[hellogcc] Re: Re: Re: [投稿] LLVM Introduction - How to use JIT 2/3
- From: 陳韋任 <chenwj@xxxxxxxxxxxxxx>
- To: hellogcc@xxxxxxxxxxxxx
- Date: Sat, 22 Oct 2011 23:11:42 +0800
> 恩，确实是可以这么写。
> 对应高级语言，module是对应C++的class的吧，其实是class的子集，是这样么？一个class有多个func，生成一个含有多个func的module。这个我也没有搞的十分明白。
Module 在 LLVM 中是實現成一個 C++ class，你可以看 include/llvm/Module.h
和 lib/VMCore/Module.cpp。
我不懂你說的 class 的子集是什麼意思。但是你可以看到底下我節錄出來的代碼，
對 Module 應該會比較有清晰的概念。
--------------------- include/llvm/Module.h ---------------------------
class Module {
public:
typedef iplist<GlobalVariable> GlobalListType;
typedef iplist<Function> FunctionListType;
typedef iplist<GlobalAlias> AliasListType;
Constant *getOrInsertFunction(StringRef Name, const FunctionType *T,
AttrListPtr AttributeList);
Constant *getOrInsertFunction(StringRef Name, const FunctionType *T);
private:
FunctionListType FunctionList; ///< The Functions in the module
-----------------------------------------------------------------------
--------------------- lib/VMCore/Module.cpp ---------------------------
Constant *Module::getOrInsertFunction(StringRef Name,
const FunctionType *Ty,
AttrListPtr AttributeList) {
// See if we have a definition for the specified function already.
GlobalValue *F = getNamedValue(Name);
if (F == 0) {
// Nope, add it
Function *New = Function::Create(Ty, GlobalVariable::ExternalLinkage, Name);
if (!New->isIntrinsic()) // Intrinsics get attrs set on construction
New->setAttributes(AttributeList);
FunctionList.push_back(New);
return New; // Return the new prototype.
}
...
}
Constant *Module::getOrInsertFunction(StringRef Name,
const FunctionType *Ty) {
AttrListPtr AttributeList = AttrListPtr::get((AttributeWithIndex *)0, 0);
return getOrInsertFunction(Name, Ty, AttributeList);
}
-----------------------------------------------------------------------
--
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
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