https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86313
Dominique d'Humieres <dominiq at lps dot ens.fr> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P3 |P5 Status|UNCONFIRMED |WAITING Last reconfirmed| |2018-06-25 Ever confirmed|0 |1 Severity|normal |enhancement --- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > Forgot to mention: This one occurs only with -O1 and above. There is no warning with -fno-frontend-optimize. This looks like a duplicate of pr48655. As suggested in comment 1, it should be enough to improve the documentation.