Initial support for resolving meta-property access for the scope and context objects at QML compile time

This avoids having to do a string lookup for ids and in the import cache at
run-time, before we can do a string hash lookup in the property cache. Instead
we resolve final properties in the context and scope object at compile time and
look them up at run-time using their index instead. The dependencies to these
properties are also tracked separately and recorded in the compiled data.

This is merely the initial patch. There's a lot left to do, such as having
specialized getter and setters for specific property types. Setters are missing
altogether right now and will fall back to name lookup.

Change-Id: If3cb4e7c9454ef4850a615f0935b311c9395b165
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/src/qml/compiler/qv4compiler_p.h b/src/qml/compiler/qv4compiler_p.h
index 40b3fe25c0..6338babb5a 100644
--- a/src/qml/compiler/qv4compiler_p.h
+++ b/src/qml/compiler/qv4compiler_p.h
@@ -46,6 +46,8 @@
 
 QT_BEGIN_NAMESPACE
 
+class QQmlPropertyData;
+
 namespace QV4 {
 
 namespace CompiledData {
@@ -92,7 +94,13 @@ struct Q_QML_EXPORT JSUnitGenerator {
     QList<QList<CompiledData::JSClassMember> > jsClasses;
     uint jsClassDataSize;
     uint headerSize;
-    QHash<QQmlJS::V4IR::Function *, QSet<int> > qmlIdObjectDependenciesPerFunction;
+
+    typedef QHash<QQmlJS::V4IR::Function *, QSet<int> > IdDependencyHash;
+    IdDependencyHash qmlIdObjectDependenciesPerFunction;
+
+    typedef QHash<QQmlJS::V4IR::Function *, QSet<QQmlPropertyData*> > PropertyDependencyHash;
+    PropertyDependencyHash qmlContextPropertyDependenciesPerFunction;
+    PropertyDependencyHash qmlScopePropertyDependenciesPerFunction;
 };
 
 }