diff --git a/.hgtags b/.hgtags
index e90cd1bccdadc98ed0402417802a0afe99bff25b..11162d27fa806969cdf1cba623b9f725a61adde6 100644
--- a/.hgtags
+++ b/.hgtags
@@ -1140,6 +1140,7 @@ d2ebd6530396b0afc700cd1a8eaf1f7a7f9fce8d jdk8u162-b36
 a17bab9405474602b18cd62e060a09b17d6413ac jdk8u171-b00
 ebfd57cc21e6b7f0c22b17c666b6b28c9340e207 jdk8u171-b01
 1acd7c1b80241def8fac90f70b0df16356adad47 jdk8u171-b02
+5587cde50bbc2aa031aefb47eaa36b041f5e7c4b jdk8u181-b00
 5587cde50bbc2aa031aefb47eaa36b041f5e7c4b jdk8u171-b03
 99ef466523302cfbd00496cf6575a00c8637b884 jdk8u171-b04
 08326a76b14888908523cf2bb1105de63b43544d jdk8u171-b05
@@ -1163,3 +1164,6 @@ a311a45523b19d59f77e76b0441a2085bb5355c8 jdk8u172-b07
 aafd1bb21e2636ba982d3eae162f5c635a1df03a jdk8u172-b09
 dcd3ace969fcde4eedaddba629647656289d4264 jdk8u172-b10
 083a9d6562100353708e4b73656282b21a78f714 jdk8u172-b11
+6e2be123a2e1c7671086c767e79ffe8ad5d4f9ca jdk8u181-b01
+1d0b6fcff115a57ca02081da84589630ba282789 jdk8u181-b02
+1127faef22f14d56cdd6c0c8bded598f492c2611 jdk8u181-b03
diff --git a/src/os/linux/vm/os_linux.hpp b/src/os/linux/vm/os_linux.hpp
index c56983cdd1a5bcf632b28edc92016dc942b7a577..d382c9840e09411f09e741754ad1c1e7a9384d13 100644
--- a/src/os/linux/vm/os_linux.hpp
+++ b/src/os/linux/vm/os_linux.hpp
@@ -285,8 +285,8 @@ private:
   static void set_numa_bitmask_isbitset(numa_bitmask_isbitset_func_t func) { _numa_bitmask_isbitset = func; }
   static void set_numa_distance(numa_distance_func_t func) { _numa_distance = func; }
   static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; }
-  static void set_numa_all_nodes_ptr(struct bitmask **ptr) { _numa_all_nodes_ptr = *ptr; }
-  static void set_numa_nodes_ptr(struct bitmask **ptr) { _numa_nodes_ptr = *ptr; }
+  static void set_numa_all_nodes_ptr(struct bitmask **ptr) { _numa_all_nodes_ptr = (ptr == NULL ? NULL : *ptr); }
+  static void set_numa_nodes_ptr(struct bitmask **ptr) { _numa_nodes_ptr = (ptr == NULL ? NULL : *ptr); }
   static int sched_getcpu_syscall(void);
 public:
   static int sched_getcpu()  { return _sched_getcpu != NULL ? _sched_getcpu() : -1; }
@@ -330,6 +330,18 @@ public:
   static bool isnode_in_existing_nodes(unsigned int n) {
     if (_numa_bitmask_isbitset != NULL && _numa_nodes_ptr != NULL) {
       return _numa_bitmask_isbitset(_numa_nodes_ptr, n);
+    } else if (_numa_bitmask_isbitset != NULL && _numa_all_nodes_ptr != NULL) {
+      // Not all libnuma API v2 implement numa_nodes_ptr, so it's not possible
+      // to trust the API version for checking its absence. On the other hand,
+      // numa_nodes_ptr found in libnuma 2.0.9 and above is the only way to get
+      // a complete view of all numa nodes in the system, hence numa_nodes_ptr
+      // is used to handle CPU and nodes on architectures (like PowerPC) where
+      // there can exist nodes with CPUs but no memory or vice-versa and the
+      // nodes may be non-contiguous. For most of the architectures, like
+      // x86_64, numa_node_ptr presents the same node set as found in
+      // numa_all_nodes_ptr so it's possible to use numa_all_nodes_ptr as a
+      // substitute.
+      return _numa_bitmask_isbitset(_numa_all_nodes_ptr, n);
     } else
       return 0;
   }
diff --git a/src/share/vm/code/codeBlob.cpp b/src/share/vm/code/codeBlob.cpp
index ee0d17de2ca1524617845b5f4a73b495d1ff2cb8..87ae60f81ec44ff834d272332e07b358d1d91292 100644
--- a/src/share/vm/code/codeBlob.cpp
+++ b/src/share/vm/code/codeBlob.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -289,6 +289,28 @@ AdapterBlob* AdapterBlob::create(CodeBuffer* cb) {
   return blob;
 }
 
+VtableBlob::VtableBlob(const char* name, int size) :
+  BufferBlob(name, size) {
+}
+
+VtableBlob* VtableBlob::create(const char* name, int buffer_size) {
+  ThreadInVMfromUnknown __tiv;  // get to VM state in case we block on CodeCache_lock
+
+  VtableBlob* blob = NULL;
+  unsigned int size = sizeof(VtableBlob);
+  // align the size to CodeEntryAlignment
+  size = align_code_offset(size);
+  size += round_to(buffer_size, oopSize);
+  assert(name != NULL, "must provide a name");
+  {
+    MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
+    blob = new (size) VtableBlob(name, size);
+  }
+  // Track memory usage statistic after releasing CodeCache_lock
+  MemoryService::track_code_cache_memory_usage();
+
+  return blob;
+}
 
 //----------------------------------------------------------------------------------------------------
 // Implementation of MethodHandlesAdapterBlob
diff --git a/src/share/vm/code/codeBlob.hpp b/src/share/vm/code/codeBlob.hpp
index db270f135cec5e77e8af2f5a2e1c9b5fe8fcb55d..4f83fac6a2601cc66d75104d2b5bafe01e7c4df1 100644
--- a/src/share/vm/code/codeBlob.hpp
+++ b/src/share/vm/code/codeBlob.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -101,6 +101,7 @@ class CodeBlob VALUE_OBJ_CLASS_SPEC {
   virtual bool is_exception_stub() const         { return false; }
   virtual bool is_safepoint_stub() const              { return false; }
   virtual bool is_adapter_blob() const                { return false; }
+  virtual bool is_vtable_blob() const                 { return false; }
   virtual bool is_method_handles_adapter_blob() const { return false; }
 
   virtual bool is_compiled_by_c2() const         { return false; }
@@ -202,6 +203,7 @@ class CodeBlob VALUE_OBJ_CLASS_SPEC {
 class BufferBlob: public CodeBlob {
   friend class VMStructs;
   friend class AdapterBlob;
+  friend class VtableBlob;
   friend class MethodHandlesAdapterBlob;
 
  private:
@@ -246,6 +248,18 @@ public:
   virtual bool is_adapter_blob() const { return true; }
 };
 
+//---------------------------------------------------------------------------------------------------
+class VtableBlob: public BufferBlob {
+private:
+  VtableBlob(const char*, int);
+
+public:
+  // Creation
+  static VtableBlob* create(const char* name, int buffer_size);
+
+  // Typing
+  virtual bool is_vtable_blob() const { return true; }
+};
 
 //----------------------------------------------------------------------------------------------------
 // MethodHandlesAdapterBlob: used to hold MethodHandles adapters
diff --git a/src/share/vm/code/compiledIC.cpp b/src/share/vm/code/compiledIC.cpp
index 783fe9dd467bd166b1afcf546be3692db7bda1e0..63821c0613067bb0f04c20c53b5753439ab985b3 100644
--- a/src/share/vm/code/compiledIC.cpp
+++ b/src/share/vm/code/compiledIC.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -232,7 +232,7 @@ bool CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecod
     assert(k->verify_itable_index(itable_index), "sanity check");
 #endif //ASSERT
     CompiledICHolder* holder = new CompiledICHolder(call_info->resolved_method()->method_holder(),
-                                                    call_info->resolved_klass()());
+                                                    call_info->resolved_klass()(), false);
     holder->claim();
     InlineCacheBuffer::create_transition_stub(this, holder, entry);
   } else {
@@ -270,7 +270,7 @@ bool CompiledIC::is_megamorphic() const {
   assert(!is_optimized(), "an optimized call cannot be megamorphic");
 
   // Cannot rely on cached_value. It is either an interface or a method.
-  return VtableStubs::is_entry_point(ic_destination());
+  return VtableStubs::entry_point(ic_destination()) != NULL;
 }
 
 bool CompiledIC::is_call_to_compiled() const {
@@ -534,9 +534,11 @@ bool CompiledIC::is_icholder_entry(address entry) {
     return true;
   }
   // itable stubs also use CompiledICHolder
-  if (VtableStubs::is_entry_point(entry) && VtableStubs::stub_containing(entry)->is_itable_stub()) {
-    return true;
+  if (cb != NULL && cb->is_vtable_blob()) {
+    VtableStub* s = VtableStubs::entry_point(entry);
+    return (s != NULL) && s->is_itable_stub();
   }
+
   return false;
 }
 
diff --git a/src/share/vm/code/vtableStubs.cpp b/src/share/vm/code/vtableStubs.cpp
index ac99da40e1cff85316369a816ceeec50dd04efc9..8424378d7eea416e5191aee5fdf7c4787335c3bf 100644
--- a/src/share/vm/code/vtableStubs.cpp
+++ b/src/share/vm/code/vtableStubs.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -60,7 +60,7 @@ void* VtableStub::operator new(size_t size, int code_size) throw() {
 
    // There is a dependency on the name of the blob in src/share/vm/prims/jvmtiCodeBlobEvents.cpp
    // If changing the name, update the other file accordingly.
-    BufferBlob* blob = BufferBlob::create("vtable chunks", bytes);
+    VtableBlob* blob = VtableBlob::create("vtable chunks", bytes);
     if (blob == NULL) {
       return NULL;
     }
@@ -167,17 +167,18 @@ void VtableStubs::enter(bool is_vtable_stub, int vtable_index, VtableStub* s) {
   _number_of_vtable_stubs++;
 }
 
-
-bool VtableStubs::is_entry_point(address pc) {
+VtableStub* VtableStubs::entry_point(address pc) {
   MutexLocker ml(VtableStubs_lock);
   VtableStub* stub = (VtableStub*)(pc - VtableStub::entry_offset());
   uint hash = VtableStubs::hash(stub->is_vtable_stub(), stub->index());
   VtableStub* s;
   for (s = _table[hash]; s != NULL && s != stub; s = s->next()) {}
-  return s == stub;
+  if (s == stub) {
+    return s;
+  }
+  return NULL;
 }
 
-
 bool VtableStubs::contains(address pc) {
   // simple solution for now - we may want to use
   // a faster way if this function is called often
diff --git a/src/share/vm/code/vtableStubs.hpp b/src/share/vm/code/vtableStubs.hpp
index b3d4f2d838ef0c0a239e4effd12f284e0d6fedc4..04f3e7e3cdebf88d0b406e0badcc44ea13220101 100644
--- a/src/share/vm/code/vtableStubs.hpp
+++ b/src/share/vm/code/vtableStubs.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -126,7 +126,7 @@ class VtableStubs : AllStatic {
  public:
   static address     find_vtable_stub(int vtable_index) { return find_stub(true,  vtable_index); }
   static address     find_itable_stub(int itable_index) { return find_stub(false, itable_index); }
-  static bool        is_entry_point(address pc);                     // is pc a vtable stub entry point?
+  static VtableStub* entry_point(address pc);                        // vtable stub entry point for a pc
   static bool        contains(address pc);                           // is pc within any stub?
   static VtableStub* stub_containing(address pc);                    // stub containing pc or NULL
   static int         number_of_vtable_stubs() { return _number_of_vtable_stubs; }
diff --git a/src/share/vm/oops/compiledICHolder.cpp b/src/share/vm/oops/compiledICHolder.cpp
index f5af2d4139e8be7b8f91bb2f3b97c5e2e7042f31..568f2fe25654aaef10ec13394af651b700086e7a 100644
--- a/src/share/vm/oops/compiledICHolder.cpp
+++ b/src/share/vm/oops/compiledICHolder.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -24,30 +24,12 @@
 
 #include "precompiled.hpp"
 #include "oops/compiledICHolder.hpp"
-#include "oops/klass.hpp"
-#include "oops/method.hpp"
 #include "oops/oop.inline2.hpp"
 
 volatile int CompiledICHolder::_live_count;
 volatile int CompiledICHolder::_live_not_claimed_count;
 
 
-bool CompiledICHolder::is_loader_alive(BoolObjectClosure* is_alive) {
-  if (_holder_metadata->is_method()) {
-    if (!((Method*)_holder_metadata)->method_holder()->is_loader_alive(is_alive)) {
-      return false;
-    }
-  } else if (_holder_metadata->is_klass()) {
-    if (!((Klass*)_holder_metadata)->is_loader_alive(is_alive)) {
-      return false;
-    }
-  }
-  if (!_holder_klass->is_loader_alive(is_alive)) {
-    return false;
-  }
-  return true;
-}
-
 // Printing
 
 void CompiledICHolder::print_on(outputStream* st) const {
diff --git a/src/share/vm/oops/compiledICHolder.hpp b/src/share/vm/oops/compiledICHolder.hpp
index 8e1f20e2277bdbbd339438e818810ee8d1f24ad5..63d3a87d0efdfd7978c6010a05613230f4809b3d 100644
--- a/src/share/vm/oops/compiledICHolder.hpp
+++ b/src/share/vm/oops/compiledICHolder.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,6 +26,8 @@
 #define SHARE_VM_OOPS_COMPILEDICHOLDEROOP_HPP
 
 #include "oops/oop.hpp"
+#include "oops/klass.hpp"
+#include "oops/method.hpp"
 
 // A CompiledICHolder* is a helper object for the inline cache implementation.
 // It holds:
@@ -48,11 +50,12 @@ class CompiledICHolder : public CHeapObj<mtCompiler> {
   Metadata* _holder_metadata;
   Klass*    _holder_klass;    // to avoid name conflict with oopDesc::_klass
   CompiledICHolder* _next;
+  bool _is_metadata_method;
 
  public:
   // Constructor
-  CompiledICHolder(Metadata* metadata, Klass* klass)
-      : _holder_metadata(metadata), _holder_klass(klass) {
+  CompiledICHolder(Metadata* metadata, Klass* klass, bool is_method = true)
+      : _holder_metadata(metadata), _holder_klass(klass), _is_metadata_method(is_method) {
 #ifdef ASSERT
     Atomic::inc(&_live_count);
     Atomic::inc(&_live_not_claimed_count);
@@ -82,7 +85,16 @@ class CompiledICHolder : public CHeapObj<mtCompiler> {
   CompiledICHolder* next()     { return _next; }
   void set_next(CompiledICHolder* n) { _next = n; }
 
-  bool is_loader_alive(BoolObjectClosure* is_alive);
+  inline bool is_loader_alive(BoolObjectClosure* is_alive) {
+    Klass* k = _is_metadata_method ? ((Method*)_holder_metadata)->method_holder() : (Klass*)_holder_metadata;
+    if (!k->is_loader_alive(is_alive)) {
+      return false;
+    }
+    if (!_holder_klass->is_loader_alive(is_alive)) {
+      return false;
+    }
+    return true;
+  }
 
   // Verify
   void verify_on(outputStream* st);
diff --git a/src/share/vm/opto/ifnode.cpp b/src/share/vm/opto/ifnode.cpp
index a5f0f3458f6bc890555213c66bb7bd2097fa7cb5..3101455e2b2236cc6675f505ef9c9dd2c6782e67 100644
--- a/src/share/vm/opto/ifnode.cpp
+++ b/src/share/vm/opto/ifnode.cpp
@@ -453,6 +453,9 @@ static Node* split_if(IfNode *iff, PhaseIterGVN *igvn) {
 // offset.  Return 2 if we had to negate the test.  Index is NULL if the check
 // is versus a constant.
 int IfNode::is_range_check(Node* &range, Node* &index, jint &offset) {
+  if (outcnt() != 2) {
+    return 0;
+  }
   Node* b = in(1);
   if (b == NULL || !b->is_Bool())  return 0;
   BoolNode* bn = b->as_Bool();