[Haskell-cafe] LLVM, type-level?

Hey all, I'm generating a structure definition from input, and would like to generate some LLVM code that can use it. I see an 'alloca' function in LLVM.Core that may do the trick, but takes a static type (Ptr a), which I wouldn't have. Is there a dynamic variant? I'm currently generating a TypeDesc Struct type. Also, is everything under LLVM.Core.* private (not LLVM.Core, but LLVM.Core.Util,etc)? I saw from some blog posts that Core.Util has a function for (I think) getting the a function's parameters, but I can't seem to find a way to access it. Is there another way to get the arguments to a function? Thanks for your help, -Lally