Trouble with passing an array as argument to CreateCall()

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Hello All,

I am having a bit of trouble with inserting a function into some IR. My function takes in more than five arguments so I am trying to use the CreateCall(Value * Callee, ArrayRef<Value*> Args, const Twine & Name=””) method.

I believe where I am running into problems is the declaration part where I am using the getOrInsertFunction() method. Here is the code I have written so far:

//Function declaration for “mmap”

/*

Constant *b = M->getOrInsertFunction(“mmap”,

FunctionType::getInt8PtrTy(F.getContext()),

Type::getInt8PtrTy(F.getContext()),

Type::getInt8PtrTy(F.getContext()),

NULL);

Function *mmap = cast(b);

*/

Constant *b = M->getOrInsertFunction(“mmap”,

FunctionType::getInt8PtrTy(F.getContext()),

Type::getInt8PtrTy(F.getContext()),

Type::getInt32Ty(F.getContext()),

Type::getInt32Ty(F.getContext()),

Type::getInt32Ty(F.getContext()),

Type::getInt32Ty(F.getContext()),

Type::getInt32Ty(F.getContext()),

NULL);

Function *mmap = cast(b);

//IRBuilder responsible for inserting instructions into IR

IRBuilder<> builder(inst);

//Inserts the two variables and call for “open”

Value *strPtr = builder.CreateGlobalStringPtr(“/dev/mem”, “.str”);

ConstantInt *open_Argument = builder.getInt32(9437184);

Value *file_desc = builder.CreateCall2(open,strPtr,open_Argument);

//Inserts the 5 variables needed for “mmap”

ConstantInt *Arg1 = builder.getInt32(0);

ConstantInt *Arg2 = builder.getInt32(4096);

ConstantInt *Arg3 = builder.getInt32(3);

ConstantInt *Arg4 = builder.getInt32(1);

ConstantInt *Arg6 = builder.getInt32(1);

//Creates array of values to pass to “mmap”

std::vector<llvm::Value *> putsArgs;

putsArgs.push_back(Arg1);

putsArgs.push_back(Arg2);

putsArgs.push_back(Arg3);

putsArgs.push_back(Arg4);

putsArgs.push_back(file_desc);

putsArgs.push_back(Arg6);

llvm::ArrayRef<llvm::Value *> argsRef(putsArgs);

builder.CreateCall(mmap, putsArgs, “mmap”);

I have written two function declarations, but am unsure of which type I should use because I am passing an array as an argument. Is the function declaration supposed to accept each argument individually or will it be expecting a pointer type if I’m using an array? My assert error is just “Calling a function with a bad signature!”

Thanks for any help!

Josh