130 lines
3.7 KiB
Factor
130 lines
3.7 KiB
Factor
! :folding=indent:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2004 Slava Pestov.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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IN: inference
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USE: interpreter
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USE: kernel
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USE: lists
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USE: math
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USE: namespaces
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USE: words
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USE: vectors
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! We build a dataflow graph for the compiler.
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SYMBOL: dataflow-graph
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! Label nodes have the node-label variable set.
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SYMBOL: #label
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! A label that is not called recursively at all, or only tail
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! recursively. The optimizer changes some #labels to
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! #simple-labels.
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SYMBOL: #simple-label
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SYMBOL: #call ( non-tail call )
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SYMBOL: #call-label
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SYMBOL: #push ( literal )
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SYMBOL: #ifte
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SYMBOL: #dispatch
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! This is purely a marker for values we retain after a
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! conditional. It does not generate code, but merely alerts the
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! dataflow optimizer to the fact these values must be retained.
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SYMBOL: #values
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SYMBOL: #return
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SYMBOL: #drop
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SYMBOL: #dup
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SYMBOL: #swap
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SYMBOL: #over
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SYMBOL: #pick
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SYMBOL: #>r
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SYMBOL: #r>
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SYMBOL: node-consume-d
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SYMBOL: node-produce-d
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SYMBOL: node-consume-r
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SYMBOL: node-produce-r
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SYMBOL: node-op
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SYMBOL: node-label
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! #push nodes have this field set to the value being pushed.
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! #call nodes have this as the word being called
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SYMBOL: node-param
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: <dataflow-node> ( param op -- node )
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<namespace> [
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node-op set
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node-param set
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[ ] node-consume-d set
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[ ] node-produce-d set
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[ ] node-consume-r set
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[ ] node-produce-r set
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] extend ;
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: node-inputs ( d-count r-count -- )
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#! Execute in the node's namespace.
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meta-r get vector-tail* node-consume-r set
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meta-d get vector-tail* node-consume-d set ;
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: dataflow-inputs ( [ in | out ] node -- )
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[ car 0 node-inputs ] bind ;
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: node-outputs ( d-count r-count -- )
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#! Execute in the node's namespace.
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meta-r get vector-tail* node-produce-r set
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meta-d get vector-tail* node-produce-d set ;
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: dataflow-outputs ( [ in | out ] node -- )
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[ cdr 0 node-outputs ] bind ;
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: get-dataflow ( -- IR )
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dataflow-graph get reverse ;
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: dataflow, ( param op -- node )
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#! Add a node to the dataflow IR.
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<dataflow-node> dup dataflow-graph cons@ ;
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: dataflow-drop, ( -- )
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#! Remove the top stack element and add a dataflow node
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#! noting this.
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f #drop dataflow, [ 1 0 node-inputs ] bind ;
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: apply-dataflow ( dataflow name default -- )
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#! For the dataflow node, look up named word property,
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#! if its not defined, apply default quotation to
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#! ( node ) otherwise apply property quotation to
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#! ( node ).
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>r >r dup [ node-op get ] bind r> word-property dup [
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call r> drop
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] [
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drop r> call
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] ifte ;
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