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view src/share/vm/c1/c1_Canonicalizer.hpp @ 1721:413ad0331a0c

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6977924: Changes for 6975078 produce build error with certain gcc versions Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error. Reviewed-by: jcoomes, ysr, phh
author johnc
date Wed, 18 Aug 2010 10:59:06 -0700
parents c18cbe5936b8
children d5d065957597
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/*
 * Copyright (c) 1999, 2006, 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.
 *
 */

class Canonicalizer: InstructionVisitor {
 private:
  Instruction* _canonical;
  int _bci;

  void set_canonical(Value x);
  void set_bci(int bci)                          { _bci = bci; }
  void set_constant(jint x)                      { set_canonical(new Constant(new IntConstant(x))); }
  void set_constant(jlong x)                     { set_canonical(new Constant(new LongConstant(x))); }
  void set_constant(jfloat x)                    { set_canonical(new Constant(new FloatConstant(x))); }
  void set_constant(jdouble x)                   { set_canonical(new Constant(new DoubleConstant(x))); }
  void move_const_to_right(Op2* x);
  void do_Op2(Op2* x);
  void do_UnsafeRawOp(UnsafeRawOp* x);

  void unsafe_raw_match(UnsafeRawOp* x,
                        Instruction** base,
                        Instruction** index,
                        int* scale);

 public:
  Canonicalizer(Value x, int bci)                { _canonical = x; _bci = bci; if (CanonicalizeNodes) x->visit(this); }
  Value canonical() const                        { return _canonical; }
  int bci() const                                { return _bci; }

  virtual void do_Phi            (Phi*             x);
  virtual void do_Constant       (Constant*        x);
  virtual void do_Local          (Local*           x);
  virtual void do_LoadField      (LoadField*       x);
  virtual void do_StoreField     (StoreField*      x);
  virtual void do_ArrayLength    (ArrayLength*     x);
  virtual void do_LoadIndexed    (LoadIndexed*     x);
  virtual void do_StoreIndexed   (StoreIndexed*    x);
  virtual void do_NegateOp       (NegateOp*        x);
  virtual void do_ArithmeticOp   (ArithmeticOp*    x);
  virtual void do_ShiftOp        (ShiftOp*         x);
  virtual void do_LogicOp        (LogicOp*         x);
  virtual void do_CompareOp      (CompareOp*       x);
  virtual void do_IfOp           (IfOp*            x);
  virtual void do_IfInstanceOf   (IfInstanceOf*    x);
  virtual void do_Convert        (Convert*         x);
  virtual void do_NullCheck      (NullCheck*       x);
  virtual void do_Invoke         (Invoke*          x);
  virtual void do_NewInstance    (NewInstance*     x);
  virtual void do_NewTypeArray   (NewTypeArray*    x);
  virtual void do_NewObjectArray (NewObjectArray*  x);
  virtual void do_NewMultiArray  (NewMultiArray*   x);
  virtual void do_CheckCast      (CheckCast*       x);
  virtual void do_InstanceOf     (InstanceOf*      x);
  virtual void do_MonitorEnter   (MonitorEnter*    x);
  virtual void do_MonitorExit    (MonitorExit*     x);
  virtual void do_Intrinsic      (Intrinsic*       x);
  virtual void do_BlockBegin     (BlockBegin*      x);
  virtual void do_Goto           (Goto*            x);
  virtual void do_If             (If*              x);
  virtual void do_TableSwitch    (TableSwitch*     x);
  virtual void do_LookupSwitch   (LookupSwitch*    x);
  virtual void do_Return         (Return*          x);
  virtual void do_Throw          (Throw*           x);
  virtual void do_Base           (Base*            x);
  virtual void do_OsrEntry       (OsrEntry*        x);
  virtual void do_ExceptionObject(ExceptionObject* x);
  virtual void do_RoundFP        (RoundFP*         x);
  virtual void do_UnsafeGetRaw   (UnsafeGetRaw*    x);
  virtual void do_UnsafePutRaw   (UnsafePutRaw*    x);
  virtual void do_UnsafeGetObject(UnsafeGetObject* x);
  virtual void do_UnsafePutObject(UnsafePutObject* x);
  virtual void do_UnsafePrefetchRead (UnsafePrefetchRead*  x);
  virtual void do_UnsafePrefetchWrite(UnsafePrefetchWrite* x);
  virtual void do_ProfileCall    (ProfileCall*     x);
  virtual void do_ProfileCounter (ProfileCounter*  x);
};