jdk8-mips64-public/hotspot: src/share/vm/opto/replacednodes.hpp@fc2c88ea11a9 (annotated)

src/share/vm/opto/replacednodes.hpp@fc2c88ea11a9 (annotated)

src/share/vm/opto/replacednodes.hpp

Fri, 11 Jul 2014 19:51:36 -0400

author: drchase
date: Fri, 11 Jul 2014 19:51:36 -0400
changeset 7161: fc2c88ea11a9
parent 7041: 411e30e5fbb8
child 8723: 9f5da1a1724c
permissions: -rw-r--r--

8036588: VerifyFieldClosure fails instanceKlass:3133
Summary: Changed deopt live-pointer test to use returns-object instead of live-and-returns-object
Reviewed-by: iveresov, kvn, jrose

 /*
  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_OPTO_REPLACEDNODES_HPP
 #define SHARE_VM_OPTO_REPLACEDNODES_HPP
 #include "opto/connode.hpp"
 // During parsing, when a node is "improved",
 // GraphKit::replace_in_map() is called to update the current map so
 // that the improved node is used from that point
 // on. GraphKit::replace_in_map() doesn't operate on the callers maps
 // and so some optimization opportunities may be lost. The
 // ReplacedNodes class addresses that problem.
 //
 // A ReplacedNodes object is a list of pair of nodes. Every
 // SafePointNode carries a ReplacedNodes object. Every time
 // GraphKit::replace_in_map() is called, a new pair of nodes is pushed
 // on the list of replaced nodes. When control flow paths merge, their
 // replaced nodes are also merged. When parsing exits a method to
 // return to a caller, the replaced nodes on the exit path are used to
 // update the caller's map.
 class ReplacedNodes VALUE_OBJ_CLASS_SPEC {
  private:
   class ReplacedNode VALUE_OBJ_CLASS_SPEC {
   private:
     Node* _initial;
     Node* _improved;
   public:
     ReplacedNode() : _initial(NULL), _improved(NULL) {}
     ReplacedNode(Node* initial, Node* improved) : _initial(initial), _improved(improved) {}
     Node* initial() const  { return _initial; }
     Node* improved() const { return _improved; }
     bool operator==(const ReplacedNode& other) {
       return _initial == other._initial && _improved == other._improved;
     }
   };
   GrowableArray<ReplacedNode>* _replaced_nodes;
   void allocate_if_necessary();
   bool has_node(const ReplacedNode& r) const;
   bool has_target_node(Node* n) const;
  public:
   ReplacedNodes()
     : _replaced_nodes(NULL) {}
   void clone();
   void record(Node* initial, Node* improved);
   void transfer_from(const ReplacedNodes& other, uint idx);
   void reset();
   void apply(Node* n);
   void merge_with(const ReplacedNodes& other);
   bool is_empty() const;
   void dump(outputStream *st) const;
   void apply(Compile* C, Node* ctl);
 };
 #endif // SHARE_VM_OPTO_REPLACEDNODES_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/replacednodes.hpp@fc2c88ea11a9 (annotated)

src/share/vm/opto/replacednodes.hpp