#include "nativeGen/NCG.h"
-#if alpha_TARGET_ARCH
-import Alpha.CodeGen
-import Alpha.Regs
-import Alpha.RegInfo
-import Alpha.Instr
-
-#elif i386_TARGET_ARCH || x86_64_TARGET_ARCH
+#if i386_TARGET_ARCH || x86_64_TARGET_ARCH
import X86.CodeGen
import X86.Regs
import X86.Instr
import TargetReg
import Platform
+import Config
import Instruction
import PIC
import Reg
import BlockId
import CgUtils ( fixStgRegisters )
import OldCmm
-import CmmOpt ( cmmMiniInline, cmmMachOpFold )
+import CmmOpt ( cmmEliminateDeadBlocks, cmmMiniInline, cmmMachOpFold )
import OldPprCmm
import CLabel
import DynFlags
import StaticFlags
import Util
-import Config
import Digraph
import qualified Pretty
import Data.Maybe
import Control.Monad
import System.IO
-import Distribution.System
{-
The native-code generator has machine-independent and
, Nothing
, mPprStats)
+ ---- x86fp_kludge. This pass inserts ffree instructions to clear
+ ---- the FPU stack on x86. The x86 ABI requires that the FPU stack
+ ---- is clear, and library functions can return odd results if it
+ ---- isn't.
+ ----
+ ---- NB. must happen before shortcutBranches, because that
+ ---- generates JXX_GBLs which we can't fix up in x86fp_kludge.
+ let kludged =
+#if i386_TARGET_ARCH
+ {-# SCC "x86fp_kludge" #-}
+ map x86fp_kludge alloced
+#else
+ alloced
+#endif
+
+ ---- generate jump tables
+ let tabled =
+ {-# SCC "generateJumpTables" #-}
+ generateJumpTables kludged
+
---- shortcut branches
let shorted =
{-# SCC "shortcutBranches" #-}
- shortcutBranches dflags alloced
+ shortcutBranches dflags tabled
---- sequence blocks
let sequenced =
{-# SCC "sequenceBlocks" #-}
map sequenceTop shorted
- ---- x86fp_kludge
- let kludged =
-#if i386_TARGET_ARCH
- {-# SCC "x86fp_kludge" #-}
- map x86fp_kludge sequenced
-#else
- sequenced
-#endif
-
- ---- expansion of SPARC synthetic instrs
+ ---- expansion of SPARC synthetic instrs
#if sparc_TARGET_ARCH
let expanded =
{-# SCC "sparc_expand" #-}
- map expandTop kludged
+ map expandTop sequenced
dumpIfSet_dyn dflags
Opt_D_dump_asm_expanded "Synthetic instructions expanded"
(vcat $ map (docToSDoc . pprNatCmmTop) expanded)
#else
let expanded =
- kludged
+ sequenced
#endif
return ( usAlloc
-- 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.$$ let compilerIdent = Pretty.text "GHC" Pretty.<+>
Pretty.text cProjectVersion
in Pretty.text ".ident" Pretty.<+>
Pretty.doubleQuotes compilerIdent
-#endif
where
-- Generate "symbol stubs" for all external symbols that might
| otherwise
= Pretty.empty
- doPpr lbl = (lbl, Pretty.render $ pprCLabel lbl astyle)
+ doPpr lbl = (lbl, renderWithStyle (pprCLabel lbl) astyle)
astyle = mkCodeStyle AsmStyle
#endif
-- -----------------------------------------------------------------------------
+-- Generate jump tables
+
+-- Analyzes all native code and generates data sections for all jump
+-- table instructions.
+generateJumpTables
+ :: [NatCmmTop Instr] -> [NatCmmTop Instr]
+generateJumpTables xs = concatMap f xs
+ where f p@(CmmProc _ _ (ListGraph xs)) = p : concatMap g xs
+ f p = [p]
+ g (BasicBlock _ xs) = catMaybes (map generateJumpTableForInstr xs)
+
+-- -----------------------------------------------------------------------------
-- Shortcut branches
shortcutBranches
and position independent refs
(ii) compile a list of imported symbols
-Ideas for other things we could do (ToDo):
+Ideas for other things we could do:
- shortcut jumps-to-jumps
- - eliminate dead code blocks
- simple CSE: if an expr is assigned to a temp, then replace later occs of
that expr with the temp, until the expr is no longer valid (can push through
temp assignments, and certain assigns to mem...)
cmmToCmm :: DynFlags -> RawCmmTop -> (RawCmmTop, [CLabel])
cmmToCmm _ top@(CmmData _ _) = (top, [])
cmmToCmm dflags (CmmProc info lbl (ListGraph blocks)) = runCmmOpt dflags $ do
- blocks' <- mapM cmmBlockConFold (cmmMiniInline blocks)
+ blocks' <- mapM cmmBlockConFold (cmmMiniInline (cmmEliminateDeadBlocks blocks))
return $ CmmProc info lbl (ListGraph blocks')
newtype CmmOptM a = CmmOptM (([CLabel], DynFlags) -> (# a, [CLabel] #))
cmmExprConFold :: ReferenceKind -> CmmExpr -> CmmOptM CmmExpr
-cmmExprConFold referenceKind expr
- = case expr of
+cmmExprConFold referenceKind expr = do
+ dflags <- getDynFlagsCmmOpt
+ let arch = platformArch (targetPlatform dflags)
+ case expr of
CmmLoad addr rep
-> do addr' <- cmmExprConFold DataReference addr
return $ CmmLoad addr' rep
CmmLit (CmmLabel lbl)
-> do
- dflags <- getDynFlagsCmmOpt
cmmMakeDynamicReference dflags addImportCmmOpt referenceKind lbl
CmmLit (CmmLabelOff lbl off)
-> do
- dflags <- getDynFlagsCmmOpt
dynRef <- cmmMakeDynamicReference dflags addImportCmmOpt referenceKind lbl
return $ cmmMachOpFold (MO_Add wordWidth) [
dynRef,
-- to use the register table, so we replace these registers
-- with the corresponding labels:
CmmReg (CmmGlobal EagerBlackholeInfo)
- | cTargetArch == PPC && not opt_PIC
+ | arch == ArchPPC && not opt_PIC
-> cmmExprConFold referenceKind $
CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "__stg_EAGER_BLACKHOLE_info")))
CmmReg (CmmGlobal GCEnter1)
- | cTargetArch == PPC && not opt_PIC
+ | arch == ArchPPC && not opt_PIC
-> cmmExprConFold referenceKind $
CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "__stg_gc_enter_1")))
CmmReg (CmmGlobal GCFun)
- | cTargetArch == PPC && not opt_PIC
+ | arch == ArchPPC && not opt_PIC
-> cmmExprConFold referenceKind $
CmmLit (CmmLabel (mkCmmCodeLabel rtsPackageId (fsLit "__stg_gc_fun")))