[Bug tree-optimization/21171] [4.0 Regression] Generates wrong code (w/ optimization) when copying data from a table to a table in a structure

[rearnsha at gcc dot gnu dot org]

------- Additional Comments From rearnsha at gcc dot gnu dot org  2005-04-26 
18:32 -------
Confirmed.  I suspect this is a tree loop optimization bug.  The final tree dump
has:

main ()
{
  void * D.1236;
  void * ivtmp.8;

<bb 0>:
  ivtmp.8 = &__IntTable[0];

<L0>:;
  ivtmp.8 = ivtmp.8 + 4B;
  D.1236 = &__IntTable[0] + 128B;
  if (ivtmp.8 != D.1236) goto <L0>; else goto <L2>;

<L2>:;
  return 0;

}


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rearnsha at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
          Component|target                      |tree-optimization
     Ever Confirmed|                            |1
  GCC build triplet|i386-unknown-netbsdelf2.0   |
   GCC host triplet|i386-unknown-netbsdelf2.0   |
   Last reconfirmed|0000-00-00 00:00:00         |2005-04-26 18:32:33
               date|                            |
            Summary|Generates wrong code (w/    |[4.0 Regression] Generates
                   |optimization) when copying  |wrong code (w/ optimization)
                   |data from a table to a table|when copying data from a
                   |in a structure              |table to a table in a
                   |                            |structure
   Target Milestone|---                         |4.0.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21171