Use GHC.Exts rather than GHC.Prim

compiler/cmm/OptimizationFuel.hs

@@ -11,7 +11,7 @@ module OptimizationFuel
     )
 where
 
-import GHC.Prim
+import GHC.Exts (State#)
 import Panic
 
 import Data.IORef

compiler/ghci/ByteCodeInstr.lhs

@@ -37,7 +37,7 @@ import SMRep
 import GHC.Ptr
 
 import Module (Module)
-import GHC.Prim
+import GHC.Exts
 
 
 -- ----------------------------------------------------------------------------

compiler/ghci/ByteCodeItbls.lhs

@@ -38,7 +38,6 @@ import Data.Bits	( Bits(..), shiftR )
 
 import GHC.Exts		( Int(I#), addr2Int# )
 import GHC.Ptr		( Ptr(..) )
-import GHC.Prim
 
 import Debug.Trace
 import Text.Printf

compiler/main/BreakArray.hs

@@ -26,7 +26,6 @@ module BreakArray
 
 import GHC.Exts
 import GHC.IOBase
-import GHC.Prim
 import GHC.Word
 import Constants