The problem in this testcase is that we inlined the decloned constructor
into the calling thunks, so it was removed by
symtab_remove_unreachable_nodes. verify_symtab sees that it is no
longer linked to the calling thunks with same_comdat_group and complains.
Here I've changed verify_symtab to only look at TREE_PUBLIC decls, since
comdat-local symbols can be removed if they aren't needed. I also
adjusted the diagnostic so it would print the two symbols in question
rather than the same one twice. :)
OK for trunk?
commit e29dc7a675fdbc1adce40908fda4d5408f0103a0
Author: Jason Merrill <ja...@redhat.com>
Date: Mon Jul 14 16:58:57 2014 -0400
PR c++/61623
* symtab.c (verify_symtab): Don't worry about comdat-internal
symbols.
diff --git a/gcc/symtab.c b/gcc/symtab.c
index 3a59935..dc4d84d 100644
--- a/gcc/symtab.c
+++ b/gcc/symtab.c
@@ -1202,7 +1202,8 @@ verify_symtab (void)
FOR_EACH_SYMBOL (node)
{
verify_symtab_node (node);
- if (node->get_comdat_group ())
+ if (node->get_comdat_group ()
+ && TREE_PUBLIC (node->decl))
{
symtab_node **entry, *s;
bool existed;
@@ -1217,7 +1218,7 @@ verify_symtab (void)
{
error ("Two symbols with same comdat_group are not linked by the same_comdat_group list.");
dump_symtab_node (stderr, *entry);
- dump_symtab_node (stderr, s);
+ dump_symtab_node (stderr, node);
internal_error ("verify_symtab failed");
}
}
diff --git a/gcc/testsuite/g++.dg/opt/declone2.C b/gcc/testsuite/g++.dg/opt/declone2.C
new file mode 100644
index 0000000..e725d8e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/declone2.C
@@ -0,0 +1,10 @@
+// PR c++/61623
+// { dg-options "-Os" }
+
+struct C {};
+struct B : virtual C {};
+struct A : B {
+ A (int) {}
+};
+
+A a (0);
