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Fix var duplication bug for graph_to_program_pass #44278

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Merged
merged 1 commit into from
Jul 14, 2022
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Fix var duplication bug for graph_to_program_pass #44278

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15 changes: 14 additions & 1 deletion paddle/fluid/framework/ir/graph_helper.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -578,14 +578,27 @@ void GraphToProgram(const Graph &graph,

VLOG(3) << "Graph to program need convert " << graph.SubGraphsSize()
<< " sub graph";

std::unordered_set<std::string> vars_in_root_block;
for (const proto::VarDesc &var : block->vars()) {
vars_in_root_block.insert(var.name());
}

for (size_t idx = 0; idx < graph.SubGraphsSize(); ++idx) {
// avoid kRootBlockIndex not 0
if (idx == kRootBlockIndex) continue;

block = program_pb.add_blocks();
block->set_idx(idx);
block->set_parent_idx(kRootBlockIndex);
GraphToBlock(*graph.GetSubGraph(idx), block, sort_kind);

Graph *subgraph = graph.GetSubGraph(idx);
subgraph->SetNotOwned<std::unordered_set<std::string>>(
kGraphToProgramVarsToRemove, &vars_in_root_block);

GraphToBlock(*subgraph, block, sort_kind);

subgraph->Erase(kGraphToProgramVarsToRemove);
}
} else {
GraphToBlock(graph, block, sort_kind);
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