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Fixing write-barrier elimination; adding bb as a parameter to join-sets in dataflow analysis

db4
Daniel Ehrenberg 2009-08-12 23:52:29 -05:00
parent 1a7ab59f56
commit d35e1eb76c
5 changed files with 12 additions and 21 deletions
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6
basis/compiler/cfg/dataflow-analysis/dataflow-analysis.factor
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@ -5,7 +5,7 @@ namespaces functors compiler.cfg.rpo compiler.cfg.utilities
compiler.cfg.predecessors compiler.cfg ;
IN: compiler.cfg.dataflow-analysis
GENERIC: join-sets ( sets dfa -- set )
GENERIC: join-sets ( sets bb dfa -- set )
GENERIC: transfer-set ( in-set bb dfa -- out-set )
GENERIC: block-order ( cfg dfa -- bbs )
GENERIC: successors ( bb dfa -- seq )
@ -23,7 +23,7 @@ GENERIC# compute-in-set 2 ( bb out-sets dfa -- set )
M: kill-block compute-in-set 3drop f ;
M:: basic-block compute-in-set ( bb out-sets dfa -- set )
bb dfa predecessors [ out-sets at ] map dfa join-sets ;
bb dfa predecessors [ out-sets at ] map bb dfa join-sets ;
:: update-in-set ( bb in-sets out-sets dfa -- ? )
bb out-sets dfa compute-in-set
@ -56,7 +56,7 @@ M:: basic-block compute-out-set ( bb in-sets dfa -- set )
in-sets
out-sets ; inline
M: dataflow-analysis join-sets drop assoc-refine ;
M: dataflow-analysis join-sets 2drop assoc-refine ;
FUNCTOR: define-analysis ( name -- )

2
basis/compiler/cfg/liveness/liveness.factor
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@ -28,4 +28,4 @@ M: live-analysis transfer-set
drop instructions>> transfer-liveness ;
M: live-analysis join-sets
drop assoc-combine ;
2drop assoc-combine ;

4
basis/compiler/cfg/stacks/global/global.factor
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@ -21,7 +21,7 @@ BACKWARD-ANALYSIS: live
M: live-analysis transfer-set drop transfer-peeked-locs ;
M: live-analysis join-sets drop assoc-combine ;
M: live-analysis join-sets 2drop assoc-combine ;
! A stack location is available at a location if all paths from
! the entry block to the location load the location into a
@ -56,4 +56,4 @@ M: dead-analysis transfer-set
[ compute-dead-sets ]
[ compute-avail-sets ]
[ ]
} cleave ;
} cleave ;

4
basis/compiler/cfg/stacks/uninitialized/uninitialized.factor
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@ -65,7 +65,7 @@ M: uninitialized-analysis transfer-set ( pair bb analysis -- pair' )
drop [ prepare ] dip visit-block finish ;
M: uninitialized-analysis join-sets ( sets analysis -- pair )
drop sift [ f ] [ [ ] [ [ (join-sets) ] 2map ] map-reduce ] if-empty ;
2drop sift [ f ] [ [ ] [ [ (join-sets) ] 2map ] map-reduce ] if-empty ;
: uninitialized-locs ( bb -- locs )
uninitialized-in dup [
@ -73,4 +73,4 @@ M: uninitialized-analysis join-sets ( sets analysis -- pair )
[ [ <ds-loc> ] (uninitialized-locs) ]
[ [ <rs-loc> ] (uninitialized-locs) ]
bi* append
] when ;
] when ;

17
basis/compiler/cfg/write-barrier/write-barrier.factor
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@ -36,11 +36,8 @@ FORWARD-ANALYSIS: safe
: has-allocation? ( bb -- ? )
instructions>> [ { [ ##allocation? ] [ ##call? ] } 1|| ] any? ;
: (safe-in) ( maybe-safe-in bb -- safe-in )
has-allocation? not swap and [ H{ } clone ] unless* ;
M: safe-analysis transfer-set
drop [ (safe-in) ] keep
drop [ H{ } assoc-clone-like ] dip
instructions>> over '[
dup ##write-barrier? [
src>> _ conjoin
@ -48,19 +45,13 @@ M: safe-analysis transfer-set
] each ;
M: safe-analysis join-sets
! maybe this would be better if we had access to the basic block
! then in this definition, it would check for has-allocation?
! (once rather than twice)
drop assoc-refine ;
: safe-start ( bb -- set )
[ safe-in ] keep (safe-in) ;
drop has-allocation? [ drop H{ } clone ] [ assoc-refine ] if ;
: write-barriers-step ( bb -- )
dup safe-start safe set
dup safe-in H{ } assoc-clone-like safe set
H{ } clone mutated set
instructions>> [ eliminate-write-barrier ] filter-here ;
: eliminate-write-barriers ( cfg -- cfg' )
dup compute-safe-sets
dup compute-safe-sets
dup [ write-barriers-step ] each-basic-block ;