[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 2 commits: Fix sharing of 'IfaceTyConInfo' during core to iface type translation
Marge Bot (@marge-bot)
gitlab at gitlab.haskell.org
Mon Mar 18 23:02:36 UTC 2024
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
e882d9ca by Fendor at 2024-03-18T19:02:24-04:00
Fix sharing of 'IfaceTyConInfo' during core to iface type translation
During heap analysis, we noticed that during generation of
'mi_extra_decls' we have lots of duplicates for the instances:
* `IfaceTyConInfo NotPromoted IfaceNormalTyCon`
* `IfaceTyConInfo IsPromoted IfaceNormalTyCon`
which should be shared instead of duplicated. This duplication increased
the number of live bytes by around 200MB while loading the agda codebase
into GHCi.
These instances are created during `CoreToIface` translation, in
particular `toIfaceTyCon`.
The generated core looks like:
toIfaceTyCon
= \ tc_sjJw ->
case $wtoIfaceTyCon tc_sjJw of
{ (# ww_sjJz, ww1_sjNL, ww2_sjNM #) ->
IfaceTyCon ww_sjJz (IfaceTyConInfo ww1_sjNL ww2_sjNM)
}
whichs removes causes the sharing to work propery.
Adding explicit sharing, with NOINLINE annotations, changes the core to:
toIfaceTyCon
= \ tc_sjJq ->
case $wtoIfaceTyCon tc_sjJq of { (# ww_sjNB, ww1_sjNC #) ->
IfaceTyCon ww_sjNB ww1_sjNC
}
which looks much more like sharing is happening.
We confirmed via ghc-debug that all duplications were eliminated and the
number of live bytes are noticeably reduced.
- - - - -
289acbf8 by Alan Zimmerman at 2024-03-18T19:02:24-04:00
EPA: Address more 9.10.1-alpha1 regressions from recent changes
Closes #24533
Hopefully for good this time
- - - - -
6 changed files:
- compiler/GHC/Iface/Type.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/PostProcess.hs
- testsuite/tests/parser/should_compile/DumpSemis.stderr
- testsuite/tests/printer/Test24533.hs
- testsuite/tests/printer/Test24533.stdout
Changes:
=====================================
compiler/GHC/Iface/Type.hs
=====================================
@@ -361,12 +361,51 @@ data IfaceTyConInfo -- Used only to guide pretty-printing
, ifaceTyConSort :: IfaceTyConSort }
deriving (Eq)
--- This smart constructor allows sharing of the two most common
--- cases. See #19194
+-- | This smart constructor allows sharing of the two most common
+-- cases. See Note [Sharing IfaceTyConInfo]
mkIfaceTyConInfo :: PromotionFlag -> IfaceTyConSort -> IfaceTyConInfo
-mkIfaceTyConInfo IsPromoted IfaceNormalTyCon = IfaceTyConInfo IsPromoted IfaceNormalTyCon
-mkIfaceTyConInfo NotPromoted IfaceNormalTyCon = IfaceTyConInfo NotPromoted IfaceNormalTyCon
-mkIfaceTyConInfo prom sort = IfaceTyConInfo prom sort
+mkIfaceTyConInfo IsPromoted IfaceNormalTyCon = promotedNormalTyConInfo
+mkIfaceTyConInfo NotPromoted IfaceNormalTyCon = notPromotedNormalTyConInfo
+mkIfaceTyConInfo prom sort = IfaceTyConInfo prom sort
+
+{-# NOINLINE promotedNormalTyConInfo #-}
+-- | See Note [Sharing IfaceTyConInfo]
+promotedNormalTyConInfo :: IfaceTyConInfo
+promotedNormalTyConInfo = IfaceTyConInfo IsPromoted IfaceNormalTyCon
+
+{-# NOINLINE notPromotedNormalTyConInfo #-}
+-- | See Note [Sharing IfaceTyConInfo]
+notPromotedNormalTyConInfo :: IfaceTyConInfo
+notPromotedNormalTyConInfo = IfaceTyConInfo NotPromoted IfaceNormalTyCon
+
+{-
+Note [Sharing IfaceTyConInfo]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+'IfaceTyConInfo' occurs an awful lot in 'ModIface', see #19194 for an example.
+But almost all of them are
+
+ IfaceTyConInfo IsPromoted IfaceNormalTyCon
+ IfaceTyConInfo NotPromoted IfaceNormalTyCon.
+
+The smart constructor `mkIfaceTyConInfo` arranges to share these instances,
+thus:
+
+ promotedNormalTyConInfo = IfaceTyConInfo IsPromoted IfaceNormalTyCon
+ notPromotedNormalTyConInfo = IfaceTyConInfo NotPromoted IfaceNormalTyCon
+
+ mkIfaceTyConInfo IsPromoted IfaceNormalTyCon = promotedNormalTyConInfo
+ mkIfaceTyConInfo NotPromoted IfaceNormalTyCon = notPromotedNormalTyConInfo
+ mkIfaceTyConInfo prom sort = IfaceTyConInfo prom sort
+
+But ALAS, the (nested) CPR transform can lose this sharing, completely
+negating the effect of `mkIfaceTyConInfo`: see #24530 and #19326.
+
+Sticking-plaster solution: add a NOINLINE pragma to those top-level constants.
+When we fix the CPR bug we can remove the NOINLINE pragmas.
+
+This one change leads to an 15% reduction in residency for GHC when embedding
+'mi_extra_decls': see !12222.
+-}
data IfaceMCoercion
= IfaceMRefl
=====================================
compiler/GHC/Parser.y
=====================================
@@ -1237,12 +1237,12 @@ topdecl_cs : topdecl {% commentsPA $1 }
-----------------------------------------------------------------------------
topdecl :: { LHsDecl GhcPs }
- : cl_decl { sL1a $1 (TyClD noExtField (unLoc $1)) }
- | ty_decl { sL1a $1 (TyClD noExtField (unLoc $1)) }
- | standalone_kind_sig { sL1a $1 (KindSigD noExtField (unLoc $1)) }
- | inst_decl { sL1a $1 (InstD noExtField (unLoc $1)) }
- | stand_alone_deriving { sL1a $1 (DerivD noExtField (unLoc $1)) }
- | role_annot { sL1a $1 (RoleAnnotD noExtField (unLoc $1)) }
+ : cl_decl { L (getLoc $1) (TyClD noExtField (unLoc $1)) }
+ | ty_decl { L (getLoc $1) (TyClD noExtField (unLoc $1)) }
+ | standalone_kind_sig { L (getLoc $1) (KindSigD noExtField (unLoc $1)) }
+ | inst_decl { L (getLoc $1) (InstD noExtField (unLoc $1)) }
+ | stand_alone_deriving { L (getLoc $1) (DerivD noExtField (unLoc $1)) }
+ | role_annot { L (getLoc $1) (RoleAnnotD noExtField (unLoc $1)) }
| 'default' '(' comma_types0 ')' {% amsA' (sLL $1 $>
(DefD noExtField (DefaultDecl [mj AnnDefault $1,mop $2,mcp $4] $3))) }
| 'foreign' fdecl {% amsA' (sLL $1 $> ((snd $ unLoc $2) (mj AnnForeign $1:(fst $ unLoc $2)))) }
=====================================
compiler/GHC/Parser/PostProcess.hs
=====================================
@@ -943,11 +943,13 @@ checkTyVars pp_what equals_or_where tc tparms
-- Keep around an action for adjusting the annotations of extra parens
chkParens :: [AddEpAnn] -> [AddEpAnn] -> HsBndrVis GhcPs -> LHsType GhcPs
-> P (LHsTyVarBndr (HsBndrVis GhcPs) GhcPs)
- chkParens ops cps bvis (L l (HsParTy _ ty))
+ chkParens ops cps bvis (L l (HsParTy _ (L lt ty)))
= let
(o,c) = mkParensEpAnn (realSrcSpan $ locA l)
+ lcs = epAnnComments l
+ lt' = setCommentsEpAnn lt lcs
in
- chkParens (o:ops) (c:cps) bvis ty
+ chkParens (o:ops) (c:cps) bvis (L lt' ty)
chkParens ops cps bvis ty = chk ops cps bvis ty
-- Check that the name space is correct!
=====================================
testsuite/tests/parser/should_compile/DumpSemis.stderr
=====================================
@@ -212,7 +212,10 @@
(EpaComments
[]))
(HsTupleTy
- (AnnParen AnnParens (EpaSpan { DumpSemis.hs:9:11 }) (EpaSpan { DumpSemis.hs:9:12 }))
+ (AnnParen
+ AnnParens
+ (EpaSpan { DumpSemis.hs:9:11 })
+ (EpaSpan { DumpSemis.hs:9:12 }))
(HsBoxedOrConstraintTuple)
[]))))))))))
,(L
@@ -498,7 +501,10 @@
(EpaComments
[]))
(HsTupleTy
- (AnnParen AnnParens (EpaSpan { DumpSemis.hs:14:11 }) (EpaSpan { DumpSemis.hs:14:12 }))
+ (AnnParen
+ AnnParens
+ (EpaSpan { DumpSemis.hs:14:11 })
+ (EpaSpan { DumpSemis.hs:14:12 }))
(HsBoxedOrConstraintTuple)
[]))))))))))
,(L
@@ -747,7 +753,10 @@
(EpaComments
[]))
(HsTupleTy
- (AnnParen AnnParens (EpaSpan { DumpSemis.hs:21:11 }) (EpaSpan { DumpSemis.hs:21:12 }))
+ (AnnParen
+ AnnParens
+ (EpaSpan { DumpSemis.hs:21:11 })
+ (EpaSpan { DumpSemis.hs:21:12 }))
(HsBoxedOrConstraintTuple)
[]))))))))))
,(L
=====================================
testsuite/tests/printer/Test24533.hs
=====================================
@@ -6,3 +6,9 @@ instance
Read b
) =>
Read (a, b)
+
+class Foo (a :: Type {- Weird -})
+
+instance Eq Foo where
+ -- Weird
+ Foo == Foo = True
=====================================
testsuite/tests/printer/Test24533.stdout
=====================================
@@ -13,8 +13,8 @@
[]
(Just
((,)
- { Test24533.hs:9:1 }
- { Test24533.hs:8:13 })))
+ { Test24533.hs:15:1 }
+ { Test24533.hs:14:16-19 })))
(EpaCommentsBalanced
[(L
(EpaSpan
@@ -273,6 +273,323 @@
[]
[]
[]
+ (Nothing)))))
+ ,(L
+ (EpAnn
+ (EpaSpan { Test24533.hs:10:1-33 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (TyClD
+ (NoExtField)
+ (ClassDecl
+ ((,,)
+ [(AddEpAnn AnnClass (EpaSpan { Test24533.hs:10:1-5 }))]
+ (EpNoLayout)
+ (NoAnnSortKey))
+ (Nothing)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:10:7-9 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Foo}))
+ (HsQTvs
+ (NoExtField)
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.hs:10:11-33 })
+ (AnnListItem
+ [])
+ (EpaComments
+ [(L
+ (EpaSpan
+ { Test24533.hs:10:22-32 })
+ (EpaComment
+ (EpaBlockComment
+ "{- Weird -}")
+ { Test24533.hs:10:17-20 }))]))
+ (KindedTyVar
+ [(AddEpAnn AnnOpenP (EpaSpan { Test24533.hs:10:11 }))
+ ,(AddEpAnn AnnCloseP (EpaSpan { Test24533.hs:10:33 }))
+ ,(AddEpAnn AnnDcolon (EpaSpan { Test24533.hs:10:14-15 }))]
+ (HsBndrRequired
+ (NoExtField))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:10:12 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: a}))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:10:17-20 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsTyVar
+ []
+ (NotPromoted)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:10:17-20 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Type}))))))])
+ (Prefix)
+ []
+ []
+ {Bag(LocatedA (HsBind GhcPs)):
+ []}
+ []
+ []
+ [])))
+ ,(L
+ (EpAnn
+ (EpaSpan { Test24533.hs:(12,1)-(14,19) })
+ (AnnListItem
+ [])
+ (EpaComments
+ [(L
+ (EpaSpan
+ { Test24533.hs:13:3-10 })
+ (EpaComment
+ (EpaLineComment
+ "-- Weird")
+ { Test24533.hs:12:17-21 }))]))
+ (InstD
+ (NoExtField)
+ (ClsInstD
+ (NoExtField)
+ (ClsInstDecl
+ ((,,)
+ (Nothing)
+ [(AddEpAnn AnnInstance (EpaSpan { Test24533.hs:12:1-8 }))
+ ,(AddEpAnn AnnWhere (EpaSpan { Test24533.hs:12:17-21 }))]
+ (NoAnnSortKey))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:12:10-15 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsSig
+ (NoExtField)
+ (HsOuterImplicit
+ (NoExtField))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:12:10-15 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsAppTy
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:12:10-11 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsTyVar
+ []
+ (NotPromoted)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:12:10-11 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Eq}))))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:12:13-15 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsTyVar
+ []
+ (NotPromoted)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:12:13-15 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Foo}))))))))
+ {Bag(LocatedA (HsBind GhcPs)):
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:3-19 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (FunBind
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:7-8 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: ==}))
+ (MG
+ (FromSource)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:3-19 })
+ (AnnList
+ (Nothing)
+ (Nothing)
+ (Nothing)
+ []
+ [])
+ (EpaComments
+ []))
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:3-19 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (Match
+ []
+ (FunRhs
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:7-8 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: ==}))
+ (Infix)
+ (NoSrcStrict))
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:3-5 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (VisPat
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:3-5 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (ConPat
+ []
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:3-5 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Foo}))
+ (PrefixCon
+ []
+ [])))))
+ ,(L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:10-12 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (VisPat
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:10-12 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (ConPat
+ []
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:10-12 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Foo}))
+ (PrefixCon
+ []
+ [])))))]
+ (GRHSs
+ (EpaComments
+ [])
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:14-19 })
+ (NoEpAnns)
+ (EpaComments
+ []))
+ (GRHS
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:14-19 })
+ (GrhsAnn
+ (Nothing)
+ (AddEpAnn AnnEqual (EpaSpan { Test24533.hs:14:14 })))
+ (EpaComments
+ []))
+ []
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:16-19 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsVar
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.hs:14:16-19 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: True}))))))]
+ (EmptyLocalBinds
+ (NoExtField)))))]))))]}
+ []
+ []
+ []
(Nothing)))))]))
@@ -291,8 +608,8 @@
[]
(Just
((,)
- { Test24533.ppr.hs:3:41 }
- { Test24533.ppr.hs:3:40 })))
+ { Test24533.ppr.hs:6:20 }
+ { Test24533.ppr.hs:6:16-19 })))
(EpaCommentsBalanced
[(L
(EpaSpan
@@ -545,4 +862,311 @@
[]
[]
[]
- (Nothing)))))]))
\ No newline at end of file
+ (Nothing)))))
+ ,(L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:4:1-21 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (TyClD
+ (NoExtField)
+ (ClassDecl
+ ((,,)
+ [(AddEpAnn AnnClass (EpaSpan { Test24533.ppr.hs:4:1-5 }))]
+ (EpNoLayout)
+ (NoAnnSortKey))
+ (Nothing)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:4:7-9 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Foo}))
+ (HsQTvs
+ (NoExtField)
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:4:11-21 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (KindedTyVar
+ [(AddEpAnn AnnOpenP (EpaSpan { Test24533.ppr.hs:4:11 }))
+ ,(AddEpAnn AnnCloseP (EpaSpan { Test24533.ppr.hs:4:21 }))
+ ,(AddEpAnn AnnDcolon (EpaSpan { Test24533.ppr.hs:4:14-15 }))]
+ (HsBndrRequired
+ (NoExtField))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:4:12 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: a}))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:4:17-20 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsTyVar
+ []
+ (NotPromoted)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:4:17-20 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Type}))))))])
+ (Prefix)
+ []
+ []
+ {Bag(LocatedA (HsBind GhcPs)):
+ []}
+ []
+ []
+ [])))
+ ,(L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:(5,1)-(6,19) })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (InstD
+ (NoExtField)
+ (ClsInstD
+ (NoExtField)
+ (ClsInstDecl
+ ((,,)
+ (Nothing)
+ [(AddEpAnn AnnInstance (EpaSpan { Test24533.ppr.hs:5:1-8 }))
+ ,(AddEpAnn AnnWhere (EpaSpan { Test24533.ppr.hs:5:17-21 }))]
+ (NoAnnSortKey))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:5:10-15 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsSig
+ (NoExtField)
+ (HsOuterImplicit
+ (NoExtField))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:5:10-15 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsAppTy
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:5:10-11 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsTyVar
+ []
+ (NotPromoted)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:5:10-11 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Eq}))))
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:5:13-15 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsTyVar
+ []
+ (NotPromoted)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:5:13-15 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Foo}))))))))
+ {Bag(LocatedA (HsBind GhcPs)):
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:3-19 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (FunBind
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:7-8 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: ==}))
+ (MG
+ (FromSource)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:3-19 })
+ (AnnList
+ (Nothing)
+ (Nothing)
+ (Nothing)
+ []
+ [])
+ (EpaComments
+ []))
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:3-19 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (Match
+ []
+ (FunRhs
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:7-8 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: ==}))
+ (Infix)
+ (NoSrcStrict))
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:3-5 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (VisPat
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:3-5 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (ConPat
+ []
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:3-5 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Foo}))
+ (PrefixCon
+ []
+ [])))))
+ ,(L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:10-12 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (VisPat
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:10-12 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (ConPat
+ []
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:10-12 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: Foo}))
+ (PrefixCon
+ []
+ [])))))]
+ (GRHSs
+ (EpaComments
+ [])
+ [(L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:14-19 })
+ (NoEpAnns)
+ (EpaComments
+ []))
+ (GRHS
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:14-19 })
+ (GrhsAnn
+ (Nothing)
+ (AddEpAnn AnnEqual (EpaSpan { Test24533.ppr.hs:6:14 })))
+ (EpaComments
+ []))
+ []
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:16-19 })
+ (AnnListItem
+ [])
+ (EpaComments
+ []))
+ (HsVar
+ (NoExtField)
+ (L
+ (EpAnn
+ (EpaSpan { Test24533.ppr.hs:6:16-19 })
+ (NameAnnTrailing
+ [])
+ (EpaComments
+ []))
+ (Unqual
+ {OccName: True}))))))]
+ (EmptyLocalBinds
+ (NoExtField)))))]))))]}
+ []
+ []
+ []
+ (Nothing)))))]))
+
+
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7d88de7d87ea424d1142ab6cae8658c6f676e057...289acbf8bfda82f9e0f25403540facb21f0b8041
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7d88de7d87ea424d1142ab6cae8658c6f676e057...289acbf8bfda82f9e0f25403540facb21f0b8041
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