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-- -----------------------------------------------------------------------------
-- | This is the top-level module in the LLVM code generator.
--
module LlvmCodeGen ( llvmCodeGen ) where
#include "HsVersions.h"
import LlvmCodeGen.Base
import LlvmCodeGen.CodeGen
import LlvmCodeGen.Data
import LlvmCodeGen.Ppr
import Cmm
import CgUtils ( fixStgRegisters )
import PprCmm
import BufWrite
import DynFlags
import ErrUtils
import Outputable
import qualified Pretty as Prt
import UniqSupply
import System.IO
-- -----------------------------------------------------------------------------
-- | Top-level of the llvm codegen
--
llvmCodeGen :: DynFlags -> Handle -> UniqSupply -> [RawCmm] -> IO ()
llvmCodeGen dflags h us cmms
= do
let cmm = concat $ map extractRawCmm cmms
bufh <- newBufHandle h
Prt.bufLeftRender bufh $ pprLlvmHeader
env <- cmmDataLlvmGens dflags bufh cmm
cmmProcLlvmGens dflags bufh us env cmm
bFlush bufh
return ()
where extractRawCmm (Cmm tops) = tops
-- -----------------------------------------------------------------------------
-- | Do llvm code generation on all these cmms data sections.
--
cmmDataLlvmGens
:: DynFlags
-> BufHandle
-> [RawCmmTop]
-> IO ( LlvmEnv )
cmmDataLlvmGens _ _ []
= return ( initLlvmEnv )
cmmDataLlvmGens dflags h cmm =
let exData (CmmData s d) = [(s,d)]
exData _ = []
exProclbl (CmmProc _ l _ _) = [(strCLabel_llvm l)]
exProclbl _ = []
cdata = concat $ map exData cmm
-- put the functions into the enviornment
cproc = concat $ map exProclbl cmm
env = foldl (\e l -> funInsert l llvmFunTy e) initLlvmEnv cproc
in cmmDataLlvmGens' dflags h env cdata []
cmmDataLlvmGens'
:: DynFlags
-> BufHandle
-> LlvmEnv
-> [(Section, [CmmStatic])]
-> [LlvmUnresData]
-> IO ( LlvmEnv )
cmmDataLlvmGens' dflags h env [] lmdata
= do
let (env', lmdata') = resolveLlvmDatas dflags env lmdata []
let lmdoc = Prt.vcat $ map (pprLlvmData dflags) lmdata'
dumpIfSet_dyn dflags Opt_D_dump_llvm "LLVM Code" $ docToSDoc lmdoc
Prt.bufLeftRender h lmdoc
return env'
cmmDataLlvmGens' dflags h env (cmm:cmms) lmdata
= do
let lmdata'@(l, ty, _) = genLlvmData dflags cmm
let env' = funInsert (strCLabel_llvm l) ty env
cmmDataLlvmGens' dflags h env' cmms (lmdata ++ [lmdata'])
-- -----------------------------------------------------------------------------
-- | Do llvm code generation on all these cmms procs.
--
cmmProcLlvmGens
:: DynFlags
-> BufHandle
-> UniqSupply
-> LlvmEnv
-> [RawCmmTop]
-> IO ()
cmmProcLlvmGens _ _ _ _ []
= return ()
cmmProcLlvmGens dflags h us env (cmm : cmms)
= do
(us', env', llvm) <- cmmLlvmGen dflags us (clearVars env) cmm
Prt.bufLeftRender h $ Prt.vcat $ map (pprLlvmCmmTop dflags) llvm
cmmProcLlvmGens dflags h us' env' cmms
-- | Complete llvm code generation phase for a single top-level chunk of Cmm.
cmmLlvmGen
:: DynFlags
-> UniqSupply
-> LlvmEnv
-> RawCmmTop -- ^ the cmm to generate code for
-> IO ( UniqSupply,
LlvmEnv,
[LlvmCmmTop] ) -- llvm code
cmmLlvmGen dflags us env cmm
= do
-- rewrite assignments to global regs
let fixed_cmm = fixStgRegisters cmm
dumpIfSet_dyn dflags Opt_D_dump_opt_cmm "Optimised Cmm"
(pprCmm $ Cmm [fixed_cmm])
-- generate llvm code from cmm
let ((env', llvmBC), usGen) = initUs us $ genLlvmCode dflags env fixed_cmm
dumpIfSet_dyn dflags Opt_D_dump_llvm "LLVM Code"
(vcat $ map (docToSDoc . pprLlvmCmmTop dflags) llvmBC)
return (usGen, env', llvmBC)
-- -----------------------------------------------------------------------------
-- | Instruction selection
--
genLlvmCode
:: DynFlags
-> LlvmEnv
-> RawCmmTop
-> UniqSM (LlvmEnv, [LlvmCmmTop])
genLlvmCode _ env (CmmData _ _)
= return (env, [])
genLlvmCode _ env (CmmProc _ _ _ (ListGraph []))
= return (env, [])
genLlvmCode _ env cp@(CmmProc _ _ _ _)
= genLlvmProc env cp
|
