PR c++/71528
* decl.c (duplicate_decls): For DECL_INITIALIZED_P non-external
olddecl vars, preserve their TREE_READONLY bit.
* g++.dg/opt/pr71528.C: New test.
From-SVN: r237458
2016-06-14 Jakub Jelinek <jakub@redhat.com>
2016-06-14 Jakub Jelinek <jakub@redhat.com>
+ PR c++/71528
+ * decl.c (duplicate_decls): For DECL_INITIALIZED_P non-external
+ olddecl vars, preserve their TREE_READONLY bit.
+
PR c++/71516
* decl.c (complete_vars): Handle gracefully type == error_mark_node.
PR c++/71516
* decl.c (complete_vars): Handle gracefully type == error_mark_node.
if (VAR_P (newdecl))
{
DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
if (VAR_P (newdecl))
{
DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
+ /* For already initialized vars, TREE_READONLY could have been
+ cleared in cp_finish_decl, because the var needs runtime
+ initialization or destruction. Make sure not to set
+ TREE_READONLY on it again. */
+ if (DECL_INITIALIZED_P (olddecl)
+ && !DECL_EXTERNAL (olddecl)
+ && !TREE_READONLY (olddecl))
+ TREE_READONLY (newdecl) = 0;
DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
|= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
|= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
2016-06-14 Jakub Jelinek <jakub@redhat.com>
2016-06-14 Jakub Jelinek <jakub@redhat.com>
+ PR c++/71528
+ * g++.dg/opt/pr71528.C: New test.
+
PR c++/71516
* g++.dg/init/pr71516.C: New test.
PR c++/71516
* g++.dg/init/pr71516.C: New test.
--- /dev/null
+// PR c++/71528
+// { dg-do run }
+// { dg-options "-O2" }
+
+extern int &x;
+int y;
+
+int &
+foo ()
+{
+ return y;
+}
+
+int &x = foo ();
+
+int
+main ()
+{
+ if (&x != &y)
+ __builtin_abort ();
+}
+
+extern int &x;