[Bug ipa/58862] [4.9 Regression] LTO profiledbootstrap failure: lto1: ICE in edge_badness, at ipa-inline.c:1008

["tejohnson at google dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58862

--- Comment #11 from Teresa Johnson <tejohnson at google dot com> ---
On Fri, Nov 1, 2013 at 10:14 AM, Teresa Johnson <tejohnson@google.com> wrote:
> On Fri, Nov 1, 2013 at 10:01 AM, paulo@matos-sorge.com
> <gcc-bugzilla@gcc.gnu.org> wrote:
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58862
>>
>> --- Comment #9 from Paulo J. Matos <paulo@matos-sorge.com> ---
>> I didn't manage to reproduce the bug yet. With the git sha before my commit
>> 4bc0f16, I get the following on a profiledbootstrap on x64:
>>
>> insn-opinit.c: In function 'void init_all_optabs(target_optabs*)':
>> insn-opinit.c:1234:1: error: verify_flow_info: Wrong probability of edge
>> 1437->2606 66380
>>  init_all_optabs (struct target_optabs *optabs)
>>  ^
>> insn-opinit.c:1234:1: error: verify_flow_info: Wrong probability of edge
>> 1427->2598 66380
>> insn-opinit.c:1234:1: internal compiler error: verify_flow_info failed
>> Please submit a full bug report,
>> with preprocessed source if appropriate.
>> See <http://gcc.gnu.org/bugs.html> for instructions.
>
> The above was introduced by r203823, and fixed by r204178. Doesn't
> show up with a normal profiledbootstrap, but apparently does with an
> lto-profiledbootstrap (going by the above report, haven't confirmed
> this myself).

On re-reading this I wasn't very clear. I mean that the current
failure on edge badness doesn't show up with a normal
profiledbootstrap, but apparently does with an lto-profiledbootstrap
(going by the above report, haven't confirmed this myself).

The probability issue occurred even with a normal profiledbootstrap,
but is fixed now.

Teresa

>
> Thanks,
> Teresa
>
>>
>> Unfortunately running one of these takes a long time so it's a slow process to
>> check it out since as far as I am aware it's not possible to use a parallel
>> build. Do let me know if there's a fast way to build it.
>>
>> I will keep investigating.
>>
>> --
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>
>
>
> --
> Teresa Johnson | Software Engineer | tejohnson@google.com | 408-460-2413