tidying cmm/CmmLiveZ.hs

[ghc-hetmet.git] / compiler / cmm / CmmLiveZ.hs

diff --git a/compiler/cmm/CmmLiveZ.hs b/compiler/cmm/CmmLiveZ.hs
index 00a6491..9b2fa56 100644 (file)
--- a/compiler/cmm/CmmLiveZ.hs
+++ b/compiler/cmm/CmmLiveZ.hs
@@ -1,4 +1,4 @@
-{-# OPTIONS -Wall -fno-warn-name-shadowing #-}
+
 module CmmLiveZ
     ( CmmLive
     , cmmLivenessZ
@@ -11,13 +11,14 @@ import Cmm
 import CmmExpr
 import CmmTx
 import DFMonad
-import Maybes
 import PprCmm()
 import PprCmmZ()
-import UniqSet
 import ZipDataflow
 import ZipCfgCmmRep
 
+import Maybes
+import UniqSet
+
 -----------------------------------------------------------------------------
 -- Calculating what variables are live on entry to a basic block
 -----------------------------------------------------------------------------
@@ -40,10 +41,8 @@ type BlockEntryLiveness = BlockEnv CmmLive
 -----------------------------------------------------------------------------
 cmmLivenessZ :: CmmGraph -> BlockEntryLiveness
 cmmLivenessZ g = env
-    where env = runDFA liveLattice $
-                do run_b_anal transfer g
-                   allFacts
-          transfer = BComp "liveness analysis" exit last middle first
+    where env = runDFA liveLattice $ do { run_b_anal transfer g; allFacts }
+          transfer     = BComp "liveness analysis" exit last middle first
           exit         = emptyUniqSet
           first live _ = live
           middle       = flip middleLiveness
@@ -63,13 +62,13 @@ middleLiveness m = middle m
         middle (MidStore addr rval)          = gen addr . gen rval
         middle (MidUnsafeCall tgt ress args) = gen tgt . gen args . kill ress
         middle (CopyIn _ formals _)          = kill formals
-        middle (CopyOut _ formals)           = gen formals
+        middle (CopyOut _ actuals)           = gen actuals
 
 lastLiveness :: Last -> (BlockId -> CmmLive) -> CmmLive
 lastLiveness l env = last l
-  where last (LastReturn ress)       = gen ress emptyUniqSet
-        last (LastJump e args)       = gen e $ gen args emptyUniqSet
-        last (LastBranch id args)    = gen args $ env id
+  where last (LastReturn)            = emptyUniqSet
+        last (LastJump e)            = gen e $ emptyUniqSet
+        last (LastBranch id)         = env id
         last (LastCall tgt (Just k)) = gen tgt $ env k
         last (LastCall tgt Nothing)  = gen tgt $ emptyUniqSet
         last (LastCondBranch e t f)  = gen e $ unionUniqSets (env t) (env f)