o Xi@s\dZddlmZdgZddlZddlZeeZ Gdddej j Z dd d Z dd d ZdS)a%Output fix pass for adding Identity nodes. - Graph inputs are directly used as outputs (without any intermediate nodes). - A value is used multiple times as a graph output (ensuring each output is unique). This ensures compliance with the ONNX specification for valid output configurations. ) annotations OutputFixPassNc@seZdZdZd ddZdS) raCPass for adding Identity nodes to fix invalid output configurations. This pass adds Identity nodes according to the following rules: - If a graph input is directly used as a graph output (without any intermediate nodes), insert an Identity node between them. The ONNX specification does not allow a graph input to be directly used as a graph output without any processing nodes in between. - If a value is used multiple times as graph outputs, insert Identity nodes for each duplicate usage (keeping the first usage unchanged). This ensures each output value is unique, as required by the ONNX specification. This pass processes both the main graph and all subgraphs (e.g., in control flow operators). Example transformations: Direct input-to-output: Before: input -> (direct connection) -> output After: input -> Identity -> output Duplicate outputs: Before: value -> [output1, output2] After: value -> output1, value -> Identity -> output2 .. versionadded:: 0.1.13 modelir.Modelreturnir.passes.PassResultcCsXd}t|jr d}t|jrd}|jD]}t|rd}t|r#d}qtjj||dS)z)Main entry point for the output fix pass.FT)modified)_alias_multi_used_outputsgraph_alias_direct_outputs functionsvaluesirpasses PassResult)selfrrfunctionrT/home/ubuntu/.local/lib/python3.10/site-packages/onnx_ir/passes/common/output_fix.pycall2s  zOutputFixPass.callN)rrrr)__name__ __module__ __qualname____doc__rrrrrrs graph_likeir.Graph | ir.FunctionrboolcCsd}|g|RD]T}t}t|jD]I\}}||vr"||qtjd|gd}|jd}|jd||_|j|_|j |_ |j |j |j |_ | |||j|<td|d}qq |S)zUInsert Identity nodes for values that appear in the graph output list multiple times.FIdentityinputsr_alias_z=Added Identity node for graph output '%s' used multiple timesT) subgraphsset enumerateoutputsaddrnodenameshapetypemetadata_propsupdate doc_stringappendloggerdebug)rrr seenioutput identity_nodeidentity_outputrrrr Fs,    r c Csd}|g|RD]]}g}t|jD]\}}|r"|||fq|D]A\}}tjd|gd}|jd}|j|_|j|_|j |_ |j |j |j |_ |jd|_||||j|<t d|d}q%q |S)z@Insert Identity nodes for graph inputs used directly as outputs.Frrr_origz7Added Identity node for graph input '%s' used as outputT)r!r#r$is_graph_inputr-rr&r'r(r)r*r+r,r.r/) rrr outputs_to_fixr1r2indexr3r4rrrr ks,     r )rrrr)r __future__r__all__loggingonnx_irr getLoggerrr.r InPlacePassrr r rrrrs   .%