[Bug debug/78839] [6 Regression] DWARF output different between GCC 5 and 6

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78839

--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jan 17 20:34:58 2017
New Revision: 244555

URL: https://gcc.gnu.org/viewcvs?rev=244555&root=gcc&view=rev
Log:
        PR debug/78839
        * dwarf2out.c (field_byte_offset): Restore the
        PCC_BITFIELD_TYPE_MATTERS behavior for INTEGER_CST DECL_FIELD_OFFSET
        and DECL_FIELD_BIT_OFFSET.  Use fold_build2 instead of build2 + fold.
        (analyze_variants_discr, gen_variant_part): Use fold_build2 instead
        of build2 + fold.

Modified:
    branches/gcc-6-branch/gcc/ChangeLog
    branches/gcc-6-branch/gcc/dwarf2out.c