diff options
Diffstat (limited to 'compiler/GHC/Driver/Backend.hs')
| -rw-r--r-- | compiler/GHC/Driver/Backend.hs | 305 |
1 files changed, 182 insertions, 123 deletions
diff --git a/compiler/GHC/Driver/Backend.hs b/compiler/GHC/Driver/Backend.hs index 776e5eb675..b02d5c76f4 100644 --- a/compiler/GHC/Driver/Backend.hs +++ b/compiler/GHC/Driver/Backend.hs @@ -45,6 +45,7 @@ module GHC.Driver.Backend -- * Available back ends , ncgBackend , llvmBackend + , jsBackend , viaCBackend , interpreterBackend , noBackend @@ -96,6 +97,7 @@ module GHC.Driver.Backend , backendAssemblerInfoGetter , backendCDefs , backendCodeOutput + , backendUseJSLinker , backendPostHscPipeline , backendNormalSuccessorPhase , backendName @@ -193,12 +195,11 @@ import GHC.Platform --------------------------------------------------------------------------------- - - platformDefaultBackend :: Platform -> Backend platformDefaultBackend platform = if | platformUnregisterised platform -> viaCBackend | platformNcgSupported platform -> ncgBackend + | platformJSSupported platform -> jsBackend | otherwise -> llvmBackend -- | Is the platform supported by the Native Code Generator? @@ -217,6 +218,11 @@ platformNcgSupported platform = if ArchWasm32 -> True _ -> False +-- | Is the platform supported by the JS backend? +platformJSSupported :: Platform -> Bool +platformJSSupported platform + | platformArch platform == ArchJavaScript = True + | otherwise = False -- | A value of type @Backend@ represents one of GHC's back ends. @@ -247,7 +253,7 @@ instance Show Backend where show = backendDescription -ncgBackend, llvmBackend, viaCBackend, interpreterBackend, noBackend +ncgBackend, llvmBackend, viaCBackend, interpreterBackend, jsBackend, noBackend :: Backend -- | The native code generator. @@ -274,6 +280,11 @@ ncgBackend = Named NCG -- See "GHC.CmmToLlvm" llvmBackend = Named LLVM +-- | The JavaScript Backend +-- +-- See documentation in GHC.StgToJS +jsBackend = Named JavaScript + -- | Via-C ("unregisterised") backend. -- -- Compiles Cmm code into C code, then relies on a C compiler @@ -329,8 +340,9 @@ noBackend = Named NoBackend -- it without mutual recursion across module boundaries.) data PrimitiveImplementation - = LlvmPrimitives -- ^ Primitives supported by LLVM - | NcgPrimitives -- ^ Primitives supported by the native code generator + = LlvmPrimitives -- ^ Primitives supported by LLVM + | NcgPrimitives -- ^ Primitives supported by the native code generator + | JSPrimitives -- ^ Primitives supported by JS backend | GenericPrimitives -- ^ Primitives supported by all back ends deriving Show @@ -344,6 +356,8 @@ data PrimitiveImplementation data DefunctionalizedAssemblerProg = StandardAssemblerProg -- ^ Use the standard system assembler + | JSAssemblerProg + -- ^ JS Backend compile to JS via Stg, and so does not use any assembler | DarwinClangAssemblerProg -- ^ If running on Darwin, use the assembler from the @clang@ -- toolchain. Otherwise use the standard system assembler. @@ -360,6 +374,8 @@ data DefunctionalizedAssemblerProg data DefunctionalizedAssemblerInfoGetter = StandardAssemblerInfoGetter -- ^ Interrogate the standard system assembler + | JSAssemblerInfoGetter + -- ^ If using the JS backend; return 'Emscripten' | DarwinClangAssemblerInfoGetter -- ^ If running on Darwin, return `Clang`; otherwise -- interrogate the standard system assembler. @@ -387,6 +403,7 @@ data DefunctionalizedCodeOutput = NcgCodeOutput | ViaCCodeOutput | LlvmCodeOutput + | JSCodeOutput -- | Names a function that tells the driver what should happen after @@ -407,6 +424,7 @@ data DefunctionalizedPostHscPipeline = NcgPostHscPipeline | ViaCPostHscPipeline | LlvmPostHscPipeline + | JSPostHscPipeline | NoPostHscPipeline -- ^ After code generation, nothing else need happen. -- | Names a function that tells the driver what command-line options @@ -432,42 +450,46 @@ data DefunctionalizedCDefs -- issuing warning messages /only/. If code depends on -- what's in the string, you deserve what happens to you. backendDescription :: Backend -> String -backendDescription (Named NCG) = "native code generator" -backendDescription (Named LLVM) = "LLVM" -backendDescription (Named ViaC) = "compiling via C" +backendDescription (Named NCG) = "native code generator" +backendDescription (Named LLVM) = "LLVM" +backendDescription (Named ViaC) = "compiling via C" +backendDescription (Named JavaScript) = "compiling to JavaScript" backendDescription (Named Interpreter) = "byte-code interpreter" -backendDescription (Named NoBackend) = "no code generated" +backendDescription (Named NoBackend) = "no code generated" -- | This flag tells the compiler driver whether the back -- end will write files: interface files and object files. -- It is typically true for "real" back ends that generate -- code into the filesystem. (That means, not the interpreter.) backendWritesFiles :: Backend -> Bool -backendWritesFiles (Named NCG) = True -backendWritesFiles (Named LLVM) = True -backendWritesFiles (Named ViaC) = True +backendWritesFiles (Named NCG) = True +backendWritesFiles (Named LLVM) = True +backendWritesFiles (Named ViaC) = True +backendWritesFiles (Named JavaScript) = True backendWritesFiles (Named Interpreter) = False -backendWritesFiles (Named NoBackend) = False +backendWritesFiles (Named NoBackend) = False -- | When the back end does write files, this value tells -- the compiler in what manner of file the output should go: -- temporary, persistent, or specific. backendPipelineOutput :: Backend -> PipelineOutput -backendPipelineOutput (Named NCG) = Persistent +backendPipelineOutput (Named NCG) = Persistent backendPipelineOutput (Named LLVM) = Persistent backendPipelineOutput (Named ViaC) = Persistent +backendPipelineOutput (Named JavaScript) = Persistent backendPipelineOutput (Named Interpreter) = NoOutputFile -backendPipelineOutput (Named NoBackend) = NoOutputFile +backendPipelineOutput (Named NoBackend) = NoOutputFile -- | This flag tells the driver whether the back end can -- reuse code (bytecode or object code) that has been -- loaded dynamically. Likely true only of the interpreter. backendCanReuseLoadedCode :: Backend -> Bool -backendCanReuseLoadedCode (Named NCG) = False -backendCanReuseLoadedCode (Named LLVM) = False -backendCanReuseLoadedCode (Named ViaC) = False +backendCanReuseLoadedCode (Named NCG) = False +backendCanReuseLoadedCode (Named LLVM) = False +backendCanReuseLoadedCode (Named ViaC) = False +backendCanReuseLoadedCode (Named JavaScript) = False backendCanReuseLoadedCode (Named Interpreter) = True -backendCanReuseLoadedCode (Named NoBackend) = False +backendCanReuseLoadedCode (Named NoBackend) = False -- | It is is true of every back end except @-fno-code@ -- that it "generates code." Surprisingly, this property @@ -487,33 +509,36 @@ backendCanReuseLoadedCode (Named NoBackend) = False -- to date). -- backendGeneratesCode :: Backend -> Bool -backendGeneratesCode (Named NCG) = True -backendGeneratesCode (Named LLVM) = True -backendGeneratesCode (Named ViaC) = True +backendGeneratesCode (Named NCG) = True +backendGeneratesCode (Named LLVM) = True +backendGeneratesCode (Named ViaC) = True +backendGeneratesCode (Named JavaScript) = True backendGeneratesCode (Named Interpreter) = True -backendGeneratesCode (Named NoBackend) = False +backendGeneratesCode (Named NoBackend) = False -- | When set, this flag turns on interface writing for -- Backpack. It should probably be the same as -- `backendGeneratesCode`, but it is kept distinct for -- reasons described in Note [-fno-code mode]. backendSupportsInterfaceWriting :: Backend -> Bool -backendSupportsInterfaceWriting (Named NCG) = True -backendSupportsInterfaceWriting (Named LLVM) = True -backendSupportsInterfaceWriting (Named ViaC) = True +backendSupportsInterfaceWriting (Named NCG) = True +backendSupportsInterfaceWriting (Named LLVM) = True +backendSupportsInterfaceWriting (Named ViaC) = True +backendSupportsInterfaceWriting (Named JavaScript) = True backendSupportsInterfaceWriting (Named Interpreter) = True -backendSupportsInterfaceWriting (Named NoBackend) = False +backendSupportsInterfaceWriting (Named NoBackend) = False -- | When preparing code for this back end, the type -- checker should pay attention to SPECIALISE pragmas. If -- this flag is `False`, then the type checker ignores -- SPECIALISE pragmas (for imported things?). backendRespectsSpecialise :: Backend -> Bool -backendRespectsSpecialise (Named NCG) = True -backendRespectsSpecialise (Named LLVM) = True -backendRespectsSpecialise (Named ViaC) = True +backendRespectsSpecialise (Named NCG) = True +backendRespectsSpecialise (Named LLVM) = True +backendRespectsSpecialise (Named ViaC) = True +backendRespectsSpecialise (Named JavaScript) = True backendRespectsSpecialise (Named Interpreter) = False -backendRespectsSpecialise (Named NoBackend) = False +backendRespectsSpecialise (Named NoBackend) = False -- | This back end wants the `mi_globals` field of a -- `ModIface` to be populated (with the top-level bindings @@ -522,11 +547,12 @@ backendRespectsSpecialise (Named NoBackend) = False -- (After typechecking a module, Haddock wants access to -- the module's `GlobalRdrEnv`.) backendWantsGlobalBindings :: Backend -> Bool -backendWantsGlobalBindings (Named NCG) = False -backendWantsGlobalBindings (Named LLVM) = False -backendWantsGlobalBindings (Named ViaC) = False +backendWantsGlobalBindings (Named NCG) = False +backendWantsGlobalBindings (Named LLVM) = False +backendWantsGlobalBindings (Named ViaC) = False +backendWantsGlobalBindings (Named JavaScript) = False backendWantsGlobalBindings (Named Interpreter) = True -backendWantsGlobalBindings (Named NoBackend) = True +backendWantsGlobalBindings (Named NoBackend) = True -- | The back end targets a technology that implements -- `switch` natively. (For example, LLVM or C.) Therefore @@ -534,11 +560,12 @@ backendWantsGlobalBindings (Named NoBackend) = True -- form into a decision tree with jump tables at the -- leaves. backendHasNativeSwitch :: Backend -> Bool -backendHasNativeSwitch (Named NCG) = False -backendHasNativeSwitch (Named LLVM) = True -backendHasNativeSwitch (Named ViaC) = True +backendHasNativeSwitch (Named NCG) = False +backendHasNativeSwitch (Named LLVM) = True +backendHasNativeSwitch (Named ViaC) = True +backendHasNativeSwitch (Named JavaScript) = True backendHasNativeSwitch (Named Interpreter) = False -backendHasNativeSwitch (Named NoBackend) = False +backendHasNativeSwitch (Named NoBackend) = False -- | As noted in the documentation for -- `PrimitiveImplementation`, certain primitives have @@ -547,32 +574,35 @@ backendHasNativeSwitch (Named NoBackend) = False -- "GHC.StgToCmm.Prim" what implementations to use with -- this back end. backendPrimitiveImplementation :: Backend -> PrimitiveImplementation -backendPrimitiveImplementation (Named NCG) = NcgPrimitives -backendPrimitiveImplementation (Named LLVM) = LlvmPrimitives -backendPrimitiveImplementation (Named ViaC) = GenericPrimitives +backendPrimitiveImplementation (Named NCG) = NcgPrimitives +backendPrimitiveImplementation (Named LLVM) = LlvmPrimitives +backendPrimitiveImplementation (Named JavaScript) = JSPrimitives +backendPrimitiveImplementation (Named ViaC) = GenericPrimitives backendPrimitiveImplementation (Named Interpreter) = GenericPrimitives -backendPrimitiveImplementation (Named NoBackend) = GenericPrimitives +backendPrimitiveImplementation (Named NoBackend) = GenericPrimitives -- | When this value is `IsValid`, the back end is -- compatible with vector instructions. When it is -- `NotValid`, it carries a message that is shown to -- users. backendSimdValidity :: Backend -> Validity' String -backendSimdValidity (Named NCG) = NotValid $ unlines ["SIMD vector instructions require the LLVM back-end.","Please use -fllvm."] -backendSimdValidity (Named LLVM) = IsValid -backendSimdValidity (Named ViaC) = NotValid $ unlines ["SIMD vector instructions require the LLVM back-end.","Please use -fllvm."] +backendSimdValidity (Named NCG) = NotValid $ unlines ["SIMD vector instructions require the LLVM back-end.","Please use -fllvm."] +backendSimdValidity (Named LLVM) = IsValid +backendSimdValidity (Named ViaC) = NotValid $ unlines ["SIMD vector instructions require the LLVM back-end.","Please use -fllvm."] +backendSimdValidity (Named JavaScript) = NotValid $ unlines ["SIMD vector instructions require the LLVM back-end.","Please use -fllvm."] backendSimdValidity (Named Interpreter) = NotValid $ unlines ["SIMD vector instructions require the LLVM back-end.","Please use -fllvm."] -backendSimdValidity (Named NoBackend) = NotValid $ unlines ["SIMD vector instructions require the LLVM back-end.","Please use -fllvm."] +backendSimdValidity (Named NoBackend) = NotValid $ unlines ["SIMD vector instructions require the LLVM back-end.","Please use -fllvm."] -- | This flag says whether the back end supports large -- binary blobs. See Note [Embedding large binary blobs] -- in "GHC.CmmToAsm.Ppr". backendSupportsEmbeddedBlobs :: Backend -> Bool -backendSupportsEmbeddedBlobs (Named NCG) = True -backendSupportsEmbeddedBlobs (Named LLVM) = False -backendSupportsEmbeddedBlobs (Named ViaC) = False +backendSupportsEmbeddedBlobs (Named NCG) = True +backendSupportsEmbeddedBlobs (Named LLVM) = False +backendSupportsEmbeddedBlobs (Named ViaC) = False +backendSupportsEmbeddedBlobs (Named JavaScript) = False backendSupportsEmbeddedBlobs (Named Interpreter) = False -backendSupportsEmbeddedBlobs (Named NoBackend) = False +backendSupportsEmbeddedBlobs (Named NoBackend) = False -- | This flag tells the compiler driver that the back end -- does not support every target platform; it supports @@ -582,22 +612,24 @@ backendSupportsEmbeddedBlobs (Named NoBackend) = False -- platform support, the driver fails over to the LLVM -- back end. backendNeedsPlatformNcgSupport :: Backend -> Bool -backendNeedsPlatformNcgSupport (Named NCG) = True -backendNeedsPlatformNcgSupport (Named LLVM) = False -backendNeedsPlatformNcgSupport (Named ViaC) = False +backendNeedsPlatformNcgSupport (Named NCG) = True +backendNeedsPlatformNcgSupport (Named LLVM) = False +backendNeedsPlatformNcgSupport (Named ViaC) = False +backendNeedsPlatformNcgSupport (Named JavaScript) = False backendNeedsPlatformNcgSupport (Named Interpreter) = False -backendNeedsPlatformNcgSupport (Named NoBackend) = False +backendNeedsPlatformNcgSupport (Named NoBackend) = False -- | This flag is set if the back end can generate code -- for proc points. If the flag is not set, then a Cmm -- pass needs to split proc points (that is, turn each -- proc point into a standalone procedure). backendSupportsUnsplitProcPoints :: Backend -> Bool -backendSupportsUnsplitProcPoints (Named NCG) = True -backendSupportsUnsplitProcPoints (Named LLVM) = False -backendSupportsUnsplitProcPoints (Named ViaC) = False +backendSupportsUnsplitProcPoints (Named NCG) = True +backendSupportsUnsplitProcPoints (Named LLVM) = False +backendSupportsUnsplitProcPoints (Named ViaC) = False +backendSupportsUnsplitProcPoints (Named JavaScript) = False backendSupportsUnsplitProcPoints (Named Interpreter) = False -backendSupportsUnsplitProcPoints (Named NoBackend) = False +backendSupportsUnsplitProcPoints (Named NoBackend) = False -- | This flag guides the driver in resolving issues about -- API support on the target platform. If the flag is set, @@ -610,113 +642,124 @@ backendSupportsUnsplitProcPoints (Named NoBackend) = False -- this back end can replace compilation via C. -- backendSwappableWithViaC :: Backend -> Bool -backendSwappableWithViaC (Named NCG) = True -backendSwappableWithViaC (Named LLVM) = True -backendSwappableWithViaC (Named ViaC) = False +backendSwappableWithViaC (Named NCG) = True +backendSwappableWithViaC (Named LLVM) = True +backendSwappableWithViaC (Named ViaC) = False +backendSwappableWithViaC (Named JavaScript) = False backendSwappableWithViaC (Named Interpreter) = False -backendSwappableWithViaC (Named NoBackend) = False +backendSwappableWithViaC (Named NoBackend) = False -- | This flag is true if the back end works *only* with -- the unregisterised ABI. backendUnregisterisedAbiOnly :: Backend -> Bool -backendUnregisterisedAbiOnly (Named NCG) = False -backendUnregisterisedAbiOnly (Named LLVM) = False -backendUnregisterisedAbiOnly (Named ViaC) = True +backendUnregisterisedAbiOnly (Named NCG) = False +backendUnregisterisedAbiOnly (Named LLVM) = False +backendUnregisterisedAbiOnly (Named ViaC) = True +backendUnregisterisedAbiOnly (Named JavaScript) = False backendUnregisterisedAbiOnly (Named Interpreter) = False -backendUnregisterisedAbiOnly (Named NoBackend) = False +backendUnregisterisedAbiOnly (Named NoBackend) = False -- | This flag is set if the back end generates C code in -- a @.hc@ file. The flag lets the compiler driver know -- if the command-line flag @-C@ is meaningful. backendGeneratesHc :: Backend -> Bool -backendGeneratesHc (Named NCG) = False -backendGeneratesHc (Named LLVM) = False -backendGeneratesHc (Named ViaC) = True +backendGeneratesHc (Named NCG) = False +backendGeneratesHc (Named LLVM) = False +backendGeneratesHc (Named ViaC) = True +backendGeneratesHc (Named JavaScript) = False backendGeneratesHc (Named Interpreter) = False -backendGeneratesHc (Named NoBackend) = False +backendGeneratesHc (Named NoBackend) = False -- | This flag says whether SPT (static pointer table) -- entries will be inserted dynamically if needed. If -- this flag is `False`, then "GHC.Iface.Tidy" should emit C -- stubs that initialize the SPT entries. backendSptIsDynamic :: Backend -> Bool -backendSptIsDynamic (Named NCG) = False -backendSptIsDynamic (Named LLVM) = False -backendSptIsDynamic (Named ViaC) = False +backendSptIsDynamic (Named NCG) = False +backendSptIsDynamic (Named LLVM) = False +backendSptIsDynamic (Named ViaC) = False +backendSptIsDynamic (Named JavaScript) = False backendSptIsDynamic (Named Interpreter) = True -backendSptIsDynamic (Named NoBackend) = False +backendSptIsDynamic (Named NoBackend) = False -- | If this flag is set, then "GHC.HsToCore.Ticks" -- inserts `Breakpoint` ticks. Used only for the -- interpreter. backendWantsBreakpointTicks :: Backend -> Bool -backendWantsBreakpointTicks (Named NCG) = False -backendWantsBreakpointTicks (Named LLVM) = False -backendWantsBreakpointTicks (Named ViaC) = False +backendWantsBreakpointTicks (Named NCG) = False +backendWantsBreakpointTicks (Named LLVM) = False +backendWantsBreakpointTicks (Named ViaC) = False +backendWantsBreakpointTicks (Named JavaScript) = False backendWantsBreakpointTicks (Named Interpreter) = True -backendWantsBreakpointTicks (Named NoBackend) = False +backendWantsBreakpointTicks (Named NoBackend) = False -- | If this flag is set, then the driver forces the -- optimization level to 0, issuing a warning message if -- the command line requested a higher optimization level. backendForcesOptimization0 :: Backend -> Bool -backendForcesOptimization0 (Named NCG) = False -backendForcesOptimization0 (Named LLVM) = False -backendForcesOptimization0 (Named ViaC) = False +backendForcesOptimization0 (Named NCG) = False +backendForcesOptimization0 (Named LLVM) = False +backendForcesOptimization0 (Named ViaC) = False +backendForcesOptimization0 (Named JavaScript) = False backendForcesOptimization0 (Named Interpreter) = True -backendForcesOptimization0 (Named NoBackend) = False +backendForcesOptimization0 (Named NoBackend) = False -- | I don't understand exactly how this works. But if -- this flag is set *and* another condition is met, then -- @ghc/Main.hs@ will alter the `DynFlags` so that all the -- `hostFullWays` are asked for. It is set only for the interpreter. backendNeedsFullWays :: Backend -> Bool -backendNeedsFullWays (Named NCG) = False -backendNeedsFullWays (Named LLVM) = False -backendNeedsFullWays (Named ViaC) = False +backendNeedsFullWays (Named NCG) = False +backendNeedsFullWays (Named LLVM) = False +backendNeedsFullWays (Named ViaC) = False +backendNeedsFullWays (Named JavaScript) = False backendNeedsFullWays (Named Interpreter) = True -backendNeedsFullWays (Named NoBackend) = False +backendNeedsFullWays (Named NoBackend) = False -- | This flag is also special for the interpreter: if a -- message about a module needs to be shown, do we know -- anything special about where the module came from? The -- Boolean argument is a `recomp` flag. backendSpecialModuleSource :: Backend -> Bool -> Maybe String -backendSpecialModuleSource (Named NCG) = const Nothing -backendSpecialModuleSource (Named LLVM) = const Nothing -backendSpecialModuleSource (Named ViaC) = const Nothing +backendSpecialModuleSource (Named NCG) = const Nothing +backendSpecialModuleSource (Named LLVM) = const Nothing +backendSpecialModuleSource (Named ViaC) = const Nothing +backendSpecialModuleSource (Named JavaScript) = const Nothing backendSpecialModuleSource (Named Interpreter) = \b -> if b then Just "interpreted" else Nothing -backendSpecialModuleSource (Named NoBackend) = const (Just "nothing") +backendSpecialModuleSource (Named NoBackend) = const (Just "nothing") -- | This flag says whether the back end supports Haskell -- Program Coverage (HPC). If not, the compiler driver -- will ignore the `-fhpc` option (and will issue a -- warning message if it is used). backendSupportsHpc :: Backend -> Bool -backendSupportsHpc (Named NCG) = True -backendSupportsHpc (Named LLVM) = True -backendSupportsHpc (Named ViaC) = True +backendSupportsHpc (Named NCG) = True +backendSupportsHpc (Named LLVM) = True +backendSupportsHpc (Named ViaC) = True +backendSupportsHpc (Named JavaScript) = False backendSupportsHpc (Named Interpreter) = False -backendSupportsHpc (Named NoBackend) = True +backendSupportsHpc (Named NoBackend) = True -- | This flag says whether the back end supports foreign -- import of C functions. ("Supports" means "does not -- barf on," so @-fno-code@ supports foreign C imports.) backendSupportsCImport :: Backend -> Bool -backendSupportsCImport (Named NCG) = True -backendSupportsCImport (Named LLVM) = True -backendSupportsCImport (Named ViaC) = True +backendSupportsCImport (Named NCG) = True +backendSupportsCImport (Named LLVM) = True +backendSupportsCImport (Named ViaC) = True +backendSupportsCImport (Named JavaScript) = True backendSupportsCImport (Named Interpreter) = True -backendSupportsCImport (Named NoBackend) = True +backendSupportsCImport (Named NoBackend) = True -- | This flag says whether the back end supports foreign -- export of Haskell functions to C. backendSupportsCExport :: Backend -> Bool -backendSupportsCExport (Named NCG) = True -backendSupportsCExport (Named LLVM) = True -backendSupportsCExport (Named ViaC) = True +backendSupportsCExport (Named NCG) = True +backendSupportsCExport (Named LLVM) = True +backendSupportsCExport (Named ViaC) = True +backendSupportsCExport (Named JavaScript) = True backendSupportsCExport (Named Interpreter) = False -backendSupportsCExport (Named NoBackend) = True +backendSupportsCExport (Named NoBackend) = True -- | This (defunctionalized) function runs the assembler -- used on the code that is written by this back end. A @@ -731,11 +774,12 @@ backendSupportsCExport (Named NoBackend) = True -- -- This field is usually defaulted. backendAssemblerProg :: Backend -> DefunctionalizedAssemblerProg -backendAssemblerProg (Named NCG) = StandardAssemblerProg +backendAssemblerProg (Named NCG) = StandardAssemblerProg backendAssemblerProg (Named LLVM) = DarwinClangAssemblerProg backendAssemblerProg (Named ViaC) = StandardAssemblerProg +backendAssemblerProg (Named JavaScript) = JSAssemblerProg backendAssemblerProg (Named Interpreter) = StandardAssemblerProg -backendAssemblerProg (Named NoBackend) = StandardAssemblerProg +backendAssemblerProg (Named NoBackend) = StandardAssemblerProg -- | This (defunctionalized) function is used to retrieve -- an enumeration value that characterizes the C/assembler @@ -749,11 +793,12 @@ backendAssemblerProg (Named NoBackend) = StandardAssemblerProg -- -- This field is usually defaulted. backendAssemblerInfoGetter :: Backend -> DefunctionalizedAssemblerInfoGetter -backendAssemblerInfoGetter (Named NCG) = StandardAssemblerInfoGetter -backendAssemblerInfoGetter (Named LLVM) = DarwinClangAssemblerInfoGetter -backendAssemblerInfoGetter (Named ViaC) = StandardAssemblerInfoGetter +backendAssemblerInfoGetter (Named NCG) = StandardAssemblerInfoGetter +backendAssemblerInfoGetter (Named LLVM) = DarwinClangAssemblerInfoGetter +backendAssemblerInfoGetter (Named ViaC) = StandardAssemblerInfoGetter +backendAssemblerInfoGetter (Named JavaScript) = JSAssemblerInfoGetter backendAssemblerInfoGetter (Named Interpreter) = StandardAssemblerInfoGetter -backendAssemblerInfoGetter (Named NoBackend) = StandardAssemblerInfoGetter +backendAssemblerInfoGetter (Named NoBackend) = StandardAssemblerInfoGetter -- | When using this back end, it may be necessary or -- advisable to pass some `-D` options to a C compiler. @@ -769,11 +814,12 @@ backendAssemblerInfoGetter (Named NoBackend) = StandardAssemblerInfoGetter -- -- This field is usually defaulted. backendCDefs :: Backend -> DefunctionalizedCDefs -backendCDefs (Named NCG) = NoCDefs -backendCDefs (Named LLVM) = LlvmCDefs -backendCDefs (Named ViaC) = NoCDefs +backendCDefs (Named NCG) = NoCDefs +backendCDefs (Named LLVM) = LlvmCDefs +backendCDefs (Named ViaC) = NoCDefs +backendCDefs (Named JavaScript) = NoCDefs backendCDefs (Named Interpreter) = NoCDefs -backendCDefs (Named NoBackend) = NoCDefs +backendCDefs (Named NoBackend) = NoCDefs -- | This (defunctionalized) function generates code and -- writes it to a file. The type of the function is @@ -787,11 +833,20 @@ backendCDefs (Named NoBackend) = NoCDefs -- > -> Stream IO RawCmmGroup a -- results from `StgToCmm` -- > -> IO a backendCodeOutput :: Backend -> DefunctionalizedCodeOutput -backendCodeOutput (Named NCG) = NcgCodeOutput -backendCodeOutput (Named LLVM) = LlvmCodeOutput -backendCodeOutput (Named ViaC) = ViaCCodeOutput +backendCodeOutput (Named NCG) = NcgCodeOutput +backendCodeOutput (Named LLVM) = LlvmCodeOutput +backendCodeOutput (Named ViaC) = ViaCCodeOutput +backendCodeOutput (Named JavaScript) = JSCodeOutput backendCodeOutput (Named Interpreter) = panic "backendCodeOutput: interpreterBackend" -backendCodeOutput (Named NoBackend) = panic "backendCodeOutput: noBackend" +backendCodeOutput (Named NoBackend) = panic "backendCodeOutput: noBackend" + +backendUseJSLinker :: Backend -> Bool +backendUseJSLinker (Named NCG) = False +backendUseJSLinker (Named LLVM) = False +backendUseJSLinker (Named ViaC) = False +backendUseJSLinker (Named JavaScript) = True +backendUseJSLinker (Named Interpreter) = False +backendUseJSLinker (Named NoBackend) = False -- | This (defunctionalized) function tells the compiler -- driver what else has to be run after code output. @@ -805,9 +860,10 @@ backendCodeOutput (Named NoBackend) = panic "backendCodeOutput: noBackend" -- > -> FilePath -- > -> m (Maybe FilePath) backendPostHscPipeline :: Backend -> DefunctionalizedPostHscPipeline -backendPostHscPipeline (Named NCG) = NcgPostHscPipeline +backendPostHscPipeline (Named NCG) = NcgPostHscPipeline backendPostHscPipeline (Named LLVM) = LlvmPostHscPipeline backendPostHscPipeline (Named ViaC) = ViaCPostHscPipeline +backendPostHscPipeline (Named JavaScript) = JSPostHscPipeline backendPostHscPipeline (Named Interpreter) = NoPostHscPipeline backendPostHscPipeline (Named NoBackend) = NoPostHscPipeline @@ -818,21 +874,23 @@ backendPostHscPipeline (Named NoBackend) = NoPostHscPipeline -- value gives instructions like "run the C compiler", -- "run the assembler," or "run the LLVM Optimizer." backendNormalSuccessorPhase :: Backend -> Phase -backendNormalSuccessorPhase (Named NCG) = As False +backendNormalSuccessorPhase (Named NCG) = As False backendNormalSuccessorPhase (Named LLVM) = LlvmOpt backendNormalSuccessorPhase (Named ViaC) = HCc +backendNormalSuccessorPhase (Named JavaScript) = StopLn backendNormalSuccessorPhase (Named Interpreter) = StopLn -backendNormalSuccessorPhase (Named NoBackend) = StopLn +backendNormalSuccessorPhase (Named NoBackend) = StopLn -- | Name of the back end, if any. Used to migrate legacy -- clients of the GHC API. Code within the GHC source -- tree should not refer to a back end's name. backendName :: Backend -> BackendName -backendName (Named NCG) = NCG +backendName (Named NCG) = NCG backendName (Named LLVM) = LLVM backendName (Named ViaC) = ViaC +backendName (Named JavaScript) = JavaScript backendName (Named Interpreter) = Interpreter -backendName (Named NoBackend) = NoBackend +backendName (Named NoBackend) = NoBackend @@ -843,6 +901,7 @@ allBackends :: [Backend] allBackends = [ ncgBackend , llvmBackend , viaCBackend + , jsBackend , interpreterBackend , noBackend ] @@ -911,7 +970,7 @@ Such a function may be applied in one of two ways: applyCDefs :: DefunctionalizedCDefs -> Logger -> DynFlags -> IO [String] @ - Function `applyCDefs` is defined in module "GHC.Driver.Pipeline.Execute". + Function `applyCDefs` is defined in module "GHC.SysTools.Cpp". I don't love this solution, but defunctionalization is a standard thing, and it makes the meanings of the enumeration values clear. |