Save another 4/8 bytes per QQmlBoundSignalExpression

We can move the persistent to hold the scope for a string compiled binding into
the extra data.

Change-Id: I033aa6d080402a1eb19cdae540f9af2c5c3a3fc7
Reviewed-by: Michael Brasser <michael.brasser@live.com>
Optimize construct calls

Optimize construction of the internalClass for the object
being constructed.

Change-Id: Id5fc02c291664ec01c3595ae0acbb6895cc5b147
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Don't use scopes in the instanceOf operator

There's no need to use scopes here, as instanceof can't
trigger any calls into the memorymanager. This slightly
speeds up the code.

Change-Id: Ie7f5c8f3982df1e24d21cfc4e0841d479a75c664
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Optimize ExecutionContext::setProperty

Optimize the code in case the setProperty call tries to
set something in the activation. Avoid resolving the property
index twice.

Change-Id: I60a4535adc014f7118bc3ab6773e10ed688ca0d6
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Get rid of collectDeletables

The method is only required for the QObjectWrapper, but
there we can instead simply register the deletable in the
destroy method.

Change-Id: I944319d327859cce33ac31a174e8d56fc4babfc1
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Remove the scribble option from the memory manager

This option doesn't make sense anymore, as we memset the object to
0 on destruction anyway.

Change-Id: Ie40563394f9cacda1b35fde114c9a6043f53d460
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Fix instantiation of QML list models with custom object properties

When doing something like

    property Item blah: Item { ... }

in a list model, we would erroneously pass "blah" to the custom parser of the
list model, which is wrong as the binding to blah is on an existing property
(not custom). For regular properties there's a code path in place to avoid
passing this to the custom parser, but for sub-object bindings we'd
unconditionally register it with the custom parser. This patch corrects that
and also adds a unit test to verify that we don't pass any bindings to existing
properties to the custom parser.

Task-number: QTBUG-37795
Change-Id: I1a3091fb5fad4be08b577cf74a85f24c3ab62ef4
Reviewed-by: Lars Knoll <lars.knoll@digia.com>