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NNum sharing

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crumbtoo
2023-11-30 10:36:13 -07:00
parent 5cf1e86732
commit 4754601f1b
2 changed files with 90 additions and 3 deletions
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36
src/GM.hs
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@@ -132,23 +132,52 @@ step st = case head (st ^. gmCode) of
a = fromMaybe (error $ "undefined var: " <> show k)
$ lookup k m
-- Extension Rules 1,2 (sharing)
pushInt :: Int -> GmState -> GmState
pushInt n st = st
pushInt n st = case lookup n' m of
Just a -> st
& gmCode %~ drop 1
& gmStack .~ s'
where
s' = a : s
Nothing -> st
& gmCode %~ drop 1
& gmStack .~ s'
& gmHeap .~ h'
-- record the newly allocated int
& gmStats . stsAllocations %~ succ --
where
s' = a : s
(h',a) = alloc h (NNum n)
m' = (n',a) : m
where
m = st ^. gmEnv
s = st ^. gmStack
h = st ^. gmHeap
n' = show n
s' = a : s
(h',a) = alloc h (NNum n)
-- Core Rule 2. (no sharing)
-- pushInt :: Int -> GmState -> GmState
-- pushInt n st = st
-- & gmCode %~ drop 1
-- & gmStack .~ s'
-- & gmHeap .~ h'
-- & gmStats . stsAllocations %~ succ
-- where
-- s = st ^. gmStack
-- h = st ^. gmHeap
-- s' = a : s
-- (h',a) = alloc h (NNum n)
mkAp :: GmState -> GmState
mkAp st = st
& gmCode %~ drop 1
& gmStack .~ s'
& gmHeap .~ h'
-- record the application we allocated
& gmStats . stsAllocations %~ succ
where
(f:x:ss) = st ^. gmStack
h = st ^. gmHeap
@@ -224,6 +253,7 @@ buildInitialHeap (Program ss) = mapAccumL allocateSc mempty compiled
where
compiled = fmap compileSc ss
-- note that we don't count sc allocations in the stats
allocateSc :: GmHeap -> CompiledSC -> (GmHeap, (Name, Addr))
allocateSc h (n,d,c) = (h', (n, a))
where (h',a) = alloc h $ NGlobal d c