PlaceHolder

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Product Support Status

Product	Supported
Ascend 950PR&950DT products	√
Atlas A3 products	√
Atlas A2 products	√
Atlas 200I/500 A2 inference products	√
Atlas inference products	√
Atlas training products	√

Function Description

Inserts a placeholder for a tensor that will always be fed. The PlaceHolder operator receives the input tensor x, and the shape and data type of the output y are consistent with those of the input x. InferShape copies the input shape to the output, and InferDataType copies the input dtype to the output.

Parameter Description

Parameter Name	Input/Output/Attribute	Description	Data Type	Data Format
x	Input	Input tensor.	TensorType::ALL()	ND
peerIndex	Attribute	Index of the corresponding connected "end" node.	Int, with the default value 0	-
parentId	Attribute	String identifier used to check whether the node comes from a saved parent node.	String, with the default value ""	-
parentOpType	Attribute	Operator type of the original node.	String, with the default value ""	-
anchorIndex	Attribute	Index used to check whether the node comes from a saved anchor.	Int, with the default value 0	-
y	Output	Created placeholder tensor, whose shape and data type are consistent with those of the input x.	TensorType::ALL()	ND

Constraint Description

• PlaceHolder is an internal node of the graph engine. It is automatically inserted at subgraph boundaries by GE engine partitioning (EnginePartitioner). It must be used together with the paired End node and the peerIndex attribute, and cannot be compiled and executed independently in user-built graphs.

Invocation Description

The PlaceHolder operator is a basic operator of the graph engine. It is usually used as a placeholder node in a graph and is not invoked separately.

Invocation Method	Invocation Sample	Description
Graph-mode invocation	test_geir_placeholder	Invokes the PlaceHolder operator by building a graph through the operator IR