如何使用llvm-10库在C++中定义LLVM GlobalValue变量？

#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/Module.h"

llvm::Module* module = new llvm::Module("my_module", llvm::getGlobalContext());

llvm::Type* varType = llvm::Type::getInt32Ty(llvm::getGlobalContext()); // 定义变量类型
llvm::Constant* varInitializer = llvm::ConstantInt::get(varType, 42); // 定义变量初始值
llvm::GlobalVariable* var = new llvm::GlobalVariable(*module, varType, false, llvm::GlobalValue::ExternalLinkage, varInitializer, "my_global_var");

llvm::Value* varValue = module->getNamedValue("my_global_var");