diff --git a/cfg/qt.cfg b/cfg/qt.cfg
index 42c7ca41bbe..2ef1093c17f 100644
--- a/cfg/qt.cfg
+++ b/cfg/qt.cfg
@@ -63,6 +63,7 @@
   <define name="SLOT(X)" value="#X"/>
   <!-- T qAbs(const T &t) -->
   <function name="qAbs">
+    <pure/>
     <noreturn>false</noreturn>
     <use-retval/>
     <arg nr="1" direction="in">
@@ -101,6 +102,7 @@
   <!-- quint32 qFloatDistance(float a, float b) -->
   <!-- quint64 qFloatDistance(double a, double b) -->
   <function name="qFloatDistance">
+    <pure/>
     <noreturn>false</noreturn>
     <use-retval/>
     <leak-ignore/>
@@ -132,6 +134,7 @@
   <!-- bool qFuzzyCompare(double p1, double p2) -->
   <!-- bool qFuzzyCompare(float p1, float p2) -->
   <function name="qFuzzyCompare">
+    <pure/>
     <noreturn>false</noreturn>
     <returnValue type="bool"/>
     <use-retval/>
@@ -147,6 +150,7 @@
   <!-- bool qFuzzyIsNull(double d) -->
   <!-- bool qFuzzyIsNull(float f) -->
   <function name="qFuzzyIsNull">
+    <pure/>
     <noreturn>false</noreturn>
     <returnValue type="bool"/>
     <use-retval/>
@@ -177,6 +181,7 @@
   <!-- bool	qIsFinite(double d) -->
   <!-- bool qIsFinite(float f) -->
   <function name="qIsFinite">
+    <pure/>
     <noreturn>false</noreturn>
     <returnValue type="bool"/>
     <use-retval/>
@@ -189,6 +194,7 @@
   <!-- bool qIsInf(double d) -->
   <!-- bool qIsInf(float f) -->
   <function name="qIsInf">
+    <pure/>
     <noreturn>false</noreturn>
     <returnValue type="bool"/>
     <use-retval/>
@@ -201,6 +207,7 @@
   <!-- bool qIsNaN(double d) -->
   <!-- bool qIsNaN(float f) -->
   <function name="qIsNaN">
+    <pure/>
     <noreturn>false</noreturn>
     <returnValue type="bool"/>
     <use-retval/>
@@ -267,6 +274,7 @@
   <!-- int qRound(double d) -->
   <!-- int qRound(float d) -->
   <function name="qRound">
+    <pure/>
     <noreturn>false</noreturn>
     <returnValue type="int"/>
     <use-retval/>
@@ -278,6 +286,7 @@
   <!-- qint64 qRound64(double d) -->
   <!-- qint64 qRound64(float d) -->
   <function name="qRound64">
+    <pure/>
     <noreturn>false</noreturn>
     <returnValue type="qint64"/>
     <use-retval/>
@@ -780,7 +789,7 @@
   <function name="QList::append,QStringList::append">
     <noreturn>false</noreturn>
     <returnValue type="void"/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -1604,7 +1613,7 @@
   <function name="QList::prepend,QStringList::prepend">
     <noreturn>false</noreturn>
     <returnValue type="void"/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -1628,7 +1637,7 @@
   <function name="QList::push_back,QStringList::push_back">
     <noreturn>false</noreturn>
     <returnValue type="void"/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -1646,7 +1655,7 @@
   <function name="QList::push_front,QStringList::push_front">
     <noreturn>false</noreturn>
     <returnValue type="void"/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -1709,7 +1718,7 @@
   <function name="QList::removeAll,QStringList::removeAll">
     <noreturn>false</noreturn>
     <returnValue type="int"/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -2599,7 +2608,7 @@
   <function name="QBoxLayout::addWidget,QVBoxLayout::addWidget,QHBoxLayout::addWidget">
     <noreturn>false</noreturn>
     <returnValue type="void"/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
     <arg nr="2" default="0" direction="in">
@@ -4185,7 +4194,7 @@
     <noreturn>false</noreturn>
     <returnValue type="void"/>
     <leak-ignore/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4207,7 +4216,7 @@
     <use-retval/>
     <leak-ignore/>
     <const/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4229,14 +4238,14 @@
     <returnValue type="bool"/>
     <use-retval/>
     <const/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
   <!-- QVector<T> &QVector::fill(const T &value, int size = ...) -->
   <function name="QVector::fill,QStack::fill">
     <noreturn>false</noreturn>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
     <arg nr="2" direction="in" default="-1">
@@ -4251,7 +4260,7 @@
     <use-retval/>
     <leak-ignore/>
     <const/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
     <arg nr="2" direction="in" default="">
@@ -4264,13 +4273,13 @@
   <function name="QVector::insert,QStack::insert">
     <noreturn>false</noreturn>
     <leak-ignore/>
-    <arg nr="1">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
     <arg nr="2" direction="in">
       <not-uninit/>
     </arg>
-    <arg nr="3" direction="in">
+    <arg nr="3" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4281,7 +4290,7 @@
     <use-retval/>
     <leak-ignore/>
     <const/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
     <arg nr="2" direction="in" default="-1">
@@ -4295,7 +4304,7 @@
     <noreturn>false</noreturn>
     <returnValue type="void"/>
     <leak-ignore/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4317,7 +4326,7 @@
   <function name="QVector::removeAll,QStack::removeAll">
     <noreturn>false</noreturn>
     <returnValue type="int"/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4337,7 +4346,7 @@
       <not-uninit/>
       <valid>0:</valid>
     </arg>
-    <arg nr="2" direction="in">
+    <arg nr="2" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4376,7 +4385,7 @@
     <use-retval/>
     <leak-ignore/>
     <const/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4437,7 +4446,7 @@
     <noreturn>false</noreturn>
     <returnValue type="void"/>
     <leak-ignore/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4448,7 +4457,7 @@
     <returnValue type="int"/>
     <use-retval/>
     <const/>
-    <arg nr="1" direction="in" default="">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4459,7 +4468,7 @@
     <use-retval/>
     <leak-ignore/>
     <const/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
@@ -4488,7 +4497,7 @@
     <use-retval/>
     <leak-ignore/>
     <const/>
-    <arg nr="1" direction="in">
+    <arg nr="1" direction="in" indirect="0">
       <not-uninit/>
     </arg>
   </function>
diff --git a/test/cfg/qt.cpp b/test/cfg/qt.cpp
index f77ea2e88ba..a78e5d67996 100644
--- a/test/cfg/qt.cpp
+++ b/test/cfg/qt.cpp
@@ -785,3 +785,8 @@ void unreadVariable_QMapIterator(QMap<QString, QObject*>& m)
         it.value() = new QObject();
     }
 }
+
+void constVariablePointer_QVector(QVector<int*>& qv, int* p)
+{
+    qv.push_back(p); // #12661
+}