X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FnativeGen%2FRegAlloc%2FGraph%2FSpillCost.hs;h=5932d3100d55f849388b5da563ca97363e19ff7d;hb=85981a6fc4bb94af433b0b3655c26c5ec4dda1bd;hp=8ae87a0814d08a6b631b7c237d95148be5361178;hpb=337d98de1eaf6689269c9788d1983569a98d46a0;p=ghc-hetmet.git

diff --git a/compiler/nativeGen/RegAlloc/Graph/SpillCost.hs b/compiler/nativeGen/RegAlloc/Graph/SpillCost.hs
index 8ae87a0..5932d31 100644
--- a/compiler/nativeGen/RegAlloc/Graph/SpillCost.hs
+++ b/compiler/nativeGen/RegAlloc/Graph/SpillCost.hs
@@ -16,28 +16,29 @@ module RegAlloc.Graph.SpillCost (
 
 where
 
+import RegAlloc.Liveness
+import Instruction
+import RegClass
+import Reg
+
 import GraphBase
-import RegLiveness
-import RegAllocInfo
-import MachInstrs
-import MachRegs
+
 import BlockId
 import Cmm
-
 import UniqFM
 import UniqSet
+import Digraph		(flattenSCCs)
 import Outputable
 import State
 
 import Data.List	(nub, minimumBy)
 import Data.Maybe
-import Control.Monad
 
 type SpillCostRecord
- = 	( Reg	-- register name
-	, Int	-- number of writes to this reg
-	, Int	-- number of reads from this reg
-	, Int)	-- number of instrs this reg was live on entry to
+ = 	( VirtualReg	-- register name
+	, Int		-- number of writes to this reg
+	, Int		-- number of reads from this reg
+	, Int)		-- number of instrs this reg was live on entry to
 
 type SpillCostInfo
 	= UniqFM SpillCostRecord
@@ -62,38 +63,44 @@ plusSpillCostRecord (r1, a1, b1, c1) (r2, a2, b2, c2)
 --	and the number of instructions it was live on entry to (lifetime)
 --
 slurpSpillCostInfo
-	:: LiveCmmTop
+	:: (Outputable instr, Instruction instr)
+	=> LiveCmmTop instr
 	-> SpillCostInfo
 
 slurpSpillCostInfo cmm
 	= execState (countCmm cmm) zeroSpillCostInfo
  where
 	countCmm CmmData{}		= return ()
-	countCmm (CmmProc info _ _ (ListGraph blocks))
-		= mapM_ (countComp info) blocks
-
-	countComp info (BasicBlock _ blocks)
-		= mapM_ (countBlock info) blocks
+	countCmm (CmmProc info _ _ sccs)
+		= mapM_ (countBlock info)
+		$ flattenSCCs sccs
 
 	-- lookup the regs that are live on entry to this block in
 	--	the info table from the CmmProc
  	countBlock info (BasicBlock blockId instrs)
-		| LiveInfo _ _ blockLive	<- info
+		| LiveInfo _ _ (Just blockLive)	<- info
 		, Just rsLiveEntry		<- lookupBlockEnv blockLive blockId
-		= countLIs rsLiveEntry instrs
+
+		, rsLiveEntry_virt	<- mapUniqSet (\(RegVirtual vr) -> vr) 
+					$  filterUniqSet isVirtualReg rsLiveEntry
+						
+		= countLIs rsLiveEntry_virt instrs
 
 		| otherwise
-		= error "RegLiveness.slurpSpillCostInfo: bad block"
+		= error "RegAlloc.SpillCost.slurpSpillCostInfo: bad block"
 
 	countLIs _      []
 		= return ()
 
 	-- skip over comment and delta pseudo instrs
-	countLIs rsLive (Instr instr Nothing : lis)
-		| COMMENT{}	<- instr
+	countLIs rsLive (SPILL{} : lis)
+		= countLIs rsLive lis
+		
+	countLIs rsLive (RELOAD{} : lis)
 		= countLIs rsLive lis
 
-		| DELTA{}	<- instr
+	countLIs rsLive (Instr instr Nothing : lis)
+		| isMetaInstr instr
 		= countLIs rsLive lis
 
 		| otherwise
@@ -106,17 +113,25 @@ slurpSpillCostInfo cmm
 		mapM_ incLifetime $ uniqSetToList rsLiveEntry
 
 		-- increment counts for what regs were read/written from
-		let (RU read written)	= regUsage instr
-		mapM_ incUses	$ filter (not . isRealReg) $ nub read
-		mapM_ incDefs 	$ filter (not . isRealReg) $ nub written
+		let (RU read written)	= regUsageOfInstr instr
+		mapM_ incUses	$ catMaybes $ map takeVirtualReg $ nub read
+		mapM_ incDefs 	$ catMaybes $ map takeVirtualReg $ nub written
 
 		-- compute liveness for entry to next instruction.
+		let takeVirtuals set
+			= mapUniqSet (\(RegVirtual vr) -> vr)
+			$ filterUniqSet isVirtualReg set
+
+		let liveDieRead_virt	= takeVirtuals (liveDieRead  live)
+		let liveDieWrite_virt	= takeVirtuals (liveDieWrite live)
+		let liveBorn_virt	= takeVirtuals (liveBorn     live)
+
 	 	let rsLiveAcross
-			= rsLiveEntry `minusUniqSet` (liveDieRead live)
+			= rsLiveEntry `minusUniqSet` liveDieRead_virt
 
 	 	let rsLiveNext
-			= (rsLiveAcross `unionUniqSets` (liveBorn     live))
-				        `minusUniqSet` (liveDieWrite live)
+			= (rsLiveAcross `unionUniqSets` liveBorn_virt)
+				        `minusUniqSet`  liveDieWrite_virt
 
 	 	countLIs rsLiveNext lis
 
@@ -129,8 +144,8 @@ slurpSpillCostInfo cmm
 
 chooseSpill
 	:: SpillCostInfo
-	-> Graph Reg RegClass Reg
-	-> Reg
+	-> Graph VirtualReg RegClass RealReg
+	-> VirtualReg
 
 chooseSpill info graph
  = let	cost	= spillCost_length info graph
@@ -206,19 +221,20 @@ spillCost_chaitin info graph reg
 -- Just spill the longest live range.
 spillCost_length
 	:: SpillCostInfo
-	-> Graph Reg RegClass Reg
-	-> Reg
+	-> Graph VirtualReg RegClass RealReg
+	-> VirtualReg
 	-> Float
 
 spillCost_length info _ reg
 	| lifetime <= 1		= 1/0
 	| otherwise		= 1 / fromIntegral lifetime
 	where (_, _, _, lifetime)
-		= fromMaybe (reg, 0, 0, 0) $ lookupUFM info reg
+		= fromMaybe (reg, 0, 0, 0) 
+		$ lookupUFM info reg
 
 
 
-lifeMapFromSpillCostInfo :: SpillCostInfo -> UniqFM (Reg, Int)
+lifeMapFromSpillCostInfo :: SpillCostInfo -> UniqFM (VirtualReg, Int)
 lifeMapFromSpillCostInfo info
  	= listToUFM
 	$ map (\(r, _, _, life)	-> (r, (r, life)))
@@ -226,11 +242,20 @@ lifeMapFromSpillCostInfo info
 
 
 -- | Work out the degree (number of neighbors) of this node which have the same class.
-nodeDegree :: Graph Reg RegClass Reg -> Reg -> Int
-nodeDegree graph reg
+nodeDegree 
+	:: (VirtualReg -> RegClass)
+	-> Graph VirtualReg RegClass RealReg 
+	-> VirtualReg 
+	-> Int
+
+nodeDegree classOfVirtualReg graph reg
 	| Just node	<- lookupUFM (graphMap graph) reg
-	, virtConflicts	<- length 	$ filter (\r -> regClass r == regClass reg)
-					$ uniqSetToList $ nodeConflicts node
+
+	, virtConflicts	<- length 	
+			$ filter (\r -> classOfVirtualReg r == classOfVirtualReg reg)
+			$ uniqSetToList 
+			$ nodeConflicts node
+
 	= virtConflicts + sizeUniqSet (nodeExclusions node)
 
 	| otherwise
@@ -238,12 +263,21 @@ nodeDegree graph reg
 
 
 -- | Show a spill cost record, including the degree from the graph and final calulated spill cos
-pprSpillCostRecord :: Graph Reg RegClass Reg -> SpillCostRecord -> SDoc
-pprSpillCostRecord graph (reg, uses, defs, life)
+pprSpillCostRecord 
+	:: (VirtualReg -> RegClass)
+	-> (Reg -> SDoc)
+	-> Graph VirtualReg RegClass RealReg 
+	-> SpillCostRecord 
+	-> SDoc
+
+pprSpillCostRecord regClass pprReg graph (reg, uses, defs, life)
  	=  hsep
-	[ ppr reg
+	[ pprReg (RegVirtual reg)
 	, ppr uses
 	, ppr defs
 	, ppr life
-	, ppr $ nodeDegree graph reg
-	, text $ show $ (fromIntegral (uses + defs) / fromIntegral (nodeDegree graph reg) :: Float) ]
+	, ppr $ nodeDegree regClass graph reg
+	, text $ show $ (fromIntegral (uses + defs) 
+			/ fromIntegral (nodeDegree regClass graph reg) :: Float) ]
+
+