def map_common_subexpression(self, expr):
# Here we need to decide whether this CSE should be turned into
# a flux CSE or not. This is a good idea if the transformed
# expression only contains "bare" volume or boundary
# expressions. However, as soon as an operator is applied
# somewhere in the subexpression, the CSE should not be touched
# in order to avoid redundant evaluation of that operator.
#
# Observe that at the time of this writing (Feb 2010), the only
# operators that may occur in boundary expressions are
# quadrature-related.
has_expensive_operators = \
self.expensive_bdry_op_detector(expr.child)
if has_expensive_operators:
return FieldComponent(self.register_boundary_expr(expr),
is_interior=False)
else:
return IdentityMapper.map_common_subexpression(self, expr)
def map_common_subexpression(self, expr):
# Here we need to decide whether this CSE should be turned into
# a flux CSE or not. This is a good idea if the transformed
# expression only contains "bare" volume or boundary
# expressions. However, as soon as an operator is applied
# somewhere in the subexpression, the CSE should not be touched
# in order to avoid redundant evaluation of that operator.
#
# Observe that at the time of this writing (Feb 2010), the only
# operators that may occur in boundary expressions are
# quadrature-related.
has_expensive_operators = \
self.expensive_bdry_op_detector(expr.child)
if has_expensive_operators:
return FieldComponent(
self.register_boundary_expr(expr),
is_interior=False)
else:
return IdentityMapper.map_common_subexpression(self, expr)
