* ifcvt.c (struct noce_if_info): Add test_bb.
        (noce_get_alt_condition): New.
        (noce_try_minmax, noce_try_abs): New.
        (noce_operand_ok): New.
        (noce_process_if_block): Use them.
        * rtlanal.c (may_trap_p): NEG and ABS can never trap.

From-SVN: r40060