-- -----------------------------------------------------------------------------
\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 AsmCodeGen ( nativeCodeGen ) where
#include "HsVersions.h"
-#include "NCG.h"
+#include "nativeGen/NCG.h"
import MachInstrs
import MachRegs
import MachCodeGen
import PprMach
-import RegisterAlloc
-import RegAllocInfo ( jumpDests )
+import RegAllocInfo
import NCGMonad
import PositionIndependentCode
+import RegLiveness
+import RegCoalesce
+import qualified RegAllocLinear as Linear
+import qualified RegAllocColor as Color
+import qualified RegAllocStats as Color
+import qualified GraphColor as Color
import Cmm
import CmmOpt ( cmmMiniInline, cmmMachOpFold )
-import PprCmm ( pprStmt, pprCmms )
+import PprCmm ( pprStmt, pprCmms, pprCmm )
import MachOp
-import CLabel ( CLabel, mkSplitMarkerLabel, mkAsmTempLabel )
-#if powerpc_TARGET_ARCH
-import CLabel ( mkRtsCodeLabel )
-#endif
+import CLabel
+import State
import UniqFM
import Unique ( Unique, getUnique )
import UniqSupply
import FastTypes
import List ( groupBy, sortBy )
-import CLabel ( pprCLabel )
import ErrUtils ( dumpIfSet_dyn )
-import DynFlags ( DynFlags, DynFlag(..), dopt )
+import DynFlags
import StaticFlags ( opt_Static, opt_PIC )
+import Util
import Config ( cProjectVersion )
+import Module
import Digraph
import qualified Pretty
import Outputable
import FastString
+import UniqSet
+import ErrUtils
-- DEBUGGING ONLY
--import OrdList
-#ifdef NCG_DEBUG
-import List ( intersperse )
-#endif
-
-import DATA_INT
-import DATA_WORD
-import DATA_BITS
-import GLAEXTS
+import Data.List
+import Data.Int
+import Data.Word
+import Data.Bits
+import Data.Maybe
+import GHC.Exts
+import Control.Monad
+import System.IO
{-
The native-code generator has machine-independent and
-- -----------------------------------------------------------------------------
-- Top-level of the native codegen
--- NB. We *lazilly* compile each block of code for space reasons.
-
-nativeCodeGen :: DynFlags -> [Cmm] -> UniqSupply -> IO Pretty.Doc
-nativeCodeGen dflags cmms us
- = let (res, _) = initUs us $
- cgCmm (concat (map add_split cmms))
-
- cgCmm :: [CmmTop] -> UniqSM (Cmm, Pretty.Doc, [CLabel])
- cgCmm tops =
- lazyMapUs (cmmNativeGen dflags) tops `thenUs` \ results ->
- case unzip3 results of { (cmms,docs,imps) ->
- returnUs (Cmm cmms, my_vcat docs, concat imps)
- }
- in
- case res of { (ppr_cmms, insn_sdoc, imports) -> do
- dumpIfSet_dyn dflags Opt_D_dump_opt_cmm "Optimised Cmm" (pprCmms [ppr_cmms])
- return (insn_sdoc Pretty.$$ dyld_stubs imports
+--------------------
+nativeCodeGen :: DynFlags -> Handle -> UniqSupply -> [RawCmm] -> IO ()
+nativeCodeGen dflags h us cmms
+ = do
+ let split_cmms = concat $ map add_split cmms
+
+ (imports, prof)
+ <- cmmNativeGens dflags h us split_cmms [] []
+
+ let (native, colorStats, linearStats)
+ = unzip3 prof
+
+ -- dump native code
+ dumpIfSet_dyn dflags
+ Opt_D_dump_asm "Asm code"
+ (vcat $ map (docToSDoc . pprNatCmmTop) $ concat native)
+
+ -- dump global NCG stats for graph coloring allocator
+ (case concat $ catMaybes colorStats of
+ [] -> return ()
+ stats -> do
+ -- build the global register conflict graph
+ let graphGlobal
+ = foldl Color.union Color.initGraph
+ $ [ Color.raGraph stat
+ | stat@Color.RegAllocStatsStart{} <- stats]
+
+ dumpSDoc dflags Opt_D_dump_asm_stats "NCG stats"
+ $ Color.pprStats stats graphGlobal
+
+ dumpIfSet_dyn dflags
+ Opt_D_dump_asm_conflicts "Register conflict graph"
+ $ Color.dotGraph Color.regDotColor trivColorable
+ $ graphGlobal)
+
+
+ -- dump global NCG stats for linear allocator
+ (case concat $ catMaybes linearStats of
+ [] -> return ()
+ stats -> dumpSDoc dflags Opt_D_dump_asm_stats "NCG stats"
+ $ Linear.pprStats (concat native) stats)
+
+ -- write out the imports
+ Pretty.printDoc Pretty.LeftMode h
+ $ makeImportsDoc (concat imports)
+
+ return ()
+
+ where add_split (Cmm tops)
+ | dopt Opt_SplitObjs dflags = split_marker : tops
+ | otherwise = tops
+
+ split_marker = CmmProc [] mkSplitMarkerLabel [] []
+
+
+-- | Do native code generation on all these cmms.
+--
+cmmNativeGens dflags h us [] impAcc profAcc
+ = return (reverse impAcc, reverse profAcc)
+
+cmmNativeGens dflags h us (cmm : cmms) impAcc profAcc
+ = do
+ (us', native, imports, colorStats, linearStats)
+ <- cmmNativeGen dflags us cmm
+
+ Pretty.printDoc Pretty.LeftMode h
+ $ {-# SCC "pprNativeCode" #-} Pretty.vcat $ map pprNatCmmTop native
+
+ let lsPprNative =
+ if dopt Opt_D_dump_asm dflags
+ || dopt Opt_D_dump_asm_stats dflags
+ then native
+ else []
+
+ -- force evaulation of imports and lsPprNative to avoid space leak
+ seqString (showSDoc $ vcat $ map ppr imports) `seq` return ()
+ lsPprNative `seq` return ()
+
+ cmmNativeGens dflags h us' cmms
+ (imports : impAcc)
+ ((lsPprNative, colorStats, linearStats) : profAcc)
+
+ where seqString [] = ()
+ seqString (x:xs) = x `seq` seqString xs `seq` ()
+
+
+-- | Complete native code generation phase for a single top-level chunk of Cmm.
+-- Dumping the output of each stage along the way.
+-- Global conflict graph and NGC stats
+cmmNativeGen
+ :: DynFlags
+ -> UniqSupply
+ -> RawCmmTop
+ -> IO ( UniqSupply
+ , [NatCmmTop]
+ , [CLabel]
+ , Maybe [Color.RegAllocStats]
+ , Maybe [Linear.RegAllocStats])
+
+cmmNativeGen dflags us cmm
+ = do
+ -- rewrite assignments to global regs
+ let (fixed_cmm, usFix) =
+ {-# SCC "fixAssignsTop" #-}
+ initUs us $ fixAssignsTop cmm
+
+ -- cmm to cmm optimisations
+ let (opt_cmm, imports) =
+ {-# SCC "cmmToCmm" #-}
+ cmmToCmm dflags fixed_cmm
+
+ dumpIfSet_dyn dflags
+ Opt_D_dump_opt_cmm "Optimised Cmm"
+ (pprCmm $ Cmm [opt_cmm])
+
+ -- generate native code from cmm
+ let ((native, lastMinuteImports), usGen) =
+ {-# SCC "genMachCode" #-}
+ initUs usFix $ genMachCode dflags opt_cmm
+
+ dumpIfSet_dyn dflags
+ Opt_D_dump_asm_native "Native code"
+ (vcat $ map (docToSDoc . pprNatCmmTop) native)
+
+
+ -- tag instructions with register liveness information
+ let (withLiveness, usLive) =
+ {-# SCC "regLiveness" #-}
+ initUs usGen $ mapUs regLiveness native
+
+ dumpIfSet_dyn dflags
+ Opt_D_dump_asm_liveness "Liveness annotations added"
+ (vcat $ map ppr withLiveness)
+
+
+ -- allocate registers
+ (alloced, usAlloc, ppr_raStatsColor, ppr_raStatsLinear) <-
+ if dopt Opt_RegsGraph dflags
+ then do
+ -- the regs usable for allocation
+ let alloc_regs
+ = foldr (\r -> plusUFM_C unionUniqSets
+ $ unitUFM (regClass r) (unitUniqSet r))
+ emptyUFM
+ $ map RealReg allocatableRegs
+
+ -- if any of these dump flags are turned on we want to hang on to
+ -- intermediate structures in the allocator - otherwise tell the
+ -- allocator to ditch them early so we don't end up creating space leaks.
+ let generateRegAllocStats = or
+ [ dopt Opt_D_dump_asm_regalloc_stages dflags
+ , dopt Opt_D_dump_asm_stats dflags
+ , dopt Opt_D_dump_asm_conflicts dflags ]
+
+ -- graph coloring register allocation
+ let ((alloced, regAllocStats), usAlloc)
+ = {-# SCC "regAlloc(color)" #-}
+ initUs usLive
+ $ Color.regAlloc
+ generateRegAllocStats
+ alloc_regs
+ (mkUniqSet [0..maxSpillSlots])
+ withLiveness
+
+ -- dump out what happened during register allocation
+ dumpIfSet_dyn dflags
+ Opt_D_dump_asm_regalloc "Registers allocated"
+ (vcat $ map (docToSDoc . pprNatCmmTop) alloced)
+
+ dumpIfSet_dyn dflags
+ Opt_D_dump_asm_regalloc_stages "Build/spill stages"
+ (vcat $ map (\(stage, stats)
+ -> text "-- Stage " <> int stage
+ $$ ppr stats)
+ $ zip [0..] regAllocStats)
+
+ let mPprStats =
+ if dopt Opt_D_dump_asm_stats dflags
+ then Just regAllocStats else Nothing
+
+ -- force evaluation of the Maybe to avoid space leak
+ mPprStats `seq` return ()
+
+ return ( alloced, usAlloc
+ , mPprStats
+ , Nothing)
+
+ else do
+ -- do linear register allocation
+ let ((alloced, regAllocStats), usAlloc)
+ = {-# SCC "regAlloc(linear)" #-}
+ initUs usLive
+ $ liftM unzip
+ $ mapUs Linear.regAlloc withLiveness
+
+ dumpIfSet_dyn dflags
+ Opt_D_dump_asm_regalloc "Registers allocated"
+ (vcat $ map (docToSDoc . pprNatCmmTop) alloced)
+
+ let mPprStats =
+ if dopt Opt_D_dump_asm_stats dflags
+ then Just (catMaybes regAllocStats) else Nothing
+
+ -- force evaluation of the Maybe to avoid space leak
+ mPprStats `seq` return ()
+
+ return ( alloced, usAlloc
+ , Nothing
+ , mPprStats)
+
+ ---- shortcut branches
+ let shorted =
+ {-# SCC "shortcutBranches" #-}
+ shortcutBranches dflags alloced
+
+ ---- sequence blocks
+ let sequenced =
+ {-# SCC "sequenceBlocks" #-}
+ map sequenceTop shorted
+
+ ---- x86fp_kludge
+ let final_mach_code =
+#if i386_TARGET_ARCH
+ {-# SCC "x86fp_kludge" #-}
+ map x86fp_kludge sequenced
+#else
+ sequenced
+#endif
+
+ return ( usAlloc
+ , final_mach_code
+ , lastMinuteImports ++ imports
+ , ppr_raStatsColor
+ , ppr_raStatsLinear)
+
+
+#if i386_TARGET_ARCH
+x86fp_kludge :: NatCmmTop -> NatCmmTop
+x86fp_kludge top@(CmmData _ _) = top
+x86fp_kludge top@(CmmProc info lbl params code) =
+ CmmProc info lbl params (map bb_i386_insert_ffrees code)
+ where
+ bb_i386_insert_ffrees (BasicBlock id instrs) =
+ BasicBlock id (i386_insert_ffrees instrs)
+#endif
+
+
+-- | Build a doc for all the imports.
+--
+makeImportsDoc :: [CLabel] -> Pretty.Doc
+makeImportsDoc imports
+ = dyld_stubs imports
+
#if HAVE_SUBSECTIONS_VIA_SYMBOLS
-- On recent versions of Darwin, the linker supports
-- dead-stripping of code and data on a per-symbol basis.
-- stack so add the note in:
Pretty.$$ Pretty.text ".section .note.GNU-stack,\"\",@progbits"
#endif
+#if !defined(darwin_TARGET_OS)
-- And just because every other compiler does, lets stick in
-- an identifier directive: .ident "GHC x.y.z"
Pretty.$$ let compilerIdent = Pretty.text "GHC" Pretty.<+>
Pretty.text cProjectVersion
in Pretty.text ".ident" Pretty.<+>
Pretty.doubleQuotes compilerIdent
- )
- }
-
- where
-
- add_split (Cmm tops)
- | dopt Opt_SplitObjs dflags = split_marker : tops
- | otherwise = tops
-
- split_marker = CmmProc [] mkSplitMarkerLabel [] []
+#endif
- -- Generate "symbol stubs" for all external symbols that might
- -- come from a dynamic library.
-{- dyld_stubs imps = Pretty.vcat $ map pprDyldSymbolStub $
+ where
+ -- Generate "symbol stubs" for all external symbols that might
+ -- come from a dynamic library.
+ dyld_stubs :: [CLabel] -> Pretty.Doc
+{- dyld_stubs imps = Pretty.vcat $ map pprDyldSymbolStub $
map head $ group $ sort imps-}
-
+
-- (Hack) sometimes two Labels pretty-print the same, but have
-- different uniques; so we compare their text versions...
- dyld_stubs imps
- | needImportedSymbols
- = Pretty.vcat $
- (pprGotDeclaration :) $
- map (pprImportedSymbol . fst . head) $
- groupBy (\(_,a) (_,b) -> a == b) $
- sortBy (\(_,a) (_,b) -> compare a b) $
- map doPpr $
- imps
- | otherwise
- = Pretty.empty
-
- where doPpr lbl = (lbl, Pretty.render $ pprCLabel lbl astyle)
- astyle = mkCodeStyle AsmStyle
+ dyld_stubs imps
+ | needImportedSymbols
+ = Pretty.vcat $
+ (pprGotDeclaration :) $
+ map (pprImportedSymbol . fst . head) $
+ groupBy (\(_,a) (_,b) -> a == b) $
+ sortBy (\(_,a) (_,b) -> compare a b) $
+ map doPpr $
+ imps
+ | otherwise
+ = Pretty.empty
+
+ doPpr lbl = (lbl, Pretty.render $ pprCLabel lbl astyle)
+ astyle = mkCodeStyle AsmStyle
-#ifndef NCG_DEBUG
- my_vcat sds = Pretty.vcat sds
-#else
- my_vcat sds = Pretty.vcat (
- intersperse (
- Pretty.char ' '
- Pretty.$$ Pretty.ptext SLIT("# ___ncg_debug_marker")
- Pretty.$$ Pretty.char ' '
- )
- sds
- )
-#endif
-
-
--- Complete native code generation phase for a single top-level chunk
--- of Cmm.
-
-cmmNativeGen :: DynFlags -> CmmTop -> UniqSM (CmmTop, Pretty.Doc, [CLabel])
-cmmNativeGen dflags cmm
- = {-# SCC "fixAssigns" #-}
- fixAssignsTop cmm `thenUs` \ fixed_cmm ->
- {-# SCC "genericOpt" #-}
- cmmToCmm fixed_cmm `bind` \ (cmm, imports) ->
- (if dopt Opt_D_dump_opt_cmm dflags -- space leak avoidance
- then cmm
- else CmmData Text []) `bind` \ ppr_cmm ->
- {-# SCC "genMachCode" #-}
- genMachCode cmm `thenUs` \ (pre_regalloc, lastMinuteImports) ->
- {-# SCC "regAlloc" #-}
- mapUs regAlloc pre_regalloc `thenUs` \ with_regs ->
- {-# SCC "sequenceBlocks" #-}
- map sequenceTop with_regs `bind` \ sequenced ->
- {-# SCC "x86fp_kludge" #-}
- map x86fp_kludge sequenced `bind` \ final_mach_code ->
- {-# SCC "vcat" #-}
- Pretty.vcat (map pprNatCmmTop final_mach_code) `bind` \ final_sdoc ->
-
- returnUs (ppr_cmm, final_sdoc Pretty.$$ Pretty.text "", lastMinuteImports ++ imports)
- where
- x86fp_kludge :: NatCmmTop -> NatCmmTop
- x86fp_kludge top@(CmmData _ _) = top
-#if i386_TARGET_ARCH
- x86fp_kludge top@(CmmProc info lbl params code) =
- CmmProc info lbl params (map bb_i386_insert_ffrees code)
- where
- bb_i386_insert_ffrees (BasicBlock id instrs) =
- BasicBlock id (i386_insert_ffrees instrs)
-#else
- x86fp_kludge top = top
-#endif
-- -----------------------------------------------------------------------------
-- Sequencing the basic blocks
sequenceTop :: NatCmmTop -> NatCmmTop
sequenceTop top@(CmmData _ _) = top
sequenceTop (CmmProc info lbl params blocks) =
- CmmProc info lbl params (sequenceBlocks blocks)
+ CmmProc info lbl params (makeFarBranches $ sequenceBlocks blocks)
-- The algorithm is very simple (and stupid): we make a graph out of
-- the blocks where there is an edge from one block to another iff the
| id == id' = (True, (block,id,out) : reverse accum ++ rest)
| otherwise = reorder id (b:accum) rest
+
+-- -----------------------------------------------------------------------------
+-- Making far branches
+
+-- Conditional branches on PowerPC are limited to +-32KB; if our Procs get too
+-- big, we have to work around this limitation.
+
+makeFarBranches :: [NatBasicBlock] -> [NatBasicBlock]
+
+#if powerpc_TARGET_ARCH
+makeFarBranches blocks
+ | last blockAddresses < nearLimit = blocks
+ | otherwise = zipWith handleBlock blockAddresses blocks
+ where
+ blockAddresses = scanl (+) 0 $ map blockLen blocks
+ blockLen (BasicBlock _ instrs) = length instrs
+
+ handleBlock addr (BasicBlock id instrs)
+ = BasicBlock id (zipWith makeFar [addr..] instrs)
+
+ makeFar addr (BCC ALWAYS tgt) = BCC ALWAYS tgt
+ makeFar addr (BCC cond tgt)
+ | abs (addr - targetAddr) >= nearLimit
+ = BCCFAR cond tgt
+ | otherwise
+ = BCC cond tgt
+ where Just targetAddr = lookupUFM blockAddressMap tgt
+ makeFar addr other = other
+
+ nearLimit = 7000 -- 8192 instructions are allowed; let's keep some
+ -- distance, as we have a few pseudo-insns that are
+ -- pretty-printed as multiple instructions,
+ -- and it's just not worth the effort to calculate
+ -- things exactly
+
+ blockAddressMap = listToUFM $ zip (map blockId blocks) blockAddresses
+#else
+makeFarBranches = id
+#endif
+
+-- -----------------------------------------------------------------------------
+-- Shortcut branches
+
+shortcutBranches :: DynFlags -> [NatCmmTop] -> [NatCmmTop]
+shortcutBranches dflags tops
+ | optLevel dflags < 1 = tops -- only with -O or higher
+ | otherwise = map (apply_mapping mapping) tops'
+ where
+ (tops', mappings) = mapAndUnzip build_mapping tops
+ mapping = foldr plusUFM emptyUFM mappings
+
+build_mapping top@(CmmData _ _) = (top, emptyUFM)
+build_mapping (CmmProc info lbl params [])
+ = (CmmProc info lbl params [], emptyUFM)
+build_mapping (CmmProc info lbl params (head:blocks))
+ = (CmmProc info lbl params (head:others), mapping)
+ -- drop the shorted blocks, but don't ever drop the first one,
+ -- because it is pointed to by a global label.
+ where
+ -- find all the blocks that just consist of a jump that can be
+ -- shorted.
+ (shortcut_blocks, others) = partitionWith split blocks
+ split (BasicBlock id [insn]) | Just dest <- canShortcut insn
+ = Left (id,dest)
+ split other = Right other
+
+ -- build a mapping from BlockId to JumpDest for shorting branches
+ mapping = foldl add emptyUFM shortcut_blocks
+ add ufm (id,dest) = addToUFM ufm id dest
+
+apply_mapping ufm (CmmData sec statics)
+ = CmmData sec (map (shortcutStatic (lookupUFM ufm)) statics)
+ -- we need to get the jump tables, so apply the mapping to the entries
+ -- of a CmmData too.
+apply_mapping ufm (CmmProc info lbl params blocks)
+ = CmmProc info lbl params (map short_bb blocks)
+ where
+ short_bb (BasicBlock id insns) = BasicBlock id $! map short_insn insns
+ short_insn i = shortcutJump (lookupUFM ufm) i
+ -- shortcutJump should apply the mapping repeatedly,
+ -- just in case we can short multiple branches.
+
-- -----------------------------------------------------------------------------
-- Instruction selection
-- Switching between the two monads whilst carrying along the same
-- Unique supply breaks abstraction. Is that bad?
-genMachCode :: CmmTop -> UniqSM ([NatCmmTop], [CLabel])
+genMachCode :: DynFlags -> RawCmmTop -> UniqSM ([NatCmmTop], [CLabel])
-genMachCode cmm_top
+genMachCode dflags cmm_top
= do { initial_us <- getUs
- ; let initial_st = mkNatM_State initial_us 0
+ ; let initial_st = mkNatM_State initial_us 0 dflags
(new_tops, final_st) = initNat initial_st (cmmTopCodeGen cmm_top)
- final_us = natm_us final_st
final_delta = natm_delta final_st
final_imports = natm_imports final_st
; if final_delta == 0
-- the generic optimiser below, to avoid having two separate passes
-- over the Cmm.
-fixAssignsTop :: CmmTop -> UniqSM CmmTop
+fixAssignsTop :: RawCmmTop -> UniqSM RawCmmTop
fixAssignsTop top@(CmmData _ _) = returnUs top
fixAssignsTop (CmmProc info lbl params blocks) =
mapUs fixAssignsBlock blocks `thenUs` \ blocks' ->
returnUs (concat stmtss)
fixAssign :: CmmStmt -> UniqSM [CmmStmt]
-fixAssign (CmmAssign (CmmGlobal BaseReg) src)
- = panic "cmmStmtConFold: assignment to BaseReg";
-
fixAssign (CmmAssign (CmmGlobal reg) src)
| Left realreg <- reg_or_addr
= returnUs [CmmAssign (CmmGlobal reg) src]
where
reg_or_addr = get_GlobalReg_reg_or_addr reg
-fixAssign (CmmCall target results args vols)
- = mapAndUnzipUs fixResult results `thenUs` \ (results',stores) ->
- returnUs (caller_save ++
- CmmCall target results' args vols :
- caller_restore ++
- concat stores)
- where
- -- we also save/restore any caller-saves STG registers here
- (caller_save, caller_restore) = callerSaveVolatileRegs vols
-
- fixResult g@(CmmGlobal reg,hint) =
- case get_GlobalReg_reg_or_addr reg of
- Left realreg -> returnUs (g, [])
- Right baseRegAddr ->
- getUniqueUs `thenUs` \ uq ->
- let local = CmmLocal (LocalReg uq (globalRegRep reg)) in
- returnUs ((local,hint),
- [CmmStore baseRegAddr (CmmReg local)])
- fixResult other =
- returnUs (other,[])
-
fixAssign other_stmt = returnUs [other_stmt]
-- -----------------------------------------------------------------------------
temp assignments, and certain assigns to mem...)
-}
-cmmToCmm :: CmmTop -> (CmmTop, [CLabel])
-cmmToCmm top@(CmmData _ _) = (top, [])
-cmmToCmm (CmmProc info lbl params blocks) = runCmmOpt $ do
+cmmToCmm :: DynFlags -> RawCmmTop -> (RawCmmTop, [CLabel])
+cmmToCmm _ top@(CmmData _ _) = (top, [])
+cmmToCmm dflags (CmmProc info lbl params blocks) = runCmmOpt dflags $ do
blocks' <- mapM cmmBlockConFold (cmmMiniInline blocks)
return $ CmmProc info lbl params blocks'
-newtype CmmOptM a = CmmOptM ([CLabel] -> (# a, [CLabel] #))
+newtype CmmOptM a = CmmOptM (([CLabel], DynFlags) -> (# a, [CLabel] #))
instance Monad CmmOptM where
- return x = CmmOptM $ \imports -> (# x,imports #)
+ return x = CmmOptM $ \(imports, _) -> (# x,imports #)
(CmmOptM f) >>= g =
- CmmOptM $ \imports ->
- case f imports of
+ CmmOptM $ \(imports, dflags) ->
+ case f (imports, dflags) of
(# x, imports' #) ->
case g x of
- CmmOptM g' -> g' imports'
+ CmmOptM g' -> g' (imports', dflags)
addImportCmmOpt :: CLabel -> CmmOptM ()
-addImportCmmOpt lbl = CmmOptM $ \imports -> (# (), lbl:imports #)
+addImportCmmOpt lbl = CmmOptM $ \(imports, dflags) -> (# (), lbl:imports #)
+
+getDynFlagsCmmOpt :: CmmOptM DynFlags
+getDynFlagsCmmOpt = CmmOptM $ \(imports, dflags) -> (# dflags, imports #)
-runCmmOpt :: CmmOptM a -> (a, [CLabel])
-runCmmOpt (CmmOptM f) = case f [] of
+runCmmOpt :: DynFlags -> CmmOptM a -> (a, [CLabel])
+runCmmOpt dflags (CmmOptM f) = case f ([], dflags) of
(# result, imports #) -> (result, imports)
cmmBlockConFold :: CmmBasicBlock -> CmmOptM CmmBasicBlock
cmmStmtConFold stmt
= case stmt of
CmmAssign reg src
- -> do src' <- cmmExprConFold False src
+ -> do src' <- cmmExprConFold DataReference src
return $ case src' of
CmmReg reg' | reg == reg' -> CmmNop
new_src -> CmmAssign reg new_src
CmmStore addr src
- -> do addr' <- cmmExprConFold False addr
- src' <- cmmExprConFold False src
+ -> do addr' <- cmmExprConFold DataReference addr
+ src' <- cmmExprConFold DataReference src
return $ CmmStore addr' src'
CmmJump addr regs
- -> do addr' <- cmmExprConFold True addr
+ -> do addr' <- cmmExprConFold JumpReference addr
return $ CmmJump addr' regs
- CmmCall target regs args vols
+ CmmCall target regs args srt returns
-> do target' <- case target of
- CmmForeignCall e conv -> do
- e' <- cmmExprConFold True e
- return $ CmmForeignCall e' conv
+ CmmCallee e conv -> do
+ e' <- cmmExprConFold CallReference e
+ return $ CmmCallee e' conv
other -> return other
args' <- mapM (\(arg, hint) -> do
- arg' <- cmmExprConFold False arg
+ arg' <- cmmExprConFold DataReference arg
return (arg', hint)) args
- return $ CmmCall target' regs args' vols
+ return $ CmmCall target' regs args' srt returns
CmmCondBranch test dest
- -> do test' <- cmmExprConFold False test
+ -> do test' <- cmmExprConFold DataReference test
return $ case test' of
CmmLit (CmmInt 0 _) ->
CmmComment (mkFastString ("deleted: " ++
other -> CmmCondBranch test' dest
CmmSwitch expr ids
- -> do expr' <- cmmExprConFold False expr
+ -> do expr' <- cmmExprConFold DataReference expr
return $ CmmSwitch expr' ids
other
-> return other
-cmmExprConFold isJumpTarget expr
+cmmExprConFold referenceKind expr
= case expr of
CmmLoad addr rep
- -> do addr' <- cmmExprConFold False addr
+ -> do addr' <- cmmExprConFold DataReference addr
return $ CmmLoad addr' rep
CmmMachOp mop args
-- For MachOps, we first optimize the children, and then we try
-- our hand at some constant-folding.
- -> do args' <- mapM (cmmExprConFold False) args
+ -> do args' <- mapM (cmmExprConFold DataReference) args
return $ cmmMachOpFold mop args'
CmmLit (CmmLabel lbl)
- -> cmmMakeDynamicReference addImportCmmOpt isJumpTarget lbl
+ -> do
+ dflags <- getDynFlagsCmmOpt
+ cmmMakeDynamicReference dflags addImportCmmOpt referenceKind lbl
CmmLit (CmmLabelOff lbl off)
- -> do dynRef <- cmmMakeDynamicReference addImportCmmOpt isJumpTarget lbl
+ -> do
+ dflags <- getDynFlagsCmmOpt
+ dynRef <- cmmMakeDynamicReference dflags addImportCmmOpt referenceKind lbl
return $ cmmMachOpFold (MO_Add wordRep) [
dynRef,
(CmmLit $ CmmInt (fromIntegral off) wordRep)
-- with the corresponding labels:
CmmReg (CmmGlobal GCEnter1)
| not opt_PIC
- -> cmmExprConFold isJumpTarget $
+ -> cmmExprConFold referenceKind $
CmmLit (CmmLabel (mkRtsCodeLabel SLIT( "__stg_gc_enter_1")))
CmmReg (CmmGlobal GCFun)
| not opt_PIC
- -> cmmExprConFold isJumpTarget $
+ -> cmmExprConFold referenceKind $
CmmLit (CmmLabel (mkRtsCodeLabel SLIT( "__stg_gc_fun")))
#endif
Left realreg -> return expr
Right baseRegAddr
-> case mid of
- BaseReg -> cmmExprConFold False baseRegAddr
- other -> cmmExprConFold False (CmmLoad baseRegAddr
- (globalRegRep mid))
+ BaseReg -> cmmExprConFold DataReference baseRegAddr
+ other -> cmmExprConFold DataReference
+ (CmmLoad baseRegAddr (globalRegRep mid))
-- eliminate zero offsets
CmmRegOff reg 0
- -> cmmExprConFold False (CmmReg reg)
+ -> cmmExprConFold referenceKind (CmmReg reg)
CmmRegOff (CmmGlobal mid) offset
-- RegOf leaves are just a shorthand form. If the reg maps
-> case get_GlobalReg_reg_or_addr mid of
Left realreg -> return expr
Right baseRegAddr
- -> cmmExprConFold False (CmmMachOp (MO_Add wordRep) [
+ -> cmmExprConFold DataReference (CmmMachOp (MO_Add wordRep) [
CmmReg (CmmGlobal mid),
CmmLit (CmmInt (fromIntegral offset)
wordRep)])