84 lines
2.3 KiB
Factor
84 lines
2.3 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: arrays fry namespaces sequences kernel generic assocs
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classes vectors accessors combinators sets
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stack-checker.state
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stack-checker.branches
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compiler.tree
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compiler.tree.combinators ;
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FROM: namespaces => set ;
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FROM: sets => members ;
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IN: compiler.tree.def-use
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SYMBOL: def-use
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TUPLE: definition value node uses ;
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: <definition> ( node value -- definition )
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definition new
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swap >>value
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swap >>node
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V{ } clone >>uses ;
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ERROR: no-def-error value ;
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: (def-of) ( value def-use -- definition )
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?at [ no-def-error ] unless ; inline
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: def-of ( value -- definition )
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def-use get (def-of) ;
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ERROR: multiple-defs-error ;
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: (def-value) ( node value def-use -- )
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2dup key? [
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multiple-defs-error
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] [
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[ [ <definition> ] keep ] dip set-at
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] if ; inline
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: def-value ( node value -- )
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def-use get (def-value) ;
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: def-values ( node values -- )
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def-use get '[ _ (def-value) ] with each ;
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: used-by ( value -- nodes ) def-of uses>> ;
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: use-value ( node value -- ) used-by push ;
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: use-values ( node values -- )
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def-use get '[ _ (def-of) uses>> push ] with each ;
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: defined-by ( value -- node ) def-of node>> ;
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GENERIC: node-uses-values ( node -- values )
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M: #introduce node-uses-values drop f ;
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M: #push node-uses-values drop f ;
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M: #phi node-uses-values phi-in-d>> concat remove-bottom members ;
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M: #declare node-uses-values drop f ;
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M: #terminate node-uses-values [ in-d>> ] [ in-r>> ] bi append ;
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M: #shuffle node-uses-values [ in-d>> ] [ in-r>> ] bi append ;
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M: #alien-callback node-uses-values drop f ;
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M: node node-uses-values in-d>> ;
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GENERIC: node-defs-values ( node -- values )
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M: #shuffle node-defs-values [ out-d>> ] [ out-r>> ] bi append ;
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M: #branch node-defs-values drop f ;
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M: #declare node-defs-values drop f ;
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M: #return node-defs-values drop f ;
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M: #recursive node-defs-values drop f ;
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M: #terminate node-defs-values drop f ;
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M: #alien-callback node-defs-values drop f ;
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M: node node-defs-values out-d>> ;
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: node-def-use ( node -- )
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[ dup node-uses-values use-values ]
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[ dup node-defs-values def-values ] bi ;
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: compute-def-use ( node -- node )
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H{ } clone def-use set
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dup [ node-def-use ] each-node ;
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