PR tree-optimization/23048
       * tree-if-conv.c (if_convertible_bb_p): Supply basic_block as
       third parameter. Check whether latch is dominated by exit
       block or not.
       (if_convertible_loop_p): Supply exit block itself to
       if_convertible_bb_p.

       * gcc.dg/tree-ssa/pr23048.c: New test.

From-SVN: r103287