QML: Specialize bindings based on target property type.

When we can determine the type of a target property during type
compilation, we can skip a whole bunch of code that deals with
converting the result of a binding to the correct (target) type.

This removes 65 instructions on x86 for such typed bindings.

Change-Id: Id2c7c57b9ae6dfbeb921121beae9630604ca1d17
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 4 insertions, 3 deletions

diff --git a/src/quick/qtquick2.cpp b/src/quick/qtquick2.cpp
index 41e30a1110..bf5b0083e9 100644
--- a/src/quick/qtquick2.cpp
+++ b/src/quick/qtquick2.cpp
@@ -136,9 +136,10 @@ void QQmlQtQuick2DebugStatesDelegate::updateBinding(QQmlContext *context,
 
                 QQmlBinding *newBinding = 0;
                 if (!isLiteralValue) {
-                    newBinding = new QQmlBinding(expression.toString(), object,
-                                                 QQmlContextData::get(context), fileName,
-                                                 line, column);
+                    newBinding = QQmlBinding::create(&QQmlPropertyPrivate::get(property)->core,
+                                                     expression.toString(), object,
+                                                     QQmlContextData::get(context), fileName,
+                                                     line, column);
                     newBinding->setTarget(property);
                 }