X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FstgSyn%2FStgSyn.lhs;h=6cd7df78a5f32b1c606b0a2954fdfd309ecf777e;hb=235edf36cc202bb21c00d0e5e05ebf076fb0542e;hp=f1c50cc8fd017d2a8e67dc56e4fafdaa99b36af1;hpb=0065d5ab628975892cea1ec7303f968c3338cbe1;p=ghc-hetmet.git

diff --git a/compiler/stgSyn/StgSyn.lhs b/compiler/stgSyn/StgSyn.lhs
index f1c50cc..6cd7df7 100644
--- a/compiler/stgSyn/StgSyn.lhs
+++ b/compiler/stgSyn/StgSyn.lhs
@@ -9,6 +9,13 @@ form of @CoreSyntax@, the style being one that happens to be ideally
 suited to spineless tagless code generation.
 
 \begin{code}
+{-# OPTIONS -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/Commentary/CodingStyle#Warnings
+-- for details
+
 module StgSyn (
 	GenStgArg(..), 
 	GenStgLiveVars,
@@ -65,9 +72,8 @@ import TyCon            ( TyCon )
 import UniqSet		( isEmptyUniqSet, uniqSetToList, UniqSet )
 import Unique		( Unique )
 import Bitmap
-import DynFlags		( DynFlags )
-import Packages		( HomeModules )
 import StaticFlags	( opt_SccProfilingOn )
+import Module
 \end{code}
 
 %************************************************************************
@@ -106,18 +112,18 @@ data GenStgArg occ
 isStgTypeArg (StgTypeArg _) = True
 isStgTypeArg other	    = False
 
-isDllArg :: HomeModules -> StgArg -> Bool
+isDllArg :: PackageId -> StgArg -> Bool
 	-- Does this argument refer to something in a different DLL?
-isDllArg hmods (StgTypeArg v)  = False
-isDllArg hmods (StgVarArg v)   = isDllName hmods (idName v)
-isDllArg hmods (StgLitArg lit) = False
+isDllArg this_pkg (StgTypeArg v)  = False
+isDllArg this_pkg (StgVarArg v)   = isDllName this_pkg (idName v)
+isDllArg this_pkg (StgLitArg lit) = False
 
-isDllConApp :: HomeModules -> DataCon -> [StgArg] -> Bool
+isDllConApp :: PackageId -> DataCon -> [StgArg] -> Bool
 	-- Does this constructor application refer to 
 	-- anything in a different DLL?
 	-- If so, we can't allocate it statically
-isDllConApp hmods con args
-   = isDllName hmods (dataConName con) || any (isDllArg hmods) args
+isDllConApp this_pkg con args
+   = isDllName this_pkg (dataConName con) || any (isDllArg this_pkg) args
 
 stgArgType :: StgArg -> Type
 	-- Very half baked becase we have lost the type arguments
@@ -168,13 +174,16 @@ constructors, primitives, and literals.
 \begin{code}
   | StgLit	Literal
   
+	-- StgConApp is vital for returning unboxed tuples
+	-- which can't be let-bound first
   | StgConApp	DataCon
 		[GenStgArg occ]	-- Saturated
 
   | StgOpApp	StgOp		-- Primitive op or foreign call
 		[GenStgArg occ]	-- Saturated
-		Type		-- Result type; we need to know the result type
-				-- so that we can assign result registers.
+		Type		-- Result type
+				-- We need to know this so that we can 
+				-- assign result registers
 \end{code}
 
 %************************************************************************
@@ -350,6 +359,21 @@ Finally for @scc@ expressions we introduce a new STG construct.
   | StgSCC
 	CostCentre		-- label of SCC expression
 	(GenStgExpr bndr occ)	-- scc expression
+\end{code}
+
+%************************************************************************
+%*									*
+\subsubsection{@GenStgExpr@: @hpc@ expressions}
+%*									*
+%************************************************************************
+
+Finally for @scc@ expressions we introduce a new STG construct.
+
+\begin{code}
+  | StgTick
+    Module			-- the module of the source of this tick
+    Int				-- tick number
+    (GenStgExpr bndr occ)	-- sub expression
   -- end of GenStgExpr
 \end{code}
 
@@ -720,6 +744,10 @@ pprStgExpr (StgSCC cc expr)
   = sep [ hsep [ptext SLIT("_scc_"), ppr cc],
 	  pprStgExpr expr ]
 
+pprStgExpr (StgTick m n expr)
+  = sep [ hsep [ptext SLIT("_tick_"),  pprModule m,text (show n)],
+	  pprStgExpr expr ]
+
 pprStgExpr (StgCase expr lvs_whole lvs_rhss bndr srt alt_type alts)
   = sep [sep [ptext SLIT("case"),
 	   nest 4 (hsep [pprStgExpr expr,