From 38ee192c0de04821e9d3ef24c3b7150069c59538 Mon Sep 17 00:00:00 2001
From: Andreas Kloeckner <inform@tiker.net>
Date: Sun, 28 Jul 2013 16:04:44 -0400
Subject: [PATCH] Make instructions created from CSEs inherit parent's
 predicates

---
 loopy/kernel/creation.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/loopy/kernel/creation.py b/loopy/kernel/creation.py
index d0a71dae6..8a25404a5 100644
--- a/loopy/kernel/creation.py
+++ b/loopy/kernel/creation.py
@@ -626,12 +626,13 @@ def expand_cses(knl):
                 shape=())
 
         from pymbolic.primitives import Variable
-        insn = ExpressionInstruction(
+        new_insn = ExpressionInstruction(
                 id=knl.make_unique_instruction_id(
                     extra_used_ids=newly_created_insn_ids),
-                assignee=Variable(new_var_name), expression=expr)
-        newly_created_insn_ids.add(insn.id)
-        new_insns.append(insn)
+                assignee=Variable(new_var_name), expression=expr,
+                predicates=insn.predicates)
+        newly_created_insn_ids.add(new_insn.id)
+        new_insns.append(new_insn)
 
         return new_var_name
 
-- 
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