如何为llvm IR调用指令创建struct参数？

Question

I want to insert a function call instruction into an IR file. But there are some problems when I tried to create a struct parameter.

function:

 "__myfun(int addr,struct buginfor struct_var)" 

the struct is:

 typedef struct buginfor{
    int line;
    char *str1;
    char *str2;
 };

my code:

Value* args[] = { addr };

// struct parameter create
Value *struct_line = ConstantInt::get(IntegerType::get(M->getContext(), 64), 4);
Value *struct_filename= llvm::PointerType::get(IntegerType::get(M->getContext(), 8),20);//20 bytes
Value *struct_dir= llvm::PointerType::get(IntegerType::get(M->getContext(), 8),100);//100 tytes
Type* struct_Ty[] = { struct_line->getType(),struct_filename->getType(),struct_dir->getType()};
llvm::StructType * struct_var= llvm::StructType::create(M->getContext(),"buginfor");
struct_var->setBody(struct_Ty);
Value* arg2 = struct_var;

Type* argsTy[] = { addr->getType(),arg2->getType()};
FunctionType *funcTy = FunctionType::get(Type::getVoidTy(M->getContext()), ArrayRef<Type*>(argsTy, 2), false);
Function *hook;
hook = cast<Function>( M->getOrInsertFunction("__myfun", funcTy, attribute(M)));
CallInst *newInst = CallInst::Create(hook, ArrayRef<Value *>(args, 1), "");

anyone can tell me the right way to create a struct parameter like buginfor?

ps: I want to get the three parameter and make it a llvm IR constantstruct

          DILocation Loc(N);    // DILocation is in DebugInfo.h
          unsigned Line = Loc.getLineNumber();
          StringRef File = Loc.getFilename();
          StringRef Dir = Loc.getDirectory();

Answer 1

It seems like you'll want to create a ConstantStruct or an undef struct and then insert values in to it with insertvalue instructions. Depending on if you have constants or runtime values.