[Bug bootstrap/78985] [7 Regression] profiledbootstrap failure by -Wuninitialized

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78985

--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #4)
> On Fri, 20 Jan 2017, marxin at gcc dot gnu.org wrote:
> 
> > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78985
> > 
> > Martin Liška <marxin at gcc dot gnu.org> changed:
> > 
> >            What    |Removed                     |Added
> > ----------------------------------------------------------------------------
> >              Status|UNCONFIRMED                 |NEW
> >    Last reconfirmed|                            |2017-01-20
> >            Assignee|unassigned at gcc dot gnu.org      |marxin at gcc dot gnu.org
> >      Ever confirmed|0                           |1
> > 
> > --- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
> > I'll try to bisect that, on aarch64 machine I see:
> > 
> > ../../gcc/config/aarch64/cortex-a57-fma-steering.c: In member function ‘void
> > func_fma_steering::analyze()’:
> > ../../gcc/config/aarch64/cortex-a57-fma-steering.c:979:53: error: ‘head’ may be
> > used uninitialized in this function [-Werror=maybe-uninitialized]
> >     this->analyze_fma_fmul_insn (forest, chain, head);
> >                                                      ^
> > ../../gcc/config/aarch64/cortex-a57-fma-steering.c:979:53: error: ‘forest’ may
> > be used uninitialized in this function [-Werror=maybe-uninitialized]
> > ../../gcc/config/aarch64/cortex-a57-fma-steering.c:979:53: error: ‘chain’ may
> > be used uninitialized in this function [-Werror=maybe-uninitialized]
> > 
> > I'll try to bisect..
> 
> Yes, aarch64 has a similar issue.

This is aarch64 machine :) Do you remember whether profiledbootstrap used to
succeed (for bisect start)?