Something in cgraph appears to be relying on COMDAT support if
DECL_ONE_ONLY is available. This is the cause of the AIX bootstrap
failure due to recent tree-vrp.c change, earlier tree-ssa-sccvn.c
change. Also a recent C++ front-end change caused new libstdc++
testsuite failures that seems to have the same root cause.
This patch disables the ipa-comdats pass on targets that do not
support COMDAT groups.
Pre-approved by Richi.
PR bootstrap/78188
PR c++/71848
* ipa-comdats.c (pass_ipa_comdats::gate): Require HAVE_COMDAT_GROUP.
Index: ipa-comdats.c
===================================================================
--- ipa-comdats.c (revision 241862)
+++ ipa-comdats.c (working copy)
@@ -416,7 +416,7 @@ class pass_ipa_comdats : public ipa_opt_pass_d
bool
pass_ipa_comdats::gate (function *)
{
- return optimize;
+ return HAVE_COMDAT_GROUP && optimize;
}
} // anon namespace
