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Fixed some horribly exponential speculative recursion in one of the passes

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Neil Brown 2008-03-06 14:20:21 +00:00
parent 60c7a2dde3
commit a9c2643ad4
1 changed files with 6 additions and 2 deletions
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8
backends/BackendPasses.hs
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@ -117,17 +117,21 @@ declareSizesArray = doGeneric `ext1M` doStructured
doStructured :: Data a => A.Structured a -> PassM (A.Structured a) doStructured :: Data a => A.Structured a -> PassM (A.Structured a)
doStructured str@(A.Spec m sp@(A.Specification m' n spec) s) doStructured str@(A.Spec m sp@(A.Specification m' n spec) s)
= do t <- typeOfSpec spec = do t <- typeOfSpec spec
s' <- doStructured s
case (spec,t) of case (spec,t) of
(_,Just (A.Array ds _)) -> if elem A.UnknownDimension ds (_,Just (A.Array ds _)) -> if elem A.UnknownDimension ds
then do let sizeSpec = A.Specification m' (append_sizes n) (A.Declaration m' (A.Array [A.Dimension $ length ds] A.Int) Nothing) then do let sizeSpec = A.Specification m' (append_sizes n) (A.Declaration m' (A.Array [A.Dimension $ length ds] A.Int) Nothing)
s' <- doStructured s
return (A.Spec m sp $ A.Spec m sizeSpec $ s') -- TODO fix this return (A.Spec m sp $ A.Spec m sizeSpec $ s') -- TODO fix this
else do let n_sizes = append_sizes n else do let n_sizes = append_sizes n
sizeSpecType = makeStaticSizeSpec m' n_sizes ds sizeSpecType = makeStaticSizeSpec m' n_sizes ds
sizeSpec = A.Specification m' n_sizes sizeSpecType sizeSpec = A.Specification m' n_sizes sizeSpecType
defineSizesName m' n_sizes sizeSpecType defineSizesName m' n_sizes sizeSpecType
s' <- doStructured s
return (A.Spec m sp $ A.Spec m sizeSpec $ s') return (A.Spec m sp $ A.Spec m sizeSpec $ s')
(A.RecordType m _ fs, _) -> liftM (A.Spec m sp) $ foldM (declareFieldSizes (A.nameName n) m) s' fs (A.RecordType m _ fs, _) ->
do s' <- doStructured s
fieldDeclarations <- foldM (declareFieldSizes (A.nameName n) m) s' fs
return $ A.Spec m sp fieldDeclarations
_ -> doGeneric str _ -> doGeneric str
doStructured s = doGeneric s doStructured s = doGeneric s