https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67002
--- Comment #8 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- (In reply to Kazumoto Kojima from comment #7) > A rare indeterminacy of the register choice. Both codes are valid. Ok, that's what I thought as well. > It seems very hard to find where has this indeterminacy come from. > Please follow Oleg's suggestion #c1. Since the patch mentioned in #c1 has already been committed, I'll just have to wait for Matthias to update the SVN revision of the gcc-5 branch in Debian. Maybe we can add gcc/real.o to the ignore list for the time being?