Source code for psyclone.psyir.transformations.extract_trans
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# Authors: I. Kavcic, Met Office
# A. R. Porter, N. Nobre and S. Siso, STFC Daresbury Lab
# J. Henrichs, Bureau of Meteorology
'''This module contains the base class for extracting extracting a region
of an Invoke into a stand-alone application."
'''
from psyclone.psyGen import BuiltIn, Kern, HaloExchange, GlobalSum
from psyclone.psyir.nodes import (CodeBlock, ExtractNode, Loop, Schedule,
Directive, OMPParallelDirective,
ACCParallelDirective)
from psyclone.psyir.transformations.psy_data_trans import PSyDataTrans
from psyclone.psyir.transformations.transformation_error \
import TransformationError
[docs]
class ExtractTrans(PSyDataTrans):
'''This transformation inserts an ExtractNode or a node derived
from ExtractNode into the PSyIR of a schedule. At code creation
time this node will use the PSyData API to create code that can
write the input and output parameters to a file. The node might
also create a stand-alone driver program that can read the created
file and then execute the instrumented region.
Examples are given in the derived classes LFRicExtractTrans and
GOceanExtractTrans.
After applying the transformation the Nodes marked for extraction are
children of the ExtractNode.
Nodes to extract can be individual constructs within an Invoke (e.g.
Loops containing a Kernel or BuiltIn call) or entire Invokes. This
functionality does not support distributed memory.
:param node_class: The Node class of which an instance will be inserted \
into the tree (defaults to ExtractNode), but can be any derived class.
:type node_class: :py:class:`psyclone.psyir.nodes.ExtractNode` or \
derived class
'''
# The types of node that this transformation cannot enclose
excluded_node_types = (CodeBlock, ExtractNode,
HaloExchange, GlobalSum)
def __init__(self, node_class=ExtractNode):
# This function is required to provide the appropriate default
# node class.
super().__init__(node_class=node_class)
# -------------------------------------------------------------------------
[docs]
def validate(self, node_list, options=None):
# pylint: disable=arguments-renamed
'''Performs validation checks specific to extract-based
transformations.
:param node_list: the list of Node(s) we are checking.
:type node_list: list of :py:class:`psyclone.psyir.nodes.Node`
:param options: a dictionary with options for transformations.
:type options: Optional[Dict[str, Any]]
:raises TransformationError: if transformation is applied to a \
Kernel or a BuiltIn call without its \
parent Loop.
:raises TransformationError: if transformation is applied to a Loop \
without its parent Directive when \
optimisations are applied.
:raises TransformationError: if transformation is applied to an \
orphaned Directive without its parent \
Directive.
'''
# Check ExtractTrans specific constraints.
# Check constraints not covered by excluded_node_types for
# individual Nodes in node_list.
for node in node_list:
# Check that ExtractNode is not inserted between a Kernel or
# a BuiltIn call and its parent Loop.
if isinstance(node, (Kern, BuiltIn)) and \
isinstance(node.parent.parent, Loop):
raise TransformationError(
f"Error in {self.name}: Application to a Kernel or a "
f"Built-in call without its parent Loop is not allowed.")
# Check that ExtractNode is not inserted between a Loop and its
# parent Directive when optimisations are applied, as this may
# result in including the end Directive for extraction but
# not the beginning.
if isinstance(node, Loop) and isinstance(node.parent, Schedule) \
and isinstance(node.parent.parent, Directive):
raise TransformationError(
f"Error in {self.name}: Application to a Loop without its "
f"parent Directive is not allowed.")
# Check that ExtractNode is not inserted within a thread
# parallel region when optimisations are applied. For instance,
# this may be between an orphaned Directive (e.g. OMPDoDirective,
# ACCLoopDirective) and its ancestor Directive (e.g. ACC or OMP
# Parallel Directive) or within an OMPParallelDoDirective.
if node.ancestor((OMPParallelDirective, ACCParallelDirective)):
raise TransformationError(
f"Error in {self.name}: Application to Nodes enclosed "
f"within a thread-parallel region is not allowed.")
# Performs validation checks specific to PSyData-based
# transformations.
super().validate(node_list, options)