* expr.c (expand_expr) [ADDR_EXPR]: Disallow taking the address of
an unaligned member of TREE_ADDRESSABLE type.
* cp/typeck.c (build_class_member_access_expr): Compare
TYPE_MAIN_VARIANTs.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@64523
138bc75d-0d04-0410-961f-
82ee72b054a4
--- /dev/null
+// PR c++/10091
+
+// Bug: We were dying because in general, B::a doesn't have enough
+// alignment for us to take its address. But if the B is C::b, it does
+// have enough alignment, and we should be able to determine that.
+
+// This only failed on STRICT_ALIGNMENT targets (i.e. not i686)
+
+struct A {
+ int i;
+
+ A();
+ A(const A&);
+ A& operator=(const A&);
+};
+
+struct B {
+ A a;
+} __attribute__ ((packed));
+
+struct C {
+ B b;
+ int j;
+};
+
+void f (const A&);
+void g (const C& c)
+{
+ f (c.b.a);
+}