https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83651
--- Comment #16 from rguenther at suse dot de <rguenther at suse dot de> --- On Fri, 19 Jan 2018, arnd at linaro dot org wrote: > 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. Ok, this is a bugfix and simply makes PRE do its job "properly" ...