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| author | Ben Gamari <ben@smart-cactus.org> | 2021-01-11 21:12:42 -0500 |
|---|---|---|
| committer | Marge Bot <ben+marge-bot@smart-cactus.org> | 2021-02-05 19:09:27 -0500 |
| commit | 441724e30d19e1abab4a9b04e270837bfb2c49e6 (patch) | |
| tree | d21a3eb8caa04d7ec687f8a54fc0c7bf0e71a542 | |
| parent | a5a5c7e039b5a6840da8a3b70cee078049aaa5b8 (diff) | |
| download | haskell-441724e30d19e1abab4a9b04e270837bfb2c49e6.tar.gz | |
UnVarGraph: Use foldl' rather than foldr in unionUnVarSets
This is avoids pushing the entire list to the stack before we can begin
computing the result.
| -rw-r--r-- | compiler/GHC/Data/Graph/UnVar.hs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Data/Graph/UnVar.hs b/compiler/GHC/Data/Graph/UnVar.hs index 4d1657ce62..3d6c805a20 100644 --- a/compiler/GHC/Data/Graph/UnVar.hs +++ b/compiler/GHC/Data/Graph/UnVar.hs @@ -74,7 +74,7 @@ unionUnVarSet :: UnVarSet -> UnVarSet -> UnVarSet unionUnVarSet (UnVarSet set1) (UnVarSet set2) = UnVarSet (set1 `S.union` set2) unionUnVarSets :: [UnVarSet] -> UnVarSet -unionUnVarSets = foldr unionUnVarSet emptyUnVarSet +unionUnVarSets = foldl' (flip unionUnVarSet) emptyUnVarSet instance Outputable UnVarSet where ppr (UnVarSet s) = braces $ |