|---| | [![](https://www.tensorflow.org/images/GitHub-Mark-32px.png) View source on GitHub](https://github.com/tensorflow/probability/blob/v0.25.0/tensorflow_probability/python/experimental/auto_batching/instructions.py#L291-L350) | A control flow graph (CFG). #### View aliases **Main aliases** [`tfp.experimental.auto_batching.frontend.instructions.ControlFlowGraph`](https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/auto_batching/instructions/ControlFlowGraph), [`tfp.experimental.auto_batching.frontend.st.inst.ControlFlowGraph`](https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/auto_batching/instructions/ControlFlowGraph), [`tfp.experimental.auto_batching.frontend.stack.inst.ControlFlowGraph`](https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/auto_batching/instructions/ControlFlowGraph), [`tfp.experimental.auto_batching.stack_optimization.inst.ControlFlowGraph`](https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/auto_batching/instructions/ControlFlowGraph), [`tfp.experimental.auto_batching.stackless.inst.ControlFlowGraph`](https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/auto_batching/instructions/ControlFlowGraph)
tfp.experimental.auto_batching.instructions.ControlFlowGraph( blocks )


| ## Args || |---|---| | `blocks` | Python list of `Block` objects, the content of the CFG. Any terminator instructions of said `Block` objects should refer to other `Block`s in the same CFG. Otherwise, downstream passes or staging may fail. |



| ## Attributes || |---|---| | `blocks` |

|
## Methods ### `block` [View source](https://github.com/tensorflow/probability/blob/v0.25.0/tensorflow_probability/python/experimental/auto_batching/instructions.py#L315-L324) block( index ) Returns the `Block` given by the input `index`.


| Args || |---|---| | `index` | A Python `int`. |



| Returns || |---|---| | `block` | The `Block` at that location in the block list. |
### `block_index` [View source](https://github.com/tensorflow/probability/blob/v0.25.0/tensorflow_probability/python/experimental/auto_batching/instructions.py#L326-L337) block_index( block ) Returns the `int` index of the given `Block`.


| Args || |---|---| | `block` | The block to look up. If `None`, returns the exit index. |



| Returns || |---|---| | `index` | Python `int`, the index of the requested block. |
### `enter_block` [View source](https://github.com/tensorflow/probability/blob/v0.25.0/tensorflow_probability/python/experimental/auto_batching/instructions.py#L343-L345) enter_block() Returns the entry `Block`. ### `exit_index` [View source](https://github.com/tensorflow/probability/blob/v0.25.0/tensorflow_probability/python/experimental/auto_batching/instructions.py#L339-L341) exit_index() Returns the `int` index denoting "exit this CFG".