* tree-ssa-phiopt.c (abs_replacement): New function.
        (empty_block_p): New function extracted from...
        (candidate_bb_for_phi_optimization): Break out empty block test.
        (conditional_replacement): Use empty_block_p.
        (value_replacement): Similarly.

        * gcc.dg/tree-ssa/20040514-2.c: Update expected output.
        * gcc.dg/tree-ssa/20040518-2.c: New test.

Co-Authored-By: Jeff Law <law@redhat.com>

From-SVN: r82017