https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78985
--- Comment #4 from rguenther at suse dot de <rguenther at suse dot de> --- 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.
