[commit: ghc] master: add note about branchChainElim (a61db80)

[Simon Marlow]

Repository : ssh://darcs.haskell.org//srv/darcs/ghc

On branch  : master

http://hackage.haskell.org/trac/ghc/changeset/a61db80b86321474d819c9e43cd5066d39d465b9

>---------------------------------------------------------------

commit a61db80b86321474d819c9e43cd5066d39d465b9
Author: Simon Marlow <marlowsd at gmail.com>
Date:   Tue Aug 23 16:06:40 2011 +0100

    add note about branchChainElim

>---------------------------------------------------------------

 compiler/cmm/cmm-notes |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/compiler/cmm/cmm-notes b/compiler/cmm/cmm-notes
index e9a6a60..81882c8 100644
--- a/compiler/cmm/cmm-notes
+++ b/compiler/cmm/cmm-notes
@@ -17,6 +17,10 @@ Things we did
 
 More notes (June 11)
 ~~~~~~~~~~~~~~~~~~~~
+
+* In CmmContFlowOpts.branchChainElim, can a single block be the
+  successor of two calls?
+
 * Check in ClosureInfo:
      -- NB: Results here should line up with the results of SMRep.rtsClosureType