[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[belyshev at lubercy dot com]

------- Additional Comments From belyshev at lubercy dot com  2004-12-21 14:10 -------
Created an attachment (id=7795)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7795&action=view)
patch to regclass.c (1840 bytes)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] New: regclass.c miscompiled by -ftree-vectorize

[belyshev at lubercy dot com]

Hope I didn't mess anything with my gcc tree :)

Steps to reproduce:

1. apply the patch to regclass.c
2. compile record_operand_costs.i with "-O1 -ftree-vectorize" and link into cc1
3. use testcase bug.i to see segmentation fault

-- 
           Summary: regclass.c miscompiled by -ftree-vectorize
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P2
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: belyshev at lubercy dot com
                CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: i686-*-*


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[belyshev at lubercy dot com]

------- Additional Comments From belyshev at lubercy dot com  2004-12-21 14:11 -------
Created an attachment (id=7796)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7796&action=view)
failing function (5644 bytes)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[belyshev at lubercy dot com]

------- Additional Comments From belyshev at lubercy dot com  2004-12-21 14:12 -------
Created an attachment (id=7797)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7797&action=view)
testcase (349 bytes)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[belyshev at depni dot sinp dot msu dot ru]

------- Additional Comments From belyshev at depni dot sinp dot msu dot ru  2005-01-01 22:40 -------
GCC generates movdqa instruction which is not in sse set.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
 GCC target triplet|i686-*-*                    |i686-*-* -msse


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-01-01 21:15 -------
Does this testcase works:
void abort (void);

int main1 (void)
{
  int s[4], t[4], i;

  s[0] = s[1] = s[2] = s[3] = 1;

  for (i = 0; i < 4; i++)
    t[i] = s[i];

  if (!t [0])
    abort ();

  return 0;
}
int main(void)
{return main();}

If not then I think this is a dup of bug 16660.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[belyshev at depni dot sinp dot msu dot ru]

------- Additional Comments From belyshev at depni dot sinp dot msu dot ru  2005-01-01 21:06 -------
// reduced testcase, use "-O1 -ftree-vectorize"

void abort (void);

int main ()
{
  int s[4], t[4], i;

  s[0] = s[1] = s[2] = s[3] = 1;
  
  for (i = 0; i < 4; i++)
    t[i] = s[i];
  
  if (!t [0])
    abort ();
  
  return 0;
}


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-01-01 21:06:56
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[belyshev at depni dot sinp dot msu dot ru]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
Attachment #7795 is|0                           |1
           obsolete|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[belyshev at depni dot sinp dot msu dot ru]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
Attachment #7797 is|0                           |1
           obsolete|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107

[Bug tree-optimization/19107] regclass.c miscompiled by -ftree-vectorize

[belyshev at depni dot sinp dot msu dot ru]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
Attachment #7796 is|0                           |1
           obsolete|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19107