diff --git a/js/src/jit/IonControlFlow.h b/js/src/jit/IonControlFlow.h
index 96c47d862dee..65cc984d60a5 100644
--- a/js/src/jit/IonControlFlow.h
+++ b/js/src/jit/IonControlFlow.h
@@ -53,11 +53,10 @@ class CFGBlock : public TempObject {
   jsbytecode* start;
   jsbytecode* stop;
   CFGControlInstruction* end;
-  bool inWorkList;
 
  public:
   explicit CFGBlock(jsbytecode* start)
-      : id_(-1), start(start), stop(nullptr), end(nullptr), inWorkList(false) {}
+      : id_(-1), start(start), stop(nullptr), end(nullptr) {}
 
   static CFGBlock* New(TempAllocator& alloc, jsbytecode* start) {
     return new (alloc) CFGBlock(start);
@@ -77,15 +76,6 @@ class CFGBlock : public TempObject {
     return end;
   }
   void setStopIns(CFGControlInstruction* stopIns) { end = stopIns; }
-  bool isInWorkList() const { return inWorkList; }
-  void setInWorklist() {
-    MOZ_ASSERT(!inWorkList);
-    inWorkList = true;
-  }
-  void clearInWorkList() {
-    MOZ_ASSERT(inWorkList);
-    inWorkList = false;
-  }
   size_t id() const { return id_; }
   void setId(size_t id) { id_ = id; }
 };
diff --git a/js/src/jit/MIRGraph.cpp b/js/src/jit/MIRGraph.cpp
index 3a7397a33a19..1747827b71de 100644
--- a/js/src/jit/MIRGraph.cpp
+++ b/js/src/jit/MIRGraph.cpp
@@ -116,16 +116,6 @@ void MIRGraph::insertBlockBefore(MBasicBlock* at, MBasicBlock* block) {
   numBlocks_++;
 }
 
-void MIRGraph::renumberBlocksAfter(MBasicBlock* at) {
-  MBasicBlockIterator iter = begin(at);
-  iter++;
-
-  uint32_t id = at->id();
-  for (; iter != end(); iter++) {
-    iter->setId(++id);
-  }
-}
-
 bool MIRGraph::removeSuccessorBlocks(MBasicBlock* start) {
   if (!start->hasLastIns()) {
     return true;
diff --git a/js/src/jit/MIRGraph.h b/js/src/jit/MIRGraph.h
index 58af4784818f..e755ede11d12 100644
--- a/js/src/jit/MIRGraph.h
+++ b/js/src/jit/MIRGraph.h
@@ -747,8 +747,6 @@ class MIRGraph {
   void insertBlockAfter(MBasicBlock* at, MBasicBlock* block);
   void insertBlockBefore(MBasicBlock* at, MBasicBlock* block);
 
-  void renumberBlocksAfter(MBasicBlock* at);
-
   void unmarkBlocks();
 
   void setReturnAccumulator(MIRGraphReturns* accum) {
@@ -799,12 +797,6 @@ class MIRGraph {
   uint32_t getNumInstructionIds() { return idGen_; }
   MResumePoint* entryResumePoint() { return entryBlock()->entryResumePoint(); }
 
-  void copyIds(const MIRGraph& other) {
-    idGen_ = other.idGen_;
-    blockIdGen_ = other.blockIdGen_;
-    numBlocks_ = other.numBlocks_;
-  }
-
   void setOsrBlock(MBasicBlock* osrBlock) {
     MOZ_ASSERT(!osrBlock_);
     osrBlock_ = osrBlock;
diff --git a/js/src/vm/NativeObject-inl.h b/js/src/vm/NativeObject-inl.h
index 023374b1deeb..dc1ec3712d7e 100644
--- a/js/src/vm/NativeObject-inl.h
+++ b/js/src/vm/NativeObject-inl.h
@@ -467,13 +467,6 @@ MOZ_ALWAYS_INLINE void NativeObject::setSlotWithType(JSContext* cx,
   AddTypePropertyId(cx, this, shape->propid(), value);
 }
 
-inline void NativeObject::updateShapeAfterMovingGC() {
-  Shape* shape = this->shape();
-  if (IsForwarded(shape)) {
-    shape_.unsafeSet(Forwarded(shape));
-  }
-}
-
 inline bool NativeObject::isInWholeCellBuffer() const {
   const gc::TenuredCell* cell = &asTenured();
   gc::ArenaCellSet* cells = cell->arena()->bufferedCells();
diff --git a/js/src/vm/NativeObject.h b/js/src/vm/NativeObject.h
index 6d0b5f18f1fd..429ee4076d0d 100644
--- a/js/src/vm/NativeObject.h
+++ b/js/src/vm/NativeObject.h
@@ -1484,7 +1484,6 @@ class NativeObject : public JSObject {
   /* Return the allocKind we would use if we were to tenure this object. */
   inline js::gc::AllocKind allocKindForTenure() const;
 
-  void updateShapeAfterMovingGC();
   void sweepDictionaryListPointer();
   void updateDictionaryListPointerAfterMinorGC(NativeObject* old);