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|
module Vectorise.Env (
Scope(..),
-- * Local Environments
LocalEnv(..),
emptyLocalEnv,
-- * Global Environments
GlobalEnv(..),
initGlobalEnv,
extendImportedVarsEnv,
extendScalars,
setFamEnv,
extendFamEnv,
extendTyConsEnv,
extendDataConsEnv,
extendPAFunsEnv,
setPRFunsEnv,
setBoxedTyConsEnv,
updVectInfo
) where
import HscTypes
import InstEnv
import FamInstEnv
import CoreSyn
import Type
import TyCon
import DataCon
import VarEnv
import VarSet
import Var
import Name
import NameEnv
import FastString
-- | Indicates what scope something (a variable) is in.
data Scope a b
= Global a
| Local b
-- LocalEnv -------------------------------------------------------------------
-- | The local environment.
data LocalEnv
= LocalEnv {
-- Mapping from local variables to their vectorised and lifted versions.
local_vars :: VarEnv (Var, Var)
-- In-scope type variables.
, local_tyvars :: [TyVar]
-- Mapping from tyvars to their PA dictionaries.
, local_tyvar_pa :: VarEnv CoreExpr
-- Local binding name.
, local_bind_name :: FastString
}
-- | Create an empty local environment.
emptyLocalEnv :: LocalEnv
emptyLocalEnv = LocalEnv {
local_vars = emptyVarEnv
, local_tyvars = []
, local_tyvar_pa = emptyVarEnv
, local_bind_name = fsLit "fn"
}
-- GlobalEnv ------------------------------------------------------------------
-- | The global environment.
-- These are things the exist at top-level.
data GlobalEnv
= GlobalEnv {
-- | Mapping from global variables to their vectorised versions — aka the /vectorisation
-- map/.
global_vars :: VarEnv Var
-- | Mapping from global variables that have a vectorisation declaration to the right-hand
-- side of that declaration and its type. This mapping only applies to non-scalar
-- vectorisation declarations. All variables with a scalar vectorisation declaration are
-- mentioned in 'global_scalars'.
, global_vect_decls :: VarEnv (Type, CoreExpr)
-- | Purely scalar variables. Code which mentions only these variables doesn't have to be
-- lifted. This includes variables from the current module that have a scalar
-- vectorisation declaration and those that the vectoriser determines to be scalar.
, global_scalars :: VarSet
-- | Exported variables which have a vectorised version.
, global_exported_vars :: VarEnv (Var, Var)
-- | Mapping from TyCons to their vectorised versions.
-- TyCons which do not have to be vectorised are mapped to themselves.
, global_tycons :: NameEnv TyCon
-- | Mapping from DataCons to their vectorised versions.
, global_datacons :: NameEnv DataCon
-- | Mapping from TyCons to their PA dfuns.
, global_pa_funs :: NameEnv Var
-- | Mapping from TyCons to their PR dfuns.
, global_pr_funs :: NameEnv Var
-- | Mapping from unboxed TyCons to their boxed versions.
, global_boxed_tycons :: NameEnv TyCon
-- | External package inst-env & home-package inst-env for class instances.
, global_inst_env :: (InstEnv, InstEnv)
-- | External package inst-env & home-package inst-env for family instances.
, global_fam_inst_env :: FamInstEnvs
-- | Hoisted bindings.
, global_bindings :: [(Var, CoreExpr)]
}
-- | Create an initial global environment
initGlobalEnv :: VectInfo -> [CoreVect] -> (InstEnv, InstEnv) -> FamInstEnvs -> GlobalEnv
initGlobalEnv info vectDecls instEnvs famInstEnvs
= GlobalEnv
{ global_vars = mapVarEnv snd $ vectInfoVar info
, global_vect_decls = mkVarEnv vects
, global_scalars = mkVarSet scalars
, global_exported_vars = emptyVarEnv
, global_tycons = mapNameEnv snd $ vectInfoTyCon info
, global_datacons = mapNameEnv snd $ vectInfoDataCon info
, global_pa_funs = mapNameEnv snd $ vectInfoPADFun info
, global_pr_funs = emptyNameEnv
, global_boxed_tycons = emptyNameEnv
, global_inst_env = instEnvs
, global_fam_inst_env = famInstEnvs
, global_bindings = []
}
where
vects = [(var, (varType var, exp)) | Vect var (Just exp) <- vectDecls]
scalars = [var | Vect var Nothing <- vectDecls]
-- Operators on Global Environments -------------------------------------------
-- | Extend the list of global variables in an environment.
extendImportedVarsEnv :: [(Var, Var)] -> GlobalEnv -> GlobalEnv
extendImportedVarsEnv ps genv
= genv { global_vars = extendVarEnvList (global_vars genv) ps }
-- | Extend the set of scalar variables in an environment.
extendScalars :: [Var] -> GlobalEnv -> GlobalEnv
extendScalars vs genv
= genv { global_scalars = extendVarSetList (global_scalars genv) vs }
-- | Set the list of type family instances in an environment.
setFamEnv :: FamInstEnv -> GlobalEnv -> GlobalEnv
setFamEnv l_fam_inst genv
= genv { global_fam_inst_env = (g_fam_inst, l_fam_inst) }
where (g_fam_inst, _) = global_fam_inst_env genv
extendFamEnv :: [FamInst] -> GlobalEnv -> GlobalEnv
extendFamEnv new genv
= genv { global_fam_inst_env = (g_fam_inst, extendFamInstEnvList l_fam_inst new) }
where (g_fam_inst, l_fam_inst) = global_fam_inst_env genv
-- | Extend the list of type constructors in an environment.
extendTyConsEnv :: [(Name, TyCon)] -> GlobalEnv -> GlobalEnv
extendTyConsEnv ps genv
= genv { global_tycons = extendNameEnvList (global_tycons genv) ps }
-- | Extend the list of data constructors in an environment.
extendDataConsEnv :: [(Name, DataCon)] -> GlobalEnv -> GlobalEnv
extendDataConsEnv ps genv
= genv { global_datacons = extendNameEnvList (global_datacons genv) ps }
-- | Extend the list of PA functions in an environment.
extendPAFunsEnv :: [(Name, Var)] -> GlobalEnv -> GlobalEnv
extendPAFunsEnv ps genv
= genv { global_pa_funs = extendNameEnvList (global_pa_funs genv) ps }
-- | Set the list of PR functions in an environment.
setPRFunsEnv :: [(Name, Var)] -> GlobalEnv -> GlobalEnv
setPRFunsEnv ps genv
= genv { global_pr_funs = mkNameEnv ps }
-- | Set the list of boxed type constructor in an environment.
setBoxedTyConsEnv :: [(Name, TyCon)] -> GlobalEnv -> GlobalEnv
setBoxedTyConsEnv ps genv
= genv { global_boxed_tycons = mkNameEnv ps }
-- | TODO: What is this for?
updVectInfo :: GlobalEnv -> TypeEnv -> VectInfo -> VectInfo
updVectInfo env tyenv info
= info
{ vectInfoVar = global_exported_vars env
, vectInfoTyCon = mk_env typeEnvTyCons global_tycons
, vectInfoDataCon = mk_env typeEnvDataCons global_datacons
, vectInfoPADFun = mk_env typeEnvTyCons global_pa_funs
}
where
mk_env from_tyenv from_env
= mkNameEnv [(name, (from,to))
| from <- from_tyenv tyenv
, let name = getName from
, Just to <- [lookupNameEnv (from_env env) name]]
|
