[Bug bootstrap/51036] New: [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[Bug bootstrap/51036] New: [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51036

             Bug #: 51036
           Summary: [4.7 Regression] LTO bootstrap failed with
                    bootstrap-profiled
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


On Linux/x86-64, revision 181119 failed to bootstrap with
--with-build-config=bootstrap-lto and "make profiledbootstrap":

../../src/gcc/c-parser.c: In function ‘c_parser_binary_expression(c_parser*,
c_expr*, c_parser_prec)’:
../../src/gcc/c-parser.c:5729:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[4]: *** [c-parser.o] Error 1

Revision 181107 is OK.

[Bug bootstrap/51036] [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51036

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dodji at gcc dot gnu.org
   Target Milestone|---                         |4.7.0

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> 2011-11-08 19:46:28 UTC ---
It is caused by revision 181118:

http://gcc.gnu.org/ml/gcc-cvs/2011-11/msg00406.html

[Bug bootstrap/51036] [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[dodji at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51036

--- Comment #2 from Dodji Seketeli <dodji at gcc dot gnu.org> 2011-11-14 14:21:17 UTC ---
Hmm, it looks like I can't reproduce this anymore with r181280 on trunk.

Are you still seeing it?

[Bug bootstrap/51036] [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51036

--- Comment #3 from Uros Bizjak <ubizjak at gmail dot com> 2011-11-14 14:32:00 UTC ---
(In reply to comment #2)
> Hmm, it looks like I can't reproduce this anymore with r181280 on trunk.
> 
> Are you still seeing it?

No, due to [1]. But - isn't this patch just papering over real problem?

[1] http://gcc.gnu.org/ml/gcc-patches/2011-11/msg01631.html

[Bug bootstrap/51036] [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[dodji at seketeli dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51036

--- Comment #4 from dodji at seketeli dot org <dodji at seketeli dot org> 2011-11-14 15:21:50 UTC ---
Interesting.  In any case, I hardly find this issue related to my patch,
like what H.J.'s bissecting (thanks for that H.J. by the way!) is
suggesting.  So a memory management issue might very well explain it,
then.

[Bug bootstrap/51036] [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51036

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> 2011-11-14 16:48:49 UTC ---
Revision 181347 bootstraps OK.

[Bug bootstrap/51036] [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51036

--- Comment #6 from Uros Bizjak <ubizjak at gmail dot com> 2011-11-14 18:55:06 UTC ---
(In reply to comment #3)
> (In reply to comment #2)
> > Hmm, it looks like I can't reproduce this anymore with r181280 on trunk.
> > 
> > Are you still seeing it?
> 
> No, due to [1]. But - isn't this patch just papering over real problem?
> 
> [1] http://gcc.gnu.org/ml/gcc-patches/2011-11/msg01631.html

Oh, this comment in fact belongs to PR 51112, also LTO bootstrap failure.

Sorry for the mess.

[Bug bootstrap/51036] [4.7 Regression] LTO bootstrap failed with bootstrap-profiled

[dodji at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51036

--- Comment #7 from Dodji Seketeli <dodji at gcc dot gnu.org> 2011-11-14 20:15:18 UTC ---
I am closing this then, as it appears fixed in trunk now.