[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[jean-marc dot valin at usherbrooke dot ca]

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------- Comment #2 from jean-marc dot valin at usherbrooke dot ca  2005-11-02 00:09 -------
It seems like it is a regression in a case I have:

% gcc -O2 -ftree-loop-linear -c vq.c
vq.c: In function ‘vq_index’:
vq.c:2: internal compiler error: in lambda_loopnest_to_gcc_loopnest, at
lambda-code.c:1982

I'm getting this ICE with gcc-4.1-20051029 but not with gcc-4.0.2-20050808 (or
is this another bug)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[jean-marc dot valin at usherbrooke dot ca]

------- Comment #3 from jean-marc dot valin at usherbrooke dot ca  2005-11-02 00:12 -------
Forgot to include the code. This is a function from the Speex coded:

int vq_index(float *in, const float *codebook, int len, int entries)
{
   int i,j;
   float min_dist=0;
   int best_index=0;
   for (i=0;i<entries;i++)
   {
      float dist=0;
      for (j=0;j<len;j++)
      {
         float tmp = in[j]-*codebook++;
         dist += tmp*tmp;
      }
      if (i==0 || dist<min_dist)
      {
         min_dist=dist;
         best_index=i;
      }
   }
   return best_index;
}


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2005-11-02 00:20 -------
(In reply to comment #2)
> It seems like it is a regression in a case I have:
It is either this bug or PR 24309.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[jean-marc dot valin at usherbrooke dot ca]

------- Comment #5 from jean-marc dot valin at usherbrooke dot ca  2005-11-02 01:04 -------
> It is either this bug or PR 24309.

I'm not sure. This bug happens even at -O2, while 24309 needs -O3. Both are
different files in Speex though. Wouldn't it be worth adding Speex to the list
of software to test on given that 1) it has a tendency to break gcc and 2) it's
not included in most Linux distros?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2005-12-15 20:35 -------
*** Bug 25433 has been marked as a duplicate of this bug. ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |zlynx at acm dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[pinskia at gcc dot gnu dot org]

------- Comment #7 from pinskia at gcc dot gnu dot org  2006-01-23 18:48 -------
*** Bug 25929 has been marked as a duplicate of this bug. ***


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |seandarcy2 at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[vapier at gentoo dot org]

------- Comment #8 from vapier at gentoo dot org  2006-04-29 00:17 -------
passes for me with 4.0.[123] but 4.2.0 fails (i'd update the Known fields but
lack the power)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[rguenth at gcc dot gnu dot org]

------- Comment #9 from rguenth at gcc dot gnu dot org  2007-04-30 10:20 -------
Also fails with 4.3.0.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.0.0 4.1.0                 |4.0.0 4.1.0 4.3.0
   Last reconfirmed|2005-09-11 14:42:37         |2007-04-30 10:20:24
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[dberlin at dberlin dot org]

------- Comment #10 from dberlin at gcc dot gnu dot org  2007-04-30 18:26 -------
Subject: Re:  ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

This one is unimplemented functionality, it's going to take longer to solve.
(Sadly, at the point where we hit it, we can't back out gracefully,
hence the iCE).


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[spop at gcc dot gnu dot org]

------- Comment #11 from spop at gcc dot gnu dot org  2007-10-19 19:02 -------
Subject: Bug 23820

Author: spop
Date: Fri Oct 19 19:01:58 2007
New Revision: 129494

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=129494
Log:
2007-10-19  Sebastian Pop  <sebastian.pop@amd.com>

        PR tree-optimization/23820
        PR tree-optimization/24309
        PR tree-optimization/33766
        * testsuite/gcc.dg/tree-ssa/pr23820.c: New.
        * testsuite/gcc.dg/tree-ssa/pr24309.c: New.
        * testsuite/gcc.dg/tree-ssa/pr33766.c: New.
        * testsuite/gcc.dg/tree-ssa/ltrans-3.c: XFAILed.
        * tree-loop-linear.c (perfect_loop_nest_depth): New.
        (linear_transform_loops): Use perfect_loop_nest_depth.
        * lambda-code.c (perfect_nest_p): Outer loops in perfect nests 
        should have a single condition: their exit.


Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr23820.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr24309.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr33766.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/lambda-code.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ltrans-3.c
    trunk/gcc/tree-loop-linear.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[spop at gcc dot gnu dot org]

------- Comment #12 from spop at gcc dot gnu dot org  2007-10-19 19:02 -------
Fixed.


-- 

spop at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820

[Bug tree-optimization/23820] ICE in lambda_loopnest_to_gcc_loopnest, at lambda-code.c:1982

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-09-11 14:42 -------
Confirmed but not a regression.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
      Known to fail|                            |4.0.0 4.1.0
   Last reconfirmed|0000-00-00 00:00:00         |2005-09-11 14:42:37
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23820