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import itertools
from time import time
import Errors
import DebugFlags
import Options
from Errors import PyrexError, CompileError, InternalError, AbortError, error
#
# 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):
for entry in scope.entries.itervalues():
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)
def inject_utility_code_stage_factory(context):
def inject_utility_code_stage(module_node):
# First, make sure any utility code pulled in by using symbols in the cython
# scope is included
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)
for utilcode in module_node.scope.utility_code_list:
if utilcode in added: continue
added.append(utilcode)
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
#
# 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
from ParseTreeTransforms import CreateClosureClasses, MarkClosureVisitor, DecoratorTransform
from ParseTreeTransforms import InterpretCompilerDirectives, TransformBuiltinMethods
from ParseTreeTransforms import ExpandInplaceOperators, ParallelRangeTransform
from TypeInference import MarkAssignments, MarkOverflowingArithmetic
from ParseTreeTransforms import AdjustDefByDirectives, AlignFunctionDefinitions
from ParseTreeTransforms import RemoveUnreachableCode, GilCheck
from FlowControl import CreateControlFlowGraph
from AnalysedTreeTransforms import AutoTestDictTransform
from AutoDocTransforms import EmbedSignature
from Optimize import FlattenInListTransform, SwitchTransform, IterationTransform
from Optimize import EarlyReplaceBuiltinCalls, OptimizeBuiltinCalls
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?
MarkAssignments(context),
CreateControlFlowGraph(context),
RemoveUnreachableCode(context),
# MarkAssignments(context),
MarkOverflowingArithmetic(context),
IntroduceBufferAuxiliaryVars(context),
_check_c_declarations,
AnalyseExpressionsTransform(context),
CreateClosureClasses(context), ## After all lookups and type inference
ExpandInplaceOperators(context),
OptimizeBuiltinCalls(context), ## Necessary?
IterationTransform(),
SwitchTransform(),
DropRefcountingTransform(),
FinalOptimizePhase(context),
GilCheck(),
]
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
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(context)
]
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):
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
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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