re PR tree-optimization/17558 (internal compiler error: in merge_alias_info, at tree-ssa-copy.c:182)

2004-09-20  Andrew Pinski  <pinskia@physics.uc.edu>

        PR tree-opt/17558
        * tree-ssa-copy.c (may_propagate_copy): Only allow if the
        aliasing sets are the same rather than just conflicting.

From-SVN: r87772