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Remove some unnecessary work from stack-analysis pass

db4
Slava Pestov 2009-07-17 18:39:41 -05:00
parent 50a86a8d93
commit 43fab5b2ae
1 changed files with 7 additions and 13 deletions
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8
basis/compiler/cfg/stack-analysis/stack-analysis.factor
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@ -92,14 +92,11 @@ M: poison-insn visit call-next-method poison-state ;
M: kill-vreg-insn visit sync-state , ;
! Maps basic-blocks to states
SYMBOLS: state-in state-out ;
SYMBOL: state-out
: block-in-state ( bb -- states )
dup predecessors>> state-out get '[ _ at ] map merge-states ;
: set-block-in-state ( state bb -- )
[ clone ] dip state-in get set-at ;
: set-block-out-state ( state bb -- )
[ clone ] dip state-out get set-at ;
@ -109,21 +106,18 @@ SYMBOLS: state-in state-out ;
[
dup basic-block set
dup block-in-state
[ swap set-block-in-state ] [
state [
[ instructions>> [ visit ] each ]
[ [ state get ] dip set-block-out-state ]
[ ]
tri
] with-variable
] 2bi
] V{ } make >>instructions drop ;
: stack-analysis ( cfg -- cfg' )
[
<hashed-dlist> work-list set
H{ } clone copies set
H{ } clone state-in set
H{ } clone state-out set
dup [ visit-block ] each-basic-block
global-optimization? get [ work-list get [ visit-block ] slurp-deque ] when