from __future__ import annotations from typing import Any import re import ast import llvmlite.ir as ir from llvmlite.ir.values import _Undefined from lib.includes import t as _t class StructGenMixin: def _get_align(self, llvm_type: ir.Type) -> int: if isinstance(llvm_type, ir.IntType): return max(1, llvm_type.width // 8) if isinstance(llvm_type, ir.FloatType): return 4 if isinstance(llvm_type, ir.DoubleType): return 8 if isinstance(llvm_type, ir.PointerType): return self.ptr_size if isinstance(llvm_type, ir.ArrayType): return self._get_align(llvm_type.element) if isinstance(llvm_type, ir.LiteralStructType): return max((self._get_align(f) for f in llvm_type.elements), default=1) if isinstance(llvm_type, ir.IdentifiedStructType): if llvm_type.elements is None or len(llvm_type.elements) == 0: return self.ptr_size # opaque struct, assume pointer alignment return max((self._get_align(f) for f in llvm_type.elements), default=1) if isinstance(llvm_type, ir.VoidType): return 0 return 4 def _resolve_opaque_struct(self, llvm_type: ir.Type) -> ir.Type: """尝试从 Gen.structs 中查找已解析的同名 struct，解决跨模块 struct 类型对象不一致的问题""" if not isinstance(llvm_type, ir.IdentifiedStructType): return llvm_type if llvm_type.elements is not None and len(llvm_type.elements) > 0: return llvm_type # opaque struct，尝试通过名称在 Gen.structs 中查找已解析的版本 st_name: str try: st_name = llvm_type.name except Exception: return llvm_type if not st_name: return llvm_type # 提取短名称 short_name: str = st_name if '.' in st_name: short_name = st_name.split('.', 1)[1] # 尝试短名称查找 if short_name in self.structs: resolved: ir.IdentifiedStructType = self.structs[short_name] if isinstance(resolved, ir.IdentifiedStructType) and resolved.elements is not None and len(resolved.elements) > 0: return resolved # 尝试全名查找 if st_name in self.structs: resolved: ir.IdentifiedStructType = self.structs[st_name] if isinstance(resolved, ir.IdentifiedStructType) and resolved.elements is not None and len(resolved.elements) > 0: return resolved # 尝试通过导入处理器从 stub 文件加载 struct 定义 import_handler: Any = self._import_handler_ref if import_handler is not None: try: import_handler._TryLoadStructFromStub(short_name, self) except Exception: pass # 加载后再次查找 if short_name in self.structs: resolved = self.structs[short_name] if isinstance(resolved, ir.IdentifiedStructType) and resolved.elements is not None and len(resolved.elements) > 0: return resolved if st_name in self.structs: resolved = self.structs[st_name] if isinstance(resolved, ir.IdentifiedStructType) and resolved.elements is not None and len(resolved.elements) > 0: return resolved return llvm_type def _get_struct_size(self, llvm_type: ir.Type) -> int: if isinstance(llvm_type, ir.IntType): return max(1, llvm_type.width // 8) if isinstance(llvm_type, ir.FloatType): return 4 if isinstance(llvm_type, ir.DoubleType): return 8 if isinstance(llvm_type, ir.PointerType): return self.ptr_size if isinstance(llvm_type, ir.ArrayType): return self._get_struct_size(llvm_type.element) * llvm_type.count if isinstance(llvm_type, ir.LiteralStructType): total: int = 0 max_align: int = 1 for f in llvm_type.fields: fa: int = self._get_align(f) fs: int = self._get_struct_size(f) max_align = max(max_align, fa) if fa > 1: total = (total + fa - 1) // fa * fa total += fs if max_align > 1: total = (total + max_align - 1) // max_align * max_align return total if isinstance(llvm_type, ir.IdentifiedStructType): # 尝试解析 opaque struct 为已注册的版本 llvm_type = self._resolve_opaque_struct(llvm_type) if llvm_type.elements is None or len(llvm_type.elements) == 0: return self.ptr_size # opaque struct, assume pointer size total: int = 0 max_align: int = 1 for f in llvm_type.elements: fa: int = self._get_align(f) fs: int = self._get_struct_size(f) max_align = max(max_align, fa) if fa > 1: total = (total + fa - 1) // fa * fa total += fs if max_align > 1: total = (total + max_align - 1) // max_align * max_align return total return 4 @staticmethod def _strip_unnecessary_quotes(ir_str: str) -> str: def _unquote(m: re.Match) -> str: prefix: str = m.group(1) name: str = m.group(2) if '.' in name: return m.group(0) if re.match(r'^[a-zA-Z_$][a-zA-Z0-9_$]*$', name): return prefix + name return m.group(0) return re.sub(r'([@%])"([^"]+)"', _unquote, ir_str) def finalize(self) -> str: self._set_Vtable_initializers() self._fix_global_var_init() ir_text: str try: ir_text = str(self.module) except TypeError as e: for func in self.module.functions: for block in func.blocks: for instr in block.instructions: try: str(instr) except TypeError as te: pass raise ir_text = self._strip_unnecessary_quotes(ir_text) struct_defs: list[str] = [] struct_names: set[str] = set() for ClassName, struct_type in self.structs.items(): if isinstance(struct_type, ir.IdentifiedStructType): sname: str = struct_type.name sname_ir: str if sname[0].isdigit() or '.' in sname or not sname.replace('_', '').replace('.', '').isalnum(): sname_ir = f'%"{sname}"' else: sname_ir = f'%{sname}' if struct_type.elements is None or len(struct_type.elements) == 0: if ClassName not in self.typedef_int_widths: struct_names.add(sname) struct_defs.append(f'{sname_ir} = type opaque') continue elems: str = ', '.join(str(e) for e in struct_type.elements) if struct_type.packed: struct_defs.append(f'{sname_ir} = type <{{ {elems} }}>') else: struct_defs.append(f'{sname_ir} = type {{ {elems} }}') struct_names.add(sname) if struct_defs: lines: list[str] = ir_text.split('\n') filtered: list[str] = [] for line in lines: stripped: str = line.strip() skip: bool = False for name in struct_names: patterns: list[str] if name[0].isdigit() or '.' in name or not name.replace('_', '').replace('.', '').isalnum(): patterns = [f'%"{name}" = type', f'%"{name}"=type', f'%{name} = type', f'%{name}=type'] else: patterns = [f'%{name} = type', f'%{name}= type', f'%{name}=type'] for p in patterns: if stripped.startswith(p): skip = True break if skip: break if not skip: filtered.append(line) ir_text = '\n'.join(filtered) header_end: int = ir_text.find('\ndefine') if header_end == -1: header_end = ir_text.find('\ndeclare') if header_end == -1: header_end = ir_text.find('\n@') if header_end == -1: header_end = len(ir_text) insert_pos: int = ir_text.rfind('\n', 0, header_end) if insert_pos == -1: insert_pos = header_end struct_block: str = '\n'.join(struct_defs) + '\n' ir_text = ir_text[:insert_pos + 1] + struct_block + ir_text[insert_pos + 1:] for name in struct_names: if name[0].isdigit() or '.' in name: ir_text = re.sub( r'%' + re.escape(name) + r'(?=[^a-zA-Z0-9_$\.]|$)', r'%"' + name + r'"', ir_text ) return ir_text def _generate_structs(self) -> None: all_classes: set[str] = set(self.class_methods.keys()) | set(self.class_members.keys()) preserved_structs: dict[str, ir.IdentifiedStructType] = {} for name, st in self.structs.items(): if name not in all_classes: preserved_structs[name] = st elif isinstance(st, ir.IdentifiedStructType): preserved_structs[name] = st self.structs.clear() for name, st in preserved_structs.items(): self.structs[name] = st # Step 1: 先为所有类创建空的 struct，确保后面可以正确引用 all_classes = set(self.class_methods.keys()) | set(self.class_members.keys()) for ClassName in all_classes: is_packed: bool = ClassName in self.class_packed if self.SymbolTable: Entry = self.SymbolTable.lookup(ClassName) if Entry and Entry.IsExceptionClass: continue # 注意：类名可能与 CEnum 成员名冲突（如 ASTKind.Module 枚举成员与 Module 类同名） # 如果 ClassName 在 class_methods 中，表明是 _EmitClassLlvm 显式处理的常规类， # 不应被 IsEnum/IsTypedef 检查跳过 if Entry and Entry.IsEnum and ClassName not in self.class_methods: if not Entry.IsRenum: continue if Entry and Entry.IsTypedef and ClassName not in self.class_methods: if Entry.BaseType and not isinstance(Entry.BaseType, (type(None),)): if not isinstance(Entry.BaseType, (_t._CTypedef,)): continue if ClassName in self.structs: if is_packed: self.structs[ClassName].packed = True continue # 修复跨模块类型定义冲突：如果类是从其他模块导入的（已在 class_sha1_map 注册）， # 必须使用导入的 source_sha1 作为前缀，而非本地模块的 sha1。 # 否则会创建缺少基类字段（如 GSListNode.Next）的本地类型定义， # 导致字段索引错位 → 访问违规崩溃。 _imported_sha1: str = self.class_sha1_map.get(ClassName, '') if _imported_sha1: mangled_name: str = f"{_imported_sha1}.{ClassName}" else: mangled_name: str = self._mangle_name(ClassName) struct_type: ir.IdentifiedStructType = ir.IdentifiedStructType(self.module, mangled_name, packed=is_packed) self.structs[ClassName] = struct_type # Step 2: 解析跨模块的成员类型 for ClassName, annotations in self.class_member_annotations.items(): if ClassName not in self.class_members: continue for i, (member_name, member_type) in enumerate(self.class_members[ClassName]): if member_name in annotations: annotation: Any = annotations[member_name] ResolvedType: ir.Type | None = None if isinstance(annotation, ast.Attribute): ClassTypeName: str = annotation.attr if ClassTypeName in self.structs: ResolvedType = self.structs[ClassTypeName] elif isinstance(annotation, ast.BinOp) and isinstance(annotation.op, ast.BitOr): left: Any = annotation.left if isinstance(left, ast.Attribute): ClassTypeName: str = left.attr if ClassTypeName in self.structs: ResolvedType = self.structs[ClassTypeName] if ResolvedType: self.class_members[ClassName][i] = (member_name, ResolvedType) struct_name_map: dict[str, ir.IdentifiedStructType] = {} for struct_name, struct in self.structs.items(): try: struct_name_map[struct.name] = struct except AssertionError: struct_name_map[struct_name] = struct orig: Any = getattr(struct, '_original_name', None) if orig: struct_name_map[orig] = struct # Step 3: 更新成员类型，确保使用正确的 mangled struct 引用 for ClassName in all_classes: if ClassName not in self.class_members: continue for i, (member_name, member_type) in enumerate(self.class_members[ClassName]): if isinstance(member_type, ir.PointerType): pointee: ir.Type = member_type.pointee if isinstance(pointee, ir.IdentifiedStructType): pname: str | None try: pname = pointee.name except AssertionError: pname = None struct: ir.IdentifiedStructType | None = struct_name_map.get(pname) if pname else None if struct is None: orig: Any = getattr(pointee, '_original_name', None) struct = struct_name_map.get(orig) if orig else None if struct is not None: self.class_members[ClassName][i] = (member_name, ir.PointerType(struct)) else: raw_name: str = pname or '' if raw_name.startswith('struct.'): raw_name = raw_name[7:] new_struct: ir.IdentifiedStructType = self._get_or_create_struct(raw_name) self.class_members[ClassName][i] = (member_name, ir.PointerType(new_struct)) elif isinstance(member_type, ir.IdentifiedStructType): mname: str | None try: mname = member_type.name except AssertionError: mname = None struct: ir.IdentifiedStructType | None = struct_name_map.get(mname) if mname else None if struct is None: orig: Any = getattr(member_type, '_original_name', None) struct = struct_name_map.get(orig) if orig else None if struct is not None: self.class_members[ClassName][i] = (member_name, struct) else: raw_name: str = mname or '' if raw_name.startswith('struct.'): raw_name = raw_name[7:] new_struct: ir.IdentifiedStructType = self._get_or_create_struct(raw_name) self.class_members[ClassName][i] = (member_name, new_struct) # Step 4: 创建最终的 structs 并设置正确的成员类型 for ClassName in all_classes: if self.SymbolTable: Entry = self.SymbolTable.lookup(ClassName) if Entry and Entry.IsExceptionClass: continue # 注意：类名可能与 CEnum 成员名冲突（如 ASTKind.Constant 枚举成员与 Constant 类同名） # 如果 ClassName 在 class_methods 中，表明是 _EmitClassLlvm 显式处理的常规类， # 不应被 IsEnum 检查跳过（与 Step 1 的守卫保持一致） if Entry and Entry.IsEnum and ClassName not in self.class_methods: if not Entry.IsRenum: continue existing_st: ir.IdentifiedStructType | None = self.structs.get(ClassName) if isinstance(existing_st, ir.IdentifiedStructType) and existing_st.elements is not None and len(existing_st.elements) > 0: # 治本修复：检查 struct body 是否不完整（元素数少于 class_members + vtable 预期）。 # 常见于跨模块继承：子类 struct 在父类 class_members 加载前从 stub 生成， # stub 中的定义可能不完整或类型不正确（如 GSList* 代替 AST*、i8* 代替 i32）。 # 此处检测到不完整后清除 _elements 和 stub 缓存，让后续代码重新从 stub 加载。 _has_vtable_precheck: bool = ClassName in self.class_vtable or ClassName in self._cross_module_vtable_classes if not _has_vtable_precheck: _p_pre: str | None = self.class_parent.get(ClassName) while _p_pre: if _p_pre in self.class_vtable or _p_pre in self._cross_module_vtable_classes: _has_vtable_precheck = True break _p_pre = self.class_parent.get(_p_pre) _expected_count_pre: int = len(self.class_members.get(ClassName, [])) + (1 if _has_vtable_precheck else 0) # has_vtable 时，首字段必须是 i8*（vtable 指针）。 # 若首字段非指针（如 i8 占位符），struct body 不完整，需清除重新加载。 _vtable_first_ok: bool = True if _has_vtable_precheck and len(existing_st.elements) > 0: _vtable_first_ok = isinstance(existing_st.elements[0], ir.PointerType) # 检测 T* 占位类型（未特化的泛型类型参数）。 # 当 struct 包含 T* 字段时（如 BasicBlock 继承 GSListNode[BasicBlock] 但 stub 未特化）， # 说明 stub 使用了未特化的基类，需清除重新生成。 _has_t_placeholder_pre: bool = False for _elem_pre in existing_st.elements: if isinstance(_elem_pre, ir.PointerType) and isinstance(_elem_pre.pointee, ir.IdentifiedStructType): _pname_pre: str = _elem_pre.pointee.name _short_pre: str = _pname_pre.rsplit('.', 1)[-1] if '.' in _pname_pre else _pname_pre if _short_pre == 'T': _has_t_placeholder_pre = True break if len(existing_st.elements) >= _expected_count_pre and _vtable_first_ok and not _has_t_placeholder_pre: if ClassName in self.class_packed and not existing_st.packed: existing_st.packed = True continue # struct body 不完整，清除 _elements 和 stub 缓存以便重新加载 existing_st._elements = None # 同时清除 sha1 全名 key 的 _elements： # self.structs 中可能同时存在 'Value'(短名) 和 'f9e36e2cd6fa659f.Value'(sha1全名) 两个 key， # _TryLoadStructFromStub 调用 _get_or_create_struct 时会返回 sha1全名 key 的 struct。 # 若只清除短名 key 的 _elements，sha1全名 key 的 struct 仍保持错误 body（is_opaque=False）， # 导致 _TryLoadStructFromStub 跳过 set_body，struct 保持不完整字段数。 _imported_sha1_pre: str = self.class_sha1_map.get(ClassName, '') if _imported_sha1_pre: _full_key_pre: str = f"{_imported_sha1_pre}.{ClassName}" _full_st_pre: ir.IdentifiedStructType | None = self.structs.get(_full_key_pre) if _full_st_pre is not None and isinstance(_full_st_pre, ir.IdentifiedStructType): _full_st_pre._elements = None _import_handler_pre: Any = self._import_handler_ref if _import_handler_pre is not None: _cache_key_pre: tuple = (id(self), ClassName) if _cache_key_pre in _import_handler_pre._struct_Load_cache: del _import_handler_pre._struct_Load_cache[_cache_key_pre] # 同时清除 sha1全名 key 的 stub 缓存 if _imported_sha1_pre: _cache_key_full_pre: tuple = (id(self), f"{_imported_sha1_pre}.{ClassName}") if _cache_key_full_pre in _import_handler_pre._struct_Load_cache: del _import_handler_pre._struct_Load_cache[_cache_key_full_pre] has_vtable: bool = ClassName in self.class_vtable or ClassName in self._cross_module_vtable_classes if not has_vtable: p: str | None = self.class_parent.get(ClassName) while p: if p in self.class_vtable or p in self._cross_module_vtable_classes: has_vtable = True self.class_vtable.add(ClassName) break p = self.class_parent.get(p) has_bitfield: bool = ClassName in self.class_member_bitfields and any( self.class_member_bitfields[ClassName].get(name, 0) > 0 for name, _ in self.class_members.get(ClassName, []) ) all_members: list[tuple[str, ir.Type]] = self.class_members.get(ClassName, []) # 跳过正在发射中且成员尚未填充的类（递归特化时避免过早设置空 body） if not all_members and not has_vtable and ClassName in self._classes_in_progress: continue # 字段收集期间触发的嵌套 _generate_structs：class_members 可能不完整， # set_body 只能调用一次，跳过等字段收集完成后再设置 body if ClassName in self._collecting_members_set: continue all_bitfield: bool = all( self.class_member_bitfields.get(ClassName, {}).get(name, 0) > 0 for name, _ in all_members ) if all_members else False mangled_name: str = self._mangle_name(ClassName) member_types: list[ir.Type] if has_bitfield and all_bitfield: total_bits: int = sum(self.class_member_bitfields.get(ClassName, {}).get(name, 0) for name, _ in all_members) storage_type: ir.IntType if total_bits <= 8: storage_type = ir.IntType(8) elif total_bits <= 16: storage_type = ir.IntType(16) elif total_bits <= 32: storage_type = ir.IntType(32) else: storage_type = ir.IntType(64) member_types = [storage_type] bitfield_offsets: dict[str, int] = {} current_bit_offset: int = 0 for name, _ in all_members: bit_width: int = self.class_member_bitfields.get(ClassName, {}).get(name, 0) bitfield_offsets[name] = current_bit_offset current_bit_offset += bit_width self.class_member_bitoffsets[ClassName] = bitfield_offsets else: member_types = [] if has_vtable: member_types.append(ir.PointerType(ir.IntType(8))) if ClassName in self.class_members: for _, member_type in self.class_members[ClassName]: if member_type is None: member_type = ir.IntType(32) member_types.append(member_type) else: if has_vtable: # has_vtable 但 class_members 为空（跨模块导入类）： # 保持 member_types 为空（[i8*] 占位会导致 stub 加载跳过， # 因为 set_body 后 is_opaque=False）。让 struct 保持 opaque， # 由 _TryLoadStructFromStub 设置完整 body。 member_types = [] else: # 无 vtable 且 class_members 为空：常见于 register_method 早期 # 调用 _generate_structs（此时 class_members[ClassName]=[] 但尚未 # 填充实际字段）。保持 opaque，避免 set_body(*[i8]) 永久损坏 struct # （llvmlite 的 set_body 只能调用一次）。后续 _generate_structs 调用 # 会从 class_members 或 stub 设置正确 body。 member_types = [] # 获取之前创建的 struct 并设置成员 struct_type: ir.IdentifiedStructType = self.structs[ClassName] if ClassName in self.class_packed: struct_type.packed = True # 只在未设置 body 时设置，避免重复定义错误 if struct_type.elements is None: # 跨模块 struct 的 class_members 可能不完整（当前模块只解析了部分字段）， # 优先从 stub.ll 加载完整定义。set_body 只能对 opaque struct 调用一次， # 若用不完整 class_members 设置 body，后续无法修正，会导致 GEP 越界。 # 但本地定义的类（_classes_in_progress）不从 stub 加载，因为 stub 可能 # 来自同名导入类，其 vtable 状态与本地定义不同（@t.NoVTable 冲突） import_handler: Any = self._import_handler_ref if import_handler is not None and ClassName not in self._classes_in_progress: try: # 传入 source_sha1 确保从正确的 stub 文件加载完整定义 _src_sha1: str = self.class_sha1_map.get(ClassName, '') import_handler._TryLoadStructFromStub(ClassName, self, source_sha1=_src_sha1 or None) except Exception: pass struct_type = self.structs.get(ClassName, struct_type) # 检测 stub body 中的 T* 占位类型（未特化的泛型类型参数）。 # 若 stub 使用了未特化的基类（如 GSListNode 而非 GSListNode[BasicBlock]）， # 清除 _elements 让 set_body 用正确的 class_members 重新设置。 if struct_type.elements is not None and member_types: _has_t_placeholder_post: bool = False for _elem_post in struct_type.elements: if isinstance(_elem_post, ir.PointerType) and isinstance(_elem_post.pointee, ir.IdentifiedStructType): _pname_post: str = _elem_post.pointee.name _short_post: str = _pname_post.rsplit('.', 1)[-1] if '.' in _pname_post else _pname_post if _short_post == 'T': _has_t_placeholder_post = True break if _has_t_placeholder_post: struct_type._elements = None if struct_type.elements is None: # 防御性检查：member_types 为空时不调用 set_body。 # set_body(*[]) 会设置 elements=() 使 is_opaque=False， # 后续无法再次 set_body（llvmlite 限制），导致跨模块类型永久损坏。 # 根因：register_method 在 class_members[ClassName]=[] 时立即调用 # _generate_structs，此时 member_types 为空。保持 opaque 状态， # 让后续 _TryLoadStructFromStub 能正确设置 body。 if member_types: struct_type.set_body(*member_types) def _create_Vtable_globals(self) -> None: for ClassName, methods in self.class_methods.items(): if ClassName in self.Vtables: continue if not methods: continue if ClassName not in self.class_vtable and ClassName not in self._cross_module_vtable_classes: continue # 跳过正在发射中的类：它们的方法列表可能还不完整（如继承方法已添加但自有方法未添加）， # 此时创建 vtable 会导致大小不匹配。这些类的 vtable 会在其 _EmitClassLlvm 完成后 # 由 _create_vtable_for_class 显式创建，或在模块级 _create_Vtable_globals 调用中创建。 if ClassName in self._classes_in_progress: continue # 跨模块虚表过滤：_precollect_vtable_state 会将所有 includes 的有方法类同时加入 # _shared_class_vtable 和 _shared_cross_module_vtable，导致 class_vtable 与 # _cross_module_vtable_classes 内容相同，无法用以区分本模块类与跨模块类。 # _generate_structs 会为所有 class_methods 的类创建空 struct type，导致 self.structs # 也包含所有类。过滤条件是 self.functions：只考虑本模块定义的函数（define，有函数体）， # 跳过跨模块的 declare（无函数体）。跨模块类的 declare 通过 HandlesImports 加入 # self.functions（短名如 "MemManager.alloc"），但其 is_declaration=True。 # 若只存在 declare 而无 define，说明本模块未定义该类，虚表应由定义模块创建。 # vtable linkage='internal'，跨模块调用通过对象的 vtable 指针（首字段）完成分派， # 不依赖本模块的 vtable 全局变量。 has_local_method: bool = False prefix: str = f"{ClassName}." for func_name, func_obj in self.functions.items(): if func_name.startswith(prefix): # 跳过跨模块的 declare（无函数体），只考虑本模块定义的函数 if not getattr(func_obj, 'is_declaration', False): has_local_method = True break if not has_local_method: continue VtableType: ir.ArrayType = ir.ArrayType(ir.PointerType(ir.IntType(8)), len(methods)) Vtable: ir.GlobalVariable = ir.GlobalVariable(self.module, VtableType, name=self._mangle_name(f"{ClassName}_Vtable")) Vtable.initializer = ir.Constant(VtableType, [ir.Constant(ir.PointerType(ir.IntType(8)), None)] * len(methods)) Vtable.linkage = 'internal' self.Vtables[ClassName] = Vtable def _create_vtable_for_class(self, ClassName: str) -> None: """为单个类创建 vtable（用于 _EmitClassLlvm 中当前类的方法已全部注册后）。""" methods: list = self.class_methods.get(ClassName, []) if not methods: return if ClassName not in self.class_vtable and ClassName not in self._cross_module_vtable_classes: return _vtable_name: str = self._mangle_name(f"{ClassName}_Vtable") # 如果虚表已在导入阶段创建（方法列表不完整，缺少继承方法），删除旧虚表 if ClassName in self.Vtables: _old_vtable = self.Vtables[ClassName] _old_name = _old_vtable.name if _old_name in self.module.globals: del self.module.globals[_old_name] # llvmlite 的 NameScope._useset 追踪所有已使用的名字， # del module.globals[name] 不会从 _useset 移除， # 导致再次创建同名 GlobalVariable 时 scope.register() 报 DuplicatedNameError self.module.scope._useset.discard(_old_name) del self.Vtables[ClassName] # 防御性：如果全局变量已存在但不在 Vtables 字典中，也删除 if _vtable_name in self.module.globals: del self.module.globals[_vtable_name] self.module.scope._useset.discard(_vtable_name) VtableType: ir.ArrayType = ir.ArrayType(ir.PointerType(ir.IntType(8)), len(methods)) Vtable: ir.GlobalVariable = ir.GlobalVariable(self.module, VtableType, name=_vtable_name) Vtable.initializer = ir.Constant(VtableType, [ir.Constant(ir.PointerType(ir.IntType(8)), None)] * len(methods)) Vtable.linkage = 'internal' self.Vtables[ClassName] = Vtable def _fix_global_var_init(self) -> None: for gv_name, gv in list(self.module.globals.items()): if not isinstance(gv, ir.GlobalVariable): continue if gv.linkage in ('external', 'extern_weak'): continue needs_fix: bool = False if gv.initializer is None: needs_fix = True elif hasattr(gv.initializer, 'constant') and isinstance(gv.initializer.constant, _Undefined): needs_fix = True elif isinstance(gv.initializer, ir.Constant): if isinstance(gv.initializer.constant, list): if any(hasattr(c, 'constant') and isinstance(c.constant, _Undefined) for c in gv.initializer.constant): needs_fix = True if not needs_fix: continue gv.initializer = ir.Constant(gv.value_type, None) if gv_name.startswith('str_const_') or gv_name.endswith('_Vtable') or gv_name.endswith('_str'): gv.linkage = 'internal' def _set_Vtable_initializers(self) -> None: for ClassName, methods in self.class_methods.items(): if ClassName not in self.Vtables: continue if not methods: continue struct_type: ir.IdentifiedStructType | None = self.structs.get(ClassName) if struct_type is None: continue Vtable: ir.GlobalVariable = self.Vtables[ClassName] Vtable_entries: list[ir.Constant] = [] for MethodName in methods: short_name: str = MethodName.split('.')[-1] if '.' in MethodName else MethodName full_MethodName: str = f"{ClassName}.{short_name}" func: ir.Function | None = None if full_MethodName in self.functions: func = self.functions[full_MethodName] if func is None: parent_cls: str | None = self.class_parent.get(ClassName) while parent_cls: parent_full: str = f"{parent_cls}.{short_name}" if parent_full in self.functions: func = self.functions[parent_full] break parent_cls = self.class_parent.get(parent_cls) if func is None: Vtable_entries.append(ir.Constant(ir.PointerType(ir.IntType(8)), None)) continue Vtable_entries.append(func.bitcast(ir.PointerType(ir.IntType(8)))) Vtable.initializer = ir.Constant(Vtable.type.pointee, Vtable_entries)