[Bug ipa/102581] [12 Regression] ice in forced_merge, at ipa-modref-tree.h:352 with -fno-strict-aliasing and -O2

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102581

--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
git blame says:

f5ff3a8ed4ca (Jan Hubicka   2021-08-28 20:57:08 +0200  349)       /* We assume
that containment and lossless merging
f5ff3a8ed4ca (Jan Hubicka   2021-08-28 20:57:08 +0200  350)      was tested
earlier.  */
f5ff3a8ed4ca (Jan Hubicka   2021-08-28 20:57:08 +0200  351)      
gcc_checking_assert (!contains (a) && !a.contains (*this)
f5ff3a8ed4ca (Jan Hubicka   2021-08-28 20:57:08 +0200  352)                    
   && !merge (a, record_adjustments));

Adding Jan for his best advice.