X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fincludes%2FStgMacros.h;h=4a5a985fef50a5dd9ab9c9f64209aa9ab56be581;hb=6b4abadb6b860d53ed20d795cd2274bd7fc275f8;hp=2aecd4593a5b042a1b53ec7ca89cdfb4feb820e4;hpb=a5fb24aa07bf961023a79b1e947e223d91becd2f;p=ghc-hetmet.git

diff --git a/ghc/includes/StgMacros.h b/ghc/includes/StgMacros.h
index 2aecd45..4a5a985 100644
--- a/ghc/includes/StgMacros.h
+++ b/ghc/includes/StgMacros.h
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: StgMacros.h,v 1.53 2003/04/28 10:02:15 simonmar Exp $
+ * $Id: StgMacros.h,v 1.56 2003/08/05 14:01:34 simonpj Exp $
  *
  * (c) The GHC Team, 1998-1999
  *
@@ -445,6 +445,14 @@ EXTFUN_RTS(stg_gen_block);
 #   else
 // An object is replaced by a blackhole, so we fill the slop with zeros.
 // 
+// This looks like it can't work - we're overwriting the contents of
+// the THUNK with slop!  Perhaps this never worked??? --SDM
+// The problem is that with eager-black-holing we currently perform
+// the black-holing operation at the *beginning* of the basic block,
+// when we still need the contents of the thunk.
+// Perhaps the thing to do is to overwrite it at the *end* of the
+// basic block, when we've already sucked out the thunk's contents? -- SLPJ
+//
 // Todo: maybe use SET_HDR() and remove LDV_recordCreate()?
 // 
 #    define UPD_BH_UPDATABLE(info)		\
@@ -464,8 +472,6 @@ EXTFUN_RTS(stg_gen_block);
 #  define UPD_BH_SINGLE_ENTRY(thunk) /* nothing */
 #endif /* EAGER_BLACKHOLING */
 
-#define UPD_FRAME_UPDATEE(p)  ((P_)(((StgUpdateFrame *)(p))->updatee))
-
 /* -----------------------------------------------------------------------------
    Moving Floats and Doubles