Function LLVMGetOperandBundleAtIndex 

pub unsafe extern "C" fn LLVMGetOperandBundleAtIndex(
    C: LLVMValueRef,
    Index: c_uint,
) -> LLVMOperandBundleRef

Obtain the operand bundle attached to this instruction at the given index. Use LLVMDisposeOperandBundle to free the operand bundle.

This only works on llvm::CallInst and llvm::InvokeInst instructions.