[LLVMdev] compiling a call to function in compiler

[Rob Nikander]

On Mon, Jan 17, 2011 at 8:36 PM, Eric Christopher <echristo at apple.com> wrote:
>
>    id testfunc(id a, id b) { ... }
>    ...
>    FunctionType *fn_type = FunctionType::get(id_type, argtypes, false);
>    Value *fn = ConstantExpr::getIntToPtr(ConstantInt::get(int64_type,
> reinterpret_cast<int64_t>(testfunc)), fn_type);
>    return builder.CreateCall2(fn, arg0val, arg1val);   // <--
> assertion fails here
>
> What am I doing wrong?  I can paste more code if needed.
>
> One of the types doesn't match the types of what you are trying to pass.
> You should debug which one it is and why the types aren't matching what
> you think they should be.

Okay, found it.  My function was of type: "i8* (i8*, i8*)".  I thought
that was okay, but now I see it needed to be "i8* (i8*, i8*)*" -- ie,
a pointer to the former type.

Rob