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, 24 insertions, 1 deletions

diff --git a/src/qml/compiler/qv4isel_moth.cpp b/src/qml/compiler/qv4isel_moth.cpp
index a2e702dac4..ca0977e057 100644
--- a/src/qml/compiler/qv4isel_moth.cpp
+++ b/src/qml/compiler/qv4isel_moth.cpp
@@ -456,12 +456,26 @@ void InstructionSelection::loadThisObject(V4IR::Temp *temp)
 
 void InstructionSelection::loadIdObject(int id, V4IR::Temp *temp)
 {
-    Instruction::LoadIdObject load;
+    Instruction::LoadQmlIdObject load;
     load.result = getResultParam(temp);
     load.id = id;
     addInstruction(load);
 }
 
+void InstructionSelection::loadQmlContextObject(V4IR::Temp *temp)
+{
+    Instruction::LoadQmlContextObject load;
+    load.result = getResultParam(temp);
+    addInstruction(load);
+}
+
+void InstructionSelection::loadQmlScopeObject(V4IR::Temp *temp)
+{
+    Instruction::LoadQmlScopeObject load;
+    load.result = getResultParam(temp);
+    addInstruction(load);
+}
+
 void InstructionSelection::loadConst(V4IR::Const *sourceConst, V4IR::Temp *targetTemp)
 {
     assert(sourceConst);
@@ -555,6 +569,15 @@ void InstructionSelection::setProperty(V4IR::Expr *source, V4IR::Expr *targetBas
     addInstruction(store);
 }
 
+void InstructionSelection::getQObjectProperty(V4IR::Expr *base, int propertyIndex, V4IR::Temp *target)
+{
+    Instruction::LoadQObjectProperty load;
+    load.base = getParam(base);
+    load.propertyIndex = propertyIndex;
+    load.result = getResultParam(target);
+    addInstruction(load);
+}
+
 void InstructionSelection::getElement(V4IR::Expr *base, V4IR::Expr *index, V4IR::Temp *target)
 {
     Instruction::LoadElement load;