code: def log_softmax(input, dim=None, _stacklevel=3, dtype=None):
      if dtype:
          input = ivy.astype(ivy.array(input), ivy.as_ivy_dtype(dtype))
      if dim is None:
          dim = -1
      return ivy.log_softmax(input, axis=dim)
  
imports: import ivy
  from ivy.func_wrapper import with_unsupported_dtypes, with_supported_dtypes
  from ivy.functional.frontends.torch.func_wrapper import to_ivy_arrays_and_back
label_desc: Use image node_id 16 for calling a global function with example usage: log_softmax(input, dim, _stacklevel, dtype) and returns: ivy