X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FnativeGen%2FRegAllocLinear.hs;h=888ef16c70e3b6248c0bdc4149838d5b8fcc3297;hb=97169c5dd31537b28f5f8ad08cd6cdf82c1ecefd;hp=968b3998bf6cd044f064615b2d7614d44d80e2a0;hpb=fd8d04119e849f9c713d3e697228846d93c5ca69;p=ghc-hetmet.git

diff --git a/compiler/nativeGen/RegAllocLinear.hs b/compiler/nativeGen/RegAllocLinear.hs
index 968b399..888ef16 100644
--- a/compiler/nativeGen/RegAllocLinear.hs
+++ b/compiler/nativeGen/RegAllocLinear.hs
@@ -1,3 +1,4 @@
+{-# OPTIONS -fno-warn-missing-signatures #-}
 -----------------------------------------------------------------------------
 --
 -- The register allocator
@@ -5,7 +6,6 @@
 -- (c) The University of Glasgow 2004
 --
 -----------------------------------------------------------------------------
-{-# OPTIONS -fno-warn-missing-signatures #-}
 
 {-
 The algorithm is roughly:
@@ -102,11 +102,9 @@ import UniqSupply
 import Outputable
 import State
 
-#ifndef DEBUG
-import Data.Maybe	( fromJust )
-#endif
-import Data.List	( nub, partition, foldl')
-import Control.Monad	( when )
+import Data.Maybe
+import Data.List
+import Control.Monad
 import Data.Word
 import Data.Bits
 
@@ -157,8 +155,9 @@ getFreeRegs :: RegClass -> FreeRegs -> [RegNo]	-- lazilly
 getFreeRegs cls (FreeRegs g f)
     | RcDouble <- cls = go f (0x80000000) 63
     | RcInteger <- cls = go g (0x80000000) 31
+    | otherwise = pprPanic "RegAllocLinear.getFreeRegs: Bad cls" (ppr cls)
     where
-        go x 0 i = []
+        go _ 0 _ = []
         go x m i | x .&. m /= 0 = i : (go x (m `shiftR` 1) $! i-1)
                  | otherwise    = go x (m `shiftR` 1) $! i-1
 
@@ -293,10 +292,8 @@ save it in a spill location, but mark it as InBoth because the current
 instruction might still want to read it.
 -}
 
-#ifdef DEBUG
 instance Outputable Loc where
   ppr l = text (show l)
-#endif
 
 
 -- | Do register allocation on some basic blocks.