X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FbasicTypes%2FId.lhs;h=61a39f1fa06ee1491c1153fa261154e1e3976900;hb=7739158ff9d983f80cb269f3c7cb38108e72e8ec;hp=edaeb7a0ab45b7f0f3e43e3f2ce0143c1b148f98;hpb=49c98d143c382a1341e1046f5ca00819a25691ba;p=ghc-hetmet.git

diff --git a/compiler/basicTypes/Id.lhs b/compiler/basicTypes/Id.lhs
index edaeb7a..61a39f1 100644
--- a/compiler/basicTypes/Id.lhs
+++ b/compiler/basicTypes/Id.lhs
@@ -22,10 +22,10 @@ module Id (
 	-- Modifying an Id
 	setIdName, setIdUnique, Id.setIdType, setIdExported, setIdNotExported, 
 	setIdInfo, lazySetIdInfo, modifyIdInfo, maybeModifyIdInfo,
-	zapLamIdInfo, zapDemandIdInfo, 
+	zapLamIdInfo, zapDemandIdInfo, zapFragileIdInfo,
 
 	-- Predicates
-	isImplicitId, isDeadBinder, isDictId,
+	isImplicitId, isDeadBinder, isDictId, isStrictId,
 	isExportedId, isLocalId, isGlobalId,
 	isRecordSelector, isNaughtyRecordSelector,
 	isClassOpId_maybe,
@@ -33,6 +33,7 @@ module Id (
 	isFCallId, isFCallId_maybe,
 	isDataConWorkId, isDataConWorkId_maybe, isDataConId_maybe, idDataCon,
 	isBottomingId, idIsFrom,
+        isTickBoxOp, isTickBoxOp_maybe,
 	hasNoBinding, 
 
 	-- Inline pragma stuff
@@ -313,6 +314,19 @@ isDeadBinder bndr | isId bndr = isDeadOcc (idOccInfo bndr)
 		  | otherwise = False	-- TyVars count as not dead
 \end{code}
 
+\begin{code}
+isTickBoxOp :: Id -> Bool
+isTickBoxOp id = 
+  case globalIdDetails id of
+    TickBoxOpId tick -> True
+    _                -> False
+
+isTickBoxOp_maybe :: Id -> Maybe TickBoxOp
+isTickBoxOp_maybe id = 
+  case globalIdDetails id of
+    TickBoxOpId tick -> Just tick
+    _                -> Nothing
+\end{code}
 
 %************************************************************************
 %*									*
@@ -354,6 +368,20 @@ setIdNewStrictness id sig = modifyIdInfo (`setNewStrictnessInfo` Just sig) id
 
 zapIdNewStrictness :: Id -> Id
 zapIdNewStrictness id = modifyIdInfo (`setNewStrictnessInfo` Nothing) id
+\end{code}
+
+This predicate says whether the id has a strict demand placed on it or
+has a type such that it can always be evaluated strictly (e.g., an
+unlifted type, but see the comment for isStrictType).  We need to
+check separately whether <id> has a so-called "strict type" because if
+the demand for <id> hasn't been computed yet but <id> has a strict
+type, we still want (isStrictId <id>) to be True.
+\begin{code}
+isStrictId :: Id -> Bool
+isStrictId id
+  = ASSERT2( isId id, text "isStrictId: not an id: " <+> ppr id )
+           (isStrictDmd (idNewDemandInfo id)) || 
+           (isStrictType (idType id))
 
 	---------------------------------
 	-- WORKER ID
@@ -513,9 +541,15 @@ clearOneShotLambda id
 \end{code}
 
 \begin{code}
+zapInfo :: (IdInfo -> Maybe IdInfo) -> Id -> Id
+zapInfo zapper id = maybeModifyIdInfo (zapper (idInfo id)) id
+
 zapLamIdInfo :: Id -> Id
-zapLamIdInfo id = maybeModifyIdInfo (zapLamInfo (idInfo id)) id
+zapLamIdInfo = zapInfo zapLamInfo
+
+zapDemandIdInfo = zapInfo zapDemandInfo
 
-zapDemandIdInfo id = maybeModifyIdInfo (zapDemandInfo (idInfo id)) id
+zapFragileIdInfo :: Id -> Id
+zapFragileIdInfo = zapInfo zapFragileInfo 
 \end{code}