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PojavLauncherTeam
GitHub Repository: PojavLauncherTeam/openj9
 Path: blob/master/runtime/compiler/ilgen/ClassLookahead.hpp
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/*******************************************************************************

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 * Copyright (c) 2000, 2016 IBM Corp. and others

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 *

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 * This program and the accompanying materials are made available under

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 * the terms of the Eclipse Public License 2.0 which accompanies this

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 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/

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 * or the Apache License, Version 2.0 which accompanies this distribution and

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 * is available at https://www.apache.org/licenses/LICENSE-2.0.

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 *

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 * This Source Code may also be made available under the following

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 * Secondary Licenses when the conditions for such availability set

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 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU

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 * General Public License, version 2 with the GNU Classpath

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 * Exception [1] and GNU General Public License, version 2 with the

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 * OpenJDK Assembly Exception [2].

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 *

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 * [1] https://www.gnu.org/software/classpath/license.html

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 * [2] http://openjdk.java.net/legal/assembly-exception.html

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 *

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 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception

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 *******************************************************************************/

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#ifndef ClassLookahead_h

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#define ClassLookahead_h

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#include "compile/Compilation.hpp"

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#include "env/CHTable.hpp"

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#include "env/VMJ9.h"

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class TR_ClassLookahead

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   {

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public:

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   TR_ALLOC(TR_Memory::ClassLookahead)

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   TR_ClassLookahead(TR_PersistentClassInfo *, TR_FrontEnd *, TR::Compilation *, TR::SymbolReferenceTable *);

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   int32_t perform();

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   TR_PersistentArrayFieldInfo *getExistingArrayFieldInfo(TR::Symbol *, TR::SymbolReference *);

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   TR_PersistentFieldInfo *getExistingFieldInfo(TR::Symbol *, TR::SymbolReference *, bool canMorph = true);

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   void  findInitializerMethods(List<TR_ResolvedMethod> *, List<TR::ResolvedMethodSymbol> *, List<TR::ResolvedMethodSymbol> *, TR::ResolvedMethodSymbol **, bool *peekFailedForAnyMethod);

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   void initializeFieldInfo();

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   void updateFieldInfo();

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   void makeInfoPersistent();

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   bool examineNode(TR::TreeTop *, TR::Node *, TR::Node *, int32_t, TR::Node *, vcount_t);

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   void invalidateIfEscapingLoad(TR::TreeTop *, TR::Node *, TR::Node *, int32_t, TR::Node *);

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   bool isProperFieldAccess(TR::Node *);

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   bool isPrivateFieldAccess(TR::Node *);

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   TR::Compilation * comp()           {return _compilation;}

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   TR_FrontEnd *    fe()             {return _fe;}

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   TR_J9VMBase * fej9()              {return (TR_J9VMBase *)_fe; }

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   TR_Debug   * getDebug()       {return _compilation->getDebug();}

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   // Checking NaN

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   //void TR_ClassLookahead::checkAndInvalidateNonNaNProperty(TR::Node *, TR_PersistentFieldInfo *);

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   //int32_t TR_ClassLookahead::mustNotContainNaN(TR::Node *);

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   bool findMethod(List<TR::ResolvedMethodSymbol> *, TR::ResolvedMethodSymbol *);

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   static char *getFieldSignature(TR::Compilation *, TR::Symbol *, TR::SymbolReference *, int32_t &length);

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private:

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   // data

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   //

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   TR_FrontEnd *                           _fe;

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   TR::Compilation *                  _compilation;

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   TR::SymbolReferenceTable *         _symRefTab;

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   TR_OpaqueClassBlock *             _classPointer;

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   TR_PersistentClassInfoForFields * _classFieldInfo;

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   TR_PersistentClassInfo          * _classInfo;

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   TR::ResolvedMethodSymbol *         _currentMethodSymbol;

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   bool                              _inFirstBlock;

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   bool                              _inInitializerMethod;

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   bool                              _inFirstInitializerMethod;

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   bool                              _inClassInitializerMethod;

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   bool                              _traceIt;

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   };

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#endif

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