1 files changed, 15 insertions, 0 deletions
diff --git a/testsuite/tests/codeGen/should_compile/T14626.hs b/testsuite/tests/codeGen/should_compile/T14626.hs
new file mode 100644
index 0000000000..a665694bfc
--- /dev/null
+++ b/testsuite/tests/codeGen/should_compile/T14626.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE MagicHash #-}
+
+module T14626 where
+
+import GHC.Prim
+
+data T = MkT !Bool
+
+f v = case v of
+         MkT y -> dataToTag# y
+
+-- This should /not/ produce an inner case on the y, thus:
+--    f v = case v of
+--            MkT y -> case y of z -> dataToTag# z
+-- But it was!  See Trac #14626 comment:4