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, 19 insertions, 0 deletions

diff --git a/src/qml/compiler/qv4regalloc.cpp b/src/qml/compiler/qv4regalloc.cpp
index e2d627b809..84efdbb920 100644
--- a/src/qml/compiler/qv4regalloc.cpp
+++ b/src/qml/compiler/qv4regalloc.cpp
@@ -340,6 +340,18 @@ protected: // IRDecoder
         addCall();
     }
 
+    virtual void loadQmlContextObject(Temp *temp)
+    {
+        addDef(temp);
+        addCall();
+    }
+
+    virtual void loadQmlScopeObject(Temp *temp)
+    {
+        addDef(temp);
+        addCall();
+    }
+
     virtual void loadConst(V4IR::Const *sourceConst, V4IR::Temp *targetTemp)
     {
         addDef(targetTemp);
@@ -388,6 +400,13 @@ protected: // IRDecoder
         addCall();
     }
 
+    virtual void getQObjectProperty(V4IR::Expr *base, int /*propertyIndex*/, V4IR::Temp *target)
+    {
+        addDef(target);
+        addUses(base->asTemp(), Use::CouldHaveRegister);
+        addCall();
+    }
+
     virtual void getElement(V4IR::Expr *base, V4IR::Expr *index, V4IR::Temp *target)
     {
         addDef(target);