Disable predefined name analysis (if stmts) for all non-analysis tasks

It's really buggy and caused quite a few issues

jedi/evaluate/__init__.py

@@ -135,7 +135,11 @@ class Evaluator(object):
                 if_stmt = None
                 break
         predefined_if_name_dict = context.predefined_names.get(if_stmt)
-        if predefined_if_name_dict is None and if_stmt and if_stmt.type == 'if_stmt':
+        # TODO there's a lot of issues with this one. We actually should do
+        # this in a different way. Caching should only be active in certain
+        # cases and this all sucks.
+        if predefined_if_name_dict is None and if_stmt \
+                and if_stmt.type == 'if_stmt' and self.is_analysis:
             if_stmt_test = if_stmt.children[1]
             name_dicts = [{}]
             # If we already did a check, we don't want to do it again -> If

jedi/evaluate/filters.py

@@ -212,7 +212,10 @@ class ParserTreeFilter(AbstractUsedNamesFilter):
     def _check_flows(self, names):
         for name in sorted(names, key=lambda name: name.start_pos, reverse=True):
             check = flow_analysis.reachability_check(
-                self._node_context, self._parser_scope, name, self._origin_scope
+                context=self._node_context,
+                context_scope=self._parser_scope,
+                node=name,
+                origin_scope=self._origin_scope
             )
             if check is not flow_analysis.UNREACHABLE:
                 yield name

jedi/evaluate/finder.py

@@ -56,7 +56,10 @@ class NameFinder(object):
         names = self.filter_name(filters)
         if self._found_predefined_types is not None and names:
             check = flow_analysis.reachability_check(
-                self._context, self._context.tree_node, self._name)
+                context=self._context,
+                context_scope=self._context.tree_node,
+                node=self._name,
+            )
             if check is flow_analysis.UNREACHABLE:
                 return ContextSet()
             return self._found_predefined_types
@@ -102,8 +105,7 @@ class NameFinder(object):
         ``filters``), until a name fits.
         """
         names = []
-        if self._context.predefined_names:
-            # TODO is this ok? node might not always be a tree.Name
+        if self._context.predefined_names and isinstance(self._name, tree.Name):
             node = self._name
             while node is not None and not is_scope(node):
                 node = node.parent

test/completion/stdlib.py

@@ -65,6 +65,10 @@ class X(): pass
 #? type
 type(X)
 
+if os.path.isfile():
+    #? ['abspath']
+    fails = os.path.abspath
+
 
 with open('foo') as f:
     for line in f.readlines():

test/static_analysis/branches.py

@@ -31,6 +31,12 @@ else:
     #! 6 type-error-operation
     z = x + y
 
+
+# TODO enable this one.
+#x = 3
+#if x != 1:
+#    x.upper()
+
 # -----------------
 # With a function
 # -----------------