https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65263
--- Comment #5 from Jan Hubicka <hubicka at ucw dot cz> ---
Hi,
the following (untested) patch should prevent redirection to happen.
Index: ipa-icf.c
===================================================================
--- ipa-icf.c (revision 221096)
+++ ipa-icf.c (working copy)
@@ -697,12 +697,22 @@ redirect_all_callers (cgraph_node *n, cg
{
int nredirected = 0;
ipa_ref *ref;
+ cgraph_edge *e = n->callers;
- while (n->callers)
+ while (e)
{
- cgraph_edge *e = n->callers;
- e->redirect_callee (to);
- nredirected++;
+ /* Redirecting thunks to interposable symbols or symbols in other
sections
+ may not be supported by target output code. Play safe for now and
+ punt on redirection. */
+ if (!e->caller->thunk.thunk_p)
+ {
+ struct cgraph_edge *nexte = e->next_callee;
+ e->redirect_callee (to);
+ e = nexte;
+ nredirected++;
+ }
+ else
+ e = e->next_callee;
}
for (unsigned i = 0; n->iterate_direct_aliases (i, ref);)
{
@@ -726,6 +736,17 @@ redirect_all_callers (cgraph_node *n, cg
return nredirected;
}
+/* Return true if NODE has thunk. */
+
+bool
+has_thunk_p (cgraph_node *node, void *)
+{
+ for (cgraph_edge *e = node->callers; e; e = e->next_caller)
+ if (e->caller->thunk.thunk_p)
+ return true;
+ return false;
+}
+
/* Merges instance with an ALIAS_ITEM, where alias, thunk or redirection can
be applied. */
@@ -907,6 +928,7 @@ sem_function::merge (sem_item *alias_ite
return false;
}
if (!create_wrapper
+ && !alias->call_for_symbol_and_aliases (has_thunk_p, NULL, true)
&& !alias->can_remove_if_no_direct_calls_p ())
{
if (dump_file)
