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Diffstat (limited to 'src/qml/qml/v4vm/qv4jsir_p.h')
| -rw-r--r-- | src/qml/qml/v4vm/qv4jsir_p.h | 821 |
1 files changed, 821 insertions, 0 deletions
diff --git a/src/qml/qml/v4vm/qv4jsir_p.h b/src/qml/qml/v4vm/qv4jsir_p.h new file mode 100644 index 0000000000..47368449fc --- /dev/null +++ b/src/qml/qml/v4vm/qv4jsir_p.h @@ -0,0 +1,821 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the V4VM module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#ifndef QV4IR_P_H +#define QV4IR_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 "qv4global.h" +#include <private/qqmljsmemorypool_p.h> + +#include <QtCore/QVector> +#include <QtCore/QString> +#include <QtCore/QBitArray> + +#ifdef CONST +#undef CONST +#endif + +QT_BEGIN_NAMESPACE + +class QTextStream; +class QQmlType; + +namespace QQmlJS { + +inline bool isNegative(double d) +{ + uchar *dch = (uchar *)&d; + if (QSysInfo::ByteOrder == QSysInfo::BigEndian) + return (dch[0] & 0x80); + else + return (dch[7] & 0x80); + +} + +namespace VM { +struct ExecutionContext; +struct Value; +} + +namespace V4IR { + +struct BasicBlock; +struct Function; +struct Module; + +struct Stmt; +struct Expr; + +// expressions +struct Const; +struct String; +struct RegExp; +struct Name; +struct Temp; +struct Closure; +struct Unop; +struct Binop; +struct Call; +struct New; +struct Subscript; +struct Member; + +// statements +struct Exp; +struct Enter; +struct Leave; +struct Move; +struct Jump; +struct CJump; +struct Ret; +struct Try; + +enum AluOp { + OpInvalid = 0, + + OpIfTrue, + OpNot, + OpUMinus, + OpUPlus, + OpCompl, + OpIncrement, + OpDecrement, + + OpBitAnd, + OpBitOr, + OpBitXor, + + OpAdd, + OpSub, + OpMul, + OpDiv, + OpMod, + + OpLShift, + OpRShift, + OpURShift, + + OpGt, + OpLt, + OpGe, + OpLe, + OpEqual, + OpNotEqual, + OpStrictEqual, + OpStrictNotEqual, + + OpInstanceof, + OpIn, + + OpAnd, + OpOr, + + LastAluOp = OpOr +}; +AluOp binaryOperator(int op); +const char *opname(V4IR::AluOp op); + +enum Type { + MissingType, // Used to indicate holes in array initialization (e.g. [,,]) + UndefinedType, + NullType, + BoolType, + NumberType +}; + +struct ExprVisitor { + virtual ~ExprVisitor() {} + virtual void visitConst(Const *) = 0; + virtual void visitString(String *) = 0; + virtual void visitRegExp(RegExp *) = 0; + virtual void visitName(Name *) = 0; + virtual void visitTemp(Temp *) = 0; + virtual void visitClosure(Closure *) = 0; + virtual void visitUnop(Unop *) = 0; + virtual void visitBinop(Binop *) = 0; + virtual void visitCall(Call *) = 0; + virtual void visitNew(New *) = 0; + virtual void visitSubscript(Subscript *) = 0; + virtual void visitMember(Member *) = 0; +}; + +struct StmtVisitor { + virtual ~StmtVisitor() {} + virtual void visitExp(Exp *) = 0; + virtual void visitEnter(Enter *) = 0; + virtual void visitLeave(Leave *) = 0; + virtual void visitMove(Move *) = 0; + virtual void visitJump(Jump *) = 0; + virtual void visitCJump(CJump *) = 0; + virtual void visitRet(Ret *) = 0; + virtual void visitTry(Try *) = 0; +}; + +struct Expr { + virtual ~Expr() {} + virtual void accept(ExprVisitor *) = 0; + virtual bool isLValue() { return false; } + virtual Const *asConst() { return 0; } + virtual String *asString() { return 0; } + virtual RegExp *asRegExp() { return 0; } + virtual Name *asName() { return 0; } + virtual Temp *asTemp() { return 0; } + virtual Closure *asClosure() { return 0; } + virtual Unop *asUnop() { return 0; } + virtual Binop *asBinop() { return 0; } + virtual Call *asCall() { return 0; } + virtual New *asNew() { return 0; } + virtual Subscript *asSubscript() { return 0; } + virtual Member *asMember() { return 0; } + virtual void dump(QTextStream &out) = 0; +}; + +struct ExprList { + Expr *expr; + ExprList *next; + + void init(Expr *expr, ExprList *next = 0) + { + this->expr = expr; + this->next = next; + } +}; + +struct Const: Expr { + Type type; + double value; + + void init(Type type, double value) + { + this->type = type; + this->value = value; + } + + virtual void accept(ExprVisitor *v) { v->visitConst(this); } + virtual Const *asConst() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct String: Expr { + const QString *value; + + void init(const QString *value) + { + this->value = value; + } + + virtual void accept(ExprVisitor *v) { v->visitString(this); } + virtual String *asString() { return this; } + + virtual void dump(QTextStream &out); + static QString escape(const QString &s); +}; + +struct RegExp: Expr { + // needs to be compatible with the flags in the lexer + enum Flags { + RegExp_Global = 0x01, + RegExp_IgnoreCase = 0x02, + RegExp_Multiline = 0x04 + }; + + const QString *value; + int flags; + + void init(const QString *value, int flags) + { + this->value = value; + this->flags = flags; + } + + virtual void accept(ExprVisitor *v) { v->visitRegExp(this); } + virtual RegExp *asRegExp() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Name: Expr { + enum Builtin { + builtin_invalid, + builtin_typeof, + builtin_delete, + builtin_postincrement, + builtin_postdecrement, + builtin_throw, + builtin_finish_try, + builtin_foreach_iterator_object, + builtin_foreach_next_property_name, + builtin_push_with_scope, + builtin_pop_scope, + builtin_declare_vars, + builtin_define_property, + builtin_define_array, + builtin_define_getter_setter + }; + + const QString *id; + Builtin builtin; + bool global; + quint32 line; + quint32 column; + + void initGlobal(const QString *id, quint32 line, quint32 column); + void init(const QString *id, quint32 line, quint32 column); + void init(Builtin builtin, quint32 line, quint32 column); + + virtual void accept(ExprVisitor *v) { v->visitName(this); } + virtual bool isLValue() { return true; } + virtual Name *asName() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Temp: Expr { + int index; + int scope; // how many scopes outside the current one? + + void init(int index, int scope = 0) + { + this->index = index; + this->scope = scope; + } + + virtual void accept(ExprVisitor *v) { v->visitTemp(this); } + virtual bool isLValue() { return true; } + virtual Temp *asTemp() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Closure: Expr { + Function *value; + + void init(Function *value) + { + this->value = value; + } + + virtual void accept(ExprVisitor *v) { v->visitClosure(this); } + virtual Closure *asClosure() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Unop: Expr { + AluOp op; + Temp *expr; + + void init(AluOp op, Temp *expr) + { + this->op = op; + this->expr = expr; + } + + virtual void accept(ExprVisitor *v) { v->visitUnop(this); } + virtual Unop *asUnop() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Binop: Expr { + AluOp op; + Expr *left; // Temp or Const + Expr *right; // Temp or Const + + void init(AluOp op, Expr *left, Expr *right) + { + this->op = op; + this->left = left; + this->right = right; + } + + virtual void accept(ExprVisitor *v) { v->visitBinop(this); } + virtual Binop *asBinop() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Call: Expr { + Expr *base; // Name, Member, Temp + ExprList *args; // List of Temps + + void init(Expr *base, ExprList *args) + { + this->base = base; + this->args = args; + } + + Expr *onlyArgument() const { + if (args && ! args->next) + return args->expr; + return 0; + } + + virtual void accept(ExprVisitor *v) { v->visitCall(this); } + virtual Call *asCall() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct New: Expr { + Expr *base; // Name, Member, Temp + ExprList *args; // List of Temps + + void init(Expr *base, ExprList *args) + { + this->base = base; + this->args = args; + } + + Expr *onlyArgument() const { + if (args && ! args->next) + return args->expr; + return 0; + } + + virtual void accept(ExprVisitor *v) { v->visitNew(this); } + virtual New *asNew() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Subscript: Expr { + Temp *base; + Temp *index; + + void init(Temp *base, Temp *index) + { + this->base = base; + this->index = index; + } + + virtual void accept(ExprVisitor *v) { v->visitSubscript(this); } + virtual bool isLValue() { return true; } + virtual Subscript *asSubscript() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Member: Expr { + Temp *base; + const QString *name; + + void init(Temp *base, const QString *name) + { + this->base = base; + this->name = name; + } + + virtual void accept(ExprVisitor *v) { v->visitMember(this); } + virtual bool isLValue() { return true; } + virtual Member *asMember() { return this; } + + virtual void dump(QTextStream &out); +}; + +struct Stmt { + enum Mode { + HIR, + MIR + }; + + struct Data { + QVector<unsigned> uses; + QVector<unsigned> defs; + QBitArray liveIn; + QBitArray liveOut; + }; + + Data *d; + + Stmt(): d(0) {} + virtual ~Stmt() { Q_UNREACHABLE(); } + virtual Stmt *asTerminator() { return 0; } + + virtual void accept(StmtVisitor *) = 0; + virtual Exp *asExp() { return 0; } + virtual Move *asMove() { return 0; } + virtual Enter *asEnter() { return 0; } + virtual Leave *asLeave() { return 0; } + virtual Jump *asJump() { return 0; } + virtual CJump *asCJump() { return 0; } + virtual Ret *asRet() { return 0; } + virtual Try *asTry() { return 0; } + virtual void dump(QTextStream &out, Mode mode = HIR) = 0; + + void destroyData() { + delete d; + d = 0; + } +}; + +struct Exp: Stmt { + Expr *expr; + + void init(Expr *expr) + { + this->expr = expr; + } + + virtual void accept(StmtVisitor *v) { v->visitExp(this); } + virtual Exp *asExp() { return this; } + + virtual void dump(QTextStream &out, Mode); +}; + +struct Move: Stmt { + Expr *target; // LHS - Temp, Name, Member or Subscript + Expr *source; + AluOp op; + + void init(Expr *target, Expr *source, AluOp op) + { + this->target = target; + this->source = source; + this->op = op; + } + + virtual void accept(StmtVisitor *v) { v->visitMove(this); } + virtual Move *asMove() { return this; } + + virtual void dump(QTextStream &out, Mode); +}; + +struct Enter: Stmt { + Expr *expr; + + void init(Expr *expr) + { + this->expr = expr; + } + + virtual void accept(StmtVisitor *v) { v->visitEnter(this); } + virtual Enter *asEnter() { return this; } + + virtual void dump(QTextStream &out, Mode); +}; + +struct Leave: Stmt { + void init() {} + + virtual void accept(StmtVisitor *v) { v->visitLeave(this); } + virtual Leave *asLeave() { return this; } + + virtual void dump(QTextStream &out, Mode); +}; + +struct Jump: Stmt { + BasicBlock *target; + + void init(BasicBlock *target) + { + this->target = target; + } + + virtual Stmt *asTerminator() { return this; } + + virtual void accept(StmtVisitor *v) { v->visitJump(this); } + virtual Jump *asJump() { return this; } + + virtual void dump(QTextStream &out, Mode mode); +}; + +struct CJump: Stmt { + Expr *cond; // Temp, Binop + BasicBlock *iftrue; + BasicBlock *iffalse; + + void init(Expr *cond, BasicBlock *iftrue, BasicBlock *iffalse) + { + this->cond = cond; + this->iftrue = iftrue; + this->iffalse = iffalse; + } + + virtual Stmt *asTerminator() { return this; } + + virtual void accept(StmtVisitor *v) { v->visitCJump(this); } + virtual CJump *asCJump() { return this; } + + virtual void dump(QTextStream &out, Mode mode); +}; + +struct Ret: Stmt { + Temp *expr; + + void init(Temp *expr) + { + this->expr = expr; + } + + virtual Stmt *asTerminator() { return this; } + + virtual void accept(StmtVisitor *v) { v->visitRet(this); } + virtual Ret *asRet() { return this; } + + virtual void dump(QTextStream &out, Mode); +}; + +struct Try: Stmt { + BasicBlock *tryBlock; + BasicBlock *catchBlock; + QString exceptionVarName; + Temp *exceptionVar; // place to store the caught exception, for use when re-throwing + + void init(BasicBlock *tryBlock, BasicBlock *catchBlock, const QString &exceptionVarName, Temp *exceptionVar) + { + this->tryBlock = tryBlock; + this->catchBlock = catchBlock; + this->exceptionVarName = exceptionVarName; + this->exceptionVar = exceptionVar; + } + + virtual Stmt *asTerminator() { return this; } + + virtual void accept(StmtVisitor *v) { v->visitTry(this); } + virtual Try *asTry() { return this; } + + virtual void dump(QTextStream &out, Mode mode); +}; + +struct Q_V4_EXPORT Module { + MemoryPool pool; + QVector<Function *> functions; + Function *rootFunction; + + Function *newFunction(const QString &name, Function *outer); + + Module() : rootFunction(0) {} + ~Module(); +}; + +struct Function { + Module *module; + MemoryPool *pool; + const QString *name; + QVector<BasicBlock *> basicBlocks; + int tempCount; + int maxNumberOfArguments; + QSet<QString> strings; + QList<const QString *> formals; + QList<const QString *> locals; + QVector<Function *> nestedFunctions; + Function *outer; + + int insideWithOrCatch; + + uint hasDirectEval: 1; + uint usesArgumentsObject : 1; + uint isStrict: 1; + uint isNamedExpression : 1; + uint hasTry: 1; + uint hasWith: 1; + uint unused : 26; + + template <typename _Tp> _Tp *New() { return new (pool->allocate(sizeof(_Tp))) _Tp(); } + + Function(Module *module, Function *outer, const QString &name) + : module(module) + , pool(&module->pool) + , tempCount(0) + , maxNumberOfArguments(0) + , outer(outer) + , insideWithOrCatch(0) + , hasDirectEval(false) + , usesArgumentsObject(false) + , isStrict(false) + , isNamedExpression(false) + , hasTry(false) + , hasWith(false) + , unused(0) + { this->name = newString(name); } + + ~Function(); + + enum BasicBlockInsertMode { + InsertBlock, + DontInsertBlock + }; + + BasicBlock *newBasicBlock(BasicBlockInsertMode mode = InsertBlock); + const QString *newString(const QString &text); + + void RECEIVE(const QString &name) { formals.append(newString(name)); } + void LOCAL(const QString &name) { locals.append(newString(name)); } + + inline BasicBlock *insertBasicBlock(BasicBlock *block) { basicBlocks.append(block); return block; } + + void dump(QTextStream &out, Stmt::Mode mode = Stmt::HIR); + + void removeSharedExpressions(); + + int indexOfArgument(const QStringRef &string) const; +}; + +struct BasicBlock { + Function *function; + QVector<Stmt *> statements; + QVector<BasicBlock *> in; + QVector<BasicBlock *> out; + QBitArray liveIn; + QBitArray liveOut; + int index; + int offset; + + BasicBlock(Function *function): function(function), index(-1), offset(-1) {} + ~BasicBlock() {} + + template <typename Instr> inline Instr i(Instr i) { statements.append(i); return i; } + + inline bool isEmpty() const { + return statements.isEmpty(); + } + + inline Stmt *terminator() const { + if (! statements.isEmpty() && statements.at(statements.size() - 1)->asTerminator() != 0) + return statements.at(statements.size() - 1); + return 0; + } + + inline bool isTerminated() const { + if (terminator() != 0) + return true; + return false; + } + + unsigned newTemp(); + + Temp *TEMP(int index, uint scope = 0); + + Expr *CONST(Type type, double value); + Expr *STRING(const QString *value); + Expr *REGEXP(const QString *value, int flags); + + Name *NAME(const QString &id, quint32 line, quint32 column); + Name *NAME(Name::Builtin builtin, quint32 line, quint32 column); + + Name *GLOBALNAME(const QString &id, quint32 line, quint32 column); + + Closure *CLOSURE(Function *function); + + Expr *UNOP(AluOp op, Temp *expr); + Expr *BINOP(AluOp op, Expr *left, Expr *right); + Expr *CALL(Expr *base, ExprList *args = 0); + Expr *NEW(Expr *base, ExprList *args = 0); + Expr *SUBSCRIPT(Temp *base, Temp *index); + Expr *MEMBER(Temp *base, const QString *name); + + Stmt *EXP(Expr *expr); + Stmt *ENTER(Expr *expr); + Stmt *LEAVE(); + + Stmt *MOVE(Expr *target, Expr *source, AluOp op = V4IR::OpInvalid); + + Stmt *JUMP(BasicBlock *target); + Stmt *CJUMP(Expr *cond, BasicBlock *iftrue, BasicBlock *iffalse); + Stmt *RET(Temp *expr); + Stmt *TRY(BasicBlock *tryBlock, BasicBlock *catchBlock, const QString &exceptionVarName, Temp *exceptionVar); + + void dump(QTextStream &out, Stmt::Mode mode = Stmt::HIR); +}; + +class CloneExpr: protected V4IR::ExprVisitor +{ +public: + explicit CloneExpr(V4IR::BasicBlock *block = 0); + + void setBasicBlock(V4IR::BasicBlock *block); + + template <typename _Expr> + _Expr *operator()(_Expr *expr) + { + return clone(expr); + } + + template <typename _Expr> + _Expr *clone(_Expr *expr) + { + Expr *c = expr; + qSwap(cloned, c); + expr->accept(this); + qSwap(cloned, c); + return static_cast<_Expr *>(c); + } + +protected: + V4IR::ExprList *clone(V4IR::ExprList *list); + + virtual void visitConst(Const *); + virtual void visitString(String *); + virtual void visitRegExp(RegExp *); + virtual void visitName(Name *); + virtual void visitTemp(Temp *); + virtual void visitClosure(Closure *); + virtual void visitUnop(Unop *); + virtual void visitBinop(Binop *); + virtual void visitCall(Call *); + virtual void visitNew(New *); + virtual void visitSubscript(Subscript *); + virtual void visitMember(Member *); + +private: + V4IR::BasicBlock *block; + V4IR::Expr *cloned; +}; + +} // end of namespace IR + +} // end of namespace QQmlJS + +QT_END_NAMESPACE + +#endif // QV4IR_P_H |