https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63892
--- Comment #20 from Iain Sandoe <iains at gcc dot gnu.org> ---
testing:
diff --git a/gcc/ipa-icf.c b/gcc/ipa-icf.c
index e1af8bf..4d72e42 100644
--- a/gcc/ipa-icf.c
+++ b/gcc/ipa-icf.c
@@ -660,7 +660,8 @@ sem_function::merge (sem_item *alias_item)
/* When both alias and original are not overwritable, we can save
the extra thunk wrapper for direct calls. */
redirect_callers
- = (!original_discardable
+ = (alias->callers
+ && !original_discardable
&& !DECL_COMDAT_GROUP (alias->decl)
&& alias->get_availability () > AVAIL_INTERPOSABLE
&& original->get_availability () > AVAIL_INTERPOSABLE
@@ -724,7 +725,7 @@ sem_function::merge (sem_item *alias_item)
/* The alias function is removed if symbol address
does not matter. */
- if (!alias_address_matters)
+ if (!alias_address_matters && alias->ref_list.referring.is_empty())
alias->remove ();
if (dump_file && redirected)
