From: simonmar <unknown>
Date: Mon, 21 May 2001 14:05:04 +0000 (+0000)
Subject: [project @ 2001-05-21 14:05:04 by simonmar]
X-Git-Tag: Approximately_9120_patches~1914
X-Git-Url: http://git.megacz.com/?a=commitdiff_plain;h=19b30434646e33c499e480117994f7187084aef4;p=ghc-hetmet.git

[project @ 2001-05-21 14:05:04 by simonmar]
minor performance improvement
---

diff --git a/ghc/lib/std/PrelIO.hsc b/ghc/lib/std/PrelIO.hsc
index 0292fdf..4eeaad1 100644
--- a/ghc/lib/std/PrelIO.hsc
+++ b/ghc/lib/std/PrelIO.hsc
@@ -3,7 +3,7 @@
 #undef DEBUG_DUMP
 
 -- -----------------------------------------------------------------------------
--- $Id: PrelIO.hsc,v 1.1 2001/05/18 16:54:05 simonmar Exp $
+-- $Id: PrelIO.hsc,v 1.2 2001/05/21 14:05:04 simonmar Exp $
 --
 -- (c) The University of Glasgow, 1992-2001
 --
@@ -451,13 +451,13 @@ hPutStr handle str = do
 
 
 getSpareBuffer :: Handle__ -> IO (BufferMode, Buffer)
-getSpareBuffer handle_ = do
-   let mode = haBufferMode handle_
+getSpareBuffer Handle__{haBuffer=ref, 
+			haBuffers=spare_ref,
+			haBufferMode=mode}
+ = do
    case mode of
      NoBuffering -> return (mode, error "no buffer!")
      _ -> do
-	  let spare_ref = haBuffers handle_
-	      ref = haBuffer handle_
           bufs <- readIORef spare_ref
 	  buf  <- readIORef ref
 	  case bufs of