Yes, this looks good. OK for trunk, but please add a note about those additional changes you made to the ChangeLog entry. Thanks!
Thanks, done with this entry: 2013-05-21 Christian Bruel <christian.br...@st.com> * dwarf2out.c (multiple_reg_loc_descriptor): Use dbx_reg_number for spanning registers. LEAF_REG_REMAP is supported only for contiguous registers. Set register size out of the PARALLEL loop. Cheers