combine.c i (set_nonzero_bits_and_sign_copies): Split code updating rsp->sign_bit_cop...

combine.c i (set_nonzero_bits_and_sign_copies): Split code updating rsp->sign_bit_copies and rsp->nonzero_bits into ...

2015-05-12  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    * combine.c i(set_nonzero_bits_and_sign_copies): Split code updating
    rsp->sign_bit_copies and rsp->nonzero_bits into ...
    (update_rsp_from_reg_equal): This.  Also use REG_EQUAL note on src if
    present to get more accurate information about the number of sign bit
    copies and non zero bits.

From-SVN: r223034