diff options
| 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/StgToCmm | |
| 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/StgToCmm')
| -rw-r--r-- | compiler/GHC/StgToCmm/Env.hs | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/compiler/GHC/StgToCmm/Env.hs b/compiler/GHC/StgToCmm/Env.hs index 3ad42fd19d..ebfff0185f 100644 --- a/compiler/GHC/StgToCmm/Env.hs +++ b/compiler/GHC/StgToCmm/Env.hs @@ -136,12 +136,15 @@ getCgIdInfo id let name = idName id ; if isExternalName name then let ext_lbl - | isUnliftedType (idType id) = + | isBoxedType (idType id) + = mkClosureLabel name $ idCafInfo id + | isUnliftedType (idType id) -- An unlifted external Id must refer to a top-level -- string literal. See Note [Bytes label] in "GHC.Cmm.CLabel". - ASSERT( idType id `eqType` addrPrimTy ) - mkBytesLabel name - | otherwise = mkClosureLabel name $ idCafInfo id + = ASSERT( idType id `eqType` addrPrimTy ) + mkBytesLabel name + | otherwise + = pprPanic "GHC.StgToCmm.Env: label not found" (ppr id <+> dcolon <+> ppr (idType id)) in return $ litIdInfo platform id (mkLFImported id) (CmmLabel ext_lbl) else |