On Thu, Feb 27, 2014 at 11:02 AM, Jeff Law <l...@redhat.com> wrote: > > As discussed in 49847, a few years ago GCC was changed to add EH edges for > exceptions that might arise from a floating point comparison. That change > made it possible for a cc0-setter and cc0-user to end up in different > blocks, separated by a NOTE. > > After discussing reverting the change, duplicating the cc0-setter and a > couple other ideas, eventually Richi and myself settled on relaxing the long > standing restrictions on the relative locations of the cc0 setter and cc0 > user. > > We agreed to update the documentation and fault in fixes due to low priority > of cc0 targets (and doubly so since this really only affects cc0 targets > with used with non-call-exceptions). > > This patch updates the documentation and fixes the only known failure due to > this change in cse.c with a patch from Mikael. > > Tested with a cross compiler. I'll probably fire off a m68k bootstrap for > good measure, but it'll be several days before that completes. > > Installed on the trunk. > > Jeff > > diff --git a/gcc/ChangeLog b/gcc/ChangeLog > index 8a78716..a20cee3 100644 > --- a/gcc/ChangeLog > +++ b/gcc/ChangeLog > @@ -1,3 +1,12 @@ > +2014-02-27 Mikael Pettersson <mi...@it.uu.se> > + Jeff Law <l...@redhat.com> > + > + PR rtl-optimization/49847 > + * cse.c (fold_rtx) Handle case where cc0 setter and cc0 user > + are in different blocks. > + * doc/tm.texi (Condition Code Status): Update documention for > + relative locations of cc0-setter and cc0-user. > +
This breaks bootstrap: You should edit ../../src-trunk/gcc/doc/tm.texi.in rather than ../../src-trunk/gcc/doc/tm.texi . make[6]: *** [s-tm-texi] Error 1 make[6]: *** Waiting for unfinished jobs.... -- H.J.
