llvm clang JIT 程序 5.0.2

windows vs2015 based：网上各种 jit demo已经是无效了。至少在3.9 以后的版本都是无法直接使用的。实际使用情况是这样的：

使用llvm自带HowToUseJITdemo修改：代码如下，并需要添加lib：

..\..\Release\lib\LLVMIRReader.lib

..\..\Release\lib\LLVMAsmParser.lib

..\..\Release\lib\LLVMMCJIT.lib

以下是代码直接cpp 贴过来的。

#include "llvm/ADT/STLExtras.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/IR/Argument.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Type.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/ExecutionEngine/MCJIT/MCJIT.h"

#include <algorithm>
#include <cassert>
#include <memory>
#include <vector>
#include <system_error>

#include <string>

using namespace llvm;

int main() {
   //MyMethod();
   InitializeNativeTarget();
   InitializeNativeTargetAsmPrinter();
   //InitializeAllTargets();

   MCJIT::Register();
   LLVMContext Context;
   SMDiagnostic Err;
   std::string error_code;
   //Module *mod = llvm::parseIRFile("hello.bc", Err, context);
   //std::unique_ptr<Module> Owner = make_unique<Module>("g:/hello.bc", Context);
   std::unique_ptr<Module> Owner = parseIRFile("g:/hello.bc", Err, Context);
   Module *M = Owner.get();
   /*EngineBuilder eb = EngineBuilder(mod);
   eb.setEngineKind(EngineKind::JIT);
   eb.setErrorStr(&error_code);
   ExecutionEngine* EE = eb.create();*/

   //Function *HelloF = cast<Function>(M->getOrInsertFunction("main", Type::getInt32Ty(Context)));
   Function *HelloF = M->getFunction("main");
   //Function* func = NULL;
   //func = mod->getFunction("_Z13CalcVaildRowsPPii");
   /*if (func == NULL)
   {
       std::cout << "--Night-- get function error.." << std::endl;
       return 0;
   }*/
   //BasicBlock *BB = BasicBlock::Create(Context, "EntryBlock", HelloF);

   std::string ErrStr;
   ExecutionEngine* EE(NULL);
   //EE = EngineBuilder(std::move(Owner)).create();
   //
   RTDyldMemoryManager* RTDyldMM = new SectionMemoryManager();
   EE = EngineBuilder(std::move(Owner))
       .setEngineKind(EngineKind::JIT)
       .setErrorStr(&ErrStr)
       .setVerifyModules(true)
//        .setMCJITMemoryManager(std::unique_ptr<RTDyldMemoryManager>(RTDyldMM))
//        .setOptLevel(CodeGenOpt::Default)
       .create();
   //
   EE->finalizeObject();
   std::vector<GenericValue> noargs;
   GenericValue gv = EE->runFunction(HelloF, noargs);

   /*void* jitAddr = EE->getPointerToFunction(func);
   EE->freeMachineCodeForFunction(func);*/
   delete EE;
   llvm_shutdown();
   return 0;
}

llvm clang JIT 程序 5.0.2

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