X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FbasicTypes%2FUniqSupply.lhs;h=86cf320bf8516007a6c8130a8524b03270e92f4e;hb=b7cc3d012a98cc49abb3441e6637d5148f57f1d1;hp=218df9ee9034801e89d6b562b98978f6fa75ae07;hpb=b4775e5e760111e2d71fba3c44882dce390edfb2;p=ghc-hetmet.git

diff --git a/ghc/compiler/basicTypes/UniqSupply.lhs b/ghc/compiler/basicTypes/UniqSupply.lhs
index 218df9e..86cf320 100644
--- a/ghc/compiler/basicTypes/UniqSupply.lhs
+++ b/ghc/compiler/basicTypes/UniqSupply.lhs
@@ -24,12 +24,9 @@ module UniqSupply (
 #include "HsVersions.h"
 
 import Unique
-import GlaExts
 
-#if __GLASGOW_HASKELL__ < 301
-import IOBase		( IO(..), IOResult(..) )
-#else
-#endif
+import GLAEXTS
+import UNSAFE_IO	( unsafeInterleaveIO )
 
 w2i x = word2Int# x
 i2w x = int2Word# x
@@ -43,12 +40,6 @@ i2w_s x = (x :: Int#)
 %*									*
 %************************************************************************
 
-%************************************************************************
-%*									*
-\subsubsection[UniqSupply-type]{@UniqSupply@ type and operations}
-%*									*
-%************************************************************************
-
 A value of type @UniqSupply@ is unique, and it can
 supply {\em one} distinct @Unique@.  Also, from the supply, one can
 also manufacture an arbitrary number of further @UniqueSupplies@,
@@ -72,8 +63,11 @@ uniqsFromSupply :: UniqSupply -> [Unique]	-- Infinite
 \begin{code}
 mkSplitUniqSupply (C# c#)
   = let
+#if __GLASGOW_HASKELL__ >= 503
+	mask# = (i2w (ord# c#)) `uncheckedShiftL#` (i2w_s 24#)
+#else
 	mask# = (i2w (ord# c#)) `shiftL#` (i2w_s 24#)
-
+#endif
 	-- here comes THE MAGIC:
 
 	-- This is one of the most hammered bits in the whole compiler