class SyntaxTree::Index::ISeqBackend

def find_constant_path(insns, index)
  index -= 1 while index >= 0 &&
    (
      insns[index].is_a?(Integer) ||
        (
          insns[index].is_a?(Array) &&
            %i[swap topn].include?(insns[index][0])
        )
    )
  insn = insns[index]
  if insn.is_a?(Array) && insn[0] == :opt_getconstant_path
    # In this case we're on Ruby 3.2+ and we have an opt_getconstant_path
    # instruction, so we already know all of the symbols in the nesting.
    [index - 1, insn[1]]
  elsif insn.is_a?(Symbol) && insn.match?(/\Alabel_\d+/)
    # Otherwise, if we have a label then this is very likely the
    # destination of an opt_getinlinecache instruction, in which case
    # we'll walk backwards to grab up all of the constants.
    names = []
    index -= 1
    until insns[index].is_a?(Array) &&
            insns[index][0] == :opt_getinlinecache
      if insns[index].is_a?(Array) && insns[index][0] == :getconstant
        names.unshift(insns[index][1])
      end
      index -= 1
    end
    [index - 1, names]
  else
    [index, []]
  end
end