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#ifndef QV4CODEGEN_P_H
#define QV4CODEGEN_P_H
#include "qv4ir_p.h"
#include <private/qqmljsastvisitor_p.h>
namespace QQmlJS {
namespace AST {
class UiParameterList;
}
class Codegen: protected AST::Visitor
{
public:
Codegen();
IR::Function *operator()(AST::Program *ast, IR::Module *module);
protected:
enum Format { ex, cx, nx };
struct Result {
IR::Expr *code;
IR::BasicBlock *iftrue;
IR::BasicBlock *iffalse;
Format format;
Format requested;
explicit Result(Format requested = ex)
: code(0)
, iftrue(0)
, iffalse(0)
, format(ex)
, requested(requested) {}
explicit Result(IR::BasicBlock *iftrue, IR::BasicBlock *iffalse)
: code(0)
, iftrue(iftrue)
, iffalse(iffalse)
, format(ex)
, requested(cx) {}
inline IR::Expr *operator*() const { Q_ASSERT(format == ex); return code; }
inline IR::Expr *operator->() const { Q_ASSERT(format == ex); return code; }
bool accept(Format f)
{
if (requested == f) {
format = f;
return true;
}
return false;
}
};
struct Environment {
Environment *parent;
QHash<QString, int> members;
QVector<QString> vars;
int maxNumberOfArguments;
bool hasDirectEval;
bool hasNestedFunctions;
Environment(Environment *parent)
: parent(parent)
, maxNumberOfArguments(0)
, hasDirectEval(false)
, hasNestedFunctions(false) {}
int findMember(const QString &name) const
{
return members.value(name, -1);
}
bool lookupMember(const QString &name, Environment **scope, int *index, int *distance)
{
Environment *it = this;
*distance = 0;
for (; it; it = it->parent, ++(*distance)) {
int idx = it->findMember(name);
if (idx != -1) {
*scope = it;
*index = idx;
return true;
}
}
return false;
}
void enter(const QString &name)
{
if (! name.isEmpty()) {
int idx = members.value(name, -1);
if (idx == -1) {
members.insert(name, vars.count());
vars.append(name);
}
}
}
};
Environment *newEnvironment(AST::Node *node, Environment *parent)
{
Environment *env = new Environment(parent);
_envMap.insert(node, env);
return env;
}
struct UiMember {
};
struct Loop {
IR::BasicBlock *breakBlock;
IR::BasicBlock *continueBlock;
Loop()
: breakBlock(0), continueBlock(0) {}
Loop(IR::BasicBlock *breakBlock, IR::BasicBlock *continueBlock)
: breakBlock(breakBlock), continueBlock(continueBlock) {}
};
void enterEnvironment(AST::Node *node);
void leaveEnvironment();
IR::Expr *member(IR::Expr *base, const QString *name);
IR::Expr *subscript(IR::Expr *base, IR::Expr *index);
IR::Expr *argument(IR::Expr *expr);
IR::Expr *unop(IR::AluOp op, IR::Expr *expr);
IR::Expr *binop(IR::AluOp op, IR::Expr *left, IR::Expr *right);
IR::Expr *call(IR::Expr *base, IR::ExprList *args);
void move(IR::Expr *target, IR::Expr *source, IR::AluOp op = IR::OpInvalid);
void cjump(IR::Expr *cond, IR::BasicBlock *iftrue, IR::BasicBlock *iffalse);
void linearize(IR::Function *function);
IR::Function *defineFunction(const QString &name, AST::Node *ast, AST::FormalParameterList *formals,
AST::SourceElements *body, bool isDeclaration = false);
int indexOfLocal(const QStringRef &string) const;
int indexOfArgument(const QStringRef &string) const;
void statement(AST::Statement *ast);
void statement(AST::ExpressionNode *ast);
void condition(AST::ExpressionNode *ast, IR::BasicBlock *iftrue, IR::BasicBlock *iffalse);
Result expression(AST::ExpressionNode *ast);
QString propertyName(AST::PropertyName *ast);
Result sourceElement(AST::SourceElement *ast);
UiMember uiObjectMember(AST::UiObjectMember *ast);
void accept(AST::Node *node);
void functionBody(AST::FunctionBody *ast);
void program(AST::Program *ast);
void sourceElements(AST::SourceElements *ast);
void variableDeclaration(AST::VariableDeclaration *ast);
void variableDeclarationList(AST::VariableDeclarationList *ast);
// nodes
virtual bool visit(AST::ArgumentList *ast);
virtual bool visit(AST::CaseBlock *ast);
virtual bool visit(AST::CaseClause *ast);
virtual bool visit(AST::CaseClauses *ast);
virtual bool visit(AST::Catch *ast);
virtual bool visit(AST::DefaultClause *ast);
virtual bool visit(AST::ElementList *ast);
virtual bool visit(AST::Elision *ast);
virtual bool visit(AST::Finally *ast);
virtual bool visit(AST::FormalParameterList *ast);
virtual bool visit(AST::FunctionBody *ast);
virtual bool visit(AST::Program *ast);
virtual bool visit(AST::PropertyNameAndValueList *ast);
virtual bool visit(AST::SourceElements *ast);
virtual bool visit(AST::StatementList *ast);
virtual bool visit(AST::UiArrayMemberList *ast);
virtual bool visit(AST::UiImport *ast);
virtual bool visit(AST::UiImportList *ast);
virtual bool visit(AST::UiObjectInitializer *ast);
virtual bool visit(AST::UiObjectMemberList *ast);
virtual bool visit(AST::UiParameterList *ast);
virtual bool visit(AST::UiProgram *ast);
virtual bool visit(AST::UiQualifiedId *ast);
virtual bool visit(AST::VariableDeclaration *ast);
virtual bool visit(AST::VariableDeclarationList *ast);
// expressions
virtual bool visit(AST::Expression *ast);
virtual bool visit(AST::ArrayLiteral *ast);
virtual bool visit(AST::ArrayMemberExpression *ast);
virtual bool visit(AST::BinaryExpression *ast);
virtual bool visit(AST::CallExpression *ast);
virtual bool visit(AST::ConditionalExpression *ast);
virtual bool visit(AST::DeleteExpression *ast);
virtual bool visit(AST::FalseLiteral *ast);
virtual bool visit(AST::FieldMemberExpression *ast);
virtual bool visit(AST::FunctionExpression *ast);
virtual bool visit(AST::IdentifierExpression *ast);
virtual bool visit(AST::NestedExpression *ast);
virtual bool visit(AST::NewExpression *ast);
virtual bool visit(AST::NewMemberExpression *ast);
virtual bool visit(AST::NotExpression *ast);
virtual bool visit(AST::NullExpression *ast);
virtual bool visit(AST::NumericLiteral *ast);
virtual bool visit(AST::ObjectLiteral *ast);
virtual bool visit(AST::PostDecrementExpression *ast);
virtual bool visit(AST::PostIncrementExpression *ast);
virtual bool visit(AST::PreDecrementExpression *ast);
virtual bool visit(AST::PreIncrementExpression *ast);
virtual bool visit(AST::RegExpLiteral *ast);
virtual bool visit(AST::StringLiteral *ast);
virtual bool visit(AST::ThisExpression *ast);
virtual bool visit(AST::TildeExpression *ast);
virtual bool visit(AST::TrueLiteral *ast);
virtual bool visit(AST::TypeOfExpression *ast);
virtual bool visit(AST::UnaryMinusExpression *ast);
virtual bool visit(AST::UnaryPlusExpression *ast);
virtual bool visit(AST::VoidExpression *ast);
virtual bool visit(AST::FunctionDeclaration *ast);
// property names
virtual bool visit(AST::IdentifierPropertyName *ast);
virtual bool visit(AST::NumericLiteralPropertyName *ast);
virtual bool visit(AST::StringLiteralPropertyName *ast);
// source elements
virtual bool visit(AST::FunctionSourceElement *ast);
virtual bool visit(AST::StatementSourceElement *ast);
// statements
virtual bool visit(AST::Block *ast);
virtual bool visit(AST::BreakStatement *ast);
virtual bool visit(AST::ContinueStatement *ast);
virtual bool visit(AST::DebuggerStatement *ast);
virtual bool visit(AST::DoWhileStatement *ast);
virtual bool visit(AST::EmptyStatement *ast);
virtual bool visit(AST::ExpressionStatement *ast);
virtual bool visit(AST::ForEachStatement *ast);
virtual bool visit(AST::ForStatement *ast);
virtual bool visit(AST::IfStatement *ast);
virtual bool visit(AST::LabelledStatement *ast);
virtual bool visit(AST::LocalForEachStatement *ast);
virtual bool visit(AST::LocalForStatement *ast);
virtual bool visit(AST::ReturnStatement *ast);
virtual bool visit(AST::SwitchStatement *ast);
virtual bool visit(AST::ThrowStatement *ast);
virtual bool visit(AST::TryStatement *ast);
virtual bool visit(AST::VariableStatement *ast);
virtual bool visit(AST::WhileStatement *ast);
virtual bool visit(AST::WithStatement *ast);
// ui object members
virtual bool visit(AST::UiArrayBinding *ast);
virtual bool visit(AST::UiObjectBinding *ast);
virtual bool visit(AST::UiObjectDefinition *ast);
virtual bool visit(AST::UiPublicMember *ast);
virtual bool visit(AST::UiScriptBinding *ast);
virtual bool visit(AST::UiSourceElement *ast);
private:
Result _expr;
QString _property;
UiMember _uiMember;
Loop _loop;
IR::Module *_module;
IR::Function *_function;
IR::BasicBlock *_block;
IR::BasicBlock *_exitBlock;
IR::BasicBlock *_throwBlock;
IR::BasicBlock *_handlersBlock;
unsigned _returnAddress;
Environment *_env;
QHash<AST::Node *, Environment *> _envMap;
class ScanFunctions;
};
} // end of namespace QQmlJS
#endif // QV4CODEGEN_P_H
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