2 % (c) The GRASP/AQUA Project, Glasgow University, 1993-1998
4 \section{Code output phase}
7 module CodeOutput( codeOutput, outputForeignStubs ) where
9 #include "HsVersions.h"
11 #ifndef OMIT_NATIVE_CODEGEN
12 import UniqSupply ( mkSplitUniqSupply )
13 import AsmCodeGen ( nativeCodeGen )
17 import IlxGen ( ilxGen )
21 import JavaGen ( javaGen )
22 import OccurAnal ( occurAnalyseBinds )
23 import qualified PrintJava
24 import OccurAnal ( occurAnalyseBinds )
27 import Distribution.Package ( showPackageId )
28 import PprC ( writeCs )
29 import CmmLint ( cmmLint )
31 import DriverState ( getExplicitPackagesAnd, getPackageCIncludes )
32 import DriverUtil ( filenameOf )
33 import FastString ( unpackFS )
37 import ErrUtils ( dumpIfSet_dyn, showPass, ghcExit )
39 import Pretty ( Mode(..), printDoc )
40 import Module ( Module )
41 import ListSetOps ( removeDupsEq )
42 import Maybes ( firstJust )
44 import Directory ( doesFileExist )
49 %************************************************************************
53 %************************************************************************
56 codeOutput :: DynFlags
60 -> [Cmm] -- Compiled C--
61 -> IO (Bool{-stub_h_exists-}, Bool{-stub_c_exists-})
63 codeOutput dflags this_mod foreign_stubs deps flat_abstractC
65 -- You can have C (c_output) or assembly-language (ncg_output),
66 -- but not both. [Allowing for both gives a space leak on
67 -- flat_abstractC. WDP 94/10]
69 -- Dunno if the above comment is still meaningful now. JRS 001024.
71 do { when (dopt Opt_DoCmmLinting dflags) $ do
72 { showPass dflags "CmmLint"
73 ; let lints = map cmmLint flat_abstractC
74 ; case firstJust lints of
75 Just err -> do { printDump err
81 ; showPass dflags "CodeOutput"
82 ; let filenm = dopt_OutName dflags
83 ; stubs_exist <- outputForeignStubs dflags foreign_stubs
84 ; case dopt_HscLang dflags of {
85 HscInterpreted -> return ();
86 HscAsm -> outputAsm dflags filenm flat_abstractC;
87 HscC -> outputC dflags filenm flat_abstractC stubs_exist
91 outputJava dflags filenm mod_name tycons core_binds;
93 panic "Java support not compiled into this ghc";
97 let tycons = typeEnvTyCons type_env in
98 outputIlx dflags filenm mod_name tycons stg_binds;
100 panic "ILX support not compiled into this ghc";
106 doOutput :: String -> (Handle -> IO ()) -> IO ()
107 doOutput filenm io_action = bracket (openFile filenm WriteMode) hClose io_action
111 %************************************************************************
115 %************************************************************************
118 outputC dflags filenm flat_absC
119 (stub_h_exists, _) dependencies foreign_stubs
121 -- figure out which header files to #include in the generated .hc file:
123 -- * extra_includes from packages
124 -- * -#include options from the cmdline and OPTIONS pragmas
125 -- * the _stub.h file, if there is one.
127 let packages = dep_pkgs dependencies
128 pkg_configs <- getExplicitPackagesAnd packages
129 let pkg_names = map (showPackageId.package) pkg_configs
131 c_includes <- getPackageCIncludes pkg_configs
132 let cmdline_includes = cmdlineHcIncludes dflags -- -#include options
135 = case foreign_stubs of
137 ForeignStubs _ _ fdhs _ -> map unpackFS (fst (removeDupsEq fdhs))
138 -- Remove duplicates, because distinct foreign import decls
139 -- may cite the same #include. Order doesn't matter.
141 all_headers = c_includes
142 ++ reverse cmdline_includes
145 let cc_injects = unlines (map mk_include all_headers)
148 '"':_{-"-} -> "#include "++h_file
149 '<':_ -> "#include "++h_file
150 _ -> "#include \""++h_file++"\""
152 doOutput filenm $ \ h -> do
153 hPutStr h ("/* GHC_PACKAGES " ++ unwords pkg_names ++ "\n*/\n")
156 hPutStrLn h ("#include \"" ++ (filenameOf (hscStubHOutName dflags)) ++ "\"")
161 %************************************************************************
163 \subsection{Assembler}
165 %************************************************************************
168 outputAsm dflags filenm flat_absC
170 #ifndef OMIT_NATIVE_CODEGEN
172 = do ncg_uniqs <- mkSplitUniqSupply 'n'
173 ncg_output_d <- _scc_ "NativeCodeGen"
174 nativeCodeGen dflags flat_absC ncg_uniqs
175 dumpIfSet_dyn dflags Opt_D_dump_asm "Asm code" (docToSDoc ncg_output_d)
176 _scc_ "OutputAsm" doOutput filenm $
177 \f -> printDoc LeftMode f ncg_output_d
180 #else /* OMIT_NATIVE_CODEGEN */
182 = pprPanic "This compiler was built without a native code generator"
183 (text "Use -fvia-C instead")
189 %************************************************************************
193 %************************************************************************
197 outputJava dflags filenm mod tycons core_binds
198 = doOutput filenm (\ f -> printForUser f alwaysQualify pp_java)
199 -- User style printing for now to keep indentation
201 occ_anal_binds = occurAnalyseBinds core_binds
202 -- Make sure we have up to date dead-var information
203 java_code = javaGen mod [{- Should be imports-}] tycons occ_anal_binds
204 pp_java = PrintJava.compilationUnit java_code
209 %************************************************************************
213 %************************************************************************
217 outputIlx dflags filename mod tycons stg_binds
218 = doOutput filename (\ f -> printForC f pp_ilx)
220 pp_ilx = ilxGen mod tycons stg_binds
225 %************************************************************************
227 \subsection{Foreign import/export}
229 %************************************************************************
232 outputForeignStubs :: DynFlags -> ForeignStubs
233 -> IO (Bool, -- Header file created
234 Bool) -- C file created
235 outputForeignStubs dflags NoStubs = do
236 -- When compiling External Core files, may need to use stub files from a
237 -- previous compilation
238 hFileExists <- doesFileExist (hscStubHOutName dflags)
239 cFileExists <- doesFileExist (hscStubCOutName dflags)
240 return (hFileExists, cFileExists)
241 outputForeignStubs dflags (ForeignStubs h_code c_code _ _)
243 dumpIfSet_dyn dflags Opt_D_dump_foreign
244 "Foreign export header file" stub_h_output_d
246 -- we need the #includes from the rts package for the stub files
247 rts_pkgs <- getPackageDetails [rtsPackage]
248 let rts_includes = concatMap mk_include (concatMap includes rts_pkgs)
249 mk_include i = "#include \"" ++ i ++ "\"\n"
252 <- outputForeignStubs_help (hscStubHOutName dflags) stub_h_output_w
253 ("#include \"HsFFI.h\"\n" ++ cplusplus_hdr) cplusplus_ftr
255 dumpIfSet_dyn dflags Opt_D_dump_foreign
256 "Foreign export stubs" stub_c_output_d
259 <- outputForeignStubs_help (hscStubCOutName dflags) stub_c_output_w
260 ("#define IN_STG_CODE 0\n" ++
261 "#include \"Rts.h\"\n" ++
265 -- We're adding the default hc_header to the stub file, but this
266 -- isn't really HC code, so we need to define IN_STG_CODE==0 to
267 -- avoid the register variables etc. being enabled.
269 return (stub_h_file_exists, stub_c_file_exists)
271 -- C stubs for "foreign export"ed functions.
272 stub_c_output_d = pprCode CStyle c_code
273 stub_c_output_w = showSDoc stub_c_output_d
275 -- Header file protos for "foreign export"ed functions.
276 stub_h_output_d = pprCode CStyle h_code
277 stub_h_output_w = showSDoc stub_h_output_d
279 cplusplus_hdr = "#ifdef __cplusplus\nextern \"C\" {\n#endif\n"
280 cplusplus_ftr = "#ifdef __cplusplus\n}\n#endif\n"
282 -- Don't use doOutput for dumping the f. export stubs
283 -- since it is more than likely that the stubs file will
284 -- turn out to be empty, in which case no file should be created.
285 outputForeignStubs_help fname "" header footer = return False
286 outputForeignStubs_help fname doc_str header footer
287 = do writeFile fname (header ++ doc_str ++ '\n':footer ++ "\n")