61 lines
1.9 KiB
Factor
61 lines
1.9 KiB
Factor
! Copyright (C) 2008, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors assocs heaps kernel namespaces sequences fry math
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math.order combinators arrays sorting compiler.utilities
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compiler.cfg.linear-scan.live-intervals
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compiler.cfg.linear-scan.allocation.coalescing
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compiler.cfg.linear-scan.allocation.spilling
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compiler.cfg.linear-scan.allocation.splitting
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compiler.cfg.linear-scan.allocation.state ;
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IN: compiler.cfg.linear-scan.allocation
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: active-positions ( new assoc -- )
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[ vreg>> active-intervals-for ] dip
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'[ [ 0 ] dip reg>> _ add-use-position ] each ;
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: inactive-positions ( new assoc -- )
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[ [ vreg>> inactive-intervals-for ] keep ] dip
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'[
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[ _ relevant-ranges intersect-live-ranges 1/0. or ] [ reg>> ] bi
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_ add-use-position
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] each ;
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: register-status ( new -- free-pos )
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dup free-positions
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[ inactive-positions ] [ active-positions ] [ nip ] 2tri
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>alist alist-max ;
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: no-free-registers? ( result -- ? )
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second 0 = ; inline
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: assign-register ( new -- )
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dup coalesce? [ coalesce ] [
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dup register-status {
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{ [ dup no-free-registers? ] [ drop assign-blocked-register ] }
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{ [ 2dup register-available? ] [ register-available ] }
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[ drop assign-blocked-register ]
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} cond
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] if ;
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: handle-interval ( live-interval -- )
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[
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start>>
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[ progress set ]
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[ deactivate-intervals ]
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[ activate-intervals ] tri
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] [ assign-register ] bi ;
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: (allocate-registers) ( -- )
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unhandled-intervals get [ handle-interval ] slurp-heap ;
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: finish-allocation ( -- )
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active-intervals inactive-intervals
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[ get values [ handled-intervals get push-all ] each ] bi@ ;
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: allocate-registers ( live-intervals machine-registers -- live-intervals )
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init-allocator
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init-unhandled
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(allocate-registers)
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finish-allocation
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handled-intervals get ;
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