llvm dev - Jun 2012 - [LLVMdev] Why does llvm bitcast a struct pointer to an integer pointer?

I have some C code that does a memcpy (though it doesn't use the memcpy
instrinsic at all) on structure like:

  x = y;

Where x and y are of the same structure type. My question is in the LLVM
code, it firsts get the address from the GEP using the struct type but then
before the load and store, it bitcasts this to i64 for some reason?

Why does this occur in the IR? Doesn't seem like the IR would care either
way.

Just to clarify any confusion, I'm not talking about the pointer width,
I'm
talking about the type that the pointer is pointing to.

Thanks.

Also, is there anyway to make LLVM do an element by element copy in this
case?
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