X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FcodeGen%2FStgCmmBind.hs;h=64d3ef1794fa62abe1a59bb4599409c34d37c3c1;hp=e4960fc9cb171c043314449c50a2ca45d6400eef;hb=703ca1542c8e0983cc9d8eebce6e9f3dd3fd71e2;hpb=df54e4b621b1d2a8e30b01b3e93494a515d09f48

diff --git a/compiler/codeGen/StgCmmBind.hs b/compiler/codeGen/StgCmmBind.hs
index e4960fc..64d3ef1 100644
--- a/compiler/codeGen/StgCmmBind.hs
+++ b/compiler/codeGen/StgCmmBind.hs
@@ -17,7 +17,6 @@ module StgCmmBind (
 
 import StgCmmExpr
 import StgCmmMonad
-import StgCmmExpr
 import StgCmmEnv
 import StgCmmCon
 import StgCmmHeap
@@ -48,8 +47,6 @@ import Outputable
 import FastString
 import Maybes
 
-import Data.List
-
 ------------------------------------------------------------------------
 --		Top-level bindings
 ------------------------------------------------------------------------
@@ -87,8 +84,7 @@ cgTopRhsClosure id ccs _ upd_flag srt args body = do
   ; forkClosureBody (closureCodeBody True id closure_info ccs
                                      (nonVoidIds args) (length args) body fv_details)
 
-  ; pprTrace "arity for" (ppr id <+> ppr (length args) <+> ppr args) $
-    returnFC cg_id_info }
+  ; returnFC cg_id_info }
 
 ------------------------------------------------------------------------
 --		Non-top-level bindings
@@ -154,8 +150,7 @@ cgRhs name (StgRhsCon maybe_cc con args)
   = buildDynCon name maybe_cc con args
 
 cgRhs name (StgRhsClosure cc bi fvs upd_flag srt args body)
-  = pprTrace "cgRhs closure" (ppr name <+> ppr args) $
-    mkRhsClosure name cc bi (nonVoidIds fvs) upd_flag srt args body
+  = mkRhsClosure name cc bi (nonVoidIds fvs) upd_flag srt args body
 
 ------------------------------------------------------------------------
 --		Non-constructor right hand sides
@@ -396,21 +391,22 @@ closureCodeBody top_lvl bndr cl_info cc args arity body fv_details
 
 	-- Emit the main entry code
         ; emitClosureProcAndInfoTable top_lvl bndr cl_info args $ \(node, arg_regs) -> do
-    	        -- Emit the slow-entry code (for entering a closure through a PAP)
-	        { mkSlowEntryCode cl_info arg_regs
-
-		; let lf_info = closureLFInfo cl_info
-		      node_points = nodeMustPointToIt lf_info
-		; tickyEnterFun cl_info
-		; whenC node_points (ldvEnterClosure cl_info)
-		; granYield arg_regs node_points
-
-			-- Main payload
-		; entryHeapCheck node arity arg_regs $ do
-		{ enterCostCentre cl_info cc body
+                    -- Emit the slow-entry code (for entering a closure through a PAP)
+                { mkSlowEntryCode cl_info arg_regs
+
+                ; let lf_info = closureLFInfo cl_info
+                      node_points = nodeMustPointToIt lf_info
+                ; tickyEnterFun cl_info
+                ; whenC node_points (ldvEnterClosure cl_info)
+                ; granYield arg_regs node_points
+
+                        -- Main payload
+                ; entryHeapCheck (if node_points then Just node else Nothing) arity arg_regs $ do
+                { enterCostCentre cl_info cc body
                 ; fv_bindings <- mapM bind_fv fv_details
-		; load_fvs node lf_info fv_bindings -- Load free vars out of closure *after*
-		; cgExpr body }}	    -- heap check, to reduce live vars over check
+                -- Load free vars out of closure *after*
+                ; if node_points then load_fvs node lf_info fv_bindings else return ()
+                ; cgExpr body }}	    -- heap check, to reduce live vars over check
 
   }
 
@@ -421,7 +417,7 @@ bind_fv (id, off) = do { reg <- rebindToReg id; return (reg, off) }
 
 load_fvs :: LocalReg -> LambdaFormInfo -> [(LocalReg, WordOff)] -> FCode ()
 load_fvs node lf_info = mapCs (\ (reg, off) ->
-      pprTrace "get tag for" (ppr reg <+> ppr tag) $ emit $ mkTaggedObjectLoad reg node off tag)
+      emit $ mkTaggedObjectLoad reg node off tag)
   where tag = lfDynTag lf_info
 
 -----------------------------------------
@@ -461,10 +457,11 @@ thunkCode cl_info fv_details cc node arity body
 	; granThunk node_points
 
         -- Heap overflow check
-	; entryHeapCheck node arity [] $ do
+	; entryHeapCheck (if node_points then Just node else Nothing) arity [] $ do
       	{	-- Overwrite with black hole if necessary
 		-- but *after* the heap-overflow check
-	  whenC (blackHoleOnEntry cl_info && node_points)
+	  dflags <- getDynFlags
+	; whenC (blackHoleOnEntry dflags cl_info && node_points)
  	        (blackHoleIt cl_info)
 
 		-- Push update frame