static void check_implicit_funcall(expr *e, symtable *stab, char **const psp) { struct symtab_entry ent; funcargs *args; decl *df, *owning_func; type *func_ty; if(e->expr->in_parens || !expr_kind(e->expr, identifier) /* not folded yet, hence no 'e->expr->bits.ident.type != IDENT_NORM' */ /* get the spel that parse stashes in the identifier expr: */ || !((*psp) = e->expr->bits.ident.bits.ident.spel)) { return; } /* check for implicit function */ if(symtab_search(stab, *psp, NULL, &ent) && ent.type == SYMTAB_ENT_DECL) { e->expr->bits.ident.bits.ident.sym = ent.bits.decl->sym; return; } args = funcargs_new(); /* set up the funcargs as if it's "x()" - i.e. any args */ funcargs_empty(args); func_ty = type_func_of( type_nav_btype(cc1_type_nav, type_int), args, symtab_new(stab, &e->where) /*new symtable for args*/); cc1_warn_at(&e->expr->where, implicit_func, "implicit declaration of function \"%s\"", *psp); df = decl_new(); memcpy_safe(&df->where, &e->where); df->ref = func_ty; df->spel = e->expr->bits.ident.bits.ident.spel; df->flags |= DECL_FLAGS_IMPLICIT; fold_decl(df, stab); /* update calling conv, for e.g. */ df->sym->type = sym_global; e->expr->bits.ident.bits.ident.sym = df->sym; e->expr->tree_type = func_ty; owning_func = symtab_func(stab); if(owning_func) symtab_insert_before(symtab_root(stab), owning_func, df); else symtab_add_to_scope(symtab_root(stab), df); /* function call at global scope */ }
void fold_expr_addr(expr *e, symtable *stab) { if(e->bits.lbl.spel){ decl *in_func = symtab_func(stab); if(!in_func) die_at(&e->where, "address-of-label outside a function"); if(e->bits.lbl.static_ctx) in_func->bits.func.contains_static_label_addr = 1; (e->bits.lbl.label = symtab_label_find_or_new( stab, e->bits.lbl.spel, &e->where)) ->uses++; /* address of label - void * */ e->tree_type = type_ptr_to(type_nav_btype(cc1_type_nav, type_void)); }else{ /* if it's an identifier, act as a read */ fold_inc_writes_if_sym(e->lhs, stab); fold_expr_nodecay(e->lhs, stab); e->tree_type = type_ptr_to(e->lhs->tree_type); /* can address: lvalues, arrays and functions */ if(!expr_is_addressable(e->lhs)){ warn_at_print_error(&e->where, "can't take the address of %s (%s)", expr_str_friendly(e->lhs), type_to_str(e->lhs->tree_type)); fold_had_error = 1; return; } if(expr_kind(e->lhs, identifier)){ sym *sym = e->lhs->bits.ident.bits.ident.sym; if(sym){ decl *d = sym->decl; if((d->store & STORE_MASK_STORE) == store_register) die_at(&e->lhs->where, "can't take the address of register"); } } fold_check_expr(e->lhs, FOLD_CHK_ALLOW_VOID | FOLD_CHK_NO_BITFIELD, "address-of"); } }
void fold_stmt_goto(stmt *s) { if(!symtab_func(s->symtab)) die_at(&s->where, "goto outside of a function"); if(s->expr){ FOLD_EXPR(s->expr, s->symtab); }else{ (s->bits.lbl.label = symtab_label_find_or_new( s->symtab, s->bits.lbl.spel, &s->where)) ->uses++; dynarray_add(&s->bits.lbl.label->jumpers, s); } }