小编isl*_*dia的帖子

我开始学习llvm api,我写了第一遍.我的目标是打印函数如何调用彼此.

最近我想在显示屏上添加一些循环信息,以查看函数是否可以多次调用.但是当我尝试使用LoopInfo时,我得到了这个编译错误:

llvm[0]: Compiling cfg.cpp for Debug+Asserts build (PIC)
In file included from cfg.cpp:19:
In file included from /home/llvm-lab/llvm/include/llvm/Pass.h:378:
  /home/llvm-lab/llvm/include/llvm/PassAnalysisSupport.h:56:37: error:
        no member named 'ID' in 'llvm::LoopInfo'
      return addRequiredID(PassClass::ID);
                                  ^
cfg.cpp:33:10: note: in instantiation of function template
      specialization 'llvm::AnalysisUsage::addRequired<llvm::LoopInfo>'
      requested here
      AU.addRequired<LoopInfo>();
         ^
1 error generated.

这是我的代码:

#include "llvm/ADT/Statistic.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/raw_ostream.h"
#include "iostream"
#include "llvm/Pass.h"
#include "llvm/IR/InstIterator.h"
#include <llvm/IR/Instructions.h>
#include <llvm/Analysis/LoopInfo.h>

using namespace llvm;


namespace {
  struct CFG : public FunctionPass {
    static char ID; // Pass …