------- Comment #17 from rguenther at suse dot de 2008-01-06 22:12 ------- Subject: Re: Fortran FE generated IL pessimizes middle-end IL and analysis
On Sun, 6 Jan 2008, jaydub66 at gmail dot com wrote: > ------- Comment #16 from jaydub66 at gmail dot com 2008-01-06 22:08 ------- > I've done some experimenting with older GCC versions I have floating around on > my machines: > > Compiling the test case with both 4.1.2 and 4.2.1 gives an ICE, so I guess we > can't exactly call this a regression. > > But then compiling with older 4.3 trunk builds works much better: > I have a version from August 24 of last year, which runs the test case at full > -O3 in a perfect 8sec, with 32MB memory usage (that is with > --enable-checking=release). And I have two other builds from October 8 and > November 9, which both run the test case in about 38s with 85MB mem-usage > (they > are built with --enable-checking=debug, so this is probably just debugging > overhead). At least none of them takes the crazy 800MB of recent builds. > > To sum up: It seems like trunk versions up to at least November 9 seem to work > fine on this test case. Well, we know what introduced this regression on the trunk. It was the fix for PR33870. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34683