https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87984
Alexander Monakov <amonakov at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Last reconfirmed| |2018-11-12 Resolution|INVALID |--- Ever confirmed|0 |1 --- Comment #3 from Alexander Monakov <amonakov at gcc dot gnu.org> --- Reopening - please read the testcase in detail. Neither the 'a' nor the 'd' input are clobbered in the original code, which uses a temporary ('t') as recommended by the docs.