Add (a) CoreM monad, (b) new Annotations feature

This patch, written by Max Bolingbroke,  does two things

1.  It adds a new CoreM monad (defined in simplCore/CoreMonad),
    which is used as the top-level monad for all the Core-to-Core
    transformations (starting at SimplCore).  It supports
       * I/O (for debug printing)
       * Unique supply
       * Statistics gathering
       * Access to the HscEnv, RuleBase, Annotations, Module
    The patch therefore refactors the top "skin" of every Core-to-Core
    pass, but does not change their functionality.

2.  It adds a completely new facility to GHC: Core "annotations".
    The idea is that you can say
       {#- ANN foo (Just "Hello") #-}
    which adds the annotation (Just "Hello") to the top level function
    foo.  These annotations can be looked up in any Core-to-Core pass,
    and are persisted into interface files.  (Hence a Core-to-Core pass
    can also query the annotations of imported things.)  Furthermore,
    a Core-to-Core pass can add new annotations (eg strictness info)
    of its own, which can be queried by importing modules.

The design of the annotation system is somewhat in flux.  It's
designed to work with the (upcoming) dynamic plug-ins mechanism,
but is meanwhile independently useful.

Do not merge to 6.10!  

1 files changed, 3 insertions, 8 deletions

diff --git a/compiler/simplCore/SAT.lhs b/compiler/simplCore/SAT.lhs
index 329c95ca11..ca251568a7 100644
--- a/compiler/simplCore/SAT.lhs
+++ b/compiler/simplCore/SAT.lhs
@@ -52,10 +52,8 @@ essential to make this work well!
 
 module SAT ( doStaticArgs ) where
 
-import DynFlags
 import Var
 import CoreSyn
-import CoreLint
 import CoreUtils
 import Type
 import TcType
@@ -78,11 +76,8 @@ import FastString
 \end{code}
 
 \begin{code}
-doStaticArgs :: DynFlags -> UniqSupply -> [CoreBind] -> IO [CoreBind]
-doStaticArgs dflags us binds = do
-    showPass dflags "Static argument"
-    let binds' = snd $ mapAccumL sat_bind_threaded_us us binds
-    endPass dflags "Static argument" Opt_D_verbose_core2core binds'
+doStaticArgs :: UniqSupply -> [CoreBind] -> [CoreBind]
+doStaticArgs us binds = snd $ mapAccumL sat_bind_threaded_us us binds
   where
     sat_bind_threaded_us us bind =
         let (us1, us2) = splitUniqSupply us
@@ -428,4 +423,4 @@ isStaticValue :: Staticness App -> Bool
 isStaticValue (Static (VarApp _)) = True
 isStaticValue _                   = False
 
-\end{code}
\ No newline at end of file
+\end{code}