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import itertools
from time import time
import Errors
import DebugFlags
import Options
from Visitor import CythonTransform
from Errors import CompileError, InternalError, AbortError
#
# Really small pipeline stages
#
def dumptree(t):
# For quick debugging in pipelines
print t.dump()
return t
def abort_on_errors(node):
# Stop the pipeline if there are any errors.
if Errors.num_errors != 0:
raise AbortError, "pipeline break"
return node
def parse_stage_factory(context):
def parse(compsrc):
source_desc = compsrc.source_desc
full_module_name = compsrc.full_module_name
initial_pos = (source_desc, 1, 0)
saved_cimport_from_pyx, Options.cimport_from_pyx = Options.cimport_from_pyx, False
scope = context.find_module(full_module_name, pos = initial_pos, need_pxd = 0,
check_module_name = not Options.embed)
Options.cimport_from_pyx = saved_cimport_from_pyx
tree = context.parse(source_desc, scope, pxd = 0, full_module_name = full_module_name)
tree.compilation_source = compsrc
tree.scope = scope
tree.is_pxd = False
return tree
return parse
def parse_pxd_stage_factory(context, scope, module_name):
def parse(source_desc):
tree = context.parse(source_desc, scope, pxd=True,
full_module_name=module_name)
tree.scope = scope
tree.is_pxd = True
return tree
return parse
def generate_pyx_code_stage_factory(options, result):
def generate_pyx_code_stage(module_node):
module_node.process_implementation(options, result)
result.compilation_source = module_node.compilation_source
return result
return generate_pyx_code_stage
def inject_pxd_code_stage_factory(context):
def inject_pxd_code_stage(module_node):
from textwrap import dedent
stats = module_node.body.stats
for name, (statlistnode, scope) in context.pxds.iteritems():
module_node.merge_in(statlistnode, scope)
return module_node
return inject_pxd_code_stage
def use_utility_code_definitions(scope, target, seen=None):
if seen is None:
seen = set()
for entry in scope.entries.itervalues():
if entry in seen:
continue
seen.add(entry)
if entry.used and entry.utility_code_definition:
target.use_utility_code(entry.utility_code_definition)
for required_utility in entry.utility_code_definition.requires:
target.use_utility_code(required_utility)
elif entry.as_module:
use_utility_code_definitions(entry.as_module, target, seen)
def inject_utility_code_stage_factory(context):
def inject_utility_code_stage(module_node):
use_utility_code_definitions(context.cython_scope, module_node.scope)
added = []
# Note: the list might be extended inside the loop (if some utility code
# pulls in other utility code, explicitly or implicitly)
for utilcode in module_node.scope.utility_code_list:
if utilcode in added: continue
added.append(utilcode)
if utilcode.requires:
for dep in utilcode.requires:
if not dep in added and not dep in module_node.scope.utility_code_list:
module_node.scope.utility_code_list.append(dep)
tree = utilcode.get_tree()
if tree:
module_node.merge_in(tree.body, tree.scope, merge_scope=True)
return module_node
return inject_utility_code_stage
class UseUtilityCodeDefinitions(CythonTransform):
# Temporary hack to use any utility code in nodes' "utility_code_definitions".
# This should be moved to the code generation phase of the relevant nodes once
# it is safe to generate CythonUtilityCode at code generation time.
def __call__(self, node):
self.scope = node.scope
return super(UseUtilityCodeDefinitions, self).__call__(node)
def process_entry(self, entry):
if entry:
for utility_code in (entry.utility_code, entry.utility_code_definition):
if utility_code:
self.scope.use_utility_code(utility_code)
def visit_AttributeNode(self, node):
self.process_entry(node.entry)
return node
def visit_NameNode(self, node):
self.process_entry(node.entry)
self.process_entry(node.type_entry)
return node
#
# Pipeline factories
#
def create_pipeline(context, mode, exclude_classes=()):
assert mode in ('pyx', 'py', 'pxd')
from Visitor import PrintTree
from ParseTreeTransforms import WithTransform, NormalizeTree, PostParse, PxdPostParse
from ParseTreeTransforms import ForwardDeclareTypes, AnalyseDeclarationsTransform
from ParseTreeTransforms import AnalyseExpressionsTransform, FindInvalidUseOfFusedTypes
from ParseTreeTransforms import CreateClosureClasses, MarkClosureVisitor, DecoratorTransform
from ParseTreeTransforms import InterpretCompilerDirectives, TransformBuiltinMethods
from ParseTreeTransforms import ExpandInplaceOperators, ParallelRangeTransform
from TypeInference import MarkParallelAssignments, MarkOverflowingArithmetic
from ParseTreeTransforms import AdjustDefByDirectives, AlignFunctionDefinitions
from ParseTreeTransforms import RemoveUnreachableCode, GilCheck
from FlowControl import ControlFlowAnalysis
from AnalysedTreeTransforms import AutoTestDictTransform
from AutoDocTransforms import EmbedSignature
from Optimize import FlattenInListTransform, SwitchTransform, IterationTransform
from Optimize import EarlyReplaceBuiltinCalls, OptimizeBuiltinCalls
from Optimize import InlineDefNodeCalls
from Optimize import ConstantFolding, FinalOptimizePhase
from Optimize import DropRefcountingTransform
from Buffer import IntroduceBufferAuxiliaryVars
from ModuleNode import check_c_declarations, check_c_declarations_pxd
if mode == 'pxd':
_check_c_declarations = check_c_declarations_pxd
_specific_post_parse = PxdPostParse(context)
else:
_check_c_declarations = check_c_declarations
_specific_post_parse = None
if mode == 'py':
_align_function_definitions = AlignFunctionDefinitions(context)
else:
_align_function_definitions = None
# NOTE: This is the "common" parts of the pipeline, which is also
# code in pxd files. So it will be run multiple times in a
# compilation stage.
stages = [
NormalizeTree(context),
PostParse(context),
_specific_post_parse,
InterpretCompilerDirectives(context, context.compiler_directives),
ParallelRangeTransform(context),
AdjustDefByDirectives(context),
MarkClosureVisitor(context),
_align_function_definitions,
RemoveUnreachableCode(context),
ConstantFolding(),
FlattenInListTransform(),
WithTransform(context),
DecoratorTransform(context),
ForwardDeclareTypes(context),
AnalyseDeclarationsTransform(context),
AutoTestDictTransform(context),
EmbedSignature(context),
EarlyReplaceBuiltinCalls(context), ## Necessary?
TransformBuiltinMethods(context), ## Necessary?
MarkParallelAssignments(context),
ControlFlowAnalysis(context),
RemoveUnreachableCode(context),
# MarkParallelAssignments(context),
MarkOverflowingArithmetic(context),
IntroduceBufferAuxiliaryVars(context),
_check_c_declarations,
InlineDefNodeCalls(context),
AnalyseExpressionsTransform(context),
FindInvalidUseOfFusedTypes(context),
CreateClosureClasses(context), ## After all lookups and type inference
ExpandInplaceOperators(context),
OptimizeBuiltinCalls(context), ## Necessary?
IterationTransform(),
SwitchTransform(),
DropRefcountingTransform(),
FinalOptimizePhase(context),
GilCheck(),
UseUtilityCodeDefinitions(context),
]
filtered_stages = []
for s in stages:
if s.__class__ not in exclude_classes:
filtered_stages.append(s)
return filtered_stages
def create_pyx_pipeline(context, options, result, py=False, exclude_classes=()):
if py:
mode = 'py'
else:
mode = 'pyx'
test_support = []
if options.evaluate_tree_assertions:
from Cython.TestUtils import TreeAssertVisitor
test_support.append(TreeAssertVisitor())
if options.gdb_debug:
from Cython.Debugger import DebugWriter # requires Py2.5+
from ParseTreeTransforms import DebugTransform
context.gdb_debug_outputwriter = DebugWriter.CythonDebugWriter(
options.output_dir)
debug_transform = [DebugTransform(context, options, result)]
else:
debug_transform = []
return list(itertools.chain(
[parse_stage_factory(context)],
create_pipeline(context, mode, exclude_classes=exclude_classes),
test_support,
[inject_pxd_code_stage_factory(context),
inject_utility_code_stage_factory(context),
abort_on_errors],
debug_transform,
[generate_pyx_code_stage_factory(options, result)]))
def create_pxd_pipeline(context, scope, module_name):
from CodeGeneration import ExtractPxdCode
# The pxd pipeline ends up with a CCodeWriter containing the
# code of the pxd, as well as a pxd scope.
return [
parse_pxd_stage_factory(context, scope, module_name)
] + create_pipeline(context, 'pxd') + [
ExtractPxdCode()
]
def create_py_pipeline(context, options, result):
return create_pyx_pipeline(context, options, result, py=True)
def create_pyx_as_pxd_pipeline(context, result):
from ParseTreeTransforms import AlignFunctionDefinitions, \
MarkClosureVisitor, WithTransform, AnalyseDeclarationsTransform
from Optimize import ConstantFolding, FlattenInListTransform
from Nodes import StatListNode
pipeline = []
pyx_pipeline = create_pyx_pipeline(context, context.options, result,
exclude_classes=[
AlignFunctionDefinitions,
MarkClosureVisitor,
ConstantFolding,
FlattenInListTransform,
WithTransform
])
for stage in pyx_pipeline:
pipeline.append(stage)
if isinstance(stage, AnalyseDeclarationsTransform):
# This is the last stage we need.
break
def fake_pxd(root):
for entry in root.scope.entries.values():
entry.defined_in_pxd = 1
return StatListNode(root.pos, stats=[]), root.scope
pipeline.append(fake_pxd)
return pipeline
def insert_into_pipeline(pipeline, transform, before=None, after=None):
"""
Insert a new transform into the pipeline after or before an instance of
the given class. e.g.
pipeline = insert_into_pipeline(pipeline, transform,
after=AnalyseDeclarationsTransform)
"""
assert before or after
cls = before or after
for i, t in enumerate(pipeline):
if isinstance(t, cls):
break
if after:
i += 1
return pipeline[:i] + [transform] + pipeline[i:]
#
# Running a pipeline
#
def run_pipeline(pipeline, source, printtree=True):
from Cython.Compiler.Visitor import PrintTree
error = None
data = source
try:
try:
for phase in pipeline:
if phase is not None:
if DebugFlags.debug_verbose_pipeline:
t = time()
print "Entering pipeline phase %r" % phase
if not printtree and isinstance(phase, PrintTree):
continue
data = phase(data)
if DebugFlags.debug_verbose_pipeline:
print " %.3f seconds" % (time() - t)
except CompileError, err:
# err is set
Errors.report_error(err)
error = err
except InternalError, err:
# Only raise if there was not an earlier error
if Errors.num_errors == 0:
raise
error = err
except AbortError, err:
error = err
return (error, data)
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