------- Comment #19 from rguenther at suse dot de 2008-02-01 14:38 ------- Subject: Re: [4.3 Regression] gcc-4.3 generates wrong code on i386 with -O3
On Fri, 1 Feb 2008, stevenb dot gcc at gmail dot com wrote: > ------- Comment #18 from stevenb dot gcc at gmail dot com 2008-02-01 14:14 > ------- > Subject: Re: [4.3 Regression] gcc-4.3 generates wrong code on i386 with -O3 > > Why would we be calling expand_null_return to begin with, if there is > a proper return statement? No idea, we seem to add these clobbers unconditionally from expand_function_end. One fix is to teach postreload-gcse record_last_set_info about the other parts of the (clobber (reg:SC ax)) as it currently only sees ax. Micha has a patch for this (gcse.c looks similarly affected). Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35045
