[Bug tree-optimization/27283] New: [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[Bug tree-optimization/27283] New: [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[tbm at cyrius dot com]

851:tbm@test: ~] /usr/lib/gcc-snapshot/bin/g++ -c -O2 mini.c
 Conflict NewMins$maxdex_410(ab) and NewMins$maxdex_7(ab) across an abnormal
edge from BB7->BB39
mini.c: In member function 'gIndexOdometer
gIndexOdometer::AfterExcisionOf(int&) const':
mini.c:43: internal compiler error: SSA corruption
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
zsh: exit 1     /usr/lib/gcc-snapshot/bin/g++ -c -O2 mini.c
852:tbm@test: ~] /usr/lib/gcc-snapshot/bin/g++ -c mini.c
853:tbm@test: ~] g++-4.1 -c -O2 mini.c


-- 
           Summary: [4.2 regression] ICE: SSA corruption - Conflict across
                    an abnormal edge
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com
 GCC build triplet: powerpc-linux-gnu
  GCC host triplet: powerpc-linux-gnu
GCC target triplet: powerpc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[tbm at cyrius dot com]

------- Comment #1 from tbm at cyrius dot com  2006-04-24 14:24 -------
Created an attachment (id=11325)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11325&action=view)
test case


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
           Keywords|                            |ice-on-valid-code
   Target Milestone|---                         |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-04-25 01:20 -------
It fails at -O1 so we know it is not PRE which is good news.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-04-25 01:20:53
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2006-04-25 01:26 -------
If I turn off IV-Opts it works.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rakdver at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[rakdver at gcc dot gnu dot org]

-- 

rakdver at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rakdver at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2006-04-25 01:20:53         |2006-04-27 05:48:17
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[rakdver at gcc dot gnu dot org]

------- Comment #4 from rakdver at gcc dot gnu dot org  2006-04-27 15:00 -------
Patch:

http://gcc.gnu.org/ml/gcc-patches/2006-04/msg01044.html


-- 

rakdver at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2006-
                   |                            |04/msg01044.html
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[rakdver at gcc dot gnu dot org]

------- Comment #5 from rakdver at gcc dot gnu dot org  2006-05-01 20:06 -------
Subject: Bug 27283

Author: rakdver
Date: Mon May  1 20:05:57 2006
New Revision: 113427

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113427
Log:
        PR tree-optimization/27283
        * tree-ssa-loop-ivopts.c (struct nfe_cache_elt): Store just trees,
        not whole # of iteration descriptions.
        (niter_for_exit): Return just # of iterations.  Fail if # of iterations
        uses abnormal ssa name.
        (niter_for_single_dom_exit): Ditto.
        (find_induction_variables, may_eliminate_iv): Expect niter_for_exit to
        return just the number of iterations.

        * g++.dg/tree-ssa/pr27283.C: New test.


Added:
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr27283.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2006-05-02 04:51 -------
Fixed.


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[tbm at cyrius dot com]

------- Comment #7 from tbm at cyrius dot com  2006-05-11 08:22 -------
While the test case submitted to this PR indeed works now, the software program
which originally showed the bug shows that it's still there.  Here's a new test
case.


-- 

tbm at cyrius dot com changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[tbm at cyrius dot com]

------- Comment #8 from tbm at cyrius dot com  2006-05-11 08:24 -------
Created an attachment (id=11438)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=11438&action=view)
new test case

1657:tbm@test: ~] /usr/lib/gcc-snapshot/bin/g++ -c -O1 mini.c

 Conflict NewMins$maxdex_407(ab) and NewMins$maxdex_379(ab) across an abnormal
edge from BB8->BB42
mini.c: In member function 'gIndexOdometer
gIndexOdometer::AfterExcisionOf(int&) const':
mini.c:45: internal compiler error: SSA corruption
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
zsh: exit 1     /usr/lib/gcc-snapshot/bin/g++ -c -O1 mini.c
1658:tbm@test: ~] /usr/lib/gcc-snapshot/bin/g++ -c mini.c
1659:tbm@test: ~] /usr/lib/gcc-snapshot/bin/g++ -v
Using built-in specs.
Target: powerpc-linux-gnu
Configured with: ../src/configure -v
--enable-languages=c,c++,java,fortran,objc,obj-c++,treelang
--prefix=/usr/lib/gcc-snapshot --enable-shared --with-system-zlib --disable-nls
--enable-__cxa_atexit --enable-clocale=gnu --enable-libstdcxx-debug
--enable-java-awt=gtk --enable-gtk-cairo
--with-java-home=/usr/lib/gcc-snapshot/jre --enable-mpfr --disable-multilib
--disable-werror powerpc-linux-gnu
Thread model: posix
gcc version 4.2.0 20060508 (experimental)
1660:tbm@test: ~]


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[pinskia at gcc dot gnu dot org]

------- Comment #9 from pinskia at gcc dot gnu dot org  2006-05-11 08:26 -------
The orginal problem is fixed and Martin is opening a new bug for the other
issue.


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[tbm at cyrius dot com]

------- Comment #10 from tbm at cyrius dot com  2006-05-11 08:30 -------
See PR27548 for the new one.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283

[Bug tree-optimization/27283] [4.2 regression] ICE: SSA corruption - Conflict across an abnormal edge

[jakub at gcc dot gnu dot org]

------- Comment #11 from jakub at gcc dot gnu dot org  2006-05-17 08:24 -------
Subject: Bug 27283

Author: jakub
Date: Wed May 17 08:23:55 2006
New Revision: 113843

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=113843
Log:
        PR tree-optimization/27549
        Backported from mainline

        2006-05-01  Zdenek Dvorak  <dvorakz@suse.cz>

        PR tree-optimization/27283
        * tree-ssa-loop-ivopts.c (struct nfe_cache_elt): Store just trees,
        not whole # of iteration descriptions.
        (niter_for_exit): Return just # of iterations.  Fail if # of iterations
        uses abnormal ssa name.
        (niter_for_single_dom_exit): Ditto.
        (find_induction_variables, may_eliminate_iv): Expect niter_for_exit to
        return just the number of iterations.
        (add_iv_outer_candidates, may_replace_final_value): Likewise.

        * g++.dg/tree-ssa/pr27283.C: New test.
        * g++.dg/tree-ssa/pr27549.C: New test.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/g++.dg/tree-ssa/pr27283.C
    branches/gcc-4_1-branch/gcc/testsuite/g++.dg/tree-ssa/pr27549.C
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_1-branch/gcc/tree-ssa-loop-ivopts.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27283