X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FbasicTypes%2FUniqSupply.lhs;h=8e3ac96ae540a40317b21584d2618ceb51e45f93;hb=f3ebc8951ad495a5a027f1f482b45648dfe11c58;hp=8dcf595da004124b75fbee654b2b0da9c2aede9a;hpb=3a42f21026077b8b497852ff53288818a28883d2;p=ghc-hetmet.git

diff --git a/compiler/basicTypes/UniqSupply.lhs b/compiler/basicTypes/UniqSupply.lhs
index 8dcf595..8e3ac96 100644
--- a/compiler/basicTypes/UniqSupply.lhs
+++ b/compiler/basicTypes/UniqSupply.lhs
@@ -28,6 +28,13 @@ import Unique
 import GHC.Exts
 import System.IO.Unsafe	( unsafeInterleaveIO )
 
+#if __GLASGOW_HASKELL__ >= 607
+import GHC.IOBase (unsafeDupableInterleaveIO)
+#else
+unsafeDupableInterleaveIO :: IO a -> IO a
+unsafeDupableInterleaveIO = unsafeInterleaveIO
+#endif
+
 w2i x = word2Int# x
 i2w x = int2Word# x
 i2w_s x = (x :: Int#)
@@ -69,7 +76,7 @@ mkSplitUniqSupply (C# c#)
 
 	-- This is one of the most hammered bits in the whole compiler
 	mk_supply#
-	  = unsafeInterleaveIO (
+	  = unsafeDupableInterleaveIO (
 		genSymZh    >>= \ (I# u#) ->
 		mk_supply#  >>= \ s1 ->
 		mk_supply#  >>= \ s2 ->