[backend]增加了对全局数组的访存地址展开

src/AddressCalculationExpansion.cpp

@@ -57,11 +57,22 @@ bool AddressCalculationExpansion::run() {
                         }
                     }
                 } else if (GlobalValue* globalValue = dynamic_cast<GlobalValue*>(basePointer)) {
-                    std::cerr << "Warning: GlobalValue dimension handling needs explicit implementation for GEP expansion. Skipping GEP for: ";
-                    SysYPrinter::printValue(globalValue);
-                    std::cerr << "\n";
-                    ++it;
-                    continue;
+                    // 遍历 GlobalValue 的所有维度操作数
+                    for (const auto& use_ptr : globalValue->getDims()) {
+                        Value* dimValue = use_ptr->getValue();
+                        // 将维度值转换为常量整数
+                        if (ConstantInteger* constVal = dynamic_cast<ConstantInteger*>(dimValue)) {
+                            dims.push_back(constVal->getInt());
+                        } else {
+                            // 如果维度不是常量整数，则无法处理。
+                            // 根据 IR.h 中 GlobalValue 的构造函数，这种情况不应发生，但作为安全检查是好的。
+                            std::cerr << "Warning: GlobalValue dimension is not a constant integer. Skipping GEP expansion for: ";
+                            SysYPrinter::printValue(globalValue);
+                            std::cerr << "\n";
+                            dims.clear(); // 清空已收集的部分维度信息
+                            break;
+                        }
+                    }
                 } else {
                     std::cerr << "Warning: Base pointer is not AllocaInst/GlobalValue or its array dimensions cannot be determined for GEP expansion. Skipping GEP for: ";
                     SysYPrinter::printValue(basePointer);