onert::compiler::pass::UnusedOperandEliminationPass Class Reference

A pass to eliminate unused operands from the graph. More...

#include <UnusedOperandEliminationPass.h>

Collaboration diagram for onert::compiler::pass::UnusedOperandEliminationPass:

Public Member Functions
std::string	id () override
void	run () final
	Pass (ir::Graph &graph)
Public Member Functions inherited from onert::compiler::pass::Pass
	Pass (ir::Graph &graph)
virtual	~Pass ()=default
Public Member Functions inherited from onert::compiler::pass::IPass
virtual	~IPass ()=default

Additional Inherited Members
Protected Attributes inherited from onert::compiler::pass::Pass
ir::Graph &	_graph

Detailed Description

A pass to eliminate unused operands from the graph.

Remove operands that are not used by any operations, except Graph inputs/outputs.

Definition at line 36 of file UnusedOperandEliminationPass.h.

Member Function Documentation

id()

std::string onert::compiler::pass::UnusedOperandEliminationPass::id ( )

inlineoverridevirtual

Implements onert::compiler::pass::Pass.

Definition at line 42 of file UnusedOperandEliminationPass.h.

{ return "UnusedOperandEliminationPass"; }

Pass()

onert::compiler::pass::Pass::Pass ( ir::Graph &  graph )

inline

Definition at line 35 of file Pass.h.

: _graph{graph} {}

run()

void onert::compiler::pass::UnusedOperandEliminationPass::run ( )

finalvirtual

Implements onert::compiler::pass::Pass.

Definition at line 32 of file UnusedOperandEliminationPass.cc.

{
  util::Set<ir::OperandIndex> used;
 
  _graph.operations().iterate([&](const ir::OperationIndex &, const ir::IOperation &node) {
    for (auto &&ind : (node.getInputs() + node.getOutputs()) | ir::Remove::UNDEFINED)
    {
      used.add(ind);
    }
  });
 
  // Graph's inputs/outputs are always considered as used
  for (auto &&ind : (_graph.getInputs() + _graph.getOutputs()) | ir::Remove::UNDEFINED)
  {
    used.add(ind);
  }
 
  _graph.operands().iterate([&](const ir::OperandIndex &ind, const ir::Operand &) {
    if (!used.contains(ind))
    {
      VERBOSE() << "Remove unused operand " << ind << std::endl;
      _graph.operands().remove(ind);
    }
  });
}

References onert::compiler::pass::Pass::_graph, onert::util::Set< Element >::add(), onert::util::Set< Element >::contains(), onert::ir::IOperation::getInputs(), onert::ir::Graph::getInputs(), onert::ir::IOperation::getOutputs(), onert::ir::Graph::getOutputs(), onert::util::ObjectManager< Index, Object >::iterate(), onert::ir::Graph::operands(), onert::ir::Graph::operations(), onert::util::ObjectManager< Index, Object >::remove(), onert::ir::UNDEFINED, and VERBOSE.

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The documentation for this class was generated from the following files:

• runtime/onert/core/src/compiler/pass/UnusedOperandEliminationPass.h
• runtime/onert/core/src/compiler/pass/UnusedOperandEliminationPass.cc