More modules that need LANGUAGE BangPatterns

[ghc-hetmet.git] / compiler / ghci / ByteCodeLink.lhs

diff --git a/compiler/ghci/ByteCodeLink.lhs b/compiler/ghci/ByteCodeLink.lhs
index 54dff1d..b1f7e39 100644 (file)
--- a/compiler/ghci/ByteCodeLink.lhs
+++ b/compiler/ghci/ByteCodeLink.lhs
@@ -4,6 +4,7 @@
 ByteCodeLink: Bytecode assembler and linker
 
 \begin{code}
+{-# LANGUAGE BangPatterns #-}
 {-# OPTIONS -optc-DNON_POSIX_SOURCE #-}
 
 {-# OPTIONS -w #-}
@@ -50,6 +51,8 @@ import GHC.Arr                ( Array(..) )
 import GHC.IOBase      ( IO(..) )
 import GHC.Ptr         ( Ptr(..), castPtr )
 import GHC.Base                ( writeArray#, RealWorld, Int(..), Word# )  
+
+import Data.Word
 \end{code}
 
 
@@ -117,24 +120,31 @@ linkBCO' ie ce (UnlinkedBCO nm arity insns_barr bitmap literalsSS ptrsSS)
         let n_literals = sizeSS literalsSS
             n_ptrs     = sizeSS ptrsSS
 
-       ptrs_arr <- mkPtrsArray ie ce n_ptrs ptrs
+        ptrs_arr <- if n_ptrs > 65535
+                    then panic "linkBCO: >= 64k ptrs"
+                    else mkPtrsArray ie ce (fromIntegral n_ptrs) ptrs
 
         let 
-            ptrs_parr = case ptrs_arr of Array _lo _hi _n parr -> parr
+            !ptrs_parr = case ptrs_arr of Array _lo _hi _n parr -> parr
 
-            literals_arr = listArray (0, n_literals-1) linked_literals
-                           :: UArray Int Word
-            literals_barr = case literals_arr of UArray _lo _hi _n barr -> barr
+            litRange
+             | n_literals > 65535 = panic "linkBCO: >= 64k literals"
+             | n_literals > 0     = (0, fromIntegral n_literals - 1)
+             | otherwise          = (1, 0)
+            literals_arr :: UArray Word16 Word
+            literals_arr = listArray litRange linked_literals
+            !literals_barr = case literals_arr of UArray _lo _hi _n barr -> barr
 
-           (I# arity#)  = arity
+           !(I# arity#)  = arity
 
         newBCO insns_barr literals_barr ptrs_parr arity# bitmap
 
 
 -- we recursively link any sub-BCOs while making the ptrs array
-mkPtrsArray :: ItblEnv -> ClosureEnv -> Int -> [BCOPtr] -> IO (Array Int HValue)
+mkPtrsArray :: ItblEnv -> ClosureEnv -> Word16 -> [BCOPtr] -> IO (Array Word16 HValue)
 mkPtrsArray ie ce n_ptrs ptrs = do
-  marr <- newArray_ (0, n_ptrs-1)
+  let ptrRange = if n_ptrs > 0 then (0, n_ptrs-1) else (1, 0)
+  marr <- newArray_ ptrRange
   let 
     fill (BCOPtrName n)     i = do
        ptr <- lookupName ce n
@@ -165,7 +175,7 @@ instance MArray IOArray e IO where
     unsafeWrite (IOArray marr) i e = stToIO (unsafeWrite marr i e)
 
 -- XXX HACK: we should really have a new writeArray# primop that takes a BCO#.
-writeArrayBCO :: IOArray Int a -> Int -> BCO# -> IO ()
+writeArrayBCO :: IOArray Word16 a -> Int -> BCO# -> IO ()
 writeArrayBCO (IOArray (STArray _ _ _ marr#)) (I# i#) bco# = IO $ \s# ->
   case (unsafeCoerce# writeArray#) marr# i# bco# s# of { s# ->
   (# s#, () #) }
@@ -265,7 +275,7 @@ nameToCLabel n suffix
         else qual_name
   where
         pkgid = modulePackageId mod
-        mod = nameModule n
+        mod = ASSERT( isExternalName n ) nameModule n
         package_part = unpackFS (zEncodeFS (packageIdFS (modulePackageId mod)))
         module_part  = unpackFS (zEncodeFS (moduleNameFS (moduleName mod)))
         occ_part     = unpackFS (zEncodeFS (occNameFS (nameOccName n)))