From: Simon Marlow <simonmar@microsoft.com>
Date: Mon, 7 Apr 2008 21:24:37 +0000 (+0000)
Subject: update a comment
X-Git-Tag: 2008-05-28~393
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=d7fcc5eb8e926038240078ebfccea05f4f3eb1da

update a comment
---

diff --git a/includes/Cmm.h b/includes/Cmm.h
index d47e6fd..4cfb432 100644
--- a/includes/Cmm.h
+++ b/includes/Cmm.h
@@ -102,18 +102,8 @@
 #endif
 
 /*
- * The RTS must UNTAG a pointer before dereferencing it.
- * The use of UNTAG follows the following rules of thumb:
- *
- * - Any pointer might be tagged.
- * - Except the pointers that are passed in R1 to RTS functions.
- * - R1 is also untagged when entering constructor code.
- * 
- * TODO:
- *
- * - Remove redundancies of tagging and untagging in code generation.
- * - Optimize getTag or dataToTag# ?
- *
+ * The RTS must sometimes UNTAG a pointer before dereferencing it.
+ * See the wiki page Commentary/Rts/HaskellExecution/PointerTagging 
  */
 #define TAG_MASK ((1 << TAG_BITS) - 1)
 #define UNTAG(p) (p & ~TAG_MASK)