39 lines
1019 B
Factor
39 lines
1019 B
Factor
! Copyright (C) 2004, 2006 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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IN: optimizer
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USING: compiler generic hashtables inference io kernel
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lists math namespaces sequences vectors ;
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SYMBOL: optimizer-changed
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GENERIC: optimize-node* ( node -- node/t )
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: keep-optimizing ( node -- node ? )
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dup optimize-node* dup t =
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[ drop f ] [ nip keep-optimizing t or ] if ;
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: optimize-node ( node -- node )
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[
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keep-optimizing [ optimizer-changed on ] when
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] map-nodes ;
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: optimize ( node -- node )
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dup kill-values dup infer-classes [
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optimizer-changed off
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optimize-node
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optimizer-changed get
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] with-node-iterator [ optimize ] when ;
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! Generic nodes
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M: f optimize-node* drop t ;
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M: node optimize-node* ( node -- t ) drop t ;
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! #push
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M: #push optimize-node* ( node -- node/t )
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dup node-out-d empty? [ node-successor ] [ drop t ] if ;
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! #return
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M: #return optimize-node* ( node -- node/t )
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node-successor [ node-successor ] [ t ] if* ;
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