https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83651
--- Comment #15 from Arnd Bergmann <arnd at linaro dot org> --- (In reply to rguent...@suse.de from comment #14) > Would be nice if somebody can bisect it. It doesn't look like a PRE > specific issue because there's no relevant PRE changes in the rev. range. > I can't reproduce the slowdown when comparing 7.1.0 against 7.2.0 > btw, so the regression must occur somewhere between 7.2.0 and now > (or 7.1.1 got faster for a few revs). I've checked r251376 (the one I mentioned in comment #11), and confirmed that this caused the difference between my old 7.1.1 and the current 7.2.1.