进行了优化，减少了上帝结构体的符号表占用

lib/core/LLVMCG/BaseGen.py

@@ -171,7 +171,7 @@ class BaseGenMixin:
             return existing
         if clean_name in {'typedef', 'CType', 'CVolatile', 'CEnum', 'CUnion', 'CStruct', 'enum', 'REnum', 'renum', 'Void', 'void'}:
             return ir.IntType(8)
-        if hasattr(self, 'SymbolTable') and self.SymbolTable and clean_name in self.SymbolTable:
+        if hasattr(self, 'SymbolTable') and self.SymbolTable and self.SymbolTable.has(clean_name):
             Entry = self.SymbolTable[clean_name]
             if Entry.IsTypedef:
                 resolved_str = self._resolve_typedef(clean_name)
@@ -235,7 +235,7 @@ class BaseGenMixin:
                 return int(llvm_str[1:])
 
         # 2. 再查 SymbolTable（用户定义的 typedef）
-        if hasattr(self, 'SymbolTable') and self.SymbolTable and name in self.SymbolTable:
+        if hasattr(self, 'SymbolTable') and self.SymbolTable and self.SymbolTable.has(name):
             Entry = self.SymbolTable[name]
             if Entry.IsTypedef:
                 if Entry.BaseType: