/usr/lib/python2.7/dist-packages/ffc/optimization.py is in python-ffc 2016.2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Copyright (C) 2009-2016 Anders Logg
#
# This file is part of FFC.
#
# FFC is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# FFC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with FFC. If not, see <http://www.gnu.org/licenses/>.
#
# Modified by Martin Sandve Alnæs, 2013
"""
Compiler stage 5: optimization
------------------------------
This module implements the optimization of an intermediate code
representation.
"""
# FFC modules
from ffc.log import info, begin, end
from ffc.representation import pick_representation
def optimize_ir(ir, parameters):
"Optimize intermediate form representation."
begin("Compiler stage 3: Optimizing intermediate representation")
# Check if optimization is requested
if not parameters["optimize"]:
info("Skipping optimizations, add -O to optimize")
end()
return ir
# Extract representations
ir_elements, ir_dofmaps, ir_coordinate_mappings, ir_integrals, ir_forms = ir
# Iterate over integrals
oir_integrals = [_optimize_integral_ir(ir, parameters) for ir in ir_integrals]
end()
return ir_elements, ir_dofmaps, ir_coordinate_mappings, oir_integrals, ir_forms
def _optimize_integral_ir(ir, parameters):
"Compute optimized intermediate represention of integral."
# Select representation
r = pick_representation(ir["representation"])
# Optimize representation (if available for representation)
try:
oir = r.optimize_integral_ir(ir, parameters)
return oir
except:
return ir
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