factor/basis/compiler/tree/escape-analysis/branches/branches.factor

37 lines
1.2 KiB
Factor

! Copyright (C) 2008 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors kernel namespaces sequences sets fry columns
stack-checker.branches
compiler.tree
compiler.tree.propagation.branches
compiler.tree.escape-analysis.nodes
compiler.tree.escape-analysis.allocations ;
IN: compiler.tree.escape-analysis.branches
M: #branch escape-analysis*
[ in-d>> add-escaping-values ]
[ live-children sift [ (escape-analysis) ] each ]
bi ;
: (merge-allocations) ( values -- allocation )
[
dup [ allocation ] map sift [ drop f ] [
dup [ t eq? not ] all? [
dup [ length ] map all-equal? [
nip flip
[ (merge-allocations) ] [ [ merge-slots ] map ] bi
[ record-allocations ] keep
] [ drop add-escaping-values t ] if
] [ drop add-escaping-values t ] if
] if-empty
] map ;
: merge-allocations ( in-values out-values -- )
[ [ remove-bottom ] map ] dip
[ [ merge-values ] 2each ]
[ [ (merge-allocations) ] dip record-allocations ]
2bi ;
M: #phi escape-analysis*
[ phi-in-d>> flip ] [ out-d>> ] bi merge-allocations ;