4 cython.declare(UtilityCode=object, EncodedString=object, BytesLiteral=object,
5 Nodes=object, ExprNodes=object, PyrexTypes=object, Builtin=object,
6 UtilNodes=object, Naming=object)
19 from Code import UtilityCode
20 from StringEncoding import EncodedString, BytesLiteral
21 from Errors import error
22 from ParseTreeTransforms import SkipDeclarations
27 from __builtin__ import reduce
29 from functools import reduce
32 from __builtin__ import basestring
34 basestring = str # Python 3
36 class FakePythonEnv(object):
37 "A fake environment for creating type test nodes etc."
40 def unwrap_coerced_node(node, coercion_nodes=(ExprNodes.CoerceToPyTypeNode, ExprNodes.CoerceFromPyTypeNode)):
41 if isinstance(node, coercion_nodes):
45 def unwrap_node(node):
46 while isinstance(node, UtilNodes.ResultRefNode):
47 node = node.expression
50 def is_common_value(a, b):
53 if isinstance(a, ExprNodes.NameNode) and isinstance(b, ExprNodes.NameNode):
54 return a.name == b.name
55 if isinstance(a, ExprNodes.AttributeNode) and isinstance(b, ExprNodes.AttributeNode):
56 return not a.is_py_attr and is_common_value(a.obj, b.obj) and a.attribute == b.attribute
59 class IterationTransform(Visitor.VisitorTransform):
60 """Transform some common for-in loop patterns into efficient C loops:
62 - for-in-dict loop becomes a while loop calling PyDict_Next()
63 - for-in-enumerate is replaced by an external counter variable
64 - for-in-range loop becomes a plain C for loop
66 PyDict_Next_func_type = PyrexTypes.CFuncType(
67 PyrexTypes.c_bint_type, [
68 PyrexTypes.CFuncTypeArg("dict", PyrexTypes.py_object_type, None),
69 PyrexTypes.CFuncTypeArg("pos", PyrexTypes.c_py_ssize_t_ptr_type, None),
70 PyrexTypes.CFuncTypeArg("key", PyrexTypes.CPtrType(PyrexTypes.py_object_type), None),
71 PyrexTypes.CFuncTypeArg("value", PyrexTypes.CPtrType(PyrexTypes.py_object_type), None)
74 PyDict_Next_name = EncodedString("PyDict_Next")
76 PyDict_Next_entry = Symtab.Entry(
77 PyDict_Next_name, PyDict_Next_name, PyDict_Next_func_type)
79 visit_Node = Visitor.VisitorTransform.recurse_to_children
81 def visit_ModuleNode(self, node):
82 self.current_scope = node.scope
83 self.module_scope = node.scope
84 self.visitchildren(node)
87 def visit_DefNode(self, node):
88 oldscope = self.current_scope
89 self.current_scope = node.entry.scope
90 self.visitchildren(node)
91 self.current_scope = oldscope
94 def visit_PrimaryCmpNode(self, node):
95 if node.is_ptr_contains():
105 res_handle = UtilNodes.TempHandle(PyrexTypes.c_bint_type)
106 res = res_handle.ref(pos)
107 result_ref = UtilNodes.ResultRefNode(node)
108 if isinstance(node.operand2, ExprNodes.IndexNode):
109 base_type = node.operand2.base.type.base_type
111 base_type = node.operand2.type.base_type
112 target_handle = UtilNodes.TempHandle(base_type)
113 target = target_handle.ref(pos)
114 cmp_node = ExprNodes.PrimaryCmpNode(
115 pos, operator=u'==', operand1=node.operand1, operand2=target)
116 if_body = Nodes.StatListNode(
118 stats = [Nodes.SingleAssignmentNode(pos, lhs=result_ref, rhs=ExprNodes.BoolNode(pos, value=1)),
119 Nodes.BreakStatNode(pos)])
120 if_node = Nodes.IfStatNode(
122 if_clauses=[Nodes.IfClauseNode(pos, condition=cmp_node, body=if_body)],
124 for_loop = UtilNodes.TempsBlockNode(
126 temps = [target_handle],
127 body = Nodes.ForInStatNode(
130 iterator=ExprNodes.IteratorNode(node.operand2.pos, sequence=node.operand2),
132 else_clause=Nodes.SingleAssignmentNode(pos, lhs=result_ref, rhs=ExprNodes.BoolNode(pos, value=0))))
133 for_loop.analyse_expressions(self.current_scope)
134 for_loop = self(for_loop)
135 new_node = UtilNodes.TempResultFromStatNode(result_ref, for_loop)
137 if node.operator == 'not_in':
138 new_node = ExprNodes.NotNode(pos, operand=new_node)
142 self.visitchildren(node)
145 def visit_ForInStatNode(self, node):
146 self.visitchildren(node)
147 return self._optimise_for_loop(node)
149 def _optimise_for_loop(self, node):
150 iterator = node.iterator.sequence
151 if iterator.type is Builtin.dict_type:
152 # like iterating over dict.keys()
153 return self._transform_dict_iteration(
154 node, dict_obj=iterator, keys=True, values=False)
156 # C array (slice) iteration?
158 plain_iterator = unwrap_coerced_node(iterator)
159 if isinstance(plain_iterator, ExprNodes.SliceIndexNode) and \
160 (plain_iterator.base.type.is_array or plain_iterator.base.type.is_ptr):
161 return self._transform_carray_iteration(node, plain_iterator)
163 if iterator.type.is_ptr or iterator.type.is_array:
164 return self._transform_carray_iteration(node, iterator)
165 if iterator.type in (Builtin.bytes_type, Builtin.unicode_type):
166 return self._transform_string_iteration(node, iterator)
168 # the rest is based on function calls
169 if not isinstance(iterator, ExprNodes.SimpleCallNode):
172 function = iterator.function
174 if isinstance(function, ExprNodes.AttributeNode) and \
175 function.obj.type == Builtin.dict_type:
176 dict_obj = function.obj
177 method = function.attribute
179 is_py3 = self.module_scope.context.language_level >= 3
180 keys = values = False
181 if method == 'iterkeys' or (is_py3 and method == 'keys'):
183 elif method == 'itervalues' or (is_py3 and method == 'values'):
185 elif method == 'iteritems' or (is_py3 and method == 'items'):
189 return self._transform_dict_iteration(
190 node, dict_obj, keys, values)
193 if iterator.self is None and function.is_name and \
194 function.entry and function.entry.is_builtin and \
195 function.name == 'enumerate':
196 return self._transform_enumerate_iteration(node, iterator)
199 if Options.convert_range and node.target.type.is_int:
200 if iterator.self is None and function.is_name and \
201 function.entry and function.entry.is_builtin and \
202 function.name in ('range', 'xrange'):
203 return self._transform_range_iteration(node, iterator)
207 PyUnicode_AS_UNICODE_func_type = PyrexTypes.CFuncType(
208 PyrexTypes.c_py_unicode_ptr_type, [
209 PyrexTypes.CFuncTypeArg("s", Builtin.unicode_type, None)
212 PyUnicode_GET_SIZE_func_type = PyrexTypes.CFuncType(
213 PyrexTypes.c_py_ssize_t_type, [
214 PyrexTypes.CFuncTypeArg("s", Builtin.unicode_type, None)
217 PyBytes_AS_STRING_func_type = PyrexTypes.CFuncType(
218 PyrexTypes.c_char_ptr_type, [
219 PyrexTypes.CFuncTypeArg("s", Builtin.bytes_type, None)
222 PyBytes_GET_SIZE_func_type = PyrexTypes.CFuncType(
223 PyrexTypes.c_py_ssize_t_type, [
224 PyrexTypes.CFuncTypeArg("s", Builtin.bytes_type, None)
227 def _transform_string_iteration(self, node, slice_node):
228 if not node.target.type.is_int:
229 return self._transform_carray_iteration(node, slice_node)
230 if slice_node.type is Builtin.unicode_type:
231 unpack_func = "PyUnicode_AS_UNICODE"
232 len_func = "PyUnicode_GET_SIZE"
233 unpack_func_type = self.PyUnicode_AS_UNICODE_func_type
234 len_func_type = self.PyUnicode_GET_SIZE_func_type
235 elif slice_node.type is Builtin.bytes_type:
236 unpack_func = "PyBytes_AS_STRING"
237 unpack_func_type = self.PyBytes_AS_STRING_func_type
238 len_func = "PyBytes_GET_SIZE"
239 len_func_type = self.PyBytes_GET_SIZE_func_type
243 unpack_temp_node = UtilNodes.LetRefNode(
244 slice_node.as_none_safe_node("'NoneType' is not iterable"))
246 slice_base_node = ExprNodes.PythonCapiCallNode(
247 slice_node.pos, unpack_func, unpack_func_type,
248 args = [unpack_temp_node],
251 len_node = ExprNodes.PythonCapiCallNode(
252 slice_node.pos, len_func, len_func_type,
253 args = [unpack_temp_node],
257 return UtilNodes.LetNode(
259 self._transform_carray_iteration(
261 ExprNodes.SliceIndexNode(
263 base = slice_base_node,
267 type = slice_base_node.type,
271 def _transform_carray_iteration(self, node, slice_node):
273 if isinstance(slice_node, ExprNodes.SliceIndexNode):
274 slice_base = slice_node.base
275 start = slice_node.start
276 stop = slice_node.stop
279 if not slice_base.type.is_pyobject:
280 error(slice_node.pos, "C array iteration requires known end index")
282 elif isinstance(slice_node, ExprNodes.IndexNode):
283 # slice_node.index must be a SliceNode
284 slice_base = slice_node.base
285 index = slice_node.index
290 if step.constant_result is None:
292 elif not isinstance(step.constant_result, (int,long)) \
293 or step.constant_result == 0 \
294 or step.constant_result > 0 and not stop \
295 or step.constant_result < 0 and not start:
296 if not slice_base.type.is_pyobject:
297 error(step.pos, "C array iteration requires known step size and end index")
300 # step sign is handled internally by ForFromStatNode
301 neg_step = step.constant_result < 0
302 step = ExprNodes.IntNode(step.pos, type=PyrexTypes.c_py_ssize_t_type,
303 value=abs(step.constant_result),
304 constant_result=abs(step.constant_result))
305 elif slice_node.type.is_array:
306 if slice_node.type.size is None:
307 error(step.pos, "C array iteration requires known end index")
309 slice_base = slice_node
311 stop = ExprNodes.IntNode(
312 slice_node.pos, value=str(slice_node.type.size),
313 type=PyrexTypes.c_py_ssize_t_type, constant_result=slice_node.type.size)
317 if not slice_node.type.is_pyobject:
318 error(slice_node.pos, "C array iteration requires known end index")
322 if start.constant_result is None:
325 start = start.coerce_to(PyrexTypes.c_py_ssize_t_type, self.current_scope)
327 if stop.constant_result is None:
330 stop = stop.coerce_to(PyrexTypes.c_py_ssize_t_type, self.current_scope)
333 stop = ExprNodes.IntNode(
334 slice_node.pos, value='-1', type=PyrexTypes.c_py_ssize_t_type, constant_result=-1)
336 error(slice_node.pos, "C array iteration requires known step size and end index")
339 ptr_type = slice_base.type
340 if ptr_type.is_array:
341 ptr_type = ptr_type.element_ptr_type()
342 carray_ptr = slice_base.coerce_to_simple(self.current_scope)
344 if start and start.constant_result != 0:
345 start_ptr_node = ExprNodes.AddNode(
352 start_ptr_node = carray_ptr
354 stop_ptr_node = ExprNodes.AddNode(
356 operand1=ExprNodes.CloneNode(carray_ptr),
360 ).coerce_to_simple(self.current_scope)
362 counter = UtilNodes.TempHandle(ptr_type)
363 counter_temp = counter.ref(node.target.pos)
365 if slice_base.type.is_string and node.target.type.is_pyobject:
366 # special case: char* -> bytes
367 target_value = ExprNodes.SliceIndexNode(
369 start=ExprNodes.IntNode(node.target.pos, value='0',
371 type=PyrexTypes.c_int_type),
372 stop=ExprNodes.IntNode(node.target.pos, value='1',
374 type=PyrexTypes.c_int_type),
376 type=Builtin.bytes_type,
379 target_value = ExprNodes.IndexNode(
381 index=ExprNodes.IntNode(node.target.pos, value='0',
383 type=PyrexTypes.c_int_type),
385 is_buffer_access=False,
386 type=ptr_type.base_type)
388 if target_value.type != node.target.type:
389 target_value = target_value.coerce_to(node.target.type,
392 target_assign = Nodes.SingleAssignmentNode(
393 pos = node.target.pos,
397 body = Nodes.StatListNode(
399 stats = [target_assign, node.body])
401 for_node = Nodes.ForFromStatNode(
403 bound1=start_ptr_node, relation1=neg_step and '>=' or '<=',
405 relation2=neg_step and '>' or '<', bound2=stop_ptr_node,
406 step=step, body=body,
407 else_clause=node.else_clause,
410 return UtilNodes.TempsBlockNode(
411 node.pos, temps=[counter],
414 def _transform_enumerate_iteration(self, node, enumerate_function):
415 args = enumerate_function.arg_tuple.args
417 error(enumerate_function.pos,
418 "enumerate() requires an iterable argument")
421 error(enumerate_function.pos,
422 "enumerate() takes at most 1 argument")
425 if not node.target.is_sequence_constructor:
426 # leave this untouched for now
428 targets = node.target.args
429 if len(targets) != 2:
430 # leave this untouched for now
432 if not isinstance(targets[0], ExprNodes.NameNode):
433 # leave this untouched for now
436 enumerate_target, iterable_target = targets
437 counter_type = enumerate_target.type
439 if not counter_type.is_pyobject and not counter_type.is_int:
440 # nothing we can do here, I guess
443 temp = UtilNodes.LetRefNode(ExprNodes.IntNode(enumerate_function.pos,
447 inc_expression = ExprNodes.AddNode(
448 enumerate_function.pos,
450 operand2 = ExprNodes.IntNode(node.pos, value='1',
455 is_temp = counter_type.is_pyobject
459 Nodes.SingleAssignmentNode(
460 pos = enumerate_target.pos,
461 lhs = enumerate_target,
463 Nodes.SingleAssignmentNode(
464 pos = enumerate_target.pos,
466 rhs = inc_expression)
469 if isinstance(node.body, Nodes.StatListNode):
470 node.body.stats = loop_body + node.body.stats
472 loop_body.append(node.body)
473 node.body = Nodes.StatListNode(
477 node.target = iterable_target
478 node.item = node.item.coerce_to(iterable_target.type, self.current_scope)
479 node.iterator.sequence = enumerate_function.arg_tuple.args[0]
481 # recurse into loop to check for further optimisations
482 return UtilNodes.LetNode(temp, self._optimise_for_loop(node))
484 def _transform_range_iteration(self, node, range_function):
485 args = range_function.arg_tuple.args
487 step_pos = range_function.pos
489 step = ExprNodes.IntNode(step_pos, value='1',
494 if not isinstance(step.constant_result, (int, long)):
495 # cannot determine step direction
497 step_value = step.constant_result
499 # will lead to an error elsewhere
501 if not isinstance(step, ExprNodes.IntNode):
502 step = ExprNodes.IntNode(step_pos, value=str(step_value),
503 constant_result=step_value)
506 step.value = str(-step_value)
514 bound1 = ExprNodes.IntNode(range_function.pos, value='0',
516 bound2 = args[0].coerce_to_integer(self.current_scope)
518 bound1 = args[0].coerce_to_integer(self.current_scope)
519 bound2 = args[1].coerce_to_integer(self.current_scope)
520 step = step.coerce_to_integer(self.current_scope)
522 if not bound2.is_literal:
523 # stop bound must be immutable => keep it in a temp var
524 bound2_is_temp = True
525 bound2 = UtilNodes.LetRefNode(bound2)
527 bound2_is_temp = False
529 for_node = Nodes.ForFromStatNode(
532 bound1=bound1, relation1=relation1,
533 relation2=relation2, bound2=bound2,
534 step=step, body=node.body,
535 else_clause=node.else_clause,
539 for_node = UtilNodes.LetNode(bound2, for_node)
543 def _transform_dict_iteration(self, node, dict_obj, keys, values):
544 py_object_ptr = PyrexTypes.c_void_ptr_type
547 temp = UtilNodes.TempHandle(PyrexTypes.py_object_type)
549 dict_temp = temp.ref(dict_obj.pos)
550 temp = UtilNodes.TempHandle(PyrexTypes.c_py_ssize_t_type)
552 pos_temp = temp.ref(node.pos)
553 pos_temp_addr = ExprNodes.AmpersandNode(
554 node.pos, operand=pos_temp,
555 type=PyrexTypes.c_ptr_type(PyrexTypes.c_py_ssize_t_type))
557 temp = UtilNodes.TempHandle(py_object_ptr)
559 key_temp = temp.ref(node.target.pos)
560 key_temp_addr = ExprNodes.AmpersandNode(
561 node.target.pos, operand=key_temp,
562 type=PyrexTypes.c_ptr_type(py_object_ptr))
564 key_temp_addr = key_temp = ExprNodes.NullNode(
567 temp = UtilNodes.TempHandle(py_object_ptr)
569 value_temp = temp.ref(node.target.pos)
570 value_temp_addr = ExprNodes.AmpersandNode(
571 node.target.pos, operand=value_temp,
572 type=PyrexTypes.c_ptr_type(py_object_ptr))
574 value_temp_addr = value_temp = ExprNodes.NullNode(
577 key_target = value_target = node.target
580 if node.target.is_sequence_constructor:
581 if len(node.target.args) == 2:
582 key_target, value_target = node.target.args
584 # unusual case that may or may not lead to an error
587 tuple_target = node.target
589 def coerce_object_to(obj_node, dest_type):
590 if dest_type.is_pyobject:
591 if dest_type != obj_node.type:
592 if dest_type.is_extension_type or dest_type.is_builtin_type:
593 obj_node = ExprNodes.PyTypeTestNode(
594 obj_node, dest_type, self.current_scope, notnone=True)
595 result = ExprNodes.TypecastNode(
599 return (result, None)
601 temp = UtilNodes.TempHandle(dest_type)
603 temp_result = temp.ref(obj_node.pos)
604 class CoercedTempNode(ExprNodes.CoerceFromPyTypeNode):
606 return temp_result.result()
607 def generate_execution_code(self, code):
608 self.generate_result_code(code)
609 return (temp_result, CoercedTempNode(dest_type, obj_node, self.current_scope))
611 if isinstance(node.body, Nodes.StatListNode):
614 body = Nodes.StatListNode(pos = node.body.pos,
618 tuple_result = ExprNodes.TupleNode(
619 pos = tuple_target.pos,
620 args = [key_temp, value_temp],
622 type = Builtin.tuple_type,
625 0, Nodes.SingleAssignmentNode(
626 pos = tuple_target.pos,
630 # execute all coercions before the assignments
634 temp_result, coercion = coerce_object_to(
635 key_temp, key_target.type)
637 coercion_stats.append(coercion)
639 Nodes.SingleAssignmentNode(
644 temp_result, coercion = coerce_object_to(
645 value_temp, value_target.type)
647 coercion_stats.append(coercion)
649 Nodes.SingleAssignmentNode(
650 pos = value_temp.pos,
653 body.stats[0:0] = coercion_stats + assign_stats
656 Nodes.SingleAssignmentNode(
660 Nodes.SingleAssignmentNode(
663 rhs = ExprNodes.IntNode(node.pos, value='0',
667 condition = ExprNodes.SimpleCallNode(
669 type = PyrexTypes.c_bint_type,
670 function = ExprNodes.NameNode(
672 name = self.PyDict_Next_name,
673 type = self.PyDict_Next_func_type,
674 entry = self.PyDict_Next_entry),
675 args = [dict_temp, pos_temp_addr,
676 key_temp_addr, value_temp_addr]
679 else_clause = node.else_clause
683 return UtilNodes.TempsBlockNode(
684 node.pos, temps=temps,
685 body=Nodes.StatListNode(
691 class SwitchTransform(Visitor.VisitorTransform):
693 This transformation tries to turn long if statements into C switch statements.
694 The requirement is that every clause be an (or of) var == value, where the var
695 is common among all clauses and both var and value are ints.
697 NO_MATCH = (None, None, None)
699 def extract_conditions(self, cond, allow_not_in):
701 if isinstance(cond, ExprNodes.CoerceToTempNode):
703 elif isinstance(cond, UtilNodes.EvalWithTempExprNode):
704 # this is what we get from the FlattenInListTransform
705 cond = cond.subexpression
706 elif isinstance(cond, ExprNodes.TypecastNode):
711 if isinstance(cond, ExprNodes.PrimaryCmpNode):
712 if cond.cascade is not None:
714 elif cond.is_c_string_contains() and \
715 isinstance(cond.operand2, (ExprNodes.UnicodeNode, ExprNodes.BytesNode)):
716 not_in = cond.operator == 'not_in'
717 if not_in and not allow_not_in:
719 if isinstance(cond.operand2, ExprNodes.UnicodeNode) and \
720 cond.operand2.contains_surrogates():
721 # dealing with surrogates leads to different
722 # behaviour on wide and narrow Unicode
723 # platforms => refuse to optimise this case
725 return not_in, cond.operand1, self.extract_in_string_conditions(cond.operand2)
726 elif not cond.is_python_comparison():
727 if cond.operator == '==':
729 elif allow_not_in and cond.operator == '!=':
733 # this looks somewhat silly, but it does the right
734 # checks for NameNode and AttributeNode
735 if is_common_value(cond.operand1, cond.operand1):
736 if cond.operand2.is_literal:
737 return not_in, cond.operand1, [cond.operand2]
738 elif getattr(cond.operand2, 'entry', None) \
739 and cond.operand2.entry.is_const:
740 return not_in, cond.operand1, [cond.operand2]
741 if is_common_value(cond.operand2, cond.operand2):
742 if cond.operand1.is_literal:
743 return not_in, cond.operand2, [cond.operand1]
744 elif getattr(cond.operand1, 'entry', None) \
745 and cond.operand1.entry.is_const:
746 return not_in, cond.operand2, [cond.operand1]
747 elif isinstance(cond, ExprNodes.BoolBinopNode):
748 if cond.operator == 'or' or (allow_not_in and cond.operator == 'and'):
749 allow_not_in = (cond.operator == 'and')
750 not_in_1, t1, c1 = self.extract_conditions(cond.operand1, allow_not_in)
751 not_in_2, t2, c2 = self.extract_conditions(cond.operand2, allow_not_in)
752 if t1 is not None and not_in_1 == not_in_2 and is_common_value(t1, t2):
753 if (not not_in_1) or allow_not_in:
754 return not_in_1, t1, c1+c2
757 def extract_in_string_conditions(self, string_literal):
758 if isinstance(string_literal, ExprNodes.UnicodeNode):
759 charvals = list(map(ord, set(string_literal.value)))
761 return [ ExprNodes.IntNode(string_literal.pos, value=str(charval),
762 constant_result=charval)
763 for charval in charvals ]
765 # this is a bit tricky as Py3's bytes type returns
766 # integers on iteration, whereas Py2 returns 1-char byte
768 characters = string_literal.value
769 characters = list(set([ characters[i:i+1] for i in range(len(characters)) ]))
771 return [ ExprNodes.CharNode(string_literal.pos, value=charval,
772 constant_result=charval)
773 for charval in characters ]
775 def extract_common_conditions(self, common_var, condition, allow_not_in):
776 not_in, var, conditions = self.extract_conditions(condition, allow_not_in)
779 elif common_var is not None and not is_common_value(var, common_var):
781 elif not var.type.is_int or sum([not cond.type.is_int for cond in conditions]):
783 return not_in, var, conditions
785 def has_duplicate_values(self, condition_values):
786 # duplicated values don't work in a switch statement
788 for value in condition_values:
789 if value.constant_result is not ExprNodes.not_a_constant:
790 if value.constant_result in seen:
792 seen.add(value.constant_result)
794 # this isn't completely safe as we don't know the
795 # final C value, but this is about the best we can do
796 seen.add(getattr(getattr(value, 'entry', None), 'cname'))
799 def visit_IfStatNode(self, node):
802 for if_clause in node.if_clauses:
803 _, common_var, conditions = self.extract_common_conditions(
804 common_var, if_clause.condition, False)
805 if common_var is None:
806 self.visitchildren(node)
808 cases.append(Nodes.SwitchCaseNode(pos = if_clause.pos,
809 conditions = conditions,
810 body = if_clause.body))
812 if sum([ len(case.conditions) for case in cases ]) < 2:
813 self.visitchildren(node)
815 if self.has_duplicate_values(sum([case.conditions for case in cases], [])):
816 self.visitchildren(node)
819 common_var = unwrap_node(common_var)
820 switch_node = Nodes.SwitchStatNode(pos = node.pos,
823 else_clause = node.else_clause)
826 def visit_CondExprNode(self, node):
827 not_in, common_var, conditions = self.extract_common_conditions(
828 None, node.test, True)
829 if common_var is None \
830 or len(conditions) < 2 \
831 or self.has_duplicate_values(conditions):
832 self.visitchildren(node)
834 return self.build_simple_switch_statement(
835 node, common_var, conditions, not_in,
836 node.true_val, node.false_val)
838 def visit_BoolBinopNode(self, node):
839 not_in, common_var, conditions = self.extract_common_conditions(
841 if common_var is None \
842 or len(conditions) < 2 \
843 or self.has_duplicate_values(conditions):
844 self.visitchildren(node)
847 return self.build_simple_switch_statement(
848 node, common_var, conditions, not_in,
849 ExprNodes.BoolNode(node.pos, value=True, constant_result=True),
850 ExprNodes.BoolNode(node.pos, value=False, constant_result=False))
852 def visit_PrimaryCmpNode(self, node):
853 not_in, common_var, conditions = self.extract_common_conditions(
855 if common_var is None \
856 or len(conditions) < 2 \
857 or self.has_duplicate_values(conditions):
858 self.visitchildren(node)
861 return self.build_simple_switch_statement(
862 node, common_var, conditions, not_in,
863 ExprNodes.BoolNode(node.pos, value=True, constant_result=True),
864 ExprNodes.BoolNode(node.pos, value=False, constant_result=False))
866 def build_simple_switch_statement(self, node, common_var, conditions,
867 not_in, true_val, false_val):
868 result_ref = UtilNodes.ResultRefNode(node)
869 true_body = Nodes.SingleAssignmentNode(
874 false_body = Nodes.SingleAssignmentNode(
881 true_body, false_body = false_body, true_body
883 cases = [Nodes.SwitchCaseNode(pos = node.pos,
884 conditions = conditions,
887 common_var = unwrap_node(common_var)
888 switch_node = Nodes.SwitchStatNode(pos = node.pos,
891 else_clause = false_body)
892 return UtilNodes.TempResultFromStatNode(result_ref, switch_node)
894 visit_Node = Visitor.VisitorTransform.recurse_to_children
897 class FlattenInListTransform(Visitor.VisitorTransform, SkipDeclarations):
899 This transformation flattens "x in [val1, ..., valn]" into a sequential list
903 def visit_PrimaryCmpNode(self, node):
904 self.visitchildren(node)
905 if node.cascade is not None:
907 elif node.operator == 'in':
910 elif node.operator == 'not_in':
916 if not isinstance(node.operand2, (ExprNodes.TupleNode,
921 args = node.operand2.args
923 return ExprNodes.BoolNode(pos = node.pos, value = node.operator == 'not_in')
925 lhs = UtilNodes.ResultRefNode(node.operand1)
930 if not arg.is_simple():
931 # must evaluate all non-simple RHS before doing the comparisons
932 arg = UtilNodes.LetRefNode(arg)
934 cond = ExprNodes.PrimaryCmpNode(
937 operator = eq_or_neq,
940 conds.append(ExprNodes.TypecastNode(
943 type = PyrexTypes.c_bint_type))
944 def concat(left, right):
945 return ExprNodes.BoolBinopNode(
947 operator = conjunction,
951 condition = reduce(concat, conds)
952 new_node = UtilNodes.EvalWithTempExprNode(lhs, condition)
953 for temp in temps[::-1]:
954 new_node = UtilNodes.EvalWithTempExprNode(temp, new_node)
957 visit_Node = Visitor.VisitorTransform.recurse_to_children
960 class DropRefcountingTransform(Visitor.VisitorTransform):
961 """Drop ref-counting in safe places.
963 visit_Node = Visitor.VisitorTransform.recurse_to_children
965 def visit_ParallelAssignmentNode(self, node):
967 Parallel swap assignments like 'a,b = b,a' are safe.
969 left_names, right_names = [], []
970 left_indices, right_indices = [], []
973 for stat in node.stats:
974 if isinstance(stat, Nodes.SingleAssignmentNode):
975 if not self._extract_operand(stat.lhs, left_names,
976 left_indices, temps):
978 if not self._extract_operand(stat.rhs, right_names,
979 right_indices, temps):
981 elif isinstance(stat, Nodes.CascadedAssignmentNode):
987 if left_names or right_names:
988 # lhs/rhs names must be a non-redundant permutation
989 lnames = [ path for path, n in left_names ]
990 rnames = [ path for path, n in right_names ]
991 if set(lnames) != set(rnames):
993 if len(set(lnames)) != len(right_names):
996 if left_indices or right_indices:
997 # base name and index of index nodes must be a
998 # non-redundant permutation
1000 for lhs_node in left_indices:
1001 index_id = self._extract_index_id(lhs_node)
1004 lindices.append(index_id)
1006 for rhs_node in right_indices:
1007 index_id = self._extract_index_id(rhs_node)
1010 rindices.append(index_id)
1012 if set(lindices) != set(rindices):
1014 if len(set(lindices)) != len(right_indices):
1017 # really supporting IndexNode requires support in
1018 # __Pyx_GetItemInt(), so let's stop short for now
1021 temp_args = [t.arg for t in temps]
1023 temp.use_managed_ref = False
1025 for _, name_node in left_names + right_names:
1026 if name_node not in temp_args:
1027 name_node.use_managed_ref = False
1029 for index_node in left_indices + right_indices:
1030 index_node.use_managed_ref = False
1034 def _extract_operand(self, node, names, indices, temps):
1035 node = unwrap_node(node)
1036 if not node.type.is_pyobject:
1038 if isinstance(node, ExprNodes.CoerceToTempNode):
1043 while isinstance(obj_node, ExprNodes.AttributeNode):
1044 if obj_node.is_py_attr:
1046 name_path.append(obj_node.member)
1047 obj_node = obj_node.obj
1048 if isinstance(obj_node, ExprNodes.NameNode):
1049 name_path.append(obj_node.name)
1050 names.append( ('.'.join(name_path[::-1]), node) )
1051 elif isinstance(node, ExprNodes.IndexNode):
1052 if node.base.type != Builtin.list_type:
1054 if not node.index.type.is_int:
1056 if not isinstance(node.base, ExprNodes.NameNode):
1058 indices.append(node)
1063 def _extract_index_id(self, index_node):
1064 base = index_node.base
1065 index = index_node.index
1066 if isinstance(index, ExprNodes.NameNode):
1067 index_val = index.name
1068 elif isinstance(index, ExprNodes.ConstNode):
1073 return (base.name, index_val)
1076 class EarlyReplaceBuiltinCalls(Visitor.EnvTransform):
1077 """Optimize some common calls to builtin types *before* the type
1078 analysis phase and *after* the declarations analysis phase.
1080 This transform cannot make use of any argument types, but it can
1081 restructure the tree in a way that the type analysis phase can
1084 Introducing C function calls here may not be a good idea. Move
1085 them to the OptimizeBuiltinCalls transform instead, which runs
1088 # only intercept on call nodes
1089 visit_Node = Visitor.VisitorTransform.recurse_to_children
1091 def visit_SimpleCallNode(self, node):
1092 self.visitchildren(node)
1093 function = node.function
1094 if not self._function_is_builtin_name(function):
1096 return self._dispatch_to_handler(node, function, node.args)
1098 def visit_GeneralCallNode(self, node):
1099 self.visitchildren(node)
1100 function = node.function
1101 if not self._function_is_builtin_name(function):
1103 arg_tuple = node.positional_args
1104 if not isinstance(arg_tuple, ExprNodes.TupleNode):
1106 args = arg_tuple.args
1107 return self._dispatch_to_handler(
1108 node, function, args, node.keyword_args)
1110 def _function_is_builtin_name(self, function):
1111 if not function.is_name:
1113 env = self.current_env()
1114 entry = env.lookup(function.name)
1115 if entry is not env.builtin_scope().lookup_here(function.name):
1117 # if entry is None, it's at least an undeclared name, so likely builtin
1120 def _dispatch_to_handler(self, node, function, args, kwargs=None):
1122 handler_name = '_handle_simple_function_%s' % function.name
1124 handler_name = '_handle_general_function_%s' % function.name
1125 handle_call = getattr(self, handler_name, None)
1126 if handle_call is not None:
1128 return handle_call(node, args)
1130 return handle_call(node, args, kwargs)
1133 def _inject_capi_function(self, node, cname, func_type, utility_code=None):
1134 node.function = ExprNodes.PythonCapiFunctionNode(
1135 node.function.pos, node.function.name, cname, func_type,
1136 utility_code = utility_code)
1138 def _error_wrong_arg_count(self, function_name, node, args, expected=None):
1139 if not expected: # None or 0
1141 elif isinstance(expected, basestring) or expected > 1:
1147 if expected is not None:
1148 expected_str = 'expected %s, ' % expected
1151 error(node.pos, "%s(%s) called with wrong number of args, %sfound %d" % (
1152 function_name, arg_str, expected_str, len(args)))
1154 # specific handlers for simple call nodes
1156 def _handle_simple_function_float(self, node, pos_args):
1157 if len(pos_args) == 0:
1158 return ExprNodes.FloatNode(node.pos, value='0.0')
1159 if len(pos_args) > 1:
1160 self._error_wrong_arg_count('float', node, pos_args, 1)
1163 class YieldNodeCollector(Visitor.TreeVisitor):
1165 Visitor.TreeVisitor.__init__(self)
1166 self.yield_stat_nodes = {}
1167 self.yield_nodes = []
1169 visit_Node = Visitor.TreeVisitor.visitchildren
1170 def visit_YieldExprNode(self, node):
1171 self.yield_nodes.append(node)
1172 self.visitchildren(node)
1174 def visit_ExprStatNode(self, node):
1175 self.visitchildren(node)
1176 if node.expr in self.yield_nodes:
1177 self.yield_stat_nodes[node.expr] = node
1179 def __visit_GeneratorExpressionNode(self, node):
1180 # enable when we support generic generator expressions
1182 # everything below this node is out of scope
1185 def _find_single_yield_expression(self, node):
1186 collector = self.YieldNodeCollector()
1187 collector.visitchildren(node)
1188 if len(collector.yield_nodes) != 1:
1190 yield_node = collector.yield_nodes[0]
1192 return (yield_node.arg, collector.yield_stat_nodes[yield_node])
1196 def _handle_simple_function_all(self, node, pos_args):
1199 _result = all(x for L in LL for x in L)
1214 return self._transform_any_all(node, pos_args, False)
1216 def _handle_simple_function_any(self, node, pos_args):
1219 _result = any(x for L in LL for x in L)
1234 return self._transform_any_all(node, pos_args, True)
1236 def _transform_any_all(self, node, pos_args, is_any):
1237 if len(pos_args) != 1:
1239 if not isinstance(pos_args[0], ExprNodes.GeneratorExpressionNode):
1241 gen_expr_node = pos_args[0]
1242 loop_node = gen_expr_node.loop
1243 yield_expression, yield_stat_node = self._find_single_yield_expression(loop_node)
1244 if yield_expression is None:
1248 condition = yield_expression
1250 condition = ExprNodes.NotNode(yield_expression.pos, operand = yield_expression)
1252 result_ref = UtilNodes.ResultRefNode(pos=node.pos, type=PyrexTypes.c_bint_type)
1253 test_node = Nodes.IfStatNode(
1254 yield_expression.pos,
1256 if_clauses = [ Nodes.IfClauseNode(
1257 yield_expression.pos,
1258 condition = condition,
1259 body = Nodes.StatListNode(
1262 Nodes.SingleAssignmentNode(
1265 rhs = ExprNodes.BoolNode(yield_expression.pos, value = is_any,
1266 constant_result = is_any)),
1267 Nodes.BreakStatNode(node.pos)
1271 while isinstance(loop.body, Nodes.LoopNode):
1272 next_loop = loop.body
1273 loop.body = Nodes.StatListNode(loop.body.pos, stats = [
1275 Nodes.BreakStatNode(yield_expression.pos)
1277 next_loop.else_clause = Nodes.ContinueStatNode(yield_expression.pos)
1279 loop_node.else_clause = Nodes.SingleAssignmentNode(
1282 rhs = ExprNodes.BoolNode(yield_expression.pos, value = not is_any,
1283 constant_result = not is_any))
1285 Visitor.recursively_replace_node(loop_node, yield_stat_node, test_node)
1287 return ExprNodes.InlinedGeneratorExpressionNode(
1288 gen_expr_node.pos, loop = loop_node, result_node = result_ref,
1289 expr_scope = gen_expr_node.expr_scope, orig_func = is_any and 'any' or 'all')
1291 def _handle_simple_function_sorted(self, node, pos_args):
1292 """Transform sorted(genexpr) into [listcomp].sort(). CPython
1293 just reads the iterable into a list and calls .sort() on it.
1294 Expanding the iterable in a listcomp is still faster.
1296 if len(pos_args) != 1:
1298 if not isinstance(pos_args[0], ExprNodes.GeneratorExpressionNode):
1300 gen_expr_node = pos_args[0]
1301 loop_node = gen_expr_node.loop
1302 yield_expression, yield_stat_node = self._find_single_yield_expression(loop_node)
1303 if yield_expression is None:
1306 result_node = UtilNodes.ResultRefNode(
1307 pos = loop_node.pos, type = Builtin.list_type, may_hold_none=False)
1309 target = ExprNodes.ListNode(node.pos, args = [])
1310 append_node = ExprNodes.ComprehensionAppendNode(
1311 yield_expression.pos, expr = yield_expression,
1312 target = ExprNodes.CloneNode(target))
1314 Visitor.recursively_replace_node(loop_node, yield_stat_node, append_node)
1316 listcomp_node = ExprNodes.ComprehensionNode(
1317 gen_expr_node.pos, loop = loop_node, target = target,
1318 append = append_node, type = Builtin.list_type,
1319 expr_scope = gen_expr_node.expr_scope,
1320 has_local_scope = True)
1321 listcomp_assign_node = Nodes.SingleAssignmentNode(
1322 node.pos, lhs = result_node, rhs = listcomp_node, first = True)
1324 sort_method = ExprNodes.AttributeNode(
1325 node.pos, obj = result_node, attribute = EncodedString('sort'),
1327 needs_none_check = False)
1328 sort_node = Nodes.ExprStatNode(
1329 node.pos, expr = ExprNodes.SimpleCallNode(
1330 node.pos, function = sort_method, args = []))
1332 sort_node.analyse_declarations(self.current_env())
1334 return UtilNodes.TempResultFromStatNode(
1336 Nodes.StatListNode(node.pos, stats = [ listcomp_assign_node, sort_node ]))
1338 def _handle_simple_function_sum(self, node, pos_args):
1339 """Transform sum(genexpr) into an equivalent inlined aggregation loop.
1341 if len(pos_args) not in (1,2):
1343 if not isinstance(pos_args[0], (ExprNodes.GeneratorExpressionNode,
1344 ExprNodes.ComprehensionNode)):
1346 gen_expr_node = pos_args[0]
1347 loop_node = gen_expr_node.loop
1349 if isinstance(gen_expr_node, ExprNodes.GeneratorExpressionNode):
1350 yield_expression, yield_stat_node = self._find_single_yield_expression(loop_node)
1351 if yield_expression is None:
1353 else: # ComprehensionNode
1354 yield_stat_node = gen_expr_node.append
1355 yield_expression = yield_stat_node.expr
1357 if not yield_expression.is_literal or not yield_expression.type.is_int:
1359 except AttributeError:
1360 return node # in case we don't have a type yet
1361 # special case: old Py2 backwards compatible "sum([int_const for ...])"
1362 # can safely be unpacked into a genexpr
1364 if len(pos_args) == 1:
1365 start = ExprNodes.IntNode(node.pos, value='0', constant_result=0)
1369 result_ref = UtilNodes.ResultRefNode(pos=node.pos, type=PyrexTypes.py_object_type)
1370 add_node = Nodes.SingleAssignmentNode(
1371 yield_expression.pos,
1373 rhs = ExprNodes.binop_node(node.pos, '+', result_ref, yield_expression)
1376 Visitor.recursively_replace_node(loop_node, yield_stat_node, add_node)
1378 exec_code = Nodes.StatListNode(
1381 Nodes.SingleAssignmentNode(
1383 lhs = UtilNodes.ResultRefNode(pos=node.pos, expression=result_ref),
1389 return ExprNodes.InlinedGeneratorExpressionNode(
1390 gen_expr_node.pos, loop = exec_code, result_node = result_ref,
1391 expr_scope = gen_expr_node.expr_scope, orig_func = 'sum',
1392 has_local_scope = gen_expr_node.has_local_scope)
1394 def _handle_simple_function_min(self, node, pos_args):
1395 return self._optimise_min_max(node, pos_args, '<')
1397 def _handle_simple_function_max(self, node, pos_args):
1398 return self._optimise_min_max(node, pos_args, '>')
1400 def _optimise_min_max(self, node, args, operator):
1401 """Replace min(a,b,...) and max(a,b,...) by explicit comparison code.
1404 # leave this to Python
1407 cascaded_nodes = list(map(UtilNodes.ResultRefNode, args[1:]))
1409 last_result = args[0]
1410 for arg_node in cascaded_nodes:
1411 result_ref = UtilNodes.ResultRefNode(last_result)
1412 last_result = ExprNodes.CondExprNode(
1414 true_val = arg_node,
1415 false_val = result_ref,
1416 test = ExprNodes.PrimaryCmpNode(
1418 operand1 = arg_node,
1419 operator = operator,
1420 operand2 = result_ref,
1423 last_result = UtilNodes.EvalWithTempExprNode(result_ref, last_result)
1425 for ref_node in cascaded_nodes[::-1]:
1426 last_result = UtilNodes.EvalWithTempExprNode(ref_node, last_result)
1430 def _DISABLED_handle_simple_function_tuple(self, node, pos_args):
1431 if len(pos_args) == 0:
1432 return ExprNodes.TupleNode(node.pos, args=[], constant_result=())
1433 # This is a bit special - for iterables (including genexps),
1434 # Python actually overallocates and resizes a newly created
1435 # tuple incrementally while reading items, which we can't
1436 # easily do without explicit node support. Instead, we read
1437 # the items into a list and then copy them into a tuple of the
1438 # final size. This takes up to twice as much memory, but will
1439 # have to do until we have real support for genexps.
1440 result = self._transform_list_set_genexpr(node, pos_args, ExprNodes.ListNode)
1441 if result is not node:
1442 return ExprNodes.AsTupleNode(node.pos, arg=result)
1445 def _handle_simple_function_list(self, node, pos_args):
1446 if len(pos_args) == 0:
1447 return ExprNodes.ListNode(node.pos, args=[], constant_result=[])
1448 return self._transform_list_set_genexpr(node, pos_args, ExprNodes.ListNode)
1450 def _handle_simple_function_set(self, node, pos_args):
1451 if len(pos_args) == 0:
1452 return ExprNodes.SetNode(node.pos, args=[], constant_result=set())
1453 return self._transform_list_set_genexpr(node, pos_args, ExprNodes.SetNode)
1455 def _transform_list_set_genexpr(self, node, pos_args, container_node_class):
1456 """Replace set(genexpr) and list(genexpr) by a literal comprehension.
1458 if len(pos_args) > 1:
1460 if not isinstance(pos_args[0], ExprNodes.GeneratorExpressionNode):
1462 gen_expr_node = pos_args[0]
1463 loop_node = gen_expr_node.loop
1465 yield_expression, yield_stat_node = self._find_single_yield_expression(loop_node)
1466 if yield_expression is None:
1469 target_node = container_node_class(node.pos, args=[])
1470 append_node = ExprNodes.ComprehensionAppendNode(
1471 yield_expression.pos,
1472 expr = yield_expression,
1473 target = ExprNodes.CloneNode(target_node))
1475 Visitor.recursively_replace_node(loop_node, yield_stat_node, append_node)
1477 setcomp = ExprNodes.ComprehensionNode(
1479 has_local_scope = True,
1480 expr_scope = gen_expr_node.expr_scope,
1482 append = append_node,
1483 target = target_node)
1484 append_node.target = setcomp
1487 def _handle_simple_function_dict(self, node, pos_args):
1488 """Replace dict( (a,b) for ... ) by a literal { a:b for ... }.
1490 if len(pos_args) == 0:
1491 return ExprNodes.DictNode(node.pos, key_value_pairs=[], constant_result={})
1492 if len(pos_args) > 1:
1494 if not isinstance(pos_args[0], ExprNodes.GeneratorExpressionNode):
1496 gen_expr_node = pos_args[0]
1497 loop_node = gen_expr_node.loop
1499 yield_expression, yield_stat_node = self._find_single_yield_expression(loop_node)
1500 if yield_expression is None:
1503 if not isinstance(yield_expression, ExprNodes.TupleNode):
1505 if len(yield_expression.args) != 2:
1508 target_node = ExprNodes.DictNode(node.pos, key_value_pairs=[])
1509 append_node = ExprNodes.DictComprehensionAppendNode(
1510 yield_expression.pos,
1511 key_expr = yield_expression.args[0],
1512 value_expr = yield_expression.args[1],
1513 target = ExprNodes.CloneNode(target_node))
1515 Visitor.recursively_replace_node(loop_node, yield_stat_node, append_node)
1517 dictcomp = ExprNodes.ComprehensionNode(
1519 has_local_scope = True,
1520 expr_scope = gen_expr_node.expr_scope,
1522 append = append_node,
1523 target = target_node)
1524 append_node.target = dictcomp
1527 # specific handlers for general call nodes
1529 def _handle_general_function_dict(self, node, pos_args, kwargs):
1530 """Replace dict(a=b,c=d,...) by the underlying keyword dict
1531 construction which is done anyway.
1533 if len(pos_args) > 0:
1535 if not isinstance(kwargs, ExprNodes.DictNode):
1537 if node.starstar_arg:
1538 # we could optimize this by updating the kw dict instead
1543 class OptimizeBuiltinCalls(Visitor.EnvTransform):
1544 """Optimize some common methods calls and instantiation patterns
1545 for builtin types *after* the type analysis phase.
1547 Running after type analysis, this transform can only perform
1548 function replacements that do not alter the function return type
1549 in a way that was not anticipated by the type analysis.
1551 # only intercept on call nodes
1552 visit_Node = Visitor.VisitorTransform.recurse_to_children
1554 def visit_GeneralCallNode(self, node):
1555 self.visitchildren(node)
1556 function = node.function
1557 if not function.type.is_pyobject:
1559 arg_tuple = node.positional_args
1560 if not isinstance(arg_tuple, ExprNodes.TupleNode):
1562 if node.starstar_arg:
1564 args = arg_tuple.args
1565 return self._dispatch_to_handler(
1566 node, function, args, node.keyword_args)
1568 def visit_SimpleCallNode(self, node):
1569 self.visitchildren(node)
1570 function = node.function
1571 if function.type.is_pyobject:
1572 arg_tuple = node.arg_tuple
1573 if not isinstance(arg_tuple, ExprNodes.TupleNode):
1575 args = arg_tuple.args
1578 return self._dispatch_to_handler(
1579 node, function, args)
1581 ### cleanup to avoid redundant coercions to/from Python types
1583 def _visit_PyTypeTestNode(self, node):
1584 # disabled - appears to break assignments in some cases, and
1585 # also drops a None check, which might still be required
1586 """Flatten redundant type checks after tree changes.
1589 self.visitchildren(node)
1590 if old_arg is node.arg or node.arg.type != node.type:
1594 def visit_TypecastNode(self, node):
1596 Drop redundant type casts.
1598 self.visitchildren(node)
1599 if node.type == node.operand.type:
1603 def visit_CoerceToBooleanNode(self, node):
1604 """Drop redundant conversion nodes after tree changes.
1606 self.visitchildren(node)
1608 if isinstance(arg, ExprNodes.PyTypeTestNode):
1610 if isinstance(arg, ExprNodes.CoerceToPyTypeNode):
1611 if arg.type in (PyrexTypes.py_object_type, Builtin.bool_type):
1612 return arg.arg.coerce_to_boolean(self.current_env())
1615 def visit_CoerceFromPyTypeNode(self, node):
1616 """Drop redundant conversion nodes after tree changes.
1618 Also, optimise away calls to Python's builtin int() and
1619 float() if the result is going to be coerced back into a C
1622 self.visitchildren(node)
1624 if not arg.type.is_pyobject:
1625 # no Python conversion left at all, just do a C coercion instead
1626 if node.type == arg.type:
1629 return arg.coerce_to(node.type, self.current_env())
1630 if isinstance(arg, ExprNodes.PyTypeTestNode):
1632 if isinstance(arg, ExprNodes.CoerceToPyTypeNode):
1633 if arg.type is PyrexTypes.py_object_type:
1634 if node.type.assignable_from(arg.arg.type):
1635 # completely redundant C->Py->C coercion
1636 return arg.arg.coerce_to(node.type, self.current_env())
1637 if isinstance(arg, ExprNodes.SimpleCallNode):
1638 if node.type.is_int or node.type.is_float:
1639 return self._optimise_numeric_cast_call(node, arg)
1640 elif isinstance(arg, ExprNodes.IndexNode) and not arg.is_buffer_access:
1641 index_node = arg.index
1642 if isinstance(index_node, ExprNodes.CoerceToPyTypeNode):
1643 index_node = index_node.arg
1644 if index_node.type.is_int:
1645 return self._optimise_int_indexing(node, arg, index_node)
1648 PyBytes_GetItemInt_func_type = PyrexTypes.CFuncType(
1649 PyrexTypes.c_char_type, [
1650 PyrexTypes.CFuncTypeArg("bytes", Builtin.bytes_type, None),
1651 PyrexTypes.CFuncTypeArg("index", PyrexTypes.c_py_ssize_t_type, None),
1652 PyrexTypes.CFuncTypeArg("check_bounds", PyrexTypes.c_int_type, None),
1654 exception_value = "((char)-1)",
1655 exception_check = True)
1657 def _optimise_int_indexing(self, coerce_node, arg, index_node):
1658 env = self.current_env()
1659 bound_check_bool = env.directives['boundscheck'] and 1 or 0
1660 if arg.base.type is Builtin.bytes_type:
1661 if coerce_node.type in (PyrexTypes.c_char_type, PyrexTypes.c_uchar_type):
1662 # bytes[index] -> char
1663 bound_check_node = ExprNodes.IntNode(
1664 coerce_node.pos, value=str(bound_check_bool),
1665 constant_result=bound_check_bool)
1666 node = ExprNodes.PythonCapiCallNode(
1667 coerce_node.pos, "__Pyx_PyBytes_GetItemInt",
1668 self.PyBytes_GetItemInt_func_type,
1670 arg.base.as_none_safe_node("'NoneType' object is not subscriptable"),
1671 index_node.coerce_to(PyrexTypes.c_py_ssize_t_type, env),
1675 utility_code=bytes_index_utility_code)
1676 if coerce_node.type is not PyrexTypes.c_char_type:
1677 node = node.coerce_to(coerce_node.type, env)
1681 def _optimise_numeric_cast_call(self, node, arg):
1682 function = arg.function
1683 if not isinstance(function, ExprNodes.NameNode) \
1684 or not function.type.is_builtin_type \
1685 or not isinstance(arg.arg_tuple, ExprNodes.TupleNode):
1687 args = arg.arg_tuple.args
1691 if isinstance(func_arg, ExprNodes.CoerceToPyTypeNode):
1692 func_arg = func_arg.arg
1693 elif func_arg.type.is_pyobject:
1694 # play safe: Python conversion might work on all sorts of things
1696 if function.name == 'int':
1697 if func_arg.type.is_int or node.type.is_int:
1698 if func_arg.type == node.type:
1700 elif node.type.assignable_from(func_arg.type) or func_arg.type.is_float:
1701 return ExprNodes.TypecastNode(
1702 node.pos, operand=func_arg, type=node.type)
1703 elif function.name == 'float':
1704 if func_arg.type.is_float or node.type.is_float:
1705 if func_arg.type == node.type:
1707 elif node.type.assignable_from(func_arg.type) or func_arg.type.is_float:
1708 return ExprNodes.TypecastNode(
1709 node.pos, operand=func_arg, type=node.type)
1712 ### dispatch to specific optimisers
1714 def _find_handler(self, match_name, has_kwargs):
1715 call_type = has_kwargs and 'general' or 'simple'
1716 handler = getattr(self, '_handle_%s_%s' % (call_type, match_name), None)
1718 handler = getattr(self, '_handle_any_%s' % match_name, None)
1721 def _dispatch_to_handler(self, node, function, arg_list, kwargs=None):
1722 if function.is_name:
1723 # we only consider functions that are either builtin
1724 # Python functions or builtins that were already replaced
1725 # into a C function call (defined in the builtin scope)
1726 if not function.entry:
1728 is_builtin = function.entry.is_builtin or \
1729 function.entry is self.current_env().builtin_scope().lookup_here(function.name)
1732 function_handler = self._find_handler(
1733 "function_%s" % function.name, kwargs)
1734 if function_handler is None:
1737 return function_handler(node, arg_list, kwargs)
1739 return function_handler(node, arg_list)
1740 elif function.is_attribute and function.type.is_pyobject:
1741 attr_name = function.attribute
1742 self_arg = function.obj
1743 obj_type = self_arg.type
1744 is_unbound_method = False
1745 if obj_type.is_builtin_type:
1746 if obj_type is Builtin.type_type and arg_list and \
1747 arg_list[0].type.is_pyobject:
1748 # calling an unbound method like 'list.append(L,x)'
1749 # (ignoring 'type.mro()' here ...)
1750 type_name = function.obj.name
1752 is_unbound_method = True
1754 type_name = obj_type.name
1756 type_name = "object" # safety measure
1757 method_handler = self._find_handler(
1758 "method_%s_%s" % (type_name, attr_name), kwargs)
1759 if method_handler is None:
1760 if attr_name in TypeSlots.method_name_to_slot \
1761 or attr_name == '__new__':
1762 method_handler = self._find_handler(
1763 "slot%s" % attr_name, kwargs)
1764 if method_handler is None:
1766 if self_arg is not None:
1767 arg_list = [self_arg] + list(arg_list)
1769 return method_handler(node, arg_list, kwargs, is_unbound_method)
1771 return method_handler(node, arg_list, is_unbound_method)
1775 def _error_wrong_arg_count(self, function_name, node, args, expected=None):
1776 if not expected: # None or 0
1778 elif isinstance(expected, basestring) or expected > 1:
1784 if expected is not None:
1785 expected_str = 'expected %s, ' % expected
1788 error(node.pos, "%s(%s) called with wrong number of args, %sfound %d" % (
1789 function_name, arg_str, expected_str, len(args)))
1793 PyDict_Copy_func_type = PyrexTypes.CFuncType(
1794 Builtin.dict_type, [
1795 PyrexTypes.CFuncTypeArg("dict", Builtin.dict_type, None)
1798 def _handle_simple_function_dict(self, node, pos_args):
1799 """Replace dict(some_dict) by PyDict_Copy(some_dict).
1801 if len(pos_args) != 1:
1804 if arg.type is Builtin.dict_type:
1805 arg = arg.as_none_safe_node("'NoneType' is not iterable")
1806 return ExprNodes.PythonCapiCallNode(
1807 node.pos, "PyDict_Copy", self.PyDict_Copy_func_type,
1809 is_temp = node.is_temp
1813 PyList_AsTuple_func_type = PyrexTypes.CFuncType(
1814 Builtin.tuple_type, [
1815 PyrexTypes.CFuncTypeArg("list", Builtin.list_type, None)
1818 def _handle_simple_function_tuple(self, node, pos_args):
1819 """Replace tuple([...]) by a call to PyList_AsTuple.
1821 if len(pos_args) != 1:
1823 list_arg = pos_args[0]
1824 if list_arg.type is not Builtin.list_type:
1826 if not isinstance(list_arg, (ExprNodes.ComprehensionNode,
1827 ExprNodes.ListNode)):
1828 pos_args[0] = list_arg.as_none_safe_node(
1829 "'NoneType' object is not iterable")
1831 return ExprNodes.PythonCapiCallNode(
1832 node.pos, "PyList_AsTuple", self.PyList_AsTuple_func_type,
1834 is_temp = node.is_temp
1837 PyObject_AsDouble_func_type = PyrexTypes.CFuncType(
1838 PyrexTypes.c_double_type, [
1839 PyrexTypes.CFuncTypeArg("obj", PyrexTypes.py_object_type, None),
1841 exception_value = "((double)-1)",
1842 exception_check = True)
1844 def _handle_simple_function_float(self, node, pos_args):
1845 """Transform float() into either a C type cast or a faster C
1848 # Note: this requires the float() function to be typed as
1849 # returning a C 'double'
1850 if len(pos_args) == 0:
1851 return ExprNodes.FloatNode(
1852 node, value="0.0", constant_result=0.0
1853 ).coerce_to(Builtin.float_type, self.current_env())
1854 elif len(pos_args) != 1:
1855 self._error_wrong_arg_count('float', node, pos_args, '0 or 1')
1857 func_arg = pos_args[0]
1858 if isinstance(func_arg, ExprNodes.CoerceToPyTypeNode):
1859 func_arg = func_arg.arg
1860 if func_arg.type is PyrexTypes.c_double_type:
1862 elif node.type.assignable_from(func_arg.type) or func_arg.type.is_numeric:
1863 return ExprNodes.TypecastNode(
1864 node.pos, operand=func_arg, type=node.type)
1865 return ExprNodes.PythonCapiCallNode(
1866 node.pos, "__Pyx_PyObject_AsDouble",
1867 self.PyObject_AsDouble_func_type,
1869 is_temp = node.is_temp,
1870 utility_code = pyobject_as_double_utility_code,
1873 def _handle_simple_function_bool(self, node, pos_args):
1874 """Transform bool(x) into a type coercion to a boolean.
1876 if len(pos_args) == 0:
1877 return ExprNodes.BoolNode(
1878 node.pos, value=False, constant_result=False
1879 ).coerce_to(Builtin.bool_type, self.current_env())
1880 elif len(pos_args) != 1:
1881 self._error_wrong_arg_count('bool', node, pos_args, '0 or 1')
1884 # => !!<bint>(x) to make sure it's exactly 0 or 1
1885 operand = pos_args[0].coerce_to_boolean(self.current_env())
1886 operand = ExprNodes.NotNode(node.pos, operand = operand)
1887 operand = ExprNodes.NotNode(node.pos, operand = operand)
1888 # coerce back to Python object as that's the result we are expecting
1889 return operand.coerce_to_pyobject(self.current_env())
1891 ### builtin functions
1893 Pyx_strlen_func_type = PyrexTypes.CFuncType(
1894 PyrexTypes.c_size_t_type, [
1895 PyrexTypes.CFuncTypeArg("bytes", PyrexTypes.c_char_ptr_type, None)
1898 PyObject_Size_func_type = PyrexTypes.CFuncType(
1899 PyrexTypes.c_py_ssize_t_type, [
1900 PyrexTypes.CFuncTypeArg("obj", PyrexTypes.py_object_type, None)
1903 _map_to_capi_len_function = {
1904 Builtin.unicode_type : "PyUnicode_GET_SIZE",
1905 Builtin.bytes_type : "PyBytes_GET_SIZE",
1906 Builtin.list_type : "PyList_GET_SIZE",
1907 Builtin.tuple_type : "PyTuple_GET_SIZE",
1908 Builtin.dict_type : "PyDict_Size",
1909 Builtin.set_type : "PySet_Size",
1910 Builtin.frozenset_type : "PySet_Size",
1913 def _handle_simple_function_len(self, node, pos_args):
1914 """Replace len(char*) by the equivalent call to strlen() and
1915 len(known_builtin_type) by an equivalent C-API call.
1917 if len(pos_args) != 1:
1918 self._error_wrong_arg_count('len', node, pos_args, 1)
1921 if isinstance(arg, ExprNodes.CoerceToPyTypeNode):
1923 if arg.type.is_string:
1924 new_node = ExprNodes.PythonCapiCallNode(
1925 node.pos, "strlen", self.Pyx_strlen_func_type,
1927 is_temp = node.is_temp,
1928 utility_code = Builtin.include_string_h_utility_code)
1929 elif arg.type.is_pyobject:
1930 cfunc_name = self._map_to_capi_len_function(arg.type)
1931 if cfunc_name is None:
1933 arg = arg.as_none_safe_node(
1934 "object of type 'NoneType' has no len()")
1935 new_node = ExprNodes.PythonCapiCallNode(
1936 node.pos, cfunc_name, self.PyObject_Size_func_type,
1938 is_temp = node.is_temp)
1939 elif arg.type.is_unicode_char:
1940 return ExprNodes.IntNode(node.pos, value='1', constant_result=1,
1944 if node.type not in (PyrexTypes.c_size_t_type, PyrexTypes.c_py_ssize_t_type):
1945 new_node = new_node.coerce_to(node.type, self.current_env())
1948 Pyx_Type_func_type = PyrexTypes.CFuncType(
1949 Builtin.type_type, [
1950 PyrexTypes.CFuncTypeArg("object", PyrexTypes.py_object_type, None)
1953 def _handle_simple_function_type(self, node, pos_args):
1954 """Replace type(o) by a macro call to Py_TYPE(o).
1956 if len(pos_args) != 1:
1958 node = ExprNodes.PythonCapiCallNode(
1959 node.pos, "Py_TYPE", self.Pyx_Type_func_type,
1962 return ExprNodes.CastNode(node, PyrexTypes.py_object_type)
1964 Py_type_check_func_type = PyrexTypes.CFuncType(
1965 PyrexTypes.c_bint_type, [
1966 PyrexTypes.CFuncTypeArg("arg", PyrexTypes.py_object_type, None)
1969 def _handle_simple_function_isinstance(self, node, pos_args):
1970 """Replace isinstance() checks against builtin types by the
1971 corresponding C-API call.
1973 if len(pos_args) != 2:
1975 arg, types = pos_args
1977 if isinstance(types, ExprNodes.TupleNode):
1979 arg = temp = UtilNodes.ResultRefNode(arg)
1980 elif types.type is Builtin.type_type:
1987 env = self.current_env()
1988 for test_type_node in types:
1990 if isinstance(test_type_node, ExprNodes.NameNode):
1991 if test_type_node.entry:
1992 entry = env.lookup(test_type_node.entry.name)
1993 if entry and entry.type and entry.type.is_builtin_type:
1994 builtin_type = entry.type
1995 if builtin_type and builtin_type is not Builtin.type_type:
1996 type_check_function = entry.type.type_check_function(exact=False)
1997 if type_check_function in tests:
1999 tests.append(type_check_function)
2000 type_check_args = [arg]
2001 elif test_type_node.type is Builtin.type_type:
2002 type_check_function = '__Pyx_TypeCheck'
2003 type_check_args = [arg, test_type_node]
2007 ExprNodes.PythonCapiCallNode(
2008 test_type_node.pos, type_check_function, self.Py_type_check_func_type,
2009 args = type_check_args,
2013 def join_with_or(a,b, make_binop_node=ExprNodes.binop_node):
2014 or_node = make_binop_node(node.pos, 'or', a, b)
2015 or_node.type = PyrexTypes.c_bint_type
2016 or_node.is_temp = True
2019 test_node = reduce(join_with_or, test_nodes).coerce_to(node.type, env)
2020 if temp is not None:
2021 test_node = UtilNodes.EvalWithTempExprNode(temp, test_node)
2024 def _handle_simple_function_ord(self, node, pos_args):
2025 """Unpack ord(Py_UNICODE).
2027 if len(pos_args) != 1:
2030 if isinstance(arg, ExprNodes.CoerceToPyTypeNode):
2031 if arg.arg.type.is_unicode_char:
2032 return arg.arg.coerce_to(node.type, self.current_env())
2037 Pyx_tp_new_func_type = PyrexTypes.CFuncType(
2038 PyrexTypes.py_object_type, [
2039 PyrexTypes.CFuncTypeArg("type", Builtin.type_type, None)
2042 def _handle_simple_slot__new__(self, node, args, is_unbound_method):
2043 """Replace 'exttype.__new__(exttype)' by a call to exttype->tp_new()
2045 obj = node.function.obj
2046 if not is_unbound_method or len(args) != 1:
2049 if not obj.is_name or not type_arg.is_name:
2052 if obj.type != Builtin.type_type or type_arg.type != Builtin.type_type:
2053 # not a known type, play safe
2055 if not type_arg.type_entry or not obj.type_entry:
2056 if obj.name != type_arg.name:
2058 # otherwise, we know it's a type and we know it's the same
2059 # type for both - that should do
2060 elif type_arg.type_entry != obj.type_entry:
2061 # different types - may or may not lead to an error at runtime
2064 # FIXME: we could potentially look up the actual tp_new C
2065 # method of the extension type and call that instead of the
2066 # generic slot. That would also allow us to pass parameters
2069 if not type_arg.type_entry:
2070 # arbitrary variable, needs a None check for safety
2071 type_arg = type_arg.as_none_safe_node(
2072 "object.__new__(X): X is not a type object (NoneType)")
2074 return ExprNodes.PythonCapiCallNode(
2075 node.pos, "__Pyx_tp_new", self.Pyx_tp_new_func_type,
2077 utility_code = tpnew_utility_code,
2078 is_temp = node.is_temp
2081 ### methods of builtin types
2083 PyObject_Append_func_type = PyrexTypes.CFuncType(
2084 PyrexTypes.py_object_type, [
2085 PyrexTypes.CFuncTypeArg("list", PyrexTypes.py_object_type, None),
2086 PyrexTypes.CFuncTypeArg("item", PyrexTypes.py_object_type, None),
2089 def _handle_simple_method_object_append(self, node, args, is_unbound_method):
2090 """Optimistic optimisation as X.append() is almost always
2091 referring to a list.
2096 return ExprNodes.PythonCapiCallNode(
2097 node.pos, "__Pyx_PyObject_Append", self.PyObject_Append_func_type,
2099 may_return_none = True,
2100 is_temp = node.is_temp,
2101 utility_code = append_utility_code
2104 PyObject_Pop_func_type = PyrexTypes.CFuncType(
2105 PyrexTypes.py_object_type, [
2106 PyrexTypes.CFuncTypeArg("list", PyrexTypes.py_object_type, None),
2109 PyObject_PopIndex_func_type = PyrexTypes.CFuncType(
2110 PyrexTypes.py_object_type, [
2111 PyrexTypes.CFuncTypeArg("list", PyrexTypes.py_object_type, None),
2112 PyrexTypes.CFuncTypeArg("index", PyrexTypes.c_long_type, None),
2115 def _handle_simple_method_object_pop(self, node, args, is_unbound_method):
2116 """Optimistic optimisation as X.pop([n]) is almost always
2117 referring to a list.
2120 return ExprNodes.PythonCapiCallNode(
2121 node.pos, "__Pyx_PyObject_Pop", self.PyObject_Pop_func_type,
2123 may_return_none = True,
2124 is_temp = node.is_temp,
2125 utility_code = pop_utility_code
2127 elif len(args) == 2:
2128 if isinstance(args[1], ExprNodes.CoerceToPyTypeNode) and args[1].arg.type.is_int:
2129 original_type = args[1].arg.type
2130 if PyrexTypes.widest_numeric_type(original_type, PyrexTypes.c_py_ssize_t_type) == PyrexTypes.c_py_ssize_t_type:
2131 args[1] = args[1].arg
2132 return ExprNodes.PythonCapiCallNode(
2133 node.pos, "__Pyx_PyObject_PopIndex", self.PyObject_PopIndex_func_type,
2135 may_return_none = True,
2136 is_temp = node.is_temp,
2137 utility_code = pop_index_utility_code
2142 _handle_simple_method_list_pop = _handle_simple_method_object_pop
2144 single_param_func_type = PyrexTypes.CFuncType(
2145 PyrexTypes.c_int_type, [
2146 PyrexTypes.CFuncTypeArg("obj", PyrexTypes.py_object_type, None),
2148 exception_value = "-1")
2150 def _handle_simple_method_list_sort(self, node, args, is_unbound_method):
2151 """Call PyList_Sort() instead of the 0-argument l.sort().
2155 return self._substitute_method_call(
2156 node, "PyList_Sort", self.single_param_func_type,
2157 'sort', is_unbound_method, args)
2159 Pyx_PyDict_GetItem_func_type = PyrexTypes.CFuncType(
2160 PyrexTypes.py_object_type, [
2161 PyrexTypes.CFuncTypeArg("dict", PyrexTypes.py_object_type, None),
2162 PyrexTypes.CFuncTypeArg("key", PyrexTypes.py_object_type, None),
2163 PyrexTypes.CFuncTypeArg("default", PyrexTypes.py_object_type, None),
2166 def _handle_simple_method_dict_get(self, node, args, is_unbound_method):
2167 """Replace dict.get() by a call to PyDict_GetItem().
2170 args.append(ExprNodes.NoneNode(node.pos))
2171 elif len(args) != 3:
2172 self._error_wrong_arg_count('dict.get', node, args, "2 or 3")
2175 return self._substitute_method_call(
2176 node, "__Pyx_PyDict_GetItemDefault", self.Pyx_PyDict_GetItem_func_type,
2177 'get', is_unbound_method, args,
2178 may_return_none = True,
2179 utility_code = dict_getitem_default_utility_code)
2182 ### unicode type methods
2184 PyUnicode_uchar_predicate_func_type = PyrexTypes.CFuncType(
2185 PyrexTypes.c_bint_type, [
2186 PyrexTypes.CFuncTypeArg("uchar", PyrexTypes.c_py_unicode_type, None),
2189 def _inject_unicode_predicate(self, node, args, is_unbound_method):
2190 if is_unbound_method or len(args) != 1:
2193 if not isinstance(ustring, ExprNodes.CoerceToPyTypeNode) or \
2194 not ustring.arg.type.is_unicode_char:
2197 method_name = node.function.attribute
2198 if method_name == 'istitle':
2199 # istitle() doesn't directly map to Py_UNICODE_ISTITLE()
2200 utility_code = py_unicode_istitle_utility_code
2201 function_name = '__Pyx_Py_UNICODE_ISTITLE'
2204 function_name = 'Py_UNICODE_%s' % method_name.upper()
2205 func_call = self._substitute_method_call(
2206 node, function_name, self.PyUnicode_uchar_predicate_func_type,
2207 method_name, is_unbound_method, [uchar],
2208 utility_code = utility_code)
2209 if node.type.is_pyobject:
2210 func_call = func_call.coerce_to_pyobject(self.current_env)
2213 _handle_simple_method_unicode_isalnum = _inject_unicode_predicate
2214 _handle_simple_method_unicode_isalpha = _inject_unicode_predicate
2215 _handle_simple_method_unicode_isdecimal = _inject_unicode_predicate
2216 _handle_simple_method_unicode_isdigit = _inject_unicode_predicate
2217 _handle_simple_method_unicode_islower = _inject_unicode_predicate
2218 _handle_simple_method_unicode_isnumeric = _inject_unicode_predicate
2219 _handle_simple_method_unicode_isspace = _inject_unicode_predicate
2220 _handle_simple_method_unicode_istitle = _inject_unicode_predicate
2221 _handle_simple_method_unicode_isupper = _inject_unicode_predicate
2223 PyUnicode_uchar_conversion_func_type = PyrexTypes.CFuncType(
2224 PyrexTypes.c_py_unicode_type, [
2225 PyrexTypes.CFuncTypeArg("uchar", PyrexTypes.c_py_unicode_type, None),
2228 def _inject_unicode_character_conversion(self, node, args, is_unbound_method):
2229 if is_unbound_method or len(args) != 1:
2232 if not isinstance(ustring, ExprNodes.CoerceToPyTypeNode) or \
2233 not ustring.arg.type.is_unicode_char:
2236 method_name = node.function.attribute
2237 function_name = 'Py_UNICODE_TO%s' % method_name.upper()
2238 func_call = self._substitute_method_call(
2239 node, function_name, self.PyUnicode_uchar_conversion_func_type,
2240 method_name, is_unbound_method, [uchar])
2241 if node.type.is_pyobject:
2242 func_call = func_call.coerce_to_pyobject(self.current_env)
2245 _handle_simple_method_unicode_lower = _inject_unicode_character_conversion
2246 _handle_simple_method_unicode_upper = _inject_unicode_character_conversion
2247 _handle_simple_method_unicode_title = _inject_unicode_character_conversion
2249 PyUnicode_Splitlines_func_type = PyrexTypes.CFuncType(
2250 Builtin.list_type, [
2251 PyrexTypes.CFuncTypeArg("str", Builtin.unicode_type, None),
2252 PyrexTypes.CFuncTypeArg("keepends", PyrexTypes.c_bint_type, None),
2255 def _handle_simple_method_unicode_splitlines(self, node, args, is_unbound_method):
2256 """Replace unicode.splitlines(...) by a direct call to the
2257 corresponding C-API function.
2259 if len(args) not in (1,2):
2260 self._error_wrong_arg_count('unicode.splitlines', node, args, "1 or 2")
2262 self._inject_bint_default_argument(node, args, 1, False)
2264 return self._substitute_method_call(
2265 node, "PyUnicode_Splitlines", self.PyUnicode_Splitlines_func_type,
2266 'splitlines', is_unbound_method, args)
2268 PyUnicode_Split_func_type = PyrexTypes.CFuncType(
2269 Builtin.list_type, [
2270 PyrexTypes.CFuncTypeArg("str", Builtin.unicode_type, None),
2271 PyrexTypes.CFuncTypeArg("sep", PyrexTypes.py_object_type, None),
2272 PyrexTypes.CFuncTypeArg("maxsplit", PyrexTypes.c_py_ssize_t_type, None),
2276 def _handle_simple_method_unicode_split(self, node, args, is_unbound_method):
2277 """Replace unicode.split(...) by a direct call to the
2278 corresponding C-API function.
2280 if len(args) not in (1,2,3):
2281 self._error_wrong_arg_count('unicode.split', node, args, "1-3")
2284 args.append(ExprNodes.NullNode(node.pos))
2285 self._inject_int_default_argument(
2286 node, args, 2, PyrexTypes.c_py_ssize_t_type, "-1")
2288 return self._substitute_method_call(
2289 node, "PyUnicode_Split", self.PyUnicode_Split_func_type,
2290 'split', is_unbound_method, args)
2292 PyUnicode_Tailmatch_func_type = PyrexTypes.CFuncType(
2293 PyrexTypes.c_bint_type, [
2294 PyrexTypes.CFuncTypeArg("str", Builtin.unicode_type, None),
2295 PyrexTypes.CFuncTypeArg("substring", PyrexTypes.py_object_type, None),
2296 PyrexTypes.CFuncTypeArg("start", PyrexTypes.c_py_ssize_t_type, None),
2297 PyrexTypes.CFuncTypeArg("end", PyrexTypes.c_py_ssize_t_type, None),
2298 PyrexTypes.CFuncTypeArg("direction", PyrexTypes.c_int_type, None),
2300 exception_value = '-1')
2302 def _handle_simple_method_unicode_endswith(self, node, args, is_unbound_method):
2303 return self._inject_unicode_tailmatch(
2304 node, args, is_unbound_method, 'endswith', +1)
2306 def _handle_simple_method_unicode_startswith(self, node, args, is_unbound_method):
2307 return self._inject_unicode_tailmatch(
2308 node, args, is_unbound_method, 'startswith', -1)
2310 def _inject_unicode_tailmatch(self, node, args, is_unbound_method,
2311 method_name, direction):
2312 """Replace unicode.startswith(...) and unicode.endswith(...)
2313 by a direct call to the corresponding C-API function.
2315 if len(args) not in (2,3,4):
2316 self._error_wrong_arg_count('unicode.%s' % method_name, node, args, "2-4")
2318 self._inject_int_default_argument(
2319 node, args, 2, PyrexTypes.c_py_ssize_t_type, "0")
2320 self._inject_int_default_argument(
2321 node, args, 3, PyrexTypes.c_py_ssize_t_type, "PY_SSIZE_T_MAX")
2322 args.append(ExprNodes.IntNode(
2323 node.pos, value=str(direction), type=PyrexTypes.c_int_type))
2325 method_call = self._substitute_method_call(
2326 node, "__Pyx_PyUnicode_Tailmatch", self.PyUnicode_Tailmatch_func_type,
2327 method_name, is_unbound_method, args,
2328 utility_code = unicode_tailmatch_utility_code)
2329 return method_call.coerce_to(Builtin.bool_type, self.current_env())
2331 PyUnicode_Find_func_type = PyrexTypes.CFuncType(
2332 PyrexTypes.c_py_ssize_t_type, [
2333 PyrexTypes.CFuncTypeArg("str", Builtin.unicode_type, None),
2334 PyrexTypes.CFuncTypeArg("substring", PyrexTypes.py_object_type, None),
2335 PyrexTypes.CFuncTypeArg("start", PyrexTypes.c_py_ssize_t_type, None),
2336 PyrexTypes.CFuncTypeArg("end", PyrexTypes.c_py_ssize_t_type, None),
2337 PyrexTypes.CFuncTypeArg("direction", PyrexTypes.c_int_type, None),
2339 exception_value = '-2')
2341 def _handle_simple_method_unicode_find(self, node, args, is_unbound_method):
2342 return self._inject_unicode_find(
2343 node, args, is_unbound_method, 'find', +1)
2345 def _handle_simple_method_unicode_rfind(self, node, args, is_unbound_method):
2346 return self._inject_unicode_find(
2347 node, args, is_unbound_method, 'rfind', -1)
2349 def _inject_unicode_find(self, node, args, is_unbound_method,
2350 method_name, direction):
2351 """Replace unicode.find(...) and unicode.rfind(...) by a
2352 direct call to the corresponding C-API function.
2354 if len(args) not in (2,3,4):
2355 self._error_wrong_arg_count('unicode.%s' % method_name, node, args, "2-4")
2357 self._inject_int_default_argument(
2358 node, args, 2, PyrexTypes.c_py_ssize_t_type, "0")
2359 self._inject_int_default_argument(
2360 node, args, 3, PyrexTypes.c_py_ssize_t_type, "PY_SSIZE_T_MAX")
2361 args.append(ExprNodes.IntNode(
2362 node.pos, value=str(direction), type=PyrexTypes.c_int_type))
2364 method_call = self._substitute_method_call(
2365 node, "PyUnicode_Find", self.PyUnicode_Find_func_type,
2366 method_name, is_unbound_method, args)
2367 return method_call.coerce_to_pyobject(self.current_env())
2369 PyUnicode_Count_func_type = PyrexTypes.CFuncType(
2370 PyrexTypes.c_py_ssize_t_type, [
2371 PyrexTypes.CFuncTypeArg("str", Builtin.unicode_type, None),
2372 PyrexTypes.CFuncTypeArg("substring", PyrexTypes.py_object_type, None),
2373 PyrexTypes.CFuncTypeArg("start", PyrexTypes.c_py_ssize_t_type, None),
2374 PyrexTypes.CFuncTypeArg("end", PyrexTypes.c_py_ssize_t_type, None),
2376 exception_value = '-1')
2378 def _handle_simple_method_unicode_count(self, node, args, is_unbound_method):
2379 """Replace unicode.count(...) by a direct call to the
2380 corresponding C-API function.
2382 if len(args) not in (2,3,4):
2383 self._error_wrong_arg_count('unicode.count', node, args, "2-4")
2385 self._inject_int_default_argument(
2386 node, args, 2, PyrexTypes.c_py_ssize_t_type, "0")
2387 self._inject_int_default_argument(
2388 node, args, 3, PyrexTypes.c_py_ssize_t_type, "PY_SSIZE_T_MAX")
2390 method_call = self._substitute_method_call(
2391 node, "PyUnicode_Count", self.PyUnicode_Count_func_type,
2392 'count', is_unbound_method, args)
2393 return method_call.coerce_to_pyobject(self.current_env())
2395 PyUnicode_Replace_func_type = PyrexTypes.CFuncType(
2396 Builtin.unicode_type, [
2397 PyrexTypes.CFuncTypeArg("str", Builtin.unicode_type, None),
2398 PyrexTypes.CFuncTypeArg("substring", PyrexTypes.py_object_type, None),
2399 PyrexTypes.CFuncTypeArg("replstr", PyrexTypes.py_object_type, None),
2400 PyrexTypes.CFuncTypeArg("maxcount", PyrexTypes.c_py_ssize_t_type, None),
2403 def _handle_simple_method_unicode_replace(self, node, args, is_unbound_method):
2404 """Replace unicode.replace(...) by a direct call to the
2405 corresponding C-API function.
2407 if len(args) not in (3,4):
2408 self._error_wrong_arg_count('unicode.replace', node, args, "3-4")
2410 self._inject_int_default_argument(
2411 node, args, 3, PyrexTypes.c_py_ssize_t_type, "-1")
2413 return self._substitute_method_call(
2414 node, "PyUnicode_Replace", self.PyUnicode_Replace_func_type,
2415 'replace', is_unbound_method, args)
2417 PyUnicode_AsEncodedString_func_type = PyrexTypes.CFuncType(
2418 Builtin.bytes_type, [
2419 PyrexTypes.CFuncTypeArg("obj", Builtin.unicode_type, None),
2420 PyrexTypes.CFuncTypeArg("encoding", PyrexTypes.c_char_ptr_type, None),
2421 PyrexTypes.CFuncTypeArg("errors", PyrexTypes.c_char_ptr_type, None),
2424 PyUnicode_AsXyzString_func_type = PyrexTypes.CFuncType(
2425 Builtin.bytes_type, [
2426 PyrexTypes.CFuncTypeArg("obj", Builtin.unicode_type, None),
2429 _special_encodings = ['UTF8', 'UTF16', 'Latin1', 'ASCII',
2430 'unicode_escape', 'raw_unicode_escape']
2432 _special_codecs = [ (name, codecs.getencoder(name))
2433 for name in _special_encodings ]
2435 def _handle_simple_method_unicode_encode(self, node, args, is_unbound_method):
2436 """Replace unicode.encode(...) by a direct C-API call to the
2437 corresponding codec.
2439 if len(args) < 1 or len(args) > 3:
2440 self._error_wrong_arg_count('unicode.encode', node, args, '1-3')
2443 string_node = args[0]
2446 null_node = ExprNodes.NullNode(node.pos)
2447 return self._substitute_method_call(
2448 node, "PyUnicode_AsEncodedString",
2449 self.PyUnicode_AsEncodedString_func_type,
2450 'encode', is_unbound_method, [string_node, null_node, null_node])
2452 parameters = self._unpack_encoding_and_error_mode(node.pos, args)
2453 if parameters is None:
2455 encoding, encoding_node, error_handling, error_handling_node = parameters
2457 if isinstance(string_node, ExprNodes.UnicodeNode):
2458 # constant, so try to do the encoding at compile time
2460 value = string_node.value.encode(encoding, error_handling)
2462 # well, looks like we can't
2465 value = BytesLiteral(value)
2466 value.encoding = encoding
2467 return ExprNodes.BytesNode(
2468 string_node.pos, value=value, type=Builtin.bytes_type)
2470 if error_handling == 'strict':
2471 # try to find a specific encoder function
2472 codec_name = self._find_special_codec_name(encoding)
2473 if codec_name is not None:
2474 encode_function = "PyUnicode_As%sString" % codec_name
2475 return self._substitute_method_call(
2476 node, encode_function,
2477 self.PyUnicode_AsXyzString_func_type,
2478 'encode', is_unbound_method, [string_node])
2480 return self._substitute_method_call(
2481 node, "PyUnicode_AsEncodedString",
2482 self.PyUnicode_AsEncodedString_func_type,
2483 'encode', is_unbound_method,
2484 [string_node, encoding_node, error_handling_node])
2486 PyUnicode_DecodeXyz_func_type = PyrexTypes.CFuncType(
2487 Builtin.unicode_type, [
2488 PyrexTypes.CFuncTypeArg("string", PyrexTypes.c_char_ptr_type, None),
2489 PyrexTypes.CFuncTypeArg("size", PyrexTypes.c_py_ssize_t_type, None),
2490 PyrexTypes.CFuncTypeArg("errors", PyrexTypes.c_char_ptr_type, None),
2493 PyUnicode_Decode_func_type = PyrexTypes.CFuncType(
2494 Builtin.unicode_type, [
2495 PyrexTypes.CFuncTypeArg("string", PyrexTypes.c_char_ptr_type, None),
2496 PyrexTypes.CFuncTypeArg("size", PyrexTypes.c_py_ssize_t_type, None),
2497 PyrexTypes.CFuncTypeArg("encoding", PyrexTypes.c_char_ptr_type, None),
2498 PyrexTypes.CFuncTypeArg("errors", PyrexTypes.c_char_ptr_type, None),
2501 def _handle_simple_method_bytes_decode(self, node, args, is_unbound_method):
2502 """Replace char*.decode() by a direct C-API call to the
2503 corresponding codec, possibly resoving a slice on the char*.
2505 if len(args) < 1 or len(args) > 3:
2506 self._error_wrong_arg_count('bytes.decode', node, args, '1-3')
2509 if isinstance(args[0], ExprNodes.SliceIndexNode):
2510 index_node = args[0]
2511 string_node = index_node.base
2512 if not string_node.type.is_string:
2513 # nothing to optimise here
2515 start, stop = index_node.start, index_node.stop
2516 if not start or start.constant_result == 0:
2519 if start.type.is_pyobject:
2520 start = start.coerce_to(PyrexTypes.c_py_ssize_t_type, self.current_env())
2522 start = UtilNodes.LetRefNode(start)
2524 string_node = ExprNodes.AddNode(pos=start.pos,
2525 operand1=string_node,
2529 type=string_node.type
2531 if stop and stop.type.is_pyobject:
2532 stop = stop.coerce_to(PyrexTypes.c_py_ssize_t_type, self.current_env())
2533 elif isinstance(args[0], ExprNodes.CoerceToPyTypeNode) \
2534 and args[0].arg.type.is_string:
2535 # use strlen() to find the string length, just as CPython would
2537 string_node = args[0].arg
2539 # let Python do its job
2543 if start or not string_node.is_name:
2544 string_node = UtilNodes.LetRefNode(string_node)
2545 temps.append(string_node)
2546 stop = ExprNodes.PythonCapiCallNode(
2547 string_node.pos, "strlen", self.Pyx_strlen_func_type,
2548 args = [string_node],
2550 utility_code = Builtin.include_string_h_utility_code,
2551 ).coerce_to(PyrexTypes.c_py_ssize_t_type, self.current_env())
2553 stop = ExprNodes.SubNode(
2559 type = PyrexTypes.c_py_ssize_t_type
2562 parameters = self._unpack_encoding_and_error_mode(node.pos, args)
2563 if parameters is None:
2565 encoding, encoding_node, error_handling, error_handling_node = parameters
2567 # try to find a specific encoder function
2569 if encoding is not None:
2570 codec_name = self._find_special_codec_name(encoding)
2571 if codec_name is not None:
2572 decode_function = "PyUnicode_Decode%s" % codec_name
2573 node = ExprNodes.PythonCapiCallNode(
2574 node.pos, decode_function,
2575 self.PyUnicode_DecodeXyz_func_type,
2576 args = [string_node, stop, error_handling_node],
2577 is_temp = node.is_temp,
2580 node = ExprNodes.PythonCapiCallNode(
2581 node.pos, "PyUnicode_Decode",
2582 self.PyUnicode_Decode_func_type,
2583 args = [string_node, stop, encoding_node, error_handling_node],
2584 is_temp = node.is_temp,
2587 for temp in temps[::-1]:
2588 node = UtilNodes.EvalWithTempExprNode(temp, node)
2591 def _find_special_codec_name(self, encoding):
2593 requested_codec = codecs.getencoder(encoding)
2596 for name, codec in self._special_codecs:
2597 if codec == requested_codec:
2599 name = ''.join([ s.capitalize()
2600 for s in name.split('_')])
2604 def _unpack_encoding_and_error_mode(self, pos, args):
2605 null_node = ExprNodes.NullNode(pos)
2608 encoding_node = args[1]
2609 if isinstance(encoding_node, ExprNodes.CoerceToPyTypeNode):
2610 encoding_node = encoding_node.arg
2611 if isinstance(encoding_node, (ExprNodes.UnicodeNode, ExprNodes.StringNode,
2612 ExprNodes.BytesNode)):
2613 encoding = encoding_node.value
2614 encoding_node = ExprNodes.BytesNode(encoding_node.pos, value=encoding,
2615 type=PyrexTypes.c_char_ptr_type)
2616 elif encoding_node.type is Builtin.bytes_type:
2618 encoding_node = encoding_node.coerce_to(
2619 PyrexTypes.c_char_ptr_type, self.current_env())
2620 elif encoding_node.type.is_string:
2626 encoding_node = null_node
2629 error_handling_node = args[2]
2630 if isinstance(error_handling_node, ExprNodes.CoerceToPyTypeNode):
2631 error_handling_node = error_handling_node.arg
2632 if isinstance(error_handling_node,
2633 (ExprNodes.UnicodeNode, ExprNodes.StringNode,
2634 ExprNodes.BytesNode)):
2635 error_handling = error_handling_node.value
2636 if error_handling == 'strict':
2637 error_handling_node = null_node
2639 error_handling_node = ExprNodes.BytesNode(
2640 error_handling_node.pos, value=error_handling,
2641 type=PyrexTypes.c_char_ptr_type)
2642 elif error_handling_node.type is Builtin.bytes_type:
2643 error_handling = None
2644 error_handling_node = error_handling_node.coerce_to(
2645 PyrexTypes.c_char_ptr_type, self.current_env())
2646 elif error_handling_node.type.is_string:
2647 error_handling = None
2651 error_handling = 'strict'
2652 error_handling_node = null_node
2654 return (encoding, encoding_node, error_handling, error_handling_node)
2659 def _substitute_method_call(self, node, name, func_type,
2660 attr_name, is_unbound_method, args=(),
2662 may_return_none=ExprNodes.PythonCapiCallNode.may_return_none):
2664 if args and not args[0].is_literal:
2666 if is_unbound_method:
2667 self_arg = self_arg.as_none_safe_node(
2668 "descriptor '%s' requires a '%s' object but received a 'NoneType'" % (
2669 attr_name, node.function.obj.name))
2671 self_arg = self_arg.as_none_safe_node(
2672 "'NoneType' object has no attribute '%s'" % attr_name,
2673 error = "PyExc_AttributeError")
2675 return ExprNodes.PythonCapiCallNode(
2676 node.pos, name, func_type,
2678 is_temp = node.is_temp,
2679 utility_code = utility_code,
2680 may_return_none = may_return_none,
2683 def _inject_int_default_argument(self, node, args, arg_index, type, default_value):
2684 assert len(args) >= arg_index
2685 if len(args) == arg_index:
2686 args.append(ExprNodes.IntNode(node.pos, value=str(default_value),
2687 type=type, constant_result=default_value))
2689 args[arg_index] = args[arg_index].coerce_to(type, self.current_env())
2691 def _inject_bint_default_argument(self, node, args, arg_index, default_value):
2692 assert len(args) >= arg_index
2693 if len(args) == arg_index:
2694 default_value = bool(default_value)
2695 args.append(ExprNodes.BoolNode(node.pos, value=default_value,
2696 constant_result=default_value))
2698 args[arg_index] = args[arg_index].coerce_to_boolean(self.current_env())
2701 py_unicode_istitle_utility_code = UtilityCode(
2702 # Py_UNICODE_ISTITLE() doesn't match unicode.istitle() as the latter
2703 # additionally allows character that comply with Py_UNICODE_ISUPPER()
2705 static CYTHON_INLINE int __Pyx_Py_UNICODE_ISTITLE(Py_UNICODE uchar); /* proto */
2708 static CYTHON_INLINE int __Pyx_Py_UNICODE_ISTITLE(Py_UNICODE uchar) {
2709 return Py_UNICODE_ISTITLE(uchar) || Py_UNICODE_ISUPPER(uchar);
2713 unicode_tailmatch_utility_code = UtilityCode(
2714 # Python's unicode.startswith() and unicode.endswith() support a
2715 # tuple of prefixes/suffixes, whereas it's much more common to
2716 # test for a single unicode string.
2718 static int __Pyx_PyUnicode_Tailmatch(PyObject* s, PyObject* substr, \
2719 Py_ssize_t start, Py_ssize_t end, int direction);
2722 static int __Pyx_PyUnicode_Tailmatch(PyObject* s, PyObject* substr,
2723 Py_ssize_t start, Py_ssize_t end, int direction) {
2724 if (unlikely(PyTuple_Check(substr))) {
2727 for (i = 0; i < PyTuple_GET_SIZE(substr); i++) {
2728 result = PyUnicode_Tailmatch(s, PyTuple_GET_ITEM(substr, i),
2729 start, end, direction);
2736 return PyUnicode_Tailmatch(s, substr, start, end, direction);
2741 dict_getitem_default_utility_code = UtilityCode(
2743 static PyObject* __Pyx_PyDict_GetItemDefault(PyObject* d, PyObject* key, PyObject* default_value) {
2745 #if PY_MAJOR_VERSION >= 3
2746 value = PyDict_GetItemWithError(d, key);
2747 if (unlikely(!value)) {
2748 if (unlikely(PyErr_Occurred()))
2750 value = default_value;
2754 if (PyString_CheckExact(key) || PyUnicode_CheckExact(key) || PyInt_CheckExact(key)) {
2755 /* these presumably have safe hash functions */
2756 value = PyDict_GetItem(d, key);
2757 if (unlikely(!value)) {
2758 value = default_value;
2763 m = __Pyx_GetAttrString(d, "get");
2764 if (!m) return NULL;
2765 value = PyObject_CallFunctionObjArgs(m, key,
2766 (default_value == Py_None) ? NULL : default_value, NULL);
2776 append_utility_code = UtilityCode(
2778 static CYTHON_INLINE PyObject* __Pyx_PyObject_Append(PyObject* L, PyObject* x) {
2779 if (likely(PyList_CheckExact(L))) {
2780 if (PyList_Append(L, x) < 0) return NULL;
2782 return Py_None; /* this is just to have an accurate signature */
2786 m = __Pyx_GetAttrString(L, "append");
2787 if (!m) return NULL;
2788 r = PyObject_CallFunctionObjArgs(m, x, NULL);
2798 pop_utility_code = UtilityCode(
2800 static CYTHON_INLINE PyObject* __Pyx_PyObject_Pop(PyObject* L) {
2802 #if PY_VERSION_HEX >= 0x02040000
2803 if (likely(PyList_CheckExact(L))
2804 /* Check that both the size is positive and no reallocation shrinking needs to be done. */
2805 && likely(PyList_GET_SIZE(L) > (((PyListObject*)L)->allocated >> 1))) {
2807 return PyList_GET_ITEM(L, PyList_GET_SIZE(L));
2810 m = __Pyx_GetAttrString(L, "pop");
2811 if (!m) return NULL;
2812 r = PyObject_CallObject(m, NULL);
2820 pop_index_utility_code = UtilityCode(
2822 static PyObject* __Pyx_PyObject_PopIndex(PyObject* L, Py_ssize_t ix);
2825 static PyObject* __Pyx_PyObject_PopIndex(PyObject* L, Py_ssize_t ix) {
2826 PyObject *r, *m, *t, *py_ix;
2827 #if PY_VERSION_HEX >= 0x02040000
2828 if (likely(PyList_CheckExact(L))) {
2829 Py_ssize_t size = PyList_GET_SIZE(L);
2830 if (likely(size > (((PyListObject*)L)->allocated >> 1))) {
2834 if (likely(0 <= ix && ix < size)) {
2836 PyObject* v = PyList_GET_ITEM(L, ix);
2839 for(i=ix; i<size; i++) {
2840 PyList_SET_ITEM(L, i, PyList_GET_ITEM(L, i+1));
2848 m = __Pyx_GetAttrString(L, "pop");
2850 py_ix = PyInt_FromSsize_t(ix);
2851 if (!py_ix) goto bad;
2854 PyTuple_SET_ITEM(t, 0, py_ix);
2856 r = PyObject_CallObject(m, t);
2870 pyobject_as_double_utility_code = UtilityCode(
2872 static double __Pyx__PyObject_AsDouble(PyObject* obj); /* proto */
2874 #define __Pyx_PyObject_AsDouble(obj) \\
2875 ((likely(PyFloat_CheckExact(obj))) ? \\
2876 PyFloat_AS_DOUBLE(obj) : __Pyx__PyObject_AsDouble(obj))
2879 static double __Pyx__PyObject_AsDouble(PyObject* obj) {
2880 PyObject* float_value;
2881 if (Py_TYPE(obj)->tp_as_number && Py_TYPE(obj)->tp_as_number->nb_float) {
2882 return PyFloat_AsDouble(obj);
2883 } else if (PyUnicode_CheckExact(obj) || PyBytes_CheckExact(obj)) {
2884 #if PY_MAJOR_VERSION >= 3
2885 float_value = PyFloat_FromString(obj);
2887 float_value = PyFloat_FromString(obj, 0);
2890 PyObject* args = PyTuple_New(1);
2891 if (unlikely(!args)) goto bad;
2892 PyTuple_SET_ITEM(args, 0, obj);
2893 float_value = PyObject_Call((PyObject*)&PyFloat_Type, args, 0);
2894 PyTuple_SET_ITEM(args, 0, 0);
2897 if (likely(float_value)) {
2898 double value = PyFloat_AS_DOUBLE(float_value);
2899 Py_DECREF(float_value);
2909 bytes_index_utility_code = UtilityCode(
2911 static CYTHON_INLINE char __Pyx_PyBytes_GetItemInt(PyObject* unicode, Py_ssize_t index, int check_bounds); /* proto */
2914 static CYTHON_INLINE char __Pyx_PyBytes_GetItemInt(PyObject* bytes, Py_ssize_t index, int check_bounds) {
2916 if (unlikely(index >= PyBytes_GET_SIZE(bytes)) |
2917 ((index < 0) & unlikely(index < -PyBytes_GET_SIZE(bytes)))) {
2918 PyErr_Format(PyExc_IndexError, "string index out of range");
2923 index += PyBytes_GET_SIZE(bytes);
2924 return PyBytes_AS_STRING(bytes)[index];
2930 tpnew_utility_code = UtilityCode(
2932 static CYTHON_INLINE PyObject* __Pyx_tp_new(PyObject* type_obj) {
2933 return (PyObject*) (((PyTypeObject*)(type_obj))->tp_new(
2934 (PyTypeObject*)(type_obj), %(TUPLE)s, NULL));
2936 """ % {'TUPLE' : Naming.empty_tuple}
2940 class ConstantFolding(Visitor.VisitorTransform, SkipDeclarations):
2941 """Calculate the result of constant expressions to store it in
2942 ``expr_node.constant_result``, and replace trivial cases by their
2947 - We calculate float constants to make them available to the
2948 compiler, but we do not aggregate them into a single literal
2949 node to prevent any loss of precision.
2951 - We recursively calculate constants from non-literal nodes to
2952 make them available to the compiler, but we only aggregate
2953 literal nodes at each step. Non-literal nodes are never merged
2956 def _calculate_const(self, node):
2957 if node.constant_result is not ExprNodes.constant_value_not_set:
2960 # make sure we always set the value
2961 not_a_constant = ExprNodes.not_a_constant
2962 node.constant_result = not_a_constant
2964 # check if all children are constant
2965 children = self.visitchildren(node)
2966 for child_result in children.values():
2967 if type(child_result) is list:
2968 for child in child_result:
2969 if getattr(child, 'constant_result', not_a_constant) is not_a_constant:
2971 elif getattr(child_result, 'constant_result', not_a_constant) is not_a_constant:
2974 # now try to calculate the real constant value
2976 node.calculate_constant_result()
2977 # if node.constant_result is not ExprNodes.not_a_constant:
2978 # print node.__class__.__name__, node.constant_result
2979 except (ValueError, TypeError, KeyError, IndexError, AttributeError, ArithmeticError):
2980 # ignore all 'normal' errors here => no constant result
2983 # this looks like a real error
2984 import traceback, sys
2985 traceback.print_exc(file=sys.stdout)
2987 NODE_TYPE_ORDER = [ExprNodes.CharNode, ExprNodes.IntNode,
2988 ExprNodes.LongNode, ExprNodes.FloatNode]
2990 def _widest_node_class(self, *nodes):
2992 return self.NODE_TYPE_ORDER[
2993 max(map(self.NODE_TYPE_ORDER.index, map(type, nodes)))]
2997 def visit_ExprNode(self, node):
2998 self._calculate_const(node)
3001 def visit_UnopNode(self, node):
3002 self._calculate_const(node)
3003 if node.constant_result is ExprNodes.not_a_constant:
3005 if not node.operand.is_literal:
3007 if isinstance(node.operand, ExprNodes.BoolNode):
3008 return ExprNodes.IntNode(node.pos, value = str(node.constant_result),
3009 type = PyrexTypes.c_int_type,
3010 constant_result = node.constant_result)
3011 if node.operator == '+':
3012 return self._handle_UnaryPlusNode(node)
3013 elif node.operator == '-':
3014 return self._handle_UnaryMinusNode(node)
3017 def _handle_UnaryMinusNode(self, node):
3018 if isinstance(node.operand, ExprNodes.LongNode):
3019 return ExprNodes.LongNode(node.pos, value = '-' + node.operand.value,
3020 constant_result = node.constant_result)
3021 if isinstance(node.operand, ExprNodes.FloatNode):
3022 # this is a safe operation
3023 return ExprNodes.FloatNode(node.pos, value = '-' + node.operand.value,
3024 constant_result = node.constant_result)
3025 node_type = node.operand.type
3026 if node_type.is_int and node_type.signed or \
3027 isinstance(node.operand, ExprNodes.IntNode) and node_type.is_pyobject:
3028 return ExprNodes.IntNode(node.pos, value = '-' + node.operand.value,
3030 longness = node.operand.longness,
3031 constant_result = node.constant_result)
3034 def _handle_UnaryPlusNode(self, node):
3035 if node.constant_result == node.operand.constant_result:
3039 def visit_BoolBinopNode(self, node):
3040 self._calculate_const(node)
3041 if node.constant_result is ExprNodes.not_a_constant:
3043 if not node.operand1.is_literal or not node.operand2.is_literal:
3046 if node.constant_result == node.operand1.constant_result and node.operand1.is_literal:
3047 return node.operand1
3048 elif node.constant_result == node.operand2.constant_result and node.operand2.is_literal:
3049 return node.operand2
3051 # FIXME: we could do more ...
3054 def visit_BinopNode(self, node):
3055 self._calculate_const(node)
3056 if node.constant_result is ExprNodes.not_a_constant:
3058 if isinstance(node.constant_result, float):
3060 operand1, operand2 = node.operand1, node.operand2
3061 if not operand1.is_literal or not operand2.is_literal:
3064 # now inject a new constant node with the calculated value
3066 type1, type2 = operand1.type, operand2.type
3067 if type1 is None or type2 is None:
3069 except AttributeError:
3072 if type1.is_numeric and type2.is_numeric:
3073 widest_type = PyrexTypes.widest_numeric_type(type1, type2)
3075 widest_type = PyrexTypes.py_object_type
3076 target_class = self._widest_node_class(operand1, operand2)
3077 if target_class is None:
3079 elif target_class is ExprNodes.IntNode:
3080 unsigned = getattr(operand1, 'unsigned', '') and \
3081 getattr(operand2, 'unsigned', '')
3082 longness = "LL"[:max(len(getattr(operand1, 'longness', '')),
3083 len(getattr(operand2, 'longness', '')))]
3084 new_node = ExprNodes.IntNode(pos=node.pos,
3085 unsigned = unsigned, longness = longness,
3086 value = str(node.constant_result),
3087 constant_result = node.constant_result)
3088 # IntNode is smart about the type it chooses, so we just
3089 # make sure we were not smarter this time
3090 if widest_type.is_pyobject or new_node.type.is_pyobject:
3091 new_node.type = PyrexTypes.py_object_type
3093 new_node.type = PyrexTypes.widest_numeric_type(widest_type, new_node.type)
3095 if isinstance(node, ExprNodes.BoolNode):
3096 node_value = node.constant_result
3098 node_value = str(node.constant_result)
3099 new_node = target_class(pos=node.pos, type = widest_type,
3101 constant_result = node.constant_result)
3104 def visit_PrimaryCmpNode(self, node):
3105 self._calculate_const(node)
3106 if node.constant_result is ExprNodes.not_a_constant:
3108 bool_result = bool(node.constant_result)
3109 return ExprNodes.BoolNode(node.pos, value=bool_result,
3110 constant_result=bool_result)
3112 def visit_IfStatNode(self, node):
3113 self.visitchildren(node)
3114 # eliminate dead code based on constant condition results
3116 for if_clause in node.if_clauses:
3117 condition_result = if_clause.get_constant_condition_result()
3118 if condition_result is None:
3119 # unknown result => normal runtime evaluation
3120 if_clauses.append(if_clause)
3121 elif condition_result == True:
3122 # subsequent clauses can safely be dropped
3123 node.else_clause = if_clause.body
3126 assert condition_result == False
3128 return node.else_clause
3129 node.if_clauses = if_clauses
3132 # in the future, other nodes can have their own handler method here
3133 # that can replace them with a constant result node
3135 visit_Node = Visitor.VisitorTransform.recurse_to_children
3138 class FinalOptimizePhase(Visitor.CythonTransform):
3140 This visitor handles several commuting optimizations, and is run
3141 just before the C code generation phase.
3143 The optimizations currently implemented in this class are:
3144 - eliminate None assignment and refcounting for first assignment.
3145 - isinstance -> typecheck for cdef types
3146 - eliminate checks for None and/or types that became redundant after tree changes
3148 def visit_SingleAssignmentNode(self, node):
3149 """Avoid redundant initialisation of local variables before their
3152 self.visitchildren(node)
3155 lhs.lhs_of_first_assignment = True
3156 if isinstance(lhs, ExprNodes.NameNode) and lhs.entry.type.is_pyobject:
3157 # Have variable initialized to 0 rather than None
3158 lhs.entry.init_to_none = False
3162 def visit_SimpleCallNode(self, node):
3163 """Replace generic calls to isinstance(x, type) by a more efficient
3166 self.visitchildren(node)
3167 if node.function.type.is_cfunction and isinstance(node.function, ExprNodes.NameNode):
3168 if node.function.name == 'isinstance':
3169 type_arg = node.args[1]
3170 if type_arg.type.is_builtin_type and type_arg.type.name == 'type':
3171 from CythonScope import utility_scope
3172 node.function.entry = utility_scope.lookup('PyObject_TypeCheck')
3173 node.function.type = node.function.entry.type
3174 PyTypeObjectPtr = PyrexTypes.CPtrType(utility_scope.lookup('PyTypeObject').type)
3175 node.args[1] = ExprNodes.CastNode(node.args[1], PyTypeObjectPtr)
3178 def visit_PyTypeTestNode(self, node):
3179 """Remove tests for alternatively allowed None values from
3180 type tests when we know that the argument cannot be None
3183 self.visitchildren(node)
3184 if not node.notnone:
3185 if not node.arg.may_be_none():