------- Comment #172 from rguenther at suse dot de 2007-06-08 13:47 ------- Subject: Re: [4.0/4.1/4.2/4.3 Regression] placement new does not change the dynamic type as it should
On Fri, 8 Jun 2007, ian at airs dot com wrote: > > > ------- Comment #171 from ian at airs dot com 2007-06-08 07:49 ------- > Created an attachment (id=13666) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13666&action=view) > --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13666&action=view) > Patch > > This variant of the previous patch does better on at least some of the tramp3d > functions. Here we eliminate the CHANGE_DYNAMIC_TYPE_EXPR nodes during the > first aliasing pass, which prevents them from retaining references to local > variables and generally clogging up optimizations. Quick testing shows that this patch indeed shows better performance. I'll give it complete testing coverage tonight. Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29286
