[Bug c/12781] New: ICE in cprop_into_phis

[Bug c/12781] New: ICE in cprop_into_phis

[green at redhat dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12781

           Summary: ICE in cprop_into_phis
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: green at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu

The tree-ssa compiler recently stopped building bfd.  The change happened some
time on Oct 24 or 25.  I'll upload the preprocessed test source.

$ gcc --version
gcc (GCC) 3.5-tree-ssa 20031025 (merged 20031017)
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ gcc -O1 syms.i
../../src/HEAD-2003-10-25/bfd/syms.c: In function
`_bfd_stab_section_find_nearest_line':
 
../../src/HEAD-2003-10-25/bfd/syms.c:891: internal compiler error: in
cprop_into_phis, at tree-ssa-dom.c:1696
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

[Bug c/12781] ICE in cprop_into_phis

[green at redhat dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12781



------- Additional Comments From green at redhat dot com  2003-10-26 23:24 -------
Created an attachment (id=5004)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5004&action=view)
Preprocessed source for reproducing problem.

[Bug c/12781] ICE in cprop_into_phis

[dberlin at gcc dot gnu dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12781



------- Additional Comments From dberlin at gcc dot gnu dot org  2003-10-26 23:48 -------
This test works fine on 10/23, so something in between then and now causes it to fail.

Ahh. I see.
It's another PRE  edge splitting related problem, AFAICT.
I'd suggest we pass on this bug until we can pre-split all edges, at which point it will hopefully just 
go away.

[Bug optimization/12781] ICE in cprop_into_phis

[pinskia at gcc dot gnu dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12781


pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |12447
         AssignedTo|unassigned at gcc dot gnu   |dberlin at gcc dot gnu dot
                   |dot org                     |org
             Status|UNCONFIRMED                 |ASSIGNED
          Component|c                           |optimization
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2003-10-30 05:26:35
               date|                            |

[Bug optimization/12781] ICE in cprop_into_phis

[dberlin at gcc dot gnu dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12781

Bug 12781 depends on bug 12447, which changed state.

Bug 12447 Summary: [tree-ssa] ICE: segfault in require_phi
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12447

           What    |Old Value                   |New Value
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

[Bug optimization/12781] ICE in cprop_into_phis

[green at redhat dot com]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12781


green at redhat dot com changed:

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


------- Additional Comments From green at redhat dot com  2003-10-31 00:56 -------
This appears to be fixed now.  

Thanks,  

AG

[Bug optimization/12781] ICE in cprop_into_phis

[dhazeghi at yahoo dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |tree-ssa


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12781