Function LLVMConstIntOfArbitraryPrecision 

pub unsafe extern "C" fn LLVMConstIntOfArbitraryPrecision(
    IntTy: LLVMTypeRef,
    NumWords: c_uint,
    Words: *const u64,
) -> LLVMValueRef

Obtain a constant value for an integer of arbitrary precision.

@see llvm::ConstantInt::get()