diff --git a/js/src/jstracer.cpp b/js/src/jstracer.cpp
index dfee6445986a..513f42f919cf 100644
--- a/js/src/jstracer.cpp
+++ b/js/src/jstracer.cpp
@@ -645,8 +645,8 @@ PCHash(jsbytecode* pc)
 Oracle::Oracle()
 {
     /* Grow the oracle bitsets to their (fixed) size here, once. */
-    _stackDontDemote.set(&gc, ORACLE_SIZE-1);
-    _globalDontDemote.set(&gc, ORACLE_SIZE-1);
+    _stackDontDemote.set(ORACLE_SIZE-1);
+    _globalDontDemote.set(ORACLE_SIZE-1);
     clear();
 }
 
@@ -654,7 +654,7 @@ Oracle::Oracle()
 JS_REQUIRES_STACK void
 Oracle::markGlobalSlotUndemotable(JSContext* cx, unsigned slot)
 {
-    _globalDontDemote.set(&gc, GlobalSlotHash(cx, slot));
+    _globalDontDemote.set(GlobalSlotHash(cx, slot));
 }
 
 /* Consult with the oracle whether we shouldn't demote a certain global variable. */
@@ -668,7 +668,7 @@ Oracle::isGlobalSlotUndemotable(JSContext* cx, unsigned slot) const
 JS_REQUIRES_STACK void
 Oracle::markStackSlotUndemotable(JSContext* cx, unsigned slot)
 {
-    _stackDontDemote.set(&gc, StackSlotHash(cx, slot));
+    _stackDontDemote.set(StackSlotHash(cx, slot));
 }
 
 /* Consult with the oracle whether we shouldn't demote a certain slot. */
@@ -682,7 +682,7 @@ Oracle::isStackSlotUndemotable(JSContext* cx, unsigned slot) const
 void
 Oracle::markInstructionUndemotable(jsbytecode* pc)
 {
-    _pcDontDemote.set(&gc, PCHash(pc));
+    _pcDontDemote.set(PCHash(pc));
 }
 
 /* Consult with the oracle whether we shouldn't demote a certain bytecode location. */
diff --git a/js/src/nanojit/Assembler.cpp b/js/src/nanojit/Assembler.cpp
index 16142903c8f6..51e95c6b12b2 100644
--- a/js/src/nanojit/Assembler.cpp
+++ b/js/src/nanojit/Assembler.cpp
@@ -724,7 +724,7 @@ namespace nanojit
         })
 
         // STOREFILTER for sp
-        StackFilter storefilter1(prev, gc, frag->lirbuf, frag->lirbuf->sp);
+        StackFilter storefilter1(prev, frag->lirbuf, frag->lirbuf->sp);
         prev = &storefilter1;
 
         verbose_only( if (_logc->lcbits & LC_AfterSF_SP) {
@@ -734,7 +734,7 @@ namespace nanojit
         })
 
         // STOREFILTER for rp
-        StackFilter storefilter2(prev, gc, frag->lirbuf, frag->lirbuf->rp);
+        StackFilter storefilter2(prev, frag->lirbuf, frag->lirbuf->rp);
         prev = &storefilter2;
 
         verbose_only( if (_logc->lcbits & LC_AfterSF_RP) {
diff --git a/js/src/nanojit/LIR.cpp b/js/src/nanojit/LIR.cpp
index 74d776d0b208..73d1eabaa08b 100644
--- a/js/src/nanojit/LIR.cpp
+++ b/js/src/nanojit/LIR.cpp
@@ -1017,8 +1017,8 @@ namespace nanojit
 
     using namespace avmplus;
 
-    StackFilter::StackFilter(LirFilter *in, GC *gc, LirBuffer *lirbuf, LInsp sp)
-        : LirFilter(in), gc(gc), lirbuf(lirbuf), sp(sp), top(0)
+    StackFilter::StackFilter(LirFilter *in, LirBuffer *lirbuf, LInsp sp)
+        : LirFilter(in), lirbuf(lirbuf), sp(sp), top(0)
     {}
 
     LInsp StackFilter::read()
@@ -1042,8 +1042,8 @@ namespace nanojit
                             if (stk.get(d) && stk.get(d-1)) {
                                 continue;
                             } else {
-                                stk.set(gc, d);
-                                stk.set(gc, d-1);
+                                stk.set(d);
+                                stk.set(d-1);
                             }
                         }
                         else {
@@ -1051,7 +1051,7 @@ namespace nanojit
                             if (stk.get(d))
                                 continue;
                             else
-                                stk.set(gc, d);
+                                stk.set(d);
                         }
                     }
                 }
@@ -1520,8 +1520,8 @@ namespace nanojit
         LiveTable live(gc);
         uint32_t exits = 0;
         LirReader br(frag->lastIns);
-        StackFilter sf(&br, gc, frag->lirbuf, frag->lirbuf->sp);
-        StackFilter r(&sf, gc, frag->lirbuf, frag->lirbuf->rp);
+        StackFilter sf(&br, frag->lirbuf, frag->lirbuf->sp);
+        StackFilter r(&sf, frag->lirbuf, frag->lirbuf->rp);
         int total = 0;
         if (frag->lirbuf->state)
             live.add(frag->lirbuf->state, r.pos());
diff --git a/js/src/nanojit/LIR.h b/js/src/nanojit/LIR.h
index b137e97c4720..41bbe14c7912 100644
--- a/js/src/nanojit/LIR.h
+++ b/js/src/nanojit/LIR.h
@@ -1199,14 +1199,13 @@ namespace nanojit
 
     class StackFilter: public LirFilter
     {
-        GC *gc;
         LirBuffer *lirbuf;
         LInsp sp;
         avmplus::BitSet stk;
         int top;
         int getTop(LInsp br);
     public:
-        StackFilter(LirFilter *in, GC *gc, LirBuffer *lirbuf, LInsp sp);
+        StackFilter(LirFilter *in, LirBuffer *lirbuf, LInsp sp);
         virtual ~StackFilter() {}
         LInsp read();
     };
diff --git a/js/src/nanojit/avmplus.h b/js/src/nanojit/avmplus.h
index 6a908d271c05..427092cb8fde 100644
--- a/js/src/nanojit/avmplus.h
+++ b/js/src/nanojit/avmplus.h
@@ -970,12 +970,12 @@ namespace avmplus {
                         bits.ar[i] = 0;
             }
 
-            void set(GC *gc, int bitNbr)
+            void set(int bitNbr)
             {
                 int index = bitNbr / kUnit;
                 int bit = bitNbr % kUnit;
                 if (index >= capacity)
-                    grow(gc, index+1);
+                    grow(index+1);
 
                 if (capacity > kDefaultCapacity)
                     bits.ptr[index] |= (1<<bit);
@@ -1013,7 +1013,7 @@ namespace avmplus {
 
         private:
             // Grow the array until at least newCapacity big
-            void grow(GC *gc, int newCapacity)
+            void grow(int newCapacity)
             {
                 // create vector that is 2x bigger than requested
                 newCapacity *= 2;