1 -- -----------------------------------------------------------------------------
2 -- | This is the top-level module in the LLVM code generator.
5 module LlvmCodeGen ( llvmCodeGen, llvmFixupAsm ) where
7 #include "HsVersions.h"
11 import LlvmCodeGen.Base
12 import LlvmCodeGen.CodeGen
13 import LlvmCodeGen.Data
14 import LlvmCodeGen.Ppr
20 import CgUtils ( fixStgRegisters )
28 import qualified Pretty as Prt
34 -- -----------------------------------------------------------------------------
35 -- | Top-level of the LLVM Code generator
37 llvmCodeGen :: DynFlags -> Handle -> UniqSupply -> [RawCmm] -> IO ()
38 llvmCodeGen dflags h us cmms
40 bufh <- newBufHandle h
42 Prt.bufLeftRender bufh $ pprLlvmHeader
44 env' <- cmmDataLlvmGens dflags bufh env cdata []
45 cmmProcLlvmGens dflags bufh us env' cmm 1 []
51 cmm = concat $ map (\(Cmm top) -> top) cmms
53 (cdata,env) = foldr split ([],initLlvmEnv) cmm
55 split (CmmData s d' ) (d,e) = ((s,d'):d,e)
56 split (CmmProc i l _ _) (d,e) =
57 let lbl = strCLabel_llvm $ if not (null i)
58 then entryLblToInfoLbl l
60 env' = funInsert lbl llvmFunTy e
64 -- -----------------------------------------------------------------------------
65 -- | Do LLVM code generation on all these Cmms data sections.
67 cmmDataLlvmGens :: DynFlags -> BufHandle -> LlvmEnv -> [(Section,[CmmStatic])]
68 -> [LlvmUnresData] -> IO ( LlvmEnv )
70 cmmDataLlvmGens dflags h env [] lmdata
71 = let (env', lmdata') = resolveLlvmDatas env lmdata []
72 lmdoc = Prt.vcat $ map pprLlvmData lmdata'
74 dumpIfSet_dyn dflags Opt_D_dump_llvm "LLVM Code" $ docToSDoc lmdoc
75 Prt.bufLeftRender h lmdoc
78 cmmDataLlvmGens dflags h env (cmm:cmms) lmdata
79 = let lmdata'@(l, _, ty, _) = genLlvmData cmm
80 env' = funInsert (strCLabel_llvm l) ty env
81 in cmmDataLlvmGens dflags h env' cmms (lmdata ++ [lmdata'])
84 -- -----------------------------------------------------------------------------
85 -- | Do LLVM code generation on all these Cmms procs.
87 cmmProcLlvmGens :: DynFlags -> BufHandle -> UniqSupply -> LlvmEnv -> [RawCmmTop]
88 -> Int -- ^ count, used for generating unique subsections
89 -> [LlvmVar] -- ^ info tables that need to be marked as 'used'
92 cmmProcLlvmGens _ _ _ _ [] _ []
95 cmmProcLlvmGens _ h _ _ [] _ ivars
96 = let cast x = LMBitc (LMStaticPointer (pVarLift x)) i8Ptr
97 ty = (LMArray (length ivars) i8Ptr)
98 usedArray = LMStaticArray (map cast ivars) ty
99 lmUsed = (LMGlobalVar (fsLit "llvm.used") ty Appending
100 (Just $ fsLit "llvm.metadata") Nothing False, Just usedArray)
102 Prt.bufLeftRender h $ pprLlvmData ([lmUsed], [])
104 cmmProcLlvmGens dflags h us env (cmm : cmms) count ivars
106 (us', env', llvm) <- cmmLlvmGen dflags us (clearVars env) cmm
108 let (docs, ivar) = mapAndUnzip (pprLlvmCmmTop env' count) llvm
109 Prt.bufLeftRender h $ Prt.vcat docs
111 cmmProcLlvmGens dflags h us' env' cmms (count + 2) (concat ivar ++ ivars)
114 -- | Complete LLVM code generation phase for a single top-level chunk of Cmm.
115 cmmLlvmGen :: DynFlags -> UniqSupply -> LlvmEnv -> RawCmmTop
116 -> IO ( UniqSupply, LlvmEnv, [LlvmCmmTop] )
117 cmmLlvmGen dflags us env cmm
119 -- rewrite assignments to global regs
120 let fixed_cmm = fixStgRegisters cmm
122 dumpIfSet_dyn dflags Opt_D_dump_opt_cmm "Optimised Cmm"
123 (pprCmm $ Cmm [fixed_cmm])
125 -- generate llvm code from cmm
126 let ((env', llvmBC), usGen) = initUs us $ genLlvmProc env fixed_cmm
128 dumpIfSet_dyn dflags Opt_D_dump_llvm "LLVM Code"
129 (vcat $ map (docToSDoc . fst . pprLlvmCmmTop env' 0) llvmBC)
131 return (usGen, env', llvmBC)