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|
/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQml 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 QV4JSIR_P_H
#define QV4JSIR_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 <private/qqmljsmemorypool_p.h>
#include <private/qqmljsastfwd_p.h>
#include <QtCore/QVector>
#include <QtCore/QString>
#include <QtCore/QBitArray>
#include <QtCore/qurl.h>
#include <qglobal.h>
#if defined(CONST) && defined(Q_OS_WIN)
# define QT_POP_CONST
# pragma push_macro("CONST")
# undef CONST // CONST conflicts with our own identifier
#endif
QT_BEGIN_NAMESPACE
class QTextStream;
class QQmlType;
namespace QV4 {
struct ExecutionContext;
}
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 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 Convert;
struct Unop;
struct Binop;
struct Call;
struct New;
struct Subscript;
struct Member;
// statements
struct Exp;
struct Move;
struct Jump;
struct CJump;
struct Ret;
struct Try;
struct Phi;
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 {
UnknownType = 0,
MissingType = 1 << 0,
UndefinedType = 1 << 1,
NullType = 1 << 2,
BoolType = 1 << 3,
SInt32Type = 1 << 4,
UInt32Type = 1 << 5,
DoubleType = 1 << 6,
NumberType = SInt32Type | UInt32Type | DoubleType,
StringType = 1 << 7,
ObjectType = 1 << 8
};
inline bool strictlyEqualTypes(Type t1, Type t2)
{
return t1 == t2 || ((t1 & NumberType) && (t2 & NumberType));
}
QString typeName(Type t);
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 visitConvert(Convert *) = 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 visitMove(Move *) = 0;
virtual void visitJump(Jump *) = 0;
virtual void visitCJump(CJump *) = 0;
virtual void visitRet(Ret *) = 0;
virtual void visitTry(Try *) = 0;
virtual void visitPhi(Phi *) = 0;
};
struct Expr {
Type type;
Expr(): type(UnknownType) {}
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 Convert *asConvert() { 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) const = 0;
};
struct ExprList {
Expr *expr;
ExprList *next;
void init(Expr *expr, ExprList *next = 0)
{
this->expr = expr;
this->next = next;
}
};
struct Const: Expr {
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) const;
};
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) const;
static QString escape(const QString &s);
};
struct RegExp: Expr {
// needs to be compatible with the flags in the lexer, and in RegExpObject
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) const;
};
struct Name: Expr {
enum Builtin {
builtin_invalid,
builtin_typeof,
builtin_delete,
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,
builtin_define_object_literal,
builtin_setup_argument_object
};
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) const;
};
struct Temp: Expr {
enum Kind {
Formal = 0,
ScopedFormal,
Local,
ScopedLocal,
VirtualRegister,
PhysicalRegister,
StackSlot
};
unsigned index;
unsigned scope : 28; // how many scopes outside the current one?
unsigned kind : 3;
unsigned isArgumentsOrEval : 1;
void init(unsigned kind, unsigned index, unsigned scope)
{
Q_ASSERT((kind == ScopedLocal && scope != 0) ||
(kind == ScopedFormal && scope != 0) ||
(scope == 0));
this->kind = kind;
this->index = index;
this->scope = scope;
this->isArgumentsOrEval = false;
}
virtual void accept(ExprVisitor *v) { v->visitTemp(this); }
virtual bool isLValue() { return true; }
virtual Temp *asTemp() { return this; }
virtual void dump(QTextStream &out) const;
};
inline bool operator==(const Temp &t1, const Temp &t2) Q_DECL_NOTHROW
{ return t1.index == t2.index && t1.scope == t2.scope && t1.kind == t2.kind && t1.type == t2.type; }
inline uint qHash(const Temp &t, uint seed = 0) Q_DECL_NOTHROW
{ return t.index ^ (t.kind | (t.scope << 3)) ^ seed; }
bool operator<(const Temp &t1, const Temp &t2) Q_DECL_NOTHROW;
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) const;
};
struct Convert: Expr {
Expr *expr;
void init(Expr *expr, Type type)
{
this->expr = expr;
this->type = type;
}
virtual void accept(ExprVisitor *v) { v->visitConvert(this); }
virtual Convert *asConvert() { return this; }
virtual void dump(QTextStream &out) const;
};
struct Unop: Expr {
AluOp op;
Expr *expr;
void init(AluOp op, Expr *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) const;
};
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) const;
};
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) const;
};
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) const;
};
struct Subscript: Expr {
Expr *base;
Expr *index;
void init(Expr *base, Expr *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) const;
};
struct Member: Expr {
Expr *base;
const QString *name;
void init(Expr *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) const;
};
struct Stmt {
enum Mode {
HIR,
MIR
};
struct Data {
QVector<Expr *> incoming; // used by Phi nodes
};
Data *d;
int id;
AST::SourceLocation location;
Stmt(): d(0), id(-1) {}
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 Jump *asJump() { return 0; }
virtual CJump *asCJump() { return 0; }
virtual Ret *asRet() { return 0; }
virtual Try *asTry() { return 0; }
virtual Phi *asPhi() { 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;
bool swap;
void init(Expr *target, Expr *source, AluOp op)
{
this->target = target;
this->source = source;
this->op = op;
this->swap = false;
}
virtual void accept(StmtVisitor *v) { v->visitMove(this); }
virtual Move *asMove() { return this; }
virtual void dump(QTextStream &out, Mode mode = HIR);
};
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 {
Expr *expr;
void init(Expr *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;
const 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 Phi: Stmt {
Temp *targetTemp;
virtual void accept(StmtVisitor *v) { v->visitPhi(this); }
virtual Phi *asPhi() { return this; }
virtual void dump(QTextStream &out, Mode mode);
};
struct Q_QML_EXPORT Module {
MemoryPool pool;
QVector<Function *> functions;
Function *rootFunction;
QString fileName;
Function *newFunction(const QString &name, Function *outer);
Module() : rootFunction(0) {}
~Module();
void setFileName(const QString &name);
};
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;
// Location of declaration in source code (-1 if not specified)
int line;
int column;
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)
, line(-1)
, column(-1)
{ this->name = newString(name); }
~Function();
enum BasicBlockInsertMode {
InsertBlock,
DontInsertBlock
};
BasicBlock *newBasicBlock(BasicBlock *containingLoop, 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;
bool variablesCanEscape() const
{ return hasDirectEval || !nestedFunctions.isEmpty(); }
};
struct BasicBlock {
Function *function;
QVector<Stmt *> statements;
QVector<BasicBlock *> in;
QVector<BasicBlock *> out;
QBitArray liveIn;
QBitArray liveOut;
int index;
AST::SourceLocation nextLocation;
BasicBlock(Function *function, BasicBlock *containingLoop)
: function(function)
, index(-1)
, _containingGroup(containingLoop)
, _groupStart(false)
{}
~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(unsigned kind);
Temp *ARG(unsigned index, unsigned scope);
Temp *LOCAL(unsigned index, unsigned scope);
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 *CONVERT(Expr *expr, Type type);
Expr *UNOP(AluOp op, Expr *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(Expr *base, Expr *index);
Expr *MEMBER(Expr *base, const QString *name);
Stmt *EXP(Expr *expr);
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);
void appendStatement(Stmt *statement);
BasicBlock *containingGroup() const
{ return _containingGroup; }
bool isGroupStart() const
{ return _groupStart; }
void markAsGroupStart()
{ _groupStart = true; }
private:
BasicBlock *_containingGroup;
bool _groupStart;
};
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);
}
static Const *cloneConst(Const *c, Function *f)
{
Const *newConst = f->New<Const>();
newConst->init(c->type, c->value);
return newConst;
}
static Name *cloneName(Name *n, Function *f)
{
Name *newName = f->New<Name>();
newName->type = n->type;
newName->id = n->id;
newName->builtin = n->builtin;
newName->global = n->global;
newName->line = n->line;
newName->column = n->column;
return newName;
}
static Temp *cloneTemp(Temp *t, Function *f)
{
Temp *newTemp = f->New<Temp>();
newTemp->init(t->kind, t->index, t->scope);
newTemp->type = t->type;
return newTemp;
}
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 visitConvert(Convert *);
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
#if defined(QT_POP_CONST)
# pragma pop_macro("CONST") // Restore peace
# undef QT_POP_CONST
#endif
#endif // QV4IR_P_H
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