lower levels it is preserved with @let@/@letrec@s).
\begin{code}
-#include "HsVersions.h"
-
module DsBinds ( dsBinds, dsMonoBinds ) where
-IMP_Ubiq()
-#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ <= 201
-IMPORT_DELOOPER(DsLoop) -- break dsExpr-ish loop
-#else
+#include "HsVersions.h"
+
import {-# SOURCE #-} DsExpr
-#endif
import HsSyn -- lots of things
import CoreSyn -- lots of things
import CoreUtils ( coreExprType )
-import TcHsSyn ( SYN_IE(TypecheckedHsBinds), SYN_IE(TypecheckedHsExpr),
- SYN_IE(TypecheckedMonoBinds),
- SYN_IE(TypecheckedPat)
+import TcHsSyn ( TypecheckedHsBinds, TypecheckedHsExpr,
+ TypecheckedMonoBinds,
+ TypecheckedPat
)
import DsMonad
import DsGRHSs ( dsGuarded )
import DsUtils
import Match ( matchWrapper )
-import BasicTypes ( SYN_IE(Module) )
+import BasicTypes ( Module, RecFlag(..) )
import CmdLineOpts ( opt_SccProfilingOn, opt_AutoSccsOnAllToplevs,
opt_AutoSccsOnExportedToplevs
)
import CostCentre ( mkAutoCC, IsCafCC(..), mkAllDictsCC, preludeDictsCostCentre )
-import Id ( idType, SYN_IE(DictVar), GenId, SYN_IE(Id) )
---ToDo: rm import ListSetOps ( minusList, intersectLists )
+import Id ( idType, DictVar, Id )
import Name ( isExported )
-import PprType ( GenType )
-import Outputable ( PprStyle(..) )
import Type ( mkTyVarTy, isDictTy, instantiateTy
)
-import TyVar ( tyVarSetToList, GenTyVar{-instance Eq-} )
+import TyVar ( tyVarSetToList, zipTyVarEnv )
import TysPrim ( voidTy )
-import Util ( isIn, panic, assertPanic )
+import Util ( isIn )
+import Outputable
\end{code}
%************************************************************************
= andDs (++) (dsBinds auto_scc binds_1) (dsBinds auto_scc binds_2)
dsBinds auto_scc (MonoBind binds sigs is_rec)
- = dsMonoBinds auto_scc is_rec binds [] `thenDs` \ prs ->
- returnDs (if is_rec then
- [Rec prs]
- else
- [NonRec binder rhs | (binder,rhs) <- prs]
+ = dsMonoBinds auto_scc binds [] `thenDs` \ prs ->
+ returnDs (case is_rec of
+ Recursive -> [Rec prs]
+ NonRecursive -> [NonRec binder rhs | (binder,rhs) <- prs]
)
\end{code}
\begin{code}
dsMonoBinds :: Bool -- False => don't (auto-)annotate scc on toplevs.
- -> RecFlag
-> TypecheckedMonoBinds
-> [(Id,CoreExpr)] -- Put this on the end (avoid quadratic append)
-> DsM [(Id,CoreExpr)] -- Result
-dsMonoBinds _ is_rec EmptyMonoBinds rest = returnDs rest
+dsMonoBinds _ EmptyMonoBinds rest = returnDs rest
-dsMonoBinds auto_scc is_rec (AndMonoBinds binds_1 binds_2) rest
- = dsMonoBinds auto_scc is_rec binds_2 rest `thenDs` \ rest' ->
- dsMonoBinds auto_scc is_rec binds_1 rest'
+dsMonoBinds auto_scc (AndMonoBinds binds_1 binds_2) rest
+ = dsMonoBinds auto_scc binds_2 rest `thenDs` \ rest' ->
+ dsMonoBinds auto_scc binds_1 rest'
-dsMonoBinds _ is_rec (CoreMonoBind var core_expr) rest
+dsMonoBinds _ (CoreMonoBind var core_expr) rest
= returnDs ((var, core_expr) : rest)
-dsMonoBinds _ is_rec (VarMonoBind var expr) rest
+dsMonoBinds _ (VarMonoBind var expr) rest
= dsExpr expr `thenDs` \ core_expr ->
-- Dictionary bindings are always VarMonoBinds, so
returnDs ((var, core_expr') : rest)
-dsMonoBinds auto_scc is_rec (FunMonoBind fun _ matches locn) rest
+dsMonoBinds auto_scc (FunMonoBind fun _ matches locn) rest
= putSrcLocDs locn $
matchWrapper (FunMatch fun) matches error_string `thenDs` \ (args, body) ->
addAutoScc auto_scc (fun, mkValLam args body) `thenDs` \ pair ->
where
error_string = "function " ++ showForErr fun
-dsMonoBinds _ is_rec (PatMonoBind pat grhss_and_binds locn) rest
+dsMonoBinds _ (PatMonoBind pat grhss_and_binds locn) rest
= putSrcLocDs locn $
dsGuarded grhss_and_binds `thenDs` \ body_expr ->
mkSelectorBinds pat body_expr `thenDs` \ sel_binds ->
returnDs (sel_binds ++ rest)
-- Common special case: no type or dictionary abstraction
-dsMonoBinds auto_scc is_rec (AbsBinds [] [] exports binds) rest
+dsMonoBinds auto_scc (AbsBinds [] [] exports binds) rest
= mapDs (addAutoScc auto_scc) [(global, Var local) | (_, global, local) <- exports] `thenDs` \ exports' ->
- dsMonoBinds False is_rec binds (exports' ++ rest)
+ dsMonoBinds False binds (exports' ++ rest)
-- Another common case: one exported variable
-- All non-recursive bindings come through this way
-dsMonoBinds auto_scc is_rec (AbsBinds all_tyvars dicts [(tyvars, global, local)] binds) rest
+dsMonoBinds auto_scc (AbsBinds all_tyvars dicts [(tyvars, global, local)] binds) rest
= ASSERT( all (`elem` tyvars) all_tyvars )
- dsMonoBinds False is_rec binds [] `thenDs` \ core_prs ->
+ dsMonoBinds False binds [] `thenDs` \ core_prs ->
let
- core_binds | is_rec = [Rec core_prs]
- | otherwise = [NonRec b e | (b,e) <- core_prs]
+ -- Always treat the binds as recursive, because the typechecker
+ -- makes rather mixed-up dictionary bindings
+ core_binds = [Rec core_prs]
in
addAutoScc auto_scc (global, mkLam tyvars dicts $
mkCoLetsAny core_binds (Var local)) `thenDs` \ global' ->
returnDs (global' : rest)
-dsMonoBinds auto_scc is_rec (AbsBinds all_tyvars dicts exports binds) rest
- = dsMonoBinds False is_rec binds [] `thenDs` \ core_prs ->
+dsMonoBinds auto_scc (AbsBinds all_tyvars dicts exports binds) rest
+ = dsMonoBinds False binds [] `thenDs` \ core_prs ->
let
- core_binds | is_rec = [Rec core_prs]
- | otherwise = [NonRec b e | (b,e) <- core_prs]
+ core_binds = [Rec core_prs]
tup_expr = mkLam all_tyvars dicts $
mkCoLetsAny core_binds $
mk_ty_arg all_tyvar | all_tyvar `elem` tyvars = mkTyVarTy all_tyvar
| otherwise = voidTy
ty_args = map mk_ty_arg all_tyvars
- env = all_tyvars `zip` ty_args
+ env = all_tyvars `zipTyVarEnv` ty_args
in
zipWithDs mk_bind exports [0..] `thenDs` \ export_binds ->
-- don't scc (auto-)annotate the tuple itself.
projects / ghc-hetmet.git / blobdiff