[Bug middle-end/13236] New: Internal compiler error: in add_may_alias

["pbrook at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

When compiling some lapack files with gfortran, I'm getting the following:  
 
$ gfortran -O2 -xf95 -c sgesvd.f 
sgesvd.f: In function `sgesvd': 
sgesvd.f:0: internal compiler error: in add_may_alias, at tree-dfa.c:2233 
 
I haven't manged to reduce it down to a simple testcase. Cut-down versions of 
the routine don't seem to trip over the same error. I haven't been abot to 
identify any particular characteristics that trigger the big, sorry! 
  
The relevant section of tree-dfa.c is: 
 
add_may_alias (tree var, tree alias)  
{  
  size_t i;  
  var_ann_t v_ann = get_var_ann (var);  
  var_ann_t a_ann = get_var_ann (alias);  
  
#if defined ENABLE_CHECKING  
  if (var == alias)  
    abort ();  
#endif

-- 
           Summary: Internal compiler error: in add_may_alias
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P2
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pbrook at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13236