71 lines
2.2 KiB
Factor
71 lines
2.2 KiB
Factor
! Copyright (C) 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors combinators compiler.tree
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compiler.tree.combinators
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compiler.tree.escape-analysis.allocations
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compiler.tree.escape-analysis.branches
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compiler.tree.escape-analysis.nodes compiler.tree.recursive
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disjoint-sets fry kernel namespaces sequences ;
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IN: compiler.tree.escape-analysis.recursive
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: congruent? ( alloc1 alloc2 -- ? )
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{
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{ [ 2dup [ f eq? ] either? ] [ eq? ] }
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{ [ 2dup [ t eq? ] either? ] [ eq? ] }
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{ [ 2dup [ length ] bi@ = not ] [ 2drop f ] }
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[ [ [ allocation ] bi@ congruent? ] 2all? ]
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} cond ;
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: check-fixed-point ( node alloc1 alloc2 -- )
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[ congruent? ] 2all? [ drop ] [ label>> f >>fixed-point drop ] if ;
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: node-input-allocations ( node -- allocations )
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in-d>> [ allocation ] map ;
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: node-output-allocations ( node -- allocations )
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out-d>> [ allocation ] map ;
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: recursive-stacks ( #enter-recursive -- stacks )
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recursive-phi-in
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escaping-values get '[ [ _ disjoint-set-member? ] all? ] filter
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flip ;
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: analyze-recursive-phi ( #enter-recursive -- )
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[ ] [ recursive-stacks ] [ out-d>> ] tri
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[ [ merge-values ] 2each ]
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[
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[ (merge-allocations) ] dip
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[ [ allocation ] map check-fixed-point ]
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[ record-allocations ]
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2bi
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] 2bi ;
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M: #recursive escape-analysis* ( #recursive -- )
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[ label>> return>> in-d>> introduce-values ]
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[
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[
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child>>
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[ first out-d>> introduce-values ]
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[ first analyze-recursive-phi ]
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[ (escape-analysis) ]
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tri
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] until-fixed-point
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] bi ;
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M: #enter-recursive escape-analysis* ( #enter-recursive -- )
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#! Handled by #recursive
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drop ;
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M: #call-recursive escape-analysis* ( #call-label -- )
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[ ] [ label>> return>> ] [ node-output-allocations ] tri
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[ [ node-input-allocations ] dip check-fixed-point ]
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[ drop swap [ in-d>> ] [ out-d>> ] bi* copy-values ]
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3bi ;
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M: #return-recursive escape-analysis* ( #return-recursive -- )
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[ call-next-method ]
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[
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[ in-d>> ] [ label>> calls>> ] bi
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[ node>> out-d>> escaping-values get '[ _ equate ] 2each ] with each
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] bi ;
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