[Bug ipa/103246] [12 Regression] 416.gamess miscompare with -O2 -g -flto=auto since r12-5223-gecdf414bd89e6ba251f6b3f494407139b4dbae0e

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103246

--- Comment #19 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I was too optimistic - the patch does not help.

The problem is related to modref.  With lto-partition=max the problem triggers
while lto-partition=one hides it becuase late tree modref recomputes summaries
and after that things works as expected.  It may be wrong summary produced by
the ipa-modref and streamed to the ltrans or some TBAA related bug. Disabling
TBAA checks from the summary use makes the testcase to pass and there are some
TBAA violation warnings when linking. I am isolating the problematic
disambiguation.