[Bug middle-end/32033] New: [4.3 Regression] ICE in fold_comparison, at fold-const.c:8531 at -O3

[Bug middle-end/32033] New: [4.3 Regression] ICE in fold_comparison, at fold-const.c:8531 at -O3

[tbm at cyrius dot com]

I'm getting the following ICE at -O3 with 4.3.  This was introduced between
0070422 and 20070515.

(sid)24742:tbm@em64t: ~] /usr/lib/gcc-snapshot/bin/g++ -c -O3 crawl-beam.ii
beam.cc: In function 'void explosion(bolt&, bool)':
beam.cc:4055: internal compiler error: in fold_comparison, at fold-const.c:8531
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.


-- 
           Summary: [4.3 Regression] ICE in fold_comparison, at fold-
                    const.c:8531 at -O3
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tbm at cyrius dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32033

[Bug middle-end/32033] [4.3 Regression] ICE in fold_comparison, at fold-const.c:8531 at -O3

[tbm at cyrius dot com]

------- Comment #1 from tbm at cyrius dot com  2007-05-22 11:11 -------
Reduced testcase:

static int spready[] = {
};
void explosion_map (int y)
{
  for (int i = 0; i < 4; i++)
    if (y * spready[i] < 0)
      break;
}
void explosion (void)
{
  explosion_map (0);
  for (int i = 0; i < 2; i++)
    continue;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32033

[Bug middle-end/32033] [4.3 Regression] ICE in fold_comparison, at fold-const.c:8531 at -O3

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2007-05-22 13:26 -------
Confirmed.  We enter with the unfolded tree

  D.2472_4 * 0  <  0

which is propagated from

  D.2473_6 = D.2472_4 * 0

during forwprop.  inlining is not properly folding its trees during inlining
of explosion_map (0).


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org, hubicka at gcc dot gnu
                   |                            |dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-05-22 13:26:45
               date|                            |
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32033

[Bug middle-end/32033] [4.3 Regression] ICE in fold_comparison, at fold-const.c:8531 at -O3

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2007-05-22 23:08 -------
I know what this issue is.  This is most likely the same issue as PR 30564,
which I need to get around to fixing still.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |30564


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32033

[Bug middle-end/32033] [4.3 Regression] ICE in fold_comparison, at fold-const.c:8531 at -O3

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2007-05-22 23:10 -------
And it is the same as my patch fixes the problem also so closing as a dup.

*** This bug has been marked as a duplicate of 30564 ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32033