diff --git a/basis/compiler/cfg/ssa/liveness/liveness-tests.factor b/basis/compiler/cfg/ssa/liveness/liveness-tests.factor
index 137fa0371f..5493f252c1 100644
--- a/basis/compiler/cfg/ssa/liveness/liveness-tests.factor
+++ b/basis/compiler/cfg/ssa/liveness/liveness-tests.factor
@@ -39,7 +39,6 @@ cfg new 1 get >>entry 4 set
 [ ] [ 4 get precompute-liveness ] unit-test
 
 [ H{ } ] [ back-edge-targets get ] unit-test
-[ H{ } ] [ phi-outs get ] unit-test
 [ t ] [ 1 get R_q { 1 2 3 } [ get ] map unique = ] unit-test
 [ t ] [ 2 get R_q { 2 } [ get ] map unique = ] unit-test
 [ t ] [ 3 get R_q { 3 } [ get ] map unique = ] unit-test
@@ -107,7 +106,7 @@ cfg new 1 get >>entry 5 set
 [ f ] [ V int-regs 1 2 get live-in? ] unit-test
 [ f ] [ V int-regs 2 2 get live-in? ] unit-test
 
-[ t ] [ V int-regs 0 2 get live-out? ] unit-test
+[ f ] [ V int-regs 0 2 get live-out? ] unit-test
 [ f ] [ V int-regs 1 2 get live-out? ] unit-test
 [ f ] [ V int-regs 2 2 get live-out? ] unit-test
 
@@ -116,7 +115,7 @@ cfg new 1 get >>entry 5 set
 [ f ] [ V int-regs 2 3 get live-in? ] unit-test
 
 [ f ] [ V int-regs 0 3 get live-out? ] unit-test
-[ t ] [ V int-regs 1 3 get live-out? ] unit-test
+[ f ] [ V int-regs 1 3 get live-out? ] unit-test
 [ f ] [ V int-regs 2 3 get live-out? ] unit-test
 
 [ f ] [ V int-regs 0 4 get live-in? ] unit-test
@@ -200,8 +199,6 @@ cfg new 1 get >>entry 0 set
 [ f ] [ 10 get back-edge-target? ] unit-test
 [ f ] [ 11 get back-edge-target? ] unit-test
 
-[ f ] [ 1 11 [a,b] [ get phi-outs get at ] any? ] unit-test
-
 [ f ] [ V int-regs 0 1 get live-in? ] unit-test
 [ f ] [ V int-regs 1 1 get live-in? ] unit-test
 [ f ] [ V int-regs 2 1 get live-in? ] unit-test
diff --git a/basis/compiler/cfg/ssa/liveness/liveness.factor b/basis/compiler/cfg/ssa/liveness/liveness.factor
index f2a195eb24..625639cc73 100644
--- a/basis/compiler/cfg/ssa/liveness/liveness.factor
+++ b/basis/compiler/cfg/ssa/liveness/liveness.factor
@@ -21,10 +21,6 @@ SYMBOL: R_q-sets
 ! Targets of back edges
 SYMBOL: back-edge-targets
 
-! hashtable of nodes => sets of vregs, where the vregs are inputs
-! to phi nodes in a successor node
-SYMBOL: phi-outs
-
 : T_q ( q -- T_q )
     T_q-sets get at ;
 
@@ -34,9 +30,6 @@ SYMBOL: phi-outs
 : back-edge-target? ( block -- ? )
     back-edge-targets get key? ;
 
-: phi-out? ( vreg node -- ? )
-    phi-outs get at key? ;
-
 : next-R_q ( q -- R_q )
     [ ] [ successors>> ] [ number>> ] tri
     '[ number>> _ >= ] filter
@@ -52,27 +45,14 @@ SYMBOL: phi-outs
         [ back-edge-targets get conjoin ] [ drop ] if
     ] each ;
 
-: set-phi-out ( block vreg -- )
-    swap phi-outs get [ drop H{ } clone ] cache conjoin ;
-
-: set-phi-outs ( q -- )
-    instructions>> [
-        dup ##phi? [
-            inputs>> [ set-phi-out ] assoc-each
-        ] [ drop ] if
-    ] each ;
-
 : init-R_q ( -- )
     H{ } clone R_q-sets set
-    H{ } clone back-edge-targets set
-    H{ } clone phi-outs set ;
+    H{ } clone back-edge-targets set ;
 
 : compute-R_q ( cfg -- )
     init-R_q
     post-order [
-        [ set-R_q ]
-        [ set-back-edges ]
-        [ set-phi-outs ] tri
+        [ set-R_q ] [ set-back-edges ] bi
     ] each ;
 
 ! This algorithm for computing T_q uses equation (1)
@@ -150,7 +130,6 @@ PRIVATE>
     [let | def [ vreg def-of ] |
         {
             { [ node def eq? ] [ vreg uses-of def only? not ] }
-            { [ vreg node phi-out? ] [ t ] }
             { [ def node strictly-dominates? ] [ vreg node (live-out?) ] }
             [ f ]
         } cond