[Bug middle-end/90796] [8/9/10 Regression] GCC: O2 vs O3 output differs on simple test

[matz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90796

--- Comment #5 from Michael Matz <matz at gcc dot gnu.org> ---
FWIW, the reduced testcase from comment #3 is wrong.  Even with -O0 or with gcc
4.3 or 6 I get:

b:48
Aborted (core dumped)


But I can reproduce the problem with the original testcase.