external node is not matching it's identifier.\nid->type: "); simple_describe_type(id->type); printf("\nn->type : "); simple_describe_type(n->type); printf("\n"); fatal("Type of external node is not matching it's identifier.\n"); } #endif } } } } if(d_flag<2) break; if(!(depth & 1023)) { node *q; for(q=n->parent;q;q=q->parent) if(q->parent==n) fatal("Cyclic node structure found.\n"); } if(car_is_node(n)) { /* Check CAR */ #ifdef SHARED_NODES CAR(n)->parent = n; #else /* !SHARED_NODES */ if(CAR(n)->parent != n) fatal("Parent is wrong.\n"); #endif /* SHARED_NODES */ depth++; n = CAR(n); continue; } if(cdr_is_node(n)) { /* Check CDR */ #ifdef SHARED_NODES CDR(n)->parent = n; #else /* !SHARED_NODES */ if(CDR(n)->parent != n) fatal("Parent is wrong.\n"); #endif /* !SHARED_NODES */ depth++; n = CDR(n); continue; } while(n->parent && (!cdr_is_node(n->parent) || (CDR(n->parent) == n))) { /* Backtrack */ n = n->parent; depth--; } if (n->parent && cdr_is_node(n->parent)) { /* Jump to the sibling */ #ifdef SHARED_NODES CDR(n->parent)->parent = n->parent; #else /* !SHARED_NODES */ if(CDR(n->parent)->parent != n->parent) fatal("Parent is wrong.\n"); #endif /* !SHARED_NODES */ n = CDR(n->parent); continue; } break; } if (n != orig_n) { fprintf(stderr, "check_tree() lost track.\n"); d_flag = 0; fprintf(stderr, "n:"); print_tree(n); fprintf(stderr, "orig_n:"); print_tree(orig_n); fatal("check_tree() lost track.\n"); } n->parent = parent; } #endif /* FIXME: Ought to use parent pointer to avoid recursion. */ INT32 count_args(node *n) { int a,b; check_tree(n,0); fatal_check_c_stack(16384); if(!n) return 0; switch(n->token) { case F_COMMA_EXPR: case F_VAL_LVAL: case F_ARG_LIST: a=count_args(CAR(n)); if(a==-1) return -1; b=count_args(CDR(n)); if(b==-1) return -1; return a+b; case F_CAST: if(n->type == void_type_string) return 0; else return count_args(CAR(n)); case F_SOFT_CAST: return count_args(CAR(n)); case F_CASE: case F_FOR: case F_DO: case F_LOOP: case F_INC_LOOP: case F_DEC_LOOP: case F_DEC_NEQ_LOOP: case F_INC_NEQ_LOOP: case F_BREAK: case F_RETURN: case F_CONTINUE: case F_FOREACH: return 0; case '?': { int tmp1,tmp2; tmp1=count_args(CADR(n)); tmp2=count_args(CDDR(n)); if(tmp1==-1 || tmp2==-1) return -1; if(tmp1 < tmp2) return tmp1; return tmp2; } case F_PUSH_ARRAY: return -1; case F_APPLY: if(CAR(n)->token == F_CONSTANT && CAR(n)->u.sval.type == T_FUNCTION && CAR(n)->u.sval.subtype == FUNCTION_BUILTIN && n->type == void_type_string) return 0; return 1; default: if(n->type == void_type_string) return 0; return 1; } } /* FIXME: Ought to use parent pointer to avoid recursion. */ struct pike_type *find_return_type(node *n) { struct pike_type *a, *b; check_tree(n,0); fatal_check_c_stack(16384); if(!n) return 0; if (n->token == F_RETURN) { if (CAR(n)) { if (CAR(n)->type) { copy_pike_type(a, CAR(n)->type); } else { #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "Return with untyped argument.\n"); print_tree(n); } #endif /* PIKE_DEBUG */ copy_pike_type(a, mixed_type_string); } } else { copy_pike_type(a, zero_type_string); } return a; } if(!(n->tree_info & OPT_RETURN)) return 0; if(car_is_node(n)) a=find_return_type(CAR(n)); else a=0; if(cdr_is_node(n)) b=find_return_type(CDR(n)); else b=0; if(a) { if(b) { if (a != b) { struct pike_type *res = or_pike_types(a, b, 1); free_type(a); free_type(b); return res; } free_type(b); } return a; } return b; } int check_tailrecursion(void) { int e; if(debug_options & NO_TAILRECURSION) return 0; for(e=0;e<Pike_compiler->compiler_frame->max_number_of_locals;e++) { if(!pike_type_allow_premature_toss( Pike_compiler->compiler_frame->variable[e].type)) return 0; } return 1; } #define NODES 128 /* 256 */ #undef BLOCK_ALLOC_NEXT #define BLOCK_ALLOC_NEXT u.node.a BLOCK_ALLOC(node_s, NODES) #undef BLOCK_ALLOC_NEXT #define BLOCK_ALLOC_NEXT next #ifdef SHARED_NODES struct node_hash_table node_hash; static INLINE size_t hash_node(node *n) { size_t ret_; DO_HASHMEM(ret_, (unsigned char *)&(n->token), sizeof(node) - OFFSETOF(node_s, token), sizeof(node)); return ret_; } static void add_node(node *n) { size_t hval = (n->hash % node_hash.size); #ifdef PIKE_DEBUG node *probe = node_hash.table[hval]; while(probe) { if (probe == n) { fprintf(stderr, "add_node(%p == %p): Node already added!\n", (void *)probe, (void *)n); fprintf( stderr, " %ld <-> %ld\n", DO_NOT_WARN((long)hval), DO_NOT_WARN((long)(n->hash % node_hash.size)) ); probe = node_hash.table[hval]; while( probe ) { fprintf(stderr, " %p\n", (void *)probe); probe = probe->next; } fatal( "Node already added!\n" ); } probe = probe->next; } #endif /* PIKE_DEBUG */ n->next = node_hash.table[hval]; node_hash.table[hval] = n; } static void sub_node(node *n) { node *prior; #ifdef PIKE_DEBUG if (!node_hash.size) { return; } #endif /* PIKE_DEBUG */ prior = node_hash.table[n->hash % node_hash.size]; if (!prior) { return; } if (prior == n) { node_hash.table[n->hash % node_hash.size] = n->next; } else { while(prior && (prior->next != n)) { prior = prior->next; } if (!prior) { return; } prior->next = n->next; } n->next = NULL; } static node *freeze_node(node *orig) { size_t hash; node *n; int found = 0; if (orig->tree_info & OPT_NOT_SHARED) { /* No need to have this node in the hash-table. */ /* add_node(orig); */ return orig; } /* free_node() wants a correct hash */ orig->hash = hash = hash_node(orig); /* Mark this node as a possible duplicate */ orig->node_info |= OPT_DEFROSTED; /* Make sure we don't find ourselves */ /* sub_node(orig); */ n = node_hash.table[hash % node_hash.size]; while (n) { if (n == orig) { found = 1; if (!(n = n->next)) { break; } } if ((n->hash == hash) && !MEMCMP(&(n->token), &(orig->token), sizeof(node) - OFFSETOF(node_s, token))) { if (orig->type && (orig->type != n->type)) { if (n->type) { /* Use the new type if it's stricter. */ if (pike_types_le(orig->type, n->type)) { free_type(n->type); copy_pike_type(n->type, orig->type); } } else { /* This probably doesn't happen, but... */ copy_pike_type(n->type, orig->type); } } if (!found) { node *scan = n; while(scan->next) { if (scan->next == orig) { scan->next = orig->next; break; } scan = scan->next; } } else { /* FIXME: sub_node() recalculates the hash index. * We might get better performance by using the one we already have. */ sub_node(orig); } free_node(dmalloc_touch(node *, orig)); n->refs++; return check_node_hash(dmalloc_touch(node *, n)); } n = n->next; } orig->node_info &= ~OPT_DEFROSTED; if (!found) { add_node(dmalloc_touch(node *, orig)); } check_tree(orig,0); return check_node_hash(orig); } #else /* !SHARED_NODES */ #ifdef PIKE_DEBUG static node *freeze_node(node *orig) { check_tree(orig, 0); return orig; } #else /* !PIKE_DEBUG */ #define freeze_node(X) (X) #endif /* PIKE_DEBUG */ #endif /* SHARED_NODES */ void free_all_nodes(void) { if(!Pike_compiler->compiler_frame) { node *tmp; struct node_s_block *tmp2; int e=0; #ifndef PIKE_DEBUG if(cumulative_parse_error) { #endif for(tmp2=node_s_blocks;tmp2;tmp2=tmp2->next) e+=NODES; for(tmp=free_node_ss;tmp;tmp=_CAR(tmp)) e--; if(e) { int e2=e; for(tmp2=node_s_blocks;tmp2;tmp2=tmp2->next) { for(e=0;e<NODES;e++) { for(tmp=free_node_ss;tmp;tmp=_CAR(tmp)) if(tmp==tmp2->x+e) break; if(!tmp) { tmp=tmp2->x+e; #ifdef PIKE_DEBUG if(!cumulative_parse_error) { fprintf(stderr,"Free node at %p, (%s:%d) (token=%d).\n", (void *)tmp, tmp->current_file->str, tmp->line_number, tmp->token); debug_malloc_dump_references(tmp,0,2,0); if(tmp->token==F_CONSTANT) print_tree(tmp); } /* else */ #endif { #ifdef SHARED_NODES /* Force the hashtable entry to be cleared. */ tmp->next = NULL; sub_node(tmp); #endif /* SHARED_NODES */ /* Free the node and be happy */ /* Make sure we don't free any nodes twice */ if(car_is_node(tmp)) _CAR(tmp)=0; if(cdr_is_node(tmp)) _CDR(tmp)=0; #ifdef SHARED_NODES if (!(tmp->tree_info & OPT_NOT_SHARED)) { tmp->hash = hash_node(tmp); } #ifdef PIKE_DEBUG if (l_flag > 3) { fprintf(stderr, "Freeing node that had %d refs.\n", tmp->refs); } #endif /* PIKE_DEBUG */ /* Force the node to be freed. */ tmp->refs = 1; #endif /* SHARED_NODES */ debug_malloc_touch(tmp->type); free_node(tmp); } } } } #if defined(PIKE_DEBUG) if(!cumulative_parse_error) fatal("Failed to free %d nodes when compiling!\n",e2); #endif } #ifndef PIKE_DEBUG } #endif free_all_node_s_blocks(); cumulative_parse_error=0; #ifdef SHARED_NODES /* MEMSET(node_hash.table, 0, sizeof(node *) * node_hash.size); */ #endif /* SHARED_NODES */ } } void debug_free_node(node *n) { if(!n) return; #ifdef SHARED_NODES if (--n->refs) { #ifdef PIKE_DEBUG if(l_flag>9) print_tree(n); if (!(n->tree_info & (OPT_NOT_SHARED | OPT_DEFROSTED))) { size_t hash; if ((hash = hash_node(n)) != n->hash) { fprintf(stderr, "Hash-value is bad 0x%08lx != 0x%08lx\n", DO_NOT_WARN((unsigned long)hash), DO_NOT_WARN((unsigned long)n->hash)); print_tree(n); fatal("token:%d, car:%p cdr:%p file:%s line:%d\n", n->token, _CAR(n), _CDR(n), n->current_file->str, n->line_number); } } #endif /* PIKE_DEBUG */ return; } #endif /* SHARED_NODES */ n->parent = NULL; do { #ifdef PIKE_DEBUG if(l_flag>9) print_tree(n); #ifdef SHARED_NODES if (!(n->tree_info & (OPT_NOT_SHARED | OPT_DEFROSTED))) { size_t hash; if ((hash = hash_node(n)) != n->hash) { fprintf(stderr, "Hash-value is bad 0x%08lx != 0x%08lx\n", DO_NOT_WARN((unsigned long)hash), DO_NOT_WARN((unsigned long)n->hash)); print_tree(n); fatal("token:%d, car:%p cdr:%p file:%s line:%d\n", n->token, _CAR(n), _CDR(n), n->current_file->str, n->line_number); } } #endif /* SHARED_NODES */ #endif /* PIKE_DEBUG */ debug_malloc_touch(n); #ifdef SHARED_NODES #ifdef PIKE_DEBUG if (n->refs) { fatal("Node with refs left about to be killed: %8p\n", n); } #endif /* PIKE_DEBUG */ sub_node(dmalloc_touch(node *, n)); #endif /* SHARED_NODES */ switch(n->token) { case USHRT_MAX: fatal("Freeing node again!\n"); break; case F_CONSTANT: free_svalue(&(n->u.sval)); break; } if (car_is_node(n)) { /* Free CAR */ #ifdef SHARED_NODES if (--_CAR(n)->refs) { _CAR(n) = NULL; } else { #endif /* SHARED_NODES */ _CAR(n)->parent = n; n = _CAR(n); _CAR(n->parent) = NULL; continue; #ifdef SHARED_NODES } #endif /* SHARED_NODES */ } if (cdr_is_node(n)) { /* Free CDR */ #ifdef SHARED_NODES if (--_CDR(n)->refs) { _CDR(n) = NULL; } else { #endif /* SHARED_NODES */ _CDR(n)->parent = n; n = _CDR(n); _CDR(n->parent) = NULL; continue; #ifdef SHARED_NODES } #endif /* SHARED_NODES */ } backtrack: while (n->parent && !cdr_is_node(n->parent)) { /* Kill the node and backtrack */ node *dead = n; #if defined(SHARED_NODES) && defined(PIKE_DEBUG) if (dead->refs) { fatal("Killed node %p still has refs: %d\n", dead, dead->refs); } #endif /* SHARED_NODES && PIKE_DEBUG */ n = n->parent; if(dead->type) free_type(dead->type); if(dead->name) free_string(dead->name); #ifdef PIKE_DEBUG if(dead->current_file) free_string(dead->current_file); #endif dead->token=USHRT_MAX; really_free_node_s(dead); } if (n->parent && cdr_is_node(n->parent)) { /* Kill node and jump to the sibling. */ node *dead = n; #if defined(SHARED_NODES) && defined(PIKE_DEBUG) if (dead->refs) { fatal("Killed node %p still has refs: %d\n", dead, dead->refs); } #endif /* SHARED_NODES && PIKE_DEBUG */ n = n->parent; if(dead->type) free_type(dead->type); if(dead->name) free_string(dead->name); #ifdef PIKE_DEBUG if(dead->current_file) free_string(dead->current_file); #endif dead->token=USHRT_MAX; really_free_node_s(dead); #ifdef SHARED_NODES if (--_CDR(n)->refs) { _CDR(n) = NULL; goto backtrack; } else { #endif /* SHARED_NODES */ _CDR(n)->parent = n; n = _CDR(n); _CDR(n->parent) = NULL; continue; #ifdef SHARED_NODES } #endif /* SHARED_NODES */ } /* Kill root node. */ #if defined(SHARED_NODES) && defined(PIKE_DEBUG) if (n->refs) { fatal("Killed node %p still has refs: %d\n", n, n->refs); } #endif /* SHARE_NODES && PIKE_DEBUG */ if(n->type) free_type(n->type); if(n->name) free_string(n->name); #ifdef PIKE_DEBUG if(n->current_file) free_string(n->current_file); #endif n->token=USHRT_MAX; really_free_node_s(n); break; } while (n->parent); } node *debug_check_node_hash(node *n) { #if defined(PIKE_DEBUG) && defined(SHARED_NODES) if (n && !(n->tree_info & (OPT_DEFROSTED|OPT_NOT_SHARED)) && (n->hash != hash_node(n))) { fprintf(stderr,"Bad node hash at %p, (%s:%d) (token=%d).\n", (void *)n, n->current_file->str, n->line_number, n->token); debug_malloc_dump_references(n,0,0,0); print_tree(n); fatal("Bad node hash!\n"); } #endif /* PIKE_DEBUG && SHARED_NODES */ return n; } /* here starts routines to make nodes */ static node *debug_mkemptynode(void) { node *res=alloc_node_s(); #ifdef SHARED_NODES MEMSET(res, 0, sizeof(node)); res->hash = 0; res->refs = 1; #endif /* SHARED_NODES */ res->token=0; res->line_number=lex.current_line; #ifdef PIKE_DEBUG copy_shared_string(res->current_file, lex.current_file); #endif res->type=0; res->name=0; res->node_info=0; res->tree_info=0; res->parent=0; return res; } #define mkemptynode() dmalloc_touch(node *, debug_mkemptynode()) node *debug_mknode(short token, node *a, node *b) { node *res; #if defined(PIKE_DEBUG) && !defined(SHARED_NODES) if(b && a==b) fatal("mknode: a and be are the same!\n"); if ((token == F_CAST) || (token == F_SOFT_CAST)) fatal("Attempt to create a cast-node with mknode()!\n"); #endif check_tree(a,0); check_tree(b,0); res = mkemptynode(); _CAR(res) = dmalloc_touch(node *, a); _CDR(res) = dmalloc_touch(node *, b); res->node_info = 0; res->tree_info = 0; if(a) { a->parent = res; } if(b) { b->parent = res; } res->token = token; res->type = 0; switch(token) { case F_CATCH: res->node_info |= OPT_SIDE_EFFECT; if (a) { res->tree_info |= a->tree_info & ~OPT_BREAK; } break; case F_APPLY: { unsigned INT16 opt_flags = OPT_SIDE_EFFECT | OPT_EXTERNAL_DEPEND; struct identifier *i = NULL; if (a) { switch(a->token) { case F_CONSTANT: switch(a->u.sval.type) { case T_FUNCTION: if (a->u.sval.subtype == FUNCTION_BUILTIN) { opt_flags = a->u.sval.u.efun->flags; } else if (a->u.sval.u.object->prog) { i = ID_FROM_INT(a->u.sval.u.object->prog, a->u.sval.subtype); } else { yyerror("Calling function in destructed module."); } break; case T_PROGRAM: if(a->u.sval.u.program->flags & PROGRAM_CONSTANT) opt_flags=0; break; } break; case F_EXTERNAL: { struct program_state *state = Pike_compiler; int program_id = a->u.integer.a; while (state && (state->new_program->id != program_id)) { state = state->previous; } if (state) { i = ID_FROM_INT(state->new_program, a->u.integer.b); } else { yyerror("Parent has left."); } } break; case F_LOCAL: /* FIXME: Should lookup functions in the local scope. */ default: res->tree_info |= a->tree_info; } if (i && IDENTIFIER_IS_FUNCTION(i->identifier_flags)) { res->node_info |= i->opt_flags; } else { res->node_info |= opt_flags; } } else { res->node_info |= opt_flags; } res->node_info |= OPT_APPLY; if(b) res->tree_info |= b->tree_info; } break; case F_POP_VALUE: copy_pike_type(res->type, void_type_string); if(a) res->tree_info |= a->tree_info; if(b) res->tree_info |= b->tree_info; break; case F_MAGIC_SET_INDEX: res->node_info |= OPT_ASSIGNMENT; /* FALL_THROUGH */ case F_MAGIC_INDEX: { int e; struct program_state *state = Pike_compiler; res->node_info |= OPT_EXTERNAL_DEPEND; for(e=0;e<b->u.sval.u.integer;e++) { state->new_program->flags |= PROGRAM_USES_PARENT | PROGRAM_NEEDS_PARENT; state=state->previous; } break; } case F_UNDEFINED: res->node_info |= OPT_EXTERNAL_DEPEND | OPT_SIDE_EFFECT; break; case F_RETURN: res->node_info |= OPT_RETURN; break; case F_BREAK: res->node_info |= OPT_BREAK; break; case F_CONTINUE: res->node_info |= OPT_CONTINUE; break; case F_DEFAULT: case F_CASE: res->node_info |= OPT_CASE; break; case F_INC_LOOP: case F_INC_NEQ_LOOP: case F_DEC_LOOP: case F_DEC_NEQ_LOOP: res->node_info |= OPT_ASSIGNMENT; if (a) { res->tree_info |= a->tree_info; } if (b) { res->tree_info |= (b->tree_info & ~(OPT_BREAK|OPT_CONTINUE)); } break; case F_SSCANF: if(!b || count_args(b) == 0) break; res->node_info |= OPT_ASSIGNMENT; break; case F_ASSIGN: case F_MOD_EQ: case F_AND_EQ: case F_MULT_EQ: case F_ADD_EQ: case F_SUB_EQ: case F_DIV_EQ: case F_LSH_EQ: case F_RSH_EQ: case F_XOR_EQ: case F_OR_EQ: res->node_info |= OPT_ASSIGNMENT; if (a) { res->tree_info |= a->tree_info; } if (b) { res->tree_info |= b->tree_info; } break; case F_INC: case F_DEC: case F_POST_INC: case F_POST_DEC: res->node_info |= OPT_ASSIGNMENT; if (a) { res->tree_info |= a->tree_info; } break; default: if(a) res->tree_info |= a->tree_info; if(b) res->tree_info |= b->tree_info; } /* We try to optimize most things, but argument lists are hard... */ if((token != F_ARG_LIST) && (a || b)) res->node_info |= OPT_TRY_OPTIMIZE; res->tree_info |= res->node_info; #ifdef SHARED_NODES /* No need to freeze the node if it can't be shared. */ if (!(res->tree_info & OPT_NOT_SHARED)) { node *res2 = freeze_node(res); if (res2 != res) { return dmalloc_touch(node *, res2); } } #endif /* SHARED_NODES */ #ifdef PIKE_DEBUG if(d_flag > 3) verify_shared_strings_tables(); #endif check_tree(res,0); #if 0 if(!Pike_compiler->num_parse_error && Pike_compiler->compiler_pass==2 && (res->node_info & OPT_TRY_OPTIMIZE)) { optimize(res); check_tree(res,0); } #endif #ifdef PIKE_DEBUG if(d_flag > 3) verify_shared_strings_tables(); #endif return res; } node *debug_mkstrnode(struct pike_string *str) { node *res = mkemptynode(); res->token = F_CONSTANT; copy_pike_type(res->type, string_type_string); res->node_info = 0; res->u.sval.type = T_STRING; #ifdef __CHECKER__ res->u.sval.subtype = 0; #endif copy_shared_string(res->u.sval.u.string, str); return freeze_node(res); } node *debug_mkintnode(int nr) { node *res = mkemptynode(); res->token = F_CONSTANT; res->node_info = 0; res->u.sval.type = T_INT; res->u.sval.subtype = NUMBER_NUMBER; res->u.sval.u.integer = nr; res->type=get_type_of_svalue( & res->u.sval); return freeze_node(res); } node *debug_mknewintnode(int nr) { node *res = mkemptynode(); res->token = F_CONSTANT; res->node_info = OPT_NOT_SHARED; res->tree_info = OPT_NOT_SHARED; res->u.sval.type = T_INT; res->u.sval.subtype = NUMBER_NUMBER; res->u.sval.u.integer = nr; res->type=get_type_of_svalue( & res->u.sval); #ifdef SHARED_NODES res->refs = 1; /* res->hash = hash_node(res); */ #endif /* SHARED_NODES */ return res; } node *debug_mkfloatnode(FLOAT_TYPE foo) { node *res = mkemptynode(); res->token = F_CONSTANT; copy_pike_type(res->type, float_type_string); res->u.sval.type = T_FLOAT; #ifdef __CHECKER__ res->u.sval.subtype = 0; #endif res->u.sval.u.float_number = foo; return freeze_node(res); } node *debug_mkprgnode(struct program *p) { struct svalue s; s.u.program=p; s.type = T_PROGRAM; #ifdef __CHECKER__ s.subtype = 0; #endif return mkconstantsvaluenode(&s); } node *debug_mkapplynode(node *func,node *args) { return mknode(F_APPLY, func, args); } node *debug_mkefuncallnode(char *function, node *args) { struct pike_string *name; node *n; name = findstring(function); if(!name || !(n=find_module_identifier(name,0))) { my_yyerror("Internally used efun undefined: %s",function); return mkintnode(0); } n = mkapplynode(n, args); return n; } node *debug_mkopernode(char *oper_id, node *arg1, node *arg2) { if(arg1 && arg2) arg1=mknode(F_ARG_LIST,arg1,arg2); return mkefuncallnode(oper_id, arg1); } node *debug_mklocalnode(int var, int depth) { struct compiler_frame *f; int e; node *res = mkemptynode(); res->token = F_LOCAL; f=Pike_compiler->compiler_frame; for(e=0;e<depth;e++) f=f->previous; copy_pike_type(res->type, f->variable[var].type); res->node_info = OPT_NOT_CONST | OPT_NOT_SHARED; res->tree_info = res->node_info; #ifdef __CHECKER__ _CDR(res) = 0; #endif res->u.integer.a = var; res->u.integer.b = depth; #ifdef SHARED_NODES /* FIXME: Not common-subexpression optimized. * Node would need to contain a ref to the current function, * and to the current program. */ res->hash = hash_node(res); /* return freeze_node(res); */ #endif /* SHARED_NODES */ return res; } node *debug_mkidentifiernode(int i) { #if 1 node *res = mkexternalnode(Pike_compiler->new_program, i); check_tree(res,0); return res; #else node *res = mkemptynode(); res->token = F_IDENTIFIER; copy_shared_string(res->type, ID_FROM_INT(Pike_compiler->new_program, i)->type); /* FIXME */ if(IDENTIFIER_IS_CONSTANT(ID_FROM_INT(Pike_compiler->new_program, i)->identifier_flags)) { res->node_info = OPT_EXTERNAL_DEPEND; }else{ res->node_info = OPT_NOT_CONST; } res->tree_info=res->node_info; #ifdef __CHECKER__ _CDR(res) = 0; #endif res->u.id.number = i; #ifdef SHARED_NODES res->u.id.prog = Pike_compiler->new_program; #endif /* SHARED_NODES */ res = freeze_node(res); check_tree(res,0); return res; #endif } node *debug_mktrampolinenode(int i) { node *res = mkemptynode(); res->token = F_TRAMPOLINE; copy_pike_type(res->type, ID_FROM_INT(Pike_compiler->new_program, i)->type); /* FIXME */ if(IDENTIFIER_IS_CONSTANT(ID_FROM_INT(Pike_compiler->new_program, i)->identifier_flags)) { res->node_info = OPT_EXTERNAL_DEPEND; }else{ res->node_info = OPT_NOT_CONST; } res->tree_info=res->node_info; #ifdef __CHECKER__ _CDR(res) = 0; #endif res->u.id.number = i; #ifdef SHARED_NODES res->u.id.prog = Pike_compiler->new_program; #endif /* SHARED_NODES */ res = freeze_node(res); check_tree(res,0); return res; } node *debug_mkexternalnode(struct program *parent_prog, int i) { struct program_state *state; node *res = mkemptynode(); struct identifier *id; res->token = F_EXTERNAL; id = ID_FROM_INT(parent_prog, i); #ifdef PIKE_DEBUG if(d_flag) { check_type_string(id->type); check_string(id->name); } #endif copy_pike_type(res->type, id->type); /* FIXME */ if(IDENTIFIER_IS_CONSTANT(id->identifier_flags)) { res->node_info = OPT_EXTERNAL_DEPEND; }else{ res->node_info = OPT_NOT_CONST; } res->tree_info = res->node_info; #ifdef __CHECKER__ _CDR(res) = 0; #endif res->u.integer.a = parent_prog->id; res->u.integer.b = i; /* Bzot-i-zot */ state = Pike_compiler; while(parent_prog != state->new_program) { state->new_program->flags |= PROGRAM_USES_PARENT | PROGRAM_NEEDS_PARENT; state=state->previous; } res=freeze_node(res); #ifdef PIKE_DEBUG /* FIXME: This test crashes on valid code because the type of the * identifier can change in pass 2 -Hubbe */ if(d_flag && id->type != res->type) { printf("Type of external node is not matching it's identifier.\nid->type: "); simple_describe_type(id->type); printf("\nres->type : "); simple_describe_type(res->type); printf("\n"); fatal("Type of external node is not matching it's identifier.\n"); } #endif return res; } node *debug_mkcastnode(struct pike_type *type, node *n) { node *res; if(!n) return 0; #ifdef PIKE_DEBUG if (!type) { fatal("Casting to no type!\n"); } #endif /* PIKE_DEBUG */ if (type == void_type_string) return mknode(F_POP_VALUE, n, 0); if(type==n->type) return n; res = mkemptynode(); res->token = F_CAST; copy_pike_type(res->type, type); if(match_types(object_type_string, type) || match_types(program_type_string, type)) res->node_info |= OPT_SIDE_EFFECT; res->tree_info |= n->tree_info; _CAR(res) = n; _CDR(res) = mktypenode(type); n->parent = res; return freeze_node(res); } node *debug_mksoftcastnode(struct pike_type *type, node *n) { node *res; if(!n) return 0; #ifdef PIKE_DEBUG if (!type) { fatal("Soft cast to no type!\n"); } #endif /* PIKE_DEBUG */ if (Pike_compiler->compiler_pass == 2) { if (type == void_type_string) { yywarning("Soft cast to void."); return mknode(F_POP_VALUE, n, 0); } if(type==n->type) { struct pike_string *t1 = describe_type(type); yywarning("Soft cast to %s is a noop.", t1->str); free_string(t1); return n; } if (n->type) { if (!check_soft_cast(type, n->type)) { struct pike_string *t1 = describe_type(type); struct pike_string *t2 = describe_type(n->type); yywarning("Soft cast to %s isn't a restriction of %s.", t1->str, t2->str); free_string(t2); free_string(t1); } /* FIXME: check_soft_cast() is weaker than pike_types_le() * The resulting type should probably be the and between the old * and the new type. */ } } res = mkemptynode(); res->token = F_SOFT_CAST; copy_pike_type(res->type, type); res->tree_info |= n->tree_info; _CAR(res) = n; _CDR(res) = mktypenode(type); n->parent = res; return freeze_node(res); } void resolv_constant(node *n) { struct identifier *i; struct program *p; INT32 numid; check_tree(n,0); if(!n) { push_int(0); }else{ switch(n->token) { case F_CONSTANT: push_svalue(& n->u.sval); return; case F_EXTERNAL: { struct program_state *state = Pike_compiler; while (state && (state->new_program->id != n->u.integer.a)) { state = state->previous; } if(!state) { yyerror("Failed to resolv external constant"); push_int(0); return; } p = state->new_program; numid=n->u.integer.b; } break; case F_IDENTIFIER: p=Pike_compiler->new_program; numid=n->u.id.number; break; case F_LOCAL: /* FIXME: Ought to have the name of the identifier in the message. */ yyerror("Expected constant, got local variable"); push_int(0); return; case F_GLOBAL: /* FIXME: Ought to have the name of the identifier in the message. */ yyerror("Expected constant, got global variable"); push_int(0); return; case F_UNDEFINED: if(Pike_compiler->compiler_pass==2) { /* FIXME: Ought to have the name of the identifier in the message. */ yyerror("Expected constant, got undefined identifier"); } push_int(0); return; default: { char fnord[1000]; if(is_const(n)) { ptrdiff_t args=eval_low(n); if(args==1) return; if(args!=-1) { if(!args) { yyerror("Expected constant, got void expression"); }else{ yyerror("Possible internal error!!!"); pop_n_elems(DO_NOT_WARN(args-1)); return; } } } sprintf(fnord,"Expected constant, got something else (%d)",n->token); yyerror(fnord); push_int(0); return; } } i=ID_FROM_INT(p, numid); /* Warning: * This code doesn't produce function pointers for class constants, * which can be harmful... * /Hubbe */ if(IDENTIFIER_IS_CONSTANT(i->identifier_flags)) { if(i->func.offset != -1) { push_svalue(&PROG_FROM_INT(p, numid)->constants[i->func.offset].sval); }else{ if(Pike_compiler->compiler_pass!=1) yyerror("Constant is not defined yet."); push_int(0); } }else{ my_yyerror("Identifier '%s' is not a constant", i->name->str); push_int(0); } } } /* Leaves a function or object on the stack */ void resolv_class(node *n) { check_tree(n,0); resolv_constant(n); switch(Pike_sp[-1].type) { case T_OBJECT: if(!Pike_sp[-1].u.object->prog) { pop_stack(); push_int(0); }else{ f_object_program(1); } break; default: if (Pike_compiler->compiler_pass!=1) yyerror("Illegal program identifier"); pop_stack(); push_int(0); case T_FUNCTION: case T_PROGRAM: break; } } /* This one always leaves a program if possible */ void resolv_program(node *n) { check_tree(n,0); resolv_class(n); switch(Pike_sp[-1].type) { case T_FUNCTION: if(program_from_function(Pike_sp-1)) break; default: if (Pike_compiler->compiler_pass!=1) yyerror("Illegal program identifier"); pop_stack(); push_int(0); case T_PROGRAM: break; } } node *recursive_add_call_arg(node *n, node *arg) { node *tmp; switch(n->token) { case F_ASSIGN: case F_INC: case F_DEC: case F_POP_VALUE: tmp=recursive_add_call_arg(CAR(n), arg); #ifdef SHARED_NODES if(tmp != n) { n=defrost_node(n); _CAR(n)=tmp; n=freeze_node(n); } #else _CAR(n)=tmp; #endif break; case F_APPLY: if(CAR(n)->token == F_CONSTANT && CAR(n)->u.sval.type == T_FUNCTION && CAR(n)->u.sval.subtype == FUNCTION_BUILTIN && CAR(n)->u.sval.u.efun->name && CAR(n)->u.sval.u.efun->name->str[0]=='`') { /* FALL THROUGH */ }else{ tmp=mknode(F_ARG_LIST, CDR(n), arg); #ifdef SHARED_NODES n=defrost_node(n); _CDR(n)=tmp; n=freeze_node(n); #else _CDR(n)=tmp; #endif break; } case F_OR_EQ: case F_XOR_EQ: case F_LSH_EQ: case F_RSH_EQ: case F_ADD_EQ: case F_SUB_EQ: case F_MULT_EQ: case F_MOD_EQ: case F_DIV_EQ: case F_ARG_LIST: case F_LOR: case F_LAND: case F_CAST: case F_SOFT_CAST: tmp=recursive_add_call_arg(CDR(n), arg); #ifdef SHARED_NODES { n=defrost_node(n); _CDR(n)=tmp; n=freeze_node(n); } #else _CDR(n)=tmp; #endif break; default: yyerror("Syntax error in implicit lambda."); free_node(arg); break; } return n; } node *index_node(node *n, char *node_name, struct pike_string *id) { node *ret; JMP_BUF tmp; check_tree(n,0); if(SETJMP(tmp)) { struct svalue s; assign_svalue_no_free(&s, &throw_value); call_handle_error(); if (node_name) { my_yyerror("Couldn't index module '%s'.", node_name); } else { yyerror("Couldn't index module."); } if ((s.type == T_ARRAY) && s.u.array->size && (s.u.array->item[0].type == T_STRING)) { /* Old-style backtrace */ my_yyerror("Error: '%s'.", s.u.array->item[0].u.string->str); } else if (s.type == T_OBJECT) { struct generic_error_struct *ge; if ((ge = (struct generic_error_struct *) get_storage(s.u.object, generic_error_program))) { my_yyerror("Error: '%s'.", ge->desc->str); } } free_svalue(&s); }else{ resolv_constant(n); switch(Pike_sp[-1].type) { case T_INT: if(!Pike_compiler->num_parse_error) { if (node_name) { my_yyerror("Failed to index module '%s' with '%s' " "(module doesn't exist?)", node_name, id->str); } else { my_yyerror("Failed to index module with '%s' " "(module doesn't exist?)", id->str); } } break; case T_FLOAT: case T_STRING: case T_ARRAY: if (node_name) { my_yyerror("Failed to index module '%s' (Not a module?)", node_name); } else { yyerror("Failed to index module (Not a module?)"); } pop_stack(); push_int(0); break; default: { ptrdiff_t c; DECLARE_CYCLIC(); c = (ptrdiff_t)BEGIN_CYCLIC(Pike_sp[-1].u.refs, id); if(c>1) { my_yyerror("Recursive module dependency in '%s'.",id->str); pop_stack(); push_int(0); }else{ SET_CYCLIC_RET(c+1); ref_push_string(id); { struct svalue *save_sp = Pike_sp-2; JMP_BUF recovery; if (SETJMP(recovery)) { /* f_index() threw an error! * * FIXME: Report the error thrown. */ free_svalue(&throw_value); throw_value.type = T_INT; if (Pike_sp > save_sp) { pop_n_elems(Pike_sp - save_sp); } else if (Pike_sp != save_sp) { fatal("f_index() munged stack!\n"); } push_int(0); Pike_sp[-1].subtype = NUMBER_UNDEFINED; } else { f_index(2); } UNSETJMP(recovery); } if(Pike_sp[-1].type == T_INT && !Pike_sp[-1].u.integer && Pike_sp[-1].subtype==NUMBER_UNDEFINED) { if (node_name) { my_yyerror("Index '%s' not present in module '%s'.", id->str, node_name); } else { my_yyerror("Index '%s' not present in module.", id->str); } } } END_CYCLIC(); } } } UNSETJMP(tmp); ret=mkconstantsvaluenode(Pike_sp-1); pop_stack(); return ret; } /* FIXME: Ought to use parent pointer to avoid recursion. */ int node_is_eq(node *a,node *b) { check_tree(a,0); check_tree(b,0); if(a == b) return 1; if(!a || !b) return 0; if(a->token != b->token) return 0; fatal_check_c_stack(16384); switch(a->token) { case F_EXTERNAL: case F_LOCAL: return a->u.integer.a == b->u.integer.a && a->u.integer.b == b->u.integer.b; case F_IDENTIFIER: case F_TRAMPOLINE: /* FIXME, the context has to be the same! */ return a->u.id.number == b->u.id.number; case F_CAST: case F_SOFT_CAST: return a->type == b->type && node_is_eq(CAR(a), CAR(b)); case F_CONSTANT: return is_equal(&(a->u.sval), &(b->u.sval)); default: if( a->type != b->type ) return 0; if(car_is_node(a) && !node_is_eq(CAR(a), CAR(b))) return 0; if(cdr_is_node(a) && !node_is_eq(CDR(a), CDR(b))) return 0; return 1; } } node *debug_mktypenode(struct pike_type *t) { node *res = mkemptynode(); res->token = F_CONSTANT; copy_pike_type(res->u.sval.u.type, t); res->u.sval.type = T_TYPE; /* FIXME: Should be type(val) */ copy_pike_type(res->type, type_type_string); return freeze_node(res); } node *low_mkconstantsvaluenode(struct svalue *s) { node *res = mkemptynode(); res->token = F_CONSTANT; assign_svalue_no_free(& res->u.sval, s); if(s->type == T_OBJECT || (s->type==T_FUNCTION && s->subtype!=FUNCTION_BUILTIN)) { if(!(s->u.object->prog && (s->u.object->prog->flags & PROGRAM_CONSTANT))) res->node_info|=OPT_EXTERNAL_DEPEND; } res->type = get_type_of_svalue(s); return res; } node *debug_mkconstantsvaluenode(struct svalue *s) { return freeze_node(low_mkconstantsvaluenode(s)); } node *debug_mkliteralsvaluenode(struct svalue *s) { node *res = low_mkconstantsvaluenode(s); if(s->type!=T_STRING && s->type!=T_INT && s->type!=T_FLOAT) res->node_info|=OPT_EXTERNAL_DEPEND; return freeze_node(res); } node *debug_mksvaluenode(struct svalue *s) { switch(s->type) { case T_ARRAY: return make_node_from_array(s->u.array); case T_MULTISET: return make_node_from_multiset(s->u.multiset); case T_MAPPING: return make_node_from_mapping(s->u.mapping); case T_OBJECT: if(s->u.object == Pike_compiler->fake_object) { return mkefuncallnode("this_object", 0); } if(s->u.object->next == s->u.object) { int x=0; node *n=mkefuncallnode("this_object", 0); #ifndef PARENT_INFO struct object *o; for(o=Pike_compiler->fake_object;o!=s->u.object;o=o->parent) { n=mkefuncallnode("function_object", mkefuncallnode("object_program",n)); } #else struct program_state *state=Pike_compiler;; for(;state->fake_object!=s->u.object;state=state->previous) { state->new_program->flags |= PROGRAM_USES_PARENT | PROGRAM_NEEDS_PARENT; n=mkefuncallnode("function_object", mkefuncallnode("object_program",n)); } #endif return n; } break; case T_FUNCTION: { if(s->subtype != FUNCTION_BUILTIN) { if(s->u.object == Pike_compiler->fake_object) return mkidentifiernode(s->subtype); if(s->u.object->next == s->u.object) { return mkexternalnode(s->u.object->prog, s->subtype); } /* yyerror("Non-constant function pointer! (should not happen!)"); */ } } } return mkconstantsvaluenode(s); } /* these routines operates on parsetrees and are mostly used by the * optimizer */ /* FIXME: Ought to use parent pointer to avoid recursion. * In the SHARED_NODES case there's no need of course. */ node *copy_node(node *n) { node *b; debug_malloc_touch(n); debug_malloc_touch(n->type); debug_malloc_touch(n->u.node.a); debug_malloc_touch(n->u.node.b); check_tree(n,0); if(!n) return n; switch(n->token) { case F_LOCAL: case F_IDENTIFIER: case F_TRAMPOLINE: b=mknewintnode(0); if(b->type) free_type(b->type); *b=*n; copy_pike_type(b->type, n->type); return b; default: #ifdef SHARED_NODES n->refs++; return n; #else /* !SHARED_NODES */ fatal_check_c_stack(16384); switch((car_is_node(n) << 1) | cdr_is_node(n)) { default: fatal("fooo?\n"); case 3: b=mknode(n->token, copy_node(CAR(n)), copy_node(CDR(n))); break; case 2: b=mknode(n->token, copy_node(CAR(n)), CDR(n)); break; case 1: b=mknode(n->token, CAR(n), copy_node(CDR(n))); break; case 0: b=mknode(n->token, CAR(n), CDR(n)); } if(n->type) copy_pike_type(b->type, n->type); else b->type=0; break; case F_CAST: b=mkcastnode(n->type,copy_node(CAR(n))); break; case F_SOFT_CAST: b=mksoftcastnode(n->type,copy_node(CAR(n))); break; case F_CONSTANT: b=mkconstantsvaluenode(&(n->u.sval)); break; #endif /* SHARED_NODES */ } if(n->name) { if(b->name) free_string(b->name); add_ref(b->name=n->name); } /* FIXME: Should b->name be kept if n->name is NULL? * /grubba 1999-09-22 */ b->line_number = n->line_number; b->node_info = n->node_info; b->tree_info = n->tree_info; return b; } /* * Defrost a node, beware that this is not * a recursive function */ #ifdef SHARED_NODES node *defrost_node(node *n) { node *b; debug_malloc_touch(n); debug_malloc_touch(n->type); debug_malloc_touch(n->u.node.a); debug_malloc_touch(n->u.node.b); check_tree(n,0); if(!n) return n; if(n->refs == 1) { sub_node(n); n->node_info |= OPT_DEFROSTED; n->node_info &=~ OPT_OPTIMIZED; n->tree_info &=~ OPT_OPTIMIZED; return n; } switch(n->token) { case F_LOCAL: case F_IDENTIFIER: case F_TRAMPOLINE: b=mknewintnode(0); if(b->type) free_type(b->type); *b=*n; copy_pike_type(b->type, n->type); return b; default: fatal_check_c_stack(16384); b=mkemptynode(); if(car_is_node(n)) _CAR(b)=copy_node(CAR(n)); if(cdr_is_node(n)) _CDR(b)=copy_node(CDR(n)); if(n->type) copy_pike_type(b->type, n->type); else b->type=0; break; case F_CAST: case F_SOFT_CAST: b=mkemptynode(); _CAR(b)=copy_node(CAR(n)); _CDR(b)=copy_node(CDR(n)); if(n->type) copy_pike_type(b->type, n->type); else b->type=0; break; case F_CONSTANT: b=low_mkconstantsvaluenode(&(n->u.sval)); break; } if(n->name) { if(b->name) free_string(b->name); add_ref(b->name=n->name); } /* FIXME: Should b->name be kept if n->name is NULL? * /grubba 1999-09-22 */ b->line_number = n->line_number; b->node_info = n->node_info & ~OPT_OPTIMIZED; b->tree_info = n->tree_info & ~OPT_OPTIMIZED; b->node_info |= OPT_DEFROSTED; free_node(n); return b; } #endif int is_const(node *n) { if(!n) return 1; return !(n->tree_info & (OPT_SIDE_EFFECT | OPT_NOT_CONST | OPT_ASSIGNMENT | OPT_CASE | OPT_CONTINUE | OPT_BREAK | OPT_RETURN )); } int node_is_tossable(node *n) { return !(n->tree_info & (OPT_SIDE_EFFECT | OPT_ASSIGNMENT | OPT_CASE | OPT_CONTINUE | OPT_BREAK | OPT_RETURN )); } /* this one supposes that the value is optimized */ int node_is_true(node *n) { if(!n) return 0; switch(n->token) { case F_CONSTANT: return !IS_ZERO(& n->u.sval); default: return 0; } } /* this one supposes that the value is optimized */ int node_is_false(node *n) { if(!n) return 0; switch(n->token) { case F_CONSTANT: return IS_ZERO(& n->u.sval); default: return 0; } } int node_may_overload(node *n, int lfun) { if(!n) return 0; if(!n->type) return 1; return type_may_overload(n->type, lfun); } /* FIXME: Ought to use parent pointer to avoid recursion. */ node **last_cmd(node **a) { node **n; if(!a || !*a) return (node **)NULL; fatal_check_c_stack(16384); if(((*a)->token == F_CAST) || ((*a)->token == F_SOFT_CAST) || ((*a)->token == F_POP_VALUE)) return last_cmd(&_CAR(*a)); if(((*a)->token != F_ARG_LIST) && ((*a)->token != F_COMMA_EXPR)) return a; if(CDR(*a)) { if(CDR(*a)->token != F_CAST && CDR(*a)->token != F_SOFT_CAST && CDR(*a)->token != F_POP_VALUE && CDR(*a)->token != F_ARG_LIST && CDR(*a)->token != F_COMMA_EXPR) return &_CDR(*a); if((n=last_cmd(&_CDR(*a)))) return n; } if(CAR(*a)) { if(CAR(*a)->token != F_CAST && CAR(*a)->token != F_SOFT_CAST && CAR(*a)->token != F_POP_VALUE && CAR(*a)->token != F_ARG_LIST && CAR(*a)->token != F_COMMA_EXPR) return &_CAR(*a); if((n=last_cmd(&_CAR(*a)))) return n; } return 0; } /* FIXME: Ought to use parent pointer to avoid recursion. */ static node **low_get_arg(node **a,int *nr) { node **n; if (!a[0]) return NULL; if(a[0]->token != F_ARG_LIST) { if(!(*nr)--) return a; else return NULL; } fatal_check_c_stack(16384); if(CAR(*a)) if((n=low_get_arg(&_CAR(*a),nr))) return n; if(CDR(*a)) if((n=low_get_arg(&_CDR(*a),nr))) return n; return 0; } node **my_get_arg(node **a,int n) { return low_get_arg(a,&n); } node **is_call_to(node *n, c_fun f) { switch(n->token) { case F_APPLY: if(CAR(n) && CAR(n)->token == F_CONSTANT && CAR(n)->u.sval.type == T_FUNCTION && CAR(n)->u.sval.subtype == FUNCTION_BUILTIN && CAR(n)->u.sval.u.efun->function == f) return &_CDR(n); } return 0; } /* FIXME: Ought to use parent pointer to avoid recursion. */ static void low_print_tree(node *foo,int needlval) { if(!foo) return; if(l_flag>9) { fprintf(stderr, "/*%x*/",foo->tree_info); } fatal_check_c_stack(16384); switch(l_flag > 99 ? -1 : foo->token) { case USHRT_MAX: fprintf(stderr, "FREED_NODE"); break; case F_LOCAL: if(needlval) fputc('&', stderr); if(foo->u.integer.b) { fprintf(stderr, "$<%ld>%ld",(long)foo->u.integer.b,(long)foo->u.integer.a); }else{ fprintf(stderr, "$%ld",(long)foo->u.integer.a); } break; case '?': fprintf(stderr, "("); low_print_tree(_CAR(foo),0); fprintf(stderr, ")?("); if (_CDR(foo)) { low_print_tree(_CADR(foo),0); fprintf(stderr, "):("); low_print_tree(_CDDR(foo),0); } else { fprintf(stderr, "0:0"); } fprintf(stderr, ")"); break; case F_IDENTIFIER: if(needlval) fputc('&', stderr); if (Pike_compiler->new_program) { fprintf(stderr, "%s",ID_FROM_INT(Pike_compiler->new_program, foo->u.id.number)->name->str); } else { fprintf(stderr, "unknown identifier"); } break; case F_EXTERNAL: if(needlval) fputc('&', stderr); { struct program_state *state = Pike_compiler; char *name = "external"; int program_id = foo->u.integer.a; while(state && (state->new_program->id != program_id)) { state = state->previous; } if (state) { int id_no = foo->u.integer.b; struct identifier *id = ID_FROM_INT(state->new_program, id_no); if (id && id->name) { name = id->name->str; } } fprintf(stderr, "%s", name); } break; case F_TRAMPOLINE: if (Pike_compiler->new_program) { fprintf(stderr, "trampoline<%s>", ID_FROM_INT(Pike_compiler->new_program, foo->u.id.number)->name->str); } else { fprintf(stderr, "trampoline<unknown identifier>"); } break; case F_ASSIGN: low_print_tree(_CDR(foo),1); fprintf(stderr, "="); low_print_tree(_CAR(foo),0); break; case F_POP_VALUE: fprintf(stderr, "{"); low_print_tree(_CAR(foo), 0); fprintf(stderr, "}"); break; case F_CAST: { char *s; init_buf(); my_describe_type(foo->type); s=simple_free_buf(); fprintf(stderr, "(%s){",s); free(s); low_print_tree(_CAR(foo),0); fprintf(stderr, "}"); break; } case F_SOFT_CAST: { char *s; init_buf(); my_describe_type(foo->type); s=simple_free_buf(); fprintf(stderr, "[%s]{",s); free(s); low_print_tree(_CAR(foo),0); fprintf(stderr, "}"); break; } case F_COMMA_EXPR: low_print_tree(_CAR(foo),0); if(_CAR(foo) && _CDR(foo)) { if(_CAR(foo)->type == void_type_string && _CDR(foo)->type == void_type_string) fprintf(stderr, ";\n"); else fprintf(stderr, ",\n"); } low_print_tree(_CDR(foo),needlval); return; case F_ARG_LIST: low_print_tree(_CAR(foo),0); if(_CAR(foo) && _CDR(foo)) { if(_CAR(foo)->type == void_type_string && _CDR(foo)->type == void_type_string) fprintf(stderr, ";\n"); else fputc(',', stderr); } low_print_tree(_CDR(foo),needlval); return; case F_ARRAY_LVALUE: fputc('[', stderr); low_print_tree(_CAR(foo),1); fputc(']', stderr); break; case F_LVALUE_LIST: low_print_tree(_CAR(foo),1); if(_CAR(foo) && _CDR(foo)) fputc(',', stderr); low_print_tree(_CDR(foo),1); return; case F_CONSTANT: { char *s; init_buf(); describe_svalue(& foo->u.sval, 0, 0); s=simple_free_buf(); fprintf(stderr, "%s",s); free(s); break; } case F_VAL_LVAL: low_print_tree(_CAR(foo),0); fprintf(stderr, ",&"); low_print_tree(_CDR(foo),0); return; case F_APPLY: low_print_tree(_CAR(foo),0); fprintf(stderr, "("); low_print_tree(_CDR(foo),0); fprintf(stderr, ")"); return; case F_NORMAL_STMT_LABEL: case F_CUSTOM_STMT_LABEL: fprintf(stderr, "%s:", _CAR(foo)->u.sval.u.string->str); low_print_tree(_CDR(foo),0); return; case F_LOOP: fprintf(stderr, "loop("); if(car_is_node(foo)) low_print_tree(_CAR(foo),0); fprintf(stderr, ",{"); if(cdr_is_node(foo)) low_print_tree(_CDR(foo),0); fprintf(stderr, "})"); return; default: if(!car_is_node(foo) && !cdr_is_node(foo)) { fprintf(stderr, "%s",get_token_name(foo->token)); return; } if(foo->token<256) { fprintf(stderr, "%c(",foo->token); }else{ fprintf(stderr, "%s(",get_token_name(foo->token)); } if(car_is_node(foo)) low_print_tree(_CAR(foo),0); if(car_is_node(foo) && cdr_is_node(foo)) fputc(',', stderr); if(cdr_is_node(foo)) low_print_tree(_CDR(foo),0); fprintf(stderr, ")"); return; } } void print_tree(node *n) { check_tree(n,0); low_print_tree(n,0); fprintf(stderr, "\n"); fflush(stdout); } /* The following routines need much better commenting. */ /* They also needed to support lexical scoping and external variables. * /grubba 2000-08-27 */ /* * Known bugs: * * Aliasing is not handled. * * Called functions are assumed not to use lexical scoping. */ #if MAX_LOCAL > MAX_GLOBAL #define MAX_VAR MAX_LOCAL #else /* MAX_LOCAL <= MAX_GLOBAL */ #define MAX_VAR MAX_GLOBAL #endif /* MAX_LOCAL > MAX_GLOBAL */ /* FIXME: Should perhaps use BLOCK_ALLOC for struct scope_info? */ struct scope_info { struct scope_info *next; int scope_id; char vars[MAX_VAR]; }; struct used_vars { int err; int ext_flags; /* Note that the locals and externals linked lists are sorted on scope_id. */ struct scope_info *locals; /* Lexical scopes. scope_id == depth */ struct scope_info *externals; /* External scopes. scope_id == program_id */ }; #define VAR_BLOCKED 0 #define VAR_UNUSED 1 #define VAR_USED 3 /* FIXME: Shouldn't the following two functions be named "*_or_vars"? */ /* Perform a merge into a. * Note that b is freed. */ static void low_and_vars(struct scope_info **a, struct scope_info *b) { while (*a && b) { if ((*a)->scope_id < b->scope_id) { a = &((*a)->next); } else if ((*a)->scope_id > b->scope_id) { struct scope_info *tmp = *a; *a = b; b = b->next; (*a)->next = tmp; } else { struct scope_info *tmp = b; int e; for (e = 0; e < MAX_VAR; e++) { (*a)->vars[e] |= b->vars[e]; } a = &((*a)->next); b = b->next; free(tmp); } } if (!*a) { *a = b; } } /* NOTE: The second argument will be freed. */ static void do_and_vars(struct used_vars *a,struct used_vars *b) { low_and_vars(&(a->locals), b->locals); low_and_vars(&(a->externals), b->externals); a->err |= b->err; a->ext_flags |= b->ext_flags; free(b); } /* Makes a copy of a. * Note: Can throw errors on out of memory. */ static struct used_vars *copy_vars(struct used_vars *a) { struct used_vars *ret; struct scope_info *src; struct scope_info **dst; ret=(struct used_vars *)xalloc(sizeof(struct used_vars)); src = a->locals; dst = &(ret->locals); *dst = NULL; while (src) { *dst = malloc(sizeof(struct scope_info)); if (!*dst) { src = ret->locals; while(src) { struct scope_info *tmp = src->next; free(src); src = tmp; } free(ret); Pike_error("Out of memory in copy_vars.\n"); return NULL; /* Make sure that the optimizer knows we exit here. */ } MEMCPY(*dst, src, sizeof(struct scope_info)); src = src->next; dst = &((*dst)->next); *dst = NULL; } src = a->externals; dst = &(ret->externals); *dst = NULL; while (src) { *dst = malloc(sizeof(struct scope_info)); if (!*dst) { src = ret->locals; while(src) { struct scope_info *tmp = src->next; free(src); src = tmp; } src = ret->externals; while(src) { struct scope_info *tmp = src->next; free(src); src = tmp; } free(ret); Pike_error("Out of memory in copy_vars.\n"); return NULL; /* Make sure that the optimizer knows we exit here. */ } MEMCPY(*dst, src, sizeof(struct scope_info)); src = src->next; dst = &((*dst)->next); *dst = NULL; } ret->err = a->err; ret->ext_flags = a->ext_flags; return ret; } /* Find the insertion point for the variable a:scope_id:num. * Allocates a new scope if needed. * Can throw errors on out of memory. */ char *find_q(struct scope_info **a, int num, int scope_id) { struct scope_info *new; #ifdef PIKE_DEBUG if (l_flag > 3) { fprintf(stderr, "find_q %d:%d\n", scope_id, num); } #endif /* PIKE_DEBUG */ while (*a && ((*a)->scope_id < scope_id)) { a = &((*a)->next); } if ((*a) && ((*a)->scope_id == scope_id)) { #ifdef PIKE_DEBUG if (l_flag > 4) { fprintf(stderr, "scope found.\n"); } #endif /* PIKE_DEBUG */ return (*a)->vars + num; } #ifdef PIKE_DEBUG if (l_flag > 4) { fprintf(stderr, "Creating new scope.\n"); } #endif /* PIKE_DEBUG */ new = (struct scope_info *)xalloc(sizeof(struct scope_info)); MEMSET(new, VAR_UNUSED, sizeof(struct scope_info)); new->next = *a; new->scope_id = scope_id; *a = new; return new->vars + num; } /* FIXME: Ought to use parent pointer to avoid recursion. */ /* Find the variables that are used in the tree n. */ static int find_used_variables(node *n, struct used_vars *p, int noblock, int overwrite) { struct used_vars *a; char *q; if(!n) return 0; fatal_check_c_stack(16384); switch(n->token) { case F_LOCAL: q = find_q(&(p->locals), n->u.integer.a, n->u.integer.b); #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "local %d:%d is ", n->u.integer.b, n->u.integer.a); } #endif /* PIKE_DEBUG */ goto set_pointer; case F_EXTERNAL: q = find_q(&(p->externals), n->u.integer.b, n->u.integer.a); #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "external %d:%d is ", n->u.integer.a, n->u.integer.b); } #endif /* PIKE_DEBUG */ goto set_pointer; case F_IDENTIFIER: q = find_q(&(p->externals), n->u.id.number, Pike_compiler->new_program->id); if(n->u.id.number > MAX_GLOBAL) { p->err=1; return 0; } #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "external %d:%d is ", Pike_compiler->new_program->id, n->u.id.number); } #endif /* PIKE_DEBUG */ set_pointer: if(overwrite) { if(*q == VAR_UNUSED && !noblock) { *q = VAR_BLOCKED; #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "blocked\n"); } } else { if (l_flag > 2) { fprintf(stderr, "overwritten\n"); } #endif /* PIKE_DEBUG */ } } else { if(*q == VAR_UNUSED) { *q = VAR_USED; #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "used\n"); } } else { if (l_flag > 2) { fprintf(stderr, "kept\n"); } #endif /* PIKE_DEBUG */ } } break; case F_ASSIGN: find_used_variables(CAR(n),p,noblock,0); find_used_variables(CDR(n),p,noblock,1); break; case '?': find_used_variables(CAR(n),p,noblock,0); a=copy_vars(p); find_used_variables(CADR(n),a,noblock,0); find_used_variables(CDDR(n),p,noblock,0); do_and_vars(p, a); break; case F_INC_NEQ_LOOP: case F_DEC_NEQ_LOOP: case F_INC_LOOP: case F_DEC_LOOP: case F_LOOP: case F_FOREACH: case F_FOR: find_used_variables(CAR(n),p,noblock,0); a=copy_vars(p); find_used_variables(CDR(n),a,noblock,0); do_and_vars(p, a); break; case F_SWITCH: find_used_variables(CAR(n),p,noblock,0); a=copy_vars(p); find_used_variables(CDR(n),a,1,0); do_and_vars(p, a); break; case F_DO: a=copy_vars(p); find_used_variables(CAR(n),a,noblock,0); do_and_vars(p, a); find_used_variables(CDR(n),p,noblock,0); break; default: if(car_is_node(n)) find_used_variables(CAR(n),p,noblock,0); if(cdr_is_node(n)) find_used_variables(CDR(n),p,noblock,0); } return 0; } /* FIXME: Ought to use parent pointer to avoid recursion. */ /* no subtility needed */ static void find_written_vars(node *n, struct used_vars *p, int lvalue) { if(!n) return; fatal_check_c_stack(16384); switch(n->token) { case F_LOCAL: if(lvalue) { #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "local %d:%d is written\n", n->u.integer.b, n->u.integer.a); } #endif /* PIKE_DEBUG */ *find_q(&(p->locals), n->u.integer.a, n->u.integer.b) = VAR_USED; } break; case F_EXTERNAL: if(lvalue) { #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "external %d:%d is written\n", n->u.integer.a, n->u.integer.b); } #endif /* PIKE_DEBUG */ *find_q(&(p->externals), n->u.integer.b, n->u.integer.a) = VAR_USED; } break; case F_IDENTIFIER: if(lvalue) { if(n->u.id.number >= MAX_VAR) { p->err=1; return; } #ifdef PIKE_DEBUG if (l_flag > 2) { fprintf(stderr, "external %d:%d is written\n", Pike_compiler->new_program->id, n->u.id.number); } #endif /* PIKE_DEBUG */ *find_q(&(p->externals), n->u.id.number, Pike_compiler->new_program->id) = VAR_USED; } break; case F_APPLY: if(n->tree_info & OPT_SIDE_EFFECT) { p->ext_flags = VAR_USED; } break; case F_INDEX: case F_ARROW: find_written_vars(CAR(n), p, lvalue); find_written_vars(CDR(n), p, 0); break; case F_INC: case F_DEC: case F_POST_INC: case F_POST_DEC: find_written_vars(CAR(n), p, 1); break; case F_ASSIGN: find_written_vars(CAR(n), p, 0); find_written_vars(CDR(n), p, 1); break; case F_AND_EQ: case F_OR_EQ: case F_XOR_EQ: case F_LSH_EQ: case F_RSH_EQ: case F_ADD_EQ: case F_SUB_EQ: case F_MULT_EQ: case F_MOD_EQ: case F_DIV_EQ: find_written_vars(CAR(n), p, 1); find_written_vars(CDR(n), p, 0); break; case F_SSCANF: find_written_vars(CAR(n), p, 0); find_written_vars(CDR(n), p, 1); break; case F_ARRAY_LVALUE: find_written_vars(CAR(n), p, 1); break; case F_LVALUE_LIST: find_written_vars(CAR(n), p, 1); find_written_vars(CDR(n), p, 1); break; case F_VAL_LVAL: find_written_vars(CAR(n), p, 0); find_written_vars(CDR(n), p, 1); break; default: if(car_is_node(n)) find_written_vars(CAR(n), p, 0); if(cdr_is_node(n)) find_written_vars(CDR(n), p, 0); } } void free_vars(struct used_vars *a) { struct scope_info *tmp; tmp = a->locals; while(tmp) { struct scope_info *next = tmp->next; free(tmp); tmp = next; } tmp = a->externals; while(tmp) { struct scope_info *next = tmp->next; free(tmp); tmp = next; } } /* return 1 if A depends on B */ static int depend_p2(node *a, node *b) { struct used_vars aa, bb; int e; ONERROR free_aa; ONERROR free_bb; if(!a || !b || is_const(a)) return 0; aa.err = 0; bb.err = 0; aa.ext_flags = 0; bb.ext_flags = 0; aa.locals = NULL; bb.locals = NULL; aa.externals = NULL; bb.externals = NULL; SET_ONERROR(free_aa, free_vars, &aa); SET_ONERROR(free_bb, free_vars, &bb); find_used_variables(a, &aa, 0, 0); find_written_vars(b, &bb, 0); UNSET_ONERROR(free_bb); UNSET_ONERROR(free_aa); if(aa.err || bb.err) { free_vars(&aa); free_vars(&bb); return 1; } { struct scope_info *aaa = aa.locals; struct scope_info *bbb = bb.locals; while (aaa) { while (bbb && (bbb->scope_id < aaa->scope_id)) { bbb = bbb->next; } if (!bbb) break; if (bbb->scope_id == aaa->scope_id) { for (e = 0; e < MAX_VAR; e++) { if ((aaa->vars[e] == VAR_USED) && (bbb->vars[e] != VAR_UNUSED)) { free_vars(&aa); free_vars(&bb); return 1; } } } aaa = aaa->next; } } if (bb.ext_flags == VAR_USED) { /* No need to look closer at b */ struct scope_info *aaa = aa.externals; /* FIXME: Probably only needed to check if aaa is NULL or not. */ while (aaa) { for (e = 0; e < MAX_VAR; e++) { if (aaa->vars[e] == VAR_USED) { free_vars(&aa); free_vars(&bb); return 1; } } aaa = aaa->next; } } else { struct scope_info *aaa = aa.externals; struct scope_info *bbb = bb.externals; while (aaa) { while (bbb && (bbb->scope_id < aaa->scope_id)) { bbb = bbb->next; } if (!bbb) break; if (bbb->scope_id == aaa->scope_id) { for (e = 0; e < MAX_VAR; e++) { if ((aaa->vars[e] == VAR_USED) && (bbb->vars[e] != VAR_UNUSED)) { free_vars(&aa); free_vars(&bb); return 1; } } } aaa = aaa->next; } } free_vars(&aa); free_vars(&bb); return 0; } static int depend_p3(node *a,node *b) { if(!b) return 0; #if 0 if(!(b->tree_info & OPT_SIDE_EFFECT) && (b->tree_info & OPT_EXTERNAL_DEPEND)) return 1; #endif if((a->tree_info & OPT_EXTERNAL_DEPEND)) return 1; return depend_p2(a,b); } #ifdef PIKE_DEBUG static int depend_p(node *a,node *b) { int ret; if(l_flag > 3) { fprintf(stderr,"Checking if: "); print_tree(a); fprintf(stderr,"Depends on: "); print_tree(b); if(depend_p3(a,b)) { fprintf(stderr,"The answer is (durumroll) : yes\n"); return 1; }else{ fprintf(stderr,"The answer is (durumroll) : no\n"); return 0; } } return depend_p3(a,b); } #else #define depend_p depend_p3 #endif /* Check if n depends on the lvalue lval */ static int depend2_p(node *n, node *lval) { node *tmp; int ret; /* Make a temporary node (lval = 0), so that we can use depend_p(). */ ADD_NODE_REF2(lval, tmp = mknode(F_ASSIGN, mkintnode(0), lval)); ret = depend_p(n, tmp); free_node(tmp); return ret; } /* FIXME: Ought to use parent pointer to avoid recursion. */ static int cntargs(node *n) { if(!n) return 0; switch(n->token) { case F_CAST: case F_SOFT_CAST: case F_APPLY: return n->type != void_type_string; case F_POP_VALUE: case F_FOREACH: case F_LOOP: case F_INC_NEQ_LOOP: case F_DEC_NEQ_LOOP: case F_INC_LOOP: case F_DEC_LOOP: return 0; case F_COMMA_EXPR: case F_VAL_LVAL: case F_LVALUE_LIST: case F_ARG_LIST: fatal_check_c_stack(16384); return cntargs(CAR(n))+cntargs(CDR(n)); /* this might not be true, but it doesn't matter very much */ default: return 1; } } static int function_type_max=0; /* FIXME: Ought to use parent pointer to avoid recursion. */ static void low_build_function_type(node *n) { if(!n) return; if(function_type_max++ > 999) { reset_type_stack(); push_type(T_MIXED); push_type(T_VOID); push_type(T_OR); /* return type is void or mixed */ push_type(T_MIXED); push_type(T_VOID); push_type(T_OR); /* varargs */ push_type(T_MANY); return; } switch(n->token) { case F_COMMA_EXPR: case F_ARG_LIST: fatal_check_c_stack(16384); low_build_function_type(CDR(n)); low_build_function_type(CAR(n)); break; case F_PUSH_ARRAY: /* We let this ruin type-checking for now.. */ reset_type_stack(); push_type(T_MIXED); push_type(T_VOID); push_type(T_OR); /* return type is void or mixed */ push_type(T_MIXED); push_type(T_VOID); push_type(T_OR); /* varargs */ push_type(T_MANY); return; default: if(n->type) { if(n->type == void_type_string) return; push_finished_type(n->type); }else{ push_type(T_MIXED); } #ifdef USE_PIKE_TYPE push_type(T_FUNCTION); #endif /* USE_PIKE_TYPE */ } } void yytype_error(char *msg, struct pike_type *expected_t, struct pike_type *got_t, unsigned int flags) { if (msg) { if (flags & YYTE_IS_WARNING) yywarning("%s", msg); else my_yyerror("%s", msg); } yyexplain_nonmatching_types(expected_t, got_t, flags); } void fix_type_field(node *n) { struct pike_type *type_a, *type_b; struct pike_type *old_type; if (n->type && !(n->node_info & OPT_TYPE_NOT_FIXED)) return; /* assume it is correct */ old_type = n->type; n->type = 0; n->node_info &= ~OPT_TYPE_NOT_FIXED; switch(n->token) { case F_SOFT_CAST: if (CAR(n) && CAR(n)->type) { if (!check_soft_cast(old_type, CAR(n)->type)) { struct pike_string *t1 = describe_type(old_type); struct pike_string *t2 = describe_type(CAR(n)->type); yywarning("Soft cast to %s isn't a restriction of %s.", t1->str, t2->str); free_string(t2); free_string(t1); } /* FIXME: check_soft_cast() is weaker than pike_types_le() * The resulting type should probably be the and between the old * and the new type. */ } /* FALL_THROUGH */ case F_CAST: /* Type-field is correct by definition. */ copy_pike_type(n->type, old_type); break; case F_LAND: case F_LOR: if (!CAR(n) || CAR(n)->type == void_type_string) { yyerror("Conditional uses void expression."); copy_pike_type(n->type, mixed_type_string); break; } if(!match_types(CAR(n)->type, mixed_type_string)) yyerror("Bad conditional expression."); if (!CDR(n) || CDR(n)->type == void_type_string) copy_pike_type(n->type, void_type_string); else if(n->token == F_LAND || CAR(n)->type == CDR(n)->type) { copy_pike_type(n->type, CDR(n)->type); }else{ n->type = or_pike_types(CAR(n)->type, CDR(n)->type, 0); } break; case F_ASSIGN: if (!CAR(n) || (CAR(n)->type == void_type_string)) { my_yyerror("Assigning a void expression."); copy_pike_type(n->type, void_type_string); break; } else if(CAR(n) && CDR(n)) { /* Ensure that the type-fields are up to date. */ fix_type_field(CAR(n)); fix_type_field(CDR(n)); if (!pike_types_le(CAR(n)->type, CDR(n)->type)) { /* a["b"]=c and a->b=c can be valid when a is an array */ if (CDR(n)->token != F_INDEX && CDR(n)->token != F_ARROW && !match_types(CDR(n)->type,CAR(n)->type)) { yytype_error("Bad type in assignment.", CDR(n)->type, CAR(n)->type, 0); } else if (lex.pragmas & ID_STRICT_TYPES) { struct pike_string *t1 = describe_type(CAR(n)->type); struct pike_string *t2 = describe_type(CDR(n)->type); #ifdef PIKE_DEBUG if (l_flag > 0) { fprintf(stderr, "Warning: Invalid assignment: "); print_tree(n); } #endif /* PIKE_DEBUG */ yywarning("An expression type %s cannot be assigned to " "a variable of type %s.", t1->str, t2->str); free_string(t2); free_string(t1); } } } n->type = and_pike_types(CAR(n)->type, CDR(n)->type); break; case F_INDEX: case F_ARROW: if (!CAR(n) || (CAR(n)->type == void_type_string)) { my_yyerror("Indexing a void expression."); /* The optimizer converts this to an expression returning 0. */ copy_pike_type(n->type, zero_type_string); } else { type_a=CAR(n)->type; type_b=CDR(n)->type; if(!check_indexing(type_a, type_b, n)) if(!Pike_compiler->catch_level) my_yyerror("Indexing on illegal type."); n->type=index_type(type_a, type_b,n); } break; case F_APPLY: if (!CAR(n) || (CAR(n)->type == void_type_string)) { my_yyerror("Calling a void expression."); } else { struct pike_type *f; /* Expected type. */ struct pike_type *s; /* Actual type */ char *name; INT32 max_args,args; #if defined(USE_PIKE_TYPE) && defined(NEW_ARG_CHECK) args = 0; copy_pike_type(f, CAR(n)->type); f = new_check_call(CAR(n), &args, f, CDR(n)); if (f && (n->type = get_ret_type(f))) { /* Type/argument-check OK. */ free_type(f); break; } #else /* !(USE_PIKE_TYPE && NEW_ARG_CHECK) */ push_type(T_MIXED); /* match any return type */ push_type(T_VOID); /* even void */ push_type(T_OR); push_type(T_VOID); /* not varargs */ push_type(T_MANY); function_type_max=0; low_build_function_type(CDR(n)); #ifndef USE_PIKE_TYPE push_type(T_FUNCTION); #endif /* !USE_PIKE_TYPE */ s = pop_type(); f = CAR(n)->type?CAR(n)->type:mixed_type_string; n->type = check_call(s, f, (lex.pragmas & ID_STRICT_TYPES) && !(n->node_info & OPT_WEAK_TYPE)); args = count_arguments(s); max_args = count_arguments(f); if(max_args<0) max_args = 0x7fffffff; if (n->type) { /* Type/argument-check OK. */ free_type(s); break; } switch(CAR(n)->token) { #if 0 /* FIXME */ case F_TRAMPOLINE: #endif case F_IDENTIFIER: name=ID_FROM_INT(Pike_compiler->new_program, CAR(n)->u.id.number)->name->str; break; case F_ARROW: case F_INDEX: if(CDAR(n)->token == F_CONSTANT && CDAR(n)->u.sval.type == T_STRING) { name=CDAR(n)->u.sval.u.string->str; }else{ name="dynamically resolved function"; } break; case F_CONSTANT: switch(CAR(n)->u.sval.type) { case T_FUNCTION: if(CAR(n)->u.sval.subtype == FUNCTION_BUILTIN) { name=CAR(n)->u.sval.u.efun->name->str; }else{ name=ID_FROM_INT(CAR(n)->u.sval.u.object->prog, CAR(n)->u.sval.subtype)->name->str; } break; case T_ARRAY: name="array call"; break; case T_PROGRAM: name="clone call"; break; default: name="`() (function call)"; break; } break; case F_EXTERNAL: { int program_id = CAR(n)->u.integer.a; int id_no = CAR(n)->u.integer.b; struct program_state *state = Pike_compiler; name="external symbol"; while (state && (state->new_program->id != program_id)) { state = state->previous; } if (state) { struct identifier *id = ID_FROM_INT(state->new_program, id_no); if (id && id->name) { name = id->name->str; #ifdef PIKE_DEBUG /* FIXME: This test crashes on valid code because the type of the * identifier can change in pass 2 -Hubbe */ if(id->type != f) { printf("Type of external node is not matching it's identifier.\nid->type: "); simple_describe_type(id->type); printf("\nf : "); simple_describe_type(f); printf("\n"); fatal("Type of external node is not matching it's identifier.\n"); } #endif } } } break; default: name="unknown function"; } if(max_args < args) { if(TEST_COMPAT(0,6)) { free_type(s); copy_pike_type(n->type, mixed_type_string); break; } my_yyerror("Too many arguments to %s.",name); } else if(max_correct_args == args) { my_yyerror("Too few arguments to %s.",name); }else{ my_yyerror("Bad argument %d to %s.", max_correct_args+1, name); } yytype_error(NULL, f, s, 0); /* print_tree(n); */ free_type(s); #endif /* USE_PIKE_TYPE && NEW_ARG_CHECK */ } copy_pike_type(n->type, mixed_type_string); break; case '?': if (!CAR(n) || (CAR(n)->type == void_type_string)) { yyerror("Conditional expression is void."); } else if(!match_types(CAR(n)->type, mixed_type_string)) yyerror("Bad conditional expression."); if(!CDR(n) || !CADR(n) || !CDDR(n) || CADR(n)->type == void_type_string || CDDR(n)->type == void_type_string) { copy_pike_type(n->type, void_type_string); break; } if(CADR(n)->type == CDDR(n)->type) { copy_pike_type(n->type, CADR(n)->type); break; } n->type = or_pike_types(CADR(n)->type, CDDR(n)->type, 0); break; case F_AND_EQ: case F_OR_EQ: case F_XOR_EQ: case F_LSH_EQ: case F_RSH_EQ: case F_ADD_EQ: case F_SUB_EQ: case F_MULT_EQ: case F_MOD_EQ: case F_DIV_EQ: if (CAR(n)) { struct pike_string *op_string = NULL; struct pike_type *call_type; node *op_node; /* Go via var = OP(var, expr); * * FIXME: To restrict the type further: * type = typeof(OP(var, expr)) AND typeof(var); */ switch(n->token) { case F_AND_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`&"); break; case F_OR_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`|"); break; case F_XOR_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`^"); break; case F_LSH_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`<<"); break; case F_RSH_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`>>"); break; case F_ADD_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`+"); break; case F_SUB_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`-"); break; case F_MULT_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`*"); break; case F_MOD_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`%"); break; case F_DIV_EQ: MAKE_CONSTANT_SHARED_STRING(op_string, "`/"); break; default: fatal("fix_type_field(): Unhandled token: %d\n", n->token); break; } if (!(op_node = find_module_identifier(op_string, 0))) { my_yyerror("Internally used efun undefined for token %d: %s()", n->token, op_string->str); copy_pike_type(n->type, mixed_type_string); free_string(op_string); break; } if (!op_node->type) { fix_type_field(op_node); } push_finished_type(CAR(n)->type); push_type(T_VOID); push_type(T_MANY); push_finished_type(CDR(n)->type); #ifdef USE_PIKE_TYPE push_type(T_FUNCTION); #endif /* USE_PIKE_TYPE */ push_finished_type(CAR(n)->type); push_type(T_FUNCTION); call_type = pop_type(); n->type = check_call(call_type, op_node->type ? op_node->type : mixed_type_string, (lex.pragmas & ID_STRICT_TYPES) && !(op_node->node_info & OPT_WEAK_TYPE)); if (n->type) { /* Type check ok. */ free_node(op_node); free_type(call_type); free_string(op_string); break; } my_yyerror("Bad arguments to %s=().", op_string->str); yytype_error(NULL, op_node->type ? op_node->type : mixed_type_string, call_type, 0); free_node(op_node); free_type(call_type); free_string(op_string); } copy_pike_type(n->type, mixed_type_string); break; case F_RANGE: case F_INC: case F_DEC: case F_POST_INC: case F_POST_DEC: if (CAR(n)) { /* The expression gets the type from the variable. */ /* FIXME: Ought to strip non-applicable subtypes from the type. */ copy_pike_type(n->type, CAR(n)->type); } else { copy_pike_type(n->type, mixed_type_string); } break; case F_RETURN: if (!CAR(n) || (CAR(n)->type == void_type_string)) { yywarning("Returning a void expression."); if (!CAR(n)) { #ifdef SHARED_NODES sub_node(n); #endif /* SHARED_NODES */ _CAR(n) = mkintnode(0); copy_pike_type(n->type, CAR(n)->type); #ifdef SHARED_NODES if (!(n->tree_info & OPT_NOT_SHARED)) { n->hash = hash_node(n); } n->node_info |= OPT_DEFROSTED; add_node(n); #endif /* SHARED_NODES */ break; } } else if(Pike_compiler->compiler_frame && Pike_compiler->compiler_frame->current_return_type) { if (!pike_types_le(CAR(n)->type, Pike_compiler->compiler_frame->current_return_type) && !( Pike_compiler->compiler_frame->current_return_type==void_type_string && CAR(n)->token == F_CONSTANT && IS_ZERO(& CAR(n)->u.sval) ) ) { if (!match_types(Pike_compiler->compiler_frame->current_return_type, CAR(n)->type)) { yyerror("Wrong return type."); yyexplain_nonmatching_types(Pike_compiler->compiler_frame->current_return_type, CAR(n)->type, 0); } else if (lex.pragmas & ID_STRICT_TYPES) { yytype_error("Return type mismatch.", Pike_compiler->compiler_frame->current_return_type, CAR(n)->type, YYTE_IS_WARNING); } } } copy_pike_type(n->type, void_type_string); break; case F_CASE: if (CDR(n) && CAR(n) && !TEST_COMPAT(0,6)) { /* case 1 .. 2: */ if (!match_types(CAR(n)->type, CDR(n)->type)) { if (!match_types(CAR(n)->type, int_type_string) || !match_types(CDR(n)->type, int_type_string)) { yytype_error("Type mismatch in case range.", CAR(n)->type, CDR(n)->type, 0); } } else if ((lex.pragmas & ID_STRICT_TYPES) && (CAR(n)->type != CDR(n)->type)) { /* The type should be the same for both CAR & CDR. */ if (!pike_types_le(CDR(n)->type, CAR(n)->type)) { /* Note that zero should be handled as int(0..0) here. */ if (!(CAR(n)->type == zero_type_string) || !(pike_types_le(CDR(n)->type, int_type_string))) { yytype_error("Type mismatch in case range.", CAR(n)->type, CDR(n)->type, YYTE_IS_WARNING); } } else if (!pike_types_le(CAR(n)->type, CDR(n)->type)) { if (!(CDR(n)->type == zero_type_string) || !(pike_types_le(CAR(n)->type, int_type_string))) { yytype_error("Type mismatch in case range.", CDR(n)->type, CAR(n)->type, YYTE_IS_WARNING); } } } } /* FALL_THROUGH */ case F_INC_LOOP: case F_DEC_LOOP: case F_DEC_NEQ_LOOP: case F_INC_NEQ_LOOP: case F_LOOP: case F_CONTINUE: case F_BREAK: case F_DEFAULT: case F_POP_VALUE: copy_pike_type(n->type, void_type_string); break; case F_DO: if (!CDR(n) || (CDR(n)->type == void_type_string)) { yyerror("do - while(): Conditional expression is void."); } else if(!match_types(CDR(n)->type, mixed_type_string)) yyerror("Bad conditional expression do - while()."); copy_pike_type(n->type, void_type_string); break; case F_FOR: if (!CAR(n) || (CAR(n)->type == void_type_string)) { yyerror("for(): Conditional expression is void."); } else if(!match_types(CAR(n)->type, mixed_type_string)) yyerror("Bad conditional expression for()."); copy_pike_type(n->type, void_type_string); break; case F_SWITCH: if (!CAR(n) || (CAR(n)->type == void_type_string)) { yyerror("switch(): Conditional expression is void."); } else if(!match_types(CAR(n)->type, mixed_type_string)) yyerror("Bad switch expression."); copy_pike_type(n->type, void_type_string); break; case F_CONSTANT: n->type = get_type_of_svalue(& n->u.sval); break; case F_FOREACH: if (!CAR(n) || (CAR(n)->token != F_VAL_LVAL)) { yyerror("foreach(): No expression to loop over."); } else { if (!CAAR(n) || pike_types_le(CAAR(n)->type, void_type_string)) { yyerror("foreach(): Looping over a void expression."); } else { if(CDAR(n) && CDAR(n)->token == ':') { /* Check the iterator type */ struct pike_type *iterator_type; struct pike_type *foreach_call_type; MAKE_CONSTANT_TYPE(iterator_type, tOr5(tArray, tStr, tObj, tMapping, tMultiset)); if (!pike_types_le(CAAR(n)->type, iterator_type)) { if (!match_types(CAAR(n)->type, iterator_type)) { yytype_error("Bad argument 1 to foreach()", iterator_type, CAAR(n)->type, 0); /* No use checking the index and value types if * the iterator type is bad. */ free_type(iterator_type); goto foreach_type_check_done; } else if (lex.pragmas & ID_STRICT_TYPES) { yytype_error("Iterator type mismatch in foreach()", iterator_type, CAAR(n)->type, YYTE_IS_WARNING); } } free_type(iterator_type); push_type(T_MIXED); push_type(T_VOID); push_type(T_MANY); push_finished_type(CAAR(n)->type); push_type(T_FUNCTION); foreach_call_type = pop_type(); if (CADAR(n)) { /* Check the index type */ struct pike_type *index_fun_type; struct pike_type *index_type; MAKE_CONSTANT_TYPE(index_fun_type, tOr4(tFunc(tOr(tArray, tStr), tZero), tFunc(tMap(tSetvar(0, tMix), tMix), tVar(0)), tFunc(tSet(tSetvar(1, tMix)), tVar(1)), tFunc(tObj, tZero))); index_type = check_call(foreach_call_type, index_fun_type, 0); if (!index_type) { /* Should not happen. */ yyerror("Bad iterator type for index in foreach()."); } else { if (!pike_types_le(index_type, CADAR(n)->type)) { if (!match_types(CADAR(n)->type, index_type)) { yytype_error("Type mismatch for index in foreach().", index_type, CADAR(n)->type, 0); } else if (lex.pragmas & ID_STRICT_TYPES) { yytype_error("Type mismatch for index in foreach().", index_type, CADAR(n)->type, YYTE_IS_WARNING); } } free_type(index_type); } free_type(index_fun_type); } if (CDDAR(n)) { /* Check the value type */ struct pike_type *value_fun_type; struct pike_type *value_type; MAKE_CONSTANT_TYPE(value_fun_type, tOr5(tFunc(tArr(tSetvar(0, tMix)), tVar(0)), tFunc(tStr, tZero), tFunc(tMap(tMix,tSetvar(1, tMix)), tVar(1)), tFunc(tMultiset, tInt1), tFunc(tObj, tZero))); value_type = check_call(foreach_call_type, value_fun_type, 0); if (!value_type) { /* Should not happen. */ yyerror("Bad iterator type for value in foreach()."); } else { if (!pike_types_le(value_type, CDDAR(n)->type)) { if (!match_types(CDDAR(n)->type, value_type)) { yytype_error("Type mismatch for value in foreach().", value_type, CDDAR(n)->type, 0); } else if (lex.pragmas & ID_STRICT_TYPES) { yytype_error("Type mismatch for value in foreach().", value_type, CDDAR(n)->type, YYTE_IS_WARNING); } } free_type(value_type); } free_type(value_fun_type); } free_type(foreach_call_type); } else { /* Old-style foreach */ struct pike_type *array_zero; MAKE_CONSTANT_TYPE(array_zero, tArr(tZero)); if (!pike_types_le(array_zero, CAAR(n)->type)) { yyerror("Bad argument 1 to foreach()."); } else { if ((lex.pragmas & ID_STRICT_TYPES) && !pike_types_le(CAAR(n)->type, array_type_string)) { struct pike_string *t = describe_type(CAAR(n)->type); yywarning("Argument 1 to foreach() is not always an array."); yywarning("Got: %s", t->str); free_string(t); } if (!CDAR(n) || pike_types_le(CDAR(n)->type, void_type_string)) { yyerror("Bad argument 2 to foreach()."); } else { struct pike_type *value_type = array_value_type(CAAR(n)->type); if (!pike_types_le(value_type, CDAR(n)->type)) { if (!match_types(value_type, CDAR(n)->type)) { yytype_error("Variable type mismatch in foreach().", value_type, CDAR(n)->type, 0); } else if (lex.pragmas & ID_STRICT_TYPES) { yytype_error("Variable type mismatch in foreach().", value_type, CDAR(n)->type, YYTE_IS_WARNING); } } free_type(value_type); } } free_type(array_zero); } } } foreach_type_check_done: copy_pike_type(n->type, void_type_string); break; case F_SSCANF: if (!CAR(n) || (CAR(n)->token != F_ARG_LIST) || !CAAR(n) || !CDAR(n)) { yyerror("Too few arguments to sscanf()."); } else { if (!pike_types_le(CAAR(n)->type, string_type_string)) { if (!match_types(CAAR(n)->type, string_type_string)) { yytype_error("Bad argument 1 to sscanf().", string_type_string, CAAR(n)->type, 0); } else if (lex.pragmas & ID_STRICT_TYPES) { yytype_error("Argument 1 to sscanf() has bad type.", string_type_string, CAAR(n)->type, YYTE_IS_WARNING); } } if (!pike_types_le(CDAR(n)->type, string_type_string)) { if (!match_types(CDAR(n)->type, string_type_string)) { yytype_error("Bad argument 2 to sscanf().", string_type_string, CDAR(n)->type, 0); } else if (lex.pragmas & ID_STRICT_TYPES) { yytype_error("Argument 2 to sscanf() has bad type.", string_type_string, CDAR(n)->type, YYTE_IS_WARNING); } } } /* FIXME: */ MAKE_CONSTANT_TYPE(n->type, tIntPos); break; case F_UNDEFINED: copy_pike_type(n->type, zero_type_string); break; case F_ARG_LIST: if (n->parent) { /* Propagate the changed type all the way up to the apply node. */ n->parent->node_info |= OPT_TYPE_NOT_FIXED; } /* FALL_THROUGH */ case F_COMMA_EXPR: if(!CAR(n) || CAR(n)->type==void_type_string) { if(CDR(n)) copy_pike_type(n->type, CDR(n)->type); else copy_pike_type(n->type, void_type_string); break; } if(!CDR(n) || CDR(n)->type == void_type_string) { if(CAR(n)) copy_pike_type(n->type, CAR(n)->type); else copy_pike_type(n->type, void_type_string); break; } if (n->token == F_ARG_LIST) { n->type = or_pike_types(CAR(n)->type, CDR(n)->type, 0); } else { copy_pike_type(n->type, CDR(n)->type); } break; case F_MAGIC_INDEX: /* FIXME: Could have a stricter type for ::`->(). */ /* FIXME: */ MAKE_CONSTANT_TYPE(n->type, tFunc(tMix,tMix)); break; case F_MAGIC_SET_INDEX: /* FIXME: Could have a stricter type for ::`->=(). */ /* FIXME: */ MAKE_CONSTANT_TYPE(n->type, tFunc(tMix tSetvar(0,tMix), tVar(0))); break; case F_CATCH: /* FALL_THROUGH */ default: copy_pike_type(n->type, mixed_type_string); } if (n->type != old_type) { if (n->parent) { n->parent->node_info |= OPT_TYPE_NOT_FIXED; } } if (old_type) { free_type(old_type); } #ifdef PIKE_DEBUG check_type_string(n->type); #endif /* PIKE_DEBUG */ } static void zapp_try_optimize(node *n) { node *parent; node *orig_n = n; if(!n) return; parent = n->parent; n->parent = NULL; while(1) { n->node_info &= ~OPT_TRY_OPTIMIZE; n->tree_info &= ~OPT_TRY_OPTIMIZE; if (car_is_node(n)) { CAR(n)->parent = n; n = CAR(n); continue; } if (cdr_is_node(n)) { CDR(n)->parent = n; n = CDR(n); continue; } while (n->parent && (!cdr_is_node(n->parent) || (CDR(n->parent) == n))) { n = n->parent; } if (n->parent && cdr_is_node(n->parent)) { CDR(n->parent)->parent = n->parent; n = CDR(n->parent); continue; } break; } #ifdef PIKE_DEBUG if (n != orig_n) { fatal("zzap_try_optimize() lost track of parent.\n"); } #endif /* PIKE_DEBUG */ n->parent = parent; } #if defined(SHARED_NODES) && !defined(IN_TPIKE) /* FIXME: Ought to use parent pointer to avoid recursion. */ static void find_usage(node *n, unsigned char *usage, unsigned char *switch_u, const unsigned char *cont_u, const unsigned char *break_u, const unsigned char *catch_u) { if (!n) return; fatal_check_c_stack(16384); switch(n->token) { case F_ASSIGN: if ((CDR(n)->token == F_LOCAL) && (!CDR(n)->u.integer.b)) { usage[CDR(n)->u.integer.a] = 0; } else if (CDR(n)->token == F_ARRAY_LVALUE) { find_usage(CDR(n), usage, switch_u, cont_u, break_u, catch_u); } find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return; case F_SSCANF: { int i; /* catch_usage is restored if sscanf throws an error. */ for (i=0; i < MAX_LOCAL; i++) { usage[i] |= catch_u[i]; } /* Only the first two arguments are evaluated. */ if (CAR(n)) { find_usage(CDAR(n), usage, switch_u, cont_u, break_u, catch_u); find_usage(CAAR(n), usage, switch_u, cont_u, break_u, catch_u); } return; } case F_CATCH: { unsigned char catch_usage[MAX_LOCAL]; int i; MEMCPY(catch_usage, usage, MAX_LOCAL); find_usage(CAR(n), usage, switch_u, cont_u, catch_usage, catch_usage); for(i=0; i < MAX_LOCAL; i++) { usage[i] |= catch_usage[i]; } return; } case F_APPLY: { int i; /* catch_usage is restored if the function throws an error. */ for (i=0; i < MAX_LOCAL; i++) { usage[i] |= catch_u[i]; } find_usage(CDR(n), usage, switch_u, cont_u, break_u, catch_u); find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return; } case F_LVALUE_LIST: find_usage(CDR(n), usage, switch_u, cont_u, break_u, catch_u); if (CAR(n)) { if ((CAR(n)->token == F_LOCAL) && (!CAR(n)->u.integer.b)) { usage[CAR(n)->u.integer.a] = 0; } } return; case F_ARRAY_LVALUE: find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return; case F_CONTINUE: MEMCPY(usage, cont_u, MAX_LOCAL); return; case F_BREAK: MEMCPY(usage, break_u, MAX_LOCAL); return; case F_DEFAULT: case F_CASE: { int i; find_usage(CDR(n), usage, switch_u, cont_u, break_u, catch_u); find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); for(i = 0; i < MAX_LOCAL; i++) { switch_u[i] |= usage[i]; } return; } case F_SWITCH: { unsigned char break_usage[MAX_LOCAL]; unsigned char switch_usage[MAX_LOCAL]; int i; MEMSET(switch_usage, 0, MAX_LOCAL); MEMCPY(break_usage, usage, MAX_LOCAL); find_usage(CDR(n), usage, switch_usage, cont_u, break_usage, catch_u); for(i = 0; i < MAX_LOCAL; i++) { usage[i] |= switch_usage[i]; } find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return; } case F_RETURN: MEMSET(usage, 0, MAX_LOCAL); /* FIXME: The function arguments should be marked "used", since * they are seen in backtraces. */ return; case F_LOR: case F_LAND: { unsigned char trail_usage[MAX_LOCAL]; int i; MEMCPY(trail_usage, usage, MAX_LOCAL); find_usage(CDR(n), usage, switch_u, cont_u, break_u, catch_u); for(i=0; i < MAX_LOCAL; i++) { usage[i] |= trail_usage[i]; } find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return; } case '?': { unsigned char cadr_usage[MAX_LOCAL]; unsigned char cddr_usage[MAX_LOCAL]; int i; MEMCPY(cadr_usage, usage, MAX_LOCAL); MEMCPY(cddr_usage, usage, MAX_LOCAL); find_usage(CADR(n), cadr_usage, switch_u, cont_u, break_u, catch_u); find_usage(CDDR(n), cddr_usage, switch_u, cont_u, break_u, catch_u); for (i=0; i < MAX_LOCAL; i++) { usage[i] = cadr_usage[i] | cddr_usage[i]; } find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return; } case F_DO: { unsigned char break_usage[MAX_LOCAL]; unsigned char continue_usage[MAX_LOCAL]; MEMCPY(break_usage, usage, MAX_LOCAL); find_usage(CDR(n), usage, switch_u, cont_u, break_usage, catch_u); MEMCPY(continue_usage, usage, MAX_LOCAL); find_usage(CAR(n), usage, switch_u, break_usage, continue_usage, catch_u); return; } case F_FOR: { unsigned char loop_usage[MAX_LOCAL]; unsigned char break_usage[MAX_LOCAL]; unsigned char continue_usage[MAX_LOCAL]; node *car1, cadr, cddr; int i; MEMCPY(break_usage, usage, MAX_LOCAL); /* for(;a;b) c; is handled like: * * if (a) { do { c; b; } while(a); } */ MEMSET(loop_usage, 0, MAX_LOCAL); find_usage(CAR(n), loop_usage, switch_u, cont_u, break_u, catch_u); if (CDR(n)) { find_usage(CDDR(n), loop_usage, switch_u, cont_u, break_usage, catch_u); MEMCPY(continue_usage, loop_usage, MAX_LOCAL); find_usage(CADR(n), loop_usage, switch_u, continue_usage, break_usage, catch_u); } for (i = 0; i < MAX_LOCAL; i++) { usage[i] |= loop_usage[i]; } find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return; } case F_FOREACH: { unsigned char loop_usage[MAX_LOCAL]; unsigned char break_usage[MAX_LOCAL]; unsigned char continue_usage[MAX_LOCAL]; int i; MEMCPY(break_usage, usage, MAX_LOCAL); /* Find the usage from the loop */ MEMSET(loop_usage, 0, MAX_LOCAL); MEMCPY(continue_usage, usage, MAX_LOCAL); find_usage(CDR(n), loop_usage, switch_u, continue_usage, break_usage, catch_u); if (CDAR(n)->token == F_LOCAL) { if (!(CDAR(n)->u.integer.b)) { loop_usage[CDAR(n)->u.integer.a] = 0; } } else if (CDAR(n)->token == F_LVALUE_LIST) { find_usage(CDAR(n), loop_usage, switch_u, cont_u, break_u, catch_u); } for(i=0; i < MAX_LOCAL; i++) { usage[i] |= loop_usage[i]; } find_usage(CAAR(n), usage, switch_u, cont_u, break_u, catch_u); return; } case F_LOCAL: /* Use of local variable. */ if (!n->u.integer.b) { /* Recently used, and used at all */ usage[n->u.integer.a] = 3; } return; default: if (cdr_is_node(n)) { find_usage(CDR(n), usage, switch_u, cont_u, break_u, catch_u); } if (car_is_node(n)) { find_usage(CAR(n), usage, switch_u, cont_u, break_u, catch_u); } return; } } /* Note: Always builds a new tree. */ static node *low_localopt(node *n, unsigned char *usage, unsigned char *switch_u, const unsigned char *cont_u, const unsigned char *break_u, const unsigned char *catch_u) { node *car, *cdr; if (!n) return NULL; switch(n->token) { /* FIXME: Does not support F_LOOP yet. */ case F_ASSIGN: if ((CDR(n)->token == F_LOCAL) && (!CDR(n)->u.integer.b)) { /* Assignment of local variable */ if (!(usage[CDR(n)->u.integer.a] & 1)) { /* Value isn't used. */ struct pike_type *ref_type; MAKE_CONSTANT_TYPE(ref_type, tOr(tComplex, tString)); if (!match_types(CDR(n)->type, ref_type)) { /* The variable doesn't hold a refcounted value. */ free_type(ref_type); return low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u); } free_type(ref_type); } usage[CDR(n)->u.integer.a] = 0; cdr = CDR(n); ADD_NODE_REF(cdr); } else if (CDR(n)->token == F_ARRAY_LVALUE) { cdr = low_localopt(CDR(n), usage, switch_u, cont_u, break_u, catch_u); } else { cdr = CDR(n); ADD_NODE_REF(cdr); } return mknode(F_ASSIGN, low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u), cdr); case F_SSCANF: { int i; /* catch_usage is restored if sscanf throws an error. */ for (i=0; i < MAX_LOCAL; i++) { usage[i] |= catch_u[i]; } /* Only the first two arguments are evaluated. */ if (CAR(n)) { cdr = low_localopt(CDAR(n), usage, switch_u, cont_u, break_u, catch_u); car = low_localopt(CAAR(n), usage, switch_u, cont_u, break_u, catch_u); if (CDR(n)) { ADD_NODE_REF(CDR(n)); } return mknode(F_SSCANF, mknode(F_ARG_LIST, car, cdr), CDR(n)); } ADD_NODE_REF(n); return n; } case F_CATCH: { unsigned char catch_usage[MAX_LOCAL]; int i; MEMCPY(catch_usage, usage, MAX_LOCAL); car = low_localopt(CAR(n), usage, switch_u, cont_u, catch_usage, catch_usage); for(i=0; i < MAX_LOCAL; i++) { usage[i] |= catch_usage[i]; } return mknode(F_CATCH, car, 0); } break; case F_APPLY: { int i; /* catch_usage is restored if the function throws an error. */ for (i=0; i < MAX_LOCAL; i++) { usage[i] |= catch_u[i]; } cdr = low_localopt(CDR(n), usage, switch_u, cont_u, break_u, catch_u); car = low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return mknode(F_APPLY, car, cdr); } case F_LVALUE_LIST: cdr = low_localopt(CDR(n), usage, switch_u, cont_u, break_u, catch_u); if (CAR(n)) { if ((CAR(n)->token == F_LOCAL) && (!CAR(n)->u.integer.b)) { /* Array assignment of local variable. */ if (!(usage[CDR(n)->u.integer.a] & 1)) { /* Variable isn't used. */ /* FIXME: Warn? */ } usage[CAR(n)->u.integer.a] = 0; } ADD_NODE_REF(CAR(n)); } return mknode(F_LVALUE_LIST, CAR(n), cdr); case F_ARRAY_LVALUE: return mknode(F_ARRAY_LVALUE, low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u), 0); case F_CAST: return mkcastnode(n->type, low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u)); case F_SOFT_CAST: return mksoftcastnode(n->type, low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u)); case F_CONTINUE: MEMCPY(usage, cont_u, MAX_LOCAL); ADD_NODE_REF(n); return n; case F_BREAK: MEMCPY(usage, break_u, MAX_LOCAL); ADD_NODE_REF(n); return n; case F_DEFAULT: case F_CASE: { int i; cdr = low_localopt(CDR(n), usage, switch_u, cont_u, break_u, catch_u); car = low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u); for(i = 0; i < MAX_LOCAL; i++) { switch_u[i] |= usage[i]; } return mknode(n->token, car, cdr); } case F_SWITCH: { unsigned char break_usage[MAX_LOCAL]; unsigned char switch_usage[MAX_LOCAL]; int i; MEMSET(switch_usage, 0, MAX_LOCAL); MEMCPY(break_usage, usage, MAX_LOCAL); cdr = low_localopt(CDR(n), usage, switch_usage, cont_u, break_usage, catch_u); for(i = 0; i < MAX_LOCAL; i++) { usage[i] |= switch_usage[i]; } car = low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return mknode(F_SWITCH, car, cdr); } case F_RETURN: MEMSET(usage, 0, MAX_LOCAL); /* FIXME: The function arguments should be marked "used", since * they are seen in backtraces. */ return mknode(F_RETURN, low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u), 0); case F_LOR: case F_LAND: { unsigned char trail_usage[MAX_LOCAL]; int i; MEMCPY(trail_usage, usage, MAX_LOCAL); cdr = low_localopt(CDR(n), usage, switch_u, cont_u, break_u, catch_u); for(i=0; i < MAX_LOCAL; i++) { usage[i] |= trail_usage[i]; } car = low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return mknode(n->token, car, cdr); } case '?': { unsigned char cadr_usage[MAX_LOCAL]; unsigned char cddr_usage[MAX_LOCAL]; int i; MEMCPY(cadr_usage, usage, MAX_LOCAL); MEMCPY(cddr_usage, usage, MAX_LOCAL); car = low_localopt(CADR(n), cadr_usage, switch_u, cont_u, break_u, catch_u); cdr = low_localopt(CDDR(n), cddr_usage, switch_u, cont_u, break_u, catch_u); for (i=0; i < MAX_LOCAL; i++) { usage[i] = cadr_usage[i] | cddr_usage[i]; } cdr = mknode(':', car, cdr); car = low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u); return mknode('?', car, cdr); } case F_DO: { unsigned char break_usage[MAX_LOCAL]; unsigned char continue_usage[MAX_LOCAL]; int i; MEMCPY(break_usage, usage, MAX_LOCAL); /* Find the usage from the loop */ find_usage(CDR(n), usage, switch_u, cont_u, break_u, catch_u); MEMCPY(continue_usage, usage, MAX_LOCAL); find_usage(CAR(n), usage, switch_u, continue_usage, break_usage, catch_u); for (i = 0; i < MAX_LOCAL; i++) { usage[i] |= break_usage[i]; } cdr = low_localopt(CDR(n), usage, switch_u, cont_u, break_usage, catch_u); MEMCPY(continue_usage, usage, MAX_LOCAL); car = low_localopt(CAR(n), usage, switch_u, continue_usage, break_usage, catch_u); return mknode(F_DO, car, cdr); } case F_FOR: { unsigned char loop_usage[MAX_LOCAL]; unsigned char break_usage[MAX_LOCAL]; unsigned char continue_usage[MAX_LOCAL]; int i; MEMCPY(break_usage, usage, MAX_LOCAL); /* * if (a A|B) { * B * do { * B * c; * continue: * D * b; * C * } while (a A|B); * A * } * break: * A */ /* Find the usage from the loop. */ MEMSET(loop_usage, 0, MAX_LOCAL); find_usage(CAR(n), loop_usage, switch_u, cont_u, break_u, catch_u); if (CDR(n)) { find_usage(CDDR(n), loop_usage, switch_u, cont_u, break_usage, catch_u); MEMCPY(continue_usage, loop_usage, MAX_LOCAL); find_usage(CADR(n), loop_usage, switch_u, continue_usage, break_usage, catch_u); } for (i = 0; i < MAX_LOCAL; i++) { usage[i] |= loop_usage[i]; } /* The last thing to be evaluated is the conditional */ car = low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u); if (CDR(n)) { node *cadr, *cddr; /* The incrementor */ cddr = low_localopt(CDDR(n), usage, switch_u, cont_u, break_usage, catch_u); MEMCPY(continue_usage, usage, MAX_LOCAL); /* The body */ cadr = low_localopt(CADR(n), usage, switch_u, continue_usage, break_usage, catch_u); cdr = mknode(':', cadr, cddr); } else { cdr = 0; } for (i = 0; i < MAX_LOCAL; i++) { usage[i] |= break_usage[i]; } /* The conditional is also the first thing to be evaluated. */ find_usage(car, usage, switch_u, cont_u, break_u, catch_u); return mknode(F_FOR, car, cdr); } case F_FOREACH: { unsigned char loop_usage[MAX_LOCAL]; unsigned char break_usage[MAX_LOCAL]; unsigned char continue_usage[MAX_LOCAL]; int i; MEMCPY(break_usage, usage, MAX_LOCAL); /* * D * arr = copy_value(arr); * int i = 0; * A|B * while (i < sizeof(arr)) { * B * loopvar = arr[i]; * C * body; * continue: * A|B * } * break: * A */ /* Find the usage from the loop */ MEMSET(loop_usage, 0, MAX_LOCAL); MEMCPY(continue_usage, usage, MAX_LOCAL); find_usage(CDR(n), loop_usage, switch_u, continue_usage, break_usage, catch_u); if (CDAR(n)->token == F_LOCAL) { if (!(CDAR(n)->u.integer.b)) { loop_usage[CDAR(n)->u.integer.a] = 0; } } else if (CDAR(n)->token == F_LVALUE_LIST) { find_usage(CDAR(n), loop_usage, switch_u, cont_u, break_u, catch_u); } for (i = 0; i < MAX_LOCAL; i++) { usage[i] |= loop_usage[i]; } MEMCPY(continue_usage, usage, MAX_LOCAL); cdr = low_localopt(CDR(n), usage, switch_u, continue_usage, break_usage, catch_u); if (CDAR(n)->token == F_LOCAL) { if (!(CDAR(n)->u.integer.b)) { usage[CDAR(n)->u.integer.a] = 0; } } else if (CDAR(n)->token == F_LVALUE_LIST) { find_usage(CDAR(n), usage, switch_u, cont_u, break_u, catch_u); } for (i = 0; i < MAX_LOCAL; i++) { usage[i] |= break_usage[i]; } car = low_localopt(CAAR(n), usage, switch_u, cont_u, break_u, catch_u); ADD_NODE_REF(CDAR(n)); return mknode(F_FOREACH, mknode(F_VAL_LVAL, car, CDAR(n)), cdr); } case F_LOCAL: /* Use of local variable. */ if (!n->u.integer.b) { /* Recently used, and used at all */ usage[n->u.integer.a] = 3; } ADD_NODE_REF(n); return n; default: if (cdr_is_node(n)) { cdr = low_localopt(CDR(n), usage, switch_u, cont_u, break_u, catch_u); return mknode(n->token, low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u), cdr); } if (car_is_node(n)) { ADD_NODE_REF(CDR(n)); return mknode(n->token, low_localopt(CAR(n), usage, switch_u, cont_u, break_u, catch_u), CDR(n)); } ADD_NODE_REF(n); return n; } } static node *localopt(node *n) { unsigned char usage[MAX_LOCAL]; unsigned char b_usage[MAX_LOCAL]; unsigned char c_usage[MAX_LOCAL]; unsigned char s_usage[MAX_LOCAL]; unsigned char catch_usage[MAX_LOCAL]; node *n2; MEMSET(usage, 0, MAX_LOCAL); MEMSET(b_usage, 0, MAX_LOCAL); MEMSET(c_usage, 0, MAX_LOCAL); MEMSET(s_usage, 0, MAX_LOCAL); MEMSET(catch_usage, 0, MAX_LOCAL); n2 = low_localopt(n, usage, s_usage, c_usage, b_usage, catch_usage); #ifdef PIKE_DEBUG if (l_flag > 0) { if ((n2 != n) || (l_flag > 4)) { fprintf(stderr, "\nBefore localopt: "); print_tree(n); fprintf(stderr, "After localopt: "); print_tree(n2); } } #endif /* PIKE_DEBUG */ free_node(n); return n2; } #endif /* SHARED_NODES && !IN_TPIKE */ static void optimize(node *n) { node *tmp1, *tmp2, *tmp3; INT32 save_line = lex.current_line; #ifdef PIKE_DEBUG struct pike_string *save_file = lex.current_file; #endif /* PIKE_DEBUG */ do { if(car_is_node(n) && ((CAR(n)->node_info & (OPT_OPTIMIZED|OPT_DEFROSTED)) != OPT_OPTIMIZED)) { CAR(n)->parent = n; n = CAR(n); continue; } if(cdr_is_node(n) && ((CDR(n)->node_info & (OPT_OPTIMIZED|OPT_DEFROSTED)) != OPT_OPTIMIZED)) { CDR(n)->parent = n; n = CDR(n); continue; } #if defined(SHARED_NODES) if ((n->node_info & OPT_DEFROSTED) && (n->parent)) { #ifndef IN_TPIKE /* Add ref since both freeze_node() and use_tmp1 will free it. */ ADD_NODE_REF(n); /* We don't want freeze_node() to find this node in the hash-table. */ tmp1 = freeze_node(n); if (tmp1 != n) { /* n was a duplicate node. Use the original. */ /* Make sure the original isn't defrosted too. */ tmp1->node_info &= ~OPT_DEFROSTED; goto use_tmp1; } /* Remove the extra ref from n */ free_node(n); #endif /* !IN_TPIKE */ n->node_info &= ~OPT_DEFROSTED; if (n->node_info & OPT_OPTIMIZED) { /* No need to check this node any more. */ n = n->parent; continue; } } #endif /* SHARED_NODES && !IN_TPIKE */ lex.current_line = n->line_number; #ifdef PIKE_DEBUG lex.current_file = n->current_file; #endif /* PIKE_DEBUG */ #ifdef SHARED_NODES if (n->tree_info & OPT_NOT_SHARED) { n->tree_info = n->node_info; if(car_is_node(n)) n->tree_info |= CAR(n)->tree_info; if(cdr_is_node(n)) n->tree_info |= CDR(n)->tree_info; if(!(n->tree_info & OPT_NOT_SHARED)) { /* We need to fix the hash for this node. */ n->hash = hash_node(n); /* FIXME: Should probably add the node to the hashtable here. */ } } else { #endif /* SHARED_NODES */ n->tree_info = n->node_info; if(car_is_node(n)) n->tree_info |= CAR(n)->tree_info; if(cdr_is_node(n)) n->tree_info |= CDR(n)->tree_info; #ifdef SHARED_NODES if (n->tree_info & OPT_NOT_SHARED) { /* No need to have it in the hashtable anymore. */ sub_node(n); } } #endif /* SHARED_NODES */ if(!n->parent) break; if(n->tree_info & (OPT_NOT_CONST| OPT_SIDE_EFFECT| OPT_EXTERNAL_DEPEND| OPT_ASSIGNMENT| OPT_RETURN)) { if(car_is_node(n) && !(CAR(n)->tree_info & (OPT_NOT_CONST| OPT_SIDE_EFFECT| OPT_EXTERNAL_DEPEND| OPT_ASSIGNMENT| OPT_RETURN)) && (CAR(n)->tree_info & OPT_TRY_OPTIMIZE) && CAR(n)->token != ':') { #ifdef SHARED_NODES sub_node(n); #endif /* SHARED_NODES */ _CAR(n) = eval(CAR(n)); #ifdef SHARED_NODES n->node_info |= OPT_DEFROSTED; if (!(n->tree_info & OPT_NOT_SHARED)) { n->hash = hash_node(n); add_node(n); } #endif /* SHARED_NODES */ if(CAR(n)) CAR(n)->parent = n; zapp_try_optimize(CAR(n)); /* avoid infinite loops */ continue; } if(cdr_is_node(n) && !(CDR(n)->tree_info & (OPT_NOT_CONST| OPT_SIDE_EFFECT| OPT_EXTERNAL_DEPEND| OPT_ASSIGNMENT| OPT_RETURN)) && (CDR(n)->tree_info & OPT_TRY_OPTIMIZE) && CDR(n)->token != ':') { #ifdef SHARED_NODES sub_node(n); #endif /* SHARED_NODES */ _CDR(n) = eval(CDR(n)); #ifdef SHARED_NODES n->node_info |= OPT_DEFROSTED; if (!(n->tree_info & OPT_NOT_SHARED)) { n->hash = hash_node(n); add_node(n); } #endif /* SHARED_NODES */ if(CDR(n)) CDR(n)->parent = n; zapp_try_optimize(CDR(n)); /* avoid infinite loops */ continue; } } if (!n->type || (n->node_info & OPT_TYPE_NOT_FIXED)) { fix_type_field(n); } debug_malloc_touch(n->type); #ifdef PIKE_DEBUG if(l_flag > 3 && n) { fprintf(stderr,"Optimizing (tree info=%04x):",n->tree_info); print_tree(n); } #endif #ifndef IN_TPIKE switch(n->token) { #include "treeopt.h" use_car: ADD_NODE_REF2(CAR(n), tmp1 = CAR(n)); goto use_tmp1; use_cdr: ADD_NODE_REF2(CDR(n), tmp1 = CDR(n)); goto use_tmp1; zap_node: tmp1 = 0; goto use_tmp1; use_tmp1: #ifdef PIKE_DEBUG if (l_flag > 4) { fprintf(stderr, "Optimized: "); print_tree(n); fprintf(stderr, "Result: "); print_tree(tmp1); } #endif /* PIKE_DEBUG */ #ifdef SHARED_NODES sub_node(n->parent); #endif /* SHARED_NODES */ if(CAR(n->parent) == n) _CAR(n->parent) = tmp1; else _CDR(n->parent) = tmp1; if (!tmp1 || (tmp1->type != n->type)) { n->parent->node_info |= OPT_TYPE_NOT_FIXED; } #ifdef SHARED_NODES n->parent->node_info |= OPT_DEFROSTED; if (!(n->tree_info & OPT_NOT_SHARED)) { n->parent->hash = hash_node(n->parent); add_node(n->parent); } #endif /* SHARED_NODES */ if(tmp1) tmp1->parent = n->parent; else tmp1 = n->parent; free_node(n); n = tmp1; #ifdef PIKE_DEBUG if(l_flag > 3) { fprintf(stderr,"Result: "); print_tree(n); } #endif continue; } #endif /* !IN_TPIKE */ n->node_info |= OPT_OPTIMIZED; n=n->parent; }while(n); lex.current_line = save_line; #ifdef PIKE_DEBUG lex.current_file = save_file; #endif /* PIKE_DEBUG */ } void optimize_node(node *n) { if(n && !Pike_compiler->num_parse_error && Pike_compiler->compiler_pass==2 && (n->node_info & OPT_TRY_OPTIMIZE)) { optimize(n); check_tree(n,0); } } struct timer_oflo { INT32 counter; int yes; }; static void check_evaluation_time(struct callback *cb,void *tmp,void *ignored) { struct timer_oflo *foo=(struct timer_oflo *)tmp; if(foo->counter-- < 0) { foo->yes=1; pike_throw(); } } ptrdiff_t eval_low(node *n) { unsigned INT16 num_strings, num_constants; INT32 jump; struct svalue *save_sp = Pike_sp; ptrdiff_t ret; #ifdef PIKE_DEBUG if(l_flag > 3 && n) { fprintf(stderr,"Evaluating (tree info=%x):",n->tree_info); print_tree(n); } #endif if(Pike_compiler->num_parse_error) return -1; num_strings=Pike_compiler->new_program->num_strings; num_constants=Pike_compiler->new_program->num_constants; jump = DO_NOT_WARN((INT32)PC); store_linenumbers=0; docode(dmalloc_touch(node *, n)); ins_f_byte(F_DUMB_RETURN); store_linenumbers=1; ret=-1; if(!Pike_compiler->num_parse_error) { struct callback *tmp_callback; struct timer_oflo foo; /* This is how long we try to optimize before giving up... */ foo.counter=10000; foo.yes=0; tmp_callback=add_to_callback(&evaluator_callbacks, check_evaluation_time, (void *)&foo,0); if(apply_low_safe_and_stupid(Pike_compiler->fake_object, jump)) { /* Generate error message */ if(!Pike_compiler->catch_level) { if(throw_value.type == T_ARRAY && throw_value.u.array->size) { union anything *a; a=low_array_get_item_ptr(throw_value.u.array, 0, T_STRING); if(a) { yyerror(a->string->str); }else{ yyerror("Nonstandard error format."); } } else if(throw_value.type == T_OBJECT) { ref_push_object(throw_value.u.object); push_int(0); f_index(2); if(Pike_sp[-1].type != T_STRING) yyerror("Nonstandard error format."); else yyerror(Pike_sp[-1].u.string->str); pop_stack(); } else { yyerror("Nonstandard error format."); } } free_svalue(&throw_value); throw_value.type = T_INT; }else{ if(foo.yes) pop_n_elems(Pike_sp-save_sp); else ret=Pike_sp-save_sp; } remove_callback(tmp_callback); } while(Pike_compiler->new_program->num_strings > num_strings) { Pike_compiler->new_program->num_strings--; free_string(Pike_compiler->new_program->strings[Pike_compiler->new_program->num_strings]); } while(Pike_compiler->new_program->num_constants > num_constants) { struct program_constant *p_const; Pike_compiler->new_program->num_constants--; p_const = Pike_compiler->new_program->constants + Pike_compiler->new_program->num_constants; free_svalue(&p_const->sval); if (p_const->name) { free_string(p_const->name); p_const->name = NULL; } } Pike_compiler->new_program->num_program=jump; return ret; } static node *eval(node *n) { node *new; ptrdiff_t args; if(!is_const(n) || n->token==':') return n; args=eval_low(n); switch(args) { case -1: return n; break; case 0: if(Pike_compiler->catch_level) return n; free_node(n); n=0; break; case 1: if(Pike_compiler->catch_level && IS_ZERO(Pike_sp-1)) { pop_stack(); return n; } if (n->token == F_SOFT_CAST) { new = mksoftcastnode(n->type, mksvaluenode(Pike_sp-1)); } else { new = mksvaluenode(Pike_sp-1); if (n->type && (!new->type || ((n->type != new->type) && pike_types_le(n->type,new->type)))) { if (new->type) free_type(new->type); copy_pike_type(new->type, n->type); } } free_node(n); n = new; pop_stack(); break; default: if (n->token != F_SOFT_CAST) { free_node(n); n=NULL; while(args--) { n=mknode(F_ARG_LIST,mksvaluenode(Pike_sp-1),n); pop_stack(); } } else { node *nn = n; n = NULL; while(args--) { n=mknode(F_ARG_LIST,mksvaluenode(Pike_sp-1),n); pop_stack(); } n = mksoftcastnode(nn->type, n); free_node(nn); } } return dmalloc_touch(node *, n); } INT32 last_function_opt_info; /* FIXME: Ought to use parent pointer to avoid recursion. */ static int stupid_args(node *n, int expected,int vargs) { if(!n) return expected; fatal_check_c_stack(16384); switch(n->token) { case F_PUSH_ARRAY: if(!vargs) return -1; if(stupid_args(CAR(n), expected,vargs) == expected+1) return 65535; return -1; case F_ARG_LIST: expected=stupid_args(CAR(n), expected,vargs); if(expected==-1) return -1; return stupid_args(CDR(n), expected,vargs); case F_LOCAL: return (!n->u.integer.b && n->u.integer.a==expected) ? expected + 1 : -1; default: return -1; } } /* FIXME: Ought to use parent pointer to avoid recursion. */ static int is_null_branch(node *n) { if(!n) return 1; fatal_check_c_stack(16384); if((n->token==F_CAST && n->type == void_type_string) || n->token == F_POP_VALUE) return is_null_branch(CAR(n)); if(n->token==F_ARG_LIST) return is_null_branch(CAR(n)) && is_null_branch(CDR(n)); return 0; } static struct svalue *is_stupid_func(node *n, int args, int vargs, struct pike_type *type) { node *a,*b; int tmp; while(1) { if(!n) return 0; if(n->token == F_ARG_LIST) { if(is_null_branch(CAR(n))) n=CDR(n); else n=CAR(n); continue; } if((n->token == F_CAST && n->type == void_type_string) || n->token == F_POP_VALUE) { n=CAR(n); continue; } break; } if(!n || n->token != F_RETURN) return 0; n=CAR(n); if(!n || n->token != F_APPLY) return 0; tmp=stupid_args(CDR(n),0,vargs); if(!(vargs?tmp==65535:tmp==args)) return 0; n=CAR(n); if(!n || n->token != F_CONSTANT) return 0; if((count_arguments(n->type) < 0) == !vargs) return 0; if(minimum_arguments(type) < minimum_arguments(n->type)) return 0; return &n->u.sval; } int dooptcode(struct pike_string *name, node *n, struct pike_type *type, int modifiers) { union idptr tmp; int args, vargs, ret; struct svalue *foo; optimize_node(n); check_tree(check_node_hash(n),0); #ifdef PIKE_DEBUG if(a_flag > 1) fprintf(stderr, "Doing function '%s' at %lx\n", name->str, DO_NOT_WARN((unsigned long)PC)); #endif args=count_arguments(type); if(args < 0) { args=~args; vargs=IDENTIFIER_VARARGS; }else{ vargs=0; } if(Pike_compiler->compiler_frame->lexical_scope & SCOPE_SCOPED) vargs|=IDENTIFIER_SCOPED; if(Pike_compiler->compiler_frame->lexical_scope & SCOPE_SCOPE_USED) vargs|=IDENTIFIER_SCOPE_USED; if(Pike_compiler->compiler_pass==1) { tmp.offset=-1; #ifdef PIKE_DEBUG if(a_flag > 4) { fprintf(stderr,"Making prototype (pass 1) for: "); print_tree(n); } #endif }else{ #if defined(SHARED_NODES) && !defined(IN_TPIKE) && 0 /* Try the local variable usage analyser. */ n = localopt(check_node_hash(n)); /* Try optimizing some more. */ optimize(n); #endif /* SHARED_NODES && !IN_TPIKE */ n = mknode(F_ARG_LIST,check_node_hash(n),0); if((foo=is_stupid_func(check_node_hash(n), args, vargs, type))) { if(foo->type == T_FUNCTION && foo->subtype==FUNCTION_BUILTIN) { tmp.c_fun=foo->u.efun->function; if(tmp.c_fun != f_destruct && tmp.c_fun != f_this_object && tmp.c_fun != f_backtrace) { #ifdef PIKE_DEBUG if(a_flag > 1) fprintf(stderr,"%s:%d: IDENTIFIER OPTIMIZATION %s == %s\n", lex.current_file->str, lex.current_line, name->str, foo->u.efun->name->str); #endif ret=define_function(name, type, (unsigned INT8)modifiers, (unsigned INT8)(IDENTIFIER_C_FUNCTION | vargs), &tmp, foo->u.efun->flags); free_node(n); return ret; } } } tmp.offset=PC; Pike_compiler->compiler_frame->num_args=args; #ifdef PIKE_DEBUG if(a_flag > 2) { fprintf(stderr,"Coding: "); print_tree(check_node_hash(n)); } #endif if(!Pike_compiler->num_parse_error) { extern int remove_clear_locals; remove_clear_locals=args; if(vargs) remove_clear_locals++; do_code_block(check_node_hash(n)); remove_clear_locals=0x7fffffff; } } ret=define_function(name, type, (unsigned INT8)modifiers, (unsigned INT8)(IDENTIFIER_PIKE_FUNCTION | vargs), Pike_compiler->num_parse_error?NULL:&tmp, (unsigned INT16) (Pike_compiler->compiler_frame->opt_flags)); #ifdef PIKE_DEBUG if(a_flag > 1) fprintf(stderr,"Identifer = %d\n",ret); #endif free_node(n); return ret; }

pike.git/ src/ las.c > 40f524145d9abdfbdf0ead16eb181ee26da25690 [Annotate]