Remove use of TempNode from ForInStatNode to simplify temp flow slightly

Cython/Compiler/ExprNodes.py

@@ -1324,6 +1324,10 @@ class ImportNode(ExprNode):
 
 class IteratorNode(ExprNode):
     #  Used as part of for statement implementation.
+    #
+    #  allocate_counter_temp/release_counter_temp needs to be called
+    #  by parent (ForInStatNode)
+    #
     #  Implements result = iter(sequence)
     #
     #  sequence   ExprNode
@@ -1337,14 +1341,17 @@ class IteratorNode(ExprNode):
         self.gil_check(env)
         self.is_temp = 1
 
-        self.counter = TempNode(self.pos, PyrexTypes.c_py_ssize_t_type, env)
-        self.counter.allocate_temp(env)
-
     gil_message = "Iterating over Python object"
 
     def release_temp(self, env):
         env.release_temp(self.result())
-        self.counter.release_temp(env)
+
+    def allocate_counter_temp(self, code):
+        self.counter_cname = code.funcstate.allocate_temp(
+            PyrexTypes.c_py_ssize_t_type, manage_ref=False)
+
+    def release_counter_temp(self, code):
+        code.funcstate.release_temp(self.counter_cname)
 
     def generate_result_code(self, code):
         is_builtin_sequence = self.sequence.type is list_type or \
@@ -1359,7 +1366,7 @@ class IteratorNode(ExprNode):
                     self.sequence.py_result()))
         code.putln(
             "%s = 0; %s = %s; Py_INCREF(%s);" % (
-                self.counter.result(),
+                self.counter_cname,
                 self.result(),
                 self.sequence.py_result(),
                 self.result()))
@@ -1370,7 +1377,7 @@ class IteratorNode(ExprNode):
                 code.error_goto(self.pos))
         else:
             code.putln("%s = -1; %s = PyObject_GetIter(%s); %s" % (
-                    self.counter.result(),
+                    self.counter_cname,
                     self.result(),
                     self.sequence.py_result(),
                     code.error_goto_if_null(self.result(), self.pos)))
@@ -1406,7 +1413,7 @@ class NextNode(AtomicExprNode):
                         prefix, self.iterator.py_result()))
             code.putln(
                 "if (%s >= Py%s_GET_SIZE(%s)) break;" % (
-                    self.iterator.counter.result(),
+                    self.iterator.counter_cname,
                     prefix,
                     self.iterator.py_result()))
             code.putln(
@@ -1414,9 +1421,9 @@ class NextNode(AtomicExprNode):
                     self.result(),
                     prefix,
                     self.iterator.py_result(),
-                    self.iterator.counter.result(),
+                    self.iterator.counter_cname,
                     self.result(),
-                    self.iterator.counter.result()))
+                    self.iterator.counter_cname))
             if len(type_checks) > 1:
                 code.put("} else ")
         if len(type_checks) == 1:

Cython/Compiler/Nodes.py

@@ -3737,6 +3737,7 @@ class ForInStatNode(LoopNode, StatNode):
 
     def generate_execution_code(self, code):
         old_loop_labels = code.new_loop_labels()
+        self.iterator.allocate_counter_temp(code)
         self.iterator.generate_evaluation_code(code)
         code.putln(
             "for (;;) {")
@@ -3753,6 +3754,7 @@ class ForInStatNode(LoopNode, StatNode):
             self.else_clause.generate_execution_code(code)
             code.putln("}")
         code.put_label(break_label)
+        self.iterator.release_counter_temp(code)
         self.iterator.generate_disposal_code(code)
 
     def annotate(self, code):