-- Colors in graphviz graphs could be nicer.
--
+{-# OPTIONS_GHC -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/WorkingConventions#Warnings
+-- for details
+
module RegAllocColor (
regAlloc,
regDotColor
where
-#include "nativeGen/NCG.h"
-
import qualified GraphColor as Color
import RegLiveness
import RegSpill
+import RegSpillClean
+import RegAllocStats
import MachRegs
import MachInstrs
import RegCoalesce
-- | The top level of the graph coloring register allocator.
--
regAlloc
- :: UniqFM (UniqSet Reg) -- ^ the registers we can use for allocation
- -> UniqSet Int -- ^ the set of available spill slots.
- -> [LiveCmmTop] -- ^ code annotated with liveness information.
+ :: Bool -- ^ whether to generate RegAllocStats, or not.
+ -> UniqFM (UniqSet Reg) -- ^ the registers we can use for allocation
+ -> UniqSet Int -- ^ the set of available spill slots.
+ -> [LiveCmmTop] -- ^ code annotated with liveness information.
-> UniqSM
- ( [NatCmmTop] -- ^ code with registers allocated.
- , [ ( [LiveCmmTop]
- , Color.Graph Reg RegClass Reg) ]) -- ^ code and graph for each pass
+ ( [NatCmmTop] -- ^ code with registers allocated.
+ , [RegAllocStats] ) -- ^ stats for each stage of allocation
-regAlloc regsFree slotsFree code
+regAlloc dump regsFree slotsFree code
= do
(code_final, debug_codeGraphs, graph_final)
- <- regAlloc_spin 0 trivColorable regsFree slotsFree [] code
+ <- regAlloc_spin dump 0 trivColorable regsFree slotsFree [] code
return ( code_final
- , debug_codeGraphs )
+ , reverse debug_codeGraphs )
-regAlloc_spin (spinCount :: Int) triv regsFree slotsFree debug_codeGraphs code
+regAlloc_spin dump (spinCount :: Int) triv regsFree slotsFree debug_codeGraphs code
= do
-- check that we're not running off down the garden path.
when (spinCount > maxSpinCount)
-- build a conflict graph from the code.
graph <- buildGraph code
- -- build a map of how many instructions each reg lives for
- -- this lazy, it won't be computed unless we need to spill
+ -- build a map of how many instructions each reg lives for.
+ -- this is lazy, it won't be computed unless we need to spill
let fmLife = plusUFMs_C (\(r1, l1) (r2, l2) -> (r1, l1 + l2))
$ map lifetimeCount code
+ -- record startup state
+ let stat1 =
+ if spinCount == 0
+ then Just $ RegAllocStatsStart
+ { raLiveCmm = code
+ , raGraph = graph
+ , raLifetimes = fmLife }
+ else Nothing
+
+
-- the function to choose regs to leave uncolored
let spill = chooseSpill_maxLife fmLife
then do
-- patch the registers using the info in the graph
let code_patched = map (patchRegsFromGraph graph_colored) code
+
+ -- clean out unneeded SPILL/RELOADs
+ let code_spillclean = map cleanSpills code_patched
+
+ -- strip off liveness information
let code_nat = map stripLive code_patched
+
+ -- rewrite SPILL/REALOAD pseudos into real instructions
+ let spillNatTop = mapGenBlockTop spillNatBlock
+ let code_final = map spillNatTop code_nat
- return ( code_nat
- , debug_codeGraphs ++ [(code, graph_colored), (code_patched, graph_colored)]
+ -- record what happened in this stage for debugging
+ let stat =
+ RegAllocStatsColored
+ { raGraph = graph_colored
+ , raPatched = code_patched
+ , raSpillClean = code_spillclean
+ , raFinal = code_final
+ , raSRMs = foldl addSRM (0, 0, 0) $ map countSRMs code_spillclean }
+
+ return ( code_final
+ , if dump
+ then [stat] ++ maybeToList stat1 ++ debug_codeGraphs
+ else []
, graph_colored)
else do
-- spill the uncolored regs
- (code_spilled, slotsFree')
+ (code_spilled, slotsFree', spillStats)
<- regSpill code slotsFree rsSpill
-- recalculate liveness
let code_nat = map stripLive code_spilled
code_relive <- mapM regLiveness code_nat
+
+ -- record what happened in this stage for debugging
+ let stat =
+ RegAllocStatsSpill
+ { raGraph = graph_colored
+ , raSpillStats = spillStats
+ , raLifetimes = fmLife
+ , raSpilled = code_spilled }
-- try again
- regAlloc_spin (spinCount + 1) triv regsFree slotsFree'
- (debug_codeGraphs ++ [(code, graph_colored)])
+ regAlloc_spin dump (spinCount + 1) triv regsFree slotsFree'
+ (if dump
+ then [stat] ++ maybeToList stat1 ++ debug_codeGraphs
+ else [])
code_relive
-- | Add some conflict edges to the graph.
--- Conflicts between virtual and real regs are recorded as exlusions.
+-- Conflicts between virtual and real regs are recorded as exclusions.
--
graphAddConflictSet
:: UniqSet Reg
in graph2
--- | Add some coalesences edges to the graph
+-- | Add some coalesence edges to the graph
-- Coalesences between virtual and real regs are recorded as preferences.
--
graphAddCoalesce
in patchEraseLive patchF code
------
--- Register colors for drawing conflict graphs
--- Keep this out of MachRegs.hs because it's specific to the graph coloring allocator.
-
-
--- reg colors for x86
-#if i386_TARGET_ARCH
-regDotColor :: Reg -> SDoc
-regDotColor reg
- = let Just str = lookupUFM regColors reg
- in text str
-
-regColors
- = listToUFM
- $ [ (eax, "#00ff00")
- , (ebx, "#0000ff")
- , (ecx, "#00ffff")
- , (edx, "#0080ff")
-
- , (fake0, "#ff00ff")
- , (fake1, "#ff00aa")
- , (fake2, "#aa00ff")
- , (fake3, "#aa00aa")
- , (fake4, "#ff0055")
- , (fake5, "#5500ff") ]
-#endif
-
-
--- reg colors for x86_64
-#if x86_64_TARGET_ARCH
-regDotColor :: Reg -> SDoc
-regDotColor reg
- = let Just str = lookupUFM regColors reg
- in text str
-
-regColors
- = listToUFM
- $ [ (rax, "#00ff00"), (eax, "#00ff00")
- , (rbx, "#0000ff"), (ebx, "#0000ff")
- , (rcx, "#00ffff"), (ecx, "#00ffff")
- , (rdx, "#0080ff"), (edx, "#00ffff")
- , (r8, "#00ff80")
- , (r9, "#008080")
- , (r10, "#0040ff")
- , (r11, "#00ff40")
- , (r12, "#008040")
- , (r13, "#004080")
- , (r14, "#004040")
- , (r15, "#002080") ]
-
- ++ zip (map RealReg [16..31]) (repeat "red")
-#endif
-
-
--- reg colors for ppc
-#if powerpc_TARGET_ARCH
-regDotColor :: Reg -> SDoc
-regDotColor reg
- = case regClass reg of
- RcInteger -> text "blue"
- RcFloat -> text "red"
-#endif
-
-
-{-
-toX11Color (r, g, b)
- = let rs = padL 2 '0' (showHex r "")
- gs = padL 2 '0' (showHex r "")
- bs = padL 2 '0' (showHex r "")
-
- padL n c s
- = replicate (n - length s) c ++ s
- in "#" ++ rs ++ gs ++ bs
--}
-
plusUFMs_C :: (elt -> elt -> elt) -> [UniqFM elt] -> UniqFM elt
plusUFMs_C f maps
= foldl (plusUFM_C f) emptyUFM maps
projects / ghc-hetmet.git / blobdiff