--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/opto/graphKit.cpp	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,3146 @@
+/*
+ * Copyright 2001-2007 Sun Microsystems, Inc.  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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_graphKit.cpp.incl"
+
+//----------------------------GraphKit-----------------------------------------
+// Main utility constructor.
+GraphKit::GraphKit(JVMState* jvms)
+  : Phase(Phase::Parser),
+    _env(C->env()),
+    _gvn(*C->initial_gvn())
+{
+  _exceptions = jvms->map()->next_exception();
+  if (_exceptions != NULL)  jvms->map()->set_next_exception(NULL);
+  set_jvms(jvms);
+}
+
+// Private constructor for parser.
+GraphKit::GraphKit()
+  : Phase(Phase::Parser),
+    _env(C->env()),
+    _gvn(*C->initial_gvn())
+{
+  _exceptions = NULL;
+  set_map(NULL);
+  debug_only(_sp = -99);
+  debug_only(set_bci(-99));
+}
+
+
+
+//---------------------------clean_stack---------------------------------------
+// Clear away rubbish from the stack area of the JVM state.
+// This destroys any arguments that may be waiting on the stack.
+void GraphKit::clean_stack(int from_sp) {
+  SafePointNode* map      = this->map();
+  JVMState*      jvms     = this->jvms();
+  int            stk_size = jvms->stk_size();
+  int            stkoff   = jvms->stkoff();
+  Node*          top      = this->top();
+  for (int i = from_sp; i < stk_size; i++) {
+    if (map->in(stkoff + i) != top) {
+      map->set_req(stkoff + i, top);
+    }
+  }
+}
+
+
+//--------------------------------sync_jvms-----------------------------------
+// Make sure our current jvms agrees with our parse state.
+JVMState* GraphKit::sync_jvms() const {
+  JVMState* jvms = this->jvms();
+  jvms->set_bci(bci());       // Record the new bci in the JVMState
+  jvms->set_sp(sp());         // Record the new sp in the JVMState
+  assert(jvms_in_sync(), "jvms is now in sync");
+  return jvms;
+}
+
+#ifdef ASSERT
+bool GraphKit::jvms_in_sync() const {
+  Parse* parse = is_Parse();
+  if (parse == NULL) {
+    if (bci() !=      jvms()->bci())          return false;
+    if (sp()  != (int)jvms()->sp())           return false;
+    return true;
+  }
+  if (jvms()->method() != parse->method())    return false;
+  if (jvms()->bci()    != parse->bci())       return false;
+  int jvms_sp = jvms()->sp();
+  if (jvms_sp          != parse->sp())        return false;
+  int jvms_depth = jvms()->depth();
+  if (jvms_depth       != parse->depth())     return false;
+  return true;
+}
+
+// Local helper checks for special internal merge points
+// used to accumulate and merge exception states.
+// They are marked by the region's in(0) edge being the map itself.
+// Such merge points must never "escape" into the parser at large,
+// until they have been handed to gvn.transform.
+static bool is_hidden_merge(Node* reg) {
+  if (reg == NULL)  return false;
+  if (reg->is_Phi()) {
+    reg = reg->in(0);
+    if (reg == NULL)  return false;
+  }
+  return reg->is_Region() && reg->in(0) != NULL && reg->in(0)->is_Root();
+}
+
+void GraphKit::verify_map() const {
+  if (map() == NULL)  return;  // null map is OK
+  assert(map()->req() <= jvms()->endoff(), "no extra garbage on map");
+  assert(!map()->has_exceptions(),    "call add_exception_states_from 1st");
+  assert(!is_hidden_merge(control()), "call use_exception_state, not set_map");
+}
+
+void GraphKit::verify_exception_state(SafePointNode* ex_map) {
+  assert(ex_map->next_exception() == NULL, "not already part of a chain");
+  assert(has_saved_ex_oop(ex_map), "every exception state has an ex_oop");
+}
+#endif
+
+//---------------------------stop_and_kill_map---------------------------------
+// Set _map to NULL, signalling a stop to further bytecode execution.
+// First smash the current map's control to a constant, to mark it dead.
+void GraphKit::stop_and_kill_map() {
+  SafePointNode* dead_map = stop();
+  if (dead_map != NULL) {
+    dead_map->disconnect_inputs(NULL); // Mark the map as killed.
+    assert(dead_map->is_killed(), "must be so marked");
+  }
+}
+
+
+//--------------------------------stopped--------------------------------------
+// Tell if _map is NULL, or control is top.
+bool GraphKit::stopped() {
+  if (map() == NULL)           return true;
+  else if (control() == top()) return true;
+  else                         return false;
+}
+
+
+//-----------------------------has_ex_handler----------------------------------
+// Tell if this method or any caller method has exception handlers.
+bool GraphKit::has_ex_handler() {
+  for (JVMState* jvmsp = jvms(); jvmsp != NULL; jvmsp = jvmsp->caller()) {
+    if (jvmsp->has_method() && jvmsp->method()->has_exception_handlers()) {
+      return true;
+    }
+  }
+  return false;
+}
+
+//------------------------------save_ex_oop------------------------------------
+// Save an exception without blowing stack contents or other JVM state.
+void GraphKit::set_saved_ex_oop(SafePointNode* ex_map, Node* ex_oop) {
+  assert(!has_saved_ex_oop(ex_map), "clear ex-oop before setting again");
+  ex_map->add_req(ex_oop);
+  debug_only(verify_exception_state(ex_map));
+}
+
+inline static Node* common_saved_ex_oop(SafePointNode* ex_map, bool clear_it) {
+  assert(GraphKit::has_saved_ex_oop(ex_map), "ex_oop must be there");
+  Node* ex_oop = ex_map->in(ex_map->req()-1);
+  if (clear_it)  ex_map->del_req(ex_map->req()-1);
+  return ex_oop;
+}
+
+//-----------------------------saved_ex_oop------------------------------------
+// Recover a saved exception from its map.
+Node* GraphKit::saved_ex_oop(SafePointNode* ex_map) {
+  return common_saved_ex_oop(ex_map, false);
+}
+
+//--------------------------clear_saved_ex_oop---------------------------------
+// Erase a previously saved exception from its map.
+Node* GraphKit::clear_saved_ex_oop(SafePointNode* ex_map) {
+  return common_saved_ex_oop(ex_map, true);
+}
+
+#ifdef ASSERT
+//---------------------------has_saved_ex_oop----------------------------------
+// Erase a previously saved exception from its map.
+bool GraphKit::has_saved_ex_oop(SafePointNode* ex_map) {
+  return ex_map->req() == ex_map->jvms()->endoff()+1;
+}
+#endif
+
+//-------------------------make_exception_state--------------------------------
+// Turn the current JVM state into an exception state, appending the ex_oop.
+SafePointNode* GraphKit::make_exception_state(Node* ex_oop) {
+  sync_jvms();
+  SafePointNode* ex_map = stop();  // do not manipulate this map any more
+  set_saved_ex_oop(ex_map, ex_oop);
+  return ex_map;
+}
+
+
+//--------------------------add_exception_state--------------------------------
+// Add an exception to my list of exceptions.
+void GraphKit::add_exception_state(SafePointNode* ex_map) {
+  if (ex_map == NULL || ex_map->control() == top()) {
+    return;
+  }
+#ifdef ASSERT
+  verify_exception_state(ex_map);
+  if (has_exceptions()) {
+    assert(ex_map->jvms()->same_calls_as(_exceptions->jvms()), "all collected exceptions must come from the same place");
+  }
+#endif
+
+  // If there is already an exception of exactly this type, merge with it.
+  // In particular, null-checks and other low-level exceptions common up here.
+  Node*       ex_oop  = saved_ex_oop(ex_map);
+  const Type* ex_type = _gvn.type(ex_oop);
+  if (ex_oop == top()) {
+    // No action needed.
+    return;
+  }
+  assert(ex_type->isa_instptr(), "exception must be an instance");
+  for (SafePointNode* e2 = _exceptions; e2 != NULL; e2 = e2->next_exception()) {
+    const Type* ex_type2 = _gvn.type(saved_ex_oop(e2));
+    // We check sp also because call bytecodes can generate exceptions
+    // both before and after arguments are popped!
+    if (ex_type2 == ex_type
+        && e2->_jvms->sp() == ex_map->_jvms->sp()) {
+      combine_exception_states(ex_map, e2);
+      return;
+    }
+  }
+
+  // No pre-existing exception of the same type.  Chain it on the list.
+  push_exception_state(ex_map);
+}
+
+//-----------------------add_exception_states_from-----------------------------
+void GraphKit::add_exception_states_from(JVMState* jvms) {
+  SafePointNode* ex_map = jvms->map()->next_exception();
+  if (ex_map != NULL) {
+    jvms->map()->set_next_exception(NULL);
+    for (SafePointNode* next_map; ex_map != NULL; ex_map = next_map) {
+      next_map = ex_map->next_exception();
+      ex_map->set_next_exception(NULL);
+      add_exception_state(ex_map);
+    }
+  }
+}
+
+//-----------------------transfer_exceptions_into_jvms-------------------------
+JVMState* GraphKit::transfer_exceptions_into_jvms() {
+  if (map() == NULL) {
+    // We need a JVMS to carry the exceptions, but the map has gone away.
+    // Create a scratch JVMS, cloned from any of the exception states...
+    if (has_exceptions()) {
+      _map = _exceptions;
+      _map = clone_map();
+      _map->set_next_exception(NULL);
+      clear_saved_ex_oop(_map);
+      debug_only(verify_map());
+    } else {
+      // ...or created from scratch
+      JVMState* jvms = new (C) JVMState(_method, NULL);
+      jvms->set_bci(_bci);
+      jvms->set_sp(_sp);
+      jvms->set_map(new (C, TypeFunc::Parms) SafePointNode(TypeFunc::Parms, jvms));
+      set_jvms(jvms);
+      for (uint i = 0; i < map()->req(); i++)  map()->init_req(i, top());
+      set_all_memory(top());
+      while (map()->req() < jvms->endoff())  map()->add_req(top());
+    }
+    // (This is a kludge, in case you didn't notice.)
+    set_control(top());
+  }
+  JVMState* jvms = sync_jvms();
+  assert(!jvms->map()->has_exceptions(), "no exceptions on this map yet");
+  jvms->map()->set_next_exception(_exceptions);
+  _exceptions = NULL;   // done with this set of exceptions
+  return jvms;
+}
+
+static inline void add_n_reqs(Node* dstphi, Node* srcphi) {
+  assert(is_hidden_merge(dstphi), "must be a special merge node");
+  assert(is_hidden_merge(srcphi), "must be a special merge node");
+  uint limit = srcphi->req();
+  for (uint i = PhiNode::Input; i < limit; i++) {
+    dstphi->add_req(srcphi->in(i));
+  }
+}
+static inline void add_one_req(Node* dstphi, Node* src) {
+  assert(is_hidden_merge(dstphi), "must be a special merge node");
+  assert(!is_hidden_merge(src), "must not be a special merge node");
+  dstphi->add_req(src);
+}
+
+//-----------------------combine_exception_states------------------------------
+// This helper function combines exception states by building phis on a
+// specially marked state-merging region.  These regions and phis are
+// untransformed, and can build up gradually.  The region is marked by
+// having a control input of its exception map, rather than NULL.  Such
+// regions do not appear except in this function, and in use_exception_state.
+void GraphKit::combine_exception_states(SafePointNode* ex_map, SafePointNode* phi_map) {
+  if (failing())  return;  // dying anyway...
+  JVMState* ex_jvms = ex_map->_jvms;
+  assert(ex_jvms->same_calls_as(phi_map->_jvms), "consistent call chains");
+  assert(ex_jvms->stkoff() == phi_map->_jvms->stkoff(), "matching locals");
+  assert(ex_jvms->sp() == phi_map->_jvms->sp(), "matching stack sizes");
+  assert(ex_jvms->monoff() == phi_map->_jvms->monoff(), "matching JVMS");
+  assert(ex_map->req() == phi_map->req(), "matching maps");
+  uint tos = ex_jvms->stkoff() + ex_jvms->sp();
+  Node*         hidden_merge_mark = root();
+  Node*         region  = phi_map->control();
+  MergeMemNode* phi_mem = phi_map->merged_memory();
+  MergeMemNode* ex_mem  = ex_map->merged_memory();
+  if (region->in(0) != hidden_merge_mark) {
+    // The control input is not (yet) a specially-marked region in phi_map.
+    // Make it so, and build some phis.
+    region = new (C, 2) RegionNode(2);
+    _gvn.set_type(region, Type::CONTROL);
+    region->set_req(0, hidden_merge_mark);  // marks an internal ex-state
+    region->init_req(1, phi_map->control());
+    phi_map->set_control(region);
+    Node* io_phi = PhiNode::make(region, phi_map->i_o(), Type::ABIO);
+    record_for_igvn(io_phi);
+    _gvn.set_type(io_phi, Type::ABIO);
+    phi_map->set_i_o(io_phi);
+    for (MergeMemStream mms(phi_mem); mms.next_non_empty(); ) {
+      Node* m = mms.memory();
+      Node* m_phi = PhiNode::make(region, m, Type::MEMORY, mms.adr_type(C));
+      record_for_igvn(m_phi);
+      _gvn.set_type(m_phi, Type::MEMORY);
+      mms.set_memory(m_phi);
+    }
+  }
+
+  // Either or both of phi_map and ex_map might already be converted into phis.
+  Node* ex_control = ex_map->control();
+  // if there is special marking on ex_map also, we add multiple edges from src
+  bool add_multiple = (ex_control->in(0) == hidden_merge_mark);
+  // how wide was the destination phi_map, originally?
+  uint orig_width = region->req();
+
+  if (add_multiple) {
+    add_n_reqs(region, ex_control);
+    add_n_reqs(phi_map->i_o(), ex_map->i_o());
+  } else {
+    // ex_map has no merges, so we just add single edges everywhere
+    add_one_req(region, ex_control);
+    add_one_req(phi_map->i_o(), ex_map->i_o());
+  }
+  for (MergeMemStream mms(phi_mem, ex_mem); mms.next_non_empty2(); ) {
+    if (mms.is_empty()) {
+      // get a copy of the base memory, and patch some inputs into it
+      const TypePtr* adr_type = mms.adr_type(C);
+      Node* phi = mms.force_memory()->as_Phi()->slice_memory(adr_type);
+      assert(phi->as_Phi()->region() == mms.base_memory()->in(0), "");
+      mms.set_memory(phi);
+      // Prepare to append interesting stuff onto the newly sliced phi:
+      while (phi->req() > orig_width)  phi->del_req(phi->req()-1);
+    }
+    // Append stuff from ex_map:
+    if (add_multiple) {
+      add_n_reqs(mms.memory(), mms.memory2());
+    } else {
+      add_one_req(mms.memory(), mms.memory2());
+    }
+  }
+  uint limit = ex_map->req();
+  for (uint i = TypeFunc::Parms; i < limit; i++) {
+    // Skip everything in the JVMS after tos.  (The ex_oop follows.)
+    if (i == tos)  i = ex_jvms->monoff();
+    Node* src = ex_map->in(i);
+    Node* dst = phi_map->in(i);
+    if (src != dst) {
+      PhiNode* phi;
+      if (dst->in(0) != region) {
+        dst = phi = PhiNode::make(region, dst, _gvn.type(dst));
+        record_for_igvn(phi);
+        _gvn.set_type(phi, phi->type());
+        phi_map->set_req(i, dst);
+        // Prepare to append interesting stuff onto the new phi:
+        while (dst->req() > orig_width)  dst->del_req(dst->req()-1);
+      } else {
+        assert(dst->is_Phi(), "nobody else uses a hidden region");
+        phi = (PhiNode*)dst;
+      }
+      if (add_multiple && src->in(0) == ex_control) {
+        // Both are phis.
+        add_n_reqs(dst, src);
+      } else {
+        while (dst->req() < region->req())  add_one_req(dst, src);
+      }
+      const Type* srctype = _gvn.type(src);
+      if (phi->type() != srctype) {
+        const Type* dsttype = phi->type()->meet(srctype);
+        if (phi->type() != dsttype) {
+          phi->set_type(dsttype);
+          _gvn.set_type(phi, dsttype);
+        }
+      }
+    }
+  }
+}
+
+//--------------------------use_exception_state--------------------------------
+Node* GraphKit::use_exception_state(SafePointNode* phi_map) {
+  if (failing()) { stop(); return top(); }
+  Node* region = phi_map->control();
+  Node* hidden_merge_mark = root();
+  assert(phi_map->jvms()->map() == phi_map, "sanity: 1-1 relation");
+  Node* ex_oop = clear_saved_ex_oop(phi_map);
+  if (region->in(0) == hidden_merge_mark) {
+    // Special marking for internal ex-states.  Process the phis now.
+    region->set_req(0, region);  // now it's an ordinary region
+    set_jvms(phi_map->jvms());   // ...so now we can use it as a map
+    // Note: Setting the jvms also sets the bci and sp.
+    set_control(_gvn.transform(region));
+    uint tos = jvms()->stkoff() + sp();
+    for (uint i = 1; i < tos; i++) {
+      Node* x = phi_map->in(i);
+      if (x->in(0) == region) {
+        assert(x->is_Phi(), "expected a special phi");
+        phi_map->set_req(i, _gvn.transform(x));
+      }
+    }
+    for (MergeMemStream mms(merged_memory()); mms.next_non_empty(); ) {
+      Node* x = mms.memory();
+      if (x->in(0) == region) {
+        assert(x->is_Phi(), "nobody else uses a hidden region");
+        mms.set_memory(_gvn.transform(x));
+      }
+    }
+    if (ex_oop->in(0) == region) {
+      assert(ex_oop->is_Phi(), "expected a special phi");
+      ex_oop = _gvn.transform(ex_oop);
+    }
+  } else {
+    set_jvms(phi_map->jvms());
+  }
+
+  assert(!is_hidden_merge(phi_map->control()), "hidden ex. states cleared");
+  assert(!is_hidden_merge(phi_map->i_o()), "hidden ex. states cleared");
+  return ex_oop;
+}
+
+//---------------------------------java_bc-------------------------------------
+Bytecodes::Code GraphKit::java_bc() const {
+  ciMethod* method = this->method();
+  int       bci    = this->bci();
+  if (method != NULL && bci != InvocationEntryBci)
+    return method->java_code_at_bci(bci);
+  else
+    return Bytecodes::_illegal;
+}
+
+//------------------------------builtin_throw----------------------------------
+void GraphKit::builtin_throw(Deoptimization::DeoptReason reason, Node* arg) {
+  bool must_throw = true;
+
+  if (JvmtiExport::can_post_exceptions()) {
+    // Do not try anything fancy if we're notifying the VM on every throw.
+    // Cf. case Bytecodes::_athrow in parse2.cpp.
+    uncommon_trap(reason, Deoptimization::Action_none,
+                  (ciKlass*)NULL, (char*)NULL, must_throw);
+    return;
+  }
+
+  // If this particular condition has not yet happened at this
+  // bytecode, then use the uncommon trap mechanism, and allow for
+  // a future recompilation if several traps occur here.
+  // If the throw is hot, try to use a more complicated inline mechanism
+  // which keeps execution inside the compiled code.
+  bool treat_throw_as_hot = false;
+  ciMethodData* md = method()->method_data();
+
+  if (ProfileTraps) {
+    if (too_many_traps(reason)) {
+      treat_throw_as_hot = true;
+    }
+    // (If there is no MDO at all, assume it is early in
+    // execution, and that any deopts are part of the
+    // startup transient, and don't need to be remembered.)
+
+    // Also, if there is a local exception handler, treat all throws
+    // as hot if there has been at least one in this method.
+    if (C->trap_count(reason) != 0
+        && method()->method_data()->trap_count(reason) != 0
+        && has_ex_handler()) {
+        treat_throw_as_hot = true;
+    }
+  }
+
+  // If this throw happens frequently, an uncommon trap might cause
+  // a performance pothole.  If there is a local exception handler,
+  // and if this particular bytecode appears to be deoptimizing often,
+  // let us handle the throw inline, with a preconstructed instance.
+  // Note:   If the deopt count has blown up, the uncommon trap
+  // runtime is going to flush this nmethod, not matter what.
+  if (treat_throw_as_hot
+      && (!StackTraceInThrowable || OmitStackTraceInFastThrow)) {
+    // If the throw is local, we use a pre-existing instance and
+    // punt on the backtrace.  This would lead to a missing backtrace
+    // (a repeat of 4292742) if the backtrace object is ever asked
+    // for its backtrace.
+    // Fixing this remaining case of 4292742 requires some flavor of
+    // escape analysis.  Leave that for the future.
+    ciInstance* ex_obj = NULL;
+    switch (reason) {
+    case Deoptimization::Reason_null_check:
+      ex_obj = env()->NullPointerException_instance();
+      break;
+    case Deoptimization::Reason_div0_check:
+      ex_obj = env()->ArithmeticException_instance();
+      break;
+    case Deoptimization::Reason_range_check:
+      ex_obj = env()->ArrayIndexOutOfBoundsException_instance();
+      break;
+    case Deoptimization::Reason_class_check:
+      if (java_bc() == Bytecodes::_aastore) {
+        ex_obj = env()->ArrayStoreException_instance();
+      } else {
+        ex_obj = env()->ClassCastException_instance();
+      }
+      break;
+    }
+    if (failing()) { stop(); return; }  // exception allocation might fail
+    if (ex_obj != NULL) {
+      // Cheat with a preallocated exception object.
+      if (C->log() != NULL)
+        C->log()->elem("hot_throw preallocated='1' reason='%s'",
+                       Deoptimization::trap_reason_name(reason));
+      const TypeInstPtr* ex_con  = TypeInstPtr::make(ex_obj);
+      Node*              ex_node = _gvn.transform(new (C, 1) ConPNode(ex_con));
+
+      // Clear the detail message of the preallocated exception object.
+      // Weblogic sometimes mutates the detail message of exceptions
+      // using reflection.
+      int offset = java_lang_Throwable::get_detailMessage_offset();
+      const TypePtr* adr_typ = ex_con->add_offset(offset);
+
+      Node *adr = basic_plus_adr(ex_node, ex_node, offset);
+      Node *store = store_oop_to_object(control(), ex_node, adr, adr_typ, null(), ex_con, T_OBJECT);
+
+      add_exception_state(make_exception_state(ex_node));
+      return;
+    }
+  }
+
+  // %%% Maybe add entry to OptoRuntime which directly throws the exc.?
+  // It won't be much cheaper than bailing to the interp., since we'll
+  // have to pass up all the debug-info, and the runtime will have to
+  // create the stack trace.
+
+  // Usual case:  Bail to interpreter.
+  // Reserve the right to recompile if we haven't seen anything yet.
+
+  Deoptimization::DeoptAction action = Deoptimization::Action_maybe_recompile;
+  if (treat_throw_as_hot
+      && (method()->method_data()->trap_recompiled_at(bci())
+          || C->too_many_traps(reason))) {
+    // We cannot afford to take more traps here.  Suffer in the interpreter.
+    if (C->log() != NULL)
+      C->log()->elem("hot_throw preallocated='0' reason='%s' mcount='%d'",
+                     Deoptimization::trap_reason_name(reason),
+                     C->trap_count(reason));
+    action = Deoptimization::Action_none;
+  }
+
+  // "must_throw" prunes the JVM state to include only the stack, if there
+  // are no local exception handlers.  This should cut down on register
+  // allocation time and code size, by drastically reducing the number
+  // of in-edges on the call to the uncommon trap.
+
+  uncommon_trap(reason, action, (ciKlass*)NULL, (char*)NULL, must_throw);
+}
+
+
+//----------------------------PreserveJVMState---------------------------------
+PreserveJVMState::PreserveJVMState(GraphKit* kit, bool clone_map) {
+  debug_only(kit->verify_map());
+  _kit    = kit;
+  _map    = kit->map();   // preserve the map
+  _sp     = kit->sp();
+  kit->set_map(clone_map ? kit->clone_map() : NULL);
+#ifdef ASSERT
+  _bci    = kit->bci();
+  Parse* parser = kit->is_Parse();
+  int block = (parser == NULL || parser->block() == NULL) ? -1 : parser->block()->pre_order();
+  _block  = block;
+#endif
+}
+PreserveJVMState::~PreserveJVMState() {
+  GraphKit* kit = _kit;
+#ifdef ASSERT
+  assert(kit->bci() == _bci, "bci must not shift");
+  Parse* parser = kit->is_Parse();
+  int block = (parser == NULL || parser->block() == NULL) ? -1 : parser->block()->pre_order();
+  assert(block == _block,    "block must not shift");
+#endif
+  kit->set_map(_map);
+  kit->set_sp(_sp);
+}
+
+
+//-----------------------------BuildCutout-------------------------------------
+BuildCutout::BuildCutout(GraphKit* kit, Node* p, float prob, float cnt)
+  : PreserveJVMState(kit)
+{
+  assert(p->is_Con() || p->is_Bool(), "test must be a bool");
+  SafePointNode* outer_map = _map;   // preserved map is caller's
+  SafePointNode* inner_map = kit->map();
+  IfNode* iff = kit->create_and_map_if(outer_map->control(), p, prob, cnt);
+  outer_map->set_control(kit->gvn().transform( new (kit->C, 1) IfTrueNode(iff) ));
+  inner_map->set_control(kit->gvn().transform( new (kit->C, 1) IfFalseNode(iff) ));
+}
+BuildCutout::~BuildCutout() {
+  GraphKit* kit = _kit;
+  assert(kit->stopped(), "cutout code must stop, throw, return, etc.");
+}
+
+
+//------------------------------clone_map--------------------------------------
+// Implementation of PreserveJVMState
+//
+// Only clone_map(...) here. If this function is only used in the
+// PreserveJVMState class we may want to get rid of this extra
+// function eventually and do it all there.
+
+SafePointNode* GraphKit::clone_map() {
+  if (map() == NULL)  return NULL;
+
+  // Clone the memory edge first
+  Node* mem = MergeMemNode::make(C, map()->memory());
+  gvn().set_type_bottom(mem);
+
+  SafePointNode *clonemap = (SafePointNode*)map()->clone();
+  JVMState* jvms = this->jvms();
+  JVMState* clonejvms = jvms->clone_shallow(C);
+  clonemap->set_memory(mem);
+  clonemap->set_jvms(clonejvms);
+  clonejvms->set_map(clonemap);
+  record_for_igvn(clonemap);
+  gvn().set_type_bottom(clonemap);
+  return clonemap;
+}
+
+
+//-----------------------------set_map_clone-----------------------------------
+void GraphKit::set_map_clone(SafePointNode* m) {
+  _map = m;
+  _map = clone_map();
+  _map->set_next_exception(NULL);
+  debug_only(verify_map());
+}
+
+
+//----------------------------kill_dead_locals---------------------------------
+// Detect any locals which are known to be dead, and force them to top.
+void GraphKit::kill_dead_locals() {
+  // Consult the liveness information for the locals.  If any
+  // of them are unused, then they can be replaced by top().  This
+  // should help register allocation time and cut down on the size
+  // of the deoptimization information.
+
+  // This call is made from many of the bytecode handling
+  // subroutines called from the Big Switch in do_one_bytecode.
+  // Every bytecode which might include a slow path is responsible
+  // for killing its dead locals.  The more consistent we
+  // are about killing deads, the fewer useless phis will be
+  // constructed for them at various merge points.
+
+  // bci can be -1 (InvocationEntryBci).  We return the entry
+  // liveness for the method.
+
+  if (method() == NULL || method()->code_size() == 0) {
+    // We are building a graph for a call to a native method.
+    // All locals are live.
+    return;
+  }
+
+  ResourceMark rm;
+
+  // Consult the liveness information for the locals.  If any
+  // of them are unused, then they can be replaced by top().  This
+  // should help register allocation time and cut down on the size
+  // of the deoptimization information.
+  MethodLivenessResult live_locals = method()->liveness_at_bci(bci());
+
+  int len = (int)live_locals.size();
+  assert(len <= jvms()->loc_size(), "too many live locals");
+  for (int local = 0; local < len; local++) {
+    if (!live_locals.at(local)) {
+      set_local(local, top());
+    }
+  }
+}
+
+#ifdef ASSERT
+//-------------------------dead_locals_are_killed------------------------------
+// Return true if all dead locals are set to top in the map.
+// Used to assert "clean" debug info at various points.
+bool GraphKit::dead_locals_are_killed() {
+  if (method() == NULL || method()->code_size() == 0) {
+    // No locals need to be dead, so all is as it should be.
+    return true;
+  }
+
+  // Make sure somebody called kill_dead_locals upstream.
+  ResourceMark rm;
+  for (JVMState* jvms = this->jvms(); jvms != NULL; jvms = jvms->caller()) {
+    if (jvms->loc_size() == 0)  continue;  // no locals to consult
+    SafePointNode* map = jvms->map();
+    ciMethod* method = jvms->method();
+    int       bci    = jvms->bci();
+    if (jvms == this->jvms()) {
+      bci = this->bci();  // it might not yet be synched
+    }
+    MethodLivenessResult live_locals = method->liveness_at_bci(bci);
+    int len = (int)live_locals.size();
+    if (!live_locals.is_valid() || len == 0)
+      // This method is trivial, or is poisoned by a breakpoint.
+      return true;
+    assert(len == jvms->loc_size(), "live map consistent with locals map");
+    for (int local = 0; local < len; local++) {
+      if (!live_locals.at(local) && map->local(jvms, local) != top()) {
+        if (PrintMiscellaneous && (Verbose || WizardMode)) {
+          tty->print_cr("Zombie local %d: ", local);
+          jvms->dump();
+        }
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+#endif //ASSERT
+
+// Helper function for adding JVMState and debug information to node
+void GraphKit::add_safepoint_edges(SafePointNode* call, bool must_throw) {
+  // Add the safepoint edges to the call (or other safepoint).
+
+  // Make sure dead locals are set to top.  This
+  // should help register allocation time and cut down on the size
+  // of the deoptimization information.
+  assert(dead_locals_are_killed(), "garbage in debug info before safepoint");
+
+  // Walk the inline list to fill in the correct set of JVMState's
+  // Also fill in the associated edges for each JVMState.
+
+  JVMState* youngest_jvms = sync_jvms();
+
+  // Do we need debug info here?  If it is a SafePoint and this method
+  // cannot de-opt, then we do NOT need any debug info.
+  bool full_info = (C->deopt_happens() || call->Opcode() != Op_SafePoint);
+
+  // If we are guaranteed to throw, we can prune everything but the
+  // input to the current bytecode.
+  bool can_prune_locals = false;
+  uint stack_slots_not_pruned = 0;
+  int inputs = 0, depth = 0;
+  if (must_throw) {
+    assert(method() == youngest_jvms->method(), "sanity");
+    if (compute_stack_effects(inputs, depth)) {
+      can_prune_locals = true;
+      stack_slots_not_pruned = inputs;
+    }
+  }
+
+  if (JvmtiExport::can_examine_or_deopt_anywhere()) {
+    // At any safepoint, this method can get breakpointed, which would
+    // then require an immediate deoptimization.
+    full_info = true;
+    can_prune_locals = false;  // do not prune locals
+    stack_slots_not_pruned = 0;
+  }
+
+  // do not scribble on the input jvms
+  JVMState* out_jvms = youngest_jvms->clone_deep(C);
+  call->set_jvms(out_jvms); // Start jvms list for call node
+
+  // Presize the call:
+  debug_only(uint non_debug_edges = call->req());
+  call->add_req_batch(top(), youngest_jvms->debug_depth());
+  assert(call->req() == non_debug_edges + youngest_jvms->debug_depth(), "");
+
+  // Set up edges so that the call looks like this:
+  //  Call [state:] ctl io mem fptr retadr
+  //       [parms:] parm0 ... parmN
+  //       [root:]  loc0 ... locN stk0 ... stkSP mon0 obj0 ... monN objN
+  //    [...mid:]   loc0 ... locN stk0 ... stkSP mon0 obj0 ... monN objN [...]
+  //       [young:] loc0 ... locN stk0 ... stkSP mon0 obj0 ... monN objN
+  // Note that caller debug info precedes callee debug info.
+
+  // Fill pointer walks backwards from "young:" to "root:" in the diagram above:
+  uint debug_ptr = call->req();
+
+  // Loop over the map input edges associated with jvms, add them
+  // to the call node, & reset all offsets to match call node array.
+  for (JVMState* in_jvms = youngest_jvms; in_jvms != NULL; ) {
+    uint debug_end   = debug_ptr;
+    uint debug_start = debug_ptr - in_jvms->debug_size();
+    debug_ptr = debug_start;  // back up the ptr
+
+    uint p = debug_start;  // walks forward in [debug_start, debug_end)
+    uint j, k, l;
+    SafePointNode* in_map = in_jvms->map();
+    out_jvms->set_map(call);
+
+    if (can_prune_locals) {
+      assert(in_jvms->method() == out_jvms->method(), "sanity");
+      // If the current throw can reach an exception handler in this JVMS,
+      // then we must keep everything live that can reach that handler.
+      // As a quick and dirty approximation, we look for any handlers at all.
+      if (in_jvms->method()->has_exception_handlers()) {
+        can_prune_locals = false;
+      }
+    }
+
+    // Add the Locals
+    k = in_jvms->locoff();
+    l = in_jvms->loc_size();
+    out_jvms->set_locoff(p);
+    if (full_info && !can_prune_locals) {
+      for (j = 0; j < l; j++)
+        call->set_req(p++, in_map->in(k+j));
+    } else {
+      p += l;  // already set to top above by add_req_batch
+    }
+
+    // Add the Expression Stack
+    k = in_jvms->stkoff();
+    l = in_jvms->sp();
+    out_jvms->set_stkoff(p);
+    if (full_info && !can_prune_locals) {
+      for (j = 0; j < l; j++)
+        call->set_req(p++, in_map->in(k+j));
+    } else if (can_prune_locals && stack_slots_not_pruned != 0) {
+      // Divide stack into {S0,...,S1}, where S0 is set to top.
+      uint s1 = stack_slots_not_pruned;
+      stack_slots_not_pruned = 0;  // for next iteration
+      if (s1 > l)  s1 = l;
+      uint s0 = l - s1;
+      p += s0;  // skip the tops preinstalled by add_req_batch
+      for (j = s0; j < l; j++)
+        call->set_req(p++, in_map->in(k+j));
+    } else {
+      p += l;  // already set to top above by add_req_batch
+    }
+
+    // Add the Monitors
+    k = in_jvms->monoff();
+    l = in_jvms->mon_size();
+    out_jvms->set_monoff(p);
+    for (j = 0; j < l; j++)
+      call->set_req(p++, in_map->in(k+j));
+
+    // Finish the new jvms.
+    out_jvms->set_endoff(p);
+
+    assert(out_jvms->endoff()     == debug_end,             "fill ptr must match");
+    assert(out_jvms->depth()      == in_jvms->depth(),      "depth must match");
+    assert(out_jvms->loc_size()   == in_jvms->loc_size(),   "size must match");
+    assert(out_jvms->mon_size()   == in_jvms->mon_size(),   "size must match");
+    assert(out_jvms->debug_size() == in_jvms->debug_size(), "size must match");
+
+    // Update the two tail pointers in parallel.
+    out_jvms = out_jvms->caller();
+    in_jvms  = in_jvms->caller();
+  }
+
+  assert(debug_ptr == non_debug_edges, "debug info must fit exactly");
+
+  // Test the correctness of JVMState::debug_xxx accessors:
+  assert(call->jvms()->debug_start() == non_debug_edges, "");
+  assert(call->jvms()->debug_end()   == call->req(), "");
+  assert(call->jvms()->debug_depth() == call->req() - non_debug_edges, "");
+}
+
+bool GraphKit::compute_stack_effects(int& inputs, int& depth) {
+  Bytecodes::Code code = java_bc();
+  if (code == Bytecodes::_wide) {
+    code = method()->java_code_at_bci(bci() + 1);
+  }
+
+  BasicType rtype = T_ILLEGAL;
+  int       rsize = 0;
+
+  if (code != Bytecodes::_illegal) {
+    depth = Bytecodes::depth(code); // checkcast=0, athrow=-1
+    rtype = Bytecodes::result_type(code); // checkcast=P, athrow=V
+    if (rtype < T_CONFLICT)
+      rsize = type2size[rtype];
+  }
+
+  switch (code) {
+  case Bytecodes::_illegal:
+    return false;
+
+  case Bytecodes::_ldc:
+  case Bytecodes::_ldc_w:
+  case Bytecodes::_ldc2_w:
+    inputs = 0;
+    break;
+
+  case Bytecodes::_dup:         inputs = 1;  break;
+  case Bytecodes::_dup_x1:      inputs = 2;  break;
+  case Bytecodes::_dup_x2:      inputs = 3;  break;
+  case Bytecodes::_dup2:        inputs = 2;  break;
+  case Bytecodes::_dup2_x1:     inputs = 3;  break;
+  case Bytecodes::_dup2_x2:     inputs = 4;  break;
+  case Bytecodes::_swap:        inputs = 2;  break;
+  case Bytecodes::_arraylength: inputs = 1;  break;
+
+  case Bytecodes::_getstatic:
+  case Bytecodes::_putstatic:
+  case Bytecodes::_getfield:
+  case Bytecodes::_putfield:
+    {
+      bool is_get = (depth >= 0), is_static = (depth & 1);
+      bool ignore;
+      ciBytecodeStream iter(method());
+      iter.reset_to_bci(bci());
+      iter.next();
+      ciField* field = iter.get_field(ignore);
+      int      size  = field->type()->size();
+      inputs  = (is_static ? 0 : 1);
+      if (is_get) {
+        depth = size - inputs;
+      } else {
+        inputs += size;        // putxxx pops the value from the stack
+        depth = - inputs;
+      }
+    }
+    break;
+
+  case Bytecodes::_invokevirtual:
+  case Bytecodes::_invokespecial:
+  case Bytecodes::_invokestatic:
+  case Bytecodes::_invokeinterface:
+    {
+      bool is_static = (depth == 0);
+      bool ignore;
+      ciBytecodeStream iter(method());
+      iter.reset_to_bci(bci());
+      iter.next();
+      ciMethod* method = iter.get_method(ignore);
+      inputs = method->arg_size_no_receiver();
+      if (!is_static)  inputs += 1;
+      int size = method->return_type()->size();
+      depth = size - inputs;
+    }
+    break;
+
+  case Bytecodes::_multianewarray:
+    {
+      ciBytecodeStream iter(method());
+      iter.reset_to_bci(bci());
+      iter.next();
+      inputs = iter.get_dimensions();
+      assert(rsize == 1, "");
+      depth = rsize - inputs;
+    }
+    break;
+
+  case Bytecodes::_ireturn:
+  case Bytecodes::_lreturn:
+  case Bytecodes::_freturn:
+  case Bytecodes::_dreturn:
+  case Bytecodes::_areturn:
+    assert(rsize = -depth, "");
+    inputs = rsize;
+    break;
+
+  case Bytecodes::_jsr:
+  case Bytecodes::_jsr_w:
+    inputs = 0;
+    depth  = 1;                  // S.B. depth=1, not zero
+    break;
+
+  default:
+    // bytecode produces a typed result
+    inputs = rsize - depth;
+    assert(inputs >= 0, "");
+    break;
+  }
+
+#ifdef ASSERT
+  // spot check
+  int outputs = depth + inputs;
+  assert(outputs >= 0, "sanity");
+  switch (code) {
+  case Bytecodes::_checkcast: assert(inputs == 1 && outputs == 1, ""); break;
+  case Bytecodes::_athrow:    assert(inputs == 1 && outputs == 0, ""); break;
+  case Bytecodes::_aload_0:   assert(inputs == 0 && outputs == 1, ""); break;
+  case Bytecodes::_return:    assert(inputs == 0 && outputs == 0, ""); break;
+  case Bytecodes::_drem:      assert(inputs == 4 && outputs == 2, ""); break;
+  }
+#endif //ASSERT
+
+  return true;
+}
+
+
+
+//------------------------------basic_plus_adr---------------------------------
+Node* GraphKit::basic_plus_adr(Node* base, Node* ptr, Node* offset) {
+  // short-circuit a common case
+  if (offset == intcon(0))  return ptr;
+  return _gvn.transform( new (C, 4) AddPNode(base, ptr, offset) );
+}
+
+Node* GraphKit::ConvI2L(Node* offset) {
+  // short-circuit a common case
+  jint offset_con = find_int_con(offset, Type::OffsetBot);
+  if (offset_con != Type::OffsetBot) {
+    return longcon((long) offset_con);
+  }
+  return _gvn.transform( new (C, 2) ConvI2LNode(offset));
+}
+Node* GraphKit::ConvL2I(Node* offset) {
+  // short-circuit a common case
+  jlong offset_con = find_long_con(offset, (jlong)Type::OffsetBot);
+  if (offset_con != (jlong)Type::OffsetBot) {
+    return intcon((int) offset_con);
+  }
+  return _gvn.transform( new (C, 2) ConvL2INode(offset));
+}
+
+//-------------------------load_object_klass-----------------------------------
+Node* GraphKit::load_object_klass(Node* obj) {
+  // Special-case a fresh allocation to avoid building nodes:
+  Node* akls = AllocateNode::Ideal_klass(obj, &_gvn);
+  if (akls != NULL)  return akls;
+  Node* k_adr = basic_plus_adr(obj, oopDesc::klass_offset_in_bytes());
+  return _gvn.transform( new (C, 3) LoadKlassNode(0, immutable_memory(), k_adr, TypeInstPtr::KLASS) );
+}
+
+//-------------------------load_array_length-----------------------------------
+Node* GraphKit::load_array_length(Node* array) {
+  // Special-case a fresh allocation to avoid building nodes:
+  Node* alen = AllocateArrayNode::Ideal_length(array, &_gvn);
+  if (alen != NULL)  return alen;
+  Node *r_adr = basic_plus_adr(array, arrayOopDesc::length_offset_in_bytes());
+  return _gvn.transform( new (C, 3) LoadRangeNode(0, immutable_memory(), r_adr, TypeInt::POS));
+}
+
+//------------------------------do_null_check----------------------------------
+// Helper function to do a NULL pointer check.  Returned value is
+// the incoming address with NULL casted away.  You are allowed to use the
+// not-null value only if you are control dependent on the test.
+extern int explicit_null_checks_inserted,
+           explicit_null_checks_elided;
+Node* GraphKit::null_check_common(Node* value, BasicType type,
+                                  // optional arguments for variations:
+                                  bool assert_null,
+                                  Node* *null_control) {
+  assert(!assert_null || null_control == NULL, "not both at once");
+  if (stopped())  return top();
+  if (!GenerateCompilerNullChecks && !assert_null && null_control == NULL) {
+    // For some performance testing, we may wish to suppress null checking.
+    value = cast_not_null(value);   // Make it appear to be non-null (4962416).
+    return value;
+  }
+  explicit_null_checks_inserted++;
+
+  // Construct NULL check
+  Node *chk = NULL;
+  switch(type) {
+    case T_LONG   : chk = new (C, 3) CmpLNode(value, _gvn.zerocon(T_LONG)); break;
+    case T_INT    : chk = new (C, 3) CmpINode( value, _gvn.intcon(0)); break;
+    case T_ARRAY  : // fall through
+      type = T_OBJECT;  // simplify further tests
+    case T_OBJECT : {
+      const Type *t = _gvn.type( value );
+
+      const TypeInstPtr* tp = t->isa_instptr();
+      if (tp != NULL && !tp->klass()->is_loaded()
+          // Only for do_null_check, not any of its siblings:
+          && !assert_null && null_control == NULL) {
+        // Usually, any field access or invocation on an unloaded oop type
+        // will simply fail to link, since the statically linked class is
+        // likely also to be unloaded.  However, in -Xcomp mode, sometimes
+        // the static class is loaded but the sharper oop type is not.
+        // Rather than checking for this obscure case in lots of places,
+        // we simply observe that a null check on an unloaded class
+        // will always be followed by a nonsense operation, so we
+        // can just issue the uncommon trap here.
+        // Our access to the unloaded class will only be correct
+        // after it has been loaded and initialized, which requires
+        // a trip through the interpreter.
+#ifndef PRODUCT
+        if (WizardMode) { tty->print("Null check of unloaded "); tp->klass()->print(); tty->cr(); }
+#endif
+        uncommon_trap(Deoptimization::Reason_unloaded,
+                      Deoptimization::Action_reinterpret,
+                      tp->klass(), "!loaded");
+        return top();
+      }
+
+      if (assert_null) {
+        // See if the type is contained in NULL_PTR.
+        // If so, then the value is already null.
+        if (t->higher_equal(TypePtr::NULL_PTR)) {
+          explicit_null_checks_elided++;
+          return value;           // Elided null assert quickly!
+        }
+      } else {
+        // See if mixing in the NULL pointer changes type.
+        // If so, then the NULL pointer was not allowed in the original
+        // type.  In other words, "value" was not-null.
+        if (t->meet(TypePtr::NULL_PTR) != t) {
+          // same as: if (!TypePtr::NULL_PTR->higher_equal(t)) ...
+          explicit_null_checks_elided++;
+          return value;           // Elided null check quickly!
+        }
+      }
+      chk = new (C, 3) CmpPNode( value, null() );
+      break;
+    }
+
+    default      : ShouldNotReachHere();
+  }
+  assert(chk != NULL, "sanity check");
+  chk = _gvn.transform(chk);
+
+  BoolTest::mask btest = assert_null ? BoolTest::eq : BoolTest::ne;
+  BoolNode *btst = new (C, 2) BoolNode( chk, btest);
+  Node   *tst = _gvn.transform( btst );
+
+  //-----------
+  // if peephole optimizations occured, a prior test existed.
+  // If a prior test existed, maybe it dominates as we can avoid this test.
+  if (tst != btst && type == T_OBJECT) {
+    // At this point we want to scan up the CFG to see if we can
+    // find an identical test (and so avoid this test altogether).
+    Node *cfg = control();
+    int depth = 0;
+    while( depth < 16 ) {       // Limit search depth for speed
+      if( cfg->Opcode() == Op_IfTrue &&
+          cfg->in(0)->in(1) == tst ) {
+        // Found prior test.  Use "cast_not_null" to construct an identical
+        // CastPP (and hence hash to) as already exists for the prior test.
+        // Return that casted value.
+        if (assert_null) {
+          replace_in_map(value, null());
+          return null();  // do not issue the redundant test
+        }
+        Node *oldcontrol = control();
+        set_control(cfg);
+        Node *res = cast_not_null(value);
+        set_control(oldcontrol);
+        explicit_null_checks_elided++;
+        return res;
+      }
+      cfg = IfNode::up_one_dom(cfg, /*linear_only=*/ true);
+      if (cfg == NULL)  break;  // Quit at region nodes
+      depth++;
+    }
+  }
+
+  //-----------
+  // Branch to failure if null
+  float ok_prob = PROB_MAX;  // a priori estimate:  nulls never happen
+  Deoptimization::DeoptReason reason;
+  if (assert_null)
+    reason = Deoptimization::Reason_null_assert;
+  else if (type == T_OBJECT)
+    reason = Deoptimization::Reason_null_check;
+  else
+    reason = Deoptimization::Reason_div0_check;
+
+  // To cause an implicit null check, we set the not-null probability
+  // to the maximum (PROB_MAX).  For an explicit check the probablity
+  // is set to a smaller value.
+  if (null_control != NULL || too_many_traps(reason)) {
+    // probability is less likely
+    ok_prob =  PROB_LIKELY_MAG(3);
+  } else if (!assert_null &&
+             (ImplicitNullCheckThreshold > 0) &&
+             method() != NULL &&
+             (method()->method_data()->trap_count(reason)
+              >= (uint)ImplicitNullCheckThreshold)) {
+    ok_prob =  PROB_LIKELY_MAG(3);
+  }
+
+  if (null_control != NULL) {
+    IfNode* iff = create_and_map_if(control(), tst, ok_prob, COUNT_UNKNOWN);
+    Node* null_true = _gvn.transform( new (C, 1) IfFalseNode(iff));
+    set_control(      _gvn.transform( new (C, 1) IfTrueNode(iff)));
+    if (null_true == top())
+      explicit_null_checks_elided++;
+    (*null_control) = null_true;
+  } else {
+    BuildCutout unless(this, tst, ok_prob);
+    // Check for optimizer eliding test at parse time
+    if (stopped()) {
+      // Failure not possible; do not bother making uncommon trap.
+      explicit_null_checks_elided++;
+    } else if (assert_null) {
+      uncommon_trap(reason,
+                    Deoptimization::Action_make_not_entrant,
+                    NULL, "assert_null");
+    } else {
+      builtin_throw(reason);
+    }
+  }
+
+  // Must throw exception, fall-thru not possible?
+  if (stopped()) {
+    return top();               // No result
+  }
+
+  if (assert_null) {
+    // Cast obj to null on this path.
+    replace_in_map(value, zerocon(type));
+    return zerocon(type);
+  }
+
+  // Cast obj to not-null on this path, if there is no null_control.
+  // (If there is a null_control, a non-null value may come back to haunt us.)
+  if (type == T_OBJECT) {
+    Node* cast = cast_not_null(value, false);
+    if (null_control == NULL || (*null_control) == top())
+      replace_in_map(value, cast);
+    value = cast;
+  }
+
+  return value;
+}
+
+
+//------------------------------cast_not_null----------------------------------
+// Cast obj to not-null on this path
+Node* GraphKit::cast_not_null(Node* obj, bool do_replace_in_map) {
+  const Type *t = _gvn.type(obj);
+  const Type *t_not_null = t->join(TypePtr::NOTNULL);
+  // Object is already not-null?
+  if( t == t_not_null ) return obj;
+
+  Node *cast = new (C, 2) CastPPNode(obj,t_not_null);
+  cast->init_req(0, control());
+  cast = _gvn.transform( cast );
+
+  // Scan for instances of 'obj' in the current JVM mapping.
+  // These instances are known to be not-null after the test.
+  if (do_replace_in_map)
+    replace_in_map(obj, cast);
+
+  return cast;                  // Return casted value
+}
+
+
+//--------------------------replace_in_map-------------------------------------
+void GraphKit::replace_in_map(Node* old, Node* neww) {
+  this->map()->replace_edge(old, neww);
+
+  // Note: This operation potentially replaces any edge
+  // on the map.  This includes locals, stack, and monitors
+  // of the current (innermost) JVM state.
+
+  // We can consider replacing in caller maps.
+  // The idea would be that an inlined function's null checks
+  // can be shared with the entire inlining tree.
+  // The expense of doing this is that the PreserveJVMState class
+  // would have to preserve caller states too, with a deep copy.
+}
+
+
+
+//=============================================================================
+//--------------------------------memory---------------------------------------
+Node* GraphKit::memory(uint alias_idx) {
+  MergeMemNode* mem = merged_memory();
+  Node* p = mem->memory_at(alias_idx);
+  _gvn.set_type(p, Type::MEMORY);  // must be mapped
+  return p;
+}
+
+//-----------------------------reset_memory------------------------------------
+Node* GraphKit::reset_memory() {
+  Node* mem = map()->memory();
+  // do not use this node for any more parsing!
+  debug_only( map()->set_memory((Node*)NULL) );
+  return _gvn.transform( mem );
+}
+
+//------------------------------set_all_memory---------------------------------
+void GraphKit::set_all_memory(Node* newmem) {
+  Node* mergemem = MergeMemNode::make(C, newmem);
+  gvn().set_type_bottom(mergemem);
+  map()->set_memory(mergemem);
+}
+
+//------------------------------set_all_memory_call----------------------------
+void GraphKit::set_all_memory_call(Node* call) {
+  Node* newmem = _gvn.transform( new (C, 1) ProjNode(call, TypeFunc::Memory) );
+  set_all_memory(newmem);
+}
+
+//=============================================================================
+//
+// parser factory methods for MemNodes
+//
+// These are layered on top of the factory methods in LoadNode and StoreNode,
+// and integrate with the parser's memory state and _gvn engine.
+//
+
+// factory methods in "int adr_idx"
+Node* GraphKit::make_load(Node* ctl, Node* adr, const Type* t, BasicType bt,
+                          int adr_idx,
+                          bool require_atomic_access) {
+  assert(adr_idx != Compile::AliasIdxTop, "use other make_load factory" );
+  const TypePtr* adr_type = NULL; // debug-mode-only argument
+  debug_only(adr_type = C->get_adr_type(adr_idx));
+  Node* mem = memory(adr_idx);
+  Node* ld;
+  if (require_atomic_access && bt == T_LONG) {
+    ld = LoadLNode::make_atomic(C, ctl, mem, adr, adr_type, t);
+  } else {
+    ld = LoadNode::make(C, ctl, mem, adr, adr_type, t, bt);
+  }
+  return _gvn.transform(ld);
+}
+
+Node* GraphKit::store_to_memory(Node* ctl, Node* adr, Node *val, BasicType bt,
+                                int adr_idx,
+                                bool require_atomic_access) {
+  assert(adr_idx != Compile::AliasIdxTop, "use other store_to_memory factory" );
+  const TypePtr* adr_type = NULL;
+  debug_only(adr_type = C->get_adr_type(adr_idx));
+  Node *mem = memory(adr_idx);
+  Node* st;
+  if (require_atomic_access && bt == T_LONG) {
+    st = StoreLNode::make_atomic(C, ctl, mem, adr, adr_type, val);
+  } else {
+    st = StoreNode::make(C, ctl, mem, adr, adr_type, val, bt);
+  }
+  st = _gvn.transform(st);
+  set_memory(st, adr_idx);
+  // Back-to-back stores can only remove intermediate store with DU info
+  // so push on worklist for optimizer.
+  if (mem->req() > MemNode::Address && adr == mem->in(MemNode::Address))
+    record_for_igvn(st);
+
+  return st;
+}
+
+void GraphKit::pre_barrier(Node* ctl,
+                           Node* obj,
+                           Node* adr,
+                           uint adr_idx,
+                           Node *val,
+                           const Type* val_type,
+                           BasicType bt) {
+  BarrierSet* bs = Universe::heap()->barrier_set();
+  set_control(ctl);
+  switch (bs->kind()) {
+
+    case BarrierSet::CardTableModRef:
+    case BarrierSet::CardTableExtension:
+    case BarrierSet::ModRef:
+      break;
+
+    case BarrierSet::Other:
+    default      :
+      ShouldNotReachHere();
+
+  }
+}
+
+void GraphKit::post_barrier(Node* ctl,
+                            Node* store,
+                            Node* obj,
+                            Node* adr,
+                            uint adr_idx,
+                            Node *val,
+                            BasicType bt,
+                            bool use_precise) {
+  BarrierSet* bs = Universe::heap()->barrier_set();
+  set_control(ctl);
+  switch (bs->kind()) {
+
+    case BarrierSet::CardTableModRef:
+    case BarrierSet::CardTableExtension:
+      write_barrier_post(store, obj, adr, val, use_precise);
+      break;
+
+    case BarrierSet::ModRef:
+      break;
+
+    case BarrierSet::Other:
+    default      :
+      ShouldNotReachHere();
+
+  }
+}
+
+Node* GraphKit::store_oop_to_object(Node* ctl,
+                                    Node* obj,
+                                    Node* adr,
+                                    const TypePtr* adr_type,
+                                    Node *val,
+                                    const Type* val_type,
+                                    BasicType bt) {
+  uint adr_idx = C->get_alias_index(adr_type);
+  Node* store;
+  pre_barrier(ctl, obj, adr, adr_idx, val, val_type, bt);
+  store = store_to_memory(control(), adr, val, bt, adr_idx);
+  post_barrier(control(), store, obj, adr, adr_idx, val, bt, false);
+  return store;
+}
+
+Node* GraphKit::store_oop_to_array(Node* ctl,
+                                   Node* obj,
+                                   Node* adr,
+                                   const TypePtr* adr_type,
+                                   Node *val,
+                                   const Type* val_type,
+                                   BasicType bt) {
+  uint adr_idx = C->get_alias_index(adr_type);
+  Node* store;
+  pre_barrier(ctl, obj, adr, adr_idx, val, val_type, bt);
+  store = store_to_memory(control(), adr, val, bt, adr_idx);
+  post_barrier(control(), store, obj, adr, adr_idx, val, bt, true);
+  return store;
+}
+
+Node* GraphKit::store_oop_to_unknown(Node* ctl,
+                                     Node* obj,
+                                     Node* adr,
+                                     const TypePtr* adr_type,
+                                     Node *val,
+                                     const Type* val_type,
+                                     BasicType bt) {
+  uint adr_idx = C->get_alias_index(adr_type);
+  Node* store;
+  pre_barrier(ctl, obj, adr, adr_idx, val, val_type, bt);
+  store = store_to_memory(control(), adr, val, bt, adr_idx);
+  post_barrier(control(), store, obj, adr, adr_idx, val, bt, true);
+  return store;
+}
+
+
+//-------------------------array_element_address-------------------------
+Node* GraphKit::array_element_address(Node* ary, Node* idx, BasicType elembt,
+                                      const TypeInt* sizetype) {
+  uint shift  = exact_log2(type2aelembytes[elembt]);
+  uint header = arrayOopDesc::base_offset_in_bytes(elembt);
+
+  // short-circuit a common case (saves lots of confusing waste motion)
+  jint idx_con = find_int_con(idx, -1);
+  if (idx_con >= 0) {
+    intptr_t offset = header + ((intptr_t)idx_con << shift);
+    return basic_plus_adr(ary, offset);
+  }
+
+  // must be correct type for alignment purposes
+  Node* base  = basic_plus_adr(ary, header);
+#ifdef _LP64
+  // The scaled index operand to AddP must be a clean 64-bit value.
+  // Java allows a 32-bit int to be incremented to a negative
+  // value, which appears in a 64-bit register as a large
+  // positive number.  Using that large positive number as an
+  // operand in pointer arithmetic has bad consequences.
+  // On the other hand, 32-bit overflow is rare, and the possibility
+  // can often be excluded, if we annotate the ConvI2L node with
+  // a type assertion that its value is known to be a small positive
+  // number.  (The prior range check has ensured this.)
+  // This assertion is used by ConvI2LNode::Ideal.
+  int index_max = max_jint - 1;  // array size is max_jint, index is one less
+  if (sizetype != NULL)  index_max = sizetype->_hi - 1;
+  const TypeLong* lidxtype = TypeLong::make(CONST64(0), index_max, Type::WidenMax);
+  idx = _gvn.transform( new (C, 2) ConvI2LNode(idx, lidxtype) );
+#endif
+  Node* scale = _gvn.transform( new (C, 3) LShiftXNode(idx, intcon(shift)) );
+  return basic_plus_adr(ary, base, scale);
+}
+
+//-------------------------load_array_element-------------------------
+Node* GraphKit::load_array_element(Node* ctl, Node* ary, Node* idx, const TypeAryPtr* arytype) {
+  const Type* elemtype = arytype->elem();
+  BasicType elembt = elemtype->array_element_basic_type();
+  Node* adr = array_element_address(ary, idx, elembt, arytype->size());
+  Node* ld = make_load(ctl, adr, elemtype, elembt, arytype);
+  return ld;
+}
+
+//-------------------------set_arguments_for_java_call-------------------------
+// Arguments (pre-popped from the stack) are taken from the JVMS.
+void GraphKit::set_arguments_for_java_call(CallJavaNode* call) {
+  // Add the call arguments:
+  uint nargs = call->method()->arg_size();
+  for (uint i = 0; i < nargs; i++) {
+    Node* arg = argument(i);
+    call->init_req(i + TypeFunc::Parms, arg);
+  }
+}
+
+//---------------------------set_edges_for_java_call---------------------------
+// Connect a newly created call into the current JVMS.
+// A return value node (if any) is returned from set_edges_for_java_call.
+void GraphKit::set_edges_for_java_call(CallJavaNode* call, bool must_throw) {
+
+  // Add the predefined inputs:
+  call->init_req( TypeFunc::Control, control() );
+  call->init_req( TypeFunc::I_O    , i_o() );
+  call->init_req( TypeFunc::Memory , reset_memory() );
+  call->init_req( TypeFunc::FramePtr, frameptr() );
+  call->init_req( TypeFunc::ReturnAdr, top() );
+
+  add_safepoint_edges(call, must_throw);
+
+  Node* xcall = _gvn.transform(call);
+
+  if (xcall == top()) {
+    set_control(top());
+    return;
+  }
+  assert(xcall == call, "call identity is stable");
+
+  // Re-use the current map to produce the result.
+
+  set_control(_gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Control)));
+  set_i_o(    _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::I_O    )));
+  set_all_memory_call(xcall);
+
+  //return xcall;   // no need, caller already has it
+}
+
+Node* GraphKit::set_results_for_java_call(CallJavaNode* call) {
+  if (stopped())  return top();  // maybe the call folded up?
+
+  // Capture the return value, if any.
+  Node* ret;
+  if (call->method() == NULL ||
+      call->method()->return_type()->basic_type() == T_VOID)
+        ret = top();
+  else  ret = _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms));
+
+  // Note:  Since any out-of-line call can produce an exception,
+  // we always insert an I_O projection from the call into the result.
+
+  make_slow_call_ex(call, env()->Throwable_klass(), false);
+
+  return ret;
+}
+
+//--------------------set_predefined_input_for_runtime_call--------------------
+// Reading and setting the memory state is way conservative here.
+// The real problem is that I am not doing real Type analysis on memory,
+// so I cannot distinguish card mark stores from other stores.  Across a GC
+// point the Store Barrier and the card mark memory has to agree.  I cannot
+// have a card mark store and its barrier split across the GC point from
+// either above or below.  Here I get that to happen by reading ALL of memory.
+// A better answer would be to separate out card marks from other memory.
+// For now, return the input memory state, so that it can be reused
+// after the call, if this call has restricted memory effects.
+Node* GraphKit::set_predefined_input_for_runtime_call(SafePointNode* call) {
+  // Set fixed predefined input arguments
+  Node* memory = reset_memory();
+  call->init_req( TypeFunc::Control,   control()  );
+  call->init_req( TypeFunc::I_O,       top()      ); // does no i/o
+  call->init_req( TypeFunc::Memory,    memory     ); // may gc ptrs
+  call->init_req( TypeFunc::FramePtr,  frameptr() );
+  call->init_req( TypeFunc::ReturnAdr, top()      );
+  return memory;
+}
+
+//-------------------set_predefined_output_for_runtime_call--------------------
+// Set control and memory (not i_o) from the call.
+// If keep_mem is not NULL, use it for the output state,
+// except for the RawPtr output of the call, if hook_mem is TypeRawPtr::BOTTOM.
+// If hook_mem is NULL, this call produces no memory effects at all.
+// If hook_mem is a Java-visible memory slice (such as arraycopy operands),
+// then only that memory slice is taken from the call.
+// In the last case, we must put an appropriate memory barrier before
+// the call, so as to create the correct anti-dependencies on loads
+// preceding the call.
+void GraphKit::set_predefined_output_for_runtime_call(Node* call,
+                                                      Node* keep_mem,
+                                                      const TypePtr* hook_mem) {
+  // no i/o
+  set_control(_gvn.transform( new (C, 1) ProjNode(call,TypeFunc::Control) ));
+  if (keep_mem) {
+    // First clone the existing memory state
+    set_all_memory(keep_mem);
+    if (hook_mem != NULL) {
+      // Make memory for the call
+      Node* mem = _gvn.transform( new (C, 1) ProjNode(call, TypeFunc::Memory) );
+      // Set the RawPtr memory state only.  This covers all the heap top/GC stuff
+      // We also use hook_mem to extract specific effects from arraycopy stubs.
+      set_memory(mem, hook_mem);
+    }
+    // ...else the call has NO memory effects.
+
+    // Make sure the call advertises its memory effects precisely.
+    // This lets us build accurate anti-dependences in gcm.cpp.
+    assert(C->alias_type(call->adr_type()) == C->alias_type(hook_mem),
+           "call node must be constructed correctly");
+  } else {
+    assert(hook_mem == NULL, "");
+    // This is not a "slow path" call; all memory comes from the call.
+    set_all_memory_call(call);
+  }
+}
+
+//------------------------------increment_counter------------------------------
+// for statistics: increment a VM counter by 1
+
+void GraphKit::increment_counter(address counter_addr) {
+  Node* adr1 = makecon(TypeRawPtr::make(counter_addr));
+  increment_counter(adr1);
+}
+
+void GraphKit::increment_counter(Node* counter_addr) {
+  int adr_type = Compile::AliasIdxRaw;
+  Node* cnt  = make_load(NULL, counter_addr, TypeInt::INT, T_INT, adr_type);
+  Node* incr = _gvn.transform(new (C, 3) AddINode(cnt, _gvn.intcon(1)));
+  store_to_memory( NULL, counter_addr, incr, T_INT, adr_type );
+}
+
+
+//------------------------------uncommon_trap----------------------------------
+// Bail out to the interpreter in mid-method.  Implemented by calling the
+// uncommon_trap blob.  This helper function inserts a runtime call with the
+// right debug info.
+void GraphKit::uncommon_trap(int trap_request,
+                             ciKlass* klass, const char* comment,
+                             bool must_throw,
+                             bool keep_exact_action) {
+  if (failing())  stop();
+  if (stopped())  return; // trap reachable?
+
+  // Note:  If ProfileTraps is true, and if a deopt. actually
+  // occurs here, the runtime will make sure an MDO exists.  There is
+  // no need to call method()->build_method_data() at this point.
+
+#ifdef ASSERT
+  if (!must_throw) {
+    // Make sure the stack has at least enough depth to execute
+    // the current bytecode.
+    int inputs, ignore;
+    if (compute_stack_effects(inputs, ignore)) {
+      assert(sp() >= inputs, "must have enough JVMS stack to execute");
+      // It is a frequent error in library_call.cpp to issue an
+      // uncommon trap with the _sp value already popped.
+    }
+  }
+#endif
+
+  Deoptimization::DeoptReason reason = Deoptimization::trap_request_reason(trap_request);
+  Deoptimization::DeoptAction action = Deoptimization::trap_request_action(trap_request);
+
+  switch (action) {
+  case Deoptimization::Action_maybe_recompile:
+  case Deoptimization::Action_reinterpret:
+    // Temporary fix for 6529811 to allow virtual calls to be sure they
+    // get the chance to go from mono->bi->mega
+    if (!keep_exact_action &&
+        Deoptimization::trap_request_index(trap_request) < 0 &&
+        too_many_recompiles(reason)) {
+      // This BCI is causing too many recompilations.
+      action = Deoptimization::Action_none;
+      trap_request = Deoptimization::make_trap_request(reason, action);
+    } else {
+      C->set_trap_can_recompile(true);
+    }
+    break;
+  case Deoptimization::Action_make_not_entrant:
+    C->set_trap_can_recompile(true);
+    break;
+#ifdef ASSERT
+  case Deoptimization::Action_none:
+  case Deoptimization::Action_make_not_compilable:
+    break;
+  default:
+    assert(false, "bad action");
+#endif
+  }
+
+  if (TraceOptoParse) {
+    char buf[100];
+    tty->print_cr("Uncommon trap %s at bci:%d",
+                  Deoptimization::format_trap_request(buf, sizeof(buf),
+                                                      trap_request), bci());
+  }
+
+  CompileLog* log = C->log();
+  if (log != NULL) {
+    int kid = (klass == NULL)? -1: log->identify(klass);
+    log->begin_elem("uncommon_trap bci='%d'", bci());
+    char buf[100];
+    log->print(" %s", Deoptimization::format_trap_request(buf, sizeof(buf),
+                                                          trap_request));
+    if (kid >= 0)         log->print(" klass='%d'", kid);
+    if (comment != NULL)  log->print(" comment='%s'", comment);
+    log->end_elem();
+  }
+
+  // Make sure any guarding test views this path as very unlikely
+  Node *i0 = control()->in(0);
+  if (i0 != NULL && i0->is_If()) {        // Found a guarding if test?
+    IfNode *iff = i0->as_If();
+    float f = iff->_prob;   // Get prob
+    if (control()->Opcode() == Op_IfTrue) {
+      if (f > PROB_UNLIKELY_MAG(4))
+        iff->_prob = PROB_MIN;
+    } else {
+      if (f < PROB_LIKELY_MAG(4))
+        iff->_prob = PROB_MAX;
+    }
+  }
+
+  // Clear out dead values from the debug info.
+  kill_dead_locals();
+
+  // Now insert the uncommon trap subroutine call
+  address call_addr = SharedRuntime::uncommon_trap_blob()->instructions_begin();
+  const TypePtr* no_memory_effects = NULL;
+  // Pass the index of the class to be loaded
+  Node* call = make_runtime_call(RC_NO_LEAF | RC_UNCOMMON |
+                                 (must_throw ? RC_MUST_THROW : 0),
+                                 OptoRuntime::uncommon_trap_Type(),
+                                 call_addr, "uncommon_trap", no_memory_effects,
+                                 intcon(trap_request));
+  assert(call->as_CallStaticJava()->uncommon_trap_request() == trap_request,
+         "must extract request correctly from the graph");
+  assert(trap_request != 0, "zero value reserved by uncommon_trap_request");
+
+  call->set_req(TypeFunc::ReturnAdr, returnadr());
+  // The debug info is the only real input to this call.
+
+  // Halt-and-catch fire here.  The above call should never return!
+  HaltNode* halt = new(C, TypeFunc::Parms) HaltNode(control(), frameptr());
+  _gvn.set_type_bottom(halt);
+  root()->add_req(halt);
+
+  stop_and_kill_map();
+}
+
+
+//--------------------------just_allocated_object------------------------------
+// Report the object that was just allocated.
+// It must be the case that there are no intervening safepoints.
+// We use this to determine if an object is so "fresh" that
+// it does not require card marks.
+Node* GraphKit::just_allocated_object(Node* current_control) {
+  if (C->recent_alloc_ctl() == current_control)
+    return C->recent_alloc_obj();
+  return NULL;
+}
+
+
+//------------------------------store_barrier----------------------------------
+// Insert a write-barrier store.  This is to let generational GC work; we have
+// to flag all oop-stores before the next GC point.
+void GraphKit::write_barrier_post(Node* oop_store, Node* obj, Node* adr,
+                                  Node* val, bool use_precise) {
+  // No store check needed if we're storing a NULL or an old object
+  // (latter case is probably a string constant). The concurrent
+  // mark sweep garbage collector, however, needs to have all nonNull
+  // oop updates flagged via card-marks.
+  if (val != NULL && val->is_Con()) {
+    // must be either an oop or NULL
+    const Type* t = val->bottom_type();
+    if (t == TypePtr::NULL_PTR || t == Type::TOP)
+      // stores of null never (?) need barriers
+      return;
+    ciObject* con = t->is_oopptr()->const_oop();
+    if (con != NULL
+        && con->is_perm()
+        && Universe::heap()->can_elide_permanent_oop_store_barriers())
+      // no store barrier needed, because no old-to-new ref created
+      return;
+  }
+
+  if (use_ReduceInitialCardMarks()
+      && obj == just_allocated_object(control())) {
+    // We can skip marks on a freshly-allocated object.
+    // Keep this code in sync with do_eager_card_mark in runtime.cpp.
+    // That routine eagerly marks the occasional object which is produced
+    // by the slow path, so that we don't have to do it here.
+    return;
+  }
+
+  if (!use_precise) {
+    // All card marks for a (non-array) instance are in one place:
+    adr = obj;
+  }
+  // (Else it's an array (or unknown), and we want more precise card marks.)
+  assert(adr != NULL, "");
+
+  // Get the alias_index for raw card-mark memory
+  int adr_type = Compile::AliasIdxRaw;
+  // Convert the pointer to an int prior to doing math on it
+  Node* cast = _gvn.transform(new (C, 2) CastP2XNode(control(), adr));
+  // Divide by card size
+  assert(Universe::heap()->barrier_set()->kind() == BarrierSet::CardTableModRef,
+         "Only one we handle so far.");
+  CardTableModRefBS* ct =
+    (CardTableModRefBS*)(Universe::heap()->barrier_set());
+  Node *b = _gvn.transform(new (C, 3) URShiftXNode( cast, _gvn.intcon(CardTableModRefBS::card_shift) ));
+  // We store into a byte array, so do not bother to left-shift by zero
+  // Get base of card map
+  assert(sizeof(*ct->byte_map_base) == sizeof(jbyte),
+         "adjust this code");
+  Node *c = makecon(TypeRawPtr::make((address)ct->byte_map_base));
+  // Combine
+  Node *sb_ctl = control();
+  Node *sb_adr = _gvn.transform(new (C, 4) AddPNode( top()/*no base ptr*/, c, b ));
+  Node *sb_val = _gvn.intcon(0);
+  // Smash zero into card
+  if( !UseConcMarkSweepGC ) {
+    BasicType bt = T_BYTE;
+    store_to_memory(sb_ctl, sb_adr, sb_val, bt, adr_type);
+  } else {
+    // Specialized path for CM store barrier
+    cms_card_mark( sb_ctl, sb_adr, sb_val, oop_store);
+  }
+}
+
+// Specialized path for CMS store barrier
+void GraphKit::cms_card_mark(Node* ctl, Node* adr, Node* val, Node *oop_store) {
+  BasicType bt = T_BYTE;
+  int adr_idx = Compile::AliasIdxRaw;
+  Node* mem = memory(adr_idx);
+
+  // The type input is NULL in PRODUCT builds
+  const TypePtr* type = NULL;
+  debug_only(type = C->get_adr_type(adr_idx));
+
+  // Add required edge to oop_store, optimizer does not support precedence edges.
+  // Convert required edge to precedence edge before allocation.
+  Node *store = _gvn.transform( new (C, 5) StoreCMNode(ctl, mem, adr, type, val, oop_store) );
+  set_memory(store, adr_idx);
+
+  // For CMS, back-to-back card-marks can only remove the first one
+  // and this requires DU info.  Push on worklist for optimizer.
+  if (mem->req() > MemNode::Address && adr == mem->in(MemNode::Address))
+    record_for_igvn(store);
+}
+
+
+void GraphKit::round_double_arguments(ciMethod* dest_method) {
+  // (Note:  TypeFunc::make has a cache that makes this fast.)
+  const TypeFunc* tf    = TypeFunc::make(dest_method);
+  int             nargs = tf->_domain->_cnt - TypeFunc::Parms;
+  for (int j = 0; j < nargs; j++) {
+    const Type *targ = tf->_domain->field_at(j + TypeFunc::Parms);
+    if( targ->basic_type() == T_DOUBLE ) {
+      // If any parameters are doubles, they must be rounded before
+      // the call, dstore_rounding does gvn.transform
+      Node *arg = argument(j);
+      arg = dstore_rounding(arg);
+      set_argument(j, arg);
+    }
+  }
+}
+
+void GraphKit::round_double_result(ciMethod* dest_method) {
+  // A non-strict method may return a double value which has an extended
+  // exponent, but this must not be visible in a caller which is 'strict'
+  // If a strict caller invokes a non-strict callee, round a double result
+
+  BasicType result_type = dest_method->return_type()->basic_type();
+  assert( method() != NULL, "must have caller context");
+  if( result_type == T_DOUBLE && method()->is_strict() && !dest_method->is_strict() ) {
+    // Destination method's return value is on top of stack
+    // dstore_rounding() does gvn.transform
+    Node *result = pop_pair();
+    result = dstore_rounding(result);
+    push_pair(result);
+  }
+}
+
+// rounding for strict float precision conformance
+Node* GraphKit::precision_rounding(Node* n) {
+  return UseStrictFP && _method->flags().is_strict()
+    && UseSSE == 0 && Matcher::strict_fp_requires_explicit_rounding
+    ? _gvn.transform( new (C, 2) RoundFloatNode(0, n) )
+    : n;
+}
+
+// rounding for strict double precision conformance
+Node* GraphKit::dprecision_rounding(Node *n) {
+  return UseStrictFP && _method->flags().is_strict()
+    && UseSSE <= 1 && Matcher::strict_fp_requires_explicit_rounding
+    ? _gvn.transform( new (C, 2) RoundDoubleNode(0, n) )
+    : n;
+}
+
+// rounding for non-strict double stores
+Node* GraphKit::dstore_rounding(Node* n) {
+  return Matcher::strict_fp_requires_explicit_rounding
+    && UseSSE <= 1
+    ? _gvn.transform( new (C, 2) RoundDoubleNode(0, n) )
+    : n;
+}
+
+//=============================================================================
+// Generate a fast path/slow path idiom.  Graph looks like:
+// [foo] indicates that 'foo' is a parameter
+//
+//              [in]     NULL
+//                 \    /
+//                  CmpP
+//                  Bool ne
+//                   If
+//                  /  \
+//              True    False-<2>
+//              / |
+//             /  cast_not_null
+//           Load  |    |   ^
+//        [fast_test]   |   |
+// gvn to   opt_test    |   |
+//          /    \      |  <1>
+//      True     False  |
+//        |         \\  |
+//   [slow_call]     \[fast_result]
+//    Ctl   Val       \      \
+//     |               \      \
+//    Catch       <1>   \      \
+//   /    \        ^     \      \
+//  Ex    No_Ex    |      \      \
+//  |       \   \  |       \ <2>  \
+//  ...      \  [slow_res] |  |    \   [null_result]
+//            \         \--+--+---  |  |
+//             \           | /    \ | /
+//              --------Region     Phi
+//
+//=============================================================================
+// Code is structured as a series of driver functions all called 'do_XXX' that
+// call a set of helper functions.  Helper functions first, then drivers.
+
+//------------------------------null_check_oop---------------------------------
+// Null check oop.  Set null-path control into Region in slot 3.
+// Make a cast-not-nullness use the other not-null control.  Return cast.
+Node* GraphKit::null_check_oop(Node* value, Node* *null_control,
+                               bool never_see_null) {
+  // Initial NULL check taken path
+  (*null_control) = top();
+  Node* cast = null_check_common(value, T_OBJECT, false, null_control);
+
+  // Generate uncommon_trap:
+  if (never_see_null && (*null_control) != top()) {
+    // If we see an unexpected null at a check-cast we record it and force a
+    // recompile; the offending check-cast will be compiled to handle NULLs.
+    // If we see more than one offending BCI, then all checkcasts in the
+    // method will be compiled to handle NULLs.
+    PreserveJVMState pjvms(this);
+    set_control(*null_control);
+    uncommon_trap(Deoptimization::Reason_null_check,
+                  Deoptimization::Action_make_not_entrant);
+    (*null_control) = top();    // NULL path is dead
+  }
+
+  // Cast away null-ness on the result
+  return cast;
+}
+
+//------------------------------opt_iff----------------------------------------
+// Optimize the fast-check IfNode.  Set the fast-path region slot 2.
+// Return slow-path control.
+Node* GraphKit::opt_iff(Node* region, Node* iff) {
+  IfNode *opt_iff = _gvn.transform(iff)->as_If();
+
+  // Fast path taken; set region slot 2
+  Node *fast_taken = _gvn.transform( new (C, 1) IfFalseNode(opt_iff) );
+  region->init_req(2,fast_taken); // Capture fast-control
+
+  // Fast path not-taken, i.e. slow path
+  Node *slow_taken = _gvn.transform( new (C, 1) IfTrueNode(opt_iff) );
+  return slow_taken;
+}
+
+//-----------------------------make_runtime_call-------------------------------
+Node* GraphKit::make_runtime_call(int flags,
+                                  const TypeFunc* call_type, address call_addr,
+                                  const char* call_name,
+                                  const TypePtr* adr_type,
+                                  // The following parms are all optional.
+                                  // The first NULL ends the list.
+                                  Node* parm0, Node* parm1,
+                                  Node* parm2, Node* parm3,
+                                  Node* parm4, Node* parm5,
+                                  Node* parm6, Node* parm7) {
+  // Slow-path call
+  int size = call_type->domain()->cnt();
+  bool is_leaf = !(flags & RC_NO_LEAF);
+  bool has_io  = (!is_leaf && !(flags & RC_NO_IO));
+  if (call_name == NULL) {
+    assert(!is_leaf, "must supply name for leaf");
+    call_name = OptoRuntime::stub_name(call_addr);
+  }
+  CallNode* call;
+  if (!is_leaf) {
+    call = new(C, size) CallStaticJavaNode(call_type, call_addr, call_name,
+                                           bci(), adr_type);
+  } else if (flags & RC_NO_FP) {
+    call = new(C, size) CallLeafNoFPNode(call_type, call_addr, call_name, adr_type);
+  } else {
+    call = new(C, size) CallLeafNode(call_type, call_addr, call_name, adr_type);
+  }
+
+  // The following is similar to set_edges_for_java_call,
+  // except that the memory effects of the call are restricted to AliasIdxRaw.
+
+  // Slow path call has no side-effects, uses few values
+  bool wide_in  = !(flags & RC_NARROW_MEM);
+  bool wide_out = (C->get_alias_index(adr_type) == Compile::AliasIdxBot);
+
+  Node* prev_mem = NULL;
+  if (wide_in) {
+    prev_mem = set_predefined_input_for_runtime_call(call);
+  } else {
+    assert(!wide_out, "narrow in => narrow out");
+    Node* narrow_mem = memory(adr_type);
+    prev_mem = reset_memory();
+    map()->set_memory(narrow_mem);
+    set_predefined_input_for_runtime_call(call);
+  }
+
+  // Hook each parm in order.  Stop looking at the first NULL.
+  if (parm0 != NULL) { call->init_req(TypeFunc::Parms+0, parm0);
+  if (parm1 != NULL) { call->init_req(TypeFunc::Parms+1, parm1);
+  if (parm2 != NULL) { call->init_req(TypeFunc::Parms+2, parm2);
+  if (parm3 != NULL) { call->init_req(TypeFunc::Parms+3, parm3);
+  if (parm4 != NULL) { call->init_req(TypeFunc::Parms+4, parm4);
+  if (parm5 != NULL) { call->init_req(TypeFunc::Parms+5, parm5);
+  if (parm6 != NULL) { call->init_req(TypeFunc::Parms+6, parm6);
+  if (parm7 != NULL) { call->init_req(TypeFunc::Parms+7, parm7);
+    /* close each nested if ===> */  } } } } } } } }
+  assert(call->in(call->req()-1) != NULL, "must initialize all parms");
+
+  if (!is_leaf) {
+    // Non-leaves can block and take safepoints:
+    add_safepoint_edges(call, ((flags & RC_MUST_THROW) != 0));
+  }
+  // Non-leaves can throw exceptions:
+  if (has_io) {
+    call->set_req(TypeFunc::I_O, i_o());
+  }
+
+  if (flags & RC_UNCOMMON) {
+    // Set the count to a tiny probability.  Cf. Estimate_Block_Frequency.
+    // (An "if" probability corresponds roughly to an unconditional count.
+    // Sort of.)
+    call->set_cnt(PROB_UNLIKELY_MAG(4));
+  }
+
+  Node* c = _gvn.transform(call);
+  assert(c == call, "cannot disappear");
+
+  if (wide_out) {
+    // Slow path call has full side-effects.
+    set_predefined_output_for_runtime_call(call);
+  } else {
+    // Slow path call has few side-effects, and/or sets few values.
+    set_predefined_output_for_runtime_call(call, prev_mem, adr_type);
+  }
+
+  if (has_io) {
+    set_i_o(_gvn.transform(new (C, 1) ProjNode(call, TypeFunc::I_O)));
+  }
+  return call;
+
+}
+
+//------------------------------merge_memory-----------------------------------
+// Merge memory from one path into the current memory state.
+void GraphKit::merge_memory(Node* new_mem, Node* region, int new_path) {
+  for (MergeMemStream mms(merged_memory(), new_mem->as_MergeMem()); mms.next_non_empty2(); ) {
+    Node* old_slice = mms.force_memory();
+    Node* new_slice = mms.memory2();
+    if (old_slice != new_slice) {
+      PhiNode* phi;
+      if (new_slice->is_Phi() && new_slice->as_Phi()->region() == region) {
+        phi = new_slice->as_Phi();
+        #ifdef ASSERT
+        if (old_slice->is_Phi() && old_slice->as_Phi()->region() == region)
+          old_slice = old_slice->in(new_path);
+        // Caller is responsible for ensuring that any pre-existing
+        // phis are already aware of old memory.
+        int old_path = (new_path > 1) ? 1 : 2;  // choose old_path != new_path
+        assert(phi->in(old_path) == old_slice, "pre-existing phis OK");
+        #endif
+        mms.set_memory(phi);
+      } else {
+        phi = PhiNode::make(region, old_slice, Type::MEMORY, mms.adr_type(C));
+        _gvn.set_type(phi, Type::MEMORY);
+        phi->set_req(new_path, new_slice);
+        mms.set_memory(_gvn.transform(phi));  // assume it is complete
+      }
+    }
+  }
+}
+
+//------------------------------make_slow_call_ex------------------------------
+// Make the exception handler hookups for the slow call
+void GraphKit::make_slow_call_ex(Node* call, ciInstanceKlass* ex_klass, bool separate_io_proj) {
+  if (stopped())  return;
+
+  // Make a catch node with just two handlers:  fall-through and catch-all
+  Node* i_o  = _gvn.transform( new (C, 1) ProjNode(call, TypeFunc::I_O, separate_io_proj) );
+  Node* catc = _gvn.transform( new (C, 2) CatchNode(control(), i_o, 2) );
+  Node* norm = _gvn.transform( new (C, 1) CatchProjNode(catc, CatchProjNode::fall_through_index, CatchProjNode::no_handler_bci) );
+  Node* excp = _gvn.transform( new (C, 1) CatchProjNode(catc, CatchProjNode::catch_all_index,    CatchProjNode::no_handler_bci) );
+
+  { PreserveJVMState pjvms(this);
+    set_control(excp);
+    set_i_o(i_o);
+
+    if (excp != top()) {
+      // Create an exception state also.
+      // Use an exact type if the caller has specified a specific exception.
+      const Type* ex_type = TypeOopPtr::make_from_klass_unique(ex_klass)->cast_to_ptr_type(TypePtr::NotNull);
+      Node*       ex_oop  = new (C, 2) CreateExNode(ex_type, control(), i_o);
+      add_exception_state(make_exception_state(_gvn.transform(ex_oop)));
+    }
+  }
+
+  // Get the no-exception control from the CatchNode.
+  set_control(norm);
+}
+
+
+//-------------------------------gen_subtype_check-----------------------------
+// Generate a subtyping check.  Takes as input the subtype and supertype.
+// Returns 2 values: sets the default control() to the true path and returns
+// the false path.  Only reads invariant memory; sets no (visible) memory.
+// The PartialSubtypeCheckNode sets the hidden 1-word cache in the encoding
+// but that's not exposed to the optimizer.  This call also doesn't take in an
+// Object; if you wish to check an Object you need to load the Object's class
+// prior to coming here.
+Node* GraphKit::gen_subtype_check(Node* subklass, Node* superklass) {
+  // Fast check for identical types, perhaps identical constants.
+  // The types can even be identical non-constants, in cases
+  // involving Array.newInstance, Object.clone, etc.
+  if (subklass == superklass)
+    return top();             // false path is dead; no test needed.
+
+  if (_gvn.type(superklass)->singleton()) {
+    ciKlass* superk = _gvn.type(superklass)->is_klassptr()->klass();
+    ciKlass* subk   = _gvn.type(subklass)->is_klassptr()->klass();
+
+    // In the common case of an exact superklass, try to fold up the
+    // test before generating code.  You may ask, why not just generate
+    // the code and then let it fold up?  The answer is that the generated
+    // code will necessarily include null checks, which do not always
+    // completely fold away.  If they are also needless, then they turn
+    // into a performance loss.  Example:
+    //    Foo[] fa = blah(); Foo x = fa[0]; fa[1] = x;
+    // Here, the type of 'fa' is often exact, so the store check
+    // of fa[1]=x will fold up, without testing the nullness of x.
+    switch (static_subtype_check(superk, subk)) {
+    case SSC_always_false:
+      {
+        Node* always_fail = control();
+        set_control(top());
+        return always_fail;
+      }
+    case SSC_always_true:
+      return top();
+    case SSC_easy_test:
+      {
+        // Just do a direct pointer compare and be done.
+        Node* cmp = _gvn.transform( new(C, 3) CmpPNode(subklass, superklass) );
+        Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::eq) );
+        IfNode* iff = create_and_xform_if(control(), bol, PROB_STATIC_FREQUENT, COUNT_UNKNOWN);
+        set_control( _gvn.transform( new(C, 1) IfTrueNode (iff) ) );
+        return       _gvn.transform( new(C, 1) IfFalseNode(iff) );
+      }
+    case SSC_full_test:
+      break;
+    default:
+      ShouldNotReachHere();
+    }
+  }
+
+  // %%% Possible further optimization:  Even if the superklass is not exact,
+  // if the subklass is the unique subtype of the superklass, the check
+  // will always succeed.  We could leave a dependency behind to ensure this.
+
+  // First load the super-klass's check-offset
+  Node *p1 = basic_plus_adr( superklass, superklass, sizeof(oopDesc) + Klass::super_check_offset_offset_in_bytes() );
+  Node *chk_off = _gvn.transform( new (C, 3) LoadINode( NULL, memory(p1), p1, _gvn.type(p1)->is_ptr() ) );
+  int cacheoff_con = sizeof(oopDesc) + Klass::secondary_super_cache_offset_in_bytes();
+  bool might_be_cache = (find_int_con(chk_off, cacheoff_con) == cacheoff_con);
+
+  // Load from the sub-klass's super-class display list, or a 1-word cache of
+  // the secondary superclass list, or a failing value with a sentinel offset
+  // if the super-klass is an interface or exceptionally deep in the Java
+  // hierarchy and we have to scan the secondary superclass list the hard way.
+  // Worst-case type is a little odd: NULL is allowed as a result (usually
+  // klass loads can never produce a NULL).
+  Node *chk_off_X = ConvI2X(chk_off);
+  Node *p2 = _gvn.transform( new (C, 4) AddPNode(subklass,subklass,chk_off_X) );
+  // For some types like interfaces the following loadKlass is from a 1-word
+  // cache which is mutable so can't use immutable memory.  Other
+  // types load from the super-class display table which is immutable.
+  Node *kmem = might_be_cache ? memory(p2) : immutable_memory();
+  Node *nkls = _gvn.transform( new (C, 3) LoadKlassNode( NULL, kmem, p2, _gvn.type(p2)->is_ptr(), TypeKlassPtr::OBJECT_OR_NULL ) );
+
+  // Compile speed common case: ARE a subtype and we canNOT fail
+  if( superklass == nkls )
+    return top();             // false path is dead; no test needed.
+
+  // See if we get an immediate positive hit.  Happens roughly 83% of the
+  // time.  Test to see if the value loaded just previously from the subklass
+  // is exactly the superklass.
+  Node *cmp1 = _gvn.transform( new (C, 3) CmpPNode( superklass, nkls ) );
+  Node *bol1 = _gvn.transform( new (C, 2) BoolNode( cmp1, BoolTest::eq ) );
+  IfNode *iff1 = create_and_xform_if( control(), bol1, PROB_LIKELY(0.83f), COUNT_UNKNOWN );
+  Node *iftrue1 = _gvn.transform( new (C, 1) IfTrueNode ( iff1 ) );
+  set_control(    _gvn.transform( new (C, 1) IfFalseNode( iff1 ) ) );
+
+  // Compile speed common case: Check for being deterministic right now.  If
+  // chk_off is a constant and not equal to cacheoff then we are NOT a
+  // subklass.  In this case we need exactly the 1 test above and we can
+  // return those results immediately.
+  if (!might_be_cache) {
+    Node* not_subtype_ctrl = control();
+    set_control(iftrue1); // We need exactly the 1 test above
+    return not_subtype_ctrl;
+  }
+
+  // Gather the various success & failures here
+  RegionNode *r_ok_subtype = new (C, 4) RegionNode(4);
+  record_for_igvn(r_ok_subtype);
+  RegionNode *r_not_subtype = new (C, 3) RegionNode(3);
+  record_for_igvn(r_not_subtype);
+
+  r_ok_subtype->init_req(1, iftrue1);
+
+  // Check for immediate negative hit.  Happens roughly 11% of the time (which
+  // is roughly 63% of the remaining cases).  Test to see if the loaded
+  // check-offset points into the subklass display list or the 1-element
+  // cache.  If it points to the display (and NOT the cache) and the display
+  // missed then it's not a subtype.
+  Node *cacheoff = _gvn.intcon(cacheoff_con);
+  Node *cmp2 = _gvn.transform( new (C, 3) CmpINode( chk_off, cacheoff ) );
+  Node *bol2 = _gvn.transform( new (C, 2) BoolNode( cmp2, BoolTest::ne ) );
+  IfNode *iff2 = create_and_xform_if( control(), bol2, PROB_LIKELY(0.63f), COUNT_UNKNOWN );
+  r_not_subtype->init_req(1, _gvn.transform( new (C, 1) IfTrueNode (iff2) ) );
+  set_control(                _gvn.transform( new (C, 1) IfFalseNode(iff2) ) );
+
+  // Check for self.  Very rare to get here, but its taken 1/3 the time.
+  // No performance impact (too rare) but allows sharing of secondary arrays
+  // which has some footprint reduction.
+  Node *cmp3 = _gvn.transform( new (C, 3) CmpPNode( subklass, superklass ) );
+  Node *bol3 = _gvn.transform( new (C, 2) BoolNode( cmp3, BoolTest::eq ) );
+  IfNode *iff3 = create_and_xform_if( control(), bol3, PROB_LIKELY(0.36f), COUNT_UNKNOWN );
+  r_ok_subtype->init_req(2, _gvn.transform( new (C, 1) IfTrueNode ( iff3 ) ) );
+  set_control(               _gvn.transform( new (C, 1) IfFalseNode( iff3 ) ) );
+
+  // Now do a linear scan of the secondary super-klass array.  Again, no real
+  // performance impact (too rare) but it's gotta be done.
+  // (The stub also contains the self-check of subklass == superklass.
+  // Since the code is rarely used, there is no penalty for moving it
+  // out of line, and it can only improve I-cache density.)
+  Node* psc = _gvn.transform(
+    new (C, 3) PartialSubtypeCheckNode(control(), subklass, superklass) );
+
+  Node *cmp4 = _gvn.transform( new (C, 3) CmpPNode( psc, null() ) );
+  Node *bol4 = _gvn.transform( new (C, 2) BoolNode( cmp4, BoolTest::ne ) );
+  IfNode *iff4 = create_and_xform_if( control(), bol4, PROB_FAIR, COUNT_UNKNOWN );
+  r_not_subtype->init_req(2, _gvn.transform( new (C, 1) IfTrueNode (iff4) ) );
+  r_ok_subtype ->init_req(3, _gvn.transform( new (C, 1) IfFalseNode(iff4) ) );
+
+  // Return false path; set default control to true path.
+  set_control( _gvn.transform(r_ok_subtype) );
+  return _gvn.transform(r_not_subtype);
+}
+
+//----------------------------static_subtype_check-----------------------------
+// Shortcut important common cases when superklass is exact:
+// (0) superklass is java.lang.Object (can occur in reflective code)
+// (1) subklass is already limited to a subtype of superklass => always ok
+// (2) subklass does not overlap with superklass => always fail
+// (3) superklass has NO subtypes and we can check with a simple compare.
+int GraphKit::static_subtype_check(ciKlass* superk, ciKlass* subk) {
+  if (StressReflectiveCode) {
+    return SSC_full_test;       // Let caller generate the general case.
+  }
+
+  if (superk == env()->Object_klass()) {
+    return SSC_always_true;     // (0) this test cannot fail
+  }
+
+  ciType* superelem = superk;
+  if (superelem->is_array_klass())
+    superelem = superelem->as_array_klass()->base_element_type();
+
+  if (!subk->is_interface()) {  // cannot trust static interface types yet
+    if (subk->is_subtype_of(superk)) {
+      return SSC_always_true;   // (1) false path dead; no dynamic test needed
+    }
+    if (!(superelem->is_klass() && superelem->as_klass()->is_interface()) &&
+        !superk->is_subtype_of(subk)) {
+      return SSC_always_false;
+    }
+  }
+
+  // If casting to an instance klass, it must have no subtypes
+  if (superk->is_interface()) {
+    // Cannot trust interfaces yet.
+    // %%% S.B. superk->nof_implementors() == 1
+  } else if (superelem->is_instance_klass()) {
+    ciInstanceKlass* ik = superelem->as_instance_klass();
+    if (!ik->has_subklass() && !ik->is_interface()) {
+      if (!ik->is_final()) {
+        // Add a dependency if there is a chance of a later subclass.
+        C->dependencies()->assert_leaf_type(ik);
+      }
+      return SSC_easy_test;     // (3) caller can do a simple ptr comparison
+    }
+  } else {
+    // A primitive array type has no subtypes.
+    return SSC_easy_test;       // (3) caller can do a simple ptr comparison
+  }
+
+  return SSC_full_test;
+}
+
+// Profile-driven exact type check:
+Node* GraphKit::type_check_receiver(Node* receiver, ciKlass* klass,
+                                    float prob,
+                                    Node* *casted_receiver) {
+  const TypeKlassPtr* tklass = TypeKlassPtr::make(klass);
+  Node* recv_klass = load_object_klass(receiver);
+  Node* want_klass = makecon(tklass);
+  Node* cmp = _gvn.transform( new(C, 3) CmpPNode(recv_klass, want_klass) );
+  Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::eq) );
+  IfNode* iff = create_and_xform_if(control(), bol, prob, COUNT_UNKNOWN);
+  set_control( _gvn.transform( new(C, 1) IfTrueNode (iff) ));
+  Node* fail = _gvn.transform( new(C, 1) IfFalseNode(iff) );
+
+  const TypeOopPtr* recv_xtype = tklass->as_instance_type();
+  assert(recv_xtype->klass_is_exact(), "");
+
+  // Subsume downstream occurrences of receiver with a cast to
+  // recv_xtype, since now we know what the type will be.
+  Node* cast = new(C, 2) CheckCastPPNode(control(), receiver, recv_xtype);
+  (*casted_receiver) = _gvn.transform(cast);
+  // (User must make the replace_in_map call.)
+
+  return fail;
+}
+
+
+//-------------------------------gen_instanceof--------------------------------
+// Generate an instance-of idiom.  Used by both the instance-of bytecode
+// and the reflective instance-of call.
+Node* GraphKit::gen_instanceof( Node *subobj, Node* superklass ) {
+  C->set_has_split_ifs(true); // Has chance for split-if optimization
+  assert( !stopped(), "dead parse path should be checked in callers" );
+  assert(!TypePtr::NULL_PTR->higher_equal(_gvn.type(superklass)->is_klassptr()),
+         "must check for not-null not-dead klass in callers");
+
+  // Make the merge point
+  enum { _obj_path = 1, _fail_path, _null_path, PATH_LIMIT };
+  RegionNode* region = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT);
+  Node*       phi    = new(C, PATH_LIMIT) PhiNode(region, TypeInt::BOOL);
+  C->set_has_split_ifs(true); // Has chance for split-if optimization
+
+  // Null check; get casted pointer; set region slot 3
+  Node* null_ctl = top();
+  Node* not_null_obj = null_check_oop(subobj, &null_ctl);
+
+  // If not_null_obj is dead, only null-path is taken
+  if (stopped()) {              // Doing instance-of on a NULL?
+    set_control(null_ctl);
+    return intcon(0);
+  }
+  region->init_req(_null_path, null_ctl);
+  phi   ->init_req(_null_path, intcon(0)); // Set null path value
+
+  // Load the object's klass
+  Node* obj_klass = load_object_klass(not_null_obj);
+
+  // Generate the subtype check
+  Node* not_subtype_ctrl = gen_subtype_check(obj_klass, superklass);
+
+  // Plug in the success path to the general merge in slot 1.
+  region->init_req(_obj_path, control());
+  phi   ->init_req(_obj_path, intcon(1));
+
+  // Plug in the failing path to the general merge in slot 2.
+  region->init_req(_fail_path, not_subtype_ctrl);
+  phi   ->init_req(_fail_path, intcon(0));
+
+  // Return final merged results
+  set_control( _gvn.transform(region) );
+  record_for_igvn(region);
+  return _gvn.transform(phi);
+}
+
+//-------------------------------gen_checkcast---------------------------------
+// Generate a checkcast idiom.  Used by both the checkcast bytecode and the
+// array store bytecode.  Stack must be as-if BEFORE doing the bytecode so the
+// uncommon-trap paths work.  Adjust stack after this call.
+// If failure_control is supplied and not null, it is filled in with
+// the control edge for the cast failure.  Otherwise, an appropriate
+// uncommon trap or exception is thrown.
+Node* GraphKit::gen_checkcast(Node *obj, Node* superklass,
+                              Node* *failure_control) {
+  kill_dead_locals();           // Benefit all the uncommon traps
+  const TypeKlassPtr *tk = _gvn.type(superklass)->is_klassptr();
+  const Type *toop = TypeOopPtr::make_from_klass(tk->klass());
+
+  // Fast cutout:  Check the case that the cast is vacuously true.
+  // This detects the common cases where the test will short-circuit
+  // away completely.  We do this before we perform the null check,
+  // because if the test is going to turn into zero code, we don't
+  // want a residual null check left around.  (Causes a slowdown,
+  // for example, in some objArray manipulations, such as a[i]=a[j].)
+  if (tk->singleton()) {
+    const TypeOopPtr* objtp = _gvn.type(obj)->isa_oopptr();
+    if (objtp != NULL && objtp->klass() != NULL) {
+      switch (static_subtype_check(tk->klass(), objtp->klass())) {
+      case SSC_always_true:
+        return obj;
+      case SSC_always_false:
+        // It needs a null check because a null will *pass* the cast check.
+        // A non-null value will always produce an exception.
+        return do_null_assert(obj, T_OBJECT);
+      }
+    }
+  }
+
+  ciProfileData* data = NULL;
+  if (failure_control == NULL) {        // use MDO in regular case only
+    assert(java_bc() == Bytecodes::_aastore ||
+           java_bc() == Bytecodes::_checkcast,
+           "interpreter profiles type checks only for these BCs");
+    data = method()->method_data()->bci_to_data(bci());
+  }
+
+  // Make the merge point
+  enum { _obj_path = 1, _null_path, PATH_LIMIT };
+  RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT);
+  Node*       phi    = new (C, PATH_LIMIT) PhiNode(region, toop);
+  C->set_has_split_ifs(true); // Has chance for split-if optimization
+
+  // Use null-cast information if it is available
+  bool never_see_null = false;
+  // If we see an unexpected null at a check-cast we record it and force a
+  // recompile; the offending check-cast will be compiled to handle NULLs.
+  // If we see several offending BCIs, then all checkcasts in the
+  // method will be compiled to handle NULLs.
+  if (UncommonNullCast            // Cutout for this technique
+      && failure_control == NULL  // regular case
+      && obj != null()            // And not the -Xcomp stupid case?
+      && !too_many_traps(Deoptimization::Reason_null_check)) {
+    // Finally, check the "null_seen" bit from the interpreter.
+    if (data == NULL || !data->as_BitData()->null_seen()) {
+      never_see_null = true;
+    }
+  }
+
+  // Null check; get casted pointer; set region slot 3
+  Node* null_ctl = top();
+  Node* not_null_obj = null_check_oop(obj, &null_ctl, never_see_null);
+
+  // If not_null_obj is dead, only null-path is taken
+  if (stopped()) {              // Doing instance-of on a NULL?
+    set_control(null_ctl);
+    return null();
+  }
+  region->init_req(_null_path, null_ctl);
+  phi   ->init_req(_null_path, null());  // Set null path value
+
+  Node* cast_obj = NULL;        // the casted version of the object
+
+  // If the profile has seen exactly one type, narrow to that type.
+  // (The subsequent subtype check will always fold up.)
+  if (UseTypeProfile && TypeProfileCasts && data != NULL &&
+      // Counter has never been decremented (due to cast failure).
+      // ...This is a reasonable thing to expect.  It is true of
+      // all casts inserted by javac to implement generic types.
+      data->as_CounterData()->count() >= 0 &&
+      !too_many_traps(Deoptimization::Reason_class_check)) {
+    // (No, this isn't a call, but it's enough like a virtual call
+    // to use the same ciMethod accessor to get the profile info...)
+    ciCallProfile profile = method()->call_profile_at_bci(bci());
+    if (profile.count() >= 0 &&         // no cast failures here
+        profile.has_receiver(0) &&
+        profile.morphism() == 1) {
+      ciKlass* exact_kls = profile.receiver(0);
+      int ssc = static_subtype_check(tk->klass(), exact_kls);
+      if (ssc == SSC_always_true) {
+        // If we narrow the type to match what the type profile sees,
+        // we can then remove the rest of the cast.
+        // This is a win, even if the exact_kls is very specific,
+        // because downstream operations, such as method calls,
+        // will often benefit from the sharper type.
+        Node* exact_obj = not_null_obj; // will get updated in place...
+        Node* slow_ctl  = type_check_receiver(exact_obj, exact_kls, 1.0,
+                                              &exact_obj);
+        { PreserveJVMState pjvms(this);
+          set_control(slow_ctl);
+          uncommon_trap(Deoptimization::Reason_class_check,
+                        Deoptimization::Action_maybe_recompile);
+        }
+        if (failure_control != NULL) // failure is now impossible
+          (*failure_control) = top();
+        replace_in_map(not_null_obj, exact_obj);
+        // adjust the type of the phi to the exact klass:
+        phi->raise_bottom_type(_gvn.type(exact_obj)->meet(TypePtr::NULL_PTR));
+        cast_obj = exact_obj;
+      }
+      // assert(cast_obj != NULL)... except maybe the profile lied to us.
+    }
+  }
+
+  if (cast_obj == NULL) {
+    // Load the object's klass
+    Node* obj_klass = load_object_klass(not_null_obj);
+
+    // Generate the subtype check
+    Node* not_subtype_ctrl = gen_subtype_check( obj_klass, superklass );
+
+    // Plug in success path into the merge
+    cast_obj = _gvn.transform(new (C, 2) CheckCastPPNode(control(),
+                                                         not_null_obj, toop));
+    // Failure path ends in uncommon trap (or may be dead - failure impossible)
+    if (failure_control == NULL) {
+      if (not_subtype_ctrl != top()) { // If failure is possible
+        PreserveJVMState pjvms(this);
+        set_control(not_subtype_ctrl);
+        builtin_throw(Deoptimization::Reason_class_check, obj_klass);
+      }
+    } else {
+      (*failure_control) = not_subtype_ctrl;
+    }
+  }
+
+  region->init_req(_obj_path, control());
+  phi   ->init_req(_obj_path, cast_obj);
+
+  // A merge of NULL or Casted-NotNull obj
+  Node* res = _gvn.transform(phi);
+
+  // Note I do NOT always 'replace_in_map(obj,result)' here.
+  //  if( tk->klass()->can_be_primary_super()  )
+    // This means that if I successfully store an Object into an array-of-String
+    // I 'forget' that the Object is really now known to be a String.  I have to
+    // do this because we don't have true union types for interfaces - if I store
+    // a Baz into an array-of-Interface and then tell the optimizer it's an
+    // Interface, I forget that it's also a Baz and cannot do Baz-like field
+    // references to it.  FIX THIS WHEN UNION TYPES APPEAR!
+  //  replace_in_map( obj, res );
+
+  // Return final merged results
+  set_control( _gvn.transform(region) );
+  record_for_igvn(region);
+  return res;
+}
+
+//------------------------------next_monitor-----------------------------------
+// What number should be given to the next monitor?
+int GraphKit::next_monitor() {
+  int current = jvms()->monitor_depth()* C->sync_stack_slots();
+  int next = current + C->sync_stack_slots();
+  // Keep the toplevel high water mark current:
+  if (C->fixed_slots() < next)  C->set_fixed_slots(next);
+  return current;
+}
+
+//------------------------------insert_mem_bar---------------------------------
+// Memory barrier to avoid floating things around
+// The membar serves as a pinch point between both control and all memory slices.
+Node* GraphKit::insert_mem_bar(int opcode, Node* precedent) {
+  MemBarNode* mb = MemBarNode::make(C, opcode, Compile::AliasIdxBot, precedent);
+  mb->init_req(TypeFunc::Control, control());
+  mb->init_req(TypeFunc::Memory,  reset_memory());
+  Node* membar = _gvn.transform(mb);
+  set_control(_gvn.transform(new (C, 1) ProjNode(membar,TypeFunc::Control) ));
+  set_all_memory_call(membar);
+  return membar;
+}
+
+//-------------------------insert_mem_bar_volatile----------------------------
+// Memory barrier to avoid floating things around
+// The membar serves as a pinch point between both control and memory(alias_idx).
+// If you want to make a pinch point on all memory slices, do not use this
+// function (even with AliasIdxBot); use insert_mem_bar() instead.
+Node* GraphKit::insert_mem_bar_volatile(int opcode, int alias_idx, Node* precedent) {
+  // When Parse::do_put_xxx updates a volatile field, it appends a series
+  // of MemBarVolatile nodes, one for *each* volatile field alias category.
+  // The first membar is on the same memory slice as the field store opcode.
+  // This forces the membar to follow the store.  (Bug 6500685 broke this.)
+  // All the other membars (for other volatile slices, including AliasIdxBot,
+  // which stands for all unknown volatile slices) are control-dependent
+  // on the first membar.  This prevents later volatile loads or stores
+  // from sliding up past the just-emitted store.
+
+  MemBarNode* mb = MemBarNode::make(C, opcode, alias_idx, precedent);
+  mb->set_req(TypeFunc::Control,control());
+  if (alias_idx == Compile::AliasIdxBot) {
+    mb->set_req(TypeFunc::Memory, merged_memory()->base_memory());
+  } else {
+    assert(!(opcode == Op_Initialize && alias_idx != Compile::AliasIdxRaw), "fix caller");
+    mb->set_req(TypeFunc::Memory, memory(alias_idx));
+  }
+  Node* membar = _gvn.transform(mb);
+  set_control(_gvn.transform(new (C, 1) ProjNode(membar, TypeFunc::Control)));
+  if (alias_idx == Compile::AliasIdxBot) {
+    merged_memory()->set_base_memory(_gvn.transform(new (C, 1) ProjNode(membar, TypeFunc::Memory)));
+  } else {
+    set_memory(_gvn.transform(new (C, 1) ProjNode(membar, TypeFunc::Memory)),alias_idx);
+  }
+  return membar;
+}
+
+//------------------------------shared_lock------------------------------------
+// Emit locking code.
+FastLockNode* GraphKit::shared_lock(Node* obj) {
+  // bci is either a monitorenter bc or InvocationEntryBci
+  // %%% SynchronizationEntryBCI is redundant; use InvocationEntryBci in interfaces
+  assert(SynchronizationEntryBCI == InvocationEntryBci, "");
+
+  if( !GenerateSynchronizationCode )
+    return NULL;                // Not locking things?
+  if (stopped())                // Dead monitor?
+    return NULL;
+
+  assert(dead_locals_are_killed(), "should kill locals before sync. point");
+
+  // Box the stack location
+  Node* box = _gvn.transform(new (C, 1) BoxLockNode(next_monitor()));
+  Node* mem = reset_memory();
+
+  FastLockNode * flock = _gvn.transform(new (C, 3) FastLockNode(0, obj, box) )->as_FastLock();
+  if (PrintPreciseBiasedLockingStatistics) {
+    // Create the counters for this fast lock.
+    flock->create_lock_counter(sync_jvms()); // sync_jvms used to get current bci
+  }
+  // Add monitor to debug info for the slow path.  If we block inside the
+  // slow path and de-opt, we need the monitor hanging around
+  map()->push_monitor( flock );
+
+  const TypeFunc *tf = LockNode::lock_type();
+  LockNode *lock = new (C, tf->domain()->cnt()) LockNode(C, tf);
+
+  lock->init_req( TypeFunc::Control, control() );
+  lock->init_req( TypeFunc::Memory , mem );
+  lock->init_req( TypeFunc::I_O    , top() )     ;   // does no i/o
+  lock->init_req( TypeFunc::FramePtr, frameptr() );
+  lock->init_req( TypeFunc::ReturnAdr, top() );
+
+  lock->init_req(TypeFunc::Parms + 0, obj);
+  lock->init_req(TypeFunc::Parms + 1, box);
+  lock->init_req(TypeFunc::Parms + 2, flock);
+  add_safepoint_edges(lock);
+
+  lock = _gvn.transform( lock )->as_Lock();
+
+  // lock has no side-effects, sets few values
+  set_predefined_output_for_runtime_call(lock, mem, TypeRawPtr::BOTTOM);
+
+  insert_mem_bar(Op_MemBarAcquire);
+
+  // Add this to the worklist so that the lock can be eliminated
+  record_for_igvn(lock);
+
+#ifndef PRODUCT
+  if (PrintLockStatistics) {
+    // Update the counter for this lock.  Don't bother using an atomic
+    // operation since we don't require absolute accuracy.
+    lock->create_lock_counter(map()->jvms());
+    int adr_type = Compile::AliasIdxRaw;
+    Node* counter_addr = makecon(TypeRawPtr::make(lock->counter()->addr()));
+    Node* cnt  = make_load(NULL, counter_addr, TypeInt::INT, T_INT, adr_type);
+    Node* incr = _gvn.transform(new (C, 3) AddINode(cnt, _gvn.intcon(1)));
+    store_to_memory(control(), counter_addr, incr, T_INT, adr_type);
+  }
+#endif
+
+  return flock;
+}
+
+
+//------------------------------shared_unlock----------------------------------
+// Emit unlocking code.
+void GraphKit::shared_unlock(Node* box, Node* obj) {
+  // bci is either a monitorenter bc or InvocationEntryBci
+  // %%% SynchronizationEntryBCI is redundant; use InvocationEntryBci in interfaces
+  assert(SynchronizationEntryBCI == InvocationEntryBci, "");
+
+  if( !GenerateSynchronizationCode )
+    return;
+  if (stopped()) {               // Dead monitor?
+    map()->pop_monitor();        // Kill monitor from debug info
+    return;
+  }
+
+  // Memory barrier to avoid floating things down past the locked region
+  insert_mem_bar(Op_MemBarRelease);
+
+  const TypeFunc *tf = OptoRuntime::complete_monitor_exit_Type();
+  UnlockNode *unlock = new (C, tf->domain()->cnt()) UnlockNode(C, tf);
+  uint raw_idx = Compile::AliasIdxRaw;
+  unlock->init_req( TypeFunc::Control, control() );
+  unlock->init_req( TypeFunc::Memory , memory(raw_idx) );
+  unlock->init_req( TypeFunc::I_O    , top() )     ;   // does no i/o
+  unlock->init_req( TypeFunc::FramePtr, frameptr() );
+  unlock->init_req( TypeFunc::ReturnAdr, top() );
+
+  unlock->init_req(TypeFunc::Parms + 0, obj);
+  unlock->init_req(TypeFunc::Parms + 1, box);
+  unlock = _gvn.transform(unlock)->as_Unlock();
+
+  Node* mem = reset_memory();
+
+  // unlock has no side-effects, sets few values
+  set_predefined_output_for_runtime_call(unlock, mem, TypeRawPtr::BOTTOM);
+
+  // Kill monitor from debug info
+  map()->pop_monitor( );
+}
+
+//-------------------------------get_layout_helper-----------------------------
+// If the given klass is a constant or known to be an array,
+// fetch the constant layout helper value into constant_value
+// and return (Node*)NULL.  Otherwise, load the non-constant
+// layout helper value, and return the node which represents it.
+// This two-faced routine is useful because allocation sites
+// almost always feature constant types.
+Node* GraphKit::get_layout_helper(Node* klass_node, jint& constant_value) {
+  const TypeKlassPtr* inst_klass = _gvn.type(klass_node)->isa_klassptr();
+  if (!StressReflectiveCode && inst_klass != NULL) {
+    ciKlass* klass = inst_klass->klass();
+    bool    xklass = inst_klass->klass_is_exact();
+    if (xklass || klass->is_array_klass()) {
+      jint lhelper = klass->layout_helper();
+      if (lhelper != Klass::_lh_neutral_value) {
+        constant_value = lhelper;
+        return (Node*) NULL;
+      }
+    }
+  }
+  constant_value = Klass::_lh_neutral_value;  // put in a known value
+  Node* lhp = basic_plus_adr(klass_node, klass_node, Klass::layout_helper_offset_in_bytes() + sizeof(oopDesc));
+  return make_load(NULL, lhp, TypeInt::INT, T_INT);
+}
+
+// We just put in an allocate/initialize with a big raw-memory effect.
+// Hook selected additional alias categories on the initialization.
+static void hook_memory_on_init(GraphKit& kit, int alias_idx,
+                                MergeMemNode* init_in_merge,
+                                Node* init_out_raw) {
+  DEBUG_ONLY(Node* init_in_raw = init_in_merge->base_memory());
+  assert(init_in_merge->memory_at(alias_idx) == init_in_raw, "");
+
+  Node* prevmem = kit.memory(alias_idx);
+  init_in_merge->set_memory_at(alias_idx, prevmem);
+  kit.set_memory(init_out_raw, alias_idx);
+}
+
+//---------------------------set_output_for_allocation-------------------------
+Node* GraphKit::set_output_for_allocation(AllocateNode* alloc,
+                                          const TypeOopPtr* oop_type,
+                                          bool raw_mem_only) {
+  int rawidx = Compile::AliasIdxRaw;
+  alloc->set_req( TypeFunc::FramePtr, frameptr() );
+  add_safepoint_edges(alloc);
+  Node* allocx = _gvn.transform(alloc);
+  set_control( _gvn.transform(new (C, 1) ProjNode(allocx, TypeFunc::Control) ) );
+  // create memory projection for i_o
+  set_memory ( _gvn.transform( new (C, 1) ProjNode(allocx, TypeFunc::Memory, true) ), rawidx );
+  make_slow_call_ex(allocx, env()->OutOfMemoryError_klass(), true);
+
+  // create a memory projection as for the normal control path
+  Node* malloc = _gvn.transform(new (C, 1) ProjNode(allocx, TypeFunc::Memory));
+  set_memory(malloc, rawidx);
+
+  // a normal slow-call doesn't change i_o, but an allocation does
+  // we create a separate i_o projection for the normal control path
+  set_i_o(_gvn.transform( new (C, 1) ProjNode(allocx, TypeFunc::I_O, false) ) );
+  Node* rawoop = _gvn.transform( new (C, 1) ProjNode(allocx, TypeFunc::Parms) );
+
+  // put in an initialization barrier
+  InitializeNode* init = insert_mem_bar_volatile(Op_Initialize, rawidx,
+                                                 rawoop)->as_Initialize();
+  assert(alloc->initialization() == init,  "2-way macro link must work");
+  assert(init ->allocation()     == alloc, "2-way macro link must work");
+  if (ReduceFieldZeroing && !raw_mem_only) {
+    // Extract memory strands which may participate in the new object's
+    // initialization, and source them from the new InitializeNode.
+    // This will allow us to observe initializations when they occur,
+    // and link them properly (as a group) to the InitializeNode.
+    Node* klass_node = alloc->in(AllocateNode::KlassNode);
+    assert(init->in(InitializeNode::Memory) == malloc, "");
+    MergeMemNode* minit_in = MergeMemNode::make(C, malloc);
+    init->set_req(InitializeNode::Memory, minit_in);
+    record_for_igvn(minit_in); // fold it up later, if possible
+    Node* minit_out = memory(rawidx);
+    assert(minit_out->is_Proj() && minit_out->in(0) == init, "");
+    if (oop_type->isa_aryptr()) {
+      const TypePtr* telemref = oop_type->add_offset(Type::OffsetBot);
+      int            elemidx  = C->get_alias_index(telemref);
+      hook_memory_on_init(*this, elemidx, minit_in, minit_out);
+    } else if (oop_type->isa_instptr()) {
+      ciInstanceKlass* ik = oop_type->klass()->as_instance_klass();
+      for (int i = 0, len = ik->nof_nonstatic_fields(); i < len; i++) {
+        ciField* field = ik->nonstatic_field_at(i);
+        if (field->offset() >= TrackedInitializationLimit)
+          continue;  // do not bother to track really large numbers of fields
+        // Find (or create) the alias category for this field:
+        int fieldidx = C->alias_type(field)->index();
+        hook_memory_on_init(*this, fieldidx, minit_in, minit_out);
+      }
+    }
+  }
+
+  // Cast raw oop to the real thing...
+  Node* javaoop = new (C, 2) CheckCastPPNode(control(), rawoop, oop_type);
+  javaoop = _gvn.transform(javaoop);
+  C->set_recent_alloc(control(), javaoop);
+  assert(just_allocated_object(control()) == javaoop, "just allocated");
+
+#ifdef ASSERT
+  { // Verify that the AllocateNode::Ideal_foo recognizers work:
+    Node* kn = alloc->in(AllocateNode::KlassNode);
+    Node* ln = alloc->in(AllocateNode::ALength);
+    assert(AllocateNode::Ideal_klass(rawoop, &_gvn) == kn,
+           "Ideal_klass works");
+    assert(AllocateNode::Ideal_klass(javaoop, &_gvn) == kn,
+           "Ideal_klass works");
+    if (alloc->is_AllocateArray()) {
+      assert(AllocateArrayNode::Ideal_length(rawoop, &_gvn) == ln,
+             "Ideal_length works");
+      assert(AllocateArrayNode::Ideal_length(javaoop, &_gvn) == ln,
+             "Ideal_length works");
+    } else {
+      assert(ln->is_top(), "no length, please");
+    }
+  }
+#endif //ASSERT
+
+  return javaoop;
+}
+
+//---------------------------new_instance--------------------------------------
+// This routine takes a klass_node which may be constant (for a static type)
+// or may be non-constant (for reflective code).  It will work equally well
+// for either, and the graph will fold nicely if the optimizer later reduces
+// the type to a constant.
+// The optional arguments are for specialized use by intrinsics:
+//  - If 'extra_slow_test' if not null is an extra condition for the slow-path.
+//  - If 'raw_mem_only', do not cast the result to an oop.
+//  - If 'return_size_val', report the the total object size to the caller.
+Node* GraphKit::new_instance(Node* klass_node,
+                             Node* extra_slow_test,
+                             bool raw_mem_only, // affect only raw memory
+                             Node* *return_size_val) {
+  // Compute size in doublewords
+  // The size is always an integral number of doublewords, represented
+  // as a positive bytewise size stored in the klass's layout_helper.
+  // The layout_helper also encodes (in a low bit) the need for a slow path.
+  jint  layout_con = Klass::_lh_neutral_value;
+  Node* layout_val = get_layout_helper(klass_node, layout_con);
+  int   layout_is_con = (layout_val == NULL);
+
+  if (extra_slow_test == NULL)  extra_slow_test = intcon(0);
+  // Generate the initial go-slow test.  It's either ALWAYS (return a
+  // Node for 1) or NEVER (return a NULL) or perhaps (in the reflective
+  // case) a computed value derived from the layout_helper.
+  Node* initial_slow_test = NULL;
+  if (layout_is_con) {
+    assert(!StressReflectiveCode, "stress mode does not use these paths");
+    bool must_go_slow = Klass::layout_helper_needs_slow_path(layout_con);
+    initial_slow_test = must_go_slow? intcon(1): extra_slow_test;
+
+  } else {   // reflective case
+    // This reflective path is used by Unsafe.allocateInstance.
+    // (It may be stress-tested by specifying StressReflectiveCode.)
+    // Basically, we want to get into the VM is there's an illegal argument.
+    Node* bit = intcon(Klass::_lh_instance_slow_path_bit);
+    initial_slow_test = _gvn.transform( new (C, 3) AndINode(layout_val, bit) );
+    if (extra_slow_test != intcon(0)) {
+      initial_slow_test = _gvn.transform( new (C, 3) OrINode(initial_slow_test, extra_slow_test) );
+    }
+    // (Macro-expander will further convert this to a Bool, if necessary.)
+  }
+
+  // Find the size in bytes.  This is easy; it's the layout_helper.
+  // The size value must be valid even if the slow path is taken.
+  Node* size = NULL;
+  if (layout_is_con) {
+    size = MakeConX(Klass::layout_helper_size_in_bytes(layout_con));
+  } else {   // reflective case
+    // This reflective path is used by clone and Unsafe.allocateInstance.
+    size = ConvI2X(layout_val);
+
+    // Clear the low bits to extract layout_helper_size_in_bytes:
+    assert((int)Klass::_lh_instance_slow_path_bit < BytesPerLong, "clear bit");
+    Node* mask = MakeConX(~ (intptr_t)right_n_bits(LogBytesPerLong));
+    size = _gvn.transform( new (C, 3) AndXNode(size, mask) );
+  }
+  if (return_size_val != NULL) {
+    (*return_size_val) = size;
+  }
+
+  // This is a precise notnull oop of the klass.
+  // (Actually, it need not be precise if this is a reflective allocation.)
+  // It's what we cast the result to.
+  const TypeKlassPtr* tklass = _gvn.type(klass_node)->isa_klassptr();
+  if (!tklass)  tklass = TypeKlassPtr::OBJECT;
+  const TypeOopPtr* oop_type = tklass->as_instance_type();
+
+  // Now generate allocation code
+  AllocateNode* alloc
+    = new (C, AllocateNode::ParmLimit)
+        AllocateNode(C, AllocateNode::alloc_type(),
+                     control(), memory(Compile::AliasIdxRaw), i_o(),
+                     size, klass_node,
+                     initial_slow_test);
+
+  return set_output_for_allocation(alloc, oop_type, raw_mem_only);
+}
+
+//-------------------------------new_array-------------------------------------
+// helper for both newarray and anewarray
+// The 'length' parameter is (obviously) the length of the array.
+// See comments on new_instance for the meaning of the other arguments.
+Node* GraphKit::new_array(Node* klass_node,     // array klass (maybe variable)
+                          Node* length,         // number of array elements
+                          bool raw_mem_only,    // affect only raw memory
+                          Node* *return_size_val) {
+  jint  layout_con = Klass::_lh_neutral_value;
+  Node* layout_val = get_layout_helper(klass_node, layout_con);
+  int   layout_is_con = (layout_val == NULL);
+
+  if (!layout_is_con && !StressReflectiveCode &&
+      !too_many_traps(Deoptimization::Reason_class_check)) {
+    // This is a reflective array creation site.
+    // Optimistically assume that it is a subtype of Object[],
+    // so that we can fold up all the address arithmetic.
+    layout_con = Klass::array_layout_helper(T_OBJECT);
+    Node* cmp_lh = _gvn.transform( new(C, 3) CmpINode(layout_val, intcon(layout_con)) );
+    Node* bol_lh = _gvn.transform( new(C, 2) BoolNode(cmp_lh, BoolTest::eq) );
+    { BuildCutout unless(this, bol_lh, PROB_MAX);
+      uncommon_trap(Deoptimization::Reason_class_check,
+                    Deoptimization::Action_maybe_recompile);
+    }
+    layout_val = NULL;
+    layout_is_con = true;
+  }
+
+  // Generate the initial go-slow test.  Make sure we do not overflow
+  // if length is huge (near 2Gig) or negative!  We do not need
+  // exact double-words here, just a close approximation of needed
+  // double-words.  We can't add any offset or rounding bits, lest we
+  // take a size -1 of bytes and make it positive.  Use an unsigned
+  // compare, so negative sizes look hugely positive.
+  int fast_size_limit = FastAllocateSizeLimit;
+  if (layout_is_con) {
+    assert(!StressReflectiveCode, "stress mode does not use these paths");
+    // Increase the size limit if we have exact knowledge of array type.
+    int log2_esize = Klass::layout_helper_log2_element_size(layout_con);
+    fast_size_limit <<= (LogBytesPerLong - log2_esize);
+  }
+
+  Node* initial_slow_cmp  = _gvn.transform( new (C, 3) CmpUNode( length, intcon( fast_size_limit ) ) );
+  Node* initial_slow_test = _gvn.transform( new (C, 2) BoolNode( initial_slow_cmp, BoolTest::gt ) );
+  if (initial_slow_test->is_Bool()) {
+    // Hide it behind a CMoveI, or else PhaseIdealLoop::split_up will get sick.
+    initial_slow_test = initial_slow_test->as_Bool()->as_int_value(&_gvn);
+  }
+
+  // --- Size Computation ---
+  // array_size = round_to_heap(array_header + (length << elem_shift));
+  // where round_to_heap(x) == round_to(x, MinObjAlignmentInBytes)
+  // and round_to(x, y) == ((x + y-1) & ~(y-1))
+  // The rounding mask is strength-reduced, if possible.
+  int round_mask = MinObjAlignmentInBytes - 1;
+  Node* header_size = NULL;
+  int   header_size_min  = arrayOopDesc::base_offset_in_bytes(T_BYTE);
+  // (T_BYTE has the weakest alignment and size restrictions...)
+  if (layout_is_con) {
+    int       hsize  = Klass::layout_helper_header_size(layout_con);
+    int       eshift = Klass::layout_helper_log2_element_size(layout_con);
+    BasicType etype  = Klass::layout_helper_element_type(layout_con);
+    if ((round_mask & ~right_n_bits(eshift)) == 0)
+      round_mask = 0;  // strength-reduce it if it goes away completely
+    assert((hsize & right_n_bits(eshift)) == 0, "hsize is pre-rounded");
+    assert(header_size_min <= hsize, "generic minimum is smallest");
+    header_size_min = hsize;
+    header_size = intcon(hsize + round_mask);
+  } else {
+    Node* hss   = intcon(Klass::_lh_header_size_shift);
+    Node* hsm   = intcon(Klass::_lh_header_size_mask);
+    Node* hsize = _gvn.transform( new(C, 3) URShiftINode(layout_val, hss) );
+    hsize       = _gvn.transform( new(C, 3) AndINode(hsize, hsm) );
+    Node* mask  = intcon(round_mask);
+    header_size = _gvn.transform( new(C, 3) AddINode(hsize, mask) );
+  }
+
+  Node* elem_shift = NULL;
+  if (layout_is_con) {
+    int eshift = Klass::layout_helper_log2_element_size(layout_con);
+    if (eshift != 0)
+      elem_shift = intcon(eshift);
+  } else {
+    // There is no need to mask or shift this value.
+    // The semantics of LShiftINode include an implicit mask to 0x1F.
+    assert(Klass::_lh_log2_element_size_shift == 0, "use shift in place");
+    elem_shift = layout_val;
+  }
+
+  // Transition to native address size for all offset calculations:
+  Node* lengthx = ConvI2X(length);
+  Node* headerx = ConvI2X(header_size);
+#ifdef _LP64
+  { const TypeLong* tllen = _gvn.find_long_type(lengthx);
+    if (tllen != NULL && tllen->_lo < 0) {
+      // Add a manual constraint to a positive range.  Cf. array_element_address.
+      jlong size_max = arrayOopDesc::max_array_length(T_BYTE);
+      if (size_max > tllen->_hi)  size_max = tllen->_hi;
+      const TypeLong* tlcon = TypeLong::make(CONST64(0), size_max, Type::WidenMin);
+      lengthx = _gvn.transform( new (C, 2) ConvI2LNode(length, tlcon));
+    }
+  }
+#endif
+
+  // Combine header size (plus rounding) and body size.  Then round down.
+  // This computation cannot overflow, because it is used only in two
+  // places, one where the length is sharply limited, and the other
+  // after a successful allocation.
+  Node* abody = lengthx;
+  if (elem_shift != NULL)
+    abody     = _gvn.transform( new(C, 3) LShiftXNode(lengthx, elem_shift) );
+  Node* size  = _gvn.transform( new(C, 3) AddXNode(headerx, abody) );
+  if (round_mask != 0) {
+    Node* mask = MakeConX(~round_mask);
+    size       = _gvn.transform( new(C, 3) AndXNode(size, mask) );
+  }
+  // else if round_mask == 0, the size computation is self-rounding
+
+  if (return_size_val != NULL) {
+    // This is the size
+    (*return_size_val) = size;
+  }
+
+  // Now generate allocation code
+  // Create the AllocateArrayNode and its result projections
+  AllocateArrayNode* alloc
+    = new (C, AllocateArrayNode::ParmLimit)
+        AllocateArrayNode(C, AllocateArrayNode::alloc_type(),
+                          control(), memory(Compile::AliasIdxRaw), i_o(),
+                          size, klass_node,
+                          initial_slow_test,
+                          length);
+
+  // Cast to correct type.  Note that the klass_node may be constant or not,
+  // and in the latter case the actual array type will be inexact also.
+  // (This happens via a non-constant argument to inline_native_newArray.)
+  // In any case, the value of klass_node provides the desired array type.
+  const TypeInt* length_type = _gvn.find_int_type(length);
+  const TypeInt* narrow_length_type = NULL;
+  const TypeOopPtr* ary_type = _gvn.type(klass_node)->is_klassptr()->as_instance_type();
+  if (ary_type->isa_aryptr() && length_type != NULL) {
+    // Try to get a better type than POS for the size
+    ary_type = ary_type->is_aryptr()->cast_to_size(length_type);
+    narrow_length_type = ary_type->is_aryptr()->size();
+    if (narrow_length_type == length_type)
+      narrow_length_type = NULL;
+  }
+
+  Node* javaoop = set_output_for_allocation(alloc, ary_type, raw_mem_only);
+
+  // Cast length on remaining path to be positive:
+  if (narrow_length_type != NULL) {
+    Node* ccast = new (C, 2) CastIINode(length, narrow_length_type);
+    ccast->set_req(0, control());
+    _gvn.set_type_bottom(ccast);
+    record_for_igvn(ccast);
+    if (map()->find_edge(length) >= 0) {
+      replace_in_map(length, ccast);
+    }
+  }
+
+  return javaoop;
+}
+
+// The following "Ideal_foo" functions are placed here because they recognize
+// the graph shapes created by the functions immediately above.
+
+//---------------------------Ideal_allocation----------------------------------
+// Given an oop pointer or raw pointer, see if it feeds from an AllocateNode.
+AllocateNode* AllocateNode::Ideal_allocation(Node* ptr, PhaseTransform* phase) {
+  if (ptr == NULL) {     // reduce dumb test in callers
+    return NULL;
+  }
+  if (ptr->is_CheckCastPP()) {  // strip a raw-to-oop cast
+    ptr = ptr->in(1);
+    if (ptr == NULL)  return NULL;
+  }
+  if (ptr->is_Proj()) {
+    Node* allo = ptr->in(0);
+    if (allo != NULL && allo->is_Allocate()) {
+      return allo->as_Allocate();
+    }
+  }
+  // Report failure to match.
+  return NULL;
+}
+
+// Fancy version which also strips off an offset (and reports it to caller).
+AllocateNode* AllocateNode::Ideal_allocation(Node* ptr, PhaseTransform* phase,
+                                             intptr_t& offset) {
+  Node* base = AddPNode::Ideal_base_and_offset(ptr, phase, offset);
+  if (base == NULL)  return NULL;
+  return Ideal_allocation(base, phase);
+}
+
+// Trace Initialize <- Proj[Parm] <- Allocate
+AllocateNode* InitializeNode::allocation() {
+  Node* rawoop = in(InitializeNode::RawAddress);
+  if (rawoop->is_Proj()) {
+    Node* alloc = rawoop->in(0);
+    if (alloc->is_Allocate()) {
+      return alloc->as_Allocate();
+    }
+  }
+  return NULL;
+}
+
+// Trace Allocate -> Proj[Parm] -> Initialize
+InitializeNode* AllocateNode::initialization() {
+  ProjNode* rawoop = proj_out(AllocateNode::RawAddress);
+  if (rawoop == NULL)  return NULL;
+  for (DUIterator_Fast imax, i = rawoop->fast_outs(imax); i < imax; i++) {
+    Node* init = rawoop->fast_out(i);
+    if (init->is_Initialize()) {
+      assert(init->as_Initialize()->allocation() == this, "2-way link");
+      return init->as_Initialize();
+    }
+  }
+  return NULL;
+}