-- ----------------------------------------------------------------------------
-- | Pretty print helpers for the LLVM Code generator.
--
module GHC.CmmToLlvm.Ppr (
        pprLlvmCmmDecl, pprLlvmData, infoSection
    ) where

import GHC.Prelude

import GHC.Llvm
import GHC.CmmToLlvm.Base
import GHC.CmmToLlvm.Data
import GHC.CmmToLlvm.Config

import GHC.Cmm.CLabel
import GHC.Cmm

import GHC.Data.FastString
import GHC.Utils.Outputable
import GHC.Types.Unique

-- ----------------------------------------------------------------------------
-- * Top level
--

-- | Pretty print LLVM data code
pprLlvmData :: IsDoc doc => LlvmCgConfig -> LlvmData -> doc
pprLlvmData :: forall doc. IsDoc doc => LlvmCgConfig -> LlvmData -> doc
pprLlvmData LlvmCgConfig
cfg ([LMGlobal]
globals, [LlvmType]
types) =
    let ppLlvmTys :: LlvmType -> doc
ppLlvmTys (LMAlias    LlvmAlias
a) = Line doc -> doc
forall doc. IsDoc doc => Line doc -> doc
line (Line doc -> doc) -> Line doc -> doc
forall a b. (a -> b) -> a -> b
$ LlvmAlias -> Line doc
forall doc. IsLine doc => LlvmAlias -> doc
ppLlvmAlias LlvmAlias
a
        ppLlvmTys (LMFunction LlvmFunctionDecl
f) = LlvmFunctionDecl -> doc
forall doc. IsDoc doc => LlvmFunctionDecl -> doc
ppLlvmFunctionDecl LlvmFunctionDecl
f
        ppLlvmTys LlvmType
_other         = doc
forall doc. IsOutput doc => doc
empty

        types' :: doc
types'   = [doc] -> doc
forall doc. IsDoc doc => [doc] -> doc
vcat ([doc] -> doc) -> [doc] -> doc
forall a b. (a -> b) -> a -> b
$ (LlvmType -> doc) -> [LlvmType] -> [doc]
forall a b. (a -> b) -> [a] -> [b]
map LlvmType -> doc
forall {doc}. IsDoc doc => LlvmType -> doc
ppLlvmTys [LlvmType]
types
        globals' :: doc
globals' = LlvmCgConfig -> [LMGlobal] -> doc
forall doc. IsDoc doc => LlvmCgConfig -> [LMGlobal] -> doc
ppLlvmGlobals LlvmCgConfig
cfg [LMGlobal]
globals
    in doc
types' doc -> doc -> doc
forall doc. IsDoc doc => doc -> doc -> doc
$$ doc
globals'
{-# SPECIALIZE pprLlvmData :: LlvmCgConfig -> LlvmData -> SDoc #-}
{-# SPECIALIZE pprLlvmData :: LlvmCgConfig -> LlvmData -> HDoc #-} -- see Note [SPECIALIZE to HDoc] in GHC.Utils.Outputable


-- | Pretty print LLVM code
-- The HDoc we return is used to produce the final LLVM file, with the
-- SDoc being returned alongside for use when @Opt_D_dump_llvm@ is set
-- as we can't (currently) dump HDocs.
pprLlvmCmmDecl :: LlvmCmmDecl -> LlvmM (HDoc, SDoc)
pprLlvmCmmDecl :: LlvmCmmDecl -> LlvmM (HDoc, SDoc)
pprLlvmCmmDecl (CmmData Section
_ [LlvmData]
lmdata) = do
  opts <- LlvmM LlvmCgConfig
getConfig
  return ( vcat $ map (pprLlvmData opts) lmdata
         , vcat $ map (pprLlvmData opts) lmdata)

pprLlvmCmmDecl (CmmProc Maybe RawCmmStatics
mb_info CLabel
entry_lbl [GlobalReg]
live (ListGraph [GenBasicBlock LlvmStatement]
blks))
  = do let lbl :: CLabel
lbl = case Maybe RawCmmStatics
mb_info of
                     Maybe RawCmmStatics
Nothing -> CLabel
entry_lbl
                     Just (CmmStaticsRaw CLabel
info_lbl [CmmStatic]
_) -> CLabel
info_lbl
           link :: LlvmLinkageType
link = if CLabel -> Bool
externallyVisibleCLabel CLabel
lbl
                      then LlvmLinkageType
ExternallyVisible
                      else LlvmLinkageType
Internal
           lmblocks :: [LlvmBlock]
lmblocks = (GenBasicBlock LlvmStatement -> LlvmBlock)
-> [GenBasicBlock LlvmStatement] -> [LlvmBlock]
forall a b. (a -> b) -> [a] -> [b]
map (\(BasicBlock BlockId
id [LlvmStatement]
stmts) ->
                                LlvmBlockId -> [LlvmStatement] -> LlvmBlock
LlvmBlock (BlockId -> LlvmBlockId
forall a. Uniquable a => a -> LlvmBlockId
getUnique BlockId
id) [LlvmStatement]
stmts) [GenBasicBlock LlvmStatement]
blks

       funDec   <- [GlobalReg] -> CLabel -> LlvmLinkageType -> LlvmM LlvmFunctionDecl
llvmFunSig [GlobalReg]
live CLabel
lbl LlvmLinkageType
link
       cfg      <- getConfig
       platform <- getPlatform
       let buildArg = String -> FastString
fsLit (String -> FastString)
-> (LlvmVar -> String) -> LlvmVar -> FastString
forall b c a. (b -> c) -> (a -> b) -> a -> c
. SDocContext -> SDoc -> String
showSDocOneLine (LlvmCgConfig -> SDocContext
llvmCgContext LlvmCgConfig
cfg)(SDoc -> String) -> (LlvmVar -> SDoc) -> LlvmVar -> String
forall b c a. (b -> c) -> (a -> b) -> a -> c
. LlvmCgConfig -> LlvmVar -> SDoc
forall doc. IsLine doc => LlvmCgConfig -> LlvmVar -> doc
ppPlainName LlvmCgConfig
cfg
           funArgs = (LlvmVar -> FastString) -> [LlvmVar] -> [FastString]
forall a b. (a -> b) -> [a] -> [b]
map LlvmVar -> FastString
buildArg (Platform -> [GlobalReg] -> [LlvmVar]
llvmFunArgs Platform
platform [GlobalReg]
live)
           funSect = LlvmCgConfig -> FastString -> LMSection
llvmFunSection LlvmCgConfig
cfg (LlvmFunctionDecl -> FastString
decName LlvmFunctionDecl
funDec)

       -- generate the info table
       prefix <- case mb_info of
                     Maybe RawCmmStatics
Nothing -> Maybe LlvmStatic -> LlvmM (Maybe LlvmStatic)
forall a. a -> LlvmM a
forall (m :: * -> *) a. Monad m => a -> m a
return Maybe LlvmStatic
forall a. Maybe a
Nothing
                     Just (CmmStaticsRaw CLabel
_ [CmmStatic]
statics) -> do
                       infoStatics <- (CmmStatic -> LlvmM LlvmStatic)
-> [CmmStatic] -> LlvmM [LlvmStatic]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
forall (m :: * -> *) a b. Monad m => (a -> m b) -> [a] -> m [b]
mapM CmmStatic -> LlvmM LlvmStatic
genData [CmmStatic]
statics
                       let infoTy = [LlvmType] -> LlvmType
LMStruct ([LlvmType] -> LlvmType) -> [LlvmType] -> LlvmType
forall a b. (a -> b) -> a -> b
$ (LlvmStatic -> LlvmType) -> [LlvmStatic] -> [LlvmType]
forall a b. (a -> b) -> [a] -> [b]
map LlvmStatic -> LlvmType
getStatType [LlvmStatic]
infoStatics
                       return $ Just $ LMStaticStruc infoStatics infoTy


       let fun = LlvmFunctionDecl
-> [FastString]
-> [LlvmFuncAttr]
-> LMSection
-> Maybe LlvmStatic
-> [LlvmBlock]
-> LlvmFunction
LlvmFunction LlvmFunctionDecl
funDec [FastString]
funArgs [LlvmFuncAttr]
llvmStdFunAttrs LMSection
funSect
                              Maybe LlvmStatic
prefix [LlvmBlock]
lmblocks
           name = LlvmFunctionDecl -> FastString
decName (LlvmFunctionDecl -> FastString) -> LlvmFunctionDecl -> FastString
forall a b. (a -> b) -> a -> b
$ LlvmFunction -> LlvmFunctionDecl
funcDecl LlvmFunction
fun
           defName = FastString -> FastString
llvmDefLabel FastString
name
           funcDecl' = (LlvmFunction -> LlvmFunctionDecl
funcDecl LlvmFunction
fun) { decName = defName }
           fun' = LlvmFunction
fun { funcDecl = funcDecl' }
           funTy = LlvmFunctionDecl -> LlvmType
LMFunction LlvmFunctionDecl
funcDecl'
           funVar = FastString
-> LlvmType
-> LlvmLinkageType
-> LMSection
-> LMAlign
-> LMConst
-> LlvmVar
LMGlobalVar FastString
name
                                (LlvmType -> LlvmType
LMPointer LlvmType
funTy)
                                LlvmLinkageType
link
                                LMSection
forall a. Maybe a
Nothing
                                LMAlign
forall a. Maybe a
Nothing
                                LMConst
Alias
           defVar = FastString
-> LlvmType
-> LlvmLinkageType
-> LMSection
-> LMAlign
-> LMConst
-> LlvmVar
LMGlobalVar FastString
defName
                                (LlvmType -> LlvmType
LMPointer LlvmType
funTy)
                                (LlvmFunctionDecl -> LlvmLinkageType
funcLinkage LlvmFunctionDecl
funcDecl')
                                (LlvmFunction -> LMSection
funcSect LlvmFunction
fun)
                                (LlvmFunctionDecl -> LMAlign
funcAlign LlvmFunctionDecl
funcDecl')
                                LMConst
Alias
           alias = LlvmVar -> Maybe LlvmStatic -> LMGlobal
LMGlobal LlvmVar
funVar
                            (LlvmStatic -> Maybe LlvmStatic
forall a. a -> Maybe a
Just (LlvmStatic -> Maybe LlvmStatic) -> LlvmStatic -> Maybe LlvmStatic
forall a b. (a -> b) -> a -> b
$ LlvmStatic -> LlvmType -> LlvmStatic
LMBitc (LlvmVar -> LlvmStatic
LMStaticPointer LlvmVar
defVar)
                                           LlvmType
i8Ptr)

       return ( vcat [line $ ppLlvmGlobal cfg alias, ppLlvmFunction cfg fun']
              , vcat [line $ ppLlvmGlobal cfg alias, ppLlvmFunction cfg fun'])


-- | The section we are putting info tables and their entry code into, should
-- be unique since we process the assembly pattern matching this.
infoSection :: String
infoSection :: String
infoSection = String
"X98A__STRIP,__me"