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compiler.cfg.ssa.live-ranges: clean up

db4
Slava Pestov 2010-05-14 16:44:03 -04:00
parent 2a137bed0e
commit 291543c300
1 changed files with 6 additions and 9 deletions
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15
basis/compiler/cfg/ssa/interference/live-ranges/live-ranges.factor
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@ -1,8 +1,9 @@
! Copyright (C) 2009 Slava Pestov.
! Copyright (C) 2009, 2010 Slava Pestov.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors assocs fry kernel namespaces sequences math
arrays compiler.cfg.def-use compiler.cfg.instructions
compiler.cfg.liveness.ssa compiler.cfg.rpo compiler.cfg.dominance ;
compiler.cfg.liveness.ssa compiler.cfg.rpo
compiler.cfg.dominance compiler.cfg ;
IN: compiler.cfg.ssa.interference.live-ranges
! Live ranges for interference testing
@ -12,18 +13,14 @@ IN: compiler.cfg.ssa.interference.live-ranges
SYMBOLS: local-def-indices local-kill-indices ;
: record-def ( n insn -- )
! We allow multiple defs of a vreg as long as they're
! all in the same basic block
defs-vreg dup [
local-def-indices get 2dup key?
[ 3drop ] [ set-at ] if
] [ 2drop ] if ;
defs-vreg dup [ local-def-indices get set-at ] [ 2drop ] if ;
: record-uses ( n insn -- )
! Record live intervals so that all but the first input interfere
! with the output. This lets us coalesce the output with the
! first input.
[ uses-vregs ] [ def-is-use-insn? ] bi over empty? [ 3drop ] [
dup uses-vregs dup empty? [ 3drop ] [
swap def-is-use-insn?
[ [ first local-kill-indices get set-at ] [ rest-slice ] 2bi ] unless
[ 1 + ] dip [ local-kill-indices get set-at ] with each
] if ;