compiler.cfg.linear-scan: debugging spilling and resolve pass
parent
1b355bcc95
commit
a19f22ec82
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@ -25,7 +25,7 @@ IN: compiler.cfg.linear-scan.allocation
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_ add-use-position
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_ add-use-position
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] each ;
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] each ;
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: compute-free-pos ( new -- free-pos )
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: register-status ( new -- free-pos )
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dup free-positions
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dup free-positions
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[ inactive-positions ] [ active-positions ] [ nip ] 2tri
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[ inactive-positions ] [ active-positions ] [ nip ] 2tri
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>alist alist-max ;
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>alist alist-max ;
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@ -45,7 +45,7 @@ IN: compiler.cfg.linear-scan.allocation
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: assign-register ( new -- )
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: assign-register ( new -- )
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dup coalesce? [ coalesce ] [
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dup coalesce? [ coalesce ] [
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dup compute-free-pos {
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dup register-status {
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{ [ dup no-free-registers? ] [ drop assign-blocked-register ] }
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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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{ [ 2dup register-available? ] [ register-available ] }
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[ register-partially-available ]
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[ register-partially-available ]
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@ -1,7 +1,7 @@
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! Copyright (C) 2009 Slava Pestov.
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! Copyright (C) 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors arrays assocs combinators fry hints kernel locals
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USING: accessors arrays assocs combinators fry hints kernel locals
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math sequences sets sorting splitting compiler.utilities
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math sequences sets sorting splitting compiler.utilities namespaces
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compiler.cfg.linear-scan.allocation.state
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compiler.cfg.linear-scan.allocation.state
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compiler.cfg.linear-scan.allocation.splitting
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compiler.cfg.linear-scan.allocation.splitting
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compiler.cfg.linear-scan.live-intervals ;
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compiler.cfg.linear-scan.live-intervals ;
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@ -10,42 +10,79 @@ IN: compiler.cfg.linear-scan.allocation.spilling
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: find-use ( live-interval n quot -- elt )
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: find-use ( live-interval n quot -- elt )
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[ uses>> ] 2dip curry find nip ; inline
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[ uses>> ] 2dip curry find nip ; inline
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: spill-existing? ( new existing -- ? )
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#! Test if 'new' will be used before 'existing'.
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over start>> '[ _ [ > ] find-use -1 or ] bi@ < ;
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: interval-to-spill ( active-intervals current -- live-interval )
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: interval-to-spill ( active-intervals current -- live-interval )
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#! We spill the interval with the most distant use location.
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#! We spill the interval with the most distant use location.
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start>> '[ dup _ [ >= ] find-use ] { } map>assoc
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#! If an active interval has no more use positions, find-use
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#! returns f. This occurs if the interval is a split. In
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#! this case, we prefer to spill this interval always.
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start>> '[ dup _ [ >= ] find-use 1/0. or ] { } map>assoc
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alist-max first ;
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alist-max first ;
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ERROR: bad-live-ranges interval ;
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: check-ranges ( live-interval -- )
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check-allocation? get [
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dup ranges>> [ [ from>> ] [ to>> ] bi <= ] all?
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[ drop ] [ bad-live-ranges ] if
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] [ drop ] if ;
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: trim-before-ranges ( live-interval n -- )
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[ ranges>> ] [ uses>> last ] bi
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[ '[ from>> _ <= ] filter-here ]
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[ swap last (>>to) ]
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2bi ;
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: trim-after-ranges ( live-interval n -- )
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[ ranges>> ] [ uses>> first ] bi
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[ '[ to>> _ >= ] filter-here ]
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[ swap first (>>from) ]
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2bi ;
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: split-for-spill ( live-interval n -- before after )
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: split-for-spill ( live-interval n -- before after )
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split-interval
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split-interval
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[
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{
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[ [ ranges>> last ] [ uses>> last ] bi >>to drop ]
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[ [ trim-before-ranges ] [ trim-after-ranges ] bi* ]
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[ [ ranges>> first ] [ uses>> first ] bi >>from drop ] bi*
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[ [ compute-start/end ] bi@ ]
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]
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[ [ check-ranges ] bi@ ]
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[ [ compute-start/end ] bi@ ]
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[ ]
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[ ]
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} 2cleave ;
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2tri ;
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: assign-spill ( before after -- before after )
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: assign-spill ( live-interval -- live-interval )
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#! If it has been spilled already, reuse spill location.
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dup reload-from>>
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over reload-from>>
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[ dup vreg>> reg-class>> next-spill-location ] unless*
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[ over vreg>> reg-class>> next-spill-location ] unless*
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>>spill-to ;
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[ >>spill-to ] [ >>reload-from ] bi-curry bi* ;
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: assign-reload ( before after -- before after )
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over spill-to>> >>reload-from ;
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: split-and-spill ( new existing -- before after )
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: split-and-spill ( new existing -- before after )
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swap start>> split-for-spill assign-spill ;
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swap start>> split-for-spill assign-spill assign-reload ;
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: reuse-register ( new existing -- )
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[ nip delete-active ]
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[ reg>> >>reg add-active ] 2bi ;
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: spill-existing? ( new existing -- ? )
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#! Test if 'new' will be used before 'existing'.
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over start>> '[ _ [ > ] find-use -1 or ] bi@ < ;
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: spill-existing ( new existing -- )
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: spill-existing ( new existing -- )
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#! Our new interval will be used before the active interval
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#! Our new interval will be used before the active interval
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#! with the most distant use location. Spill the existing
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#! with the most distant use location. Spill the existing
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#! interval, then process the new interval and the tail end
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#! interval, then process the new interval and the tail end
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#! of the existing interval again.
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#! of the existing interval again.
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[ nip delete-active ]
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[ reuse-register ]
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[ reg>> >>reg add-active ]
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[ split-and-spill [ add-handled ] [ add-unhandled ] bi* ] 2bi ;
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[ split-and-spill [ add-handled ] [ add-unhandled ] bi* ] 2tri ;
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: spill-live-out? ( new existing -- ? )
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[ start>> ] [ uses>> last ] bi* > ;
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: spill-live-out ( new existing -- )
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#! The existing interval is never used again. Spill it and
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#! re-use the register.
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assign-spill
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[ reuse-register ]
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[ nip add-handled ] 2bi ;
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: spill-new ( new existing -- )
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: spill-new ( new existing -- )
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#! Our new interval will be used after the active interval
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#! Our new interval will be used after the active interval
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@ -55,6 +92,9 @@ IN: compiler.cfg.linear-scan.allocation.spilling
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[ dup split-and-spill add-unhandled ] dip spill-existing ;
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[ dup split-and-spill add-unhandled ] dip spill-existing ;
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: assign-blocked-register ( new -- )
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: assign-blocked-register ( new -- )
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[ dup vreg>> active-intervals-for ] keep interval-to-spill
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[ dup vreg>> active-intervals-for ] keep interval-to-spill {
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2dup spill-existing? [ spill-existing ] [ spill-new ] if ;
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{ [ 2dup spill-live-out? ] [ spill-live-out ] }
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{ [ 2dup spill-existing? ] [ spill-existing ] }
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[ spill-new ]
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} cond ;
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@ -50,8 +50,11 @@ ERROR: already-spilled ;
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: handle-spill ( live-interval -- )
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: handle-spill ( live-interval -- )
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dup spill-to>> [ [ record-spill ] [ insert-spill ] bi ] [ drop ] if ;
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dup spill-to>> [ [ record-spill ] [ insert-spill ] bi ] [ drop ] if ;
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: first-split ( live-interval -- live-interval' )
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dup split-before>> [ first-split ] [ ] ?if ;
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: next-interval ( live-interval -- live-interval' )
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: next-interval ( live-interval -- live-interval' )
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split-next>> dup split-before>> [ next-interval ] [ ] ?if ;
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split-next>> first-split ;
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: insert-copy ( live-interval -- )
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: insert-copy ( live-interval -- )
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{
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{
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@ -156,6 +156,31 @@ check-assignment? on
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} 0 split-for-spill [ f >>split-next ] bi@
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} 0 split-for-spill [ f >>split-next ] bi@
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] unit-test
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] unit-test
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[
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T{ live-interval
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{ vreg T{ vreg { reg-class int-regs } { n 1 } } }
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{ start 0 }
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{ end 0 }
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{ uses V{ 0 } }
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{ ranges V{ T{ live-range f 0 0 } } }
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}
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T{ live-interval
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{ vreg T{ vreg { reg-class int-regs } { n 1 } } }
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{ start 20 }
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{ end 30 }
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{ uses V{ 20 30 } }
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{ ranges V{ T{ live-range f 20 30 } } }
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}
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] [
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T{ live-interval
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{ vreg T{ vreg { reg-class int-regs } { n 1 } } }
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{ start 0 }
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{ end 30 }
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{ uses V{ 0 20 30 } }
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{ ranges V{ T{ live-range f 0 8 } T{ live-range f 10 18 } T{ live-range f 20 30 } } }
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} 10 split-for-spill [ f >>split-next ] bi@
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] unit-test
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[
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[
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T{ live-interval
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T{ live-interval
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{ vreg T{ vreg { reg-class int-regs } { n 1 } } }
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{ vreg T{ vreg { reg-class int-regs } { n 1 } } }
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@ -1419,7 +1444,7 @@ USING: math.private ;
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relevant-ranges intersect-live-ranges
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relevant-ranges intersect-live-ranges
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] unit-test
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] unit-test
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! compute-free-pos had problems because it used map>assoc where the sequence
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! register-status had problems because it used map>assoc where the sequence
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! had multiple keys
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! had multiple keys
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[ { 0 10 } ] [
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[ { 0 10 } ] [
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H{ { int-regs { 0 1 } } } registers set
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H{ { int-regs { 0 1 } } } registers set
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@ -1468,7 +1493,7 @@ USING: math.private ;
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{ ranges V{ T{ live-range f 8 10 } } }
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{ ranges V{ T{ live-range f 8 10 } } }
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{ uses V{ 8 10 } }
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{ uses V{ 8 10 } }
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}
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}
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compute-free-pos
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register-status
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] unit-test
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] unit-test
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! Bug in live spill slots calculation
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! Bug in live spill slots calculation
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@ -1531,18 +1556,16 @@ V{
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SYMBOL: linear-scan-result
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SYMBOL: linear-scan-result
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:: test-linear-scan-on-cfg ( regs -- )
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:: test-linear-scan-on-cfg ( regs -- )
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[ ] [
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cfg new 0 get >>entry
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cfg new 0 get >>entry
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compute-predecessors
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compute-predecessors
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compute-liveness
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compute-liveness
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dup reverse-post-order
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dup reverse-post-order
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{ { int-regs regs } } (linear-scan)
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{ { int-regs regs } } (linear-scan)
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flatten-cfg 1array mr. ;
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flatten-cfg 1array mr.
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] unit-test ;
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! This test has a critical edge -- do we care about these?
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! This test has a critical edge -- do we care about these?
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! { 1 2 } test-linear-scan-on-cfg
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! [ { 1 2 } test-linear-scan-on-cfg ] unit-test
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! Bug in inactive interval handling
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! Bug in inactive interval handling
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! [ rot dup [ -rot ] when ]
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! [ rot dup [ -rot ] when ]
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@ -1619,7 +1642,7 @@ V{
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test-diamond
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test-diamond
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{ 1 2 3 4 } test-linear-scan-on-cfg
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[ ] [ { 1 2 3 4 } test-linear-scan-on-cfg ] unit-test
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! Similar to the above
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! Similar to the above
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! [ swap dup [ rot ] when ]
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! [ swap dup [ rot ] when ]
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@ -1705,7 +1728,7 @@ V{
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test-diamond
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test-diamond
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{ 1 2 3 4 } test-linear-scan-on-cfg
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[ ] [ { 1 2 3 4 } test-linear-scan-on-cfg ] unit-test
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! compute-live-registers was inaccurate since it didn't take
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! compute-live-registers was inaccurate since it didn't take
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! lifetime holes into account
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! lifetime holes into account
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@ -1758,7 +1781,7 @@ V{
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test-diamond
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test-diamond
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{ 1 2 3 4 } test-linear-scan-on-cfg
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[ ] [ { 1 2 3 4 } test-linear-scan-on-cfg ] unit-test
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! Inactive interval handling: splitting active interval
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! Inactive interval handling: splitting active interval
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! if it fits in lifetime hole only partially
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! if it fits in lifetime hole only partially
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@ -1791,7 +1814,7 @@ V{
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test-diamond
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test-diamond
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{ 1 2 } test-linear-scan-on-cfg
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[ ] [ { 1 2 } test-linear-scan-on-cfg ] unit-test
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USING: classes ;
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USING: classes ;
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@ -1830,7 +1853,7 @@ V{
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test-diamond
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test-diamond
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{ 1 2 } test-linear-scan-on-cfg
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[ ] [ { 1 2 } test-linear-scan-on-cfg ] unit-test
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[ _spill ] [ 2 get instructions>> first class ] unit-test
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[ _spill ] [ 2 get instructions>> first class ] unit-test
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@ -1,7 +1,7 @@
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! Copyright (C) 2008, 2009 Slava Pestov.
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! Copyright (C) 2008, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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! See http://factorcode.org/license.txt for BSD license.
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USING: namespaces kernel assocs accessors sequences math math.order fry
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USING: namespaces kernel assocs accessors sequences math math.order fry
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binary-search combinators compiler.cfg.instructions compiler.cfg.registers
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combinators compiler.cfg.instructions compiler.cfg.registers
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compiler.cfg.def-use compiler.cfg.liveness compiler.cfg ;
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compiler.cfg.def-use compiler.cfg.liveness compiler.cfg ;
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IN: compiler.cfg.linear-scan.live-intervals
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IN: compiler.cfg.linear-scan.live-intervals
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@ -40,11 +40,11 @@ T{ live-interval
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}
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}
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[ f ] [
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[ f ] [
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0 get test-live-interval-1 spill-to
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test-live-interval-1 0 get spill-to
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] unit-test
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] unit-test
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[ 0 ] [
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[ 0 ] [
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1 get test-live-interval-1 spill-to
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test-live-interval-1 1 get spill-to
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] unit-test
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] unit-test
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CONSTANT: test-live-interval-2
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CONSTANT: test-live-interval-2
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@ -58,11 +58,11 @@ T{ live-interval
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}
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}
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[ 0 ] [
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[ 0 ] [
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0 get test-live-interval-2 reload-from
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test-live-interval-2 0 get reload-from
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] unit-test
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] unit-test
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[ f ] [
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[ f ] [
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1 get test-live-interval-2 reload-from
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test-live-interval-2 1 get reload-from
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] unit-test
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] unit-test
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[
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[
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@ -136,10 +136,14 @@ T{ live-interval
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] unit-test
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] unit-test
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[
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[
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{ T{ _spill { src 4 } { class int-regs } { n spill-temp } } }
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{
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T{ _spill { src 3 } { class int-regs } { n 4 } }
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T{ _reload { dst 2 } { class int-regs } { n 1 } }
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}
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] [
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] [
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{
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{
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T{ register->memory { from 4 } { to 4 } { reg-class int-regs } }
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T{ register->memory { from 3 } { to 4 } { reg-class int-regs } }
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T{ memory->register { from 1 } { to 2 } { reg-class int-regs } }
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} mapping-instructions
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} mapping-instructions
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] unit-test
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] unit-test
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@ -25,13 +25,16 @@ SYNTAX: OPERATION:
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>>
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>>
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: reload-from ( bb live-interval -- n/f )
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: insn-in-block? ( insn# bb -- ? )
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2dup [ block-from ] [ start>> ] bi* =
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[ block-from ] [ block-to ] bi between? ;
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[ nip reload-from>> ] [ 2drop f ] if ;
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: spill-to ( bb live-interval -- n/f )
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: reload-from ( live-interval bb -- n/f )
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2dup [ block-to ] [ end>> ] bi* =
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2dup [ start>> ] dip insn-in-block?
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[ nip spill-to>> ] [ 2drop f ] if ;
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[ drop reload-from>> ] [ 2drop f ] if ;
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: spill-to ( live-interval bb -- n/f )
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2dup [ end>> ] dip insn-in-block?
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[ drop spill-to>> ] [ 2drop f ] if ;
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OPERATION: memory->memory spill-to>> reload-from>>
|
OPERATION: memory->memory spill-to>> reload-from>>
|
||||||
OPERATION: register->memory reg>> reload-from>>
|
OPERATION: register->memory reg>> reload-from>>
|
||||||
|
@ -39,12 +42,12 @@ OPERATION: memory->register spill-to>> reg>>
|
||||||
OPERATION: register->register reg>> reg>>
|
OPERATION: register->register reg>> reg>>
|
||||||
|
|
||||||
:: add-mapping ( bb1 bb2 li1 li2 -- )
|
:: add-mapping ( bb1 bb2 li1 li2 -- )
|
||||||
bb2 li2 reload-from [
|
li2 bb2 reload-from [
|
||||||
bb1 li1 spill-to
|
li1 bb1 spill-to
|
||||||
[ li1 li2 memory->memory ]
|
[ li1 li2 memory->memory ]
|
||||||
[ li1 li2 register->memory ] if
|
[ li1 li2 register->memory ] if
|
||||||
] [
|
] [
|
||||||
bb1 li1 spill-to
|
li1 bb1 spill-to
|
||||||
[ li1 li2 memory->register ]
|
[ li1 li2 memory->register ]
|
||||||
[ li1 li2 register->register ] if
|
[ li1 li2 register->register ] if
|
||||||
] if ;
|
] if ;
|
||||||
|
@ -68,10 +71,10 @@ M: memory->memory >insn
|
||||||
[ from>> ] [ to>> ] bi = [ "Not allowed" throw ] unless ;
|
[ from>> ] [ to>> ] bi = [ "Not allowed" throw ] unless ;
|
||||||
|
|
||||||
M: register->memory >insn
|
M: register->memory >insn
|
||||||
[ from>> ] [ reg-class>> ] bi spill-temp _spill ;
|
[ from>> ] [ reg-class>> ] [ to>> ] tri _spill ;
|
||||||
|
|
||||||
M: memory->register >insn
|
M: memory->register >insn
|
||||||
[ to>> ] [ reg-class>> ] bi spill-temp _reload ;
|
[ to>> ] [ reg-class>> ] [ from>> ] tri _reload ;
|
||||||
|
|
||||||
M: register->register >insn
|
M: register->register >insn
|
||||||
[ to>> ] [ from>> ] [ reg-class>> ] tri _copy ;
|
[ to>> ] [ from>> ] [ reg-class>> ] tri _copy ;
|
||||||
|
@ -82,10 +85,10 @@ M: memory->memory >collision-table
|
||||||
[ from>> ] [ to>> ] bi = [ "Not allowed" throw ] unless ;
|
[ from>> ] [ to>> ] bi = [ "Not allowed" throw ] unless ;
|
||||||
|
|
||||||
M: register->memory >collision-table
|
M: register->memory >collision-table
|
||||||
[ from>> ] [ reg-class>> ] bi spill-temp _spill ;
|
[ from>> ] [ reg-class>> ] [ to>> ] tri _spill ;
|
||||||
|
|
||||||
M: memory->register >collision-table
|
M: memory->register >collision-table
|
||||||
[ to>> ] [ reg-class>> ] bi spill-temp _reload ;
|
[ to>> ] [ reg-class>> ] [ from>> ] tri _reload ;
|
||||||
|
|
||||||
M: register->register >collision-table
|
M: register->register >collision-table
|
||||||
[ to>> ] [ from>> ] [ reg-class>> ] tri _copy ;
|
[ to>> ] [ from>> ] [ reg-class>> ] tri _copy ;
|
||||||
|
|
Loading…
Reference in New Issue