https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89800
Eric Gallager <egallager at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2019-11-21 Ever confirmed|0 |1 --- Comment #1 from Eric Gallager <egallager at gcc dot gnu.org> --- Confirmed. Note that the warning only appears for the first testcase with -O2, -O3, or -Ofast, but not -O0, -O1, -Os, or -Og.