[Bug c++/46240] New: ice in maybe_register_def

[Bug c++/46240] New: ice in maybe_register_def

[dcb314 at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

           Summary: ice in maybe_register_def
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: dcb314@hotmail.com


I just tried to compile package octave-3.2.4 with the latest 4.6
snapshot 20101023 on a Fedora Linux box. The compiler said

oct-norm.cc: In function 'VectorT dual_p(const VectorT&, R, R) [with VectorT =
Matrix, R = double]':
oct-norm.cc:396:9: internal compiler error: in maybe_register_def, at
tree-into-ssa.c:1875
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Source code attached. Flags -g -O3 required.

[Bug c++/46240] ice in maybe_register_def

[dcb314 at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

--- Comment #1 from dcb <dcb314 at hotmail dot com> 2010-10-30 11:43:35 UTC ---
Created attachment 22204
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22204
gzipped C++ source code

[Bug middle-end/46240] ice in maybe_register_def

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2010.10.30 14:21:40
          Component|c++                         |middle-end
                 CC|                            |hubicka at gcc dot gnu.org
     Ever Confirmed|0                           |1
   Target Milestone|---                         |4.6.0

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2010-10-30 14:21:40 UTC ---
It is caused by revision 162842:

http://gcc.gnu.org/ml/gcc-cvs/2010-08/msg00053.html

[Bug middle-end/46240] ice in maybe_register_def

[dcb314 at hotmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

--- Comment #3 from dcb <dcb314 at hotmail dot com> 2010-12-18 11:37:03 UTC ---
(In reply to comment #2)
> It is caused by revision 162842:
> 
> http://gcc.gnu.org/ml/gcc-cvs/2010-08/msg00053.html

Thanks for that. I can confirm the bug still exists
in snapshot 20101211.

[Bug middle-end/46240] [4.6 Regression] ice in maybe_register_def

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1

[Bug middle-end/46240] [4.6 Regression] ice in maybe_register_def

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-01-05 00:28:16 UTC ---
Created attachment 22902
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22902
pr46240.ii

Reduced testcase.  Fails with -g -O3, works with -g -O3
-fno-var-tracking-assignments.

[Bug middle-end/46240] [4.6 Regression] ice in maybe_register_def

[aoliva at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

Alexandre Oliva <aoliva at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
         AssignedTo|unassigned at gcc dot       |aoliva at gcc dot gnu.org
                   |gnu.org                     |

--- Comment #5 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2011-01-06 21:53:42 UTC ---
Mine

[Bug middle-end/46240] [4.6 Regression] ice in maybe_register_def

[aoliva at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2011-01-13 07:27:19 UTC ---
Created attachment 22955
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22955
Patch that fixes the bug, testing with enable-build-with-cxx bootstrap-O3

Here's the patch I'm testing.

[Bug debug/46240] [4.6 Regression] ice in maybe_register_def

[aoliva at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

--- Comment #7 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2011-01-19 22:07:16 UTC ---
Author: aoliva
Date: Wed Jan 19 22:07:14 2011
New Revision: 169035

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169035
Log:
gcc/ChangeLog:
PR debug/46240
* tree-into-ssa.c (maybe_register_def): Do not attempt to add
debug bind stmt on merge edges.
gcc/testsuite/ChangeLog:
PR debug/46240
* g++.dg/debug/pr46240.cc: New.

Added:
    trunk/gcc/testsuite/g++.dg/debug/pr46240.cc
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-into-ssa.c

[Bug debug/46240] [4.6 Regression] ice in maybe_register_def

[aoliva at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46240

Alexandre Oliva <aoliva at gcc dot gnu.org> changed:

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

--- Comment #8 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2011-01-19 22:11:33 UTC ---
Fixed