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, 15 insertions, 0 deletions

diff --git a/src/qml/compiler/qv4isel_masm.cpp b/src/qml/compiler/qv4isel_masm.cpp
index 1f00af3972..a012273c12 100644
--- a/src/qml/compiler/qv4isel_masm.cpp
+++ b/src/qml/compiler/qv4isel_masm.cpp
@@ -953,6 +953,16 @@ void InstructionSelection::loadIdObject(int id, V4IR::Temp *temp)
     generateFunctionCall(temp, __qmljs_get_id_object, Assembler::ContextRegister, Assembler::TrustedImm32(id));
 }
 
+void InstructionSelection::loadQmlContextObject(V4IR::Temp *temp)
+{
+    generateFunctionCall(temp, __qmljs_get_context_object, Assembler::ContextRegister);
+}
+
+void InstructionSelection::loadQmlScopeObject(V4IR::Temp *temp)
+{
+    generateFunctionCall(temp, __qmljs_get_scope_object, Assembler::ContextRegister);
+}
+
 void InstructionSelection::loadConst(V4IR::Const *sourceConst, V4IR::Temp *targetTemp)
 {
     if (targetTemp->kind == V4IR::Temp::PhysicalRegister) {
@@ -1031,6 +1041,11 @@ void InstructionSelection::getProperty(V4IR::Expr *base, const QString &name, V4
     }
 }
 
+void InstructionSelection::getQObjectProperty(V4IR::Expr *base, int propertyIndex, V4IR::Temp *target)
+{
+    generateFunctionCall(target, __qmljs_get_qobject_property, Assembler::ContextRegister, Assembler::PointerToValue(base), Assembler::TrustedImm32(propertyIndex));
+}
+
 void InstructionSelection::setProperty(V4IR::Expr *source, V4IR::Expr *targetBase,
                                        const QString &targetName)
 {