[Bug fortran/64244] [4.8/4.9/5 Regression] ICE at class.c:236 when using non_overridable

["ondrej.certik at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64244

--- Comment #11 from Ondřej Čertík <ondrej.certik at gmail dot com> ---
On Tue, Dec 16, 2014 at 9:47 AM, janus at gcc dot gnu.org
<gcc-bugzilla@gcc.gnu.org> wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64244
>
> --- Comment #10 from janus at gcc dot gnu.org ---
> (In reply to Ondřej Čertík from comment #9)
>> Janus, thanks a lot for fixing this!
>
> You're welcome!
>
>
>> Yes, it's part of a large code base. I'll try the trunk soon.
>
> That would be great. Since this bug is a regression, I plan to backport the fix
> to the 4.8 and 4.9 branches. But before that it would be good to make sure that
> no further problems appear. I think the NON_OVERRIDABLE attribute is not
> incredibly well-tested at this point.

I can compile 4.9.2 from source without problems, but when I follow
the same procedure with the latest trunk (I used:
https://github.com/gcc-mirror/gcc), I get:

https://gist.github.com/certik/bbb96383e540efc8d6a3

And the part of config.log says:

https://gist.github.com/certik/a308dbc6a26d12888ee6

i.e. the relevant error seems to be:

/usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.15' not found

So my system (RHEL6) libstdc++ library might be incompatible with the
trunk, but I don't see why gcc couldn't compile. Any ideas how to fix
this?
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Subject: [Bug ipa/63851] [5 Regression] ipa-icf miscompiles gfortran.dg/assumed_rank_(8|9|10).f90 at -O2 and above
Date: Tue, 16 Dec 2014 17:26:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63851

--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Yes, IPA ICF should respect 'restrict' attribute.
May I ask you to rerun test suite with applied:

diff --git a/gcc/ipa-icf-gimple.c b/gcc/ipa-icf-gimple.c
index ec0290a..98f38ee 100644
--- a/gcc/ipa-icf-gimple.c
+++ b/gcc/ipa-icf-gimple.c
@@ -185,6 +185,9 @@ bool func_checker::compatible_types_p (tree t1, tree t2,
   if (TREE_CODE (t1) != TREE_CODE (t2))
     return return_false_with_msg ("different tree types");

+  if (TYPE_RESTRICT (t1) != TYPE_RESTRICT (t2))
+    return return_false_with_msg ("restrict flags are different");
+
   if (!types_compatible_p (t1, t2))
     return return_false_with_msg ("types are not compatible");

Thanks,
Martin
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Subject: [Bug sanitizer/61591] Undefined behavior sanitizer does not catch builtin_unreachable's from impossible devirtualization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ida591

--- Comment #10 from Martin Jambor <jamborm at gcc dot gnu.org> ---
Honza, given what you wrote in

https://gcc.gnu.org/ml/gcc-patches/2014-12/msg01033.html

do you want to take over this bug?