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[Bug c++/71918] Internal compiler error: Illegal instruction
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 19 Jul 2016 07:39:13 +0000
- Subject: [Bug c++/71918] Internal compiler error: Illegal instruction
- Auto-submitted: auto-generated
- References: <bug-71918-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71918
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Markus Trippelsdorf from comment #11)
> The issue can be fixed by a microcode/bios update.
> So it is clearly an Intel bug and I don't think anything should change for
> gcc.
The wrong cpuid reporting sure. What I meant was that there are still CPUs
that claim to be Haswell or Skylake, yet they don't support the ISAs GCC
includes under the corresponding -march= option. Looking in detail on the
Skylake based Pentium or Celeron, they don't even have AVX, so clearly users
just must not consider them anything more than a mere westmere or something
similar.