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-rw-r--r--gcc/cp/ChangeLog9
-rw-r--r--gcc/cp/class.c2
-rw-r--r--gcc/testsuite/ChangeLog8
-rw-r--r--gcc/testsuite/g++.dg/cpp0x/mutable1.C12
4 files changed, 31 insertions, 0 deletions
diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 070ea7ed2b3..1ce7773cf6d 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,12 @@
+2016-12-07 Jakub Jelinek <jakub@redhat.com>
+
+ Backported from mainline
+ 2016-09-16 Jakub Jelinek <jakub@redhat.com>
+
+ PR c++/77375
+ * class.c (check_bases): Set CLASSTYPE_HAS_MUTABLE if any
+ TYPE_HAS_MUTABLE_P for any bases.
+
2016-12-06 Jason Merrill <jason@redhat.com>
PR c++/71274
diff --git a/gcc/cp/class.c b/gcc/cp/class.c
index 3b4874a2c04..35deb1e99cd 100644
--- a/gcc/cp/class.c
+++ b/gcc/cp/class.c
@@ -1777,6 +1777,8 @@ check_bases (tree t,
SET_CLASSTYPE_REF_FIELDS_NEED_INIT
(t, CLASSTYPE_REF_FIELDS_NEED_INIT (t)
| CLASSTYPE_REF_FIELDS_NEED_INIT (basetype));
+ if (TYPE_HAS_MUTABLE_P (basetype))
+ CLASSTYPE_HAS_MUTABLE (t) = 1;
/* A standard-layout class is a class that:
...
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index c0737dad347..f077d2d6414 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2016-12-07 Jakub Jelinek <jakub@redhat.com>
+
+ Backported from mainline
+ 2016-09-16 Jakub Jelinek <jakub@redhat.com>
+
+ PR c++/77375
+ * g++.dg/cpp0x/mutable1.C: New test.
+
2016-12-07 Thomas Preud'homme <thomas.preudhomme@arm.com>
Backport from mainline
diff --git a/gcc/testsuite/g++.dg/cpp0x/mutable1.C b/gcc/testsuite/g++.dg/cpp0x/mutable1.C
new file mode 100644
index 00000000000..4dd37185d72
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/mutable1.C
@@ -0,0 +1,12 @@
+// PR c++/77375
+// { dg-do run { target c++11 } }
+
+struct Base { mutable int i; };
+struct Derived : Base {};
+const Derived foo{};
+
+int
+main ()
+{
+ foo.i = 42;
+}