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List:       gcc-bugs
Subject:    [Bug tree-optimization/30565] ICE with -O1 -ftree-pre -ftree-loop-linear
From:       "dberlin at dberlin dot org" <gcc-bugzilla () gcc ! gnu ! org>
Date:       2007-04-30 17:42:31
Message-ID: 20070430174231.25329.qmail () sourceware ! org
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------- Comment #4 from dberlin at gcc dot gnu dot org  2007-04-30 18:42 -------
Subject: Re:  ICE with -O1 -ftree-pre -ftree-loop-linear

Something in perfect_nestify is fucking up the dominators, but it's
not clear why every set_immediate_dominator there is not correct.

On 30 Apr 2007 09:17:48 -0000, rguenth at gcc dot gnu dot org
<gcc-bugzilla@gcc.gnu.org> wrote:
>
>
> ------- Comment #3 from rguenth at gcc dot gnu dot org  2007-04-30 10:17 -------
> Program received signal SIGSEGV, Segmentation fault.
> 0x08184f89 in compute_dominance_frontiers_1 (frontiers=0x8af0688)
>     at /home/richard/src/trunk2/gcc/cfganal.c:1057
> 1057                      if (bitmap_bit_p (frontiers[runner->index],
> b->index))
> (gdb) print runner
> $2 = (basic_block) 0x0
>
> CFG is hosed.
>
> (gdb) bt
> #0  0x08184f89 in compute_dominance_frontiers_1 (frontiers=0x8af0688)
>     at /home/richard/src/trunk2/gcc/cfganal.c:1057
> #1  0x08185055 in compute_dominance_frontiers (frontiers=0x8af0688)
>     at /home/richard/src/trunk2/gcc/cfganal.c:1075
> #2  0x084a20ad in update_ssa (update_flags=1024)
>     at /home/richard/src/trunk2/gcc/tree-into-ssa.c:3277
> #3  0x0856163d in rewrite_into_loop_closed_ssa (changed_bbs=0x0,
>     update_flag=4096) at /home/richard/src/trunk2/gcc/tree-ssa-loop-manip.c:391
> #4  0x088cf131 in linear_transform_loops ()
>     at /home/richard/src/trunk2/gcc/tree-loop-linear.c:367
> #5  0x08571cd4 in tree_linear_transform ()
>
> Zdenek?
>
>
> --
>
> rguenth at gcc dot gnu dot org changed:
>
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |dberlin at gcc dot gnu dot
>                    |                            |org, rakdver at gcc dot gnu
>                    |                            |dot org
>              Status|UNCONFIRMED                 |NEW
>      Ever Confirmed|0                           |1
>    Last reconfirmed|0000-00-00 00:00:00         |2007-04-30 10:17:47
>                date|                            |
>             Summary|ICE with -O1 -ftree-pre -   |ICE with -O1 -ftree-pre -
>                    |ftree-loop-linear -funroll- |ftree-loop-linear
>                    |loops                       |
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30565
>
> ------- You are receiving this mail because: -------
> You are on the CC list for the bug, or are watching someone who is.
>


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30565

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