\section[HscTypes]{Types for the per-module compiler}
\begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/CodingStyle#Warnings
+-- for details
+
module HscTypes (
-- * Sessions and compilation state
Session(..), withSession, modifySession,
Linkable(..), isObjectLinkable,
Unlinked(..), CompiledByteCode,
isObject, nameOfObject, isInterpretable, byteCodeOfObject,
- HpcInfo(..), noHpcInfo,
+ HpcInfo(..), emptyHpcInfo, isHpcUsed, AnyHpcUsage,
-- Breakpoints
ModBreaks (..), BreakIndex, emptyModBreaks,
-- and are not put into the interface file
mi_dep_fn :: Name -> Maybe DeprecTxt, -- Cached lookup for mi_deprecs
mi_fix_fn :: OccName -> Fixity, -- Cached lookup for mi_fixities
- mi_ver_fn :: OccName -> Maybe (OccName, Version)
+ mi_ver_fn :: OccName -> Maybe (OccName, Version),
-- Cached lookup for mi_decls
-- The Nothing in mi_ver_fn means that the thing
-- isn't in decls. It's useful to know that when
-- seeing if we are up to date wrt the old interface
-- The 'OccName' is the parent of the name, if it has one.
+ mi_hpc :: !AnyHpcUsage
+ -- True if this program uses Hpc at any point in the program.
}
-- Should be able to construct ModDetails from mi_decls in ModIface
mg_usages :: ![Usage], -- Version info for what it needed
mg_rdr_env :: !GlobalRdrEnv, -- Top-level lexical environment
- mg_fix_env :: !FixityEnv, -- Fixity env, for things declared in
- -- this module
-
- mg_inst_env :: InstEnv, -- Class instance enviroment fro
- -- *home-package* modules (including
- -- this one); c.f. tcg_inst_env
- mg_fam_inst_env :: FamInstEnv, -- Type-family instance enviroment
- -- for *home-package* modules (including
- -- this one); c.f. tcg_fam_inst_env
+ -- These fields all describe the things **declared in this module**
+ mg_fix_env :: !FixityEnv, -- Fixities
mg_types :: !TypeEnv,
mg_insts :: ![Instance], -- Instances
mg_fam_insts :: ![FamInst], -- Instances
mg_deprecs :: !Deprecations, -- Deprecations declared in the module
mg_hpc_info :: !HpcInfo, -- info about coverage tick boxes
mg_modBreaks :: !ModBreaks,
- mg_vect_info :: !VectInfo -- Pool of vectorised declarations
+ mg_vect_info :: !VectInfo, -- Pool of vectorised declarations
+
+ -- The next two fields are unusual, because they give instance
+ -- environments for *all* modules in the home package, including
+ -- this module, rather than for *just* this module.
+ -- Reason: when looking up an instance we don't want to have to
+ -- look at each module in the home package in turn
+ mg_inst_env :: InstEnv, -- Class instance enviroment fro
+ -- *home-package* modules (including
+ -- this one); c.f. tcg_inst_env
+ mg_fam_inst_env :: FamInstEnv -- Type-family instance enviroment
+ -- for *home-package* modules (including
+ -- this one); c.f. tcg_fam_inst_env
}
-- The ModGuts takes on several slightly different forms:
-- "foreign exported" functions
[FastString] -- Headers that need to be included
-- into C code generated for this module
- [Id] -- Foreign-exported binders
- -- we have to generate code to register these
\end{code}
mi_vect_info = noIfaceVectInfo,
mi_dep_fn = emptyIfaceDepCache,
mi_fix_fn = emptyIfaceFixCache,
- mi_ver_fn = emptyIfaceVerCache
+ mi_ver_fn = emptyIfaceVerCache,
+ mi_hpc = False
}
\end{code}
%************************************************************************
\begin{code}
-data HpcInfo = HpcInfo
+data HpcInfo
+ = HpcInfo
{ hpcInfoTickCount :: Int
, hpcInfoHash :: Int
}
- | NoHpcInfo
+ | NoHpcInfo
+ { hpcUsed :: AnyHpcUsage -- is hpc used anywhere on the module tree?
+ }
+
+-- This is used to mean there is no module-local hpc usage,
+-- but one of my imports used hpc instrumentation.
+
+type AnyHpcUsage = Bool
+
+emptyHpcInfo :: AnyHpcUsage -> HpcInfo
+emptyHpcInfo = NoHpcInfo
-noHpcInfo :: HpcInfo
-noHpcInfo = NoHpcInfo
+isHpcUsed :: HpcInfo -> AnyHpcUsage
+isHpcUsed (HpcInfo {}) = True
+isHpcUsed (NoHpcInfo { hpcUsed = used }) = used
\end{code}
%************************************************************************
subsystem. It communicates the vectorisation status of declarations from one
module to another.
-Why do we need both f and f_CC in the ModGuts/ModDetails/EPS version VectInfo
+Why do we need both f and f_v in the ModGuts/ModDetails/EPS version VectInfo
below? We need to know `f' when converting to IfaceVectInfo. However, during
-closure conversion, we need to know `f_CC', whose `Var' we cannot lookup based
+vectorisation, we need to know `f_v', whose `Var' we cannot lookup based
on just the OccName easily in a Core pass.
\begin{code}
-- ModGuts/ModDetails/EPS version
data VectInfo
= VectInfo {
- vectInfoCCVar :: VarEnv (Var , Var ), -- (f, f_CC) keyed on f
- vectInfoCCTyCon :: NameEnv (TyCon , TyCon), -- (T, T_CC) keyed on T
- vectInfoCCDataCon :: NameEnv (DataCon, DataCon), -- (C, C_CC) keyed on C
- vectInfoCCIso :: NameEnv (TyCon , Var) -- (T, isoT) keyed on T
+ vectInfoVar :: VarEnv (Var , Var ), -- (f, f_v) keyed on f
+ vectInfoTyCon :: NameEnv (TyCon , TyCon), -- (T, T_v) keyed on T
+ vectInfoDataCon :: NameEnv (DataCon, DataCon), -- (C, C_v) keyed on C
+ vectInfoPADFun :: NameEnv (TyCon , Var), -- (T_v, paT) keyed on T_v
+ vectInfoIso :: NameEnv (TyCon , Var) -- (T, isoT) keyed on T
}
-- all of this is always tidy, even in ModGuts
-- ModIface version
data IfaceVectInfo
= IfaceVectInfo {
- ifaceVectInfoCCVar :: [Name],
- -- all variables in here have a closure-converted variant;
- -- the name of the CC'ed variant is determined by `mkCloOcc'
- ifaceVectInfoCCTyCon :: [Name],
- -- all tycons in here have a closure-converted variant;
- -- the name of the CC'ed variant and those of its data constructors are
- -- determined by `mkCloTyConOcc' and `mkCloDataConOcc'; the names of
- -- the isomorphisms is determined by `mkCloIsoOcc'
- ifaceVectInfoCCTyConReuse :: [Name]
- -- the closure-converted form of all the tycons in here coincids with
+ ifaceVectInfoVar :: [Name],
+ -- all variables in here have a vectorised variant;
+ -- the name of the vectorised variant is determined by `mkCloVect'
+ ifaceVectInfoTyCon :: [Name],
+ -- all tycons in here have a vectorised variant;
+ -- the name of the vectorised variant and those of its
+ -- data constructors are determined by `mkVectTyConOcc'
+ -- and `mkVectDataConOcc'; the names of
+ -- the isomorphisms is determined by `mkVectIsoOcc'
+ ifaceVectInfoTyConReuse :: [Name]
+ -- the vectorised form of all the tycons in here coincids with
-- the unconverted from; the names of the isomorphisms is determined
- -- by `mkCloIsoOcc'
+ -- by `mkVectIsoOcc'
}
noVectInfo :: VectInfo
-noVectInfo = VectInfo emptyVarEnv emptyNameEnv emptyNameEnv emptyNameEnv
+noVectInfo = VectInfo emptyVarEnv emptyNameEnv emptyNameEnv emptyNameEnv emptyNameEnv
plusVectInfo :: VectInfo -> VectInfo -> VectInfo
plusVectInfo vi1 vi2 =
- VectInfo (vectInfoCCVar vi1 `plusVarEnv` vectInfoCCVar vi2)
- (vectInfoCCTyCon vi1 `plusNameEnv` vectInfoCCTyCon vi2)
- (vectInfoCCDataCon vi1 `plusNameEnv` vectInfoCCDataCon vi2)
- (vectInfoCCIso vi1 `plusNameEnv` vectInfoCCIso vi2)
+ VectInfo (vectInfoVar vi1 `plusVarEnv` vectInfoVar vi2)
+ (vectInfoTyCon vi1 `plusNameEnv` vectInfoTyCon vi2)
+ (vectInfoDataCon vi1 `plusNameEnv` vectInfoDataCon vi2)
+ (vectInfoPADFun vi1 `plusNameEnv` vectInfoPADFun vi2)
+ (vectInfoIso vi1 `plusNameEnv` vectInfoIso vi2)
noIfaceVectInfo :: IfaceVectInfo
noIfaceVectInfo = IfaceVectInfo [] [] []
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