Add {-# OPTIONS_GHC -w #-} and some blurb to all compiler modules

[ghc-hetmet.git] / compiler / cmm / PprC.hs

diff --git a/compiler/cmm/PprC.hs b/compiler/cmm/PprC.hs
index bda191c..7127be3 100644 (file)
--- a/compiler/cmm/PprC.hs
+++ b/compiler/cmm/PprC.hs
@@ -16,6 +16,13 @@
 
 -- ToDo: save/restore volatile registers around calls.
 
+{-# OPTIONS_GHC -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+--     http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
+-- for details
+
 module PprC (
         writeCs,
         pprStringInCStyle 
@@ -28,6 +35,7 @@ import Cmm
 import CLabel
 import MachOp
 import ForeignCall
+import ClosureInfo
 
 -- Utils
 import DynFlags
@@ -65,7 +73,7 @@ import StaticFlags    ( opt_Unregisterised )
 -- --------------------------------------------------------------------------
 -- Top level
 
-pprCs :: DynFlags -> [Cmm] -> SDoc
+pprCs :: DynFlags -> [RawCmm] -> SDoc
 pprCs dflags cmms
  = pprCode CStyle (vcat $ map (\c -> split_marker $$ pprC c) cmms)
  where
@@ -73,7 +81,7 @@ pprCs dflags cmms
      | dopt Opt_SplitObjs dflags = ptext SLIT("__STG_SPLIT_MARKER")
      | otherwise                = empty
 
-writeCs :: DynFlags -> Handle -> [Cmm] -> IO ()
+writeCs :: DynFlags -> Handle -> [RawCmm] -> IO ()
 writeCs dflags handle cmms 
   = printForC handle (pprCs dflags cmms)
 
@@ -83,13 +91,13 @@ writeCs dflags handle cmms
 -- for fun, we could call cmmToCmm over the tops...
 --
 
-pprC :: Cmm -> SDoc
+pprC :: RawCmm -> SDoc
 pprC (Cmm tops) = vcat $ intersperse (text "") $ map pprTop tops
 
 --
 -- top level procs
 -- 
-pprTop :: CmmTop -> SDoc
+pprTop :: RawCmmTop -> SDoc
 pprTop (CmmProc info clbl _params blocks) =
     (if not (null info)
         then pprDataExterns info $$
@@ -198,11 +206,11 @@ pprStmt stmt = case stmt of
        where
          rep = cmmExprRep src
 
-    CmmCall (CmmForeignCall fn cconv) results args ->
+    CmmCall (CmmCallee fn cconv) results args safety _ret ->
        -- Controversial: leave this out for now.
        -- pprUndef fn $$
 
-       pprCall ppr_fn cconv results args
+       pprCall ppr_fn cconv results args safety
        where
        ppr_fn = case fn of
                   CmmLit (CmmLabel lbl) -> pprCLabel lbl
@@ -219,8 +227,8 @@ pprStmt stmt = case stmt of
           ptext SLIT("#undef") <+> pprCLabel lbl
        pprUndef _ = empty
 
-    CmmCall (CmmPrim op) results args ->
-       pprCall ppr_fn CCallConv results args
+    CmmCall (CmmPrim op) results args safety _ret ->
+       pprCall ppr_fn CCallConv results args safety
        where
        ppr_fn = pprCallishMachOp_for_C op
 
@@ -321,8 +329,9 @@ pprExpr e = case e of
        -> char '*' <> pprAsPtrReg r
 
     CmmLoad (CmmRegOff r off) rep
-       | isPtrReg r && rep == wordRep 
+       | isPtrReg r && rep == wordRep && (off `rem` wORD_SIZE == 0)
        -- ToDo: check that the offset is a word multiple?
+        --       (For tagging to work, I had to avoid unaligned loads. --ARY)
        -> pprAsPtrReg r <> brackets (ppr (off `shiftR` wordShift))
 
     CmmLoad expr rep ->
@@ -631,12 +640,12 @@ pprAssign r1 (CmmRegOff r2 off)
 -- We can't cast the lvalue, so we have to cast the rhs if necessary.  Casting
 -- the lvalue elicits a warning from new GCC versions (3.4+).
 pprAssign r1 r2
-  | isFixedPtrReg r1
-  = pprReg r1 <> ptext SLIT(" = ") <> mkP_ <> pprExpr1 r2 <> semi
-  | Just ty <- strangeRegType r1
-  = pprReg r1 <> ptext SLIT(" = ") <> parens ty <> pprExpr1 r2 <> semi
-  | otherwise
-  = pprReg r1 <> ptext SLIT(" = ") <> pprExpr r2 <> semi
+  | isFixedPtrReg r1             = mkAssign (mkP_ <> pprExpr1 r2)
+  | Just ty <- strangeRegType r1 = mkAssign (parens ty <> pprExpr1 r2)
+  | otherwise                    = mkAssign (pprExpr r2)
+    where mkAssign x = if r1 == CmmGlobal BaseReg
+                       then ptext SLIT("ASSIGN_BaseReg") <> parens x <> semi
+                       else pprReg r1 <> ptext SLIT(" = ") <> x <> semi
 
 -- ---------------------------------------------------------------------
 -- Registers
@@ -718,10 +727,10 @@ pprLocalReg (LocalReg uniq _ _) = char '_' <> ppr uniq
 -- -----------------------------------------------------------------------------
 -- Foreign Calls
 
-pprCall :: SDoc -> CCallConv -> CmmHintFormals -> CmmActuals
+pprCall :: SDoc -> CCallConv -> CmmHintFormals -> CmmActuals -> CmmSafety
        -> SDoc
 
-pprCall ppr_fn cconv results args
+pprCall ppr_fn cconv results args _
   | not (is_cish cconv)
   = panic "pprCall: unknown calling convention"
 
@@ -793,12 +802,8 @@ pprExternDecl in_srt lbl
   | not (needsCDecl lbl) = empty
   | otherwise              = 
        hcat [ visibility, label_type (labelType lbl), 
-              lparen, dyn_wrapper (pprCLabel lbl), text ");" ]
+              lparen, pprCLabel lbl, text ");" ]
  where
-  dyn_wrapper d
-    | in_srt && labelDynamic lbl = text "DLL_IMPORT_DATA_VAR" <> parens d
-    | otherwise                         = d
-
   label_type CodeLabel = ptext SLIT("F_")
   label_type DataLabel = ptext SLIT("I_")
 
@@ -839,7 +844,7 @@ te_Lit _ = return ()
 te_Stmt :: CmmStmt -> TE ()
 te_Stmt (CmmAssign r e)                = te_Reg r >> te_Expr e
 te_Stmt (CmmStore l r)         = te_Expr l >> te_Expr r
-te_Stmt (CmmCall _ rs es)      = mapM_ (te_temp.fst) rs >>
+te_Stmt (CmmCall _ rs es _ _)  = mapM_ (te_temp.fst) rs >>
                                  mapM_ (te_Expr.fst) es
 te_Stmt (CmmCondBranch e _)    = te_Expr e
 te_Stmt (CmmSwitch e _)                = te_Expr e