On Thu, Jan 11, 2007 at 08:06:31PM -0500, Daniel Berlin wrote: > On 1/11/07, Grigory Zagorodnev <[EMAIL PROTECTED]> wrote: > >Menezes, Evandro wrote: > >> Though not as pronounced, definitely significant. > >> > > > >Using binary search I've detected that 30% performance regression of > >cpu2006/437.leslie3d benchmark is caused by revision 117891. > > > >http://gcc.gnu.org/viewcvs?view=rev&revision=117891 > > > >I assume same commit causes regression of all other benchmarks from > >cpu2k6 suite (running others to confirm). > > This only affects 4.2, and the only solution would be to try to > backport some of the 4.3 aliasing stuff to 4.2, which i'm not sure is > a great idea. >
If this serious performance in gcc 4.2 isn't addressed, it may make gcc 4.2 less attractive since it may generate much slower executables. H.J.
