text: /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the QtQml module of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:LGPL21$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see http://www.qt.io/terms-conditions. For further
  ** information use the contact form at http://www.qt.io/contact-us.
  **
  ** GNU Lesser General Public License Usage
  ** Alternatively, this file may be used under the terms of the GNU Lesser
  ** General Public License version 2.1 or version 3 as published by the Free
  ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
  ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
  ** following information to ensure the GNU Lesser General Public License
  ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
  ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  **
  ** As a special exception, The Qt Company gives you certain additional
  ** rights. These rights are described in The Qt Company LGPL Exception
  ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/
  
  #ifndef QV4ISEL_P_H
  #define QV4ISEL_P_H
  
  //
  //  W A R N I N G
  //  -------------
  //
  // This file is not part of the Qt API.  It exists purely as an
  // implementation detail.  This header file may change from version to
  // version without notice, or even be removed.
  //
  // We mean it.
  //
  
  #include "private/qv4global_p.h"
  #include "qv4jsir_p.h"
  #include <private/qv4compileddata_p.h>
  #include <private/qv4compiler_p.h>
  
  #include <qglobal.h>
  #include <QHash>
  
  QT_BEGIN_NAMESPACE
  
  class QQmlEnginePrivate;
  
  namespace QV4 {
  
  class ExecutableAllocator;
  struct Function;
  
  class Q_QML_PRIVATE_EXPORT EvalInstructionSelection
  {
  public:
      EvalInstructionSelection(QV4::ExecutableAllocator *execAllocator, IR::Module *module, QV4::Compiler::JSUnitGenerator *jsGenerator);
      virtual ~EvalInstructionSelection() = 0;
  
      QQmlRefPointer<QV4::CompiledData::CompilationUnit> compile(bool generateUnitData = true);
  
      void setUseFastLookups(bool b) { useFastLookups = b; }
      void setUseTypeInference(bool onoff) { useTypeInference = onoff; }
  
      int registerString(const QString &str) { return jsGenerator->registerString(str); }
      uint registerIndexedGetterLookup() { return jsGenerator->registerIndexedGetterLookup(); }
      uint registerIndexedSetterLookup() { return jsGenerator->registerIndexedSetterLookup(); }
      uint registerGetterLookup(const QString &name) { return jsGenerator->registerGetterLookup(name); }
      uint registerSetterLookup(const QString &name) { return jsGenerator->registerSetterLookup(name); }
      uint registerGlobalGetterLookup(const QString &name) { return jsGenerator->registerGlobalGetterLookup(name); }
      int registerRegExp(IR::RegExp *regexp) { return jsGenerator->registerRegExp(regexp); }
      int registerJSClass(int count, IR::ExprList *args) { return jsGenerator->registerJSClass(count, args); }
      QV4::Compiler::JSUnitGenerator *jsUnitGenerator() const { return jsGenerator; }
  
  protected:
      virtual void run(int functionIndex) = 0;
      virtual QQmlRefPointer<QV4::CompiledData::CompilationUnit> backendCompileStep() = 0;
  
      bool useFastLookups;
      bool useTypeInference;
      QV4::ExecutableAllocator *executableAllocator;
      QV4::Compiler::JSUnitGenerator *jsGenerator;
      QScopedPointer<QV4::Compiler::JSUnitGenerator> ownJSGenerator;
      IR::Module *irModule;
  };
  
  class Q_QML_PRIVATE_EXPORT EvalISelFactory
  {
  public:
      virtual ~EvalISelFactory() = 0;
      virtual EvalInstructionSelection *create(QQmlEnginePrivate *qmlEngine, QV4::ExecutableAllocator *execAllocator, IR::Module *module, QV4::Compiler::JSUnitGenerator *jsGenerator) = 0;
      virtual bool jitCompileRegexps() const = 0;
  };
  
  namespace IR {
  class Q_QML_PRIVATE_EXPORT IRDecoder: protected IR::StmtVisitor
  {
  public:
      IRDecoder() : _function(0) {}
      virtual ~IRDecoder() = 0;
  
      virtual void visitPhi(IR::Phi *) {}
  
  public: // visitor methods for StmtVisitor:
      virtual void visitMove(IR::Move *s);
      virtual void visitExp(IR::Exp *s);
  
  public: // to implement by subclasses:
      virtual void callBuiltinInvalid(IR::Name *func, IR::ExprList *args, IR::Expr *result) = 0;
      virtual void callBuiltinTypeofQmlContextProperty(IR::Expr *base, IR::Member::MemberKind kind, int propertyIndex, IR::Expr *result) = 0;
      virtual void callBuiltinTypeofMember(IR::Expr *base, const QString &name, IR::Expr *result) = 0;
      virtual void callBuiltinTypeofSubscript(IR::Expr *base, IR::Expr *index, IR::Expr *result) = 0;
      virtual void callBuiltinTypeofName(const QString &name, IR::Expr *result) = 0;
      virtual void callBuiltinTypeofValue(IR::Expr *value, IR::Expr *result) = 0;
      virtual void callBuiltinDeleteMember(IR::Expr *base, const QString &name, IR::Expr *result) = 0;
      virtual void callBuiltinDeleteSubscript(IR::Expr *base, IR::Expr *index, IR::Expr *result) = 0;
      virtual void callBuiltinDeleteName(const QString &name, IR::Expr *result) = 0;
      virtual void callBuiltinDeleteValue(IR::Expr *result) = 0;
      virtual void callBuiltinThrow(IR::Expr *arg) = 0;
      virtual void callBuiltinReThrow() = 0;
      virtual void callBuiltinUnwindException(IR::Expr *) = 0;
      virtual void callBuiltinPushCatchScope(const QString &exceptionName) = 0;
      virtual void callBuiltinForeachIteratorObject(IR::Expr *arg, IR::Expr *result) = 0;
      virtual void callBuiltinForeachNextPropertyname(IR::Expr *arg, IR::Expr *result) = 0;
      virtual void callBuiltinPushWithScope(IR::Expr *arg) = 0;
      virtual void callBuiltinPopScope() = 0;
      virtual void callBuiltinDeclareVar(bool deletable, const QString &name) = 0;
      virtual void callBuiltinDefineArray(IR::Expr *result, IR::ExprList *args) = 0;
      virtual void callBuiltinDefineObjectLiteral(IR::Expr *result, int keyValuePairCount, IR::ExprList *keyValuePairs, IR::ExprList *arrayEntries, bool needSparseArray) = 0;
      virtual void callBuiltinSetupArgumentObject(IR::Expr *result) = 0;
      virtual void callBuiltinConvertThisToObject() = 0;
      virtual void callValue(IR::Expr *value, IR::ExprList *args, IR::Expr *result) = 0;
      virtual void callQmlContextProperty(IR::Expr *base, IR::Member::MemberKind kind, int propertyIndex, IR::ExprList *args, IR::Expr *result) = 0;
      virtual void callProperty(IR::Expr *base, const QString &name, IR::ExprList *args, IR::Expr *result) = 0;
      virtual void callSubscript(IR::Expr *base, IR::Expr *index, IR::ExprList *args, IR::Expr *result) = 0;
      virtual void convertType(IR::Expr *source, IR::Expr *target) = 0;
      virtual void constructActivationProperty(IR::Name *func, IR::ExprList *args, IR::Expr *result) = 0;
      virtual void constructProperty(IR::Expr *base, const QString &name, IR::ExprList *args, IR::Expr *result) = 0;
      virtual void constructValue(IR::Expr *value, IR::ExprList *args, IR::Expr *result) = 0;
      virtual void loadThisObject(IR::Expr *target) = 0;
      virtual void loadQmlContext(IR::Expr *target) = 0;
      virtual void loadQmlImportedScripts(IR::Expr *target) = 0;
      virtual void loadQmlSingleton(const QString &name, IR::Expr *target) = 0;
      virtual void loadConst(IR::Const *sourceConst, IR::Expr *target) = 0;
      virtual void loadString(const QString &str, IR::Expr *target) = 0;
      virtual void loadRegexp(IR::RegExp *sourceRegexp, IR::Expr *target) = 0;
      virtual void getActivationProperty(const IR::Name *name, IR::Expr *target) = 0;
      virtual void setActivationProperty(IR::Expr *source, const QString &targetName) = 0;
      virtual void initClosure(IR::Closure *closure, IR::Expr *target) = 0;
      virtual void getProperty(IR::Expr *base, const QString &name, IR::Expr *target) = 0;
      virtual void getQObjectProperty(IR::Expr *base, int propertyIndex, bool captureRequired, bool isSingletonProperty, int attachedPropertiesId, IR::Expr *target) = 0;
      virtual void getQmlContextProperty(IR::Expr *source, IR::Member::MemberKind kind, int index, IR::Expr *target) = 0;
      virtual void setProperty(IR::Expr *source, IR::Expr *targetBase, const QString &targetName) = 0;
      virtual void setQmlContextProperty(IR::Expr *source, IR::Expr *targetBase, IR::Member::MemberKind kind, int propertyIndex) = 0;
      virtual void setQObjectProperty(IR::Expr *source, IR::Expr *targetBase, int propertyIndex) = 0;
      virtual void getElement(IR::Expr *base, IR::Expr *index, IR::Expr *target) = 0;
      virtual void setElement(IR::Expr *source, IR::Expr *targetBase, IR::Expr *targetIndex) = 0;
      virtual void copyValue(IR::Expr *source, IR::Expr *target) = 0;
      virtual void swapValues(IR::Expr *source, IR::Expr *target) = 0;
      virtual void unop(IR::AluOp oper, IR::Expr *source, IR::Expr *target) = 0;
      virtual void binop(IR::AluOp oper, IR::Expr *leftSource, IR::Expr *rightSource, IR::Expr *target) = 0;
  
  protected:
      virtual void callBuiltin(IR::Call *c, IR::Expr *result);
  
      IR::Function *_function; // subclass needs to set
  };
  } // namespace IR
  
  } // namespace QV4
  
  QT_END_NAMESPACE
  
  #endif // QV4ISEL_P_H
  