On 14/08/13 01:40, Ryan Hill wrote: > On Tue, 13 Aug 2013 07:13:13 +0200 > Luca Barbato <lu_z...@gentoo.org> wrote: > >> On 13/08/13 03:41, Ryan Hill wrote: >>> I don't see any reason to keep this masked other than bug #416069, which >>> needs to be fixed anyways. How does Friday sound? >>> >>> https://bugs.gentoo.org/416069 xorg-2.eclass: add >>> --disable-selective-werror to configure https://bugs.gentoo.org/461954 GCC >>> 4.8 porting >> >> gcc-4.8 can miscompile libc >> >> http://gcc.gnu.org/bugzilla//show_bug.cgi?id=56888 >> >> We should make sure we do not get bitten by this. > > We don't build glibc with -O3. Other libc's should either not use -O3 or > use -fno-tree-loop-distribute-patterns where applicable. >
On certain arches the memcpy tranformation happens even on lower optimization levels or so I saw reported. lu
