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| author | Vladislav Zavialov <vlad.z.4096@gmail.com> | 2021-04-06 15:51:38 +0300 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-05-23 18:53:13 -0400 |
| commit | d82d38239f232c3970a8641bb6d47d436e3cbc11 (patch) | |
| tree | 55b162143144486cddda1b2a2a7ca0b7eb373a1c /compiler/GHC/HsToCore | |
| parent | 82c6a9394b0457e77bc8b03e3594111b51508469 (diff) | |
| download | haskell-d82d38239f232c3970a8641bb6d47d436e3cbc11.tar.gz | |
Introduce Strict.Maybe, Strict.Pair (#19156)
This patch fixes a space leak related to the use of
Maybe in RealSrcSpan by introducing a strict variant
of Maybe.
In addition to that, it also introduces a strict pair
and uses the newly introduced strict data types in a few
other places (e.g. the lexer/parser state) to reduce
allocations.
Includes a regression test.
Diffstat (limited to 'compiler/GHC/HsToCore')
| -rw-r--r-- | compiler/GHC/HsToCore/Monad.hs | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/compiler/GHC/HsToCore/Monad.hs b/compiler/GHC/HsToCore/Monad.hs index 691f78b4ef..6844606276 100644 --- a/compiler/GHC/HsToCore/Monad.hs +++ b/compiler/GHC/HsToCore/Monad.hs @@ -109,6 +109,7 @@ import GHC.Types.Error import GHC.Utils.Error import GHC.Utils.Outputable import GHC.Utils.Panic +import qualified GHC.Data.Strict as Strict import Data.IORef @@ -454,7 +455,7 @@ updPmNablas nablas = updLclEnv (\env -> env { dsl_nablas = nablas }) getSrcSpanDs :: DsM SrcSpan getSrcSpanDs = do { env <- getLclEnv - ; return (RealSrcSpan (dsl_loc env) Nothing) } + ; return (RealSrcSpan (dsl_loc env) Strict.Nothing) } putSrcSpanDs :: SrcSpan -> DsM a -> DsM a putSrcSpanDs (UnhelpfulSpan {}) thing_inside |