, DefinerOfSlots, UserOfSlots, foldSlotsDefd, foldSlotsUsed
, RegSet, emptyRegSet, elemRegSet, extendRegSet, deleteFromRegSet, mkRegSet
, plusRegSet, minusRegSet, timesRegSet
+ , regUsedIn
, Area(..), AreaId(..), SubArea, SubAreaSet, AreaMap, isStackSlotOf
-- MachOp
foldRegsDefd _ set Nothing = set
foldRegsDefd f set (Just x) = foldRegsDefd f set x
+-----------------------------------------------------------------------------
+-- Another reg utility
+
+regUsedIn :: CmmReg -> CmmExpr -> Bool
+_ `regUsedIn` CmmLit _ = False
+reg `regUsedIn` CmmLoad e _ = reg `regUsedIn` e
+reg `regUsedIn` CmmReg reg' = reg == reg'
+reg `regUsedIn` CmmRegOff reg' _ = reg == reg'
+reg `regUsedIn` CmmMachOp _ es = any (reg `regUsedIn`) es
+_ `regUsedIn` CmmStackSlot _ _ = False
-----------------------------------------------------------------------------
-- Stack slots