From d1906558555d6a9c939fcf979135194833d5bdf2 Mon Sep 17 00:00:00 2001
From: Kaushik Kulkarni <kaushikcfd@gmail.com>
Date: Mon, 12 Aug 2019 05:54:23 +0530
Subject: [PATCH] adds check for validity of input inames

---
 loopy/transform/iname.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/loopy/transform/iname.py b/loopy/transform/iname.py
index 51de11191..fe322b9d3 100644
--- a/loopy/transform/iname.py
+++ b/loopy/transform/iname.py
@@ -1287,6 +1287,9 @@ def _split_reduction(kernel, inames, direction, within=None):
         inames = inames.split(",")
     inames = set(inames)
 
+    if not (inames <= kernel.all_inames()):
+        raise LoopyError("Unknown inames: {}.".format(inames-kernel.all_inames()))
+
     from loopy.match import parse_stack_match
     within = parse_stack_match(within)
 
-- 
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