From 7744498ad2b72074e3f6ee9cfbe31aeeade9f490 Mon Sep 17 00:00:00 2001
From: John Benediktsson <mrjbq7@gmail.com>
Date: Sat, 23 Mar 2013 18:13:17 -0700
Subject: [PATCH] compiler.cfg.ssa.construction.tdmsc: pass visited set on
 stack.

---
 .../cfg/ssa/construction/tdmsc/tdmsc.factor   | 24 +++++++++----------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/basis/compiler/cfg/ssa/construction/tdmsc/tdmsc.factor b/basis/compiler/cfg/ssa/construction/tdmsc/tdmsc.factor
index 188ef3ba58..1cae9c44d3 100644
--- a/basis/compiler/cfg/ssa/construction/tdmsc/tdmsc.factor
+++ b/basis/compiler/cfg/ssa/construction/tdmsc/tdmsc.factor
@@ -14,7 +14,7 @@ IN: compiler.cfg.ssa.construction.tdmsc
 
 <PRIVATE
 
-SYMBOLS: visited merge-sets levels again? ;
+SYMBOLS: merge-sets levels again? ;
 
 : init-merge-sets ( cfg -- )
     post-order dup length '[ _ <bit-set> ] H{ } map>assoc merge-sets set ;
@@ -52,22 +52,22 @@ SYMBOLS: visited merge-sets levels again? ;
 : consistent? ( snode lnode -- ? )
     [ merge-sets get at ] bi@ subset? ;
 
-: (process-edge) ( from to -- )
-    f walk [
-        2dup 2array visited get ?adjoin
-        [ 2drop ] [ consistent? [ again? on ] unless ] if
+: (process-edge) ( from to visited -- )
+    [ f walk ] dip '[
+        2dup 2array _ ?adjoin [ 2drop ] [
+            consistent? [ again? on ] unless
+        ] if
     ] each-incoming-j-edge ;
 
-: process-edge ( from to -- )
-    2dup 2array visited get ?adjoin
-    [ (process-edge) ] [ 2drop ] if ;
+: process-edge ( from to visited -- )
+    [ 2over 2array swap ?adjoin ] keep
+    '[ _ (process-edge) ] [ 2drop ] if ;
 
-: process-block ( bb -- )
-    [ process-edge ] each-incoming-j-edge ;
+: process-block ( bb visited -- )
+    '[ _ process-edge ] each-incoming-j-edge ;
 
 : compute-merge-set-step ( bfo -- )
-    HS{ } clone visited set
-    [ process-block ] each ;
+    HS{ } clone '[ _ process-block ] each ;
 
 : compute-merge-set-loop ( cfg -- )
     breadth-first-order