1 ! Copyright (C) 2008 Slava Pestov.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors assocs compiler.tree compiler.tree.combinators
4 fry kernel namespaces sequences stack-checker.branches ;
5 FROM: namespaces => set ;
7 IN: compiler.tree.def-use
11 TUPLE: definition value node uses ;
13 : <definition> ( node value -- definition )
19 ERROR: no-def-error value ;
21 : (def-of) ( value def-use -- definition )
22 ?at [ no-def-error ] unless ; inline
24 : def-of ( value -- definition )
25 def-use get (def-of) ;
27 ERROR: multiple-defs-error ;
29 : (def-value) ( node value def-use -- )
33 [ [ <definition> ] keep ] dip set-at
36 : def-value ( node value -- )
37 def-use get (def-value) ;
39 : def-values ( node values -- )
40 def-use get '[ _ (def-value) ] with each ;
42 : used-by ( value -- nodes ) def-of uses>> ;
44 : use-value ( node value -- ) used-by push ;
46 : use-values ( node values -- )
47 def-use get '[ _ (def-of) uses>> push ] with each ;
49 : defined-by ( value -- node ) def-of node>> ;
51 GENERIC: node-uses-values ( node -- values )
53 M: #introduce node-uses-values drop f ;
54 M: #push node-uses-values drop f ;
55 M: #phi node-uses-values phi-in-d>> concat remove-bottom sets:members ;
56 M: #declare node-uses-values drop f ;
57 M: #terminate node-uses-values [ in-d>> ] [ in-r>> ] bi append ;
58 M: #shuffle node-uses-values [ in-d>> ] [ in-r>> ] bi append ;
59 M: #alien-callback node-uses-values drop f ;
60 M: node node-uses-values in-d>> ;
62 GENERIC: node-defs-values ( node -- values )
64 M: #shuffle node-defs-values [ out-d>> ] [ out-r>> ] bi append ;
65 M: #branch node-defs-values drop f ;
66 M: #declare node-defs-values drop f ;
67 M: #return node-defs-values drop f ;
68 M: #recursive node-defs-values drop f ;
69 M: #terminate node-defs-values drop f ;
70 M: #alien-callback node-defs-values drop f ;
71 M: node node-defs-values out-d>> ;
73 : node-def-use ( node -- )
74 [ dup node-uses-values use-values ]
75 [ dup node-defs-values def-values ] bi ;
77 : compute-def-use ( node -- node )
78 H{ } clone def-use set
79 dup [ node-def-use ] each-node ;