pike.git/src/las.c:1283985d39d289da0a13023806ba9cc00a366ea5

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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 /* || This file is part of Pike. For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. */ #include "global.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 "opcodes.h" #include "pikecode.h" #include "gc.h" #include "pike_compiler.h" #include "block_allocator.h" /* Define this if you want the optimizer to be paranoid about aliasing * effects to to indexing. */ /* #define PARANOID_INDEXING */ static node *eval(node *); static void optimize(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_GET_SET: case F_TRAMPOLINE: case F_CONSTANT: case F_LOCAL: case F_THIS: case F_VERSION: return 0; default: return !!_CAR(n); } } int cdr_is_node(node *n) { switch(n->token) { case F_EXTERNAL: case F_GET_SET: case F_TRAMPOLINE: case F_CONSTANT: case F_LOCAL: case F_THIS: case F_VERSION: return 0; default: return !!_CDR(n); } } int node_is_leaf(node *n) { switch(n->token) { case F_EXTERNAL: case F_GET_SET: case F_TRAMPOLINE: case F_CONSTANT: case F_LOCAL: case F_VERSION: 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) Pike_fatal("Free node in tree.\n"); switch(n->token) { case F_EXTERNAL: case F_GET_SET: 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 && id_no != IDREF_MAGIC_THIS) { struct identifier *id = ID_FROM_INT(state->new_program, id_no); if (id) { #if 0 #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) { fputs("Type of external node " "is not matching its identifier.\nid->type: ",stderr); simple_describe_type(id->type); fputs("\nn->type : ", stderr); simple_describe_type(n->type); fputc('\n', stderr); Pike_fatal("Type of external node is not matching its identifier.\n"); } #endif #endif } } } } if(d_flag<2) break; #ifdef PIKE_DEBUG if(!(depth & 1023)) { node *q; for(q=n->parent;q;q=q->parent) if(q->parent==n) Pike_fatal("Cyclic node structure found.\n"); } #endif if(car_is_node(n)) { /* Update parent for CAR */ CAR(n)->parent = n; depth++; n = CAR(n); continue; } if(cdr_is_node(n)) { /* Update parent for CDR */ CDR(n)->parent = n; 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 */ CDR(n->parent)->parent = n->parent; n = CDR(n->parent); continue; } break; } if (n != orig_n) { fputs("check_tree() lost track.\n", stderr); d_flag = 0; fputs("n:", stderr); print_tree(n); fputs("orig_n:", stderr); print_tree(orig_n); Pike_fatal("check_tree() lost track.\n"); } n->parent = parent; } #endif static int low_count_args(node *n) { int a,b; 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; return count_args(CAR(n)); case F_SOFT_CAST: return count_args(CAR(n)); case F_CASE: case F_CASE_RANGE: 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 < tmp2) return tmp1; return tmp2; } case F_PUSH_ARRAY: return -1; case F_APPLY: if(CAR(n)->token == F_CONSTANT && TYPEOF(CAR(n)->u.sval) == T_FUNCTION && SUBTYPEOF(CAR(n)->u.sval) == FUNCTION_BUILTIN && n->type == void_type_string) return 0; return 1; case F_RANGE_FROM_BEG: case F_RANGE_FROM_END: return 1; case F_RANGE_OPEN: return 0; default: if(n->type == void_type_string) return 0; return 1; } UNREACHABLE(); } INT32 count_args(node *n) { int total = 0; int a,b; node *orig = n; node *orig_parent; node *prev = NULL; check_tree(n,0); fatal_check_c_stack(16384); if(!n) return 0; orig_parent = n->parent; n->parent = NULL; while(1) { int val; while ((n->token == F_COMMA_EXPR) || (n->token == F_VAL_LVAL) || (n->token == F_ARG_LIST)) { if (CAR(n)) { CAR(n)->parent = n; n = CAR(n); } else if (CDR(n)) { CDR(n)->parent = n; n = CDR(n); } else { /* Unlikely, but... */ goto backtrack; } } /* Leaf. */ val = low_count_args(n); if (val == -1) { total = -1; break; } if (n->parent && (CAR(n->parent) == CDR(n->parent))) { /* Same node in both CDR and CAR ==> count twice. */ val *= 2; } total += val; backtrack: while (n->parent && (!CDR(n->parent) || (n == CDR(n->parent)))) { n = n->parent; } if (!(n = n->parent)) break; /* Found a parent where we haven't visited CDR. */ CDR(n)->parent = n; n = CDR(n); } orig->parent = orig_parent; return total; } /* 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; optimize(n); 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) { fputs("Return with untyped argument.\n", stderr); 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 (Pike_compiler->compiler_frame->lexical_scope & SCOPE_SCOPE_USED) { /* There might be a lambda around that has references to the old context * in which case we can't reuse it with a tail-recursive call. */ return 0; } 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; } static int check_node_type(node *n, struct pike_type *t, const char *msg) { if (pike_types_le(n->type, t)) return 1; if (!match_types(n->type, t)) { yytype_report(REPORT_ERROR, NULL, 0, t, NULL, 0, n->type, 0, msg); return 0; } if (THIS_COMPILATION->lex.pragmas & ID_STRICT_TYPES) { yytype_report(REPORT_WARNING, NULL, 0, t, NULL, 0, n->type, 0, msg); } if (runtime_options & RUNTIME_CHECK_TYPES) { node *p = n->parent; if (CAR(p) == n) { (_CAR(p) = mksoftcastnode(t, mkcastnode(mixed_type_string, n))) ->parent = p; } else if (CDR(p) == n) { (_CDR(p) = mksoftcastnode(t, mkcastnode(mixed_type_string, n))) ->parent = p; } else { yywarning("Failed to find place to insert soft cast."); } } return 1; } void init_node_s_blocks() { } void really_free_node_s(node * n) { ba_free(&Pike_compiler->node_allocator, n); } MALLOC_FUNCTION node * alloc_node_s() { return ba_alloc(&Pike_compiler->node_allocator); } void count_memory_in_node_ss(size_t * num, size_t * size) { struct program_state * state = Pike_compiler; *num = 0; *size = 0; while (state) { size_t _num, _size; ba_count_all(&state->node_allocator, &_num, &_size); *num += _num; *size += _size; state = state->previous; } } void node_walker(struct ba_iterator * it, void * UNUSED(data)) { do { node * tmp = ba_it_val(it); /* * since we free nodes from here, we might iterate over them again. * to avoid that we check for the free mark. */ if (tmp->token == USHRT_MAX) continue; #ifdef PIKE_DEBUG if(!cumulative_parse_error) { fprintf(stderr,"Free node at %p, (%s:%ld) (token=%d).\n", (void *)tmp, tmp->current_file->str, (long)tmp->line_number, tmp->token); debug_malloc_dump_references(tmp,0,2,0); if(tmp->token==F_CONSTANT) print_tree(tmp); } /* else */ #endif { /* 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 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; debug_malloc_touch(tmp->type); free_node(tmp); } } while (ba_it_step(it)); } void free_all_nodes(void) { node *tmp; #ifndef PIKE_DEBUG if(cumulative_parse_error) { #endif ba_walk(&Pike_compiler->node_allocator, &node_walker, NULL); #ifdef PIKE_DEBUG if(!cumulative_parse_error) { size_t n, s; ba_count_all(&Pike_compiler->node_allocator, &n, &s); if (n) Pike_fatal("Failed to free %"PRINTSIZET"d nodes when compiling!\n",n); } #else } #endif cumulative_parse_error=0; } void debug_free_node(node *n) { if(!n) return; if (sub_ref(n)) { #ifdef PIKE_DEBUG if(l_flag>9) print_tree(n); #endif /* PIKE_DEBUG */ return; } n->parent = NULL; do { #ifdef PIKE_DEBUG if(l_flag>9) print_tree(n); #endif /* PIKE_DEBUG */ debug_malloc_touch(n); #ifdef PIKE_DEBUG if (n->refs) { Pike_fatal("Node with refs left about to be killed: %8p\n", n); } #endif /* PIKE_DEBUG */ switch(n->token) { case USHRT_MAX: Pike_fatal("Freeing node again!\n"); break; case F_CONSTANT: free_svalue(&(n->u.sval)); break; } if (car_is_node(n)) { /* Free CAR */ if (sub_ref(_CAR(n))) { _CAR(n) = NULL; } else { _CAR(n)->parent = n; n = _CAR(n); _CAR(n->parent) = NULL; continue; } } if (cdr_is_node(n)) { /* Free CDR */ if (sub_ref(_CDR(n))) { _CDR(n) = NULL; } else { _CDR(n)->parent = n; n = _CDR(n); _CDR(n->parent) = NULL; continue; } } backtrack: while (n->parent && !cdr_is_node(n->parent)) { /* Kill the node and backtrack */ node *dead = n; #ifdef PIKE_DEBUG if (dead->refs) { print_tree(dead); Pike_fatal("Killed node %p (%d) still has refs: %d\n", dead, dead->token, dead->refs); } #endif /* PIKE_DEBUG */ n = n->parent; if(dead->type) free_type(dead->type); if(dead->name) free_string(dead->name); if(dead->current_file) free_string(dead->current_file); 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; #ifdef PIKE_DEBUG if (dead->refs) { Pike_fatal("Killed node %p still has refs: %d\n", dead, dead->refs); } #endif /* PIKE_DEBUG */ n = n->parent; if(dead->type) free_type(dead->type); if(dead->name) free_string(dead->name); if(dead->current_file) free_string(dead->current_file); dead->token=USHRT_MAX; really_free_node_s(dead); if (sub_ref(_CDR(n))) { _CDR(n) = NULL; goto backtrack; } else { _CDR(n)->parent = n; n = _CDR(n); _CDR(n->parent) = NULL; continue; } } /* Kill root node. */ #ifdef PIKE_DEBUG if (n->refs) { Pike_fatal("Killed node %p still has refs: %d\n", n, n->refs); } #endif /* PIKE_DEBUG */ if(n->type) free_type(n->type); if(n->name) free_string(n->name); if(n->current_file) free_string(n->current_file); n->token=USHRT_MAX; really_free_node_s(n); break; } while (n->parent); } /* here starts routines to make nodes */ static node *debug_mkemptynode(void) { node *res=alloc_node_s(); CHECK_COMPILER(); #ifdef __CHECKER__ memset(res, 0, sizeof(node)); #endif /* __CHECKER__ */ res->refs = 0; add_ref(res); /* For DMALLOC... */ res->token=0; res->line_number=THIS_COMPILATION->lex.current_line; copy_shared_string(res->current_file, THIS_COMPILATION->lex.current_file); 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()) static int is_automap_arg_list(node *n) { if(!n) return 0; switch(n->token) { default: return 0; case F_ARG_LIST: return is_automap_arg_list(CAR(n)) || is_automap_arg_list(CDR(n)); case F_AUTO_MAP_MARKER: return 1; } } node *debug_mknode(int token, node *a, node *b) { node *res; switch(token) { case F_APPLY: if(is_automap_arg_list(b)) token=F_AUTO_MAP; break; case F_INDEX: switch((is_automap_arg_list(a) << 1) | is_automap_arg_list(b)) { case 1: res=mkefuncallnode("rows",mknode(F_ARG_LIST,a,copy_node(CAR(b)))); free_node(b); return res; case 2: res=mkefuncallnode("column",mknode(F_ARG_LIST,copy_node(CAR(a)),b)); free_node(a); return res; case 3: return mkefuncallnode("`[]",mknode(F_ARG_LIST,a,b)); } break; #ifdef PIKE_DEBUG case F_CAST: case F_SOFT_CAST: Pike_fatal("Attempt to create a cast-node with mknode()!\n"); case F_CONSTANT: Pike_fatal("Attempt to create an F_CONSTANT-node with mknode()!\n"); case F_LOCAL: Pike_fatal("Attempt to create an F_LOCAL-node with mknode()!\n"); case F_TRAMPOLINE: Pike_fatal("Attempt to create an F_TRAMPOLINE-node with mknode()!\n"); case F_EXTERNAL: Pike_fatal("Attempt to create an F_EXTERNAL-node with mknode()!\n"); case F_GET_SET: Pike_fatal("Attempt to create an F_GET_SET-node with mknode()!\n"); #endif /* PIKE_DEBUG */ #define OPERNODE(X,Y) case X: return mkopernode(("`" #Y), a, b ) OPERNODE(F_LT,<); OPERNODE(F_GT,>); OPERNODE(F_LE,<=); OPERNODE(F_GE,>=); OPERNODE(F_EQ,==); OPERNODE(F_NE,!=); OPERNODE(F_ADD,+); OPERNODE(F_SUBTRACT,-); OPERNODE(F_DIVIDE,/); OPERNODE(F_MULTIPLY,*); OPERNODE(F_MOD,%); OPERNODE(F_LSH,<<); OPERNODE(F_RSH,>>); OPERNODE(F_OR,|); OPERNODE(F_AND,&); OPERNODE(F_XOR,^); OPERNODE(F_NOT,!); OPERNODE(F_COMPL,~); #if 0 OPERNODE(F_NEGATE,-); #endif #undef OPERNODE } check_tree(a,0); check_tree(b,0); res = mkemptynode(); _CAR(res) = dmalloc_touch(node *, a); _CDR(res) = dmalloc_touch(node *, b); 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_AUTO_MAP: 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(TYPEOF(a->u.sval)) { case T_FUNCTION: if (SUBTYPEOF(a->u.sval) == 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, SUBTYPEOF(a->u.sval)); } else { yyerror("Calling function in destructed module."); } break; case T_PROGRAM: if(a->u.sval.u.program->flags & PROGRAM_CONSTANT) { opt_flags=0; } if (a->u.sval.u.program->flags & PROGRAM_USES_PARENT) { yyerror("Can not clone program without parent context."); } break; } break; case F_EXTERNAL: case F_GET_SET: if (a->u.integer.b != IDREF_MAGIC_THIS) { 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: case F_MAGIC_INDICES: case F_MAGIC_VALUES: case F_MAGIC_TYPES: { int e; struct program_state *state = Pike_compiler; res->node_info |= OPT_EXTERNAL_DEPEND; if (!b) break; /* Paranoia; probably compiler error. */ 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: case F_CASE_RANGE: 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_APPEND_ARRAY: case F_APPEND_MAPPING: case F_MULTI_ASSIGN: case F_ASSIGN: case F_ASSIGN_SELF: 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; case ':': case F_RANGE_FROM_BEG: case F_RANGE_FROM_END: case F_RANGE_OPEN: res->node_info |= OPT_FLAG_NODE; 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 PIKE_DEBUG if(d_flag > 3) verify_shared_strings_tables(); #endif check_tree(res,0); #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; SET_SVAL(res->u.sval, T_STRING, 0, string, str); add_ref(str); res->type = get_type_of_svalue(&res->u.sval); res->tree_info = OPT_SAFE; return res; } node *debug_mkintnode(INT_TYPE nr) { node *res = mkemptynode(); res->token = F_CONSTANT; SET_SVAL(res->u.sval, T_INT, NUMBER_NUMBER, integer, nr); res->type=get_type_of_svalue( & res->u.sval); res->tree_info = OPT_SAFE; return res; } node *debug_mknewintnode(INT_TYPE nr) { node *res = mkemptynode(); res->token = F_CONSTANT; SET_SVAL(res->u.sval, T_INT, NUMBER_NUMBER, integer, nr); res->type=get_type_of_svalue( & res->u.sval); res->tree_info = OPT_SAFE; return res; } node *debug_mkfloatnode(FLOAT_TYPE foo) { node *res = mkemptynode(); res->token = F_CONSTANT; copy_pike_type(res->type, float_type_string); SET_SVAL(res->u.sval, T_FLOAT, 0, float_number, foo); res->tree_info = OPT_SAFE; return res; } node *debug_mkprgnode(struct program *p) { struct svalue s; SET_SVAL(s, T_PROGRAM, 0, program, p); 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; /* Force resolving since we don't want to get tangled up in the * placeholder object here. The problem is really that the * placeholder purport itself to contain every identifier, which * makes it hide the real ones in find_module_identifier. This * kludge will fail if the class being placeholded actually contains * these identifiers, but then again I think it's a bit odd in the * first place to look up these efuns in the module being compiled. * Wouldn't it be better if this function consulted * compiler_handler->get_default_module? /mast */ int orig_flags; SET_FORCE_RESOLVE(orig_flags); name = findstring(function); if(!name || !(n=find_module_identifier(name,0))) { UNSET_FORCE_RESOLVE(orig_flags); my_yyerror("Internally used efun undefined: %s",function); return mkintnode(0); } UNSET_FORCE_RESOLVE(orig_flags); 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_mkversionnode(int major, int minor) { node *res = mkemptynode(); res->token = F_VERSION; #ifdef __CHECKER__ _CDR(res) = 0; #endif res->u.integer.a = major; res->u.integer.b = minor; return res; } 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; res->tree_info = res->node_info; #ifdef __CHECKER__ _CDR(res) = 0; #endif res->u.integer.a = var; if (depth < 0) { /* First appearance of this variable. * Add initialization code. */ res->node_info |= OPT_ASSIGNMENT; res->u.integer.b = 0; } else { res->u.integer.b = depth; } return res; } node *debug_mkidentifiernode(int i) { node *res = mkexternalnode(Pike_compiler->new_program, i); check_tree(res,0); return res; } node *debug_mktrampolinenode(int i, struct compiler_frame *frame) { struct compiler_frame *f; 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.trampoline.ident=i; res->u.trampoline.frame=frame; for(f=Pike_compiler->compiler_frame;f != frame;f=f->previous) f->lexical_scope|=SCOPE_SCOPED; f->lexical_scope|=SCOPE_SCOPE_USED; #ifdef SHARED_NODES res->u.trampoline.prog = Pike_compiler->new_program; #endif /* SHARED_NODES */ check_tree(res,0); return res; } node *debug_mkexternalnode(struct program *parent_prog, int i) { #if 0 return mkidentifiernode(add_ext_ref(Pike_compiler, parent_prog, i)); #else /* !0 */ node *res = mkemptynode(); res->token = F_EXTERNAL; if (i == IDREF_MAGIC_THIS) { type_stack_mark(); push_object_type (0, parent_prog->id); res->type = pop_unfinished_type(); res->node_info = OPT_NOT_CONST; Pike_compiler->compiler_frame->opt_flags |= OPT_EXTERNAL_DEPEND; } else { struct identifier *id = ID_FROM_INT(parent_prog, i); #ifdef PIKE_DEBUG if(d_flag) { check_string(id->name); } #endif /* Mark the identifier reference as used. */ PTR_FROM_INT(parent_prog, i)->id_flags |= ID_USED; copy_pike_type(res->type, id->type); /* FIXME: The IDENTIFIER_IS_ALIAS case isn't handled! */ if(IDENTIFIER_IS_CONSTANT(id->identifier_flags)) { if (!(PTR_FROM_INT(parent_prog, i)->id_flags & ID_LOCAL)) { /* It's possible to overload the identifier. */ res->node_info = OPT_EXTERNAL_DEPEND; } else if (id->func.const_info.offset != -1) { struct program *p = PROG_FROM_INT(parent_prog, i); struct svalue *s = &p->constants[id->func.const_info.offset].sval; if ((TYPEOF(*s) == T_PROGRAM) && (s->u.program->flags & PROGRAM_USES_PARENT)) { /* The constant program refers to its parent, so we need as well. */ res->node_info = OPT_EXTERNAL_DEPEND; } } }else{ res->node_info = OPT_NOT_CONST; if (IDENTIFIER_IS_VARIABLE(id->identifier_flags) && (id->run_time_type == PIKE_T_GET_SET)) { /* Special case of F_EXTERNAL for ease of detection. */ res->token = F_GET_SET; } } if (i) { Pike_compiler->compiler_frame->opt_flags |= OPT_EXTERNAL_DEPEND; } } res->tree_info = res->node_info; #ifdef __CHECKER__ _CDR(res) = 0; #endif res->u.integer.a = parent_prog->id; res->u.integer.b = i; #if 0 /* Don't do this if res about to get inherited, since the inherit won't * be affected by later overloading of the inherited class in our parents. */ /* if (!(Pike_compiler->flags & COMPILATION_FORCE_RESOLVE)) { */ /* 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; } /* } */ #endif /* 0 */ return res; #endif /* 0 */ } node *debug_mkthisnode(struct program *parent_prog, int inherit_num) { struct program_state *state; node *res; #ifdef PIKE_DEBUG if ((inherit_num < -1) || (inherit_num > 65535)) { Pike_fatal("This is bad: %p, %d\n", parent_prog, inherit_num); } #endif /* PIKE_DEBUG */ res = mkemptynode(); res->token = F_THIS; type_stack_mark(); if (inherit_num >= 0) { push_object_type(1, parent_prog->inherits[inherit_num].prog->id); } else { push_object_type(0, parent_prog->id); } res->type = pop_unfinished_type(); res->tree_info = res->node_info = OPT_NOT_CONST; #ifdef __CHECKER__ _CDR(res) = 0; #endif res->u.integer.a = parent_prog->id; res->u.integer.b = inherit_num; /* 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; } return res; } node *debug_mkcastnode(struct pike_type *type, node *n) { node *res; if(!n) return 0; #ifdef PIKE_DEBUG if (!type) { Pike_fatal("Casting to no type!\n"); } #endif /* PIKE_DEBUG */ if (type == void_type_string) return mknode(F_POP_VALUE, n, 0); #if 0 /* It's not always safe to ignore the cast in this case. E.g. if n * has type program, the value can contain a function style program * pointer which the cast will turn into a real program * reference. */ if(type==n->type) return n; #endif res = mkemptynode(); res->token = F_CAST; /* FIXME: Consider strengthening the node type [bug 4435]. * E.g. the cast in the code * * mapping(string:string) m = (["a":"A", "b":"B"]); * return (array)m; * * should have a result type of array(array(string)), * rather than array(mixed). */ copy_pike_type(res->type, type); if((type != zero_type_string) && (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 res; } node *debug_mksoftcastnode(struct pike_type *type, node *n) { node *res; struct pike_type *result_type = NULL; if(!n) return 0; #ifdef PIKE_DEBUG if (!type) { Pike_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); free_string(t1); return n; } if (n->type) { if (!(result_type = soft_cast(type, n->type, 0))) { ref_push_type_value(n->type); ref_push_type_value(type); yytype_report(REPORT_ERROR, NULL, 0, type, NULL, 0, n->type, 2, "Soft cast of %O to %O isn't a valid cast."); } else if (result_type == n->type) { ref_push_type_value(n->type); ref_push_type_value(type); yytype_report(REPORT_WARNING, NULL, 0, NULL, NULL, 0, NULL, 2, "Soft cast of %O to %O is a noop."); } } } res = mkemptynode(); res->token = F_SOFT_CAST; if (result_type) { res->type = result_type; } else { copy_pike_type(res->type, type); } res->tree_info |= n->tree_info; _CAR(res) = n; _CDR(res) = mktypenode(type); n->parent = res; return 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: case F_GET_SET: if (n->u.integer.b == IDREF_MAGIC_THIS) { yyerror ("Expected constant, got reference to this"); push_int (0); return; } else { struct program_state *state = Pike_compiler; while (state && (state->new_program->id != n->u.integer.a)) { state = state->previous; } if(!state) { yyerror("Failed to resolve external constant."); push_int(0); return; } p = state->new_program; numid=n->u.integer.b; } 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: { if(is_const(n)) { ptrdiff_t args=eval_low(n,1); 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; } } else { yyerror("Failed to evaluate constant expression."); } } else { yyerror("Expected constant expression."); } 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_ALIAS(i->identifier_flags)) { struct external_variable_context loc; loc.o = Pike_compiler->fake_object; do { loc.inherit = INHERIT_FROM_INT(p, numid); loc.parent_identifier = 0; find_external_context(&loc, i->func.ext_ref.depth); numid = i->func.ext_ref.id; p = loc.o->prog; i = ID_FROM_INT(p, numid); } while (IDENTIFIER_IS_ALIAS(i->identifier_flags)); } if(IDENTIFIER_IS_CONSTANT(i->identifier_flags)) { if(i->func.const_info.offset != -1) { push_svalue(&PROG_FROM_INT(p, numid)-> constants[i->func.const_info.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); push_int(0); } } } /* Leaves a function or object on the stack */ void resolv_class(node *n) { check_tree(n,0); resolv_constant(n); switch(TYPEOF(Pike_sp[-1])) { case T_OBJECT: if(!Pike_sp[-1].u.object->prog) { pop_stack(); push_int(0); }else{ o_cast(program_type_string, T_PROGRAM); } 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) { if (!n) { push_int(0); return; } check_tree(n,0); fix_type_field(n); if (!pike_types_le(n->type, inheritable_type_string) && (THIS_COMPILATION->lex.pragmas & ID_STRICT_TYPES)) { yytype_report(REPORT_WARNING, n->current_file, n->line_number, inheritable_type_string, n->current_file, n->line_number, n->type, 0, "Not a valid object type.\n"); } resolv_class(n); switch(TYPEOF(Pike_sp[-1])) { 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 *index_node(node *n, char *node_name, struct pike_string *id) { node *ret; JMP_BUF tmp; check_tree(n,0); if (!is_const(n)) { /* Index dynamically. */ return mknode(F_INDEX, copy_node(n), mkstrnode(id)); } if(SETJMP(tmp)) { if (node_name) { handle_compile_exception ("Couldn't index module %s.", node_name); } else { handle_compile_exception ("Couldn't index module."); } }else{ resolv_constant(n); switch(TYPEOF(Pike_sp[-1])) { case T_INT: if (!Pike_sp[-1].u.integer) { 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); } else { my_yyerror("Failed to index module with '%S'. " "(Module doesn't exist?)", id); } } break; } /* Fall through. */ case T_FLOAT: case T_STRING: case T_ARRAY: if (node_name) { my_yyerror("Failed to index module %s, got %s. (Not a module?)", node_name, get_name_of_type (TYPEOF(Pike_sp[-1]))); } else { my_yyerror("Failed to index a module, got %s. (Not a module?)", get_name_of_type (TYPEOF(Pike_sp[-1]))); } pop_stack(); push_int(0); break; case T_OBJECT: case T_PROGRAM: if(!(Pike_compiler->new_program->flags & PROGRAM_PASS_1_DONE)) { struct program *p; if(TYPEOF(Pike_sp[-1]) == T_OBJECT) p=Pike_sp[-1].u.object->prog; else p=Pike_sp[-1].u.program; if(p && !(p->flags & PROGRAM_PASS_1_DONE)) { if(report_compiler_dependency(p)) { pop_stack(); #if 0 fprintf(stderr, "Placeholder deployed for %p when indexing ", p); print_tree(n); fprintf(stderr, "with %s\n", id->str); #endif ref_push_object(placeholder_object); break; } } } default: { ptrdiff_t c; DECLARE_CYCLIC(); c = PTR_TO_INT(BEGIN_CYCLIC(Pike_sp[-1].u.refs, id)); if(c>1) { my_yyerror("Recursive module dependency when indexing with '%S'.", id); pop_stack(); push_int(0); }else{ volatile int exception = 0; SET_CYCLIC_RET(c+1); ref_push_string(id); { JMP_BUF recovery; STACK_LEVEL_START(2); if (SETJMP_SP(recovery, 2)) { if (node_name) { handle_compile_exception ("Error looking up '%S' in module %s.", id, node_name); } else { handle_compile_exception ("Error looking up '%S' in module.", id); } push_undefined(); exception = 1; } else { f_index(2); } STACK_LEVEL_DONE(1); UNSETJMP(recovery); } if(TYPEOF(Pike_sp[-1]) == T_INT && !Pike_sp[-1].u.integer && SUBTYPEOF(Pike_sp[-1]) == NUMBER_UNDEFINED) { if(Pike_compiler->new_program->flags & PROGRAM_PASS_1_DONE) { if (!exception) { struct compilation *c = THIS_COMPILATION; if (node_name) { my_yyerror("Index '%S' not present in module %s.", id, node_name); } else { my_yyerror("Index '%S' not present in module.", id); } resolv_constant(n); low_yyreport(REPORT_ERROR, NULL, 0, parser_system_string, 1, "Indexed module was: %O."); } }else if (!(Pike_compiler->flags & COMPILATION_FORCE_RESOLVE)) { /* Hope it's there in pass 2 */ pop_stack(); #if 0 fprintf(stderr, "Placeholder deployed when indexing "); print_tree(n); fprintf(stderr, "with %s\n", id->str); #endif ref_push_object(placeholder_object); } } else if (Pike_compiler->new_program->flags & PROGRAM_PASS_1_DONE) { if (((TYPEOF(Pike_sp[-1]) == T_OBJECT && Pike_sp[-1].u.object == placeholder_object) || (TYPEOF(Pike_sp[-1]) == T_PROGRAM && Pike_sp[-1].u.program == placeholder_program)) && /* Ugly special case: We must be able to get * predef::__placeholder_object. */ (!node_name || strcmp (node_name, "predef"))) { if (node_name) my_yyerror("Got placeholder %s when indexing " "module %s with '%S'. (Resolver problem.)", get_name_of_type (TYPEOF(Pike_sp[-1])), node_name, id); else my_yyerror("Got placeholder %s when indexing " "module with '%S'. (Resolver problem.)", get_name_of_type (TYPEOF(Pike_sp[-1])), id); } } else { /* If we get a program that hasn't gone through pass 1 yet * then we have to register a dependency now in our pass 1 * so that our pass 2 gets delayed. Otherwise the other * program might still be just as unfinished when we come * back here in pass 2. */ struct program *p = NULL; if (TYPEOF(Pike_sp[-1]) == T_PROGRAM) p = Pike_sp[-1].u.program; else if (TYPEOF(Pike_sp[-1]) == T_OBJECT || (TYPEOF(Pike_sp[-1]) == T_FUNCTION && SUBTYPEOF(Pike_sp[-1]) != FUNCTION_BUILTIN)) p = Pike_sp[-1].u.object->prog; if (p && !(p->flags & PROGRAM_PASS_1_DONE)) report_compiler_dependency (p); } } 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_TRAMPOLINE: /* FIXME, the context has to be the same! */ #ifdef SHARED_NODES if(a->u.trampoline.prog != b->u.trampoline.prog) return 0; #endif return a->u.trampoline.ident == b->u.trampoline.ident && a->u.trampoline.frame == b->u.trampoline.frame; case F_EXTERNAL: case F_GET_SET: case F_LOCAL: return a->u.integer.a == b->u.integer.a && a->u.integer.b == b->u.integer.b; 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; SET_SVAL(res->u.sval, T_TYPE, 0, type, t); add_ref(t); /* FIXME: Should be type(val) */ type_stack_mark(); push_finished_type(t); push_type(T_TYPE); res->type = pop_unfinished_type(); return res; } node *low_mkconstantsvaluenode(const struct svalue *s) { node *res = mkemptynode(); res->token = F_CONSTANT; assign_svalue_no_free(& res->u.sval, s); if(TYPEOF(*s) == T_OBJECT || (TYPEOF(*s) == T_FUNCTION && SUBTYPEOF(*s) != 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); res->tree_info |= OPT_SAFE; return res; } node *debug_mkconstantsvaluenode(const struct svalue *s) { return low_mkconstantsvaluenode(s); } node *debug_mkliteralsvaluenode(const struct svalue *s) { node *res = low_mkconstantsvaluenode(s); if(TYPEOF(*s) != T_STRING && TYPEOF(*s) != T_INT && TYPEOF(*s) != T_FLOAT) res->node_info|=OPT_EXTERNAL_DEPEND; return res; } node *debug_mksvaluenode(struct svalue *s) { switch(TYPEOF(*s)) { 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: #ifdef PIKE_DEBUG if (s->u.object->prog == placeholder_program && Pike_compiler->compiler_pass == 2) Pike_fatal("Got placeholder object in second pass.\n"); #endif 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(SUBTYPEOF(*s) != FUNCTION_BUILTIN) { if(s->u.object == Pike_compiler->fake_object) return mkidentifiernode(SUBTYPEOF(*s)); if(s->u.object->next == s->u.object) { return mkexternalnode(s->u.object->prog, SUBTYPEOF(*s)); } /* yyerror("Non-constant function pointer! (should not happen!)"); */ } } } return mkconstantsvaluenode(s); } /* these routines operates on parsetrees and are mostly used by the * optimizer */ node *copy_node(node *n) { node *b; debug_malloc_touch(n); debug_malloc_touch(n->type); check_tree(n,0); if(!n) return n; switch(n->token) { case F_LOCAL: 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: add_ref(n); return n; } } 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) { if (!(n->tree_info & (OPT_SIDE_EFFECT | OPT_ASSIGNMENT | OPT_CASE | OPT_CONTINUE | OPT_BREAK | OPT_RETURN ))) { ptrdiff_t args; if (n->tree_info & (OPT_NOT_CONST|OPT_SAFE)) return 1; args = eval_low (n, 0); if (args == -1) { n->tree_info |= OPT_SIDE_EFFECT; /* A constant that throws. */ return 0; } else { pop_n_elems (args); n->tree_info |= OPT_SAFE; return 1; } } return 0; } /* 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 !SAFE_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 SAFE_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_AUTO_MAP: case F_APPLY: if(CAR(n) && CAR(n)->token == F_CONSTANT && TYPEOF(CAR(n)->u.sval) == T_FUNCTION && SUBTYPEOF(CAR(n)->u.sval) == FUNCTION_BUILTIN && CAR(n)->u.sval.u.efun->function == f) return &_CDR(n); } return 0; } #ifdef PIKE_DEBUG /* 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: fputs("FREED_NODE", stderr); 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 '?': fputc('(', stderr); low_print_tree(_CAR(foo),0); fputs(")?(", stderr); if (_CDR(foo)) { low_print_tree(_CADR(foo),0); fputs("):(", stderr); low_print_tree(_CDDR(foo),0); } else { fputs("0:0", stderr); } fputc(')', stderr); break; case F_EXTERNAL: case F_GET_SET: if(needlval) fputc('&', stderr); { struct program_state *state = Pike_compiler; char *name = "?"; int program_id = foo->u.integer.a; int level = 0; int id_no = foo->u.integer.b; while(state && (state->new_program->id != program_id)) { state = state->previous; level++; } if (id_no == IDREF_MAGIC_THIS) name = "this"; else if (state) { struct identifier *id = ID_FROM_INT(state->new_program, id_no); if (id && id->name) { name = id->name->str; } } fprintf(stderr, "ext(%d:%s)", level, name); } break; case F_TRAMPOLINE: if (Pike_compiler->new_program) { fprintf(stderr, "trampoline<%s>", ID_FROM_INT(Pike_compiler->new_program, foo->u.trampoline.ident)->name->str); } else { fputs("trampoline<unknown identifier>", stderr); } break; case F_ASSIGN: low_print_tree(_CDR(foo),1); fputc('=', stderr); low_print_tree(_CAR(foo),0); break; case F_ASSIGN_SELF: low_print_tree(_CDR(foo),1); fputc(':', stderr); fputc('=', stderr); low_print_tree(_CAR(foo),0); break; case F_POP_VALUE: fputc('{', stderr); low_print_tree(_CAR(foo), 0); fputc('}', stderr); break; case F_CAST: { fputc('(', stderr); simple_describe_type(foo->type); fprintf(stderr, "){"); low_print_tree(_CAR(foo),0); fputc('}', stderr); break; } case F_SOFT_CAST: { fputc('[', stderr); simple_describe_type(foo->type); fputc('(', stderr); low_print_tree(_CDR(foo), 0); fprintf(stderr, ")]{"); low_print_tree(_CAR(foo),0); fputc('}', 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) fputs(";\n", stderr); else fputs(",\n", stderr); } 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) fputs(";\n", stderr); 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: { dynamic_buffer save_buf; char *s; init_buf(&save_buf); describe_svalue(& foo->u.sval, 0, 0); s=simple_free_buf(&save_buf); fprintf(stderr, "const(%s)",s); free(s); break; } case F_VAL_LVAL: low_print_tree(_CAR(foo),0); fputs(",&", stderr); low_print_tree(_CDR(foo),0); return; case F_AUTO_MAP: fputs("__automap__ ", stderr); low_print_tree(_CAR(foo),0); fputc('(', stderr); low_print_tree(_CDR(foo),0); fputc(')', stderr); return; case F_AUTO_MAP_MARKER: low_print_tree(_CAR(foo),0); fputs("[*]", stderr); return; case F_APPLY: low_print_tree(_CAR(foo),0); fputc('(', stderr); low_print_tree(_CDR(foo),0); fputc(')', 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: fputs("loop(", stderr); if(car_is_node(foo)) low_print_tree(_CAR(foo),0); fputs(",{", stderr); if(cdr_is_node(foo)) low_print_tree(_CDR(foo),0); fputs("})", stderr); return; default: if(!car_is_node(foo) && !cdr_is_node(foo)) { fputs(get_token_name(foo->token), stderr); return; } if(foo->token<256) { fputc(foo->token, stderr); }else{ fputs(get_token_name(foo->token), stderr); } fputc('(', stderr); 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); fputc(')', stderr); return; } } void print_tree(node *n) { check_tree(n,0); low_print_tree(n,0); fputc('\n', stderr); } #endif /* 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=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) { fputs("scope found.\n", stderr); } #endif /* PIKE_DEBUG */ return (*a)->vars + num; } #ifdef PIKE_DEBUG if (l_flag > 4) { fputs("Creating new scope.\n", stderr); } #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. */ /* noblock: Don't mark unused variables that are written to as blocked. * overwrite: n is an lvalue that is overwritten. */ 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: case F_GET_SET: 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 */ set_pointer: if(overwrite) { if(*q == VAR_UNUSED && !noblock) { *q = VAR_BLOCKED; #ifdef PIKE_DEBUG if (l_flag > 2) { fputs("blocked\n", stderr); } } else { if (l_flag > 2) { fputs("overwritten\n", stderr); } #endif /* PIKE_DEBUG */ } } else { if(*q == VAR_UNUSED) { *q = VAR_USED; #ifdef PIKE_DEBUG if (l_flag > 2) { fputs("used\n", stderr); } } else { if (l_flag > 2) { fputs("kept\n", stderr); } #endif /* PIKE_DEBUG */ } } break; case F_ARROW: case F_INDEX: #ifdef PARANOID_INDEXING /* Be paranoid, and assume aliasing. */ p->ext_flags = VAR_USED; #endif /* PARANOID_INDEXING */ 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); break; case F_ASSIGN: case F_ASSIGN_SELF: 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: case F_GET_SET: 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_APPLY: case F_AUTO_MAP: if(n->tree_info & OPT_SIDE_EFFECT) { p->ext_flags = VAR_USED; } find_written_vars(CAR(n), p, 0); find_written_vars(CDR(n), p, 0); break; case F_AUTO_MAP_MARKER: find_written_vars(CAR(n), p, lvalue); break; case F_INDEX: case F_ARROW: #ifdef PARANOID_INDEXING /* Be paranoid and assume aliasing. */ if (lvalue) p->ext_flags = VAR_USED; find_written_vars(CAR(n), p, 0); #else /* !PARAONID_INDEXING */ /* Propagate the change to the indexed value. * Note: This is sensitive to aliasing effects. */ find_written_vars(CAR(n), p, lvalue); #endif /* PARANOID_INDEXING */ find_written_vars(CDR(n), p, 0); break; case F_SOFT_CAST: find_written_vars(CAR(n), p, lvalue); 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: case F_ASSIGN_SELF: case F_MULTI_ASSIGN: find_written_vars(CAR(n), p, 0); find_written_vars(CDR(n), p, 1); break; case F_APPEND_MAPPING: case F_APPEND_ARRAY: 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); /* FIXME: Marks arg 2 as written for now. */ 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); /* A depends on B if A uses stuff that is written to by B. */ find_used_variables(a, &aa, 0, 0); find_written_vars(b, &bb, 0); #ifdef PIKE_DEBUG if (l_flag > 2) { struct scope_info *aaa = aa.locals; while (aaa) { fputs("Used locals:\n", stderr); for (e = 0; e < MAX_VAR; e++) { if (aaa->vars[e] == VAR_USED) { fprintf(stderr, "\t%d:%d\n", aaa->scope_id, e); } } aaa = aaa->next; } aaa = bb.locals; while (aaa) { fputs("Written locals:\n", stderr); for (e = 0; e < MAX_VAR; e++) { if (aaa->vars[e] != VAR_UNUSED) { fprintf(stderr, "\t%d:%d\n", aaa->scope_id, e); } } aaa = aaa->next; } } #endif /* PIKE_DEBUG */ UNSET_ONERROR(free_bb); UNSET_ONERROR(free_aa); /* If there was an error or * If A has external dependencies due to indexing, we won't * investigate further. */ if(aa.err || bb.err || aa.ext_flags == VAR_USED) { free_vars(&aa); free_vars(&bb); return 1; } /* Check for overlap in locals. */ { 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) { /* B has side effects. * * A is dependant if A uses any externals at all. */ /* 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 { /* Otherwise check for overlaps. */ 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 || !a) 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) { if(l_flag > 3) { fputs("Checking if: ", stderr); print_tree(a); fputs("Depends on: ", stderr); print_tree(b); if(depend_p3(a,b)) { fputs("The answer is (drumroll) : yes\n", stderr); return 1; }else{ fputs("The answer is (drumroll) : no\n", stderr); 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; } static int function_type_max=0; static struct pike_string *get_name_of_function(node *n) { struct pike_string *name = NULL; if (!n) { MAKE_CONST_STRING(name, "NULL"); return name; } switch(n->token) { #if 0 /* FIXME */ case F_TRAMPOLINE: #endif case F_ARROW: case F_INDEX: if(!CDR(n)) { MAKE_CONST_STRING(name, "NULL"); } else if(CDR(n)->token == F_CONSTANT && TYPEOF(CDR(n)->u.sval) == T_STRING) { name = CDR(n)->u.sval.u.string; }else{ MAKE_CONST_STRING(name, "dynamically resolved function"); } break; case F_CONSTANT: switch(TYPEOF(n->u.sval)) { case T_FUNCTION: if(SUBTYPEOF(n->u.sval) == FUNCTION_BUILTIN) { name = n->u.sval.u.efun->name; }else{ name = ID_FROM_INT(n->u.sval.u.object->prog, SUBTYPEOF(n->u.sval))->name; } break; case T_ARRAY: MAKE_CONST_STRING(name, "array call"); break; case T_PROGRAM: MAKE_CONST_STRING(name, "clone call"); break; default: MAKE_CONST_STRING(name, "`() (function call)"); break; } break; case F_EXTERNAL: case F_GET_SET: { int id_no = n->u.integer.b; if (id_no == IDREF_MAGIC_THIS) { MAKE_CONST_STRING(name, "this"); /* Should perhaps qualify it. */ } else { int program_id = n->u.integer.a; struct program_state *state = Pike_compiler; 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; #if 0 #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"); Pike_fatal("Type of external node is not matching it's identifier.\n"); } #endif #endif } } if (!name) { MAKE_CONST_STRING(name, "external symbol"); } } } break; case F_CAST: case F_SOFT_CAST: name = get_name_of_function(CAR(n)); break; case F_TRAMPOLINE: MAKE_CONST_STRING(name, "trampoline function"); break; case F_LOCAL: MAKE_CONST_STRING(name, "local variable"); break; case F_APPLY: if ((CAR(n)->token == F_CONSTANT) && (TYPEOF(CAR(n)->u.sval) == T_FUNCTION) && (SUBTYPEOF(CAR(n)->u.sval) == FUNCTION_BUILTIN) && (CAR(n)->u.sval.u.efun->function == debug_f_aggregate)) { if (CDR(n)) { n = CDR(n); while (n && (n->token == F_ARG_LIST)) n = CAR(n); if (n) { /* FIXME: Should really join the names of all the args. */ name = get_name_of_function(n); } else { MAKE_CONST_STRING(name, "dynamic array"); } } else { MAKE_CONST_STRING(name, "empty array"); } } else { MAKE_CONST_STRING(name, "returned value"); } break; default: /* fprintf(stderr, "Node token: %s(%d)\n", get_f_name(n->token), n->token); */ MAKE_CONST_STRING(name, "unknown function"); } #ifdef PIKE_DEBUG if (!name) { Pike_fatal("Failed to get name of function.\n"); } #endif return name; } void fix_type_field(node *n) { struct compilation *c = THIS_COMPILATION; struct pike_type *type_a, *type_b; struct pike_type *old_type; if (!n || (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; /* These two are needed if we want to extract types from nodes while building the tree. */ if( CAR(n) ) fix_type_field(CAR(n)); if( CDR(n) ) fix_type_field(CDR(n)); switch(n->token) { case F_SOFT_CAST: if (CAR(n) && CAR(n)->type) { struct pike_type *soft_type = NULL; if (CDR(n) && (CDR(n)->token == F_CONSTANT) && (TYPEOF(CDR(n)->u.sval) == T_TYPE)) { soft_type = CDR(n)->u.sval.u.type; if ((n->type = soft_cast(soft_type, CAR(n)->type, 0))) { /* Success. */ break; } ref_push_type_value(CAR(n)->type); ref_push_type_value(soft_type); yytype_report(REPORT_ERROR, NULL, 0, NULL, NULL, 0, NULL, 2, "Soft cast of %O to %O isn't a valid cast."); } else { yytype_report(REPORT_ERROR, NULL, 0, type_type_string, NULL, 0, CDR(n)->type, 0, "Soft cast with non-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_APPEND_MAPPING: if (!CAR(n) || (CAR(n)->type == void_type_string)) { yyerror("Assigning a void expression."); copy_pike_type(n->type, void_type_string); } else /* FIXME: Not really correct, should calculate type of RHS. */ copy_pike_type(n->type, CAR(n)->type); break; case F_APPEND_ARRAY: if (!CAR(n) || (CAR(n)->type == void_type_string)) { yyerror("Assigning a void expression."); copy_pike_type(n->type, void_type_string); } else if (!CDR(n)) { copy_pike_type(n->type, CAR(n)->type); } else { struct pike_type *tmp; /* Ensure that the type-fields are up to date. */ fix_type_field(CAR(n)); fix_type_field(CDR(n)); type_stack_mark(); push_finished_type(CDR(n)->type); push_type(T_ARRAY); n->type = and_pike_types(CAR(n)->type, tmp = pop_unfinished_type()); free_type(tmp); } break; case F_ASSIGN: case F_ASSIGN_SELF: if (!CAR(n) || (CAR(n)->type == void_type_string)) { yyerror("Assigning a void expression."); copy_pike_type(n->type, void_type_string); } else if (!CDR(n)) { copy_pike_type(n->type, CAR(n)->type); } else { /* Ensure that the type-fields are up to date. */ fix_type_field(CAR(n)); fix_type_field(CDR(n)); #if 0 /* This test isn't sufficient, see below. */ check_node_type(CAR(n), CDR(n)->type, "Bad type in assignment."); #else /* !0 */ 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. * * FIXME: Exactly what case is the problem? * /grubba 2005-02-15 * * Example: * array tmp = ({([]),([])}); * tmp->foo = 7; // Multi-assign. * /grubba 2007-04-27 */ if (((CDR(n)->token != F_INDEX && CDR(n)->token != F_ARROW) || !(match_types(array_type_string, CADR(n)->type))) && !match_types(CDR(n)->type,CAR(n)->type)) { yytype_report(REPORT_ERROR, NULL, 0, CDR(n)->type, NULL, 0, CAR(n)->type, 0, "Bad type in assignment."); } else { if (c->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) { fputs("Warning: Invalid assignment: ", stderr); print_tree(n); } #endif /* PIKE_DEBUG */ yywarning("An expression of type %S cannot be assigned to " "a variable of type %S.", t1, t2); free_string(t2); free_string(t1); } if (runtime_options & RUNTIME_CHECK_TYPES) { _CAR(n) = mksoftcastnode(CDR(n)->type, mkcastnode(mixed_type_string, CAR(n))); } } } #endif /* 0 */ n->type = and_pike_types(CAR(n)->type, CDR(n)->type); } break; case F_ARRAY_LVALUE: { node *lval_list; if (!(lval_list = CAR(n))) { copy_pike_type(n->type, mixed_type_string); } else { struct pike_type *t; node *n2; if (lval_list->token == F_LVALUE_LIST) { n2 = CAR(lval_list); } else { n2 = lval_list; } if (n2) { copy_pike_type(t, n2->type); } else { copy_pike_type(t, zero_type_string); } while ((n2 != lval_list) && (lval_list = CDR(lval_list))) { if (lval_list->token == F_LVALUE_LIST) { n2 = CAR(lval_list); } else { n2 = lval_list; } if (n2) { struct pike_type *tmp = or_pike_types(t, n2->type, 1); free_type(t); t = tmp; } } type_stack_mark(); push_finished_type(t); push_type(T_ARRAY); free_type(t); n->type = pop_unfinished_type(); } } break; case F_INDEX: case F_ARROW: if (!CAR(n) || (CAR(n)->type == void_type_string)) { yyerror("Indexing a void expression."); /* The optimizer converts this to an expression returning 0. */ copy_pike_type(n->type, zero_type_string); } else if (CDR(n)) { int valid; type_a=CAR(n)->type; type_b=CDR(n)->type; if((valid = check_indexing(type_a, type_b, n)) <= 0) if(!Pike_compiler->catch_level) { yytype_report((!valid)?REPORT_ERROR:REPORT_WARNING, NULL, 0, NULL, NULL, 0, type_a, 0, "Indexing on illegal type."); ref_push_type_value(type_b); low_yyreport((!valid)?REPORT_ERROR:REPORT_WARNING, NULL, 0, type_check_system_string, 1, "Index : %O."); } n->type = index_type(type_a, type_b, n); } else { copy_pike_type(n->type, mixed_type_string); } break; case F_RANGE: if (!CAR(n)) { /* Unlikely to occur, and if it does, it has probably * already been complained about. */ copy_pike_type(n->type, mixed_type_string); } else { node *low = CADR (n), *high = CDDR (n); n->type = range_type(CAR(n)->type, ((low->token == F_RANGE_OPEN) || !CAR(low)) ? NULL : CAR (low)->type, ((high->token == F_RANGE_OPEN) || !CAR(high)) ? NULL : CAR (high)->type); } break; case F_PUSH_ARRAY: if (CAR(n)) { struct pike_type *array_type; MAKE_CONSTANT_TYPE(array_type, tArr(tZero)); if (!pike_types_le(array_type, CAR(n)->type)) { yytype_report(REPORT_ERROR, NULL, 0, array_type, NULL, 0, CAR(n)->type, 0, "Bad argument to splice operator."); } free_type(array_type); /* FIXME: The type field of the splice operator is not yet utilized. * * It probably ought to be something similar to MANY(..., VOID). */ n->type = index_type(CAR(n)->type, int_type_string, n); } else { copy_pike_type(n->type, mixed_type_string); } break; case F_AUTO_MAP_MARKER: if (!CAR(n) || (CAR(n)->type == void_type_string)) { 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; if(!match_types(type_a, array_type_string)) if(!Pike_compiler->catch_level) yytype_report(REPORT_ERROR, NULL, 0, array_type_string, NULL, 0, type_a, 0, "[*] on non-array."); n->type=index_type(type_a, int_type_string, n); } break; case F_AUTO_MAP: case F_APPLY: if (!CAR(n) || (CAR(n)->type == void_type_string)) { yyerror("Calling a void expression."); } else { struct pike_type *f; /* Expected type. */ struct pike_type *s; /* Actual type */ struct pike_string *name = NULL; INT32 args; args = 0; name = get_name_of_function(CAR(n)); #ifdef PIKE_DEBUG if (l_flag>2) safe_pike_fprintf (stderr, "Checking call to %S at %S:%ld.\n", name, n->current_file, (long)n->line_number); #endif /* PIKE_DEBUG */ /* NOTE: new_check_call() steals a reference from f! */ copy_pike_type(f, CAR(n)->type); f = debug_malloc_pass(new_check_call(name, f, CDR(n), &args, 0)); if (!f) { /* Errors have been generated. */ copy_pike_type(n->type, mixed_type_string); break; } if ((n->type = new_get_return_type(dmalloc_touch(struct pike_type *, f), 0))) { /* Type/argument-check OK. */ debug_malloc_touch(n->type); free_type(f); if(n->token == F_AUTO_MAP) { push_finished_type(n->type); push_type(T_ARRAY); free_type(n->type); n->type = pop_type(); } break; } /* Too few arguments or similar. */ copy_pike_type(n->type, mixed_type_string); if ((s = get_first_arg_type(dmalloc_touch(struct pike_type *, f), CALL_NOT_LAST_ARG))) { yytype_report(REPORT_ERROR, NULL, 0, s, NULL, 0, NULL, 0, "Too few arguments to %S (got %d).", name, args); free_type(s); yytype_report(REPORT_ERROR, NULL, 0, NULL, NULL, 0, CAR(n)->type, 0, "Function type:"); } else { yytype_report(REPORT_ERROR, NULL, 0, function_type_string, NULL, 0, f, 0, "Attempt to call a non function value %S.", name); } free_type(f); break; } 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_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. Converted to zero."); if (!CAR(n)) { _CAR(n) = mkintnode(0); copy_pike_type(n->type, CAR(n)->type); } else { _CAR(n) = mknode(F_COMMA_EXPR, CAR(n), mkintnode(0)); copy_pike_type(n->type, CDAR(n)->type); } break; } else if(Pike_compiler->compiler_frame && Pike_compiler->compiler_frame->current_return_type) { if ((Pike_compiler->compiler_frame->current_return_type != void_type_string) || (CAR(n)->token != F_CONSTANT) || !SAFE_IS_ZERO(& CAR(n)->u.sval)) { check_node_type(CAR(n), Pike_compiler->compiler_frame->current_return_type, "Wrong return type."); } } copy_pike_type(n->type, void_type_string); break; case F_CASE_RANGE: if (CDR(n) && CAR(n)) { fix_type_field(CAR(n)); fix_type_field(CDR(n)); /* 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_report(REPORT_ERROR, NULL, 0, CAR(n)->type, NULL, 0, CDR(n)->type, 0, "Type mismatch in case range."); } } else if ((c->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_report(REPORT_ERROR, NULL, 0, CAR(n)->type, NULL, 0, CDR(n)->type, 0, "Type mismatch in case range."); } } 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_report(REPORT_WARNING, NULL, 0, CAR(n)->type, NULL, 0, CDR(n)->type, 0, "Type mismatch in case range."); } } } } if (CDR(n) && (Pike_compiler->compiler_pass == 2)) { fix_type_field(CDR(n)); if (!match_types(CDR(n)->type, enumerable_type_string)) { yytype_report(REPORT_WARNING, NULL, 0, enumerable_type_string, NULL, 0, CDR(n)->type, 0, "Case value is not an enumerable type."); } } /* FALL_THROUGH */ case F_CASE: if (CAR(n) && (Pike_compiler->compiler_pass == 2)) { fix_type_field(CAR(n)); if (!match_types(CAR(n)->type, enumerable_type_string)) { yytype_report(REPORT_WARNING, NULL, 0, enumerable_type_string, NULL, 0, CAR(n)->type, 0, "Case value is not an enumerable type."); } } /* 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 (!check_node_type(CAAR(n), iterator_type, "Bad argument 1 to foreach()")) { /* No use checking the index and value types if * the iterator type is bad. */ free_type(iterator_type); goto foreach_type_check_done; } 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. */ yytype_report(REPORT_ERROR, NULL, 0, NULL, NULL, 0, NULL, 0, "Bad iterator type for index in foreach()."); } else { if (!pike_types_le(index_type, CADAR(n)->type)) { int level = REPORT_NOTICE; if (!match_types(CADAR(n)->type, index_type)) { level = REPORT_ERROR; } else if (c->lex.pragmas & ID_STRICT_TYPES) { level = REPORT_WARNING; } yytype_report(level, NULL, 0, index_type, NULL, 0, CADAR(n)->type, 0, "Type mismatch for index in foreach()."); } 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. */ yytype_report(REPORT_ERROR, NULL, 0, NULL, NULL, 0, NULL, 0, "Bad iterator type for value in foreach()."); } else { if (!pike_types_le(value_type, CDDAR(n)->type)) { int level = REPORT_NOTICE; if (!match_types(CDDAR(n)->type, value_type)) { level = REPORT_ERROR; } else if (c->lex.pragmas & ID_STRICT_TYPES) { level = REPORT_WARNING; } yytype_report(level, NULL, 0, value_type, NULL, 0, CDDAR(n)->type, 0, "Type mismatch for value in foreach()."); } 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)) { yytype_report(REPORT_ERROR, NULL, 0, array_zero, NULL, 0, CAAR(n)->type, 0, "Bad argument 1 to foreach()."); } else { if ((c->lex.pragmas & ID_STRICT_TYPES) && !pike_types_le(CAAR(n)->type, array_type_string)) { yytype_report(REPORT_WARNING, NULL, 0, CAAR(n)->type, NULL, 0, array_type_string, 0, "Argument 1 to foreach() is not always an array."); } if (!CDAR(n)) { /* No loop variable. Will be converted to a counted loop * by treeopt. */ } else if (pike_types_le(CDAR(n)->type, void_type_string)) { yyerror("Bad argument 2 to foreach()."); } else { struct pike_type *array_value_type; type_stack_mark(); push_finished_type(CDAR(n)->type); push_type(T_ARRAY); array_value_type = pop_unfinished_type(); check_node_type(CAAR(n), array_value_type, "Bad argument 1 to foreach()."); free_type(array_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)) { yyerror("Too few arguments to sscanf()."); MAKE_CONSTANT_TYPE(n->type, tIntPos); } else { struct pike_string *sscanf_name; struct pike_type *sscanf_type; node *args; INT32 argno = 0; MAKE_CONST_STRING(sscanf_name, "sscanf"); add_ref(sscanf_type = sscanf_type_string); args = mknode(F_ARG_LIST, CAR(n), CDR(n)); add_ref(CAR(n)); if (CDR(n)) add_ref(CDR(n)); sscanf_type = new_check_call(sscanf_name, sscanf_type, args, &argno, 0); free_node(args); if (sscanf_type) { if (!(n->type = new_get_return_type(sscanf_type, 0))) { struct pike_type *expected; if ((expected = get_first_arg_type(sscanf_type, CALL_NOT_LAST_ARG))) { yytype_report(REPORT_ERROR, NULL, 0, expected, NULL, 0, NULL, 0, "Too few arguments to sscanf (got %d).", argno); free_type(expected); } else { /* Most likely not reached. */ yytype_report(REPORT_ERROR, NULL, 0, function_type_string, NULL, 0, sscanf_type, 0, "Attempt to call a non function value sscanf."); } } free_type(sscanf_type); } if (!n->type) { 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(tStr tOr3(tVoid,tObj,tDeprecated(tInt)) tOr(tVoid,tInt), 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) tOr(tVoid,tInt), tVar(0))); break; case F_MAGIC_INDICES: MAKE_CONSTANT_TYPE(n->type, tFunc(tOr(tVoid,tInt), tArr(tString))); break; case F_MAGIC_VALUES: /* FIXME: Could have a stricter type for ::_values. */ MAKE_CONSTANT_TYPE(n->type, tFunc(tOr(tVoid,tInt), tArray)); break; case F_MAGIC_TYPES: /* FIXME: Could have a stricter type for ::_types. */ MAKE_CONSTANT_TYPE(n->type, tFunc(tOr(tVoid,tInt), tArr(tType(tMix)))); 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); } } 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) { Pike_fatal("zzap_try_optimize() lost track of parent.\n"); } #endif /* PIKE_DEBUG */ n->parent = parent; } #if defined(SHARED_NODES) && 0 /* 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: case F_ASSIGN_SELF: 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_AUTO_MAP: 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: case F_CASE_RANGE: { 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]; 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: case F_ASSIGN_SELF: 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(n->token, 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_AUTO_MAP: 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(n->token, 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: case F_CASE_RANGE: { 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)) { fputs("\nBefore localopt: ", stderr); print_tree(n); fputs("After localopt: ", stderr); print_tree(n2); } } #endif /* PIKE_DEBUG */ free_node(n); return n2; } #endif /* SHARED_NODES && 0 */ static void optimize(node *n) { node *tmp1, *tmp2, *tmp3; struct compilation *c = THIS_COMPILATION; struct pike_string *save_file = dmalloc_touch(struct pike_string *, c->lex.current_file); INT_TYPE save_line = c->lex.current_line; do { if(car_is_node(n) && !(CAR(n)->node_info & OPT_OPTIMIZED)) { CAR(n)->parent = n; n = CAR(n); continue; } if(cdr_is_node(n) && !(CDR(n)->node_info & OPT_OPTIMIZED)) { CDR(n)->parent = n; n = CDR(n); continue; } c->lex.current_line = n->line_number; c->lex.current_file = dmalloc_touch(struct pike_string *, n->current_file); 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->parent) break; if(n->tree_info & (OPT_NOT_CONST| OPT_SIDE_EFFECT| OPT_EXTERNAL_DEPEND| OPT_ASSIGNMENT| OPT_RETURN| OPT_FLAG_NODE)) { if(car_is_node(n) && !(CAR(n)->tree_info & (OPT_NOT_CONST| OPT_SIDE_EFFECT| OPT_EXTERNAL_DEPEND| OPT_ASSIGNMENT| OPT_RETURN| OPT_FLAG_NODE)) && (CAR(n)->tree_info & OPT_TRY_OPTIMIZE) && CAR(n)->token != F_VAL_LVAL) { _CAR(n) = eval(CAR(n)); 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| OPT_FLAG_NODE)) && (CDR(n)->tree_info & OPT_TRY_OPTIMIZE)) { _CDR(n) = eval(CDR(n)); 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 switch(n->token) { /* Unfortunately GCC doesn't ignore #pragma clang yet. */ #ifdef __clang__ #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wparentheses-equality" #include "treeopt.h" #pragma clang diagnostic pop #else #include "treeopt.h" #endif 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) { fputs("Optimized: ", stderr); print_tree(n); fputs("Result: ", stderr); print_tree(tmp1); } #endif /* PIKE_DEBUG */ 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; } if(tmp1) tmp1->parent = n->parent; else tmp1 = n->parent; free_node(n); n = tmp1; #ifdef PIKE_DEBUG if(l_flag > 3) { fputs("Result: ", stderr); print_tree(n); } #endif continue; } n->node_info |= OPT_OPTIMIZED; n=n->parent; }while(n); c->lex.current_line = save_line; c->lex.current_file = dmalloc_touch(struct pike_string *, save_file); } void optimize_node(node *n) { if(n && 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 *UNUSED(cb), void *tmp, void *UNUSED(ignored)) { struct timer_oflo *foo=(struct timer_oflo *)tmp; if(foo->counter-- < 0) { foo->yes=1; pike_throw(); } } ptrdiff_t eval_low(node *n,int print_error) { unsigned INT16 num_strings, num_constants; unsigned INT32 num_program; size_t jump; struct svalue *save_sp = Pike_sp; ptrdiff_t ret; struct program *prog = Pike_compiler->new_program; #ifdef PIKE_USE_MACHINE_CODE size_t num_relocations; #endif /* PIKE_USE_MACHINE_CODE */ #ifdef PIKE_DEBUG if(l_flag > 3 && n) { fprintf(stderr,"Evaluating (tree info=%x):",n->tree_info); print_tree(n); } #endif fix_type_field(n); if(Pike_compiler->num_parse_error) { return -1; } num_strings = prog->num_strings; num_constants = prog->num_constants; num_program = prog->num_program; #ifdef PIKE_USE_MACHINE_CODE num_relocations = prog->num_relocations; #endif /* PIKE_USE_MACHINE_CODE */ jump = docode(dmalloc_touch(node *, n)); 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; #ifdef PIKE_USE_MACHINE_CODE make_area_executable ((char *) (prog->program + num_program), (prog->num_program - num_program) * sizeof (prog->program[0])); #endif tmp_callback=add_to_callback(&evaluator_callbacks, check_evaluation_time, (void *)&foo,0); if(apply_low_safe_and_stupid(Pike_compiler->fake_object, jump)) { /* Assume the node will throw errors at runtime too. */ n->tree_info |= OPT_SIDE_EFFECT; n->node_info |= OPT_SIDE_EFFECT; if(print_error) /* Generate error message */ if(!Pike_compiler->catch_level) handle_compile_exception("Error evaluating constant."); else { free_svalue(&throw_value); mark_free_svalue (&throw_value); } else { free_svalue(&throw_value); mark_free_svalue (&throw_value); } }else{ if(foo.yes) pop_n_elems(Pike_sp-save_sp); else ret=Pike_sp-save_sp; n->tree_info |= OPT_SAFE; } remove_callback(tmp_callback); } while(prog->num_strings > num_strings) { prog->num_strings--; free_string(prog->strings[prog->num_strings]); } while(prog->num_constants > num_constants) { struct program_constant *p_const; prog->num_constants--; p_const = prog->constants + prog->num_constants; free_svalue(&p_const->sval); #if 0 if (p_const->name) { free_string(p_const->name); p_const->name = NULL; } #endif /* 0 */ } #ifdef PIKE_USE_MACHINE_CODE prog->num_relocations = num_relocations; #ifdef VALGRIND_DISCARD_TRANSLATIONS /* We won't use this machine code any more... */ VALGRIND_DISCARD_TRANSLATIONS(prog->program + num_program, (prog->num_program - num_program)*sizeof(PIKE_OPCODE_T)); #endif /* VALGRIND_DISCARD_TRANSLATIONS */ #endif /* PIKE_USE_MACHINE_CODE */ prog->num_program = num_program; #ifdef PIKE_DEBUG if(l_flag > 3 && n) { fprintf(stderr,"Evaluation ==> %"PRINTPTRDIFFT"d\n", ret); } #endif return ret; } static node *eval(node *n) { node *new; ptrdiff_t args; if(!is_const(n) || n->node_info & OPT_FLAG_NODE) return n; args=eval_low(n,0); 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 && SAFE_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) { 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; #ifdef PIKE_DEBUG struct compilation *c = THIS_COMPILATION; #endif CHECK_COMPILER(); optimize_node(n); check_tree(n, 0); #ifdef PIKE_DEBUG if((a_flag > 1) || (c->lex.pragmas & ID_DISASSEMBLE)) fprintf(stderr, "Doing function '%s' at %lx\n", name->str, DO_NOT_WARN((unsigned long)PIKE_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; #ifdef PIKE_DEBUG if(a_flag > 5) fprintf(stderr, "Extra identifier flags:0x%02x\n", vargs); #endif if(Pike_compiler->compiler_pass==1) { tmp.offset=-1; #ifdef PIKE_DEBUG if(a_flag > 4) { fputs("Making prototype (pass 1) for: ", stderr); print_tree(n); } #endif }else{ #if defined(SHARED_NODES) && 0 /* Try the local variable usage analyser. */ n = localopt(n); /* Try optimizing some more. */ optimize(n); #endif /* SHARED_NODES && 0 */ n = mknode(F_ARG_LIST, n, 0); if((foo=is_stupid_func(n, args, vargs, type))) { if(TYPEOF(*foo) == T_FUNCTION && SUBTYPEOF(*foo) == 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:%ld: IDENTIFIER OPTIMIZATION %s == %s\n", c->lex.current_file->str, (long)c->lex.current_line, name->str, foo->u.efun->name->str); #endif ret=define_function(name, type, (unsigned INT16)modifiers, (unsigned INT8)(IDENTIFIER_C_FUNCTION | IDENTIFIER_HAS_BODY | vargs), &tmp, foo->u.efun->flags); free_node(n); return ret; } } } tmp.offset=PIKE_PC; Pike_compiler->compiler_frame->num_args=args; #ifdef PIKE_DEBUG if(a_flag > 2) { fputs("Coding: ", stderr); print_tree(n); } #endif if(!Pike_compiler->num_parse_error) { extern int remove_clear_locals; remove_clear_locals=args; if(vargs) remove_clear_locals++; tmp.offset=do_code_block(n); remove_clear_locals=0x7fffffff; } } ret=define_function(name, type, (unsigned INT16)modifiers, (unsigned INT8)(IDENTIFIER_PIKE_FUNCTION | IDENTIFIER_HAS_BODY | 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 > 1283985d39d289da0a13023806ba9cc00a366ea5 [Annotate]