diff --git a/loopy/kernel/data.py b/loopy/kernel/data.py
index 44cbdea49456904bb61cd93bbe5febbb35bee074..96933f57a003aaca58ed00d2d73c3301b0c448c7 100644
--- a/loopy/kernel/data.py
+++ b/loopy/kernel/data.py
@@ -534,6 +534,8 @@ class TemporaryVariable(ArrayBase):
         self.update_persistent_hash_for_shape(key_hash, key_builder,
                 self.storage_shape)
         key_builder.rec(key_hash, self.base_indices)
+        key_builder.rec(key_hash, self.scope)
+        key_builder.rec(key_hash, self.base_storage)
 
         initializer = self.initializer
         if initializer is not None:
@@ -541,10 +543,22 @@ class TemporaryVariable(ArrayBase):
         key_builder.rec(key_hash, initializer)
 
         key_builder.rec(key_hash, self.read_only)
+        key_builder.rec(key_hash, self._base_storage_access_may_be_aliasing)
 
 # }}}
 
 
+def iname_tag_to_temp_var_scope(iname_tag):
+    iname_tag = parse_tag(iname_tag)
+
+    if isinstance(iname_tag, GroupIndexTag):
+        return temp_var_scope.GLOBAL
+    elif isinstance(iname_tag, LocalIndexTag):
+        return temp_var_scope.LOCAL
+    else:
+        return temp_var_scope.PRIVATE
+
+
 # {{{ substitution rule
 
 class SubstitutionRule(ImmutableRecord):
diff --git a/loopy/version.py b/loopy/version.py
index ff92ae26d4c697f6b7b320ef0ea203e5386479b2..5e07e979f2d44684be00290328244496176337b3 100644
--- a/loopy/version.py
+++ b/loopy/version.py
@@ -32,4 +32,4 @@ except ImportError:
 else:
     _islpy_version = islpy.version.VERSION_TEXT
 
-DATA_MODEL_VERSION = "v67-islpy%s" % _islpy_version
+DATA_MODEL_VERSION = "v68-islpy%s" % _islpy_version