QML: Port QV4::CompiledData::RegExp to new special integer bitfield

Task-number: QTBUG-99545
Change-Id: I37be080387bf086d84761b056140cc5a99d161ed
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Sami Shalayel <sami.shalayel@qt.io>
(cherry picked from commit da09f7c3d8962b4521189c96adf1ed0e1da3e8dd)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 14 insertions, 6 deletions

diff --git a/src/qml/common/qv4compileddata_p.h b/src/qml/common/qv4compileddata_p.h
index bb4ec86545..c5a80848b3 100644
--- a/src/qml/common/qv4compileddata_p.h
+++ b/src/qml/common/qv4compileddata_p.h
@@ -168,13 +168,21 @@ struct RegExp
         RegExp_Unicode    = 0x08,
         RegExp_Sticky     = 0x10
     };
-    union {
-        quint32 _dummy;
-        quint32_le_bitfield<0, 5> flags;
-        quint32_le_bitfield<5, 27> stringIndex;
-    };
 
-    RegExp() : _dummy(0) { }
+    RegExp() : m_data(QSpecialIntegerBitfieldZero) {}
+    RegExp(quint32 flags, quint32 stringIndex)
+    {
+        m_data.set<FlagsField>(flags);
+        m_data.set<StringIndexField>(stringIndex);
+    }
+
+    quint32 flags() const { return m_data.get<FlagsField>(); }
+    quint32 stringIndex() const { return m_data.get<StringIndexField>(); }
+
+private:
+    using FlagsField = quint32_le_bitfield_member<0, 5>;
+    using StringIndexField = quint32_le_bitfield_member<5, 27>;
+    quint32_le_bitfield_union<FlagsField, StringIndexField> m_data;
 };
 static_assert(sizeof(RegExp) == 4, "RegExp structure needs to have the expected size to be binary compatible on disk when generated by host compiler and loaded by target");