X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fcmm%2FCmmZipUtil.hs;h=6a343f836f354e51e283fab57c58212b5aa33ed8;hb=33770e2e376005ff14a1d16b89f32b0d474425e2;hp=f9705478228d4ba10ce8db847ef1edf4ba7b2aa2;hpb=742809424904edbefc39dca8233356b25e546b56;p=ghc-hetmet.git

diff --git a/compiler/cmm/CmmZipUtil.hs b/compiler/cmm/CmmZipUtil.hs
index f970547..6a343f8 100644
--- a/compiler/cmm/CmmZipUtil.hs
+++ b/compiler/cmm/CmmZipUtil.hs
@@ -4,13 +4,14 @@ module CmmZipUtil
   , givesUniquePredecessorTo
   )
 where
+import BlockId
 import Prelude hiding (last, unzip)
 import ZipCfg
 
 import Maybes
 import UniqSet
 
--- | Compute the predecessors of each *reachable* block
+-- | Compute the predecessors of each /reachable/ block
 zipPreds :: LastNode l => LGraph m l -> BlockEnv BlockSet
 zipPreds g = foldl add emptyBlockEnv (postorder_dfs g)
     where add env block@(Block id _) =
@@ -24,7 +25,7 @@ zipPreds g = foldl add emptyBlockEnv (postorder_dfs g)
 
 givesUniquePredecessorTo :: LastNode l => LGraph m l -> BlockId -> Bool
 givesUniquePredecessorTo g = \id -> elemBlockSet id singlePreds
-    -- | accumulates a pair of sets: the set of all blocks containing a single 
+    -- accumulates a pair of sets: the set of all blocks containing a single
     -- predecessor, and the set of all blocks containing at least two predecessors
     where (singlePreds, _) = fold_blocks add (emptyBlockSet, emptyBlockSet) g
           add b (single, multi) = foldl add_pred (single, multi) (succs b)