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| author | Sebastian Graf <sgraf1337@gmail.com> | 2019-11-03 19:42:52 +0000 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-03-14 12:54:29 -0400 |
| commit | b73c9c5face16cc8bedf4168ce10770c7cc67f80 (patch) | |
| tree | 9e5b60b2cfd7ddbae3562c21e838a797fe7539f0 /compiler/GHC/Stg/Lint.hs | |
| parent | 96b3c66b50c77c105dd97b7ef9b44d0779d712b1 (diff) | |
| download | haskell-b73c9c5face16cc8bedf4168ce10770c7cc67f80.tar.gz | |
Implement the UnliftedDatatypes extension
GHC Proposal: 0265-unlifted-datatypes.rst
Discussion: https://github.com/ghc-proposals/ghc-proposals/pull/265
Issues: https://gitlab.haskell.org/ghc/ghc/-/issues/19523
Implementation Details: Note [Implementation of UnliftedDatatypes]
This patch introduces the `UnliftedDatatypes` extension. When this extension is
enabled, GHC relaxes the restrictions around what result kinds are allowed in
data declarations. This allows data types for which an unlifted or
levity-polymorphic result kind is inferred.
The most significant changes are in `GHC.Tc.TyCl`, where
`Note [Implementation of UnliftedDatatypes]` describes the details of the
implementation.
Fixes #19523.
Diffstat (limited to 'compiler/GHC/Stg/Lint.hs')
| -rw-r--r-- | compiler/GHC/Stg/Lint.hs | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/compiler/GHC/Stg/Lint.hs b/compiler/GHC/Stg/Lint.hs index bf52840f5c..1e12e9bab9 100644 --- a/compiler/GHC/Stg/Lint.hs +++ b/compiler/GHC/Stg/Lint.hs @@ -45,7 +45,7 @@ import GHC.Driver.Session import GHC.Data.Bag ( Bag, emptyBag, isEmptyBag, snocBag, bagToList ) import GHC.Types.Basic ( TopLevelFlag(..), isTopLevel ) import GHC.Types.CostCentre ( isCurrentCCS ) -import GHC.Types.Id ( Id, idType, isJoinId, idName ) +import GHC.Types.Id import GHC.Types.Var.Set import GHC.Core.DataCon import GHC.Core ( AltCon(..) ) @@ -134,8 +134,10 @@ lint_binds_help top_lvl (binder, rhs) lintStgRhs rhs opts <- getStgPprOpts -- Check binder doesn't have unlifted type or it's a join point - checkL (isJoinId binder || not (isUnliftedType (idType binder))) - (mkUnliftedTyMsg opts binder rhs) + checkL ( isJoinId binder + || not (isUnliftedType (idType binder)) + || isDataConWorkId binder || isDataConWrapId binder) -- until #17521 is fixed + (mkUnliftedTyMsg opts binder rhs) -- | Top-level bindings can't inherit the cost centre stack from their -- (static) allocation site. |